From 4e0e3435b50285eafe5898124ce02f7577f6803a Mon Sep 17 00:00:00 2001
From: Hongtao Jia <hongtao.jia@freescale.com>
Date: Sun, 28 Apr 2013 13:20:08 +0800
Subject: powerpc/85xx: Add machine check handler to fix PCIe erratum on
 mpc85xx

A PCIe erratum of mpc85xx may causes a core hang when a link of PCIe
goes down. when the link goes down, Non-posted transactions issued
via the ATMU requiring completion result in an instruction stall.
At the same time a machine-check exception is generated to the core
to allow further processing by the handler. We implements the handler
which skips the instruction caused the stall.

This patch depends on patch:
powerpc/85xx: Add platform_device declaration to fsl_pci.h

Signed-off-by: Zhao Chenhui <b35336@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Liu Shuo <soniccat.liu@gmail.com>
Signed-off-by: Jia Hongtao <hongtao.jia@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/kernel/cpu_setup_fsl_booke.S | 2 +-
 arch/powerpc/kernel/traps.c               | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/cpu_setup_fsl_booke.S b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
index 0b9af015bedc..bfb18c7290b7 100644
--- a/arch/powerpc/kernel/cpu_setup_fsl_booke.S
+++ b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
@@ -75,7 +75,7 @@ _GLOBAL(__setup_cpu_e500v2)
 	bl	__e500_icache_setup
 	bl	__e500_dcache_setup
 	bl	__setup_e500_ivors
-#ifdef CONFIG_FSL_RIO
+#if defined(CONFIG_FSL_RIO) || defined(CONFIG_FSL_PCI)
 	/* Ensure that RFXE is set */
 	mfspr	r3,SPRN_HID1
 	oris	r3,r3,HID1_RFXE@h
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index bf33c22e38a4..f58eaf23e8f1 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -62,6 +62,7 @@
 #include <asm/switch_to.h>
 #include <asm/tm.h>
 #include <asm/debug.h>
+#include <sysdev/fsl_pci.h>
 
 #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC)
 int (*__debugger)(struct pt_regs *regs) __read_mostly;
@@ -567,6 +568,8 @@ int machine_check_e500(struct pt_regs *regs)
 	if (reason & MCSR_BUS_RBERR) {
 		if (fsl_rio_mcheck_exception(regs))
 			return 1;
+		if (fsl_pci_mcheck_exception(regs))
+			return 1;
 	}
 
 	printk("Machine check in kernel mode.\n");
-- 
cgit v1.2.3


From e00c9a0c2ef8aacb2e63121fcce69687c8d932ca Mon Sep 17 00:00:00 2001
From: Dongsheng Wang <dongsheng.wang@freescale.com>
Date: Tue, 14 May 2013 16:05:56 +0800
Subject: powerpc/mpc85xx: invalidate TLB after hibernation resume

This problem belongs to the core synchronization issues.
The cpu1 already updated spin_table values, but bootcore cannot get
this value in time.

After bootcpu hibiernation restore the pages. we are now running
with the kernel data of the old kernel fully restored. if we reset
the non-bootcpus that will be reset cache(tlb), the non-bootcpus
will get new address(map virtual and physical address spaces).
but bootcpu tlb cache still use boot kernel data, so we need to
invalidate the bootcpu tlb cache make it to get new main memory data.

log:
Enabling non-boot CPUs ...
smp_85xx_kick_cpu: timeout waiting for core 1 to reset
smp: failed starting cpu 1 (rc -2)
Error taking CPU1 up: -2

Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Reviewed-by: Anton Vorontsov <anton@enomsg.org>
[scottwood@freescale.com: reworded code comment for clarity]
Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/kernel/swsusp_booke.S | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/swsusp_booke.S b/arch/powerpc/kernel/swsusp_booke.S
index 11a39307dd71..0f204053e5b5 100644
--- a/arch/powerpc/kernel/swsusp_booke.S
+++ b/arch/powerpc/kernel/swsusp_booke.S
@@ -141,6 +141,14 @@ _GLOBAL(swsusp_arch_resume)
 	lis	r11,swsusp_save_area@h
 	ori	r11,r11,swsusp_save_area@l
 
+	/*
+	 * Mappings from virtual addresses to physical addresses may be
+	 * different than they were prior to restoring hibernation state. 
+	 * Invalidate the TLB so that the boot CPU is using the new
+	 * mappings.
+	 */
+	bl	_tlbil_all
+
 	lwz	r4,SL_SPRG0(r11)
 	mtsprg	0,r4
 	lwz	r4,SL_SPRG1(r11)
-- 
cgit v1.2.3


From 5815c434fdb87b9e2f7d2268d29534e8b0011439 Mon Sep 17 00:00:00 2001
From: Lijun Pan <LIJUN.PAN@FREESCALE.COM>
Date: Wed, 5 Jun 2013 15:22:09 -0500
Subject: powerpc/perf: add 2 additional performance monitor counters for e6500
 core

There are 6 counters in e6500 core instead of 4 in e500 core.

Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/include/asm/reg_fsl_emb.h   | 12 ++++++++++++
 arch/powerpc/kernel/cputable.c           |  2 +-
 arch/powerpc/oprofile/op_model_fsl_emb.c | 30 ++++++++++++++++++++++++++++++
 arch/powerpc/perf/core-fsl-emb.c         | 24 ++++++++++++++++++++++++
 4 files changed, 67 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/reg_fsl_emb.h b/arch/powerpc/include/asm/reg_fsl_emb.h
index 1cf8ab08e581..c51d52ed7b0f 100644
--- a/arch/powerpc/include/asm/reg_fsl_emb.h
+++ b/arch/powerpc/include/asm/reg_fsl_emb.h
@@ -19,10 +19,14 @@
 #define PMRN_PMC1	0x011	/* Performance Monitor Counter 1 */
 #define PMRN_PMC2	0x012	/* Performance Monitor Counter 2 */
 #define PMRN_PMC3	0x013	/* Performance Monitor Counter 3 */
+#define PMRN_PMC4	0x014	/* Performance Monitor Counter 4 */
+#define PMRN_PMC5	0x015	/* Performance Monitor Counter 5 */
 #define PMRN_PMLCA0	0x090	/* PM Local Control A0 */
 #define PMRN_PMLCA1	0x091	/* PM Local Control A1 */
 #define PMRN_PMLCA2	0x092	/* PM Local Control A2 */
 #define PMRN_PMLCA3	0x093	/* PM Local Control A3 */
+#define PMRN_PMLCA4	0x094	/* PM Local Control A4 */
+#define PMRN_PMLCA5	0x095	/* PM Local Control A5 */
 
 #define PMLCA_FC	0x80000000	/* Freeze Counter */
 #define PMLCA_FCS	0x40000000	/* Freeze in Supervisor */
@@ -38,6 +42,8 @@
 #define PMRN_PMLCB1	0x111	/* PM Local Control B1 */
 #define PMRN_PMLCB2	0x112	/* PM Local Control B2 */
 #define PMRN_PMLCB3	0x113	/* PM Local Control B3 */
+#define PMRN_PMLCB4	0x114	/* PM Local Control B4 */
+#define PMRN_PMLCB5	0x115	/* PM Local Control B5 */
 
 #define PMLCB_THRESHMUL_MASK	0x0700	/* Threshold Multiple Field */
 #define PMLCB_THRESHMUL_SHIFT	8
@@ -57,14 +63,20 @@
 #define PMRN_UPMC1	0x001	/* User Performance Monitor Counter 1 */
 #define PMRN_UPMC2	0x002	/* User Performance Monitor Counter 2 */
 #define PMRN_UPMC3	0x003	/* User Performance Monitor Counter 3 */
+#define PMRN_UPMC4	0x004	/* User Performance Monitor Counter 4 */
+#define PMRN_UPMC5	0x005	/* User Performance Monitor Counter 5 */
 #define PMRN_UPMLCA0	0x080	/* User PM Local Control A0 */
 #define PMRN_UPMLCA1	0x081	/* User PM Local Control A1 */
 #define PMRN_UPMLCA2	0x082	/* User PM Local Control A2 */
 #define PMRN_UPMLCA3	0x083	/* User PM Local Control A3 */
+#define PMRN_UPMLCA4	0x084	/* User PM Local Control A4 */
+#define PMRN_UPMLCA5	0x085	/* User PM Local Control A5 */
 #define PMRN_UPMLCB0	0x100	/* User PM Local Control B0 */
 #define PMRN_UPMLCB1	0x101	/* User PM Local Control B1 */
 #define PMRN_UPMLCB2	0x102	/* User PM Local Control B2 */
 #define PMRN_UPMLCB3	0x103	/* User PM Local Control B3 */
+#define PMRN_UPMLCB4	0x104	/* User PM Local Control B4 */
+#define PMRN_UPMLCB5	0x105	/* User PM Local Control B5 */
 #define PMRN_UPMGC0	0x180	/* User PM Global Control 0 */
 
 
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 2a45d0f04385..c05256cb3b1c 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -2087,7 +2087,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
 			MMU_FTR_USE_TLBILX,
 		.icache_bsize		= 64,
 		.dcache_bsize		= 64,
-		.num_pmcs		= 4,
+		.num_pmcs		= 6,
 		.oprofile_cpu_type	= "ppc/e6500",
 		.oprofile_type		= PPC_OPROFILE_FSL_EMB,
 		.cpu_setup		= __setup_cpu_e6500,
diff --git a/arch/powerpc/oprofile/op_model_fsl_emb.c b/arch/powerpc/oprofile/op_model_fsl_emb.c
index ccc1daa33aed..2a82d3ed464d 100644
--- a/arch/powerpc/oprofile/op_model_fsl_emb.c
+++ b/arch/powerpc/oprofile/op_model_fsl_emb.c
@@ -46,6 +46,12 @@ static inline u32 get_pmlca(int ctr)
 		case 3:
 			pmlca = mfpmr(PMRN_PMLCA3);
 			break;
+		case 4:
+			pmlca = mfpmr(PMRN_PMLCA4);
+			break;
+		case 5:
+			pmlca = mfpmr(PMRN_PMLCA5);
+			break;
 		default:
 			panic("Bad ctr number\n");
 	}
@@ -68,6 +74,12 @@ static inline void set_pmlca(int ctr, u32 pmlca)
 		case 3:
 			mtpmr(PMRN_PMLCA3, pmlca);
 			break;
+		case 4:
+			mtpmr(PMRN_PMLCA4, pmlca);
+			break;
+		case 5:
+			mtpmr(PMRN_PMLCA5, pmlca);
+			break;
 		default:
 			panic("Bad ctr number\n");
 	}
@@ -84,6 +96,10 @@ static inline unsigned int ctr_read(unsigned int i)
 			return mfpmr(PMRN_PMC2);
 		case 3:
 			return mfpmr(PMRN_PMC3);
+		case 4:
+			return mfpmr(PMRN_PMC4);
+		case 5:
+			return mfpmr(PMRN_PMC5);
 		default:
 			return 0;
 	}
@@ -104,6 +120,12 @@ static inline void ctr_write(unsigned int i, unsigned int val)
 		case 3:
 			mtpmr(PMRN_PMC3, val);
 			break;
+		case 4:
+			mtpmr(PMRN_PMC4, val);
+			break;
+		case 5:
+			mtpmr(PMRN_PMC5, val);
+			break;
 		default:
 			break;
 	}
@@ -133,6 +155,14 @@ static void init_pmc_stop(int ctr)
 			mtpmr(PMRN_PMLCA3, pmlca);
 			mtpmr(PMRN_PMLCB3, pmlcb);
 			break;
+		case 4:
+			mtpmr(PMRN_PMLCA4, pmlca);
+			mtpmr(PMRN_PMLCB4, pmlcb);
+			break;
+		case 5:
+			mtpmr(PMRN_PMLCA5, pmlca);
+			mtpmr(PMRN_PMLCB5, pmlcb);
+			break;
 		default:
 			panic("Bad ctr number!\n");
 	}
diff --git a/arch/powerpc/perf/core-fsl-emb.c b/arch/powerpc/perf/core-fsl-emb.c
index 0b13f74f5fb3..d35ae52c69dc 100644
--- a/arch/powerpc/perf/core-fsl-emb.c
+++ b/arch/powerpc/perf/core-fsl-emb.c
@@ -70,6 +70,12 @@ static unsigned long read_pmc(int idx)
 	case 3:
 		val = mfpmr(PMRN_PMC3);
 		break;
+	case 4:
+		val = mfpmr(PMRN_PMC4);
+		break;
+	case 5:
+		val = mfpmr(PMRN_PMC5);
+		break;
 	default:
 		printk(KERN_ERR "oops trying to read PMC%d\n", idx);
 		val = 0;
@@ -95,6 +101,12 @@ static void write_pmc(int idx, unsigned long val)
 	case 3:
 		mtpmr(PMRN_PMC3, val);
 		break;
+	case 4:
+		mtpmr(PMRN_PMC4, val);
+		break;
+	case 5:
+		mtpmr(PMRN_PMC5, val);
+		break;
 	default:
 		printk(KERN_ERR "oops trying to write PMC%d\n", idx);
 	}
@@ -120,6 +132,12 @@ static void write_pmlca(int idx, unsigned long val)
 	case 3:
 		mtpmr(PMRN_PMLCA3, val);
 		break;
+	case 4:
+		mtpmr(PMRN_PMLCA4, val);
+		break;
+	case 5:
+		mtpmr(PMRN_PMLCA5, val);
+		break;
 	default:
 		printk(KERN_ERR "oops trying to write PMLCA%d\n", idx);
 	}
@@ -145,6 +163,12 @@ static void write_pmlcb(int idx, unsigned long val)
 	case 3:
 		mtpmr(PMRN_PMLCB3, val);
 		break;
+	case 4:
+		mtpmr(PMRN_PMLCB4, val);
+		break;
+	case 5:
+		mtpmr(PMRN_PMLCB5, val);
+		break;
 	default:
 		printk(KERN_ERR "oops trying to write PMLCB%d\n", idx);
 	}
-- 
cgit v1.2.3


From 4e21b94c9c644c43223878f4c848e852743e789c Mon Sep 17 00:00:00 2001
From: Laurentiu TUDOR <Laurentiu.Tudor@freescale.com>
Date: Wed, 3 Jul 2013 17:13:15 +0300
Subject: powerpc/85xx: Move ePAPR paravirt initialization earlier

At console init, when the kernel tries to flush the log buffer
the ePAPR byte-channel based console write fails silently,
losing the buffered messages.
This happens because The ePAPR para-virtualization init isn't
done early enough so that the hcall instruction to be set,
causing the byte-channel write hcall to be a nop.
To fix, change the ePAPR para-virt init to use early device
tree functions and move it in early init.

Signed-off-by: Laurentiu Tudor <Laurentiu.Tudor@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/include/asm/epapr_hcalls.h |  6 ++++++
 arch/powerpc/kernel/epapr_paravirt.c    | 28 ++++++++++++++++------------
 arch/powerpc/kernel/setup_32.c          |  4 +++-
 arch/powerpc/kernel/setup_64.c          |  3 +++
 4 files changed, 28 insertions(+), 13 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/epapr_hcalls.h b/arch/powerpc/include/asm/epapr_hcalls.h
index d3d634274d2c..86b0ac79990c 100644
--- a/arch/powerpc/include/asm/epapr_hcalls.h
+++ b/arch/powerpc/include/asm/epapr_hcalls.h
@@ -105,6 +105,12 @@
 extern bool epapr_paravirt_enabled;
 extern u32 epapr_hypercall_start[];
 
+#ifdef CONFIG_EPAPR_PARAVIRT
+int __init epapr_paravirt_early_init(void);
+#else
+static inline int epapr_paravirt_early_init(void) { return 0; }
+#endif
+
 /*
  * We use "uintptr_t" to define a register because it's guaranteed to be a
  * 32-bit integer on a 32-bit platform, and a 64-bit integer on a 64-bit
diff --git a/arch/powerpc/kernel/epapr_paravirt.c b/arch/powerpc/kernel/epapr_paravirt.c
index d44a571e45a7..6300c13bbde4 100644
--- a/arch/powerpc/kernel/epapr_paravirt.c
+++ b/arch/powerpc/kernel/epapr_paravirt.c
@@ -30,22 +30,20 @@ extern u32 epapr_ev_idle_start[];
 
 bool epapr_paravirt_enabled;
 
-static int __init epapr_paravirt_init(void)
+static int __init early_init_dt_scan_epapr(unsigned long node,
+					   const char *uname,
+					   int depth, void *data)
 {
-	struct device_node *hyper_node;
 	const u32 *insts;
-	int len, i;
+	unsigned long len;
+	int i;
 
-	hyper_node = of_find_node_by_path("/hypervisor");
-	if (!hyper_node)
-		return -ENODEV;
-
-	insts = of_get_property(hyper_node, "hcall-instructions", &len);
+	insts = of_get_flat_dt_prop(node, "hcall-instructions", &len);
 	if (!insts)
-		return -ENODEV;
+		return 0;
 
 	if (len % 4 || len > (4 * 4))
-		return -ENODEV;
+		return -1;
 
 	for (i = 0; i < (len / 4); i++) {
 		patch_instruction(epapr_hypercall_start + i, insts[i]);
@@ -55,13 +53,19 @@ static int __init epapr_paravirt_init(void)
 	}
 
 #if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
-	if (of_get_property(hyper_node, "has-idle", NULL))
+	if (of_get_flat_dt_prop(node, "has-idle", NULL))
 		ppc_md.power_save = epapr_ev_idle;
 #endif
 
 	epapr_paravirt_enabled = true;
 
+	return 1;
+}
+
+int __init epapr_paravirt_early_init(void)
+{
+	of_scan_flat_dt(early_init_dt_scan_epapr, NULL);
+
 	return 0;
 }
 
-early_initcall(epapr_paravirt_init);
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index a8f54ecb091f..a4bbcae72578 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -38,6 +38,7 @@
 #include <asm/serial.h>
 #include <asm/udbg.h>
 #include <asm/mmu_context.h>
+#include <asm/epapr_hcalls.h>
 
 #include "setup.h"
 
@@ -128,6 +129,8 @@ notrace void __init machine_init(u64 dt_ptr)
 	/* Do some early initialization based on the flat device tree */
 	early_init_devtree(__va(dt_ptr));
 
+	epapr_paravirt_early_init();
+
 	early_init_mmu();
 
 	probe_machine();
@@ -326,5 +329,4 @@ void __init setup_arch(char **cmdline_p)
 
 	/* Initialize the MMU context management stuff */
 	mmu_context_init();
-
 }
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 389fb8077cc9..f03770e0fc8d 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -66,6 +66,7 @@
 #include <asm/code-patching.h>
 #include <asm/kvm_ppc.h>
 #include <asm/hugetlb.h>
+#include <asm/epapr_hcalls.h>
 
 #include "setup.h"
 
@@ -215,6 +216,8 @@ void __init early_setup(unsigned long dt_ptr)
 	 */
 	early_init_devtree(__va(dt_ptr));
 
+	epapr_paravirt_early_init();
+
 	/* Now we know the logical id of our boot cpu, setup the paca. */
 	setup_paca(&paca[boot_cpuid]);
 	fixup_boot_paca();
-- 
cgit v1.2.3


From 5b63fee1fe5d10c397d740ffef4d576a196ed72d Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:18 +1000
Subject: powerpc: Align p_toc

p_toc is an 8 byte relative offset to the TOC that we place in the
text section. This means it is only 4 byte aligned where it should
be 8 byte aligned. Add an explicit alignment.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/head_64.S | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index b61363d557b5..3d11d8038dee 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -703,6 +703,7 @@ _GLOBAL(relative_toc)
 	mtlr	r0
 	blr
 
+.balign 8
 p_toc:	.llong	__toc_start + 0x8000 - 0b
 
 /*
-- 
cgit v1.2.3


From 230aef7a6a23b6166bd4003bfff5af23c9bd381f Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:19 +1000
Subject: powerpc: Handle unaligned ldbrx/stdbrx

Normally when we haven't implemented an alignment handler for
a load or store instruction the process will be terminated.

The alignment handler uses the DSISR (or a pseudo one) to locate
the right handler. Unfortunately ldbrx and stdbrx overlap lfs and
stfs so we incorrectly think ldbrx is an lfs and stdbrx is an
stfs.

This bug is particularly nasty - instead of terminating the
process we apply an incorrect fixup and continue on.

With more and more overlapping instructions we should stop
creating a pseudo DSISR and index using the instruction directly,
but for now add a special case to catch ldbrx/stdbrx.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/align.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index ee5b690a0bed..52e5758ea368 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -764,6 +764,16 @@ int fix_alignment(struct pt_regs *regs)
 	nb = aligninfo[instr].len;
 	flags = aligninfo[instr].flags;
 
+	/* ldbrx/stdbrx overlap lfs/stfs in the DSISR unfortunately */
+	if (IS_XFORM(instruction) && ((instruction >> 1) & 0x3ff) == 532) {
+		nb = 8;
+		flags = LD+SW;
+	} else if (IS_XFORM(instruction) &&
+		   ((instruction >> 1) & 0x3ff) == 660) {
+		nb = 8;
+		flags = ST+SW;
+	}
+
 	/* Byteswap little endian loads and stores */
 	swiz = 0;
 	if (regs->msr & MSR_LE) {
-- 
cgit v1.2.3


From b0d436c739b0d4afcdfe2e97d4d1ee41ea2db62e Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:24 +1000
Subject: powerpc: Fix a number of sparse warnings

Address some of the trivial sparse warnings in arch/powerpc.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/legacy_serial.c             | 2 +-
 arch/powerpc/kernel/pci-common.c                | 4 ++--
 arch/powerpc/kernel/pci_64.c                    | 2 +-
 arch/powerpc/kernel/setup_64.c                  | 4 ++--
 arch/powerpc/kernel/signal_64.c                 | 8 ++++----
 arch/powerpc/kernel/smp.c                       | 2 +-
 arch/powerpc/mm/hash_utils_64.c                 | 2 +-
 arch/powerpc/mm/subpage-prot.c                  | 4 ++--
 arch/powerpc/perf/core-book3s.c                 | 2 +-
 arch/powerpc/platforms/powernv/opal.c           | 2 +-
 arch/powerpc/platforms/pseries/lpar.c           | 2 +-
 arch/powerpc/platforms/pseries/pseries_energy.c | 4 ++--
 arch/powerpc/platforms/pseries/setup.c          | 2 +-
 13 files changed, 20 insertions(+), 20 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 0733b05eb856..af1c63fc7dac 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -99,7 +99,7 @@ static int __init add_legacy_port(struct device_node *np, int want_index,
 		legacy_serial_count = index + 1;
 
 	/* Check if there is a port who already claimed our slot */
-	if (legacy_serial_infos[index].np != 0) {
+	if (legacy_serial_infos[index].np != NULL) {
 		/* if we still have some room, move it, else override */
 		if (legacy_serial_count < MAX_LEGACY_SERIAL_PORTS) {
 			printk(KERN_DEBUG "Moved legacy port %d -> %d\n",
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 7d22a675fe1a..22fe40140e43 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -306,7 +306,7 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
 	unsigned long io_offset = 0;
 	int i, res_bit;
 
-	if (hose == 0)
+	if (hose == NULL)
 		return NULL;		/* should never happen */
 
 	/* If memory, add on the PCI bridge address offset */
@@ -1578,7 +1578,7 @@ fake_pci_bus(struct pci_controller *hose, int busnr)
 {
 	static struct pci_bus bus;
 
-	if (hose == 0) {
+	if (hose == NULL) {
 		printk(KERN_ERR "Can't find hose for PCI bus %d!\n", busnr);
 	}
 	bus.number = busnr;
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 2e8629654ca8..cdf5aa1411bf 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -109,7 +109,7 @@ int pcibios_unmap_io_space(struct pci_bus *bus)
 	hose = pci_bus_to_host(bus);
 
 	/* Check if we have IOs allocated */
-	if (hose->io_base_alloc == 0)
+	if (hose->io_base_alloc == NULL)
 		return 0;
 
 	pr_debug("IO unmapping for PHB %s\n", hose->dn->full_name);
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index f03770e0fc8d..79ba9b77fe72 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -325,7 +325,7 @@ static void __init initialize_cache_info(void)
 							 NULL);
 			if (lsizep != NULL)
 				lsize = *lsizep;
-			if (sizep == 0 || lsizep == 0)
+			if (sizep == NULL || lsizep == NULL)
 				DBG("Argh, can't find dcache properties ! "
 				    "sizep: %p, lsizep: %p\n", sizep, lsizep);
 
@@ -347,7 +347,7 @@ static void __init initialize_cache_info(void)
 							 NULL);
 			if (lsizep != NULL)
 				lsize = *lsizep;
-			if (sizep == 0 || lsizep == 0)
+			if (sizep == NULL || lsizep == NULL)
 				DBG("Argh, can't find icache properties ! "
 				    "sizep: %p, lsizep: %p\n", sizep, lsizep);
 
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index 887e99d85bc2..cbd26928e04d 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -346,13 +346,13 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
 	if (v_regs && !access_ok(VERIFY_READ, v_regs, 34 * sizeof(vector128)))
 		return -EFAULT;
 	/* Copy 33 vec registers (vr0..31 and vscr) from the stack */
-	if (v_regs != 0 && (msr & MSR_VEC) != 0)
+	if (v_regs != NULL && (msr & MSR_VEC) != 0)
 		err |= __copy_from_user(current->thread.vr, v_regs,
 					33 * sizeof(vector128));
 	else if (current->thread.used_vr)
 		memset(current->thread.vr, 0, 33 * sizeof(vector128));
 	/* Always get VRSAVE back */
-	if (v_regs != 0)
+	if (v_regs != NULL)
 		err |= __get_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
 	else
 		current->thread.vrsave = 0;
@@ -463,7 +463,7 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
 				    tm_v_regs, 34 * sizeof(vector128)))
 		return -EFAULT;
 	/* Copy 33 vec registers (vr0..31 and vscr) from the stack */
-	if (v_regs != 0 && tm_v_regs != 0 && (msr & MSR_VEC) != 0) {
+	if (v_regs != NULL && tm_v_regs != NULL && (msr & MSR_VEC) != 0) {
 		err |= __copy_from_user(current->thread.vr, v_regs,
 					33 * sizeof(vector128));
 		err |= __copy_from_user(current->thread.transact_vr, tm_v_regs,
@@ -474,7 +474,7 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
 		memset(current->thread.transact_vr, 0, 33 * sizeof(vector128));
 	}
 	/* Always get VRSAVE back */
-	if (v_regs != 0 && tm_v_regs != 0) {
+	if (v_regs != NULL && tm_v_regs != NULL) {
 		err |= __get_user(current->thread.vrsave,
 				  (u32 __user *)&v_regs[33]);
 		err |= __get_user(current->thread.transact_vrsave,
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 38b0ba65a735..9882240020c0 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -172,7 +172,7 @@ int smp_request_message_ipi(int virq, int msg)
 #endif
 	err = request_irq(virq, smp_ipi_action[msg],
 			  IRQF_PERCPU | IRQF_NO_THREAD | IRQF_NO_SUSPEND,
-			  smp_ipi_name[msg], 0);
+			  smp_ipi_name[msg], NULL);
 	WARN(err < 0, "unable to request_irq %d for %s (rc %d)\n",
 		virq, smp_ipi_name[msg], err);
 
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 6ecc38bd5b24..bde8b5589755 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -907,7 +907,7 @@ static int subpage_protection(struct mm_struct *mm, unsigned long ea)
 
 	if (ea >= spt->maxaddr)
 		return 0;
-	if (ea < 0x100000000) {
+	if (ea < 0x100000000UL) {
 		/* addresses below 4GB use spt->low_prot */
 		sbpm = spt->low_prot;
 	} else {
diff --git a/arch/powerpc/mm/subpage-prot.c b/arch/powerpc/mm/subpage-prot.c
index aa74acb0fdfc..a770df2dae70 100644
--- a/arch/powerpc/mm/subpage-prot.c
+++ b/arch/powerpc/mm/subpage-prot.c
@@ -105,7 +105,7 @@ static void subpage_prot_clear(unsigned long addr, unsigned long len)
 		limit = spt->maxaddr;
 	for (; addr < limit; addr = next) {
 		next = pmd_addr_end(addr, limit);
-		if (addr < 0x100000000) {
+		if (addr < 0x100000000UL) {
 			spm = spt->low_prot;
 		} else {
 			spm = spt->protptrs[addr >> SBP_L3_SHIFT];
@@ -219,7 +219,7 @@ long sys_subpage_prot(unsigned long addr, unsigned long len, u32 __user *map)
 	for (limit = addr + len; addr < limit; addr = next) {
 		next = pmd_addr_end(addr, limit);
 		err = -ENOMEM;
-		if (addr < 0x100000000) {
+		if (addr < 0x100000000UL) {
 			spm = spt->low_prot;
 		} else {
 			spm = spt->protptrs[addr >> SBP_L3_SHIFT];
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index eeae308cf982..29b89e863d7c 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -24,7 +24,7 @@
 #define BHRB_MAX_ENTRIES	32
 #define BHRB_TARGET		0x0000000000000002
 #define BHRB_PREDICTION		0x0000000000000001
-#define BHRB_EA			0xFFFFFFFFFFFFFFFC
+#define BHRB_EA			0xFFFFFFFFFFFFFFFCUL
 
 struct cpu_hw_events {
 	int n_events;
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 106301fd2fa5..7c253469f23b 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -422,7 +422,7 @@ void opal_shutdown(void)
 
 	for (i = 0; i < opal_irq_count; i++) {
 		if (opal_irqs[i])
-			free_irq(opal_irqs[i], 0);
+			free_irq(opal_irqs[i], NULL);
 		opal_irqs[i] = 0;
 	}
 }
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 8bad880bd177..60b6f4e8d63d 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -724,7 +724,7 @@ int h_get_mpp(struct hvcall_mpp_data *mpp_data)
 
 	mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff;
 	mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff;
-	mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffff;
+	mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL;
 
 	mpp_data->pool_size = retbuf[4];
 	mpp_data->loan_request = retbuf[5];
diff --git a/arch/powerpc/platforms/pseries/pseries_energy.c b/arch/powerpc/platforms/pseries/pseries_energy.c
index a91e6dadda2c..92767791f93b 100644
--- a/arch/powerpc/platforms/pseries/pseries_energy.c
+++ b/arch/powerpc/platforms/pseries/pseries_energy.c
@@ -108,8 +108,8 @@ err:
  * energy consumption.
  */
 
-#define FLAGS_MODE1	0x004E200000080E01
-#define FLAGS_MODE2	0x004E200000080401
+#define FLAGS_MODE1	0x004E200000080E01UL
+#define FLAGS_MODE2	0x004E200000080401UL
 #define FLAGS_ACTIVATE  0x100
 
 static ssize_t get_best_energy_list(char *page, int activate)
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index c11c8238797c..b19cd8334630 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -183,7 +183,7 @@ static void __init pseries_mpic_init_IRQ(void)
 	np = of_find_node_by_path("/");
 	naddr = of_n_addr_cells(np);
 	opprop = of_get_property(np, "platform-open-pic", &opplen);
-	if (opprop != 0) {
+	if (opprop != NULL) {
 		openpic_addr = of_read_number(opprop, naddr);
 		printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 	}
-- 
cgit v1.2.3


From 0c69f9c52c474ccd1cade27c7be5f8ab830cdc3a Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:25 +1000
Subject: powerpc/pci: Don't use bitfield for force_32bit_msi

Fix a sparse warning about force_32bit_msi being a one bit bitfield.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/pci-bridge.h | 2 +-
 arch/powerpc/kernel/pci_64.c          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 32d0d2018faf..4ca90a39d6d0 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -159,7 +159,7 @@ struct pci_dn {
 
 	int	pci_ext_config_space;	/* for pci devices */
 
-	int	force_32bit_msi:1;
+	bool	force_32bit_msi;
 
 	struct	pci_dev *pcidev;	/* back-pointer to the pci device */
 #ifdef CONFIG_EEH
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index cdf5aa1411bf..a9e311f7a9dd 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -272,7 +272,7 @@ static void quirk_radeon_32bit_msi(struct pci_dev *dev)
 	struct pci_dn *pdn = pci_get_pdn(dev);
 
 	if (pdn)
-		pdn->force_32bit_msi = 1;
+		pdn->force_32bit_msi = true;
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x68f2, quirk_radeon_32bit_msi);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0xaa68, quirk_radeon_32bit_msi);
-- 
cgit v1.2.3


From f13c13a005127b5dc5daaca190277a062d946e63 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:26 +1000
Subject: powerpc: Stop using non-architected shared_proc field in lppaca

Although the shared_proc field in the lppaca works today, it is
not architected. A shared processor partition will always have a non
zero yield_count so use that instead. Create a wrapper so users
don't have to know about the details.

In order for older kernels to continue to work on KVM we need
to set the shared_proc bit. While here, remove the ugly bitfield.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/lppaca.h               | 18 ++++++++++++++----
 arch/powerpc/include/asm/spinlock.h             |  2 +-
 arch/powerpc/kernel/lparcfg.c                   |  5 +++--
 arch/powerpc/kvm/book3s_hv.c                    |  2 +-
 arch/powerpc/mm/numa.c                          |  2 +-
 arch/powerpc/platforms/pseries/hotplug-cpu.c    |  4 ++--
 arch/powerpc/platforms/pseries/processor_idle.c |  2 +-
 7 files changed, 23 insertions(+), 12 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h
index 9b12f88d4adb..bc8def08d5d8 100644
--- a/arch/powerpc/include/asm/lppaca.h
+++ b/arch/powerpc/include/asm/lppaca.h
@@ -50,10 +50,8 @@ struct lppaca {
 
 	u32	desc;			/* Eye catcher 0xD397D781 */
 	u16	size;			/* Size of this struct */
-	u16	reserved1;
-	u16	reserved2:14;
-	u8	shared_proc:1;		/* Shared processor indicator */
-	u8	secondary_thread:1;	/* Secondary thread indicator */
+	u8	reserved1[3];
+	u8	__old_status;		/* Old status, including shared proc */
 	u8	reserved3[14];
 	volatile u32 dyn_hw_node_id;	/* Dynamic hardware node id */
 	volatile u32 dyn_hw_proc_id;	/* Dynamic hardware proc id */
@@ -107,6 +105,18 @@ extern struct lppaca lppaca[];
 
 #define lppaca_of(cpu)	(*paca[cpu].lppaca_ptr)
 
+/*
+ * Old kernels used a reserved bit in the VPA to determine if it was running
+ * in shared processor mode. New kernels look for a non zero yield count
+ * but KVM still needs to set the bit to keep the old stuff happy.
+ */
+#define LPPACA_OLD_SHARED_PROC		2
+
+static inline bool lppaca_shared_proc(struct lppaca *l)
+{
+	return l->yield_count != 0;
+}
+
 /*
  * SLB shadow buffer structure as defined in the PAPR.  The save_area
  * contains adjacent ESID and VSID pairs for each shadowed SLB.  The
diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
index 5b23f910ee57..7c345b6518db 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++ b/arch/powerpc/include/asm/spinlock.h
@@ -96,7 +96,7 @@ static inline int arch_spin_trylock(arch_spinlock_t *lock)
 
 #if defined(CONFIG_PPC_SPLPAR)
 /* We only yield to the hypervisor if we are in shared processor mode */
-#define SHARED_PROCESSOR (local_paca->lppaca_ptr->shared_proc)
+#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr))
 extern void __spin_yield(arch_spinlock_t *lock);
 extern void __rw_yield(arch_rwlock_t *lock);
 #else /* SPLPAR */
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index d92f3871e9cf..e6024c2ed5c7 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -165,7 +165,7 @@ static void parse_ppp_data(struct seq_file *m)
 	           ppp_data.active_system_procs);
 
 	/* pool related entries are appropriate for shared configs */
-	if (lppaca_of(0).shared_proc) {
+	if (lppaca_shared_proc(get_lppaca())) {
 		unsigned long pool_idle_time, pool_procs;
 
 		seq_printf(m, "pool=%d\n", ppp_data.pool_num);
@@ -473,7 +473,8 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
 	seq_printf(m, "partition_potential_processors=%d\n",
 		   partition_potential_processors);
 
-	seq_printf(m, "shared_processor_mode=%d\n", lppaca_of(0).shared_proc);
+	seq_printf(m, "shared_processor_mode=%d\n",
+		   lppaca_shared_proc(get_lppaca()));
 
 	seq_printf(m, "slb_size=%d\n", mmu_slb_size);
 
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 2efa9dde741a..cf39bf4f3c7d 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -217,7 +217,7 @@ struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
 
 static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
 {
-	vpa->shared_proc = 1;
+	vpa->__old_status |= LPPACA_OLD_SHARED_PROC;
 	vpa->yield_count = 1;
 }
 
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 5850798826cd..501e32ca43b4 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -1609,7 +1609,7 @@ int start_topology_update(void)
 #endif
 		}
 	} else if (firmware_has_feature(FW_FEATURE_VPHN) &&
-		   get_lppaca()->shared_proc) {
+		   lppaca_shared_proc(get_lppaca())) {
 		if (!vphn_enabled) {
 			prrn_enabled = 0;
 			vphn_enabled = 1;
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 217ca5c75b20..1e490cf63a0d 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -123,7 +123,7 @@ static void pseries_mach_cpu_die(void)
 		cede_latency_hint = 2;
 
 		get_lppaca()->idle = 1;
-		if (!get_lppaca()->shared_proc)
+		if (!lppaca_shared_proc(get_lppaca()))
 			get_lppaca()->donate_dedicated_cpu = 1;
 
 		while (get_preferred_offline_state(cpu) == CPU_STATE_INACTIVE) {
@@ -137,7 +137,7 @@ static void pseries_mach_cpu_die(void)
 
 		local_irq_disable();
 
-		if (!get_lppaca()->shared_proc)
+		if (!lppaca_shared_proc(get_lppaca()))
 			get_lppaca()->donate_dedicated_cpu = 0;
 		get_lppaca()->idle = 0;
 
diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c
index 4644efa06941..92db881be27e 100644
--- a/arch/powerpc/platforms/pseries/processor_idle.c
+++ b/arch/powerpc/platforms/pseries/processor_idle.c
@@ -308,7 +308,7 @@ static int pseries_idle_probe(void)
 		return -EPERM;
 	}
 
-	if (get_lppaca()->shared_proc)
+	if (lppaca_shared_proc(get_lppaca()))
 		cpuidle_state_table = shared_states;
 	else
 		cpuidle_state_table = dedicated_states;
-- 
cgit v1.2.3


From abb29c3bb13c7b747fae18b9c63b660529ccc612 Mon Sep 17 00:00:00 2001
From: Kevin Hao <haokexin@gmail.com>
Date: Tue, 6 Aug 2013 18:23:30 +0800
Subject: powerpc: Move the testing of CPU_FTR_COHERENT_ICACHE into
 __flush_icache_range

In function flush_icache_range(), we use cpu_has_feature() to test
the feature bit of CPU_FTR_COHERENT_ICACHE. But this seems not optimal
for two reasons:
 a) For ppc32, the function __flush_icache_range() already do this
    check with the macro END_FTR_SECTION_IFSET.
 b) Compare with the cpu_has_feature(), the method of using macro
    END_FTR_SECTION_IFSET will not introduce any runtime overhead.

[And while at it, add the missing required isync] -- BenH

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/cacheflush.h | 3 +--
 arch/powerpc/kernel/misc_32.S         | 1 +
 arch/powerpc/kernel/misc_64.S         | 4 +++-
 3 files changed, 5 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/cacheflush.h b/arch/powerpc/include/asm/cacheflush.h
index b843e35122e8..60b620d64ac9 100644
--- a/arch/powerpc/include/asm/cacheflush.h
+++ b/arch/powerpc/include/asm/cacheflush.h
@@ -35,8 +35,7 @@ extern void __flush_disable_L1(void);
 extern void __flush_icache_range(unsigned long, unsigned long);
 static inline void flush_icache_range(unsigned long start, unsigned long stop)
 {
-	if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
-		__flush_icache_range(start, stop);
+	__flush_icache_range(start, stop);
 }
 
 extern void flush_icache_user_range(struct vm_area_struct *vma,
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index e469f30e6eeb..1722a2be66ca 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -329,6 +329,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_UNIFIED_ID_CACHE)
  */
 _KPROBE(__flush_icache_range)
 BEGIN_FTR_SECTION
+	isync
 	blr				/* for 601, do nothing */
 END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
 	li	r5,L1_CACHE_BYTES-1
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 6820e45f557b..74d87f117566 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -68,7 +68,9 @@ PPC64_CACHES:
  */
 
 _KPROBE(__flush_icache_range)
-
+BEGIN_FTR_SECTION
+	blr
+END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
 /*
  * Flush the data cache to memory 
  * 
-- 
cgit v1.2.3


From 3b04c300070f5ee2608b092e98aa121b963cec26 Mon Sep 17 00:00:00 2001
From: Kevin Hao <haokexin@gmail.com>
Date: Tue, 6 Aug 2013 18:23:31 +0800
Subject: powerpc: Remove the symbol __flush_icache_range

And now the function flush_icache_range() is just a wrapper which
only invoke the function __flush_icache_range() directly. So we
don't have reason to keep it anymore.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/cacheflush.h | 7 +------
 arch/powerpc/kernel/misc_32.S         | 2 +-
 arch/powerpc/kernel/misc_64.S         | 2 +-
 arch/powerpc/kernel/ppc_ksyms.c       | 1 -
 4 files changed, 3 insertions(+), 9 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/cacheflush.h b/arch/powerpc/include/asm/cacheflush.h
index 60b620d64ac9..5b9312220e84 100644
--- a/arch/powerpc/include/asm/cacheflush.h
+++ b/arch/powerpc/include/asm/cacheflush.h
@@ -32,12 +32,7 @@ extern void flush_dcache_page(struct page *page);
 
 extern void __flush_disable_L1(void);
 
-extern void __flush_icache_range(unsigned long, unsigned long);
-static inline void flush_icache_range(unsigned long start, unsigned long stop)
-{
-	__flush_icache_range(start, stop);
-}
-
+extern void flush_icache_range(unsigned long, unsigned long);
 extern void flush_icache_user_range(struct vm_area_struct *vma,
 				    struct page *page, unsigned long addr,
 				    int len);
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 1722a2be66ca..777d999f563b 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -327,7 +327,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_UNIFIED_ID_CACHE)
  *
  * flush_icache_range(unsigned long start, unsigned long stop)
  */
-_KPROBE(__flush_icache_range)
+_KPROBE(flush_icache_range)
 BEGIN_FTR_SECTION
 	isync
 	blr				/* for 601, do nothing */
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 74d87f117566..a781566d3993 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -67,7 +67,7 @@ PPC64_CACHES:
  *   flush all bytes from start through stop-1 inclusive
  */
 
-_KPROBE(__flush_icache_range)
+_KPROBE(flush_icache_range)
 BEGIN_FTR_SECTION
 	blr
 END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index c29666586998..380a6f9fa7f8 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -111,7 +111,6 @@ EXPORT_SYMBOL(giveup_spe);
 #ifndef CONFIG_PPC64
 EXPORT_SYMBOL(flush_instruction_cache);
 #endif
-EXPORT_SYMBOL(__flush_icache_range);
 EXPORT_SYMBOL(flush_dcache_range);
 
 #ifdef CONFIG_SMP
-- 
cgit v1.2.3


From 3cd852502316d42e3e75859e92d9f0a952bb55a2 Mon Sep 17 00:00:00 2001
From: Andy Fleming <afleming@freescale.com>
Date: Mon, 5 Aug 2013 14:58:34 -0500
Subject: powerpc: Add smp_generic_cpu_bootable

Cell and PSeries both implemented their own versions of a
cpu_bootable smp_op which do the same thing (well, the PSeries
one has support for more than 2 threads). Copy the PSeries one
to generic code, and rename it smp_generic_cpu_bootable.

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/smp.h |  2 ++
 arch/powerpc/kernel/smp.c      | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h
index 48cfc858abd6..9a5e71b0aea4 100644
--- a/arch/powerpc/include/asm/smp.h
+++ b/arch/powerpc/include/asm/smp.h
@@ -186,6 +186,8 @@ extern int smt_enabled_at_boot;
 extern int smp_mpic_probe(void);
 extern void smp_mpic_setup_cpu(int cpu);
 extern int smp_generic_kick_cpu(int nr);
+extern int smp_generic_cpu_bootable(unsigned int nr);
+
 
 extern void smp_generic_give_timebase(void);
 extern void smp_generic_take_timebase(void);
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 9882240020c0..e69211293789 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -81,6 +81,28 @@ int smt_enabled_at_boot = 1;
 
 static void (*crash_ipi_function_ptr)(struct pt_regs *) = NULL;
 
+/*
+ * Returns 1 if the specified cpu should be brought up during boot.
+ * Used to inhibit booting threads if they've been disabled or
+ * limited on the command line
+ */
+int smp_generic_cpu_bootable(unsigned int nr)
+{
+	/* Special case - we inhibit secondary thread startup
+	 * during boot if the user requests it.
+	 */
+	if (system_state == SYSTEM_BOOTING && cpu_has_feature(CPU_FTR_SMT)) {
+		if (!smt_enabled_at_boot && cpu_thread_in_core(nr) != 0)
+			return 0;
+		if (smt_enabled_at_boot
+		    && cpu_thread_in_core(nr) >= smt_enabled_at_boot)
+			return 0;
+	}
+
+	return 1;
+}
+
+
 #ifdef CONFIG_PPC64
 int smp_generic_kick_cpu(int nr)
 {
-- 
cgit v1.2.3


From 408a7e08b2112faf687dd629212e42998a7dbe48 Mon Sep 17 00:00:00 2001
From: Paul Mackerras <paulus@samba.org>
Date: Mon, 5 Aug 2013 14:13:16 +1000
Subject: powerpc: Fix VRSAVE handling

Since 2002, the kernel has not saved VRSAVE on exception entry and
restored it on exit; rather, VRSAVE gets context-switched in _switch.
This means that when executing in process context in the kernel, the
userspace VRSAVE value is live in the VRSAVE register.

However, the signal code assumes that current->thread.vrsave holds
the current VRSAVE value, which is incorrect.  Therefore, this
commit changes it to use the actual VRSAVE register instead.  (It
still uses current->thread.vrsave as a temporary location to store
it in, as __get_user and __put_user can only transfer to/from a
variable, not an SPR.)

This also modifies the transactional memory code to save and restore
VRSAVE regardless of whether VMX is enabled in the MSR.  This is
because accesses to VRSAVE are not controlled by the MSR.VEC bit,
but can happen at any time.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/signal_32.c | 9 +++++++++
 arch/powerpc/kernel/signal_64.c | 8 ++++++++
 arch/powerpc/kernel/tm.S        | 4 ++--
 3 files changed, 19 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 0f83122e6676..bebdf1a1a540 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -436,7 +436,10 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
 	 * use altivec. Since VSCR only contains 32 bits saved in the least
 	 * significant bits of a vector, we "cheat" and stuff VRSAVE in the
 	 * most significant bits of that same vector. --BenH
+	 * Note that the current VRSAVE value is in the SPR at this point.
 	 */
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		current->thread.vrsave = mfspr(SPRN_VRSAVE);
 	if (__put_user(current->thread.vrsave, (u32 __user *)&frame->mc_vregs[32]))
 		return 1;
 #endif /* CONFIG_ALTIVEC */
@@ -557,6 +560,8 @@ static int save_tm_user_regs(struct pt_regs *regs,
 	 * significant bits of a vector, we "cheat" and stuff VRSAVE in the
 	 * most significant bits of that same vector. --BenH
 	 */
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		current->thread.vrsave = mfspr(SPRN_VRSAVE);
 	if (__put_user(current->thread.vrsave,
 		       (u32 __user *)&frame->mc_vregs[32]))
 		return 1;
@@ -696,6 +701,8 @@ static long restore_user_regs(struct pt_regs *regs,
 	/* Always get VRSAVE back */
 	if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
 		return 1;
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		mtspr(SPRN_VRSAVE, current->thread.vrsave);
 #endif /* CONFIG_ALTIVEC */
 	if (copy_fpr_from_user(current, &sr->mc_fregs))
 		return 1;
@@ -809,6 +816,8 @@ static long restore_tm_user_regs(struct pt_regs *regs,
 	    __get_user(current->thread.transact_vrsave,
 		       (u32 __user *)&tm_sr->mc_vregs[32]))
 		return 1;
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		mtspr(SPRN_VRSAVE, current->thread.vrsave);
 #endif /* CONFIG_ALTIVEC */
 
 	regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1);
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index cbd26928e04d..d0106b8a7484 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -114,6 +114,8 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
 	/* We always copy to/from vrsave, it's 0 if we don't have or don't
 	 * use altivec.
 	 */
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		current->thread.vrsave = mfspr(SPRN_VRSAVE);
 	err |= __put_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
 #else /* CONFIG_ALTIVEC */
 	err |= __put_user(0, &sc->v_regs);
@@ -217,6 +219,8 @@ static long setup_tm_sigcontexts(struct sigcontext __user *sc,
 	/* We always copy to/from vrsave, it's 0 if we don't have or don't
 	 * use altivec.
 	 */
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		current->thread.vrsave = mfspr(SPRN_VRSAVE);
 	err |= __put_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
 	if (msr & MSR_VEC)
 		err |= __put_user(current->thread.transact_vrsave,
@@ -356,6 +360,8 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
 		err |= __get_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
 	else
 		current->thread.vrsave = 0;
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		mtspr(SPRN_VRSAVE, current->thread.vrsave);
 #endif /* CONFIG_ALTIVEC */
 	/* restore floating point */
 	err |= copy_fpr_from_user(current, &sc->fp_regs);
@@ -484,6 +490,8 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
 		current->thread.vrsave = 0;
 		current->thread.transact_vrsave = 0;
 	}
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		mtspr(SPRN_VRSAVE, current->thread.vrsave);
 #endif /* CONFIG_ALTIVEC */
 	/* restore floating point */
 	err |= copy_fpr_from_user(current, &sc->fp_regs);
diff --git a/arch/powerpc/kernel/tm.S b/arch/powerpc/kernel/tm.S
index 51be8fb24803..e2145b222f83 100644
--- a/arch/powerpc/kernel/tm.S
+++ b/arch/powerpc/kernel/tm.S
@@ -155,10 +155,10 @@ _GLOBAL(tm_reclaim)
 	mfvscr	vr0
 	li	r6, THREAD_TRANSACT_VSCR
 	stvx	vr0, r3, r6
+dont_backup_vec:
 	mfspr	r0, SPRN_VRSAVE
 	std	r0, THREAD_TRANSACT_VRSAVE(r3)
 
-dont_backup_vec:
 	andi.	r0, r4, MSR_FP
 	beq	dont_backup_fp
 
@@ -331,11 +331,11 @@ _GLOBAL(tm_recheckpoint)
 	lvx	vr0, r3, r5
 	mtvscr	vr0
 	REST_32VRS(0, r5, r3)			/* r5 scratch, r3 THREAD ptr */
+dont_restore_vec:
 	ld	r5, THREAD_VRSAVE(r3)
 	mtspr	SPRN_VRSAVE, r5
 #endif
 
-dont_restore_vec:
 	andi.	r0, r4, MSR_FP
 	beq	dont_restore_fp
 
-- 
cgit v1.2.3


From 1a85d66bcc90e2cbdf04f70d6586b82532142e85 Mon Sep 17 00:00:00 2001
From: Gavin Shan <shangw@linux.vnet.ibm.com>
Date: Wed, 31 Jul 2013 16:43:56 +0800
Subject: powerpc/pci: Remove duplicate check in pcibios_fixup_bus()

pci_read_bridge_bases() already checks if the PCI bus is root
bus or not, so we needn't do same check in pcibios_fixup_bus()
and just remove it.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/pci-common.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 22fe40140e43..ec6c9db7b392 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1055,8 +1055,7 @@ void pcibios_fixup_bus(struct pci_bus *bus)
 	 * bases. This is -not- called when generating the PCI tree from
 	 * the OF device-tree.
 	 */
-	if (bus->self != NULL)
-		pci_read_bridge_bases(bus);
+	pci_read_bridge_bases(bus);
 
 	/* Now fixup the bus bus */
 	pcibios_setup_bus_self(bus);
-- 
cgit v1.2.3


From 7191b615759ec10cab9eea43be5ecc42cda82364 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Thu, 25 Jul 2013 12:12:32 +1000
Subject: powerpc/pmac: Early debug output on screen on 64-bit macs

We have a bunch of CONFIG_PPC_EARLY_DEBUG_* options that are intended
for bringup/debug only. They hard wire a machine specific udbg backend
very early on (before we even probe the platform), and use whatever
tricks are available on each machine/cpu to be able to get some kind
of output out there early on.

So far, on powermac with no serial ports, we have CONFIG_PPC_EARLY_DEBUG_BOOTX
to use the low-level btext engine on the screen, but it doesn't do much, at
least on 64-bit. It only really gets enabled after the platform has been
probed and the MMU enabled.

This adds a way to enable it much earlier. From prom_init.c (while still
running with Open Firmware), we grab the screen details and set things up
using the physical address of the frame buffer.

Then btext itself uses the "rm_ci" feature of the 970 processor (Real
Mode Cache Inhibited) to access it while in real mode.

We need to do a little bit of reorg of the btext code to inline things
better, in order to limit how much we touch memory while in this mode as
the consequences might be ... interesting.

This successfully allowed me to debug problems early on with the G5
(related to gold being broken vs. ppc64 kernels).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/btext.h       |   1 +
 arch/powerpc/kernel/btext.c            | 254 ++++++++++++++++++---------------
 arch/powerpc/kernel/misc_64.S          |  31 ++++
 arch/powerpc/kernel/prom_init.c        |  16 +++
 arch/powerpc/kernel/prom_init_check.sh |   3 +-
 arch/powerpc/kernel/setup_64.c         |  14 +-
 6 files changed, 202 insertions(+), 117 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/btext.h b/arch/powerpc/include/asm/btext.h
index 906f46e31006..89fc382648bc 100644
--- a/arch/powerpc/include/asm/btext.h
+++ b/arch/powerpc/include/asm/btext.h
@@ -13,6 +13,7 @@ extern void btext_update_display(unsigned long phys, int width, int height,
 extern void btext_setup_display(int width, int height, int depth, int pitch,
 				unsigned long address);
 extern void btext_prepare_BAT(void);
+extern void btext_map(void);
 extern void btext_unmap(void);
 
 extern void btext_drawchar(char c);
diff --git a/arch/powerpc/kernel/btext.c b/arch/powerpc/kernel/btext.c
index ac8f52732fde..0428992fdb4b 100644
--- a/arch/powerpc/kernel/btext.c
+++ b/arch/powerpc/kernel/btext.c
@@ -25,11 +25,6 @@
 static void scrollscreen(void);
 #endif
 
-static void draw_byte(unsigned char c, long locX, long locY);
-static void draw_byte_32(unsigned char *bits, unsigned int *base, int rb);
-static void draw_byte_16(unsigned char *bits, unsigned int *base, int rb);
-static void draw_byte_8(unsigned char *bits, unsigned int *base, int rb);
-
 #define __force_data __attribute__((__section__(".data")))
 
 static int g_loc_X __force_data;
@@ -52,6 +47,26 @@ static unsigned char vga_font[cmapsz];
 int boot_text_mapped __force_data = 0;
 int force_printk_to_btext = 0;
 
+extern void rmci_on(void);
+extern void rmci_off(void);
+
+static inline void rmci_maybe_on(void)
+{
+#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
+	if (!(mfmsr() & MSR_DR))
+		rmci_on();
+#endif
+}
+
+static inline void rmci_maybe_off(void)
+{
+#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
+	if (!(mfmsr() & MSR_DR))
+		rmci_off();
+#endif
+}
+
+
 #ifdef CONFIG_PPC32
 /* Calc BAT values for mapping the display and store them
  * in disp_BAT.  Those values are then used from head.S to map
@@ -134,7 +149,7 @@ void __init btext_unmap(void)
  *    changes.
  */
 
-static void map_boot_text(void)
+void btext_map(void)
 {
 	unsigned long base, offset, size;
 	unsigned char *vbase;
@@ -209,7 +224,7 @@ int btext_initialize(struct device_node *np)
 	dispDeviceRect[2] = width;
 	dispDeviceRect[3] = height;
 
-	map_boot_text();
+	btext_map();
 
 	return 0;
 }
@@ -283,7 +298,7 @@ void btext_update_display(unsigned long phys, int width, int height,
 		iounmap(logicalDisplayBase);
 		boot_text_mapped = 0;
 	}
-	map_boot_text();
+	btext_map();
 	g_loc_X = 0;
 	g_loc_Y = 0;
 	g_max_loc_X = width / 8;
@@ -298,6 +313,7 @@ void btext_clearscreen(void)
 					(dispDeviceDepth >> 3)) >> 2;
 	int i,j;
 
+	rmci_maybe_on();
 	for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1]); i++)
 	{
 		unsigned int *ptr = base;
@@ -305,6 +321,7 @@ void btext_clearscreen(void)
 			*(ptr++) = 0;
 		base += (dispDeviceRowBytes >> 2);
 	}
+	rmci_maybe_off();
 }
 
 void btext_flushscreen(void)
@@ -355,6 +372,8 @@ static void scrollscreen(void)
 				   (dispDeviceDepth >> 3)) >> 2;
 	int i,j;
 
+	rmci_maybe_on();
+
 	for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1] - 16); i++)
 	{
 		unsigned int *src_ptr = src;
@@ -371,9 +390,116 @@ static void scrollscreen(void)
 			*(dst_ptr++) = 0;
 		dst += (dispDeviceRowBytes >> 2);
 	}
+
+	rmci_maybe_off();
 }
 #endif /* ndef NO_SCROLL */
 
+static unsigned int expand_bits_8[16] = {
+	0x00000000,
+	0x000000ff,
+	0x0000ff00,
+	0x0000ffff,
+	0x00ff0000,
+	0x00ff00ff,
+	0x00ffff00,
+	0x00ffffff,
+	0xff000000,
+	0xff0000ff,
+	0xff00ff00,
+	0xff00ffff,
+	0xffff0000,
+	0xffff00ff,
+	0xffffff00,
+	0xffffffff
+};
+
+static unsigned int expand_bits_16[4] = {
+	0x00000000,
+	0x0000ffff,
+	0xffff0000,
+	0xffffffff
+};
+
+
+static void draw_byte_32(unsigned char *font, unsigned int *base, int rb)
+{
+	int l, bits;
+	int fg = 0xFFFFFFFFUL;
+	int bg = 0x00000000UL;
+
+	for (l = 0; l < 16; ++l)
+	{
+		bits = *font++;
+		base[0] = (-(bits >> 7) & fg) ^ bg;
+		base[1] = (-((bits >> 6) & 1) & fg) ^ bg;
+		base[2] = (-((bits >> 5) & 1) & fg) ^ bg;
+		base[3] = (-((bits >> 4) & 1) & fg) ^ bg;
+		base[4] = (-((bits >> 3) & 1) & fg) ^ bg;
+		base[5] = (-((bits >> 2) & 1) & fg) ^ bg;
+		base[6] = (-((bits >> 1) & 1) & fg) ^ bg;
+		base[7] = (-(bits & 1) & fg) ^ bg;
+		base = (unsigned int *) ((char *)base + rb);
+	}
+}
+
+static inline void draw_byte_16(unsigned char *font, unsigned int *base, int rb)
+{
+	int l, bits;
+	int fg = 0xFFFFFFFFUL;
+	int bg = 0x00000000UL;
+	unsigned int *eb = (int *)expand_bits_16;
+
+	for (l = 0; l < 16; ++l)
+	{
+		bits = *font++;
+		base[0] = (eb[bits >> 6] & fg) ^ bg;
+		base[1] = (eb[(bits >> 4) & 3] & fg) ^ bg;
+		base[2] = (eb[(bits >> 2) & 3] & fg) ^ bg;
+		base[3] = (eb[bits & 3] & fg) ^ bg;
+		base = (unsigned int *) ((char *)base + rb);
+	}
+}
+
+static inline void draw_byte_8(unsigned char *font, unsigned int *base, int rb)
+{
+	int l, bits;
+	int fg = 0x0F0F0F0FUL;
+	int bg = 0x00000000UL;
+	unsigned int *eb = (int *)expand_bits_8;
+
+	for (l = 0; l < 16; ++l)
+	{
+		bits = *font++;
+		base[0] = (eb[bits >> 4] & fg) ^ bg;
+		base[1] = (eb[bits & 0xf] & fg) ^ bg;
+		base = (unsigned int *) ((char *)base + rb);
+	}
+}
+
+static noinline void draw_byte(unsigned char c, long locX, long locY)
+{
+	unsigned char *base	= calc_base(locX << 3, locY << 4);
+	unsigned char *font	= &vga_font[((unsigned int)c) * 16];
+	int rb			= dispDeviceRowBytes;
+
+	rmci_maybe_on();
+	switch(dispDeviceDepth) {
+	case 24:
+	case 32:
+		draw_byte_32(font, (unsigned int *)base, rb);
+		break;
+	case 15:
+	case 16:
+		draw_byte_16(font, (unsigned int *)base, rb);
+		break;
+	case 8:
+		draw_byte_8(font, (unsigned int *)base, rb);
+		break;
+	}
+	rmci_maybe_off();
+}
+
 void btext_drawchar(char c)
 {
 	int cline = 0;
@@ -465,107 +591,12 @@ void btext_drawhex(unsigned long v)
 	btext_drawchar(' ');
 }
 
-static void draw_byte(unsigned char c, long locX, long locY)
-{
-	unsigned char *base	= calc_base(locX << 3, locY << 4);
-	unsigned char *font	= &vga_font[((unsigned int)c) * 16];
-	int rb			= dispDeviceRowBytes;
-
-	switch(dispDeviceDepth) {
-	case 24:
-	case 32:
-		draw_byte_32(font, (unsigned int *)base, rb);
-		break;
-	case 15:
-	case 16:
-		draw_byte_16(font, (unsigned int *)base, rb);
-		break;
-	case 8:
-		draw_byte_8(font, (unsigned int *)base, rb);
-		break;
-	}
-}
-
-static unsigned int expand_bits_8[16] = {
-	0x00000000,
-	0x000000ff,
-	0x0000ff00,
-	0x0000ffff,
-	0x00ff0000,
-	0x00ff00ff,
-	0x00ffff00,
-	0x00ffffff,
-	0xff000000,
-	0xff0000ff,
-	0xff00ff00,
-	0xff00ffff,
-	0xffff0000,
-	0xffff00ff,
-	0xffffff00,
-	0xffffffff
-};
-
-static unsigned int expand_bits_16[4] = {
-	0x00000000,
-	0x0000ffff,
-	0xffff0000,
-	0xffffffff
-};
-
-
-static void draw_byte_32(unsigned char *font, unsigned int *base, int rb)
-{
-	int l, bits;
-	int fg = 0xFFFFFFFFUL;
-	int bg = 0x00000000UL;
-
-	for (l = 0; l < 16; ++l)
-	{
-		bits = *font++;
-		base[0] = (-(bits >> 7) & fg) ^ bg;
-		base[1] = (-((bits >> 6) & 1) & fg) ^ bg;
-		base[2] = (-((bits >> 5) & 1) & fg) ^ bg;
-		base[3] = (-((bits >> 4) & 1) & fg) ^ bg;
-		base[4] = (-((bits >> 3) & 1) & fg) ^ bg;
-		base[5] = (-((bits >> 2) & 1) & fg) ^ bg;
-		base[6] = (-((bits >> 1) & 1) & fg) ^ bg;
-		base[7] = (-(bits & 1) & fg) ^ bg;
-		base = (unsigned int *) ((char *)base + rb);
-	}
-}
-
-static void draw_byte_16(unsigned char *font, unsigned int *base, int rb)
-{
-	int l, bits;
-	int fg = 0xFFFFFFFFUL;
-	int bg = 0x00000000UL;
-	unsigned int *eb = (int *)expand_bits_16;
-
-	for (l = 0; l < 16; ++l)
-	{
-		bits = *font++;
-		base[0] = (eb[bits >> 6] & fg) ^ bg;
-		base[1] = (eb[(bits >> 4) & 3] & fg) ^ bg;
-		base[2] = (eb[(bits >> 2) & 3] & fg) ^ bg;
-		base[3] = (eb[bits & 3] & fg) ^ bg;
-		base = (unsigned int *) ((char *)base + rb);
-	}
-}
-
-static void draw_byte_8(unsigned char *font, unsigned int *base, int rb)
+void __init udbg_init_btext(void)
 {
-	int l, bits;
-	int fg = 0x0F0F0F0FUL;
-	int bg = 0x00000000UL;
-	unsigned int *eb = (int *)expand_bits_8;
-
-	for (l = 0; l < 16; ++l)
-	{
-		bits = *font++;
-		base[0] = (eb[bits >> 4] & fg) ^ bg;
-		base[1] = (eb[bits & 0xf] & fg) ^ bg;
-		base = (unsigned int *) ((char *)base + rb);
-	}
+	/* If btext is enabled, we might have a BAT setup for early display,
+	 * thus we do enable some very basic udbg output
+	 */
+	udbg_putc = btext_drawchar;
 }
 
 static unsigned char vga_font[cmapsz] = {
@@ -913,10 +944,3 @@ static unsigned char vga_font[cmapsz] = {
 0x00, 0x00, 0x00, 0x00,
 };
 
-void __init udbg_init_btext(void)
-{
-	/* If btext is enabled, we might have a BAT setup for early display,
-	 * thus we do enable some very basic udbg output
-	 */
-	udbg_putc = btext_drawchar;
-}
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index a781566d3993..0db7cb4060c1 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -249,6 +249,37 @@ _GLOBAL(__bswapdi2)
 	blr
 
 #if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE)
+
+_GLOBAL(rmci_on)
+	sync
+	isync
+	li	r3,0x100
+	rldicl	r3,r3,32,0
+	mfspr	r5,SPRN_HID4
+	or	r5,r5,r3
+	sync
+	mtspr	SPRN_HID4,r5
+	isync
+	slbia
+	isync
+	sync
+	blr
+
+_GLOBAL(rmci_off)
+	sync
+	isync
+	li	r3,0x100
+	rldicl	r3,r3,32,0
+	mfspr	r5,SPRN_HID4
+	andc	r5,r5,r3
+	sync
+	mtspr	SPRN_HID4,r5
+	isync
+	slbia
+	isync
+	sync
+	blr
+
 /*
  * Do an IO access in real mode
  */
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 607902424e73..57df5cb1dcc4 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2082,6 +2082,22 @@ static void __init prom_check_displays(void)
 					   clut[2]) != 0)
 				break;
 #endif /* CONFIG_LOGO_LINUX_CLUT224 */
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
+		if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
+		    PROM_ERROR) {
+			u32 width, height, pitch, addr;
+
+			prom_printf("Setting btext !\n");
+			prom_getprop(node, "width", &width, 4);
+			prom_getprop(node, "height", &height, 4);
+			prom_getprop(node, "linebytes", &pitch, 4);
+			prom_getprop(node, "address", &addr, 4);
+			prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
+				    width, height, pitch, addr);
+			btext_setup_display(width, height, 8, pitch, addr);
+		}
+#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
 	}
 }
 
diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
index 3765da6be4f2..b0c263da219a 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -22,7 +22,8 @@ __secondary_hold_acknowledge __secondary_hold_spinloop __start
 strcmp strcpy strlcpy strlen strncmp strstr logo_linux_clut224
 reloc_got2 kernstart_addr memstart_addr linux_banner _stext
 opal_query_takeover opal_do_takeover opal_enter_rtas opal_secondary_entry
-boot_command_line __prom_init_toc_start __prom_init_toc_end"
+boot_command_line __prom_init_toc_start __prom_init_toc_end
+btext_setup_display"
 
 NM="$1"
 OBJ="$2"
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 79ba9b77fe72..0c0450dd4d31 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -10,7 +10,7 @@
  *      2 of the License, or (at your option) any later version.
  */
 
-#undef DEBUG
+#define DEBUG
 
 #include <linux/export.h>
 #include <linux/string.h>
@@ -240,6 +240,18 @@ void __init early_setup(unsigned long dt_ptr)
 	reserve_hugetlb_gpages();
 
 	DBG(" <- early_setup()\n");
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
+	/*
+	 * This needs to be done *last* (after the above DBG() even)
+	 *
+	 * Right after we return from this function, we turn on the MMU
+	 * which means the real-mode access trick that btext does will
+	 * no longer work, it needs to switch to using a real MMU
+	 * mapping. This call will ensure that it does
+	 */
+	btext_map();
+#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
 }
 
 #ifdef CONFIG_SMP
-- 
cgit v1.2.3


From de021bb79c7636df24864fa2dbb958121303663b Mon Sep 17 00:00:00 2001
From: Tiejun Chen <tiejun.chen@windriver.com>
Date: Tue, 16 Jul 2013 11:09:30 +0800
Subject: powerpc/ppc64: Rename SOFT_DISABLE_INTS with RECONCILE_IRQ_STATE

The SOFT_DISABLE_INTS seems an odd name for something that updates the
software state to be consistent with interrupts being hard disabled, so
rename SOFT_DISABLE_INTS with RECONCILE_IRQ_STATE to avoid this confusion.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/exception-64s.h | 2 +-
 arch/powerpc/include/asm/irqflags.h      | 7 ++++---
 arch/powerpc/kernel/entry_64.S           | 4 ++--
 arch/powerpc/kernel/exceptions-64e.S     | 4 ++--
 4 files changed, 9 insertions(+), 8 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 07ca627e52c0..4834a6d5a75c 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -479,7 +479,7 @@ label##_relon_hv:							\
  */
 
 /* Exception addition: Hard disable interrupts */
-#define DISABLE_INTS	SOFT_DISABLE_INTS(r10,r11)
+#define DISABLE_INTS	RECONCILE_IRQ_STATE(r10,r11)
 
 #define ADD_NVGPRS				\
 	bl	.save_nvgprs
diff --git a/arch/powerpc/include/asm/irqflags.h b/arch/powerpc/include/asm/irqflags.h
index 6f9b6e23dc5a..f51a5580bfd0 100644
--- a/arch/powerpc/include/asm/irqflags.h
+++ b/arch/powerpc/include/asm/irqflags.h
@@ -40,9 +40,10 @@
 #define TRACE_DISABLE_INTS	TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off)
 
 /*
- * This is used by assembly code to soft-disable interrupts
+ * This is used by assembly code to soft-disable interrupts first and
+ * reconcile irq state.
  */
-#define SOFT_DISABLE_INTS(__rA, __rB)		\
+#define RECONCILE_IRQ_STATE(__rA, __rB)		\
 	lbz	__rA,PACASOFTIRQEN(r13);	\
 	lbz	__rB,PACAIRQHAPPENED(r13);	\
 	cmpwi	cr0,__rA,0;			\
@@ -58,7 +59,7 @@
 #define TRACE_ENABLE_INTS
 #define TRACE_DISABLE_INTS
 
-#define SOFT_DISABLE_INTS(__rA, __rB)		\
+#define RECONCILE_IRQ_STATE(__rA, __rB)		\
 	lbz	__rA,PACAIRQHAPPENED(r13);	\
 	li	__rB,0;				\
 	ori	__rA,__rA,PACA_IRQ_HARD_DIS;	\
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index ab15b8d057ad..c1055a150b88 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -721,9 +721,9 @@ resume_kernel:
 
 	/*
 	 * Here we are preempting the current task. We want to make
-	 * sure we are soft-disabled first
+	 * sure we are soft-disabled first and reconcile irq state.
 	 */
-	SOFT_DISABLE_INTS(r3,r4)
+	RECONCILE_IRQ_STATE(r3,r4)
 1:	bl	.preempt_schedule_irq
 
 	/* Re-test flags and eventually loop */
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 645170a07ada..2d067049db27 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -198,9 +198,9 @@ exc_##n##_common:							    \
 /* This second version is meant for exceptions that don't immediately
  * hard-enable. We set a bit in paca->irq_happened to ensure that
  * a subsequent call to arch_local_irq_restore() will properly
- * hard-enable and avoid the fast-path
+ * hard-enable and avoid the fast-path, and then reconcile irq state.
  */
-#define INTS_DISABLE	SOFT_DISABLE_INTS(r3,r4)
+#define INTS_DISABLE	RECONCILE_IRQ_STATE(r3,r4)
 
 /* This is called by exceptions that used INTS_KEEP (that did not touch
  * irq indicators in the PACA). This will restore MSR:EE to it's previous
-- 
cgit v1.2.3


From ecd73cc5c9e137559f4625b347f20cf9ed0de3d5 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 15 Jul 2013 13:03:08 +1000
Subject: powerpc: Better split CONFIG_PPC_INDIRECT_PIO and
 CONFIG_PPC_INDIRECT_MMIO

Remove the generic PPC_INDIRECT_IO and ensure we only add overhead
to the right accessors. IE. If only CONFIG_PPC_INDIRECT_PIO is set,
we don't add overhead to all MMIO accessors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/io.h        | 25 +++++++++++++++----------
 arch/powerpc/kernel/Makefile         |  2 +-
 arch/powerpc/kernel/io-workarounds.c | 19 ++++++++++++++++++-
 arch/powerpc/kernel/setup_64.c       |  5 ++---
 arch/powerpc/platforms/Kconfig       |  7 +------
 5 files changed, 37 insertions(+), 21 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index dd15e5e37d6d..6cc61a3c43ee 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -69,8 +69,10 @@ extern unsigned long pci_dram_offset;
 
 extern resource_size_t isa_mem_base;
 
-#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_INDIRECT_IO)
-#error CONFIG_PPC_INDIRECT_IO is not yet supported on 32 bits
+#ifdef CONFIG_PPC32
+#if defined(CONFIG_PPC_INDIRECT_PIO) || defined(CONFIG_PPC_INDIRECT_MMIO)
+#error CONFIG_PPC_INDIRECT_{PIO,MMIO} are not yet supported on 32 bits
+#endif
 #endif
 
 /*
@@ -222,9 +224,9 @@ extern void _memcpy_toio(volatile void __iomem *dest, const void *src,
  * for PowerPC is as close as possible to the x86 version of these, and thus
  * provides fairly heavy weight barriers for the non-raw versions
  *
- * In addition, they support a hook mechanism when CONFIG_PPC_INDIRECT_IO
- * allowing the platform to provide its own implementation of some or all
- * of the accessors.
+ * In addition, they support a hook mechanism when CONFIG_PPC_INDIRECT_MMIO
+ * or CONFIG_PPC_INDIRECT_PIO are set allowing the platform to provide its
+ * own implementation of some or all of the accessors.
  */
 
 /*
@@ -240,8 +242,8 @@ extern void _memcpy_toio(volatile void __iomem *dest, const void *src,
 
 /* Indirect IO address tokens:
  *
- * When CONFIG_PPC_INDIRECT_IO is set, the platform can provide hooks
- * on all IOs. (Note that this is all 64 bits only for now)
+ * When CONFIG_PPC_INDIRECT_MMIO is set, the platform can provide hooks
+ * on all MMIOs. (Note that this is all 64 bits only for now)
  *
  * To help platforms who may need to differenciate MMIO addresses in
  * their hooks, a bitfield is reserved for use by the platform near the
@@ -263,11 +265,14 @@ extern void _memcpy_toio(volatile void __iomem *dest, const void *src,
  *
  * The direct IO mapping operations will then mask off those bits
  * before doing the actual access, though that only happen when
- * CONFIG_PPC_INDIRECT_IO is set, thus be careful when you use that
+ * CONFIG_PPC_INDIRECT_MMIO is set, thus be careful when you use that
  * mechanism
+ *
+ * For PIO, there is a separate CONFIG_PPC_INDIRECT_PIO which makes
+ * all PIO functions call through a hook.
  */
 
-#ifdef CONFIG_PPC_INDIRECT_IO
+#ifdef CONFIG_PPC_INDIRECT_MMIO
 #define PCI_IO_IND_TOKEN_MASK	0x0fff000000000000ul
 #define PCI_IO_IND_TOKEN_SHIFT	48
 #define PCI_FIX_ADDR(addr)						\
@@ -672,7 +677,7 @@ extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea,
 extern void __iounmap_at(void *ea, unsigned long size);
 
 /*
- * When CONFIG_PPC_INDIRECT_IO is set, we use the generic iomap implementation
+ * When CONFIG_PPC_INDIRECT_PIO is set, we use the generic iomap implementation
  * which needs some additional definitions here. They basically allow PIO
  * space overall to be 1GB. This will work as long as we never try to use
  * iomap to map MMIO below 1GB which should be fine on ppc64
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index a8619bfe879e..725c2fb9f729 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -119,7 +119,7 @@ obj-$(CONFIG_FTRACE_SYSCALLS)	+= ftrace.o
 
 obj-$(CONFIG_8XX_MINIMAL_FPEMU) += softemu8xx.o
 
-ifneq ($(CONFIG_PPC_INDIRECT_IO),y)
+ifneq ($(CONFIG_PPC_INDIRECT_PIO),y)
 obj-y				+= iomap.o
 endif
 
diff --git a/arch/powerpc/kernel/io-workarounds.c b/arch/powerpc/kernel/io-workarounds.c
index fa0b54b2a362..24b968f8e4d8 100644
--- a/arch/powerpc/kernel/io-workarounds.c
+++ b/arch/powerpc/kernel/io-workarounds.c
@@ -53,6 +53,7 @@ static struct iowa_bus *iowa_pci_find(unsigned long vaddr, unsigned long paddr)
 	return NULL;
 }
 
+#ifdef CONFIG_PPC_INDIRECT_MMIO
 struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
 {
 	unsigned hugepage_shift;
@@ -90,13 +91,25 @@ struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
 
 	return bus;
 }
+#else /* CONFIG_PPC_INDIRECT_MMIO */
+struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
+{
+	return NULL;
+}
+#endif /* !CONFIG_PPC_INDIRECT_MMIO */
 
+#ifdef CONFIG_PPC_INDIRECT_PIO
 struct iowa_bus *iowa_pio_find_bus(unsigned long port)
 {
 	unsigned long vaddr = (unsigned long)pci_io_base + port;
 	return iowa_pci_find(vaddr, 0);
 }
-
+#else
+struct iowa_bus *iowa_pio_find_bus(unsigned long port)
+{
+	return NULL;
+}
+#endif
 
 #define DEF_PCI_AC_RET(name, ret, at, al, space, aa)		\
 static ret iowa_##name at					\
@@ -137,6 +150,7 @@ static const struct ppc_pci_io iowa_pci_io = {
 
 };
 
+#ifdef CONFIG_PPC_INDIRECT_MMIO
 static void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
 				  unsigned long flags, void *caller)
 {
@@ -151,6 +165,9 @@ static void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
 	}
 	return res;
 }
+#else /* CONFIG_PPC_INDIRECT_MMIO */
+#define iowa_ioremap NULL
+#endif /* !CONFIG_PPC_INDIRECT_MMIO */
 
 /* Enable IO workaround */
 static void io_workaround_init(void)
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 0c0450dd4d31..9d5bae118d7e 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -716,8 +716,7 @@ void __init setup_per_cpu_areas(void)
 #endif
 
 
-#ifdef CONFIG_PPC_INDIRECT_IO
+#if defined(CONFIG_PPC_INDIRECT_PIO) || defined(CONFIG_PPC_INDIRECT_MMIO)
 struct ppc_pci_io ppc_pci_io;
 EXPORT_SYMBOL(ppc_pci_io);
-#endif /* CONFIG_PPC_INDIRECT_IO */
-
+#endif
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index d703775bda30..bf9c6d4cd26c 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -202,17 +202,12 @@ config PPC_P7_NAP
 	bool
 	default n
 
-config PPC_INDIRECT_IO
-	bool
-	select GENERIC_IOMAP
-
 config PPC_INDIRECT_PIO
 	bool
-	select PPC_INDIRECT_IO
+	select GENERIC_IOMAP
 
 config PPC_INDIRECT_MMIO
 	bool
-	select PPC_INDIRECT_IO
 
 config PPC_IO_WORKAROUNDS
 	bool
-- 
cgit v1.2.3


From b37193b71846858d816e152d3a5db010d7b73f5e Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 15 Jul 2013 13:03:10 +1000
Subject: powerpc/powernv: Add helper to get ibm,chip-id of a node

This includes walking the parent nodes if necessary.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/prom.h |  2 ++
 arch/powerpc/kernel/prom.c      | 26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index bc2da154f68b..3bac73ecc349 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -58,6 +58,8 @@ static inline int of_node_to_nid(struct device_node *device) { return 0; }
 
 extern void of_instantiate_rtc(void);
 
+extern int of_get_ibm_chip_id(struct device_node *np);
+
 /* The of_drconf_cell struct defines the layout of the LMB array
  * specified in the device tree property
  * ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index eb23ac92abb9..2de07e52c356 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -795,6 +795,32 @@ struct device_node *of_find_next_cache_node(struct device_node *np)
 	return NULL;
 }
 
+/**
+ * of_get_ibm_chip_id - Returns the IBM "chip-id" of a device
+ * @np: device node of the device
+ *
+ * This looks for a property "ibm,chip-id" in the node or any
+ * of its parents and returns its content, or -1 if it cannot
+ * be found.
+ */
+int of_get_ibm_chip_id(struct device_node *np)
+{
+	of_node_get(np);
+	while(np) {
+		struct device_node *old = np;
+		const __be32 *prop;
+
+		prop = of_get_property(np, "ibm,chip-id", NULL);
+		if (prop) {
+			of_node_put(np);
+			return be32_to_cpup(prop);
+		}
+		np = of_get_parent(np);
+		of_node_put(old);
+	}
+	return -1;
+}
+
 #ifdef CONFIG_PPC_PSERIES
 /*
  * Fix up the uninitialized fields in a new device node:
-- 
cgit v1.2.3


From 3fafe9c202321a3edc47386d2071af89555c9f45 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 15 Jul 2013 13:03:11 +1000
Subject: powerpc/powernv: Add PIO accessors for Power8 LPC bus

This uses the hooks provided by CONFIG_PPC_INDIRECT_PIO to
implement a set of hooks for IO port access to use the LPC
bus via OPAL calls for the first 64K of IO space

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/io.h             |   8 ++
 arch/powerpc/include/asm/opal.h           |   2 +
 arch/powerpc/kernel/io.c                  |   3 +
 arch/powerpc/platforms/powernv/Kconfig    |   1 +
 arch/powerpc/platforms/powernv/Makefile   |   2 +-
 arch/powerpc/platforms/powernv/opal-lpc.c | 203 ++++++++++++++++++++++++++++++
 arch/powerpc/platforms/powernv/powernv.h  |   2 +
 arch/powerpc/platforms/powernv/setup.c    |   6 +
 8 files changed, 226 insertions(+), 1 deletion(-)
 create mode 100644 arch/powerpc/platforms/powernv/opal-lpc.c

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 6cc61a3c43ee..5a64757dc0d1 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -69,6 +69,14 @@ extern unsigned long pci_dram_offset;
 
 extern resource_size_t isa_mem_base;
 
+/* Boolean set by platform if PIO accesses are suppored while _IO_BASE
+ * is not set or addresses cannot be translated to MMIO. This is typically
+ * set when the platform supports "special" PIO accesses via a non memory
+ * mapped mechanism, and allows things like the early udbg UART code to
+ * function.
+ */
+extern bool isa_io_special;
+
 #ifdef CONFIG_PPC32
 #if defined(CONFIG_PPC_INDIRECT_PIO) || defined(CONFIG_PPC_INDIRECT_MMIO)
 #error CONFIG_PPC_INDIRECT_{PIO,MMIO} are not yet supported on 32 bits
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index c701e2be73b1..48ad6780c6d9 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -687,6 +687,8 @@ extern int opal_machine_check(struct pt_regs *regs);
 
 extern void opal_shutdown(void);
 
+extern void opal_lpc_init(void);
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __OPAL_H */
diff --git a/arch/powerpc/kernel/io.c b/arch/powerpc/kernel/io.c
index 886381f32c3d..2a2b4aeab80f 100644
--- a/arch/powerpc/kernel/io.c
+++ b/arch/powerpc/kernel/io.c
@@ -25,6 +25,9 @@
 #include <asm/firmware.h>
 #include <asm/bug.h>
 
+/* See definition in io.h */
+bool isa_io_special;
+
 void _insb(const volatile u8 __iomem *port, void *buf, long count)
 {
 	u8 *tbuf = buf;
diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig
index c24684c818ab..65295870766d 100644
--- a/arch/powerpc/platforms/powernv/Kconfig
+++ b/arch/powerpc/platforms/powernv/Kconfig
@@ -7,6 +7,7 @@ config PPC_POWERNV
 	select PPC_P7_NAP
 	select PPC_PCI_CHOICE if EMBEDDED
 	select EPAPR_BOOT
+	select PPC_INDIRECT_PIO
 	default y
 
 config POWERNV_MSI
diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile
index 7fe595152478..300c437d713c 100644
--- a/arch/powerpc/platforms/powernv/Makefile
+++ b/arch/powerpc/platforms/powernv/Makefile
@@ -1,5 +1,5 @@
 obj-y			+= setup.o opal-takeover.o opal-wrappers.o opal.o
-obj-y			+= opal-rtc.o opal-nvram.o
+obj-y			+= opal-rtc.o opal-nvram.o opal-lpc.o
 
 obj-$(CONFIG_SMP)	+= smp.o
 obj-$(CONFIG_PCI)	+= pci.o pci-p5ioc2.o pci-ioda.o
diff --git a/arch/powerpc/platforms/powernv/opal-lpc.c b/arch/powerpc/platforms/powernv/opal-lpc.c
new file mode 100644
index 000000000000..a7614bb14e17
--- /dev/null
+++ b/arch/powerpc/platforms/powernv/opal-lpc.c
@@ -0,0 +1,203 @@
+/*
+ * PowerNV LPC bus handling.
+ *
+ * Copyright 2013 IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/bug.h>
+
+#include <asm/machdep.h>
+#include <asm/firmware.h>
+#include <asm/xics.h>
+#include <asm/opal.h>
+
+static int opal_lpc_chip_id = -1;
+
+static u8 opal_lpc_inb(unsigned long port)
+{
+	int64_t rc;
+	uint32_t data;
+
+	if (opal_lpc_chip_id < 0 || port > 0xffff)
+		return 0xff;
+	rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port, &data, 1);
+	return rc ? 0xff : data;
+}
+
+static __le16 __opal_lpc_inw(unsigned long port)
+{
+	int64_t rc;
+	uint32_t data;
+
+	if (opal_lpc_chip_id < 0 || port > 0xfffe)
+		return 0xffff;
+	if (port & 1)
+		return (__le16)opal_lpc_inb(port) << 8 | opal_lpc_inb(port + 1);
+	rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port, &data, 2);
+	return rc ? 0xffff : data;
+}
+static u16 opal_lpc_inw(unsigned long port)
+{
+	return le16_to_cpu(__opal_lpc_inw(port));
+}
+
+static __le32 __opal_lpc_inl(unsigned long port)
+{
+	int64_t rc;
+	uint32_t data;
+
+	if (opal_lpc_chip_id < 0 || port > 0xfffc)
+		return 0xffffffff;
+	if (port & 3)
+		return (__le32)opal_lpc_inb(port    ) << 24 |
+		       (__le32)opal_lpc_inb(port + 1) << 16 |
+		       (__le32)opal_lpc_inb(port + 2) <<  8 |
+			       opal_lpc_inb(port + 3);
+	rc = opal_lpc_read(opal_lpc_chip_id, OPAL_LPC_IO, port, &data, 4);
+	return rc ? 0xffffffff : data;
+}
+
+static u32 opal_lpc_inl(unsigned long port)
+{
+	return le32_to_cpu(__opal_lpc_inl(port));
+}
+
+static void opal_lpc_outb(u8 val, unsigned long port)
+{
+	if (opal_lpc_chip_id < 0 || port > 0xffff)
+		return;
+	opal_lpc_write(opal_lpc_chip_id, OPAL_LPC_IO, port, val, 1);
+}
+
+static void __opal_lpc_outw(__le16 val, unsigned long port)
+{
+	if (opal_lpc_chip_id < 0 || port > 0xfffe)
+		return;
+	if (port & 1) {
+		opal_lpc_outb(val >> 8, port);
+		opal_lpc_outb(val     , port + 1);
+		return;
+	}
+	opal_lpc_write(opal_lpc_chip_id, OPAL_LPC_IO, port, val, 2);
+}
+
+static void opal_lpc_outw(u16 val, unsigned long port)
+{
+	__opal_lpc_outw(cpu_to_le16(val), port);
+}
+
+static void __opal_lpc_outl(__le32 val, unsigned long port)
+{
+	if (opal_lpc_chip_id < 0 || port > 0xfffc)
+		return;
+	if (port & 3) {
+		opal_lpc_outb(val >> 24, port);
+		opal_lpc_outb(val >> 16, port + 1);
+		opal_lpc_outb(val >>  8, port + 2);
+		opal_lpc_outb(val      , port + 3);
+		return;
+	}
+	opal_lpc_write(opal_lpc_chip_id, OPAL_LPC_IO, port, val, 4);
+}
+
+static void opal_lpc_outl(u32 val, unsigned long port)
+{
+	__opal_lpc_outl(cpu_to_le32(val), port);
+}
+
+static void opal_lpc_insb(unsigned long p, void *b, unsigned long c)
+{
+	u8 *ptr = b;
+
+	while(c--)
+		*(ptr++) = opal_lpc_inb(p);
+}
+
+static void opal_lpc_insw(unsigned long p, void *b, unsigned long c)
+{
+	__le16 *ptr = b;
+
+	while(c--)
+		*(ptr++) = __opal_lpc_inw(p);
+}
+
+static void opal_lpc_insl(unsigned long p, void *b, unsigned long c)
+{
+	__le32 *ptr = b;
+
+	while(c--)
+		*(ptr++) = __opal_lpc_inl(p);
+}
+
+static void opal_lpc_outsb(unsigned long p, const void *b, unsigned long c)
+{
+	const u8 *ptr = b;
+
+	while(c--)
+		opal_lpc_outb(*(ptr++), p);
+}
+
+static void opal_lpc_outsw(unsigned long p, const void *b, unsigned long c)
+{
+	const __le16 *ptr = b;
+
+	while(c--)
+		__opal_lpc_outw(*(ptr++), p);
+}
+
+static void opal_lpc_outsl(unsigned long p, const void *b, unsigned long c)
+{
+	const __le32 *ptr = b;
+
+	while(c--)
+		__opal_lpc_outl(*(ptr++), p);
+}
+
+static const struct ppc_pci_io opal_lpc_io = {
+	.inb	= opal_lpc_inb,
+	.inw	= opal_lpc_inw,
+	.inl	= opal_lpc_inl,
+	.outb	= opal_lpc_outb,
+	.outw	= opal_lpc_outw,
+	.outl	= opal_lpc_outl,
+	.insb	= opal_lpc_insb,
+	.insw	= opal_lpc_insw,
+	.insl	= opal_lpc_insl,
+	.outsb	= opal_lpc_outsb,
+	.outsw	= opal_lpc_outsw,
+	.outsl	= opal_lpc_outsl,
+};
+
+void opal_lpc_init(void)
+{
+	struct device_node *np;
+
+	/*
+	 * Look for a Power8 LPC bus tagged as "primary",
+	 * we currently support only one though the OPAL APIs
+	 * support any number.
+	 */
+	for_each_compatible_node(np, NULL, "ibm,power8-lpc") {
+		if (!of_device_is_available(np))
+			continue;
+		if (!of_get_property(np, "primary", NULL))
+			continue;
+		opal_lpc_chip_id = of_get_ibm_chip_id(np);
+		break;
+	}
+	if (opal_lpc_chip_id < 0)
+		return;
+
+	/* Setup special IO ops */
+	ppc_pci_io = opal_lpc_io;
+	isa_io_special = true;
+
+	pr_info("OPAL: Power8 LPC bus found, chip ID %d\n", opal_lpc_chip_id);
+}
diff --git a/arch/powerpc/platforms/powernv/powernv.h b/arch/powerpc/platforms/powernv/powernv.h
index a1c6f83fc391..de6819be1f95 100644
--- a/arch/powerpc/platforms/powernv/powernv.h
+++ b/arch/powerpc/platforms/powernv/powernv.h
@@ -15,4 +15,6 @@ static inline void pnv_pci_init(void) { }
 static inline void pnv_pci_shutdown(void) { }
 #endif
 
+extern void pnv_lpc_init(void);
+
 #endif /* _POWERNV_H */
diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index 84438af96c05..4ddb339700b9 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -54,6 +54,12 @@ static void __init pnv_setup_arch(void)
 
 static void __init pnv_init_early(void)
 {
+	/*
+	 * Initialize the LPC bus now so that legacy serial
+	 * ports can be found on it
+	 */
+	opal_lpc_init();
+
 #ifdef CONFIG_HVC_OPAL
 	if (firmware_has_feature(FW_FEATURE_OPAL))
 		hvc_opal_init_early();
-- 
cgit v1.2.3


From 309257484cc1a592e8ac5fbdd8cd661be2b80bf8 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 15 Jul 2013 13:03:12 +1000
Subject: powerpc: Cleanup udbg_16550 and add support for LPC PIO-only UARTs

The udbg_16550 code, which we use for our early consoles and debug
backends was fairly messy. Especially for the debug consoles, it
would re-implement the "high level" getc/putc/poll functions for
each access method. It also had code to configure the UART but only
for the straight MMIO method.

This changes it to instead abstract at the register accessor level,
and have the various functions and configuration routines use these.

The result is simpler and slightly smaller code, and free support
for non-MMIO mapped PIO UARTs, which such as the ones that can be
present on a POWER 8 LPC bus.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/udbg.h     |   9 +-
 arch/powerpc/kernel/legacy_serial.c |  46 +++--
 arch/powerpc/kernel/udbg_16550.c    | 344 ++++++++++++++++++------------------
 3 files changed, 206 insertions(+), 193 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/udbg.h b/arch/powerpc/include/asm/udbg.h
index dc590919f8eb..b51fba10e733 100644
--- a/arch/powerpc/include/asm/udbg.h
+++ b/arch/powerpc/include/asm/udbg.h
@@ -27,10 +27,11 @@ extern void udbg_printf(const char *fmt, ...)
 	__attribute__ ((format (printf, 1, 2)));
 extern void udbg_progress(char *s, unsigned short hex);
 
-extern void udbg_init_uart(void __iomem *comport, unsigned int speed,
-			   unsigned int clock);
-extern unsigned int udbg_probe_uart_speed(void __iomem *comport,
-					  unsigned int clock);
+extern void udbg_uart_init_mmio(void __iomem *addr, unsigned int stride);
+extern void udbg_uart_init_pio(unsigned long port, unsigned int stride);
+
+extern void udbg_uart_setup(unsigned int speed, unsigned int clock);
+extern unsigned int udbg_probe_uart_speed(unsigned int clock);
 
 struct device_node;
 extern void udbg_scc_init(int force_scc);
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index af1c63fc7dac..9a4d9fe9ff1c 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -221,14 +221,19 @@ static int __init add_legacy_isa_port(struct device_node *np,
 	/* Translate ISA address. If it fails, we still register the port
 	 * with no translated address so that it can be picked up as an IO
 	 * port later by the serial driver
+	 *
+	 * Note: Don't even try on P8 lpc, we know it's not directly mapped
 	 */
-	taddr = of_translate_address(np, reg);
-	if (taddr == OF_BAD_ADDR)
+	if (!of_device_is_compatible(isa_brg, "ibm,power8-lpc")) {
+		taddr = of_translate_address(np, reg);
+		if (taddr == OF_BAD_ADDR)
+			taddr = 0;
+	} else
 		taddr = 0;
 
 	/* Add port, irq will be dealt with later */
-	return add_legacy_port(np, index, UPIO_PORT, be32_to_cpu(reg[1]), taddr,
-			       NO_IRQ, UPF_BOOT_AUTOCONF, 0);
+	return add_legacy_port(np, index, UPIO_PORT, be32_to_cpu(reg[1]),
+			       taddr, NO_IRQ, UPF_BOOT_AUTOCONF, 0);
 
 }
 
@@ -307,19 +312,31 @@ static int __init add_legacy_pci_port(struct device_node *np,
 
 static void __init setup_legacy_serial_console(int console)
 {
-	struct legacy_serial_info *info =
-		&legacy_serial_infos[console];
+	struct legacy_serial_info *info = &legacy_serial_infos[console];
+	struct plat_serial8250_port *port = &legacy_serial_ports[console];
 	void __iomem *addr;
 
-	if (info->taddr == 0)
-		return;
-	addr = ioremap(info->taddr, 0x1000);
-	if (addr == NULL)
-		return;
+	/* Check if a translated MMIO address has been found */
+	if (info->taddr) {
+		addr = ioremap(info->taddr, 0x1000);
+		if (addr == NULL)
+			return;
+		udbg_uart_init_mmio(addr, 1);
+	} else {
+		/* Check if it's PIO and we support untranslated PIO */
+		if (port->iotype == UPIO_PORT && isa_io_special)
+			udbg_uart_init_pio(port->iobase, 1);
+		else
+			return;
+	}
+
+	/* Try to query the current speed */
 	if (info->speed == 0)
-		info->speed = udbg_probe_uart_speed(addr, info->clock);
+		info->speed = udbg_probe_uart_speed(info->clock);
+
+	/* Set it up */
 	DBG("default console speed = %d\n", info->speed);
-	udbg_init_uart(addr, info->speed, info->clock);
+	udbg_uart_setup(info->speed, info->clock);
 }
 
 /*
@@ -367,7 +384,8 @@ void __init find_legacy_serial_ports(void)
 	/* Next, fill our array with ISA ports */
 	for_each_node_by_type(np, "serial") {
 		struct device_node *isa = of_get_parent(np);
-		if (isa && !strcmp(isa->name, "isa")) {
+		if (isa && (!strcmp(isa->name, "isa") ||
+			    !strcmp(isa->name, "lpc"))) {
 			index = add_legacy_isa_port(np, isa);
 			if (index >= 0 && np == stdout)
 				legacy_serial_console = index;
diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c
index 6837f839ab78..25c58e81a009 100644
--- a/arch/powerpc/kernel/udbg_16550.c
+++ b/arch/powerpc/kernel/udbg_16550.c
@@ -18,23 +18,19 @@ extern void real_writeb(u8 data, volatile u8 __iomem *addr);
 extern u8 real_205_readb(volatile u8 __iomem  *addr);
 extern void real_205_writeb(u8 data, volatile u8 __iomem *addr);
 
-struct NS16550 {
-	/* this struct must be packed */
-	unsigned char rbr;  /* 0 */
-	unsigned char ier;  /* 1 */
-	unsigned char fcr;  /* 2 */
-	unsigned char lcr;  /* 3 */
-	unsigned char mcr;  /* 4 */
-	unsigned char lsr;  /* 5 */
-	unsigned char msr;  /* 6 */
-	unsigned char scr;  /* 7 */
-};
-
-#define thr rbr
-#define iir fcr
-#define dll rbr
-#define dlm ier
-#define dlab lcr
+#define UART_RBR	0
+#define UART_IER	1
+#define UART_FCR	2
+#define UART_LCR	3
+#define UART_MCR	4
+#define UART_LSR	5
+#define UART_MSR	6
+#define UART_SCR	7
+#define UART_THR	UART_RBR
+#define UART_IIR	UART_FCR
+#define UART_DLL	UART_RBR
+#define UART_DLM	UART_IER
+#define UART_DLAB	UART_LCR
 
 #define LSR_DR   0x01  /* Data ready */
 #define LSR_OE   0x02  /* Overrun */
@@ -47,52 +43,62 @@ struct NS16550 {
 
 #define LCR_DLAB 0x80
 
-static struct NS16550 __iomem *udbg_comport;
+static u8 (*udbg_uart_in)(unsigned int reg);
+static void (*udbg_uart_out)(unsigned int reg, u8 data);
 
-static void udbg_550_flush(void)
+static void udbg_uart_flush(void)
 {
-	if (udbg_comport) {
-		while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
-			/* wait for idle */;
-	}
+	if (!udbg_uart_in)
+		return;
+
+	/* wait for idle */
+	while ((udbg_uart_in(UART_LSR) & LSR_THRE) == 0)
+		cpu_relax();
 }
 
-static void udbg_550_putc(char c)
+static void udbg_uart_putc(char c)
 {
-	if (udbg_comport) {
-		if (c == '\n')
-			udbg_550_putc('\r');
-		udbg_550_flush();
-		out_8(&udbg_comport->thr, c);
-	}
+	if (!udbg_uart_out)
+		return;
+
+	if (c == '\n')
+		udbg_uart_putc('\r');
+	udbg_uart_flush();
+	udbg_uart_out(UART_THR, c);
 }
 
-static int udbg_550_getc_poll(void)
+static int udbg_uart_getc_poll(void)
 {
-	if (udbg_comport) {
-		if ((in_8(&udbg_comport->lsr) & LSR_DR) != 0)
-			return in_8(&udbg_comport->rbr);
-		else
-			return -1;
-	}
+	if (!udbg_uart_in || !(udbg_uart_in(UART_LSR) & LSR_DR))
+		return udbg_uart_in(UART_RBR);
 	return -1;
 }
 
-static int udbg_550_getc(void)
+static int udbg_uart_getc(void)
 {
-	if (udbg_comport) {
-		while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0)
-			/* wait for char */;
-		return in_8(&udbg_comport->rbr);
-	}
-	return -1;
+	if (!udbg_uart_in)
+		return -1;
+	/* wait for char */
+	while (!(udbg_uart_in(UART_LSR) & LSR_DR))
+		cpu_relax();
+	return udbg_uart_in(UART_RBR);
+}
+
+static void udbg_use_uart(void)
+{
+	udbg_putc = udbg_uart_putc;
+	udbg_flush = udbg_uart_flush;
+	udbg_getc = udbg_uart_getc;
+	udbg_getc_poll = udbg_uart_getc_poll;
 }
 
-void udbg_init_uart(void __iomem *comport, unsigned int speed,
-		    unsigned int clock)
+void udbg_uart_setup(unsigned int speed, unsigned int clock)
 {
 	unsigned int dll, base_bauds;
 
+	if (!udbg_uart_out)
+		return;
+
 	if (clock == 0)
 		clock = 1843200;
 	if (speed == 0)
@@ -101,51 +107,43 @@ void udbg_init_uart(void __iomem *comport, unsigned int speed,
 	base_bauds = clock / 16;
 	dll = base_bauds / speed;
 
-	if (comport) {
-		udbg_comport = (struct NS16550 __iomem *)comport;
-		out_8(&udbg_comport->lcr, 0x00);
-		out_8(&udbg_comport->ier, 0xff);
-		out_8(&udbg_comport->ier, 0x00);
-		out_8(&udbg_comport->lcr, LCR_DLAB);
-		out_8(&udbg_comport->dll, dll & 0xff);
-		out_8(&udbg_comport->dlm, dll >> 8);
-		/* 8 data, 1 stop, no parity */
-		out_8(&udbg_comport->lcr, 0x03);
-		/* RTS/DTR */
-		out_8(&udbg_comport->mcr, 0x03);
-		/* Clear & enable FIFOs */
-		out_8(&udbg_comport->fcr ,0x07);
-		udbg_putc = udbg_550_putc;
-		udbg_flush = udbg_550_flush;
-		udbg_getc = udbg_550_getc;
-		udbg_getc_poll = udbg_550_getc_poll;
-	}
+	udbg_uart_out(UART_LCR, 0x00);
+	udbg_uart_out(UART_IER, 0xff);
+	udbg_uart_out(UART_IER, 0x00);
+	udbg_uart_out(UART_LCR, LCR_DLAB);
+	udbg_uart_out(UART_DLL, dll & 0xff);
+	udbg_uart_out(UART_DLM, dll >> 8);
+	/* 8 data, 1 stop, no parity */
+	udbg_uart_out(UART_LCR, 0x3);
+	/* RTS/DTR */
+	udbg_uart_out(UART_MCR, 0x3);
+	/* Clear & enable FIFOs */
+	udbg_uart_out(UART_FCR, 0x7);
 }
 
-unsigned int udbg_probe_uart_speed(void __iomem *comport, unsigned int clock)
+unsigned int udbg_probe_uart_speed(unsigned int clock)
 {
 	unsigned int dll, dlm, divisor, prescaler, speed;
 	u8 old_lcr;
-	struct NS16550 __iomem *port = comport;
 
-	old_lcr = in_8(&port->lcr);
+	old_lcr = udbg_uart_in(UART_LCR);
 
 	/* select divisor latch registers.  */
-	out_8(&port->lcr, LCR_DLAB);
+	udbg_uart_out(UART_LCR, old_lcr | LCR_DLAB);
 
 	/* now, read the divisor */
-	dll = in_8(&port->dll);
-	dlm = in_8(&port->dlm);
+	dll = udbg_uart_in(UART_DLL);
+	dlm = udbg_uart_in(UART_DLM);
 	divisor = dlm << 8 | dll;
 
 	/* check prescaling */
-	if (in_8(&port->mcr) & 0x80)
+	if (udbg_uart_in(UART_MCR) & 0x80)
 		prescaler = 4;
 	else
 		prescaler = 1;
 
 	/* restore the LCR */
-	out_8(&port->lcr, old_lcr);
+	udbg_uart_out(UART_LCR, old_lcr);
 
 	/* calculate speed */
 	speed = (clock / prescaler) / (divisor * 16);
@@ -157,150 +155,151 @@ unsigned int udbg_probe_uart_speed(void __iomem *comport, unsigned int clock)
 	return speed;
 }
 
-#ifdef CONFIG_PPC_MAPLE
-void udbg_maple_real_flush(void)
+static union {
+	unsigned char __iomem *mmio_base;
+	unsigned long pio_base;
+} udbg_uart;
+
+static unsigned int udbg_uart_stride = 1;
+
+static u8 udbg_uart_in_pio(unsigned int reg)
 {
-	if (udbg_comport) {
-		while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
-			/* wait for idle */;
-	}
+	return inb(udbg_uart.pio_base + (reg * udbg_uart_stride));
 }
 
-void udbg_maple_real_putc(char c)
+static void udbg_uart_out_pio(unsigned int reg, u8 data)
 {
-	if (udbg_comport) {
-		if (c == '\n')
-			udbg_maple_real_putc('\r');
-		udbg_maple_real_flush();
-		real_writeb(c, &udbg_comport->thr); eieio();
-	}
+	outb(data, udbg_uart.pio_base + (reg * udbg_uart_stride));
 }
 
-void __init udbg_init_maple_realmode(void)
+void udbg_uart_init_pio(unsigned long port, unsigned int stride)
 {
-	udbg_comport = (struct NS16550 __iomem *)0xf40003f8;
+	if (!port)
+		return;
+	udbg_uart.pio_base = port;
+	udbg_uart_stride = stride;
+	udbg_uart_in = udbg_uart_in_pio;
+	udbg_uart_out = udbg_uart_out_pio;
+	udbg_use_uart();
+}
 
-	udbg_putc = udbg_maple_real_putc;
-	udbg_flush = udbg_maple_real_flush;
-	udbg_getc = NULL;
-	udbg_getc_poll = NULL;
+static u8 udbg_uart_in_mmio(unsigned int reg)
+{
+	return in_8(udbg_uart.mmio_base + (reg * udbg_uart_stride));
 }
-#endif /* CONFIG_PPC_MAPLE */
 
-#ifdef CONFIG_PPC_PASEMI
-void udbg_pas_real_flush(void)
+static void udbg_uart_out_mmio(unsigned int reg, u8 data)
 {
-	if (udbg_comport) {
-		while ((real_205_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
-			/* wait for idle */;
-	}
+	out_8(udbg_uart.mmio_base + (reg * udbg_uart_stride), data);
+}
+
+
+void udbg_uart_init_mmio(void __iomem *addr, unsigned int stride)
+{
+	if (!addr)
+		return;
+	udbg_uart.mmio_base = addr;
+	udbg_uart_stride = stride;
+	udbg_uart_in = udbg_uart_in_mmio;
+	udbg_uart_out = udbg_uart_out_mmio;
+	udbg_use_uart();
 }
 
-void udbg_pas_real_putc(char c)
+#ifdef CONFIG_PPC_MAPLE
+
+#define UDBG_UART_MAPLE_ADDR	((void __iomem *)0xf40003f8)
+
+static u8 udbg_uart_in_maple(unsigned int reg)
 {
-	if (udbg_comport) {
-		if (c == '\n')
-			udbg_pas_real_putc('\r');
-		udbg_pas_real_flush();
-		real_205_writeb(c, &udbg_comport->thr); eieio();
-	}
+	return real_readb(UDBG_UART_MAPLE_ADDR + reg);
 }
 
-void udbg_init_pas_realmode(void)
+static void udbg_uart_out_maple(unsigned int reg, u8 val)
 {
-	udbg_comport = (struct NS16550 __iomem *)0xfcff03f8UL;
+	real_writeb(val, UDBG_UART_MAPLE_ADDR + reg);
+}
 
-	udbg_putc = udbg_pas_real_putc;
-	udbg_flush = udbg_pas_real_flush;
-	udbg_getc = NULL;
-	udbg_getc_poll = NULL;
+void __init udbg_init_maple_realmode(void)
+{
+	udbg_uart_in = udbg_uart_in_maple;
+	udbg_uart_out = udbg_uart_out_maple;
+	udbg_use_uart();
 }
+
 #endif /* CONFIG_PPC_MAPLE */
 
-#ifdef CONFIG_PPC_EARLY_DEBUG_44x
-#include <platforms/44x/44x.h>
+#ifdef CONFIG_PPC_PASEMI
+
+#define UDBG_UART_PAS_ADDR	((void __iomem *)0xfcff03f8UL)
 
-static void udbg_44x_as1_flush(void)
+static u8 udbg_uart_in_pas(unsigned int reg)
 {
-	if (udbg_comport) {
-		while ((as1_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
-			/* wait for idle */;
-	}
+	return real_205_readb(UDBG_UART_PAS_ADDR + reg);
 }
 
-static void udbg_44x_as1_putc(char c)
+static void udbg_uart_out_pas(unsigned int reg, u8 val)
 {
-	if (udbg_comport) {
-		if (c == '\n')
-			udbg_44x_as1_putc('\r');
-		udbg_44x_as1_flush();
-		as1_writeb(c, &udbg_comport->thr); eieio();
-	}
+	real_205_writeb(val, UDBG_UART_PAS_ADDR + reg);
 }
 
-static int udbg_44x_as1_getc(void)
+void __init udbg_init_pas_realmode(void)
 {
-	if (udbg_comport) {
-		while ((as1_readb(&udbg_comport->lsr) & LSR_DR) == 0)
-			; /* wait for char */
-		return as1_readb(&udbg_comport->rbr);
-	}
-	return -1;
+	udbg_uart_in = udbg_uart_in_pas;
+	udbg_uart_out = udbg_uart_out_pas;
+	udbg_use_uart();
 }
 
-void __init udbg_init_44x_as1(void)
+#endif /* CONFIG_PPC_PASEMI */
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_44x
+
+#include <platforms/44x/44x.h>
+
+static u8 udbg_uart_in_44x_as1(unsigned int reg)
 {
-	udbg_comport =
-		(struct NS16550 __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR;
+	return as1_readb((void __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR + reg);
+}
 
-	udbg_putc = udbg_44x_as1_putc;
-	udbg_flush = udbg_44x_as1_flush;
-	udbg_getc = udbg_44x_as1_getc;
+static void udbg_uart_out_44x_as1(unsigned int reg, u8 val)
+{
+	as1_writeb(val, (void __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR + reg);
 }
-#endif /* CONFIG_PPC_EARLY_DEBUG_44x */
 
-#ifdef CONFIG_PPC_EARLY_DEBUG_40x
-static void udbg_40x_real_flush(void)
+void __init udbg_init_44x_as1(void)
 {
-	if (udbg_comport) {
-		while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
-			/* wait for idle */;
-	}
+	udbg_uart_in = udbg_uart_in_44x_as1;
+	udbg_uart_out = udbg_uart_out_44x_as1;
+	udbg_use_uart();
 }
 
-static void udbg_40x_real_putc(char c)
+#endif /* CONFIG_PPC_EARLY_DEBUG_44x */
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_40x
+
+static u8 udbg_uart_in_40x(unsigned int reg)
 {
-	if (udbg_comport) {
-		if (c == '\n')
-			udbg_40x_real_putc('\r');
-		udbg_40x_real_flush();
-		real_writeb(c, &udbg_comport->thr); eieio();
-	}
+	return real_readb((void __iomem *)CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR
+			  + reg);
 }
 
-static int udbg_40x_real_getc(void)
+static void udbg_uart_out_40x(unsigned int reg, u8 val)
 {
-	if (udbg_comport) {
-		while ((real_readb(&udbg_comport->lsr) & LSR_DR) == 0)
-			; /* wait for char */
-		return real_readb(&udbg_comport->rbr);
-	}
-	return -1;
+	real_writeb(val, (void __iomem *)CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR
+		    + reg);
 }
 
 void __init udbg_init_40x_realmode(void)
 {
-	udbg_comport = (struct NS16550 __iomem *)
-		CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR;
-
-	udbg_putc = udbg_40x_real_putc;
-	udbg_flush = udbg_40x_real_flush;
-	udbg_getc = udbg_40x_real_getc;
-	udbg_getc_poll = NULL;
+	udbg_uart_in = udbg_uart_in_40x;
+	udbg_uart_out = udbg_uart_out_40x;
+	udbg_use_uart();
 }
+
 #endif /* CONFIG_PPC_EARLY_DEBUG_40x */
 
+
 #ifdef CONFIG_PPC_EARLY_DEBUG_WSP
+
 static void udbg_wsp_flush(void)
 {
 	if (udbg_comport) {
@@ -339,13 +338,8 @@ static int udbg_wsp_getc_poll(void)
 
 void __init udbg_init_wsp(void)
 {
-	udbg_comport = (struct NS16550 __iomem *)WSP_UART_VIRT;
-
-	udbg_init_uart(udbg_comport, 57600, 50000000);
-
-	udbg_putc = udbg_wsp_putc;
-	udbg_flush = udbg_wsp_flush;
-	udbg_getc = udbg_wsp_getc;
-	udbg_getc_poll = udbg_wsp_getc_poll;
+	udbg_uart_init_mmio(WSP_UART_VIRT, 1);
+	udbg_uart_setup(57600, 50000000);
 }
+
 #endif /* CONFIG_PPC_EARLY_DEBUG_WSP */
-- 
cgit v1.2.3


From e0f5fa99a378d6910d234f3c8998aebfe2f54745 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 15 Jul 2013 13:03:13 +1000
Subject: powerpc: Check "status" property before adding legacy ISA serial
 ports

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/legacy_serial.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 9a4d9fe9ff1c..c9c469f3c5c3 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -386,9 +386,11 @@ void __init find_legacy_serial_ports(void)
 		struct device_node *isa = of_get_parent(np);
 		if (isa && (!strcmp(isa->name, "isa") ||
 			    !strcmp(isa->name, "lpc"))) {
-			index = add_legacy_isa_port(np, isa);
-			if (index >= 0 && np == stdout)
-				legacy_serial_console = index;
+			if (of_device_is_available(np)) {
+				index = add_legacy_isa_port(np, isa);
+				if (index >= 0 && np == stdout)
+					legacy_serial_console = index;
+			}
 		}
 		of_node_put(isa);
 	}
-- 
cgit v1.2.3


From 39cee08b28ea9541a6b6bd3317e13cbe71ab94ef Mon Sep 17 00:00:00 2001
From: Paul Bolle <pebolle@tiscali.nl>
Date: Tue, 16 Jul 2013 10:56:38 +0200
Subject: powerpc/8xx: Remove last traces of 8XX_MINIMAL_FPEMU

The Kconfig symbol 8XX_MINIMAL_FPEMU was removed in commit 968219fa33
("powerpc/8xx: Remove 8xx specific "minimal FPU emulation""). But that
commit didn't remove all code depending on that symbol. Do so now.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/emulated_ops.h |   2 -
 arch/powerpc/kernel/Makefile            |   2 -
 arch/powerpc/kernel/softemu8xx.c        | 199 --------------------------------
 3 files changed, 203 deletions(-)
 delete mode 100644 arch/powerpc/kernel/softemu8xx.c

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/emulated_ops.h b/arch/powerpc/include/asm/emulated_ops.h
index 63f2a22e9954..5a8b82aa7241 100644
--- a/arch/powerpc/include/asm/emulated_ops.h
+++ b/arch/powerpc/include/asm/emulated_ops.h
@@ -46,8 +46,6 @@ extern struct ppc_emulated {
 	struct ppc_emulated_entry unaligned;
 #ifdef CONFIG_MATH_EMULATION
 	struct ppc_emulated_entry math;
-#elif defined(CONFIG_8XX_MINIMAL_FPEMU)
-	struct ppc_emulated_entry 8xx;
 #endif
 #ifdef CONFIG_VSX
 	struct ppc_emulated_entry vsx;
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 725c2fb9f729..5b280f59b5ca 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -117,8 +117,6 @@ obj-$(CONFIG_DYNAMIC_FTRACE)	+= ftrace.o
 obj-$(CONFIG_FUNCTION_GRAPH_TRACER)	+= ftrace.o
 obj-$(CONFIG_FTRACE_SYSCALLS)	+= ftrace.o
 
-obj-$(CONFIG_8XX_MINIMAL_FPEMU) += softemu8xx.o
-
 ifneq ($(CONFIG_PPC_INDIRECT_PIO),y)
 obj-y				+= iomap.o
 endif
diff --git a/arch/powerpc/kernel/softemu8xx.c b/arch/powerpc/kernel/softemu8xx.c
deleted file mode 100644
index 29b2f81dd709..000000000000
--- a/arch/powerpc/kernel/softemu8xx.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/*
- * Software emulation of some PPC instructions for the 8xx core.
- *
- * Copyright (C) 1998 Dan Malek (dmalek@jlc.net)
- *
- * Software floating emuation for the MPC8xx processor.  I did this mostly
- * because it was easier than trying to get the libraries compiled for
- * software floating point.  The goal is still to get the libraries done,
- * but I lost patience and needed some hacks to at least get init and
- * shells running.  The first problem is the setjmp/longjmp that save
- * and restore the floating point registers.
- *
- * For this emulation, our working registers are found on the register
- * save area.
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/interrupt.h>
-
-#include <asm/pgtable.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-/* Eventually we may need a look-up table, but this works for now.
-*/
-#define LFS	48
-#define LFD	50
-#define LFDU	51
-#define STFD	54
-#define STFDU	55
-#define FMR	63
-
-void print_8xx_pte(struct mm_struct *mm, unsigned long addr)
-{
-	pgd_t *pgd;
-	pmd_t *pmd;
-	pte_t *pte;
-
-	printk(" pte @ 0x%8lx: ", addr);
-	pgd = pgd_offset(mm, addr & PAGE_MASK);
-	if (pgd) {
-		pmd = pmd_offset(pud_offset(pgd, addr & PAGE_MASK),
-		                 addr & PAGE_MASK);
-		if (pmd && pmd_present(*pmd)) {
-			pte = pte_offset_kernel(pmd, addr & PAGE_MASK);
-			if (pte) {
-				printk(" (0x%08lx)->(0x%08lx)->0x%08lx\n",
-				        (long)pgd, (long)pte, (long)pte_val(*pte));
-#define pp ((long)pte_val(*pte))
-				printk(" RPN: %05lx PP: %lx SPS: %lx SH: %lx "
-				       "CI: %lx v: %lx\n",
-				       pp>>12,    /* rpn */
-				       (pp>>10)&3, /* pp */
-				       (pp>>3)&1, /* small */
-				       (pp>>2)&1, /* shared */
-				       (pp>>1)&1, /* cache inhibit */
-				       pp&1       /* valid */
-				       );
-#undef pp
-			}
-			else {
-				printk("no pte\n");
-			}
-		}
-		else {
-			printk("no pmd\n");
-		}
-	}
-	else {
-		printk("no pgd\n");
-	}
-}
-
-int get_8xx_pte(struct mm_struct *mm, unsigned long addr)
-{
-	pgd_t *pgd;
-	pmd_t *pmd;
-	pte_t *pte;
-	int retval = 0;
-
-	pgd = pgd_offset(mm, addr & PAGE_MASK);
-	if (pgd) {
-		pmd = pmd_offset(pud_offset(pgd, addr & PAGE_MASK),
-		                 addr & PAGE_MASK);
-		if (pmd && pmd_present(*pmd)) {
-			pte = pte_offset_kernel(pmd, addr & PAGE_MASK);
-			if (pte) {
-				retval = (int)pte_val(*pte);
-			}
-		}
-	}
-	return retval;
-}
-
-/*
- * We return 0 on success, 1 on unimplemented instruction, and EFAULT
- * if a load/store faulted.
- */
-int Soft_emulate_8xx(struct pt_regs *regs)
-{
-	u32 inst, instword;
-	u32 flreg, idxreg, disp;
-	int retval;
-	s16 sdisp;
-	u32 *ea, *ip;
-
-	retval = 0;
-
-	instword = *((u32 *)regs->nip);
-	inst = instword >> 26;
-
-	flreg = (instword >> 21) & 0x1f;
-	idxreg = (instword >> 16) & 0x1f;
-	disp = instword & 0xffff;
-
-	ea = (u32 *)(regs->gpr[idxreg] + disp);
-	ip = (u32 *)&current->thread.TS_FPR(flreg);
-
-	switch ( inst )
-	{
-	case LFD:
-		/* this is a 16 bit quantity that is sign extended
-		 * so use a signed short here -- Cort
-		 */
-		sdisp = (instword & 0xffff);
-		ea = (u32 *)(regs->gpr[idxreg] + sdisp);
-		if (copy_from_user(ip, ea, sizeof(double)))
-			retval = -EFAULT;
-		break;
-
-	case LFDU:
-		if (copy_from_user(ip, ea, sizeof(double)))
-			retval = -EFAULT;
-		else
-			regs->gpr[idxreg] = (u32)ea;
-		break;
-	case LFS:
-		sdisp = (instword & 0xffff);
-		ea = (u32 *)(regs->gpr[idxreg] + sdisp);
-		if (copy_from_user(ip, ea, sizeof(float)))
-			retval = -EFAULT;
-		break;
-	case STFD:
-		/* this is a 16 bit quantity that is sign extended
-		 * so use a signed short here -- Cort
-		 */
-		sdisp = (instword & 0xffff);
-		ea = (u32 *)(regs->gpr[idxreg] + sdisp);
-		if (copy_to_user(ea, ip, sizeof(double)))
-			retval = -EFAULT;
-		break;
-
-	case STFDU:
-		if (copy_to_user(ea, ip, sizeof(double)))
-			retval = -EFAULT;
-		else
-			regs->gpr[idxreg] = (u32)ea;
-		break;
-	case FMR:
-		/* assume this is a fp move -- Cort */
-		memcpy(ip, &current->thread.TS_FPR((instword>>11)&0x1f),
-		       sizeof(double));
-		break;
-	default:
-		retval = 1;
-		printk("Bad emulation %s/%d\n"
-		       " NIP: %08lx instruction: %08x opcode: %x "
-		       "A: %x B: %x C: %x code: %x rc: %x\n",
-		       current->comm,current->pid,
-		       regs->nip,
-		       instword,inst,
-		       (instword>>16)&0x1f,
-		       (instword>>11)&0x1f,
-		       (instword>>6)&0x1f,
-		       (instword>>1)&0x3ff,
-		       instword&1);
-		{
-			int pa;
-			print_8xx_pte(current->mm,regs->nip);
-			pa = get_8xx_pte(current->mm,regs->nip) & PAGE_MASK;
-			pa |= (regs->nip & ~PAGE_MASK);
-			pa = (unsigned long)__va(pa);
-			printk("Kernel VA for NIP %x ", pa);
-			print_8xx_pte(current->mm,pa);
-		}
-	}
-
-	if (retval == 0)
-		regs->nip += 4;
-
-	return retval;
-}
-- 
cgit v1.2.3


From 6761ee3d7e139ec8728e1515bfc5fdcaf3be317e Mon Sep 17 00:00:00 2001
From: Kevin Hao <haokexin@gmail.com>
Date: Sun, 14 Jul 2013 16:40:06 +0800
Subject: powerpc/math-emu: Move the flush FPU state function into do_mathemu

By doing this we can make sure that the FPU state is only flushed to
the thread struct when it is really needed.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/traps.c  | 9 ---------
 arch/powerpc/math-emu/math.c | 9 +++++++++
 2 files changed, 9 insertions(+), 9 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index f58eaf23e8f1..82df498069bc 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1134,15 +1134,6 @@ void __kprobes program_check_exception(struct pt_regs *regs)
 	 * instruction or only on FP instructions, whether there is a
 	 * pattern to occurrences etc. -dgibson 31/Mar/2003
 	 */
-
-	/*
-	 * If we support a HW FPU, we need to ensure the FP state
-	 * if flushed into the thread_struct before attempting
-	 * emulation
-	 */
-#ifdef CONFIG_PPC_FPU
-	flush_fp_to_thread(current);
-#endif
 	switch (do_mathemu(regs)) {
 	case 0:
 		emulate_single_step(regs);
diff --git a/arch/powerpc/math-emu/math.c b/arch/powerpc/math-emu/math.c
index 3fe8e35287a1..f9ef34746f16 100644
--- a/arch/powerpc/math-emu/math.c
+++ b/arch/powerpc/math-emu/math.c
@@ -420,6 +420,15 @@ do_mathemu(struct pt_regs *regs)
 		goto illegal;
 	}
 
+	/*
+	 * If we support a HW FPU, we need to ensure the FP state
+	 * is flushed into the thread_struct before attempting
+	 * emulation
+	 */
+#ifdef CONFIG_PPC_FPU
+	flush_fp_to_thread(current);
+#endif
+
 	eflag = func(op0, op1, op2, op3);
 
 	if (insn & 1) {
-- 
cgit v1.2.3


From 3a3b5aa63fad4911e239055c2c0a89ce2dac62ce Mon Sep 17 00:00:00 2001
From: Kevin Hao <haokexin@gmail.com>
Date: Sun, 14 Jul 2013 16:40:07 +0800
Subject: powerpc: Introduce function emulate_math()

There are two invocations of do_mathemu() in traps.c. And the codes
in these two places are almost the same. Introduce a locale function
to eliminate the duplication. With this change we can also make sure
that in program_check_exception() the PPC_WARN_EMULATED is invoked for
the correctly emulated math instructions.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/traps.c | 79 +++++++++++++++++++--------------------------
 1 file changed, 34 insertions(+), 45 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 82df498069bc..e6fac2102b06 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1055,11 +1055,41 @@ int is_valid_bugaddr(unsigned long addr)
 	return is_kernel_addr(addr);
 }
 
+#ifdef CONFIG_MATH_EMULATION
+static int emulate_math(struct pt_regs *regs)
+{
+	int ret;
+	extern int do_mathemu(struct pt_regs *regs);
+
+	ret = do_mathemu(regs);
+	if (ret >= 0)
+		PPC_WARN_EMULATED(math, regs);
+
+	switch (ret) {
+	case 0:
+		emulate_single_step(regs);
+		return 0;
+	case 1: {
+			int code = 0;
+			code = __parse_fpscr(current->thread.fpscr.val);
+			_exception(SIGFPE, regs, code, regs->nip);
+			return 0;
+		}
+	case -EFAULT:
+		_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
+		return 0;
+	}
+
+	return -1;
+}
+#else
+static inline int emulate_math(struct pt_regs *regs) { return -1; }
+#endif
+
 void __kprobes program_check_exception(struct pt_regs *regs)
 {
 	enum ctx_state prev_state = exception_enter();
 	unsigned int reason = get_reason(regs);
-	extern int do_mathemu(struct pt_regs *regs);
 
 	/* We can now get here via a FP Unavailable exception if the core
 	 * has no FPU, in that case the reason flags will be 0 */
@@ -1125,7 +1155,6 @@ void __kprobes program_check_exception(struct pt_regs *regs)
 	if (!arch_irq_disabled_regs(regs))
 		local_irq_enable();
 
-#ifdef CONFIG_MATH_EMULATION
 	/* (reason & REASON_ILLEGAL) would be the obvious thing here,
 	 * but there seems to be a hardware bug on the 405GP (RevD)
 	 * that means ESR is sometimes set incorrectly - either to
@@ -1134,22 +1163,8 @@ void __kprobes program_check_exception(struct pt_regs *regs)
 	 * instruction or only on FP instructions, whether there is a
 	 * pattern to occurrences etc. -dgibson 31/Mar/2003
 	 */
-	switch (do_mathemu(regs)) {
-	case 0:
-		emulate_single_step(regs);
-		goto bail;
-	case 1: {
-			int code = 0;
-			code = __parse_fpscr(current->thread.fpscr.val);
-			_exception(SIGFPE, regs, code, regs->nip);
-			goto bail;
-		}
-	case -EFAULT:
-		_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
+	if (!emulate_math(regs))
 		goto bail;
-	}
-	/* fall through on any other errors */
-#endif /* CONFIG_MATH_EMULATION */
 
 	/* Try to emulate it if we should. */
 	if (reason & (REASON_ILLEGAL | REASON_PRIVILEGED)) {
@@ -1428,11 +1443,6 @@ void performance_monitor_exception(struct pt_regs *regs)
 #ifdef CONFIG_8xx
 void SoftwareEmulation(struct pt_regs *regs)
 {
-	extern int do_mathemu(struct pt_regs *);
-#if defined(CONFIG_MATH_EMULATION)
-	int errcode;
-#endif
-
 	CHECK_FULL_REGS(regs);
 
 	if (!user_mode(regs)) {
@@ -1440,31 +1450,10 @@ void SoftwareEmulation(struct pt_regs *regs)
 		die("Kernel Mode Software FPU Emulation", regs, SIGFPE);
 	}
 
-#ifdef CONFIG_MATH_EMULATION
-	errcode = do_mathemu(regs);
-	if (errcode >= 0)
-		PPC_WARN_EMULATED(math, regs);
-
-	switch (errcode) {
-	case 0:
-		emulate_single_step(regs);
-		return;
-	case 1: {
-			int code = 0;
-			code = __parse_fpscr(current->thread.fpscr.val);
-			_exception(SIGFPE, regs, code, regs->nip);
-			return;
-		}
-	case -EFAULT:
-		_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
+	if (!emulate_math(regs))
 		return;
-	default:
-		_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
-		return;
-	}
-#else
+
 	_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
-#endif
 }
 #endif /* CONFIG_8xx */
 
-- 
cgit v1.2.3


From 6ef94ff2e8e593de6de8d8d299a5fffaed35329c Mon Sep 17 00:00:00 2001
From: Kevin Hao <haokexin@gmail.com>
Date: Sun, 14 Jul 2013 17:02:03 +0800
Subject: powerpc: remove the unused function disable_kernel_fp()

The only using of function disable_kernel_fp() was already dropped
in the commit 5daf9071 (powerpc: merge align.c).

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/switch_to.h |  1 -
 arch/powerpc/kernel/misc_64.S        | 13 -------------
 2 files changed, 14 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h
index 49a13e0ef234..33e1cd823585 100644
--- a/arch/powerpc/include/asm/switch_to.h
+++ b/arch/powerpc/include/asm/switch_to.h
@@ -18,7 +18,6 @@ extern struct task_struct *_switch(struct thread_struct *prev,
 
 extern void giveup_fpu(struct task_struct *);
 extern void load_up_fpu(void);
-extern void disable_kernel_fp(void);
 extern void enable_kernel_fp(void);
 extern void flush_fp_to_thread(struct task_struct *);
 extern void enable_kernel_altivec(void);
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 0db7cb4060c1..971d7e78aff2 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -449,19 +449,6 @@ _GLOBAL(scom970_write)
 	blr
 #endif /* CONFIG_CPU_FREQ_PMAC64 || CONFIG_CPU_FREQ_MAPLE */
 
-
-/*
- * disable_kernel_fp()
- * Disable the FPU.
- */
-_GLOBAL(disable_kernel_fp)
-	mfmsr	r3
-	rldicl	r0,r3,(63-MSR_FP_LG),1
-	rldicl	r3,r0,(MSR_FP_LG+1),0
-	mtmsrd	r3			/* disable use of fpu now */
-	isync
-	blr
-
 /* kexec_wait(phys_cpu)
  *
  * wait for the flag to change, indicating this kernel is going away but
-- 
cgit v1.2.3


From 662499d04b6bc73d0ecab0ab876bacd5bbe7d6a7 Mon Sep 17 00:00:00 2001
From: Kevin Hao <haokexin@gmail.com>
Date: Sun, 14 Jul 2013 17:02:04 +0800
Subject: powerpc: Remove the redundant flush_fp_to_thread() in
 setup_sigcontext()

In commit c6e6771b(powerpc: Introduce VSX thread_struct and CONFIG_VSX)
we add a invocation of flush_fp_to_thread() before copying the FPR or
VSR to users. But we already invoke the flush_fp_to_thread() in this
function. So remove one of them.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/signal_64.c | 2 --
 1 file changed, 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index d0106b8a7484..f93ec2835a13 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -96,8 +96,6 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
 	unsigned long msr = regs->msr;
 	long err = 0;
 
-	flush_fp_to_thread(current);
-
 #ifdef CONFIG_ALTIVEC
 	err |= __put_user(v_regs, &sc->v_regs);
 
-- 
cgit v1.2.3


From 037f0eed57c3f35367ac32275e45f24e297549e9 Mon Sep 17 00:00:00 2001
From: Kevin Hao <haokexin@gmail.com>
Date: Sun, 14 Jul 2013 17:02:05 +0800
Subject: powerpc: Make flush_fp_to_thread() nop when CONFIG_PPC_FPU is
 disabled

In the current kernel, the function flush_fp_to_thread() is not
dependent on CONFIG_PPC_FPU. So most invocations of this function
is not wrapped by CONFIG_PPC_FPU. Even through we don't really
save the FPRs to the thread struct if CONFIG_PPC_FPU is not enabled,
but there does have some runtime overhead such as the check for
tsk->thread.regs and preempt disable and enable. It really make
no sense to do that. So make it a nop when CONFIG_PPC_FPU is
disabled. Also remove the wrapped #ifdef CONFIG_PPC_FPU
when invoking this function.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/switch_to.h | 7 ++++++-
 arch/powerpc/kernel/process.c        | 2 ++
 arch/powerpc/math-emu/math.c         | 3 +--
 3 files changed, 9 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h
index 33e1cd823585..39cf0f6cc373 100644
--- a/arch/powerpc/include/asm/switch_to.h
+++ b/arch/powerpc/include/asm/switch_to.h
@@ -19,7 +19,6 @@ extern struct task_struct *_switch(struct thread_struct *prev,
 extern void giveup_fpu(struct task_struct *);
 extern void load_up_fpu(void);
 extern void enable_kernel_fp(void);
-extern void flush_fp_to_thread(struct task_struct *);
 extern void enable_kernel_altivec(void);
 extern void load_up_altivec(struct task_struct *);
 extern int emulate_altivec(struct pt_regs *);
@@ -37,6 +36,12 @@ static inline void discard_lazy_cpu_state(void)
 }
 #endif
 
+#ifdef CONFIG_PPC_FPU
+extern void flush_fp_to_thread(struct task_struct *);
+#else
+static inline void flush_fp_to_thread(struct task_struct *t) { }
+#endif
+
 #ifdef CONFIG_ALTIVEC
 extern void flush_altivec_to_thread(struct task_struct *);
 extern void giveup_altivec(struct task_struct *);
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index c517dbe705fd..0ec255a81c66 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -74,6 +74,7 @@ struct task_struct *last_task_used_vsx = NULL;
 struct task_struct *last_task_used_spe = NULL;
 #endif
 
+#ifdef CONFIG_PPC_FPU
 /*
  * Make sure the floating-point register state in the
  * the thread_struct is up to date for task tsk.
@@ -107,6 +108,7 @@ void flush_fp_to_thread(struct task_struct *tsk)
 	}
 }
 EXPORT_SYMBOL_GPL(flush_fp_to_thread);
+#endif
 
 void enable_kernel_fp(void)
 {
diff --git a/arch/powerpc/math-emu/math.c b/arch/powerpc/math-emu/math.c
index 49eb2ac08fd3..bc901623d8df 100644
--- a/arch/powerpc/math-emu/math.c
+++ b/arch/powerpc/math-emu/math.c
@@ -7,6 +7,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/reg.h>
+#include <asm/switch_to.h>
 
 #include <asm/sfp-machine.h>
 #include <math-emu/double.h>
@@ -433,9 +434,7 @@ do_mathemu(struct pt_regs *regs)
 	 * is flushed into the thread_struct before attempting
 	 * emulation
 	 */
-#ifdef CONFIG_PPC_FPU
 	flush_fp_to_thread(current);
-#endif
 
 	eflag = func(op0, op1, op2, op3);
 
-- 
cgit v1.2.3


From 5f20be4478032eeba66abddc79eae3abea45c5c8 Mon Sep 17 00:00:00 2001
From: Kevin Hao <haokexin@gmail.com>
Date: Sun, 14 Jul 2013 17:02:06 +0800
Subject: powerpc: Remove the empty giveup_fpu() function on 32bit kernel

Instead of implementing an empty giveup_fpu() function for each
32bit processor type, replace them with an unique empty inline
function.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/switch_to.h |  3 ++-
 arch/powerpc/kernel/head_40x.S       |  8 --------
 arch/powerpc/kernel/head_44x.S       | 10 ----------
 arch/powerpc/kernel/head_8xx.S       |  4 ----
 arch/powerpc/kernel/head_fsl_booke.S | 10 ----------
 arch/powerpc/kernel/ppc_ksyms.c      |  2 ++
 6 files changed, 4 insertions(+), 33 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h
index 39cf0f6cc373..2c7edde8f1bb 100644
--- a/arch/powerpc/include/asm/switch_to.h
+++ b/arch/powerpc/include/asm/switch_to.h
@@ -16,7 +16,6 @@ struct thread_struct;
 extern struct task_struct *_switch(struct thread_struct *prev,
 				   struct thread_struct *next);
 
-extern void giveup_fpu(struct task_struct *);
 extern void load_up_fpu(void);
 extern void enable_kernel_fp(void);
 extern void enable_kernel_altivec(void);
@@ -38,8 +37,10 @@ static inline void discard_lazy_cpu_state(void)
 
 #ifdef CONFIG_PPC_FPU
 extern void flush_fp_to_thread(struct task_struct *);
+extern void giveup_fpu(struct task_struct *);
 #else
 static inline void flush_fp_to_thread(struct task_struct *t) { }
+static inline void giveup_fpu(struct task_struct *t) { }
 #endif
 
 #ifdef CONFIG_ALTIVEC
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 8a9b6f59822d..67ee0d6c1070 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -822,14 +822,6 @@ finish_tlb_load:
 	rfi			/* Should sync shadow TLBs */
 	b	.		/* prevent prefetch past rfi */
 
-/* extern void giveup_fpu(struct task_struct *prev)
- *
- * The PowerPC 4xx family of processors do not have an FPU, so this just
- * returns.
- */
-_ENTRY(giveup_fpu)
-	blr
-
 /* This is where the main kernel code starts.
  */
 start_here:
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 97e2671cde7f..c334f53453f7 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -784,16 +784,6 @@ _GLOBAL(__fixup_440A_mcheck)
 	sync
 	blr
 
-/*
- * extern void giveup_fpu(struct task_struct *prev)
- *
- * The 44x core does not have an FPU.
- */
-#ifndef CONFIG_PPC_FPU
-_GLOBAL(giveup_fpu)
-	blr
-#endif
-
 _GLOBAL(set_context)
 
 #ifdef CONFIG_BDI_SWITCH
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index b2a5860accfb..1b92a97b1b04 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -691,10 +691,6 @@ modified_instr:
 	b	151b
 #endif
 
-	.globl	giveup_fpu
-giveup_fpu:
-	blr
-
 /*
  * This is where the main kernel code starts.
  */
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index d10a7cacccd2..289afaffbbb5 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -947,16 +947,6 @@ _GLOBAL(giveup_spe)
 	blr
 #endif /* CONFIG_SPE */
 
-/*
- * extern void giveup_fpu(struct task_struct *prev)
- *
- * Not all FSL Book-E cores have an FPU
- */
-#ifndef CONFIG_PPC_FPU
-_GLOBAL(giveup_fpu)
-	blr
-#endif
-
 /*
  * extern void abort(void)
  *
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 380a6f9fa7f8..21646dbe1bb3 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -96,7 +96,9 @@ EXPORT_SYMBOL(pci_dram_offset);
 
 EXPORT_SYMBOL(start_thread);
 
+#ifdef CONFIG_PPC_FPU
 EXPORT_SYMBOL(giveup_fpu);
+#endif
 #ifdef CONFIG_ALTIVEC
 EXPORT_SYMBOL(giveup_altivec);
 #endif /* CONFIG_ALTIVEC */
-- 
cgit v1.2.3


From 630573c1da54925290cf7a4f45752f3e9876d7e0 Mon Sep 17 00:00:00 2001
From: Paul Mackerras <paulus@samba.org>
Date: Mon, 12 Aug 2013 16:12:06 +1000
Subject: powerpc: Fix denormalized exception handler

The denormalized exception handler (denorm_exception_hv) has a couple
of bugs.  If the CONFIG_PPC_DENORMALISATION option is not selected,
or the HSRR1_DENORM bit is not set in HSRR1, we don't test whether the
interrupt occurred within a KVM guest.  On the other hand, if the
HSRR1_DENORM bit is set and CONFIG_PPC_DENORMALISATION is enabled,
we corrupt the CFAR and PPR.

To correct these problems, this replaces the open-coded version of
EXCEPTION_PROLOG_1 that is there currently, and that is missing the
saving of PPR and CFAR values to the PACA, with an instance of
EXCEPTION_PROLOG_1.  This adds an explicit KVMTEST after testing
whether the exception is one we can handle, and adds code to restore
the CFAR on exit.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/exceptions-64s.S | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 4e00d223b2e3..2e00b268cfb7 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -367,11 +367,7 @@ denorm_exception_hv:
 	HMT_MEDIUM_PPR_DISCARD
 	mtspr	SPRN_SPRG_HSCRATCH0,r13
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
-	std	r11,PACA_EXGEN+EX_R11(r13)
-	std	r12,PACA_EXGEN+EX_R12(r13)
-	mfspr	r9,SPRN_SPRG_HSCRATCH0
-	std	r9,PACA_EXGEN+EX_R13(r13)
-	mfcr	r9
+	EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0x1500)
 
 #ifdef CONFIG_PPC_DENORMALISATION
 	mfspr	r10,SPRN_HSRR1
@@ -381,6 +377,7 @@ denorm_exception_hv:
 	bne+	denorm_assist
 #endif
 
+	KVMTEST(0x1500)
 	EXCEPTION_PROLOG_PSERIES_1(denorm_common, EXC_HV)
 	KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1500)
 
@@ -501,6 +498,10 @@ denorm_done:
 	mtcrf	0x80,r9
 	ld	r9,PACA_EXGEN+EX_R9(r13)
 	RESTORE_PPR_PACA(PACA_EXGEN, r10)
+BEGIN_FTR_SECTION
+	ld	r10,PACA_EXGEN+EX_CFAR(r13)
+	mtspr	SPRN_CFAR,r10
+END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
 	ld	r10,PACA_EXGEN+EX_R10(r13)
 	ld	r11,PACA_EXGEN+EX_R11(r13)
 	ld	r12,PACA_EXGEN+EX_R12(r13)
-- 
cgit v1.2.3


From a8a5356cd511db229aeaad636dc0f83d8c4d0a15 Mon Sep 17 00:00:00 2001
From: Paul Mackerras <paulus@samba.org>
Date: Mon, 12 Aug 2013 16:28:47 +1000
Subject: powerpc: Pull out cpu_core_mask updates into a separate function

This factors out the details of updating cpu_core_mask into a separate
function, to make it easier to change how the mask is calculated later.
This makes no functional change.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/smp.c | 56 +++++++++++++++++++++++------------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index e69211293789..0cc69d5deac9 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -631,11 +631,36 @@ static struct device_node *cpu_to_l2cache(int cpu)
 	return cache;
 }
 
+static void traverse_core_siblings(int cpu, bool add)
+{
+	struct device_node *l2_cache;
+	const struct cpumask *mask;
+	int i;
+
+	l2_cache = cpu_to_l2cache(cpu);
+	mask = add ? cpu_online_mask : cpu_present_mask;
+	for_each_cpu(i, mask) {
+		struct device_node *np = cpu_to_l2cache(i);
+		if (!np)
+			continue;
+		if (np == l2_cache) {
+			if (add) {
+				cpumask_set_cpu(cpu, cpu_core_mask(i));
+				cpumask_set_cpu(i, cpu_core_mask(cpu));
+			} else {
+				cpumask_clear_cpu(cpu, cpu_core_mask(i));
+				cpumask_clear_cpu(i, cpu_core_mask(cpu));
+			}
+		}
+		of_node_put(np);
+	}
+	of_node_put(l2_cache);
+}
+
 /* Activate a secondary processor. */
 void start_secondary(void *unused)
 {
 	unsigned int cpu = smp_processor_id();
-	struct device_node *l2_cache;
 	int i, base;
 
 	atomic_inc(&init_mm.mm_count);
@@ -674,18 +699,7 @@ void start_secondary(void *unused)
 		cpumask_set_cpu(cpu, cpu_core_mask(base + i));
 		cpumask_set_cpu(base + i, cpu_core_mask(cpu));
 	}
-	l2_cache = cpu_to_l2cache(cpu);
-	for_each_online_cpu(i) {
-		struct device_node *np = cpu_to_l2cache(i);
-		if (!np)
-			continue;
-		if (np == l2_cache) {
-			cpumask_set_cpu(cpu, cpu_core_mask(i));
-			cpumask_set_cpu(i, cpu_core_mask(cpu));
-		}
-		of_node_put(np);
-	}
-	of_node_put(l2_cache);
+	traverse_core_siblings(cpu, true);
 
 	smp_wmb();
 	notify_cpu_starting(cpu);
@@ -741,7 +755,6 @@ int arch_sd_sibling_asym_packing(void)
 #ifdef CONFIG_HOTPLUG_CPU
 int __cpu_disable(void)
 {
-	struct device_node *l2_cache;
 	int cpu = smp_processor_id();
 	int base, i;
 	int err;
@@ -761,20 +774,7 @@ int __cpu_disable(void)
 		cpumask_clear_cpu(cpu, cpu_core_mask(base + i));
 		cpumask_clear_cpu(base + i, cpu_core_mask(cpu));
 	}
-
-	l2_cache = cpu_to_l2cache(cpu);
-	for_each_present_cpu(i) {
-		struct device_node *np = cpu_to_l2cache(i);
-		if (!np)
-			continue;
-		if (np == l2_cache) {
-			cpumask_clear_cpu(cpu, cpu_core_mask(i));
-			cpumask_clear_cpu(i, cpu_core_mask(cpu));
-		}
-		of_node_put(np);
-	}
-	of_node_put(l2_cache);
-
+	traverse_core_siblings(cpu, false);
 
 	return 0;
 }
-- 
cgit v1.2.3


From 256f2d4b463d3030ebc8d2b54f427543814a2bdc Mon Sep 17 00:00:00 2001
From: Paul Mackerras <paulus@samba.org>
Date: Mon, 12 Aug 2013 16:29:33 +1000
Subject: powerpc: Use ibm, chip-id property to compute cpu_core_mask if
 available

Some systems have an ibm,chip-id property in the cpu nodes in the
device tree.  On these systems, we now use that to compute the
cpu_core_mask (i.e. the set of core siblings) rather than looking
at cache properties.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Tested-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/smp.c | 48 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 45 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 0cc69d5deac9..009900dd8f25 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -609,6 +609,33 @@ int cpu_first_thread_of_core(int core)
 }
 EXPORT_SYMBOL_GPL(cpu_first_thread_of_core);
 
+static void traverse_siblings_chip_id(int cpu, bool add, int chipid)
+{
+	const struct cpumask *mask;
+	struct device_node *np;
+	int i, plen;
+	const __be32 *prop;
+
+	mask = add ? cpu_online_mask : cpu_present_mask;
+	for_each_cpu(i, mask) {
+		np = of_get_cpu_node(i, NULL);
+		if (!np)
+			continue;
+		prop = of_get_property(np, "ibm,chip-id", &plen);
+		if (prop && plen == sizeof(int) &&
+		    of_read_number(prop, 1) == chipid) {
+			if (add) {
+				cpumask_set_cpu(cpu, cpu_core_mask(i));
+				cpumask_set_cpu(i, cpu_core_mask(cpu));
+			} else {
+				cpumask_clear_cpu(cpu, cpu_core_mask(i));
+				cpumask_clear_cpu(i, cpu_core_mask(cpu));
+			}
+		}
+		of_node_put(np);
+	}
+}
+
 /* Must be called when no change can occur to cpu_present_mask,
  * i.e. during cpu online or offline.
  */
@@ -633,14 +660,29 @@ static struct device_node *cpu_to_l2cache(int cpu)
 
 static void traverse_core_siblings(int cpu, bool add)
 {
-	struct device_node *l2_cache;
+	struct device_node *l2_cache, *np;
 	const struct cpumask *mask;
-	int i;
+	int i, chip, plen;
+	const __be32 *prop;
+
+	/* First see if we have ibm,chip-id properties in cpu nodes */
+	np = of_get_cpu_node(cpu, NULL);
+	if (np) {
+		chip = -1;
+		prop = of_get_property(np, "ibm,chip-id", &plen);
+		if (prop && plen == sizeof(int))
+			chip = of_read_number(prop, 1);
+		of_node_put(np);
+		if (chip >= 0) {
+			traverse_siblings_chip_id(cpu, add, chip);
+			return;
+		}
+	}
 
 	l2_cache = cpu_to_l2cache(cpu);
 	mask = add ? cpu_online_mask : cpu_present_mask;
 	for_each_cpu(i, mask) {
-		struct device_node *np = cpu_to_l2cache(i);
+		np = cpu_to_l2cache(i);
 		if (!np)
 			continue;
 		if (np == l2_cache) {
-- 
cgit v1.2.3


From 15863ff3b8dae4cacd831ce10aa34992e9ababb0 Mon Sep 17 00:00:00 2001
From: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Date: Mon, 12 Aug 2013 17:35:57 +0530
Subject: powerpc: Make chip-id information available to userspace

So far "/sys/devices/system/cpu/cpuX/topology/physical_package_id"
was always default (-1) on ppc64 architecture.

Now, some systems have an ibm,chip-id property in the cpu nodes in
the device tree. On these systems, we now use this information to
display physical_package_id.

Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/smp.h      |  1 +
 arch/powerpc/include/asm/topology.h |  1 +
 arch/powerpc/kernel/smp.c           | 15 +++++++++++++++
 3 files changed, 17 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h
index 9a5e71b0aea4..98da78e0c2c0 100644
--- a/arch/powerpc/include/asm/smp.h
+++ b/arch/powerpc/include/asm/smp.h
@@ -112,6 +112,7 @@ static inline struct cpumask *cpu_core_mask(int cpu)
 }
 
 extern int cpu_to_core_id(int cpu);
+extern int cpu_to_chip_id(int cpu);
 
 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
  *
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
index 161ab662843b..89e3ef2496ac 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -96,6 +96,7 @@ static inline int prrn_is_enabled(void)
 #ifdef CONFIG_PPC64
 #include <asm/smp.h>
 
+#define topology_physical_package_id(cpu)	(cpu_to_chip_id(cpu))
 #define topology_thread_cpumask(cpu)	(per_cpu(cpu_sibling_map, cpu))
 #define topology_core_cpumask(cpu)	(per_cpu(cpu_core_map, cpu))
 #define topology_core_id(cpu)		(cpu_to_core_id(cpu))
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 009900dd8f25..d9d8bb0f4454 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -596,6 +596,21 @@ out:
 	return id;
 }
 
+/* Return the value of the chip-id property corresponding
+ * to the given logical cpu.
+ */
+int cpu_to_chip_id(int cpu)
+{
+	struct device_node *np;
+
+	np = of_get_cpu_node(cpu, NULL);
+	if (!np)
+		return -1;
+
+	of_node_put(np);
+	return of_get_ibm_chip_id(np);
+}
+
 /* Helper routines for cpu to core mapping */
 int cpu_core_index_of_thread(int cpu)
 {
-- 
cgit v1.2.3


From dc0e643afc505e7feeac5f86e8fe82183847ebe7 Mon Sep 17 00:00:00 2001
From: Ian Munsie <imunsie@au1.ibm.com>
Date: Wed, 7 Aug 2013 02:01:27 +1000
Subject: powerpc: Make prom.c device tree accesses endian safe

On PowerPC the device tree is always big endian, but the CPU could be
either, so add be32_to_cpu where appropriate and change the types of
device tree data to __be32 etc to allow sparse to locate endian issues.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/prom.c | 60 ++++++++++++++++++++++++----------------------
 1 file changed, 31 insertions(+), 29 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 2de07e52c356..d8a687c5e3ee 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -215,16 +215,16 @@ static void __init check_cpu_pa_features(unsigned long node)
 #ifdef CONFIG_PPC_STD_MMU_64
 static void __init check_cpu_slb_size(unsigned long node)
 {
-	u32 *slb_size_ptr;
+	__be32 *slb_size_ptr;
 
 	slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL);
 	if (slb_size_ptr != NULL) {
-		mmu_slb_size = *slb_size_ptr;
+		mmu_slb_size = be32_to_cpup(slb_size_ptr);
 		return;
 	}
 	slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL);
 	if (slb_size_ptr != NULL) {
-		mmu_slb_size = *slb_size_ptr;
+		mmu_slb_size = be32_to_cpup(slb_size_ptr);
 	}
 }
 #else
@@ -279,11 +279,11 @@ static void __init check_cpu_feature_properties(unsigned long node)
 {
 	unsigned long i;
 	struct feature_property *fp = feature_properties;
-	const u32 *prop;
+	const __be32 *prop;
 
 	for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) {
 		prop = of_get_flat_dt_prop(node, fp->name, NULL);
-		if (prop && *prop >= fp->min_value) {
+		if (prop && be32_to_cpup(prop) >= fp->min_value) {
 			cur_cpu_spec->cpu_features |= fp->cpu_feature;
 			cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr;
 		}
@@ -295,8 +295,8 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 					  void *data)
 {
 	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
-	const u32 *prop;
-	const u32 *intserv;
+	const __be32 *prop;
+	const __be32 *intserv;
 	int i, nthreads;
 	unsigned long len;
 	int found = -1;
@@ -324,8 +324,9 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 		 * version 2 of the kexec param format adds the phys cpuid of
 		 * booted proc.
 		 */
-		if (initial_boot_params->version >= 2) {
-			if (intserv[i] == initial_boot_params->boot_cpuid_phys) {
+		if (be32_to_cpu(initial_boot_params->version) >= 2) {
+			if (be32_to_cpu(intserv[i]) ==
+			    be32_to_cpu(initial_boot_params->boot_cpuid_phys)) {
 				found = boot_cpu_count;
 				found_thread = i;
 			}
@@ -347,9 +348,10 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 
 	if (found >= 0) {
 		DBG("boot cpu: logical %d physical %d\n", found,
-			intserv[found_thread]);
+			be32_to_cpu(intserv[found_thread]));
 		boot_cpuid = found;
-		set_hard_smp_processor_id(found, intserv[found_thread]);
+		set_hard_smp_processor_id(found,
+			be32_to_cpu(intserv[found_thread]));
 
 		/*
 		 * PAPR defines "logical" PVR values for cpus that
@@ -366,8 +368,8 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 		 * it uses 0x0f000001.
 		 */
 		prop = of_get_flat_dt_prop(node, "cpu-version", NULL);
-		if (prop && (*prop & 0xff000000) == 0x0f000000)
-			identify_cpu(0, *prop);
+		if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000)
+			identify_cpu(0, be32_to_cpup(prop));
 
 		identical_pvr_fixup(node);
 	}
@@ -389,7 +391,7 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 int __init early_init_dt_scan_chosen_ppc(unsigned long node, const char *uname,
 					 int depth, void *data)
 {
-	unsigned long *lprop;
+	unsigned long *lprop; /* All these set by kernel, so no need to convert endian */
 
 	/* Use common scan routine to determine if this is the chosen node */
 	if (early_init_dt_scan_chosen(node, uname, depth, data) == 0)
@@ -591,16 +593,16 @@ static void __init early_reserve_mem_dt(void)
 static void __init early_reserve_mem(void)
 {
 	u64 base, size;
-	u64 *reserve_map;
+	__be64 *reserve_map;
 	unsigned long self_base;
 	unsigned long self_size;
 
-	reserve_map = (u64 *)(((unsigned long)initial_boot_params) +
-					initial_boot_params->off_mem_rsvmap);
+	reserve_map = (__be64 *)(((unsigned long)initial_boot_params) +
+			be32_to_cpu(initial_boot_params->off_mem_rsvmap));
 
 	/* before we do anything, lets reserve the dt blob */
 	self_base = __pa((unsigned long)initial_boot_params);
-	self_size = initial_boot_params->totalsize;
+	self_size = be32_to_cpu(initial_boot_params->totalsize);
 	memblock_reserve(self_base, self_size);
 
 	/* Look for the new "reserved-regions" property in the DT */
@@ -620,15 +622,15 @@ static void __init early_reserve_mem(void)
 	 * Handle the case where we might be booting from an old kexec
 	 * image that setup the mem_rsvmap as pairs of 32-bit values
 	 */
-	if (*reserve_map > 0xffffffffull) {
+	if (be64_to_cpup(reserve_map) > 0xffffffffull) {
 		u32 base_32, size_32;
-		u32 *reserve_map_32 = (u32 *)reserve_map;
+		__be32 *reserve_map_32 = (__be32 *)reserve_map;
 
 		DBG("Found old 32-bit reserve map\n");
 
 		while (1) {
-			base_32 = *(reserve_map_32++);
-			size_32 = *(reserve_map_32++);
+			base_32 = be32_to_cpup(reserve_map_32++);
+			size_32 = be32_to_cpup(reserve_map_32++);
 			if (size_32 == 0)
 				break;
 			/* skip if the reservation is for the blob */
@@ -644,8 +646,8 @@ static void __init early_reserve_mem(void)
 
 	/* Handle the reserve map in the fdt blob if it exists */
 	while (1) {
-		base = *(reserve_map++);
-		size = *(reserve_map++);
+		base = be64_to_cpup(reserve_map++);
+		size = be64_to_cpup(reserve_map++);
 		if (size == 0)
 			break;
 		DBG("reserving: %llx -> %llx\n", base, size);
@@ -903,7 +905,7 @@ struct device_node *of_get_cpu_node(int cpu, unsigned int *thread)
 	hardid = get_hard_smp_processor_id(cpu);
 
 	for_each_node_by_type(np, "cpu") {
-		const u32 *intserv;
+		const __be32 *intserv;
 		unsigned int plen, t;
 
 		/* Check for ibm,ppc-interrupt-server#s. If it doesn't exist
@@ -912,10 +914,10 @@ struct device_node *of_get_cpu_node(int cpu, unsigned int *thread)
 		intserv = of_get_property(np, "ibm,ppc-interrupt-server#s",
 				&plen);
 		if (intserv == NULL) {
-			const u32 *reg = of_get_property(np, "reg", NULL);
+			const __be32 *reg = of_get_property(np, "reg", NULL);
 			if (reg == NULL)
 				continue;
-			if (*reg == hardid) {
+			if (be32_to_cpup(reg) == hardid) {
 				if (thread)
 					*thread = 0;
 				return np;
@@ -923,7 +925,7 @@ struct device_node *of_get_cpu_node(int cpu, unsigned int *thread)
 		} else {
 			plen /= sizeof(u32);
 			for (t = 0; t < plen; t++) {
-				if (hardid == intserv[t]) {
+				if (hardid == be32_to_cpu(intserv[t])) {
 					if (thread)
 						*thread = t;
 					return np;
@@ -943,7 +945,7 @@ static int __init export_flat_device_tree(void)
 	struct dentry *d;
 
 	flat_dt_blob.data = initial_boot_params;
-	flat_dt_blob.size = initial_boot_params->totalsize;
+	flat_dt_blob.size = be32_to_cpu(initial_boot_params->totalsize);
 
 	d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR,
 				powerpc_debugfs_root, &flat_dt_blob);
-- 
cgit v1.2.3


From e91ae5bdc5f4cb77c3505f6e5b464385132ced4f Mon Sep 17 00:00:00 2001
From: Alistair Popple <alistair@popple.id.au>
Date: Wed, 7 Aug 2013 02:01:28 +1000
Subject: powerpc: More little endian fixes for prom.c

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/prom.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index d8a687c5e3ee..d87e03fc8cfd 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -456,7 +456,7 @@ static int __init early_init_dt_scan_drconf_memory(unsigned long node)
 	if (dm == NULL || l < sizeof(__be32))
 		return 0;
 
-	n = *dm++;	/* number of entries */
+	n = of_read_number(dm++, 1);	/* number of entries */
 	if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(__be32))
 		return 0;
 
@@ -468,7 +468,7 @@ static int __init early_init_dt_scan_drconf_memory(unsigned long node)
 
 	for (; n != 0; --n) {
 		base = dt_mem_next_cell(dt_root_addr_cells, &dm);
-		flags = dm[3];
+		flags = of_read_number(&dm[3], 1);
 		/* skip DRC index, pad, assoc. list index, flags */
 		dm += 4;
 		/* skip this block if the reserved bit is set in flags (0x80)
-- 
cgit v1.2.3


From 08bc1dc51ffdaa453990a4cc300f1acf897d7817 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:29 +1000
Subject: powerpc: Make RTAS device tree accesses endian safe

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/rtas.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 80b5ef403f68..98b26afbcc24 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -204,7 +204,7 @@ void rtas_progress(char *s, unsigned short hex)
 {
 	struct device_node *root;
 	int width;
-	const int *p;
+	const __be32 *p;
 	char *os;
 	static int display_character, set_indicator;
 	static int display_width, display_lines, form_feed;
@@ -221,13 +221,13 @@ void rtas_progress(char *s, unsigned short hex)
 		if ((root = of_find_node_by_path("/rtas"))) {
 			if ((p = of_get_property(root,
 					"ibm,display-line-length", NULL)))
-				display_width = *p;
+				display_width = be32_to_cpu(*p);
 			if ((p = of_get_property(root,
 					"ibm,form-feed", NULL)))
-				form_feed = *p;
+				form_feed = be32_to_cpu(*p);
 			if ((p = of_get_property(root,
 					"ibm,display-number-of-lines", NULL)))
-				display_lines = *p;
+				display_lines = be32_to_cpu(*p);
 			row_width = of_get_property(root,
 					"ibm,display-truncation-length", NULL);
 			of_node_put(root);
@@ -322,11 +322,11 @@ EXPORT_SYMBOL(rtas_progress);		/* needed by rtas_flash module */
 
 int rtas_token(const char *service)
 {
-	const int *tokp;
+	const __be32 *tokp;
 	if (rtas.dev == NULL)
 		return RTAS_UNKNOWN_SERVICE;
 	tokp = of_get_property(rtas.dev, service, NULL);
-	return tokp ? *tokp : RTAS_UNKNOWN_SERVICE;
+	return tokp ? be32_to_cpu(*tokp) : RTAS_UNKNOWN_SERVICE;
 }
 EXPORT_SYMBOL(rtas_token);
 
@@ -588,8 +588,8 @@ bool rtas_indicator_present(int token, int *maxindex)
 {
 	int proplen, count, i;
 	const struct indicator_elem {
-		u32 token;
-		u32 maxindex;
+		__be32 token;
+		__be32 maxindex;
 	} *indicators;
 
 	indicators = of_get_property(rtas.dev, "rtas-indicators", &proplen);
@@ -599,10 +599,10 @@ bool rtas_indicator_present(int token, int *maxindex)
 	count = proplen / sizeof(struct indicator_elem);
 
 	for (i = 0; i < count; i++) {
-		if (indicators[i].token != token)
+		if (__be32_to_cpu(indicators[i].token) != token)
 			continue;
 		if (maxindex)
-			*maxindex = indicators[i].maxindex;
+			*maxindex = __be32_to_cpu(indicators[i].maxindex);
 		return true;
 	}
 
@@ -1097,19 +1097,19 @@ void __init rtas_initialize(void)
 	 */
 	rtas.dev = of_find_node_by_name(NULL, "rtas");
 	if (rtas.dev) {
-		const u32 *basep, *entryp, *sizep;
+		const __be32 *basep, *entryp, *sizep;
 
 		basep = of_get_property(rtas.dev, "linux,rtas-base", NULL);
 		sizep = of_get_property(rtas.dev, "rtas-size", NULL);
 		if (basep != NULL && sizep != NULL) {
-			rtas.base = *basep;
-			rtas.size = *sizep;
+			rtas.base = __be32_to_cpu(*basep);
+			rtas.size = __be32_to_cpu(*sizep);
 			entryp = of_get_property(rtas.dev,
 					"linux,rtas-entry", NULL);
 			if (entryp == NULL) /* Ugh */
 				rtas.entry = rtas.base;
 			else
-				rtas.entry = *entryp;
+				rtas.entry = __be32_to_cpu(*entryp);
 		} else
 			rtas.dev = NULL;
 	}
-- 
cgit v1.2.3


From 7946d5a513e510269d6e0126597f8667c886d0d7 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:30 +1000
Subject: powerpc: Make cache info device tree accesses endian safe

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/setup_64.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 9d5bae118d7e..45f2d1fac670 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -320,14 +320,14 @@ static void __init initialize_cache_info(void)
 		 * d-cache and i-cache sizes... -Peter
 		 */
 		if (num_cpus == 1) {
-			const u32 *sizep, *lsizep;
+			const __be32 *sizep, *lsizep;
 			u32 size, lsize;
 
 			size = 0;
 			lsize = cur_cpu_spec->dcache_bsize;
 			sizep = of_get_property(np, "d-cache-size", NULL);
 			if (sizep != NULL)
-				size = *sizep;
+				size = be32_to_cpu(*sizep);
 			lsizep = of_get_property(np, "d-cache-block-size",
 						 NULL);
 			/* fallback if block size missing */
@@ -336,7 +336,7 @@ static void __init initialize_cache_info(void)
 							 "d-cache-line-size",
 							 NULL);
 			if (lsizep != NULL)
-				lsize = *lsizep;
+				lsize = be32_to_cpu(*lsizep);
 			if (sizep == NULL || lsizep == NULL)
 				DBG("Argh, can't find dcache properties ! "
 				    "sizep: %p, lsizep: %p\n", sizep, lsizep);
@@ -350,7 +350,7 @@ static void __init initialize_cache_info(void)
 			lsize = cur_cpu_spec->icache_bsize;
 			sizep = of_get_property(np, "i-cache-size", NULL);
 			if (sizep != NULL)
-				size = *sizep;
+				size = be32_to_cpu(*sizep);
 			lsizep = of_get_property(np, "i-cache-block-size",
 						 NULL);
 			if (lsizep == NULL)
@@ -358,7 +358,7 @@ static void __init initialize_cache_info(void)
 							 "i-cache-line-size",
 							 NULL);
 			if (lsizep != NULL)
-				lsize = *lsizep;
+				lsize = be32_to_cpu(*lsizep);
 			if (sizep == NULL || lsizep == NULL)
 				DBG("Argh, can't find icache properties ! "
 				    "sizep: %p, lsizep: %p\n", sizep, lsizep);
-- 
cgit v1.2.3


From 271282649132f0a84ac8e2f3655cf2b5c192036b Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:31 +1000
Subject: powerpc: Make RTAS calls endian safe

RTAS expects arguments in the call buffer to be big endian so we
need to byteswap on little endian builds

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/rtas.h |  8 ++++----
 arch/powerpc/kernel/rtas.c      | 38 +++++++++++++++++++-------------------
 2 files changed, 23 insertions(+), 23 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index c7a8bfc9f6f5..9bd52c65e66f 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -44,12 +44,12 @@
  *
  */
 
-typedef u32 rtas_arg_t;
+typedef __be32 rtas_arg_t;
 
 struct rtas_args {
-	u32 token;
-	u32 nargs;
-	u32 nret; 
+	__be32 token;
+	__be32 nargs;
+	__be32 nret; 
 	rtas_arg_t args[16];
 	rtas_arg_t *rets;     /* Pointer to return values in args[]. */
 };  
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 98b26afbcc24..4cf674d7d5ae 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -91,7 +91,7 @@ static void unlock_rtas(unsigned long flags)
  * are designed only for very early low-level debugging, which
  * is why the token is hard-coded to 10.
  */
-static void call_rtas_display_status(char c)
+static void call_rtas_display_status(unsigned char c)
 {
 	struct rtas_args *args = &rtas.args;
 	unsigned long s;
@@ -100,11 +100,11 @@ static void call_rtas_display_status(char c)
 		return;
 	s = lock_rtas();
 
-	args->token = 10;
-	args->nargs = 1;
-	args->nret  = 1;
-	args->rets  = (rtas_arg_t *)&(args->args[1]);
-	args->args[0] = (unsigned char)c;
+	args->token = cpu_to_be32(10);
+	args->nargs = cpu_to_be32(1);
+	args->nret  = cpu_to_be32(1);
+	args->rets  = &(args->args[1]);
+	args->args[0] = cpu_to_be32(c);
 
 	enter_rtas(__pa(args));
 
@@ -380,11 +380,11 @@ static char *__fetch_rtas_last_error(char *altbuf)
 
 	bufsz = rtas_get_error_log_max();
 
-	err_args.token = rtas_last_error_token;
-	err_args.nargs = 2;
-	err_args.nret = 1;
-	err_args.args[0] = (rtas_arg_t)__pa(rtas_err_buf);
-	err_args.args[1] = bufsz;
+	err_args.token = cpu_to_be32(rtas_last_error_token);
+	err_args.nargs = cpu_to_be32(2);
+	err_args.nret = cpu_to_be32(1);
+	err_args.args[0] = cpu_to_be32(__pa(rtas_err_buf));
+	err_args.args[1] = cpu_to_be32(bufsz);
 	err_args.args[2] = 0;
 
 	save_args = rtas.args;
@@ -433,13 +433,13 @@ int rtas_call(int token, int nargs, int nret, int *outputs, ...)
 	s = lock_rtas();
 	rtas_args = &rtas.args;
 
-	rtas_args->token = token;
-	rtas_args->nargs = nargs;
-	rtas_args->nret  = nret;
-	rtas_args->rets  = (rtas_arg_t *)&(rtas_args->args[nargs]);
+	rtas_args->token = cpu_to_be32(token);
+	rtas_args->nargs = cpu_to_be32(nargs);
+	rtas_args->nret  = cpu_to_be32(nret);
+	rtas_args->rets  = &(rtas_args->args[nargs]);
 	va_start(list, outputs);
 	for (i = 0; i < nargs; ++i)
-		rtas_args->args[i] = va_arg(list, rtas_arg_t);
+		rtas_args->args[i] = cpu_to_be32(va_arg(list, __u32));
 	va_end(list);
 
 	for (i = 0; i < nret; ++i)
@@ -449,13 +449,13 @@ int rtas_call(int token, int nargs, int nret, int *outputs, ...)
 
 	/* A -1 return code indicates that the last command couldn't
 	   be completed due to a hardware error. */
-	if (rtas_args->rets[0] == -1)
+	if (be32_to_cpu(rtas_args->rets[0]) == -1)
 		buff_copy = __fetch_rtas_last_error(NULL);
 
 	if (nret > 1 && outputs != NULL)
 		for (i = 0; i < nret-1; ++i)
-			outputs[i] = rtas_args->rets[i+1];
-	ret = (nret > 0)? rtas_args->rets[0]: 0;
+			outputs[i] = be32_to_cpu(rtas_args->rets[i+1]);
+	ret = (nret > 0)? be32_to_cpu(rtas_args->rets[0]): 0;
 
 	unlock_rtas(s);
 
-- 
cgit v1.2.3


From ac13282dff13cd0f4da0f0ccb134bc29bfa10255 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:32 +1000
Subject: powerpc: Make logical to real cpu mapping code endian safe

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/setup-common.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 63d051f5b7a5..ee0e0553ae0e 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -436,7 +436,7 @@ void __init smp_setup_cpu_maps(void)
 	DBG("smp_setup_cpu_maps()\n");
 
 	while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) {
-		const int *intserv;
+		const __be32 *intserv;
 		int j, len;
 
 		DBG("  * %s...\n", dn->full_name);
@@ -456,9 +456,9 @@ void __init smp_setup_cpu_maps(void)
 
 		for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
 			DBG("    thread %d -> cpu %d (hard id %d)\n",
-			    j, cpu, intserv[j]);
+			    j, cpu, be32_to_cpu(intserv[j]));
 			set_cpu_present(cpu, true);
-			set_hard_smp_processor_id(cpu, intserv[j]);
+			set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j]));
 			set_cpu_possible(cpu, true);
 			cpu++;
 		}
-- 
cgit v1.2.3


From 43f88120270f63e71a4a9b389b8a806af4e40d23 Mon Sep 17 00:00:00 2001
From: Alistair Popple <alistair@popple.id.au>
Date: Wed, 7 Aug 2013 02:01:33 +1000
Subject: powerpc: More little endian fixes for setup-common.c

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/setup-common.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index ee0e0553ae0e..3d261c071fc8 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -437,6 +437,7 @@ void __init smp_setup_cpu_maps(void)
 
 	while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) {
 		const __be32 *intserv;
+		__be32 cpu_be;
 		int j, len;
 
 		DBG("  * %s...\n", dn->full_name);
@@ -450,8 +451,10 @@ void __init smp_setup_cpu_maps(void)
 		} else {
 			DBG("    no ibm,ppc-interrupt-server#s -> 1 thread\n");
 			intserv = of_get_property(dn, "reg", NULL);
-			if (!intserv)
-				intserv = &cpu;	/* assume logical == phys */
+			if (!intserv) {
+				cpu_be = cpu_to_be32(cpu);
+				intserv = &cpu_be;	/* assume logical == phys */
+			}
 		}
 
 		for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
-- 
cgit v1.2.3


From 6f7aba7bb4bd09824992cda7f77d4e8b1704a04c Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:34 +1000
Subject: powerpc: Add some endian annotations to time and xics code

Fix a couple of sparse warnings.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/time.c            | 2 +-
 arch/powerpc/sysdev/xics/icp-native.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 65ab9e909377..c863aa1f524a 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -612,7 +612,7 @@ unsigned long long sched_clock(void)
 static int __init get_freq(char *name, int cells, unsigned long *val)
 {
 	struct device_node *cpu;
-	const unsigned int *fp;
+	const __be32 *fp;
 	int found = 0;
 
 	/* The cpu node should have timebase and clock frequency properties */
diff --git a/arch/powerpc/sysdev/xics/icp-native.c b/arch/powerpc/sysdev/xics/icp-native.c
index 7cd728b3b5e4..9dee47071af8 100644
--- a/arch/powerpc/sysdev/xics/icp-native.c
+++ b/arch/powerpc/sysdev/xics/icp-native.c
@@ -216,7 +216,7 @@ static int __init icp_native_init_one_node(struct device_node *np,
 					   unsigned int *indx)
 {
 	unsigned int ilen;
-	const u32 *ireg;
+	const __be32 *ireg;
 	int i;
 	int reg_tuple_size;
 	int num_servers = 0;
-- 
cgit v1.2.3


From 2083f681e3898394dcf5fb3285bb385e21facb9a Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:36 +1000
Subject: powerpc: of_parse_dma_window should take a __be32 *dma_window

We pass dma_window to of_parse_dma_window as a void * and then
run through hoops to cast it back to a u32 array. In the process
we lose endian annotation.

Simplify it by just passing a __be32 * down.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/prom.h        |  5 +++--
 arch/powerpc/kernel/prom_parse.c       | 17 ++++++++---------
 arch/powerpc/kernel/vio.c              |  2 +-
 arch/powerpc/platforms/cell/iommu.c    |  2 +-
 arch/powerpc/platforms/pseries/iommu.c |  8 ++++----
 5 files changed, 17 insertions(+), 17 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index 3bac73ecc349..e6ec2cffba16 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -38,8 +38,9 @@ extern unsigned long pci_address_to_pio(phys_addr_t address);
 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
  * size parameters.
  */
-void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
-		unsigned long *busno, unsigned long *phys, unsigned long *size);
+void of_parse_dma_window(struct device_node *dn, const __be32 *dma_window,
+			 unsigned long *busno, unsigned long *phys,
+			 unsigned long *size);
 
 extern void kdump_move_device_tree(void);
 
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 4e1331b8eb33..6295e646f78c 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -7,28 +7,27 @@
 #include <linux/of_address.h>
 #include <asm/prom.h>
 
-void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
-		unsigned long *busno, unsigned long *phys, unsigned long *size)
+void of_parse_dma_window(struct device_node *dn, const __be32 *dma_window,
+			 unsigned long *busno, unsigned long *phys,
+			 unsigned long *size)
 {
-	const u32 *dma_window;
 	u32 cells;
-	const unsigned char *prop;
-
-	dma_window = dma_window_prop;
+	const __be32 *prop;
 
 	/* busno is always one cell */
-	*busno = *(dma_window++);
+	*busno = of_read_number(dma_window, 1);
+	dma_window++;
 
 	prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
 	if (!prop)
 		prop = of_get_property(dn, "#address-cells", NULL);
 
-	cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
+	cells = prop ? of_read_number(prop, 1) : of_n_addr_cells(dn);
 	*phys = of_read_number(dma_window, cells);
 
 	dma_window += cells;
 
 	prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
-	cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
+	cells = prop ? of_read_number(prop, 1) : of_n_size_cells(dn);
 	*size = of_read_number(dma_window, cells);
 }
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 536016d792ba..31875a6002b7 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1153,7 +1153,7 @@ EXPORT_SYMBOL(vio_h_cop_sync);
 
 static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
 {
-	const unsigned char *dma_window;
+	const __be32 *dma_window;
 	struct iommu_table *tbl;
 	unsigned long offset, size;
 
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index 946306b1bb4e..b53560660b72 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -697,7 +697,7 @@ static int __init cell_iommu_get_window(struct device_node *np,
 					 unsigned long *base,
 					 unsigned long *size)
 {
-	const void *dma_window;
+	const __be32 *dma_window;
 	unsigned long index;
 
 	/* Use ibm,dma-window if available, else, hard code ! */
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 23fc1dcf4434..9087f9768781 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -530,7 +530,7 @@ static void iommu_table_setparms(struct pci_controller *phb,
 static void iommu_table_setparms_lpar(struct pci_controller *phb,
 				      struct device_node *dn,
 				      struct iommu_table *tbl,
-				      const void *dma_window)
+				      const __be32 *dma_window)
 {
 	unsigned long offset, size;
 
@@ -630,7 +630,7 @@ static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus)
 	struct iommu_table *tbl;
 	struct device_node *dn, *pdn;
 	struct pci_dn *ppci;
-	const void *dma_window = NULL;
+	const __be32 *dma_window = NULL;
 
 	dn = pci_bus_to_OF_node(bus);
 
@@ -1152,7 +1152,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev)
 {
 	struct device_node *pdn, *dn;
 	struct iommu_table *tbl;
-	const void *dma_window = NULL;
+	const __be32 *dma_window = NULL;
 	struct pci_dn *pci;
 
 	pr_debug("pci_dma_dev_setup_pSeriesLP: %s\n", pci_name(dev));
@@ -1201,7 +1201,7 @@ static int dma_set_mask_pSeriesLP(struct device *dev, u64 dma_mask)
 	bool ddw_enabled = false;
 	struct device_node *pdn, *dn;
 	struct pci_dev *pdev;
-	const void *dma_window = NULL;
+	const __be32 *dma_window = NULL;
 	u64 dma_offset;
 
 	if (!dev->dma_mask)
-- 
cgit v1.2.3


From d10bd84f14b9a950d297ad8f7f6f22385ad914ba Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:37 +1000
Subject: powerpc: Make device tree accesses in cache info code endian safe

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/cacheinfo.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c
index 9262cf2bec4b..654932727873 100644
--- a/arch/powerpc/kernel/cacheinfo.c
+++ b/arch/powerpc/kernel/cacheinfo.c
@@ -196,7 +196,7 @@ static void cache_cpu_set(struct cache *cache, int cpu)
 static int cache_size(const struct cache *cache, unsigned int *ret)
 {
 	const char *propname;
-	const u32 *cache_size;
+	const __be32 *cache_size;
 
 	propname = cache_type_info[cache->type].size_prop;
 
@@ -204,7 +204,7 @@ static int cache_size(const struct cache *cache, unsigned int *ret)
 	if (!cache_size)
 		return -ENODEV;
 
-	*ret = *cache_size;
+	*ret = of_read_number(cache_size, 1);
 	return 0;
 }
 
@@ -222,7 +222,7 @@ static int cache_size_kb(const struct cache *cache, unsigned int *ret)
 /* not cache_line_size() because that's a macro in include/linux/cache.h */
 static int cache_get_line_size(const struct cache *cache, unsigned int *ret)
 {
-	const u32 *line_size;
+	const __be32 *line_size;
 	int i, lim;
 
 	lim = ARRAY_SIZE(cache_type_info[cache->type].line_size_props);
@@ -239,14 +239,14 @@ static int cache_get_line_size(const struct cache *cache, unsigned int *ret)
 	if (!line_size)
 		return -ENODEV;
 
-	*ret = *line_size;
+	*ret = of_read_number(line_size, 1);
 	return 0;
 }
 
 static int cache_nr_sets(const struct cache *cache, unsigned int *ret)
 {
 	const char *propname;
-	const u32 *nr_sets;
+	const __be32 *nr_sets;
 
 	propname = cache_type_info[cache->type].nr_sets_prop;
 
@@ -254,7 +254,7 @@ static int cache_nr_sets(const struct cache *cache, unsigned int *ret)
 	if (!nr_sets)
 		return -ENODEV;
 
-	*ret = *nr_sets;
+	*ret = of_read_number(nr_sets, 1);
 	return 0;
 }
 
-- 
cgit v1.2.3


From 493adffcb43ffd9f8f2d5485603574502fd9e01d Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Wed, 7 Aug 2013 02:01:38 +1000
Subject: powerpc: Make prom_init.c endian safe

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/prom_init.c | 253 +++++++++++++++++++++++-----------------
 1 file changed, 147 insertions(+), 106 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 57df5cb1dcc4..7b6391b68fb8 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -107,10 +107,10 @@ int of_workarounds;
 typedef u32 prom_arg_t;
 
 struct prom_args {
-        u32 service;
-        u32 nargs;
-        u32 nret;
-        prom_arg_t args[10];
+        __be32 service;
+        __be32 nargs;
+        __be32 nret;
+        __be32 args[10];
 };
 
 struct prom_t {
@@ -123,11 +123,11 @@ struct prom_t {
 };
 
 struct mem_map_entry {
-	u64	base;
-	u64	size;
+	__be64	base;
+	__be64	size;
 };
 
-typedef u32 cell_t;
+typedef __be32 cell_t;
 
 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
 		    unsigned long r6, unsigned long r7, unsigned long r8,
@@ -219,13 +219,13 @@ static int __init call_prom(const char *service, int nargs, int nret, ...)
 	struct prom_args args;
 	va_list list;
 
-	args.service = ADDR(service);
-	args.nargs = nargs;
-	args.nret = nret;
+	args.service = cpu_to_be32(ADDR(service));
+	args.nargs = cpu_to_be32(nargs);
+	args.nret = cpu_to_be32(nret);
 
 	va_start(list, nret);
 	for (i = 0; i < nargs; i++)
-		args.args[i] = va_arg(list, prom_arg_t);
+		args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
 	va_end(list);
 
 	for (i = 0; i < nret; i++)
@@ -234,7 +234,7 @@ static int __init call_prom(const char *service, int nargs, int nret, ...)
 	if (enter_prom(&args, prom_entry) < 0)
 		return PROM_ERROR;
 
-	return (nret > 0) ? args.args[nargs] : 0;
+	return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
 }
 
 static int __init call_prom_ret(const char *service, int nargs, int nret,
@@ -244,13 +244,13 @@ static int __init call_prom_ret(const char *service, int nargs, int nret,
 	struct prom_args args;
 	va_list list;
 
-	args.service = ADDR(service);
-	args.nargs = nargs;
-	args.nret = nret;
+	args.service = cpu_to_be32(ADDR(service));
+	args.nargs = cpu_to_be32(nargs);
+	args.nret = cpu_to_be32(nret);
 
 	va_start(list, rets);
 	for (i = 0; i < nargs; i++)
-		args.args[i] = va_arg(list, prom_arg_t);
+		args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
 	va_end(list);
 
 	for (i = 0; i < nret; i++)
@@ -261,9 +261,9 @@ static int __init call_prom_ret(const char *service, int nargs, int nret,
 
 	if (rets != NULL)
 		for (i = 1; i < nret; ++i)
-			rets[i-1] = args.args[nargs+i];
+			rets[i-1] = be32_to_cpu(args.args[nargs+i]);
 
-	return (nret > 0) ? args.args[nargs] : 0;
+	return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
 }
 
 
@@ -527,7 +527,7 @@ static int __init prom_setprop(phandle node, const char *nodename,
 #define islower(c)	('a' <= (c) && (c) <= 'z')
 #define toupper(c)	(islower(c) ? ((c) - 'a' + 'A') : (c))
 
-unsigned long prom_strtoul(const char *cp, const char **endp)
+static unsigned long prom_strtoul(const char *cp, const char **endp)
 {
 	unsigned long result = 0, base = 10, value;
 
@@ -552,7 +552,7 @@ unsigned long prom_strtoul(const char *cp, const char **endp)
 	return result;
 }
 
-unsigned long prom_memparse(const char *ptr, const char **retptr)
+static unsigned long prom_memparse(const char *ptr, const char **retptr)
 {
 	unsigned long ret = prom_strtoul(ptr, retptr);
 	int shift = 0;
@@ -724,7 +724,8 @@ unsigned char ibm_architecture_vec[] = {
 
 };
 
-/* Old method - ELF header with PT_NOTE sections */
+/* Old method - ELF header with PT_NOTE sections only works on BE */
+#ifdef __BIG_ENDIAN__
 static struct fake_elf {
 	Elf32_Ehdr	elfhdr;
 	Elf32_Phdr	phdr[2];
@@ -810,6 +811,7 @@ static struct fake_elf {
 		}
 	}
 };
+#endif /* __BIG_ENDIAN__ */
 
 static int __init prom_count_smt_threads(void)
 {
@@ -852,9 +854,9 @@ static int __init prom_count_smt_threads(void)
 
 static void __init prom_send_capabilities(void)
 {
-	ihandle elfloader, root;
+	ihandle root;
 	prom_arg_t ret;
-	u32 *cores;
+	__be32 *cores;
 
 	root = call_prom("open", 1, 1, ADDR("/"));
 	if (root != 0) {
@@ -864,15 +866,15 @@ static void __init prom_send_capabilities(void)
 		 * (we assume this is the same for all cores) and use it to
 		 * divide NR_CPUS.
 		 */
-		cores = (u32 *)&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET];
-		if (*cores != NR_CPUS) {
+		cores = (__be32 *)&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET];
+		if (be32_to_cpup(cores) != NR_CPUS) {
 			prom_printf("WARNING ! "
 				    "ibm_architecture_vec structure inconsistent: %lu!\n",
-				    *cores);
+				    be32_to_cpup(cores));
 		} else {
-			*cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
+			*cores = cpu_to_be32(DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()));
 			prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
-				    *cores, NR_CPUS);
+				    be32_to_cpup(cores), NR_CPUS);
 		}
 
 		/* try calling the ibm,client-architecture-support method */
@@ -893,17 +895,24 @@ static void __init prom_send_capabilities(void)
 		prom_printf(" not implemented\n");
 	}
 
-	/* no ibm,client-architecture-support call, try the old way */
-	elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
-	if (elfloader == 0) {
-		prom_printf("couldn't open /packages/elf-loader\n");
-		return;
+#ifdef __BIG_ENDIAN__
+	{
+		ihandle elfloader;
+
+		/* no ibm,client-architecture-support call, try the old way */
+		elfloader = call_prom("open", 1, 1,
+				      ADDR("/packages/elf-loader"));
+		if (elfloader == 0) {
+			prom_printf("couldn't open /packages/elf-loader\n");
+			return;
+		}
+		call_prom("call-method", 3, 1, ADDR("process-elf-header"),
+			  elfloader, ADDR(&fake_elf));
+		call_prom("close", 1, 0, elfloader);
 	}
-	call_prom("call-method", 3, 1, ADDR("process-elf-header"),
-			elfloader, ADDR(&fake_elf));
-	call_prom("close", 1, 0, elfloader);
+#endif /* __BIG_ENDIAN__ */
 }
-#endif
+#endif /* #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
 
 /*
  * Memory allocation strategy... our layout is normally:
@@ -1050,11 +1059,11 @@ static unsigned long __init prom_next_cell(int s, cell_t **cellp)
 		p++;
 		s--;
 	}
-	r = *p++;
+	r = be32_to_cpu(*p++);
 #ifdef CONFIG_PPC64
 	if (s > 1) {
 		r <<= 32;
-		r |= *(p++);
+		r |= be32_to_cpu(*(p++));
 	}
 #endif
 	*cellp = p;
@@ -1087,8 +1096,8 @@ static void __init reserve_mem(u64 base, u64 size)
 
 	if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
 		prom_panic("Memory reserve map exhausted !\n");
-	mem_reserve_map[cnt].base = base;
-	mem_reserve_map[cnt].size = size;
+	mem_reserve_map[cnt].base = cpu_to_be64(base);
+	mem_reserve_map[cnt].size = cpu_to_be64(size);
 	mem_reserve_cnt = cnt + 1;
 }
 
@@ -1102,6 +1111,7 @@ static void __init prom_init_mem(void)
 	char *path, type[64];
 	unsigned int plen;
 	cell_t *p, *endp;
+	__be32 val;
 	u32 rac, rsc;
 
 	/*
@@ -1109,12 +1119,14 @@ static void __init prom_init_mem(void)
 	 * 1) top of RMO (first node)
 	 * 2) top of memory
 	 */
-	rac = 2;
-	prom_getprop(prom.root, "#address-cells", &rac, sizeof(rac));
-	rsc = 1;
-	prom_getprop(prom.root, "#size-cells", &rsc, sizeof(rsc));
-	prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
-	prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
+	val = cpu_to_be32(2);
+	prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
+	rac = be32_to_cpu(val);
+	val = cpu_to_be32(1);
+	prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
+	rsc = be32_to_cpu(val);
+	prom_debug("root_addr_cells: %x\n", rac);
+	prom_debug("root_size_cells: %x\n", rsc);
 
 	prom_debug("scanning memory:\n");
 	path = prom_scratch;
@@ -1222,25 +1234,23 @@ static void __init prom_init_mem(void)
 
 static void __init prom_close_stdin(void)
 {
-	ihandle val;
+	__be32 val;
+	ihandle stdin;
 
-	if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0)
-		call_prom("close", 1, 0, val);
+	if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
+		stdin = be32_to_cpu(val);
+		call_prom("close", 1, 0, stdin);
+	}
 }
 
 #ifdef CONFIG_PPC_POWERNV
 
-static u64 __initdata prom_opal_size;
-static u64 __initdata prom_opal_align;
-static int __initdata prom_rtas_start_cpu;
-static u64 __initdata prom_rtas_data;
-static u64 __initdata prom_rtas_entry;
-
 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
 static u64 __initdata prom_opal_base;
 static u64 __initdata prom_opal_entry;
 #endif
 
+#ifdef __BIG_ENDIAN__
 /* XXX Don't change this structure without updating opal-takeover.S */
 static struct opal_secondary_data {
 	s64				ack;	/*  0 */
@@ -1248,6 +1258,12 @@ static struct opal_secondary_data {
 	struct opal_takeover_args	args;	/* 16 */
 } opal_secondary_data;
 
+static u64 __initdata prom_opal_align;
+static u64 __initdata prom_opal_size;
+static int __initdata prom_rtas_start_cpu;
+static u64 __initdata prom_rtas_data;
+static u64 __initdata prom_rtas_entry;
+
 extern char opal_secondary_entry;
 
 static void __init prom_query_opal(void)
@@ -1265,6 +1281,7 @@ static void __init prom_query_opal(void)
 	}
 
 	prom_printf("Querying for OPAL presence... ");
+
 	rc = opal_query_takeover(&prom_opal_size,
 				 &prom_opal_align);
 	prom_debug("(rc = %ld) ", rc);
@@ -1425,6 +1442,7 @@ static void __init prom_opal_takeover(void)
 	for (;;)
 		opal_do_takeover(args);
 }
+#endif /* __BIG_ENDIAN__ */
 
 /*
  * Allocate room for and instantiate OPAL
@@ -1435,6 +1453,7 @@ static void __init prom_instantiate_opal(void)
 	ihandle opal_inst;
 	u64 base, entry;
 	u64 size = 0, align = 0x10000;
+	__be64 val64;
 	u32 rets[2];
 
 	prom_debug("prom_instantiate_opal: start...\n");
@@ -1444,11 +1463,14 @@ static void __init prom_instantiate_opal(void)
 	if (!PHANDLE_VALID(opal_node))
 		return;
 
-	prom_getprop(opal_node, "opal-runtime-size", &size, sizeof(size));
+	val64 = 0;
+	prom_getprop(opal_node, "opal-runtime-size", &val64, sizeof(val64));
+	size = be64_to_cpu(val64);
 	if (size == 0)
 		return;
-	prom_getprop(opal_node, "opal-runtime-alignment", &align,
-		     sizeof(align));
+	val64 = 0;
+	prom_getprop(opal_node, "opal-runtime-alignment", &val64,sizeof(val64));
+	align = be64_to_cpu(val64);
 
 	base = alloc_down(size, align, 0);
 	if (base == 0) {
@@ -1505,6 +1527,7 @@ static void __init prom_instantiate_rtas(void)
 	phandle rtas_node;
 	ihandle rtas_inst;
 	u32 base, entry = 0;
+	__be32 val;
 	u32 size = 0;
 
 	prom_debug("prom_instantiate_rtas: start...\n");
@@ -1514,7 +1537,9 @@ static void __init prom_instantiate_rtas(void)
 	if (!PHANDLE_VALID(rtas_node))
 		return;
 
-	prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
+	val = 0;
+	prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
+	size = be32_to_cpu(val);
 	if (size == 0)
 		return;
 
@@ -1541,12 +1566,14 @@ static void __init prom_instantiate_rtas(void)
 
 	reserve_mem(base, size);
 
+	val = cpu_to_be32(base);
 	prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
-		     &base, sizeof(base));
+		     &val, sizeof(val));
+	val = cpu_to_be32(entry);
 	prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
-		     &entry, sizeof(entry));
+		     &val, sizeof(val));
 
-#ifdef CONFIG_PPC_POWERNV
+#if defined(CONFIG_PPC_POWERNV) && defined(__BIG_ENDIAN__)
 	/* PowerVN takeover hack */
 	prom_rtas_data = base;
 	prom_rtas_entry = entry;
@@ -1620,6 +1647,7 @@ static void __init prom_instantiate_sml(void)
 /*
  * Allocate room for and initialize TCE tables
  */
+#ifdef __BIG_ENDIAN__
 static void __init prom_initialize_tce_table(void)
 {
 	phandle node;
@@ -1748,7 +1776,8 @@ static void __init prom_initialize_tce_table(void)
 	/* Flag the first invalid entry */
 	prom_debug("ending prom_initialize_tce_table\n");
 }
-#endif
+#endif /* __BIG_ENDIAN__ */
+#endif /* CONFIG_PPC64 */
 
 /*
  * With CHRP SMP we need to use the OF to start the other processors.
@@ -1777,7 +1806,6 @@ static void __init prom_initialize_tce_table(void)
 static void __init prom_hold_cpus(void)
 {
 	unsigned long i;
-	unsigned int reg;
 	phandle node;
 	char type[64];
 	unsigned long *spinloop
@@ -1803,6 +1831,9 @@ static void __init prom_hold_cpus(void)
 
 	/* look for cpus */
 	for (node = 0; prom_next_node(&node); ) {
+		unsigned int cpu_no;
+		__be32 reg;
+
 		type[0] = 0;
 		prom_getprop(node, "device_type", type, sizeof(type));
 		if (strcmp(type, "cpu") != 0)
@@ -1813,10 +1844,11 @@ static void __init prom_hold_cpus(void)
 			if (strcmp(type, "okay") != 0)
 				continue;
 
-		reg = -1;
+		reg = cpu_to_be32(-1); /* make sparse happy */
 		prom_getprop(node, "reg", &reg, sizeof(reg));
+		cpu_no = be32_to_cpu(reg);
 
-		prom_debug("cpu hw idx   = %lu\n", reg);
+		prom_debug("cpu hw idx   = %lu\n", cpu_no);
 
 		/* Init the acknowledge var which will be reset by
 		 * the secondary cpu when it awakens from its OF
@@ -1824,24 +1856,24 @@ static void __init prom_hold_cpus(void)
 		 */
 		*acknowledge = (unsigned long)-1;
 
-		if (reg != prom.cpu) {
+		if (cpu_no != prom.cpu) {
 			/* Primary Thread of non-boot cpu or any thread */
-			prom_printf("starting cpu hw idx %lu... ", reg);
+			prom_printf("starting cpu hw idx %lu... ", cpu_no);
 			call_prom("start-cpu", 3, 0, node,
-				  secondary_hold, reg);
+				  secondary_hold, cpu_no);
 
 			for (i = 0; (i < 100000000) && 
 			     (*acknowledge == ((unsigned long)-1)); i++ )
 				mb();
 
-			if (*acknowledge == reg)
+			if (*acknowledge == cpu_no)
 				prom_printf("done\n");
 			else
 				prom_printf("failed: %x\n", *acknowledge);
 		}
 #ifdef CONFIG_SMP
 		else
-			prom_printf("boot cpu hw idx %lu\n", reg);
+			prom_printf("boot cpu hw idx %lu\n", cpu_no);
 #endif /* CONFIG_SMP */
 	}
 
@@ -1895,6 +1927,7 @@ static void __init prom_find_mmu(void)
 	prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
 	prom_getprop(prom.chosen, "mmu", &prom.mmumap,
 		     sizeof(prom.mmumap));
+	prom.mmumap = be32_to_cpu(prom.mmumap);
 	if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
 		of_workarounds &= ~OF_WA_CLAIM;		/* hmmm */
 }
@@ -1906,17 +1939,19 @@ static void __init prom_init_stdout(void)
 {
 	char *path = of_stdout_device;
 	char type[16];
-	u32 val;
+	phandle stdout_node;
+	__be32 val;
 
 	if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
 		prom_panic("cannot find stdout");
 
-	prom.stdout = val;
+	prom.stdout = be32_to_cpu(val);
 
 	/* Get the full OF pathname of the stdout device */
 	memset(path, 0, 256);
 	call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
-	val = call_prom("instance-to-package", 1, 1, prom.stdout);
+	stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
+	val = cpu_to_be32(stdout_node);
 	prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
 		     &val, sizeof(val));
 	prom_printf("OF stdout device is: %s\n", of_stdout_device);
@@ -1925,9 +1960,9 @@ static void __init prom_init_stdout(void)
 
 	/* If it's a display, note it */
 	memset(type, 0, sizeof(type));
-	prom_getprop(val, "device_type", type, sizeof(type));
+	prom_getprop(stdout_node, "device_type", type, sizeof(type));
 	if (strcmp(type, "display") == 0)
-		prom_setprop(val, path, "linux,boot-display", NULL, 0);
+		prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
 }
 
 static int __init prom_find_machine_type(void)
@@ -2133,8 +2168,10 @@ static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
 	return ret;
 }
 
-#define dt_push_token(token, mem_start, mem_end) \
-	do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
+#define dt_push_token(token, mem_start, mem_end) do { 			\
+		void *room = make_room(mem_start, mem_end, 4, 4);	\
+		*(__be32 *)room = cpu_to_be32(token);			\
+	} while(0)
 
 static unsigned long __init dt_find_string(char *str)
 {
@@ -2307,7 +2344,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 			dt_push_token(4, mem_start, mem_end);
 			dt_push_token(soff, mem_start, mem_end);
 			valp = make_room(mem_start, mem_end, 4, 4);
-			*(u32 *)valp = node;
+			*(__be32 *)valp = cpu_to_be32(node);
 		}
 	}
 
@@ -2380,16 +2417,16 @@ static void __init flatten_device_tree(void)
 	dt_struct_end = PAGE_ALIGN(mem_start);
 
 	/* Finish header */
-	hdr->boot_cpuid_phys = prom.cpu;
-	hdr->magic = OF_DT_HEADER;
-	hdr->totalsize = dt_struct_end - dt_header_start;
-	hdr->off_dt_struct = dt_struct_start - dt_header_start;
-	hdr->off_dt_strings = dt_string_start - dt_header_start;
-	hdr->dt_strings_size = dt_string_end - dt_string_start;
-	hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - dt_header_start;
-	hdr->version = OF_DT_VERSION;
+	hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
+	hdr->magic = cpu_to_be32(OF_DT_HEADER);
+	hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
+	hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
+	hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
+	hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
+	hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
+	hdr->version = cpu_to_be32(OF_DT_VERSION);
 	/* Version 16 is not backward compatible */
-	hdr->last_comp_version = 0x10;
+	hdr->last_comp_version = cpu_to_be32(0x10);
 
 	/* Copy the reserve map in */
 	memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
@@ -2400,8 +2437,8 @@ static void __init flatten_device_tree(void)
 		prom_printf("reserved memory map:\n");
 		for (i = 0; i < mem_reserve_cnt; i++)
 			prom_printf("  %x - %x\n",
-				    mem_reserve_map[i].base,
-				    mem_reserve_map[i].size);
+				    be64_to_cpu(mem_reserve_map[i].base),
+				    be64_to_cpu(mem_reserve_map[i].size));
 	}
 #endif
 	/* Bump mem_reserve_cnt to cause further reservations to fail
@@ -2413,7 +2450,6 @@ static void __init flatten_device_tree(void)
 		    dt_string_start, dt_string_end);
 	prom_printf("Device tree struct  0x%x -> 0x%x\n",
 		    dt_struct_start, dt_struct_end);
-
 }
 
 #ifdef CONFIG_PPC_MAPLE
@@ -2746,18 +2782,19 @@ static void __init fixup_device_tree(void)
 
 static void __init prom_find_boot_cpu(void)
 {
-	u32 getprop_rval;
+	__be32 rval;
 	ihandle prom_cpu;
 	phandle cpu_pkg;
 
-	prom.cpu = 0;
-	if (prom_getprop(prom.chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
+	rval = 0;
+	if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
 		return;
+	prom_cpu = be32_to_cpu(rval);
 
 	cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
 
-	prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
-	prom.cpu = getprop_rval;
+	prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
+	prom.cpu = be32_to_cpu(rval);
 
 	prom_debug("Booting CPU hw index = %lu\n", prom.cpu);
 }
@@ -2766,15 +2803,15 @@ static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
 {
 #ifdef CONFIG_BLK_DEV_INITRD
 	if (r3 && r4 && r4 != 0xdeadbeef) {
-		unsigned long val;
+		__be64 val;
 
 		prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
 		prom_initrd_end = prom_initrd_start + r4;
 
-		val = prom_initrd_start;
+		val = cpu_to_be64(prom_initrd_start);
 		prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
 			     &val, sizeof(val));
-		val = prom_initrd_end;
+		val = cpu_to_be64(prom_initrd_end);
 		prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
 			     &val, sizeof(val));
 
@@ -2931,7 +2968,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	 */
 	prom_check_displays();
 
-#ifdef CONFIG_PPC64
+#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
 	/*
 	 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
 	 * that uses the allocator, we need to make sure we get the top of memory
@@ -2950,6 +2987,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 		prom_instantiate_rtas();
 
 #ifdef CONFIG_PPC_POWERNV
+#ifdef __BIG_ENDIAN__
 	/* Detect HAL and try instanciating it & doing takeover */
 	if (of_platform == PLATFORM_PSERIES_LPAR) {
 		prom_query_opal();
@@ -2957,9 +2995,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 			prom_opal_hold_cpus();
 			prom_opal_takeover();
 		}
-	} else if (of_platform == PLATFORM_OPAL)
+	} else
+#endif /* __BIG_ENDIAN__ */
+	if (of_platform == PLATFORM_OPAL)
 		prom_instantiate_opal();
-#endif
+#endif /* CONFIG_PPC_POWERNV */
 
 #ifdef CONFIG_PPC64
 	/* instantiate sml */
@@ -2978,10 +3018,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	/*
 	 * Fill in some infos for use by the kernel later on
 	 */
-	if (prom_memory_limit)
+	if (prom_memory_limit) {
+		__be64 val = cpu_to_be64(prom_memory_limit);
 		prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
-			     &prom_memory_limit,
-			     sizeof(prom_memory_limit));
+			     &val, sizeof(val));
+	}
 #ifdef CONFIG_PPC64
 	if (prom_iommu_off)
 		prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
-- 
cgit v1.2.3


From 7560d32757392f91a1b5714c309add266b336c5a Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:40 +1000
Subject: powerpc: Make device tree accesses in VIO subsystem endian safe

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/vio.c | 31 +++++++++++++++++--------------
 1 file changed, 17 insertions(+), 14 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 31875a6002b7..78a350670de3 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1312,8 +1312,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
 {
 	struct vio_dev *viodev;
 	struct device_node *parent_node;
-	const unsigned int *unit_address;
-	const unsigned int *pfo_resid = NULL;
+	const __be32 *prop;
 	enum vio_dev_family family;
 	const char *of_node_name = of_node->name ? of_node->name : "<unknown>";
 
@@ -1360,6 +1359,8 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
 	/* we need the 'device_type' property, in order to match with drivers */
 	viodev->family = family;
 	if (viodev->family == VDEVICE) {
+		unsigned int unit_address;
+
 		if (of_node->type != NULL)
 			viodev->type = of_node->type;
 		else {
@@ -1368,24 +1369,24 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
 			goto out;
 		}
 
-		unit_address = of_get_property(of_node, "reg", NULL);
-		if (unit_address == NULL) {
+		prop = of_get_property(of_node, "reg", NULL);
+		if (prop == NULL) {
 			pr_warn("%s: node %s missing 'reg'\n",
 					__func__, of_node_name);
 			goto out;
 		}
-		dev_set_name(&viodev->dev, "%x", *unit_address);
+		unit_address = of_read_number(prop, 1);
+		dev_set_name(&viodev->dev, "%x", unit_address);
 		viodev->irq = irq_of_parse_and_map(of_node, 0);
-		viodev->unit_address = *unit_address;
+		viodev->unit_address = unit_address;
 	} else {
 		/* PFO devices need their resource_id for submitting COP_OPs
 		 * This is an optional field for devices, but is required when
 		 * performing synchronous ops */
-		pfo_resid = of_get_property(of_node, "ibm,resource-id", NULL);
-		if (pfo_resid != NULL)
-			viodev->resource_id = *pfo_resid;
+		prop = of_get_property(of_node, "ibm,resource-id", NULL);
+		if (prop != NULL)
+			viodev->resource_id = of_read_number(prop, 1);
 
-		unit_address = NULL;
 		dev_set_name(&viodev->dev, "%s", of_node_name);
 		viodev->type = of_node_name;
 		viodev->irq = 0;
@@ -1622,7 +1623,6 @@ static struct vio_dev *vio_find_name(const char *name)
  */
 struct vio_dev *vio_find_node(struct device_node *vnode)
 {
-	const uint32_t *unit_address;
 	char kobj_name[20];
 	struct device_node *vnode_parent;
 	const char *dev_type;
@@ -1638,10 +1638,13 @@ struct vio_dev *vio_find_node(struct device_node *vnode)
 
 	/* construct the kobject name from the device node */
 	if (!strcmp(dev_type, "vdevice")) {
-		unit_address = of_get_property(vnode, "reg", NULL);
-		if (!unit_address)
+		const __be32 *prop;
+		
+		prop = of_get_property(vnode, "reg", NULL);
+		if (!prop)
 			return NULL;
-		snprintf(kobj_name, sizeof(kobj_name), "%x", *unit_address);
+		snprintf(kobj_name, sizeof(kobj_name), "%x",
+			 (uint32_t)of_read_number(prop, 1));
 	} else if (!strcmp(dev_type, "ibm,platform-facilities"))
 		snprintf(kobj_name, sizeof(kobj_name), "%s", vnode->name);
 	else
-- 
cgit v1.2.3


From a795dc548a973ff2a124a800718f0c99bcf78ea2 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:41 +1000
Subject: powerpc: Make OF PCI device tree accesses endian safe

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/pci-common.c  |  6 +++---
 arch/powerpc/kernel/pci_of_scan.c | 23 +++++++++++++----------
 2 files changed, 16 insertions(+), 13 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index ec6c9db7b392..eae0ee00ca25 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -667,7 +667,7 @@ void pci_resource_to_user(const struct pci_dev *dev, int bar,
 void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 				  struct device_node *dev, int primary)
 {
-	const u32 *ranges;
+	const __be32 *ranges;
 	int rlen;
 	int pna = of_n_addr_cells(dev);
 	int np = pna + 5;
@@ -687,7 +687,7 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 	/* Parse it */
 	while ((rlen -= np * 4) >= 0) {
 		/* Read next ranges element */
-		pci_space = ranges[0];
+		pci_space = of_read_number(ranges, 1);
 		pci_addr = of_read_number(ranges + 1, 2);
 		cpu_addr = of_translate_address(dev, ranges + 3);
 		size = of_read_number(ranges + pna + 3, 2);
@@ -704,7 +704,7 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 		/* Now consume following elements while they are contiguous */
 		for (; rlen >= np * sizeof(u32);
 		     ranges += np, rlen -= np * 4) {
-			if (ranges[0] != pci_space)
+			if (of_read_number(ranges, 1) != pci_space)
 				break;
 			pci_next = of_read_number(ranges + 1, 2);
 			cpu_next = of_translate_address(dev, ranges + 3);
diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
index 15d9105323bf..4368ec6fdc8c 100644
--- a/arch/powerpc/kernel/pci_of_scan.c
+++ b/arch/powerpc/kernel/pci_of_scan.c
@@ -24,12 +24,12 @@
  */
 static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
 {
-	const u32 *prop;
+	const __be32 *prop;
 	int len;
 
 	prop = of_get_property(np, name, &len);
 	if (prop && len >= 4)
-		return *prop;
+		return of_read_number(prop, 1);
 	return def;
 }
 
@@ -77,7 +77,7 @@ static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev)
 	unsigned int flags;
 	struct pci_bus_region region;
 	struct resource *res;
-	const u32 *addrs;
+	const __be32 *addrs;
 	u32 i;
 	int proplen;
 
@@ -86,14 +86,14 @@ static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev)
 		return;
 	pr_debug("    parse addresses (%d bytes) @ %p\n", proplen, addrs);
 	for (; proplen >= 20; proplen -= 20, addrs += 5) {
-		flags = pci_parse_of_flags(addrs[0], 0);
+		flags = pci_parse_of_flags(of_read_number(addrs, 1), 0);
 		if (!flags)
 			continue;
 		base = of_read_number(&addrs[1], 2);
 		size = of_read_number(&addrs[3], 2);
 		if (!size)
 			continue;
-		i = addrs[0] & 0xff;
+		i = of_read_number(addrs, 1) & 0xff;
 		pr_debug("  base: %llx, size: %llx, i: %x\n",
 			 (unsigned long long)base,
 			 (unsigned long long)size, i);
@@ -207,7 +207,7 @@ void of_scan_pci_bridge(struct pci_dev *dev)
 {
 	struct device_node *node = dev->dev.of_node;
 	struct pci_bus *bus;
-	const u32 *busrange, *ranges;
+	const __be32 *busrange, *ranges;
 	int len, i, mode;
 	struct pci_bus_region region;
 	struct resource *res;
@@ -230,9 +230,11 @@ void of_scan_pci_bridge(struct pci_dev *dev)
 		return;
 	}
 
-	bus = pci_find_bus(pci_domain_nr(dev->bus), busrange[0]);
+	bus = pci_find_bus(pci_domain_nr(dev->bus),
+			   of_read_number(busrange, 1));
 	if (!bus) {
-		bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
+		bus = pci_add_new_bus(dev->bus, dev,
+				      of_read_number(busrange, 1));
 		if (!bus) {
 			printk(KERN_ERR "Failed to create pci bus for %s\n",
 			       node->full_name);
@@ -241,7 +243,8 @@ void of_scan_pci_bridge(struct pci_dev *dev)
 	}
 
 	bus->primary = dev->bus->number;
-	pci_bus_insert_busn_res(bus, busrange[0], busrange[1]);
+	pci_bus_insert_busn_res(bus, of_read_number(busrange, 1),
+				of_read_number(busrange+1, 1));
 	bus->bridge_ctl = 0;
 
 	/* parse ranges property */
@@ -254,7 +257,7 @@ void of_scan_pci_bridge(struct pci_dev *dev)
 	}
 	i = 1;
 	for (; len >= 32; len -= 32, ranges += 8) {
-		flags = pci_parse_of_flags(ranges[0], 1);
+		flags = pci_parse_of_flags(of_read_number(ranges, 1), 1);
 		size = of_read_number(&ranges[6], 2);
 		if (flags == 0 || size == 0)
 			continue;
-- 
cgit v1.2.3


From c6296b962702d73413a66a544490c275bc0f4300 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:42 +1000
Subject: powerpc: Make PCI device node device tree accesses endian safe

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/pci_dn.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index df038442548a..1f61fab59d9b 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -47,9 +47,8 @@ struct pci_dn *pci_get_pdn(struct pci_dev *pdev)
 void *update_dn_pci_info(struct device_node *dn, void *data)
 {
 	struct pci_controller *phb = data;
-	const int *type =
-		of_get_property(dn, "ibm,pci-config-space-type", NULL);
-	const u32 *regs;
+	const __be32 *type = of_get_property(dn, "ibm,pci-config-space-type", NULL);
+	const __be32 *regs;
 	struct pci_dn *pdn;
 
 	pdn = zalloc_maybe_bootmem(sizeof(*pdn), GFP_KERNEL);
@@ -63,12 +62,14 @@ void *update_dn_pci_info(struct device_node *dn, void *data)
 #endif
 	regs = of_get_property(dn, "reg", NULL);
 	if (regs) {
+		u32 addr = of_read_number(regs, 1);
+
 		/* First register entry is addr (00BBSS00)  */
-		pdn->busno = (regs[0] >> 16) & 0xff;
-		pdn->devfn = (regs[0] >> 8) & 0xff;
+		pdn->busno = (addr >> 16) & 0xff;
+		pdn->devfn = (addr >> 8) & 0xff;
 	}
 
-	pdn->pci_ext_config_space = (type && *type == 1);
+	pdn->pci_ext_config_space = (type && of_read_number(type, 1) == 1);
 	return NULL;
 }
 
@@ -98,12 +99,13 @@ void *traverse_pci_devices(struct device_node *start, traverse_func pre,
 
 	/* We started with a phb, iterate all childs */
 	for (dn = start->child; dn; dn = nextdn) {
-		const u32 *classp;
-		u32 class;
+		const __be32 *classp;
+		u32 class = 0;
 
 		nextdn = NULL;
 		classp = of_get_property(dn, "class-code", NULL);
-		class = classp ? *classp : 0;
+		if (classp)
+			class = of_read_number(classp, 1);
 
 		if (pre && ((ret = pre(dn, data)) != NULL))
 			return ret;
-- 
cgit v1.2.3


From 4a396dc6faa1d8c5b2a079d2018791934e7492b1 Mon Sep 17 00:00:00 2001
From: Alistair Popple <alistair@popple.id.au>
Date: Wed, 7 Aug 2013 02:01:43 +1000
Subject: powerpc: Little endian fixes for legacy_serial.c

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/legacy_serial.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index c9c469f3c5c3..22e88dd2f34a 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -152,7 +152,7 @@ static int __init add_legacy_soc_port(struct device_node *np,
 				      struct device_node *soc_dev)
 {
 	u64 addr;
-	const u32 *addrp;
+	const __be32 *addrp;
 	upf_t flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ
 		| UPF_FIXED_PORT;
 	struct device_node *tsi = of_get_parent(np);
@@ -242,7 +242,7 @@ static int __init add_legacy_pci_port(struct device_node *np,
 				      struct device_node *pci_dev)
 {
 	u64 addr, base;
-	const u32 *addrp;
+	const __be32 *addrp;
 	unsigned int flags;
 	int iotype, index = -1, lindex = 0;
 
@@ -275,7 +275,7 @@ static int __init add_legacy_pci_port(struct device_node *np,
 	if (iotype == UPIO_MEM)
 		base = addr;
 	else
-		base = addrp[2];
+		base = of_read_number(&addrp[2], 1);
 
 	/* Try to guess an index... If we have subdevices of the pci dev,
 	 * we get to their "reg" property
-- 
cgit v1.2.3


From 7ffcf8ec26f4b94b95b1297131d223b121d951e5 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:46 +1000
Subject: powerpc: Fix little endian lppaca, slb_shadow and dtl_entry

The lppaca, slb_shadow and dtl_entry hypervisor structures are
big endian, so we have to byte swap them in little endian builds.

LE KVM hosts will also need to be fixed but for now add an #error
to remind us.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/asm-compat.h           |  9 +++++++++
 arch/powerpc/include/asm/ppc_asm.h              |  3 ++-
 arch/powerpc/kernel/entry_64.S                  | 11 +++++++----
 arch/powerpc/kernel/lparcfg.c                   |  9 +++++----
 arch/powerpc/kernel/paca.c                      | 10 +++++-----
 arch/powerpc/kernel/time.c                      | 16 ++++++++--------
 arch/powerpc/kvm/book3s_64_slb.S                |  4 ++++
 arch/powerpc/kvm/book3s_hv_rmhandlers.S         |  4 ++++
 arch/powerpc/lib/locks.c                        |  4 ++--
 arch/powerpc/mm/fault.c                         |  6 +++++-
 arch/powerpc/mm/slb.c                           |  9 ++++++---
 arch/powerpc/platforms/pseries/dtl.c            |  2 +-
 arch/powerpc/platforms/pseries/lpar.c           |  2 +-
 arch/powerpc/platforms/pseries/processor_idle.c |  6 +++++-
 arch/powerpc/platforms/pseries/setup.c          |  2 +-
 15 files changed, 65 insertions(+), 32 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/include/asm/asm-compat.h b/arch/powerpc/include/asm/asm-compat.h
index 6e82f5f9a6fd..4b237aa35660 100644
--- a/arch/powerpc/include/asm/asm-compat.h
+++ b/arch/powerpc/include/asm/asm-compat.h
@@ -32,6 +32,15 @@
 #define PPC_MTOCRF(FXM, RS) MTOCRF((FXM), RS)
 #define PPC_LR_STKOFF	16
 #define PPC_MIN_STKFRM	112
+
+#ifdef __BIG_ENDIAN__
+#define LDX_BE	stringify_in_c(ldx)
+#define STDX_BE	stringify_in_c(stdx)
+#else
+#define LDX_BE	stringify_in_c(ldbrx)
+#define STDX_BE	stringify_in_c(stdbrx)
+#endif
+
 #else /* 32-bit */
 
 /* operations for longs and pointers */
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index b5c85f18faee..4ebb4f8f4188 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -54,7 +54,8 @@ BEGIN_FW_FTR_SECTION;							\
 	/* from user - see if there are any DTL entries to process */	\
 	ld	r10,PACALPPACAPTR(r13);	/* get ptr to VPA */		\
 	ld	r11,PACA_DTL_RIDX(r13);	/* get log read index */	\
-	ld	r10,LPPACA_DTLIDX(r10);	/* get log write index */	\
+	addi	r10,r10,LPPACA_DTLIDX;					\
+	LDX_BE	r10,0,r10;		/* get log write index */	\
 	cmpd	cr1,r11,r10;						\
 	beq+	cr1,33f;						\
 	bl	.accumulate_stolen_time;				\
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index c1055a150b88..707fbfde1324 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -102,7 +102,8 @@ BEGIN_FW_FTR_SECTION
 	/* if from user, see if there are any DTL entries to process */
 	ld	r10,PACALPPACAPTR(r13)	/* get ptr to VPA */
 	ld	r11,PACA_DTL_RIDX(r13)	/* get log read index */
-	ld	r10,LPPACA_DTLIDX(r10)	/* get log write index */
+	addi	r10,r10,LPPACA_DTLIDX
+	LDX_BE	r10,0,r10		/* get log write index */
 	cmpd	cr1,r11,r10
 	beq+	cr1,33f
 	bl	.accumulate_stolen_time
@@ -531,9 +532,11 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_1T_SEGMENT)
 	 */
 	ld	r9,PACA_SLBSHADOWPTR(r13)
 	li	r12,0
-	std	r12,SLBSHADOW_STACKESID(r9) /* Clear ESID */
-	std	r7,SLBSHADOW_STACKVSID(r9)  /* Save VSID */
-	std	r0,SLBSHADOW_STACKESID(r9)  /* Save ESID */
+	std	r12,SLBSHADOW_STACKESID(r9)	/* Clear ESID */
+	li	r12,SLBSHADOW_STACKVSID
+	STDX_BE	r7,r12,r9			/* Save VSID */
+	li	r12,SLBSHADOW_STACKESID
+	STDX_BE	r0,r12,r9			/* Save ESID */
 
 	/* No need to check for MMU_FTR_NO_SLBIE_B here, since when
 	 * we have 1TB segments, the only CPUs known to have the errata
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index e6024c2ed5c7..0204089ebdd4 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -387,8 +387,8 @@ static void pseries_cmo_data(struct seq_file *m)
 		return;
 
 	for_each_possible_cpu(cpu) {
-		cmo_faults += lppaca_of(cpu).cmo_faults;
-		cmo_fault_time += lppaca_of(cpu).cmo_fault_time;
+		cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults);
+		cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time);
 	}
 
 	seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
@@ -406,8 +406,9 @@ static void splpar_dispatch_data(struct seq_file *m)
 	unsigned long dispatch_dispersions = 0;
 
 	for_each_possible_cpu(cpu) {
-		dispatches += lppaca_of(cpu).yield_count;
-		dispatch_dispersions += lppaca_of(cpu).dispersion_count;
+		dispatches += be32_to_cpu(lppaca_of(cpu).yield_count);
+		dispatch_dispersions +=
+			be32_to_cpu(lppaca_of(cpu).dispersion_count);
 	}
 
 	seq_printf(m, "dispatches=%lu\n", dispatches);
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index f8f24685f10a..3fc16e3beb9f 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -34,10 +34,10 @@ extern unsigned long __toc_start;
  */
 struct lppaca lppaca[] = {
 	[0 ... (NR_LPPACAS-1)] = {
-		.desc = 0xd397d781,	/* "LpPa" */
-		.size = sizeof(struct lppaca),
+		.desc = cpu_to_be32(0xd397d781),	/* "LpPa" */
+		.size = cpu_to_be16(sizeof(struct lppaca)),
 		.fpregs_in_use = 1,
-		.slb_count = 64,
+		.slb_count = cpu_to_be16(64),
 		.vmxregs_in_use = 0,
 		.page_ins = 0,
 	},
@@ -101,8 +101,8 @@ static inline void free_lppacas(void) { }
  */
 struct slb_shadow slb_shadow[] __cacheline_aligned = {
 	[0 ... (NR_CPUS-1)] = {
-		.persistent = SLB_NUM_BOLTED,
-		.buffer_length = sizeof(struct slb_shadow),
+		.persistent = cpu_to_be32(SLB_NUM_BOLTED),
+		.buffer_length = cpu_to_be32(sizeof(struct slb_shadow)),
 	},
 };
 
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index c863aa1f524a..b2bcd34f72d2 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -210,18 +210,18 @@ static u64 scan_dispatch_log(u64 stop_tb)
 	if (!dtl)
 		return 0;
 
-	if (i == vpa->dtl_idx)
+	if (i == be64_to_cpu(vpa->dtl_idx))
 		return 0;
-	while (i < vpa->dtl_idx) {
+	while (i < be64_to_cpu(vpa->dtl_idx)) {
 		if (dtl_consumer)
 			dtl_consumer(dtl, i);
-		dtb = dtl->timebase;
-		tb_delta = dtl->enqueue_to_dispatch_time +
-			dtl->ready_to_enqueue_time;
+		dtb = be64_to_cpu(dtl->timebase);
+		tb_delta = be32_to_cpu(dtl->enqueue_to_dispatch_time) +
+			be32_to_cpu(dtl->ready_to_enqueue_time);
 		barrier();
-		if (i + N_DISPATCH_LOG < vpa->dtl_idx) {
+		if (i + N_DISPATCH_LOG < be64_to_cpu(vpa->dtl_idx)) {
 			/* buffer has overflowed */
-			i = vpa->dtl_idx - N_DISPATCH_LOG;
+			i = be64_to_cpu(vpa->dtl_idx) - N_DISPATCH_LOG;
 			dtl = local_paca->dispatch_log + (i % N_DISPATCH_LOG);
 			continue;
 		}
@@ -269,7 +269,7 @@ static inline u64 calculate_stolen_time(u64 stop_tb)
 {
 	u64 stolen = 0;
 
-	if (get_paca()->dtl_ridx != get_paca()->lppaca_ptr->dtl_idx) {
+	if (get_paca()->dtl_ridx != be64_to_cpu(get_lppaca()->dtl_idx)) {
 		stolen = scan_dispatch_log(stop_tb);
 		get_paca()->system_time -= stolen;
 	}
diff --git a/arch/powerpc/kvm/book3s_64_slb.S b/arch/powerpc/kvm/book3s_64_slb.S
index 4f0caecc0f9d..4f12e8f0c718 100644
--- a/arch/powerpc/kvm/book3s_64_slb.S
+++ b/arch/powerpc/kvm/book3s_64_slb.S
@@ -17,6 +17,10 @@
  * Authors: Alexander Graf <agraf@suse.de>
  */
 
+#ifdef __LITTLE_ENDIAN__
+#error Need to fix SLB shadow accesses in little endian mode
+#endif
+
 #define SHADOW_SLB_ESID(num)	(SLBSHADOW_SAVEAREA + (num * 0x10))
 #define SHADOW_SLB_VSID(num)	(SLBSHADOW_SAVEAREA + (num * 0x10) + 0x8)
 #define UNBOLT_SLB_ENTRY(num) \
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index b02f91e4c70d..20e7fcdc4c95 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -29,6 +29,10 @@
 #include <asm/kvm_book3s_asm.h>
 #include <asm/mmu-hash64.h>
 
+#ifdef __LITTLE_ENDIAN__
+#error Need to fix lppaca and SLB shadow accesses in little endian mode
+#endif
+
 /*****************************************************************************
  *                                                                           *
  *        Real Mode handlers that need to be in the linear mapping           *
diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c
index bb7cfecf2788..0c9c8d7d0734 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -32,7 +32,7 @@ void __spin_yield(arch_spinlock_t *lock)
 		return;
 	holder_cpu = lock_value & 0xffff;
 	BUG_ON(holder_cpu >= NR_CPUS);
-	yield_count = lppaca_of(holder_cpu).yield_count;
+	yield_count = be32_to_cpu(lppaca_of(holder_cpu).yield_count);
 	if ((yield_count & 1) == 0)
 		return;		/* virtual cpu is currently running */
 	rmb();
@@ -57,7 +57,7 @@ void __rw_yield(arch_rwlock_t *rw)
 		return;		/* no write lock at present */
 	holder_cpu = lock_value & 0xffff;
 	BUG_ON(holder_cpu >= NR_CPUS);
-	yield_count = lppaca_of(holder_cpu).yield_count;
+	yield_count = be32_to_cpu(lppaca_of(holder_cpu).yield_count);
 	if ((yield_count & 1) == 0)
 		return;		/* virtual cpu is currently running */
 	rmb();
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 8726779e1409..76d8e7cc7805 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -443,8 +443,12 @@ good_area:
 				      regs, address);
 #ifdef CONFIG_PPC_SMLPAR
 			if (firmware_has_feature(FW_FEATURE_CMO)) {
+				u32 page_ins;
+
 				preempt_disable();
-				get_lppaca()->page_ins += (1 << PAGE_FACTOR);
+				page_ins = be32_to_cpu(get_lppaca()->page_ins);
+				page_ins += 1 << PAGE_FACTOR;
+				get_lppaca()->page_ins = cpu_to_be32(page_ins);
 				preempt_enable();
 			}
 #endif /* CONFIG_PPC_SMLPAR */
diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c
index a538c80db2df..9d1d33cd2be5 100644
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -66,8 +66,10 @@ static inline void slb_shadow_update(unsigned long ea, int ssize,
 	 * we only update the current CPU's SLB shadow buffer.
 	 */
 	get_slb_shadow()->save_area[entry].esid = 0;
-	get_slb_shadow()->save_area[entry].vsid = mk_vsid_data(ea, ssize, flags);
-	get_slb_shadow()->save_area[entry].esid = mk_esid_data(ea, ssize, entry);
+	get_slb_shadow()->save_area[entry].vsid =
+				cpu_to_be64(mk_vsid_data(ea, ssize, flags));
+	get_slb_shadow()->save_area[entry].esid =
+				cpu_to_be64(mk_esid_data(ea, ssize, entry));
 }
 
 static inline void slb_shadow_clear(unsigned long entry)
@@ -112,7 +114,8 @@ static void __slb_flush_and_rebolt(void)
 	} else {
 		/* Update stack entry; others don't change */
 		slb_shadow_update(get_paca()->kstack, mmu_kernel_ssize, lflags, 2);
-		ksp_vsid_data = get_slb_shadow()->save_area[2].vsid;
+		ksp_vsid_data =
+			be64_to_cpu(get_slb_shadow()->save_area[2].vsid);
 	}
 
 	/* We need to do this all in asm, so we're sure we don't touch
diff --git a/arch/powerpc/platforms/pseries/dtl.c b/arch/powerpc/platforms/pseries/dtl.c
index 0cc0ac07a55d..238240e02ef8 100644
--- a/arch/powerpc/platforms/pseries/dtl.c
+++ b/arch/powerpc/platforms/pseries/dtl.c
@@ -87,7 +87,7 @@ static void consume_dtle(struct dtl_entry *dtle, u64 index)
 	barrier();
 
 	/* check for hypervisor ring buffer overflow, ignore this entry if so */
-	if (index + N_DISPATCH_LOG < vpa->dtl_idx)
+	if (index + N_DISPATCH_LOG < be64_to_cpu(vpa->dtl_idx))
 		return;
 
 	++wp;
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 60b6f4e8d63d..0b7c86e3d75d 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -106,7 +106,7 @@ void vpa_init(int cpu)
 		lppaca_of(cpu).dtl_idx = 0;
 
 		/* hypervisor reads buffer length from this field */
-		dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES;
+		dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES);
 		ret = register_dtl(hwcpu, __pa(dtl));
 		if (ret)
 			pr_err("WARNING: DTL registration of cpu %d (hw %d) "
diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c
index 92db881be27e..14899b1db1e9 100644
--- a/arch/powerpc/platforms/pseries/processor_idle.c
+++ b/arch/powerpc/platforms/pseries/processor_idle.c
@@ -45,7 +45,11 @@ static inline void idle_loop_prolog(unsigned long *in_purr)
 
 static inline void idle_loop_epilog(unsigned long in_purr)
 {
-	get_lppaca()->wait_state_cycles += mfspr(SPRN_PURR) - in_purr;
+	u64 wait_cycles;
+
+	wait_cycles = be64_to_cpu(get_lppaca()->wait_state_cycles);
+	wait_cycles += mfspr(SPRN_PURR) - in_purr;
+	get_lppaca()->wait_state_cycles = cpu_to_be64(wait_cycles);
 	get_lppaca()->idle = 0;
 }
 
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index b19cd8334630..33d619665cb7 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -323,7 +323,7 @@ static int alloc_dispatch_logs(void)
 	get_paca()->lppaca_ptr->dtl_idx = 0;
 
 	/* hypervisor reads buffer length from this field */
-	dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES;
+	dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES);
 	ret = register_dtl(hard_smp_processor_id(), __pa(dtl));
 	if (ret)
 		pr_err("WARNING: DTL registration of cpu %d (hw %d) failed "
-- 
cgit v1.2.3


From 4288e343fb63cd74b35bf68c5d83551f867dba56 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:47 +1000
Subject: powerpc: Emulate instructions in little endian mode

Alistair noticed we got a SIGILL on userspace mfpvr instructions.

Remove the little endian check in the emulation code, it is
probably there to protect against the old pseudo little endian
implementations but doesn't make sense for real little endian.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/traps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index e6fac2102b06..bdf2dd141598 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -967,7 +967,7 @@ static int emulate_instruction(struct pt_regs *regs)
 	u32 instword;
 	u32 rd;
 
-	if (!user_mode(regs) || (regs->msr & MSR_LE))
+	if (!user_mode(regs))
 		return -EINVAL;
 	CHECK_FULL_REGS(regs);
 
-- 
cgit v1.2.3


From 0654de1cd744a86e19e0a5afb75e3c23571093e6 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 7 Aug 2013 02:01:48 +1000
Subject: powerpc: Little endian SMP IPI demux

Add little endian support for demuxing SMP IPIs

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/smp.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index d9d8bb0f4454..442d8e23f8f4 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -232,6 +232,12 @@ void smp_muxed_ipi_message_pass(int cpu, int msg)
 	smp_ops->cause_ipi(cpu, info->data);
 }
 
+#ifdef __BIG_ENDIAN__
+#define IPI_MESSAGE(A) (1 << (24 - 8 * (A)))
+#else
+#define IPI_MESSAGE(A) (1 << (8 * (A)))
+#endif
+
 irqreturn_t smp_ipi_demux(void)
 {
 	struct cpu_messages *info = &__get_cpu_var(ipi_message);
@@ -241,19 +247,14 @@ irqreturn_t smp_ipi_demux(void)
 
 	do {
 		all = xchg(&info->messages, 0);
-
-#ifdef __BIG_ENDIAN
-		if (all & (1 << (24 - 8 * PPC_MSG_CALL_FUNCTION)))
+		if (all & IPI_MESSAGE(PPC_MSG_CALL_FUNCTION))
 			generic_smp_call_function_interrupt();
-		if (all & (1 << (24 - 8 * PPC_MSG_RESCHEDULE)))
+		if (all & IPI_MESSAGE(PPC_MSG_RESCHEDULE))
 			scheduler_ipi();
-		if (all & (1 << (24 - 8 * PPC_MSG_CALL_FUNC_SINGLE)))
+		if (all & IPI_MESSAGE(PPC_MSG_CALL_FUNC_SINGLE))
 			generic_smp_call_function_single_interrupt();
-		if (all & (1 << (24 - 8 * PPC_MSG_DEBUGGER_BREAK)))
+		if (all & IPI_MESSAGE(PPC_MSG_DEBUGGER_BREAK))
 			debug_ipi_action(0, NULL);
-#else
-#error Unsupported ENDIAN
-#endif
 	} while (info->messages);
 
 	return IRQ_HANDLED;
-- 
cgit v1.2.3


From afbcdd97bf117bc2d01b865a32f78f662437a4d8 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Fri, 16 Aug 2013 10:13:06 +1000
Subject: powerpc/wsp: Fix early debug build

When reworking udbg_16550.c I forgot to remove the old and now useless
code for the CONFIG_PPC_EARLY_DEBUG_WSP case, which doesn't build as
a result. I also missed a cast.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/udbg_16550.c | 38 +-------------------------------------
 1 file changed, 1 insertion(+), 37 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c
index 25c58e81a009..75702e207b29 100644
--- a/arch/powerpc/kernel/udbg_16550.c
+++ b/arch/powerpc/kernel/udbg_16550.c
@@ -300,45 +300,9 @@ void __init udbg_init_40x_realmode(void)
 
 #ifdef CONFIG_PPC_EARLY_DEBUG_WSP
 
-static void udbg_wsp_flush(void)
-{
-	if (udbg_comport) {
-		while ((readb(&udbg_comport->lsr) & LSR_THRE) == 0)
-			/* wait for idle */;
-	}
-}
-
-static void udbg_wsp_putc(char c)
-{
-	if (udbg_comport) {
-		if (c == '\n')
-			udbg_wsp_putc('\r');
-		udbg_wsp_flush();
-		writeb(c, &udbg_comport->thr); eieio();
-	}
-}
-
-static int udbg_wsp_getc(void)
-{
-	if (udbg_comport) {
-		while ((readb(&udbg_comport->lsr) & LSR_DR) == 0)
-			; /* wait for char */
-		return readb(&udbg_comport->rbr);
-	}
-	return -1;
-}
-
-static int udbg_wsp_getc_poll(void)
-{
-	if (udbg_comport)
-		if (readb(&udbg_comport->lsr) & LSR_DR)
-			return readb(&udbg_comport->rbr);
-	return -1;
-}
-
 void __init udbg_init_wsp(void)
 {
-	udbg_uart_init_mmio(WSP_UART_VIRT, 1);
+	udbg_uart_init_mmio((void *)WSP_UART_VIRT, 1);
 	udbg_uart_setup(57600, 50000000);
 }
 
-- 
cgit v1.2.3


From beb2dc0a7a84be003ce54e98b95d65cc66e6e536 Mon Sep 17 00:00:00 2001
From: Scott Wood <scottwood@freescale.com>
Date: Tue, 20 Aug 2013 19:33:12 -0500
Subject: powerpc: Convert some mftb/mftbu into mfspr

Some CPUs (such as e500v1/v2) don't implement mftb and will take a
trap.  mfspr should work on everything that has a timebase, and is the
preferred instruction according to ISA v2.06.

Currently we get away with mftb on 85xx because the assembler converts
it to mfspr due to -Wa,-me500.  However, that flag has other effects
that are undesireable for certain targets (e.g.  lwsync is converted to
sync), and is hostile to multiplatform kernels.  Thus we would like to
stop setting it for all e500-family builds.

mftb/mftbu instances which are in 85xx code or common code are
converted.  Instances which will never run on 85xx are left alone.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/boot/ppc_asm.h               |  3 +++
 arch/powerpc/boot/util.S                  | 10 +++++-----
 arch/powerpc/include/asm/ppc_asm.h        |  4 ++--
 arch/powerpc/include/asm/reg.h            | 15 ++++++++++-----
 arch/powerpc/include/asm/timex.h          |  4 ++--
 arch/powerpc/kernel/vdso32/gettimeofday.S |  6 +++---
 arch/powerpc/platforms/85xx/smp.c         |  6 ++++--
 7 files changed, 29 insertions(+), 19 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/boot/ppc_asm.h b/arch/powerpc/boot/ppc_asm.h
index 1c2c2817f9b7..eb0e98be69e0 100644
--- a/arch/powerpc/boot/ppc_asm.h
+++ b/arch/powerpc/boot/ppc_asm.h
@@ -59,4 +59,7 @@
 #define	r30	30
 #define	r31	31
 
+#define SPRN_TBRL	268
+#define SPRN_TBRU	269
+
 #endif /* _PPC64_PPC_ASM_H */
diff --git a/arch/powerpc/boot/util.S b/arch/powerpc/boot/util.S
index 427ddfc11991..5143228e3e5f 100644
--- a/arch/powerpc/boot/util.S
+++ b/arch/powerpc/boot/util.S
@@ -71,18 +71,18 @@ udelay:
 	add	r4,r4,r5
 	addi	r4,r4,-1
 	divw	r4,r4,r5	/* BUS ticks */
-1:	mftbu	r5
-	mftb	r6
-	mftbu	r7
+1:	mfspr	r5, SPRN_TBRU
+	mfspr	r6, SPRN_TBRL
+	mfspr	r7, SPRN_TBRU
 	cmpw	0,r5,r7
 	bne	1b		/* Get [synced] base time */
 	addc	r9,r6,r4	/* Compute end time */
 	addze	r8,r5
-2:	mftbu	r5
+2:	mfspr	r5, SPRN_TBRU
 	cmpw	0,r5,r8
 	blt	2b
 	bgt	3f
-	mftb	r6
+	mfspr	r6, SPRN_TBRL
 	cmpw	0,r6,r9
 	blt	2b
 3:	blr
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index 8fdd3da134e0..599545738af3 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -433,13 +433,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_601)
 
 #if defined(CONFIG_PPC_CELL) || defined(CONFIG_PPC_FSL_BOOK3E)
 #define MFTB(dest)			\
-90:	mftb  dest;			\
+90:	mfspr dest, SPRN_TBRL;		\
 BEGIN_FTR_SECTION_NESTED(96);		\
 	cmpwi dest,0;			\
 	beq-  90b;			\
 END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96)
 #else
-#define MFTB(dest)			mftb dest
+#define MFTB(dest)			mfspr dest, SPRN_TBRL
 #endif
 
 #ifndef CONFIG_SMP
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 55b03079d197..64264bf601f5 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1120,7 +1120,7 @@
 #if defined(CONFIG_PPC_CELL) || defined(CONFIG_PPC_FSL_BOOK3E)
 #define mftb()		({unsigned long rval;				\
 			asm volatile(					\
-				"90:	mftb %0;\n"			\
+				"90:	mfspr %0, %2;\n"		\
 				"97:	cmpwi %0,0;\n"			\
 				"	beq- 90b;\n"			\
 				"99:\n"					\
@@ -1134,18 +1134,23 @@
 				"	.llong 0\n"			\
 				"	.llong 0\n"			\
 				".previous"				\
-			: "=r" (rval) : "i" (CPU_FTR_CELL_TB_BUG)); rval;})
+			: "=r" (rval) \
+			: "i" (CPU_FTR_CELL_TB_BUG), "i" (SPRN_TBRL)); \
+			rval;})
 #else
 #define mftb()		({unsigned long rval;	\
-			asm volatile("mftb %0" : "=r" (rval)); rval;})
+			asm volatile("mfspr %0, %1" : \
+				     "=r" (rval) : "i" (SPRN_TBRL)); rval;})
 #endif /* !CONFIG_PPC_CELL */
 
 #else /* __powerpc64__ */
 
 #define mftbl()		({unsigned long rval;	\
-			asm volatile("mftbl %0" : "=r" (rval)); rval;})
+			asm volatile("mfspr %0, %1" : "=r" (rval) : \
+				"i" (SPRN_TBRL)); rval;})
 #define mftbu()		({unsigned long rval;	\
-			asm volatile("mftbu %0" : "=r" (rval)); rval;})
+			asm volatile("mfspr %0, %1" : "=r" (rval) : \
+				"i" (SPRN_TBRU)); rval;})
 #endif /* !__powerpc64__ */
 
 #define mttbl(v)	asm volatile("mttbl %0":: "r"(v))
diff --git a/arch/powerpc/include/asm/timex.h b/arch/powerpc/include/asm/timex.h
index c55e14f7ef44..18908caa1f3b 100644
--- a/arch/powerpc/include/asm/timex.h
+++ b/arch/powerpc/include/asm/timex.h
@@ -29,7 +29,7 @@ static inline cycles_t get_cycles(void)
 	ret = 0;
 
 	__asm__ __volatile__(
-		"97:	mftb %0\n"
+		"97:	mfspr %0, %2\n"
 		"99:\n"
 		".section __ftr_fixup,\"a\"\n"
 		".align 2\n"
@@ -41,7 +41,7 @@ static inline cycles_t get_cycles(void)
 		"	.long 0\n"
 		"	.long 0\n"
 		".previous"
-		: "=r" (ret) : "i" (CPU_FTR_601));
+		: "=r" (ret) : "i" (CPU_FTR_601), "i" (SPRN_TBRL));
 	return ret;
 #endif
 }
diff --git a/arch/powerpc/kernel/vdso32/gettimeofday.S b/arch/powerpc/kernel/vdso32/gettimeofday.S
index 27e2f623210b..6b1f2a6d5517 100644
--- a/arch/powerpc/kernel/vdso32/gettimeofday.S
+++ b/arch/powerpc/kernel/vdso32/gettimeofday.S
@@ -232,9 +232,9 @@ __do_get_tspec:
 	lwz	r6,(CFG_TB_ORIG_STAMP+4)(r9)
 
 	/* Get a stable TB value */
-2:	mftbu	r3
-	mftbl	r4
-	mftbu	r0
+2:	mfspr	r3, SPRN_TBRU
+	mfspr	r4, SPRN_TBRL
+	mfspr	r0, SPRN_TBRU
 	cmplw	cr0,r3,r0
 	bne-	2b
 
diff --git a/arch/powerpc/platforms/85xx/smp.c b/arch/powerpc/platforms/85xx/smp.c
index ea7e62910891..281b7f01df63 100644
--- a/arch/powerpc/platforms/85xx/smp.c
+++ b/arch/powerpc/platforms/85xx/smp.c
@@ -83,11 +83,13 @@ static void mpc85xx_give_timebase(void)
 	{
 		u64 prev;
 
-		asm volatile("mftb %0" : "=r" (timebase));
+		asm volatile("mfspr %0, %1" : "=r" (timebase) :
+			     "i" (SPRN_TBRL));
 
 		do {
 			prev = timebase;
-			asm volatile("mftb %0" : "=r" (timebase));
+			asm volatile("mfspr %0, %1" : "=r" (timebase) :
+				     "i" (SPRN_TBRL));
 		} while (prev != timebase);
 	}
 #else
-- 
cgit v1.2.3


From 5a31057fc06c3ffa2df7f44c4e4884f3330707ff Mon Sep 17 00:00:00 2001
From: Wang Dongsheng <dongsheng.wang@freescale.com>
Date: Thu, 8 Aug 2013 10:06:45 +0800
Subject: powerpc: add Book E support to 64-bit hibernation

Update the 64-bit hibernation code to support Book E CPUs.
Some registers and instructions are not defined for Book3e
(SDR reg, tlbia instruction).

SDR: Storage Description Register. Book3S and Book3E have different
address translation mode, we do not need HTABORG & HTABSIZE to
translate virtual address to real address.

More registers are saved in BookE-64bit.(TCR, SPRG1)

Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/powerpc/kernel/swsusp_asm64.S | 45 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 43 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/swsusp_asm64.S b/arch/powerpc/kernel/swsusp_asm64.S
index 86ac1d90d02b..22045984835f 100644
--- a/arch/powerpc/kernel/swsusp_asm64.S
+++ b/arch/powerpc/kernel/swsusp_asm64.S
@@ -46,10 +46,19 @@
 #define SL_r29		0xe8
 #define SL_r30		0xf0
 #define SL_r31		0xf8
-#define SL_SIZE		SL_r31+8
+#define SL_SPRG1	0x100
+#define SL_TCR		0x108
+#define SL_SIZE		SL_TCR+8
 
 /* these macros rely on the save area being
  * pointed to by r11 */
+
+#define SAVE_SPR(register)		\
+	mfspr	r0, SPRN_##register	;\
+	std	r0, SL_##register(r11)
+#define RESTORE_SPR(register)		\
+	ld	r0, SL_##register(r11)	;\
+	mtspr	SPRN_##register, r0
 #define SAVE_SPECIAL(special)		\
 	mf##special	r0		;\
 	std	r0, SL_##special(r11)
@@ -103,8 +112,15 @@ _GLOBAL(swsusp_arch_suspend)
 	SAVE_REGISTER(r30)
 	SAVE_REGISTER(r31)
 	SAVE_SPECIAL(MSR)
-	SAVE_SPECIAL(SDR1)
 	SAVE_SPECIAL(XER)
+#ifdef CONFIG_PPC_BOOK3S_64
+	SAVE_SPECIAL(SDR1)
+#else
+	SAVE_SPR(TCR)
+
+	/* Save SPRG1, SPRG1 be used save paca */
+	SAVE_SPR(SPRG1)
+#endif
 
 	/* we push the stack up 128 bytes but don't store the
 	 * stack pointer on the stack like a real stackframe */
@@ -151,6 +167,7 @@ copy_page_loop:
 	bne+	copyloop
 nothing_to_copy:
 
+#ifdef CONFIG_PPC_BOOK3S_64
 	/* flush caches */
 	lis	r3, 0x10
 	mtctr	r3
@@ -167,6 +184,7 @@ nothing_to_copy:
 	sync
 
 	tlbia
+#endif
 
 	ld	r11,swsusp_save_area_ptr@toc(r2)
 
@@ -208,16 +226,39 @@ nothing_to_copy:
 	RESTORE_REGISTER(r29)
 	RESTORE_REGISTER(r30)
 	RESTORE_REGISTER(r31)
+
+#ifdef CONFIG_PPC_BOOK3S_64
 	/* can't use RESTORE_SPECIAL(MSR) */
 	ld	r0, SL_MSR(r11)
 	mtmsrd	r0, 0
 	RESTORE_SPECIAL(SDR1)
+#else
+	/* Restore SPRG1, be used to save paca */
+	ld	r0, SL_SPRG1(r11)
+	mtsprg	1, r0
+
+	RESTORE_SPECIAL(MSR)
+
+	/* Restore TCR and clear any pending bits in TSR. */
+	RESTORE_SPR(TCR)
+	lis	r0, (TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS)@h
+	mtspr	SPRN_TSR, r0
+
+	/* Kick decrementer */
+	li	r0, 1
+	mtdec	r0
+
+	/* Invalidate all tlbs */
+	bl	_tlbil_all
+#endif
 	RESTORE_SPECIAL(XER)
 
 	sync
 
 	addi	r1,r1,-128
+#ifdef CONFIG_PPC_BOOK3S_64
 	bl	slb_flush_and_rebolt
+#endif
 	bl	do_after_copyback
 	addi	r1,r1,128
 
-- 
cgit v1.2.3


From 5c2e08231b68a3c8082716a7ed4e972dde406e4a Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Tue, 20 Aug 2013 20:30:07 +1000
Subject: powerpc: Never handle VSX alignment exceptions from kernel

The VSX alignment handler needs to write out the existing VSX
state to memory before operating on it (flush_vsx_to_thread()).
If we take a VSX alignment exception in the kernel bad things
will happen. It looks like we could write the kernel state out
to the user process, or we could handle the kernel exception
using data from the user process (depending if MSR_VSX is set
or not).

Worse still, if the code to read or write the VSX state causes an
alignment exception, we will recurse forever. I ended up with
hundreds of megabytes of kernel stack to look through as a result.

Floating point and SPE code have similar issues but already include
a user check. Add the same check to emulate_vsx().

With this patch any unaligned VSX loads and stores in the kernel
will show up as a clear oops rather than silent corruption of
kernel or userspace VSX state, or worse, corruption of a potentially
unlimited amount of kernel memory.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/align.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 52e5758ea368..a27ccd5dc6b9 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -651,6 +651,10 @@ static int emulate_vsx(unsigned char __user *addr, unsigned int reg,
 	int sw = 0;
 	int i, j;
 
+	/* userland only */
+	if (unlikely(!user_mode(regs)))
+		return 0;
+
 	flush_vsx_to_thread(current);
 
 	if (reg < 32)
-- 
cgit v1.2.3


From fa111f1f764783fd5f1f12f5dd5d5f66d3160b48 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Thu, 15 Aug 2013 15:22:17 +1000
Subject: powerpc: Fix location and rename exception trampolines

The symbols that name some of our exception trampolines are ahead of the
location they name. In most cases this is OK because the code is tightly
packed, but in some cases it means the symbol floats ahead of the
correct location, eg:

  c000000000000ea0 <performance_monitor_pSeries_1>:
          ...
  c000000000000f00:       7d b2 43 a6     mtsprg  2,r13

Fix them all by moving the symbol after the set of the location.

While we're moving them anyway, rename them to loose the camelcase and
to make it clear that they are trampolines.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/exceptions-64s.S | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 2e00b268cfb7..aa73bf940849 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -323,32 +323,32 @@ hv_exception_trampoline:
 	 * prolog code of the PerformanceMonitor one. A little
 	 * trickery is thus necessary
 	 */
-performance_monitor_pSeries_1:
 	. = 0xf00
+performance_monitor_pseries_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	performance_monitor_pSeries
 
-altivec_unavailable_pSeries_1:
 	. = 0xf20
+altivec_unavailable_pseries_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	altivec_unavailable_pSeries
 
-vsx_unavailable_pSeries_1:
 	. = 0xf40
+vsx_unavailable_pseries_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	vsx_unavailable_pSeries
 
-facility_unavailable_trampoline:
 	. = 0xf60
+facility_unavailable_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	facility_unavailable_pSeries
 
-hv_facility_unavailable_trampoline:
 	. = 0xf80
+hv_facility_unavailable_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	facility_unavailable_hv
@@ -821,32 +821,32 @@ system_call_relon_pSeries:
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	h_doorbell_relon_hv
 
-performance_monitor_relon_pSeries_1:
 	. = 0x4f00
+performance_monitor_relon_pseries_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	performance_monitor_relon_pSeries
 
-altivec_unavailable_relon_pSeries_1:
 	. = 0x4f20
+altivec_unavailable_relon_pseries_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	altivec_unavailable_relon_pSeries
 
-vsx_unavailable_relon_pSeries_1:
 	. = 0x4f40
+vsx_unavailable_relon_pseries_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	vsx_unavailable_relon_pSeries
 
-facility_unavailable_relon_trampoline:
 	. = 0x4f60
+facility_unavailable_relon_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	facility_unavailable_relon_pSeries
 
-hv_facility_unavailable_relon_trampoline:
 	. = 0x4f80
+hv_facility_unavailable_relon_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	facility_unavailable_relon_hv
-- 
cgit v1.2.3


From d671ddd6654daf93c56f6ddff827bed448e1a312 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Thu, 15 Aug 2013 15:22:18 +1000
Subject: powerpc: Add more exception trampolines for hypervisor exceptions

This makes back traces and profiles easier to read.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/exceptions-64s.S | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index aa73bf940849..17f761dccb7a 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -293,27 +293,31 @@ system_call_pSeries:
 	 * out of line to handle them
 	 */
 	. = 0xe00
-hv_exception_trampoline:
+hv_data_storage_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	h_data_storage_hv
 
 	. = 0xe20
+hv_instr_storage_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	h_instr_storage_hv
 
 	. = 0xe40
+emulation_assist_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	emulation_assist_hv
 
 	. = 0xe60
+hv_exception_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	hmi_exception_hv
 
 	. = 0xe80
+hv_doorbell_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	h_doorbell_hv
@@ -809,6 +813,7 @@ system_call_relon_pSeries:
 	b	.	/* Can't happen, see v2.07 Book III-S section 6.5 */
 
 	. = 0x4e40
+emulation_assist_relon_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	emulation_assist_relon_hv
@@ -817,6 +822,7 @@ system_call_relon_pSeries:
 	b	.	/* Can't happen, see v2.07 Book III-S section 6.5 */
 
 	. = 0x4e80
+h_doorbell_relon_trampoline:
 	SET_SCRATCH0(r13)
 	EXCEPTION_PROLOG_0(PACA_EXGEN)
 	b	h_doorbell_relon_hv
-- 
cgit v1.2.3


From b3f6a45925232d29519007f1ba6687e1e790fb5d Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Thu, 15 Aug 2013 15:22:19 +1000
Subject: powerpc: Skip emulating & leave interrupts off for kernel program
 checks

In the program check handler we handle some causes with interrupts off
and others with interrupts on.

We need to enable interrupts to handle the emulation cases, because they
access userspace memory and might sleep.

For faults in the kernel we don't want to do any emulation, and
emulate_instruction() enforces that. do_mathemu() doesn't but probably
should.

The other disadvantage of enabling interrupts for kernel faults is that
we may take another interrupt, and recurse. As seen below:

  --- Exception: e40 at c000000000004ee0 performance_monitor_relon_pSeries_1
  [link register   ] c00000000000f858 .arch_local_irq_restore+0x38/0x90
  [c000000fb185dc10] 0000000000000000 (unreliable)
  [c000000fb185dc80] c0000000007d8558 .program_check_exception+0x298/0x2d0
  [c000000fb185dd00] c000000000002f40 emulation_assist_common+0x140/0x180
  --- Exception: e40 at c000000000004ee0 performance_monitor_relon_pSeries_1
  [link register   ] c00000000000f858 .arch_local_irq_restore+0x38/0x90
  [c000000fb185dff0] 00000000008b9190 (unreliable)
  [c000000fb185e060] c0000000007d8558 .program_check_exception+0x298/0x2d0

So avoid both problems by checking if the fault was in the kernel and
skipping the enable of interrupts and the emulation. Go straight to
delivering the SIGILL, which for kernel faults calls die() and so on,
dropping us in the debugger etc.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/traps.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index bdf2dd141598..77a7581dcb1c 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1151,6 +1151,16 @@ void __kprobes program_check_exception(struct pt_regs *regs)
 	}
 #endif
 
+	/*
+	 * If we took the program check in the kernel skip down to sending a
+	 * SIGILL. The subsequent cases all relate to emulating instructions
+	 * which we should only do for userspace. We also do not want to enable
+	 * interrupts for kernel faults because that might lead to further
+	 * faults, and loose the context of the original exception.
+	 */
+	if (!user_mode(regs))
+		goto sigill;
+
 	/* We restore the interrupt state now */
 	if (!arch_irq_disabled_regs(regs))
 		local_irq_enable();
@@ -1179,6 +1189,7 @@ void __kprobes program_check_exception(struct pt_regs *regs)
 		}
 	}
 
+sigill:
 	if (reason & REASON_PRIVILEGED)
 		_exception(SIGILL, regs, ILL_PRVOPC, regs->nip);
 	else
-- 
cgit v1.2.3


From bc683a7e51c5c838bc74316125bebec92af74f12 Mon Sep 17 00:00:00 2001
From: Michael Neuling <mikey@neuling.org>
Date: Mon, 26 Aug 2013 13:55:57 +1000
Subject: powerpc: Cleanup handling of the DSCR bit in the FSCR register

As suggested by paulus we can simplify the Data Stream Control Register
(DSCR) Facility Status and Control Register (FSCR) handling.

Firstly, we simplify the asm by using a rldimi.

Secondly, we now use the FSCR only to control the DSCR facility, rather
than both the FSCR and HFSCR.  Users will see no functional change from
this but will get a minor speedup as they will trap into the kernel only
once (rather than twice) when they first touch the DSCR.  Also, this
changes removes a bunch of ugly FTR_SECTION code.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/entry_64.S | 31 ++++++-------------------------
 arch/powerpc/kernel/traps.c    |  7 ++-----
 2 files changed, 8 insertions(+), 30 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 4524500f30d6..c04cdf70d487 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -578,34 +578,15 @@ BEGIN_FTR_SECTION
 	ld	r7,DSCR_DEFAULT@toc(2)
 	ld	r0,THREAD_DSCR(r4)
 	cmpwi	r6,0
-	li	r8, FSCR_DSCR
 	bne	1f
 	ld	r0,0(r7)
-	b	3f
 1:
-  BEGIN_FTR_SECTION_NESTED(70)
-	mfspr	r6, SPRN_FSCR
-	or	r6, r6, r8
-	mtspr	SPRN_FSCR, r6
-    BEGIN_FTR_SECTION_NESTED(69)
-	mfspr	r6, SPRN_HFSCR
-	or	r6, r6, r8
-	mtspr	SPRN_HFSCR, r6
-    END_FTR_SECTION_NESTED(CPU_FTR_HVMODE, CPU_FTR_HVMODE, 69)
-	b	4f
-  END_FTR_SECTION_NESTED(CPU_FTR_ARCH_207S, CPU_FTR_ARCH_207S, 70)
-3:
-  BEGIN_FTR_SECTION_NESTED(70)
-	mfspr	r6, SPRN_FSCR
-	andc	r6, r6, r8
-	mtspr	SPRN_FSCR, r6
-    BEGIN_FTR_SECTION_NESTED(69)
-	mfspr	r6, SPRN_HFSCR
-	andc	r6, r6, r8
-	mtspr	SPRN_HFSCR, r6
-    END_FTR_SECTION_NESTED(CPU_FTR_HVMODE, CPU_FTR_HVMODE, 69)
-  END_FTR_SECTION_NESTED(CPU_FTR_ARCH_207S, CPU_FTR_ARCH_207S, 70)
-4:	cmpd	r0,r25
+BEGIN_FTR_SECTION_NESTED(70)
+	mfspr	r8, SPRN_FSCR
+	rldimi	r8, r6, FSCR_DSCR_LG, (63 - FSCR_DSCR_LG)
+	mtspr	SPRN_FSCR, r8
+END_FTR_SECTION_NESTED(CPU_FTR_ARCH_207S, CPU_FTR_ARCH_207S, 70)
+	cmpd	r0,r25
 	beq	2f
 	mtspr	SPRN_DSCR,r0
 2:
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 529a9329e8d9..f783c932faeb 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1342,13 +1342,10 @@ void facility_unavailable_exception(struct pt_regs *regs)
 	if (status == FSCR_DSCR_LG) {
 		/* User is acessing the DSCR.  Set the inherit bit and allow
 		 * the user to set it directly in future by setting via the
-		 * H/FSCR DSCR bit.
+		 * FSCR DSCR bit.  We always leave HFSCR DSCR set.
 		 */
 		current->thread.dscr_inherit = 1;
-		if (hv)
-			mtspr(SPRN_HFSCR, value | HFSCR_DSCR);
-		else
-			mtspr(SPRN_FSCR,  value | FSCR_DSCR);
+		mtspr(SPRN_FSCR, value | FSCR_DSCR);
 		return;
 	}
 
-- 
cgit v1.2.3


From ee372bc1c6ab2f411d098337936ebb994af264c4 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Tue, 27 Aug 2013 16:01:23 +1000
Subject: powerpc/btext: Fix CONFIG_PPC_EARLY_DEBUG_BOOTX on ppc32

The "rmci" stuff only exists on 64-bit

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/btext.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/btext.c b/arch/powerpc/kernel/btext.c
index 0428992fdb4b..41c011cb6070 100644
--- a/arch/powerpc/kernel/btext.c
+++ b/arch/powerpc/kernel/btext.c
@@ -52,7 +52,7 @@ extern void rmci_off(void);
 
 static inline void rmci_maybe_on(void)
 {
-#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
+#if defined(CONFIG_PPC_EARLY_DEBUG_BOOTX) && defined(CONFIG_PPC64)
 	if (!(mfmsr() & MSR_DR))
 		rmci_on();
 #endif
@@ -60,7 +60,7 @@ static inline void rmci_maybe_on(void)
 
 static inline void rmci_maybe_off(void)
 {
-#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
+#if defined(CONFIG_PPC_EARLY_DEBUG_BOOTX) && defined(CONFIG_PPC64)
 	if (!(mfmsr() & MSR_DR))
 		rmci_off();
 #endif
-- 
cgit v1.2.3


From 83c93e2bdfe33694032cc6d74e956755dd62e551 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Wed, 28 Aug 2013 11:20:54 +1000
Subject: powerpc/pseries: Move lparcfg.c to platforms/pseries

This file is entirely pseries specific nowadays, so move it out
of arch/powerpc/kernel where it doesn't belong anymore.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/Makefile             |   1 -
 arch/powerpc/kernel/lparcfg.c            | 710 -------------------------------
 arch/powerpc/platforms/pseries/Makefile  |   1 +
 arch/powerpc/platforms/pseries/lparcfg.c | 710 +++++++++++++++++++++++++++++++
 4 files changed, 711 insertions(+), 711 deletions(-)
 delete mode 100644 arch/powerpc/kernel/lparcfg.c
 create mode 100644 arch/powerpc/platforms/pseries/lparcfg.c

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 5b280f59b5ca..445cb6e39d5b 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -55,7 +55,6 @@ obj-$(CONFIG_PPC_RTAS)		+= rtas.o rtas-rtc.o $(rtaspci-y-y)
 obj-$(CONFIG_PPC_RTAS_DAEMON)	+= rtasd.o
 obj-$(CONFIG_RTAS_FLASH)	+= rtas_flash.o
 obj-$(CONFIG_RTAS_PROC)		+= rtas-proc.o
-obj-$(CONFIG_LPARCFG)		+= lparcfg.o
 obj-$(CONFIG_IBMVIO)		+= vio.o
 obj-$(CONFIG_IBMEBUS)           += ibmebus.o
 obj-$(CONFIG_EEH)              += eeh.o eeh_pe.o eeh_dev.o eeh_cache.o \
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
deleted file mode 100644
index e738007eae64..000000000000
--- a/arch/powerpc/kernel/lparcfg.c
+++ /dev/null
@@ -1,710 +0,0 @@
-/*
- * PowerPC64 LPAR Configuration Information Driver
- *
- * Dave Engebretsen engebret@us.ibm.com
- *    Copyright (c) 2003 Dave Engebretsen
- * Will Schmidt willschm@us.ibm.com
- *    SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation.
- *    seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation.
- * Nathan Lynch nathanl@austin.ibm.com
- *    Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation.
- *
- *      This program is free software; you can redistribute it and/or
- *      modify it under the terms of the GNU General Public License
- *      as published by the Free Software Foundation; either version
- *      2 of the License, or (at your option) any later version.
- *
- * This driver creates a proc file at /proc/ppc64/lparcfg which contains
- * keyword - value pairs that specify the configuration of the partition.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/proc_fs.h>
-#include <linux/init.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <asm/uaccess.h>
-#include <asm/lppaca.h>
-#include <asm/hvcall.h>
-#include <asm/firmware.h>
-#include <asm/rtas.h>
-#include <asm/time.h>
-#include <asm/prom.h>
-#include <asm/vdso_datapage.h>
-#include <asm/vio.h>
-#include <asm/mmu.h>
-#include <asm/machdep.h>
-
-
-/*
- * This isn't a module but we expose that to userspace
- * via /proc so leave the definitions here
- */
-#define MODULE_VERS "1.9"
-#define MODULE_NAME "lparcfg"
-
-/* #define LPARCFG_DEBUG */
-
-/*
- * Track sum of all purrs across all processors. This is used to further
- * calculate usage values by different applications
- */
-static unsigned long get_purr(void)
-{
-	unsigned long sum_purr = 0;
-	int cpu;
-
-	for_each_possible_cpu(cpu) {
-		struct cpu_usage *cu;
-
-		cu = &per_cpu(cpu_usage_array, cpu);
-		sum_purr += cu->current_tb;
-	}
-	return sum_purr;
-}
-
-/*
- * Methods used to fetch LPAR data when running on a pSeries platform.
- */
-
-struct hvcall_ppp_data {
-	u64	entitlement;
-	u64	unallocated_entitlement;
-	u16	group_num;
-	u16	pool_num;
-	u8	capped;
-	u8	weight;
-	u8	unallocated_weight;
-	u16	active_procs_in_pool;
-	u16	active_system_procs;
-	u16	phys_platform_procs;
-	u32	max_proc_cap_avail;
-	u32	entitled_proc_cap_avail;
-};
-
-/*
- * H_GET_PPP hcall returns info in 4 parms.
- *  entitled_capacity,unallocated_capacity,
- *  aggregation, resource_capability).
- *
- *  R4 = Entitled Processor Capacity Percentage.
- *  R5 = Unallocated Processor Capacity Percentage.
- *  R6 (AABBCCDDEEFFGGHH).
- *      XXXX - reserved (0)
- *          XXXX - reserved (0)
- *              XXXX - Group Number
- *                  XXXX - Pool Number.
- *  R7 (IIJJKKLLMMNNOOPP).
- *      XX - reserved. (0)
- *        XX - bit 0-6 reserved (0).   bit 7 is Capped indicator.
- *          XX - variable processor Capacity Weight
- *            XX - Unallocated Variable Processor Capacity Weight.
- *              XXXX - Active processors in Physical Processor Pool.
- *                  XXXX  - Processors active on platform.
- *  R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
- *	XXXX - Physical platform procs allocated to virtualization.
- *	    XXXXXX - Max procs capacity % available to the partitions pool.
- *	          XXXXXX - Entitled procs capacity % available to the
- *			   partitions pool.
- */
-static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
-{
-	unsigned long rc;
-	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
-
-	rc = plpar_hcall9(H_GET_PPP, retbuf);
-
-	ppp_data->entitlement = retbuf[0];
-	ppp_data->unallocated_entitlement = retbuf[1];
-
-	ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
-	ppp_data->pool_num = retbuf[2] & 0xffff;
-
-	ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
-	ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
-	ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
-	ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
-	ppp_data->active_system_procs = retbuf[3] & 0xffff;
-
-	ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
-	ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
-	ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
-
-	return rc;
-}
-
-static unsigned h_pic(unsigned long *pool_idle_time,
-		      unsigned long *num_procs)
-{
-	unsigned long rc;
-	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
-
-	rc = plpar_hcall(H_PIC, retbuf);
-
-	*pool_idle_time = retbuf[0];
-	*num_procs = retbuf[1];
-
-	return rc;
-}
-
-/*
- * parse_ppp_data
- * Parse out the data returned from h_get_ppp and h_pic
- */
-static void parse_ppp_data(struct seq_file *m)
-{
-	struct hvcall_ppp_data ppp_data;
-	struct device_node *root;
-	const int *perf_level;
-	int rc;
-
-	rc = h_get_ppp(&ppp_data);
-	if (rc)
-		return;
-
-	seq_printf(m, "partition_entitled_capacity=%lld\n",
-	           ppp_data.entitlement);
-	seq_printf(m, "group=%d\n", ppp_data.group_num);
-	seq_printf(m, "system_active_processors=%d\n",
-	           ppp_data.active_system_procs);
-
-	/* pool related entries are appropriate for shared configs */
-	if (lppaca_shared_proc(get_lppaca())) {
-		unsigned long pool_idle_time, pool_procs;
-
-		seq_printf(m, "pool=%d\n", ppp_data.pool_num);
-
-		/* report pool_capacity in percentage */
-		seq_printf(m, "pool_capacity=%d\n",
-			   ppp_data.active_procs_in_pool * 100);
-
-		h_pic(&pool_idle_time, &pool_procs);
-		seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
-		seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
-	}
-
-	seq_printf(m, "unallocated_capacity_weight=%d\n",
-		   ppp_data.unallocated_weight);
-	seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
-	seq_printf(m, "capped=%d\n", ppp_data.capped);
-	seq_printf(m, "unallocated_capacity=%lld\n",
-		   ppp_data.unallocated_entitlement);
-
-	/* The last bits of information returned from h_get_ppp are only
-	 * valid if the ibm,partition-performance-parameters-level
-	 * property is >= 1.
-	 */
-	root = of_find_node_by_path("/");
-	if (root) {
-		perf_level = of_get_property(root,
-				"ibm,partition-performance-parameters-level",
-					     NULL);
-		if (perf_level && (*perf_level >= 1)) {
-			seq_printf(m,
-			    "physical_procs_allocated_to_virtualization=%d\n",
-				   ppp_data.phys_platform_procs);
-			seq_printf(m, "max_proc_capacity_available=%d\n",
-				   ppp_data.max_proc_cap_avail);
-			seq_printf(m, "entitled_proc_capacity_available=%d\n",
-				   ppp_data.entitled_proc_cap_avail);
-		}
-
-		of_node_put(root);
-	}
-}
-
-/**
- * parse_mpp_data
- * Parse out data returned from h_get_mpp
- */
-static void parse_mpp_data(struct seq_file *m)
-{
-	struct hvcall_mpp_data mpp_data;
-	int rc;
-
-	rc = h_get_mpp(&mpp_data);
-	if (rc)
-		return;
-
-	seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
-
-	if (mpp_data.mapped_mem != -1)
-		seq_printf(m, "mapped_entitled_memory=%ld\n",
-		           mpp_data.mapped_mem);
-
-	seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
-	seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
-
-	seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
-	seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
-	           mpp_data.unallocated_mem_weight);
-	seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
-	           mpp_data.unallocated_entitlement);
-
-	if (mpp_data.pool_size != -1)
-		seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
-		           mpp_data.pool_size);
-
-	seq_printf(m, "entitled_memory_loan_request=%ld\n",
-	           mpp_data.loan_request);
-
-	seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
-}
-
-/**
- * parse_mpp_x_data
- * Parse out data returned from h_get_mpp_x
- */
-static void parse_mpp_x_data(struct seq_file *m)
-{
-	struct hvcall_mpp_x_data mpp_x_data;
-
-	if (!firmware_has_feature(FW_FEATURE_XCMO))
-		return;
-	if (h_get_mpp_x(&mpp_x_data))
-		return;
-
-	seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
-
-	if (mpp_x_data.pool_coalesced_bytes)
-		seq_printf(m, "pool_coalesced_bytes=%ld\n",
-			   mpp_x_data.pool_coalesced_bytes);
-	if (mpp_x_data.pool_purr_cycles)
-		seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
-	if (mpp_x_data.pool_spurr_cycles)
-		seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
-}
-
-#define SPLPAR_CHARACTERISTICS_TOKEN 20
-#define SPLPAR_MAXLENGTH 1026*(sizeof(char))
-
-/*
- * parse_system_parameter_string()
- * Retrieve the potential_processors, max_entitled_capacity and friends
- * through the get-system-parameter rtas call.  Replace keyword strings as
- * necessary.
- */
-static void parse_system_parameter_string(struct seq_file *m)
-{
-	int call_status;
-
-	unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
-	if (!local_buffer) {
-		printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
-		       __FILE__, __func__, __LINE__);
-		return;
-	}
-
-	spin_lock(&rtas_data_buf_lock);
-	memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
-	call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
-				NULL,
-				SPLPAR_CHARACTERISTICS_TOKEN,
-				__pa(rtas_data_buf),
-				RTAS_DATA_BUF_SIZE);
-	memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
-	local_buffer[SPLPAR_MAXLENGTH - 1] = '\0';
-	spin_unlock(&rtas_data_buf_lock);
-
-	if (call_status != 0) {
-		printk(KERN_INFO
-		       "%s %s Error calling get-system-parameter (0x%x)\n",
-		       __FILE__, __func__, call_status);
-	} else {
-		int splpar_strlen;
-		int idx, w_idx;
-		char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
-		if (!workbuffer) {
-			printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
-			       __FILE__, __func__, __LINE__);
-			kfree(local_buffer);
-			return;
-		}
-#ifdef LPARCFG_DEBUG
-		printk(KERN_INFO "success calling get-system-parameter\n");
-#endif
-		splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
-		local_buffer += 2;	/* step over strlen value */
-
-		w_idx = 0;
-		idx = 0;
-		while ((*local_buffer) && (idx < splpar_strlen)) {
-			workbuffer[w_idx++] = local_buffer[idx++];
-			if ((local_buffer[idx] == ',')
-			    || (local_buffer[idx] == '\0')) {
-				workbuffer[w_idx] = '\0';
-				if (w_idx) {
-					/* avoid the empty string */
-					seq_printf(m, "%s\n", workbuffer);
-				}
-				memset(workbuffer, 0, SPLPAR_MAXLENGTH);
-				idx++;	/* skip the comma */
-				w_idx = 0;
-			} else if (local_buffer[idx] == '=') {
-				/* code here to replace workbuffer contents
-				   with different keyword strings */
-				if (0 == strcmp(workbuffer, "MaxEntCap")) {
-					strcpy(workbuffer,
-					       "partition_max_entitled_capacity");
-					w_idx = strlen(workbuffer);
-				}
-				if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
-					strcpy(workbuffer,
-					       "system_potential_processors");
-					w_idx = strlen(workbuffer);
-				}
-			}
-		}
-		kfree(workbuffer);
-		local_buffer -= 2;	/* back up over strlen value */
-	}
-	kfree(local_buffer);
-}
-
-/* Return the number of processors in the system.
- * This function reads through the device tree and counts
- * the virtual processors, this does not include threads.
- */
-static int lparcfg_count_active_processors(void)
-{
-	struct device_node *cpus_dn = NULL;
-	int count = 0;
-
-	while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
-#ifdef LPARCFG_DEBUG
-		printk(KERN_ERR "cpus_dn %p\n", cpus_dn);
-#endif
-		count++;
-	}
-	return count;
-}
-
-static void pseries_cmo_data(struct seq_file *m)
-{
-	int cpu;
-	unsigned long cmo_faults = 0;
-	unsigned long cmo_fault_time = 0;
-
-	seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
-
-	if (!firmware_has_feature(FW_FEATURE_CMO))
-		return;
-
-	for_each_possible_cpu(cpu) {
-		cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults);
-		cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time);
-	}
-
-	seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
-	seq_printf(m, "cmo_fault_time_usec=%lu\n",
-		   cmo_fault_time / tb_ticks_per_usec);
-	seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
-	seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
-	seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
-}
-
-static void splpar_dispatch_data(struct seq_file *m)
-{
-	int cpu;
-	unsigned long dispatches = 0;
-	unsigned long dispatch_dispersions = 0;
-
-	for_each_possible_cpu(cpu) {
-		dispatches += be32_to_cpu(lppaca_of(cpu).yield_count);
-		dispatch_dispersions +=
-			be32_to_cpu(lppaca_of(cpu).dispersion_count);
-	}
-
-	seq_printf(m, "dispatches=%lu\n", dispatches);
-	seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
-}
-
-static void parse_em_data(struct seq_file *m)
-{
-	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
-
-	if (firmware_has_feature(FW_FEATURE_LPAR) &&
-	    plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
-		seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
-}
-
-static int pseries_lparcfg_data(struct seq_file *m, void *v)
-{
-	int partition_potential_processors;
-	int partition_active_processors;
-	struct device_node *rtas_node;
-	const int *lrdrp = NULL;
-
-	rtas_node = of_find_node_by_path("/rtas");
-	if (rtas_node)
-		lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
-
-	if (lrdrp == NULL) {
-		partition_potential_processors = vdso_data->processorCount;
-	} else {
-		partition_potential_processors = *(lrdrp + 4);
-	}
-	of_node_put(rtas_node);
-
-	partition_active_processors = lparcfg_count_active_processors();
-
-	if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
-		/* this call handles the ibm,get-system-parameter contents */
-		parse_system_parameter_string(m);
-		parse_ppp_data(m);
-		parse_mpp_data(m);
-		parse_mpp_x_data(m);
-		pseries_cmo_data(m);
-		splpar_dispatch_data(m);
-
-		seq_printf(m, "purr=%ld\n", get_purr());
-	} else {		/* non SPLPAR case */
-
-		seq_printf(m, "system_active_processors=%d\n",
-			   partition_potential_processors);
-
-		seq_printf(m, "system_potential_processors=%d\n",
-			   partition_potential_processors);
-
-		seq_printf(m, "partition_max_entitled_capacity=%d\n",
-			   partition_potential_processors * 100);
-
-		seq_printf(m, "partition_entitled_capacity=%d\n",
-			   partition_active_processors * 100);
-	}
-
-	seq_printf(m, "partition_active_processors=%d\n",
-		   partition_active_processors);
-
-	seq_printf(m, "partition_potential_processors=%d\n",
-		   partition_potential_processors);
-
-	seq_printf(m, "shared_processor_mode=%d\n",
-		   lppaca_shared_proc(get_lppaca()));
-
-	seq_printf(m, "slb_size=%d\n", mmu_slb_size);
-
-	parse_em_data(m);
-
-	return 0;
-}
-
-static ssize_t update_ppp(u64 *entitlement, u8 *weight)
-{
-	struct hvcall_ppp_data ppp_data;
-	u8 new_weight;
-	u64 new_entitled;
-	ssize_t retval;
-
-	/* Get our current parameters */
-	retval = h_get_ppp(&ppp_data);
-	if (retval)
-		return retval;
-
-	if (entitlement) {
-		new_weight = ppp_data.weight;
-		new_entitled = *entitlement;
-	} else if (weight) {
-		new_weight = *weight;
-		new_entitled = ppp_data.entitlement;
-	} else
-		return -EINVAL;
-
-	pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
-		 __func__, ppp_data.entitlement, ppp_data.weight);
-
-	pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
-		 __func__, new_entitled, new_weight);
-
-	retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
-	return retval;
-}
-
-/**
- * update_mpp
- *
- * Update the memory entitlement and weight for the partition.  Caller must
- * specify either a new entitlement or weight, not both, to be updated
- * since the h_set_mpp call takes both entitlement and weight as parameters.
- */
-static ssize_t update_mpp(u64 *entitlement, u8 *weight)
-{
-	struct hvcall_mpp_data mpp_data;
-	u64 new_entitled;
-	u8 new_weight;
-	ssize_t rc;
-
-	if (entitlement) {
-		/* Check with vio to ensure the new memory entitlement
-		 * can be handled.
-		 */
-		rc = vio_cmo_entitlement_update(*entitlement);
-		if (rc)
-			return rc;
-	}
-
-	rc = h_get_mpp(&mpp_data);
-	if (rc)
-		return rc;
-
-	if (entitlement) {
-		new_weight = mpp_data.mem_weight;
-		new_entitled = *entitlement;
-	} else if (weight) {
-		new_weight = *weight;
-		new_entitled = mpp_data.entitled_mem;
-	} else
-		return -EINVAL;
-
-	pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
-	         __func__, mpp_data.entitled_mem, mpp_data.mem_weight);
-
-	pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
-		 __func__, new_entitled, new_weight);
-
-	rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
-	return rc;
-}
-
-/*
- * Interface for changing system parameters (variable capacity weight
- * and entitled capacity).  Format of input is "param_name=value";
- * anything after value is ignored.  Valid parameters at this time are
- * "partition_entitled_capacity" and "capacity_weight".  We use
- * H_SET_PPP to alter parameters.
- *
- * This function should be invoked only on systems with
- * FW_FEATURE_SPLPAR.
- */
-static ssize_t lparcfg_write(struct file *file, const char __user * buf,
-			     size_t count, loff_t * off)
-{
-	int kbuf_sz = 64;
-	char kbuf[kbuf_sz];
-	char *tmp;
-	u64 new_entitled, *new_entitled_ptr = &new_entitled;
-	u8 new_weight, *new_weight_ptr = &new_weight;
-	ssize_t retval;
-
-	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
-		return -EINVAL;
-
-	if (count > kbuf_sz)
-		return -EINVAL;
-
-	if (copy_from_user(kbuf, buf, count))
-		return -EFAULT;
-
-	kbuf[count - 1] = '\0';
-	tmp = strchr(kbuf, '=');
-	if (!tmp)
-		return -EINVAL;
-
-	*tmp++ = '\0';
-
-	if (!strcmp(kbuf, "partition_entitled_capacity")) {
-		char *endp;
-		*new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
-		if (endp == tmp)
-			return -EINVAL;
-
-		retval = update_ppp(new_entitled_ptr, NULL);
-	} else if (!strcmp(kbuf, "capacity_weight")) {
-		char *endp;
-		*new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
-		if (endp == tmp)
-			return -EINVAL;
-
-		retval = update_ppp(NULL, new_weight_ptr);
-	} else if (!strcmp(kbuf, "entitled_memory")) {
-		char *endp;
-		*new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
-		if (endp == tmp)
-			return -EINVAL;
-
-		retval = update_mpp(new_entitled_ptr, NULL);
-	} else if (!strcmp(kbuf, "entitled_memory_weight")) {
-		char *endp;
-		*new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
-		if (endp == tmp)
-			return -EINVAL;
-
-		retval = update_mpp(NULL, new_weight_ptr);
-	} else
-		return -EINVAL;
-
-	if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
-		retval = count;
-	} else if (retval == H_BUSY) {
-		retval = -EBUSY;
-	} else if (retval == H_HARDWARE) {
-		retval = -EIO;
-	} else if (retval == H_PARAMETER) {
-		retval = -EINVAL;
-	}
-
-	return retval;
-}
-
-static int lparcfg_data(struct seq_file *m, void *v)
-{
-	struct device_node *rootdn;
-	const char *model = "";
-	const char *system_id = "";
-	const char *tmp;
-	const unsigned int *lp_index_ptr;
-	unsigned int lp_index = 0;
-
-	seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
-
-	rootdn = of_find_node_by_path("/");
-	if (rootdn) {
-		tmp = of_get_property(rootdn, "model", NULL);
-		if (tmp)
-			model = tmp;
-		tmp = of_get_property(rootdn, "system-id", NULL);
-		if (tmp)
-			system_id = tmp;
-		lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
-					NULL);
-		if (lp_index_ptr)
-			lp_index = *lp_index_ptr;
-		of_node_put(rootdn);
-	}
-	seq_printf(m, "serial_number=%s\n", system_id);
-	seq_printf(m, "system_type=%s\n", model);
-	seq_printf(m, "partition_id=%d\n", (int)lp_index);
-
-	return pseries_lparcfg_data(m, v);
-}
-
-static int lparcfg_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, lparcfg_data, NULL);
-}
-
-static const struct file_operations lparcfg_fops = {
-	.read		= seq_read,
-	.write		= lparcfg_write,
-	.open		= lparcfg_open,
-	.release	= single_release,
-	.llseek		= seq_lseek,
-};
-
-static int __init lparcfg_init(void)
-{
-	umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
-
-	/* Allow writing if we have FW_FEATURE_SPLPAR */
-	if (firmware_has_feature(FW_FEATURE_SPLPAR))
-		mode |= S_IWUSR;
-
-	if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops)) {
-		printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
-		return -EIO;
-	}
-	return 0;
-}
-machine_device_initcall(pseries, lparcfg_init);
diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile
index 8ae010381316..6c61ec5ee914 100644
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_CMM)		+= cmm.o
 obj-$(CONFIG_DTL)		+= dtl.o
 obj-$(CONFIG_IO_EVENT_IRQ)	+= io_event_irq.o
 obj-$(CONFIG_PSERIES_IDLE)	+= processor_idle.o
+obj-$(CONFIG_LPARCFG)		+= lparcfg.o
 
 ifeq ($(CONFIG_PPC_PSERIES),y)
 obj-$(CONFIG_SUSPEND)		+= suspend.o
diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c
new file mode 100644
index 000000000000..e738007eae64
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/lparcfg.c
@@ -0,0 +1,710 @@
+/*
+ * PowerPC64 LPAR Configuration Information Driver
+ *
+ * Dave Engebretsen engebret@us.ibm.com
+ *    Copyright (c) 2003 Dave Engebretsen
+ * Will Schmidt willschm@us.ibm.com
+ *    SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation.
+ *    seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation.
+ * Nathan Lynch nathanl@austin.ibm.com
+ *    Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation.
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ *
+ * This driver creates a proc file at /proc/ppc64/lparcfg which contains
+ * keyword - value pairs that specify the configuration of the partition.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <asm/uaccess.h>
+#include <asm/lppaca.h>
+#include <asm/hvcall.h>
+#include <asm/firmware.h>
+#include <asm/rtas.h>
+#include <asm/time.h>
+#include <asm/prom.h>
+#include <asm/vdso_datapage.h>
+#include <asm/vio.h>
+#include <asm/mmu.h>
+#include <asm/machdep.h>
+
+
+/*
+ * This isn't a module but we expose that to userspace
+ * via /proc so leave the definitions here
+ */
+#define MODULE_VERS "1.9"
+#define MODULE_NAME "lparcfg"
+
+/* #define LPARCFG_DEBUG */
+
+/*
+ * Track sum of all purrs across all processors. This is used to further
+ * calculate usage values by different applications
+ */
+static unsigned long get_purr(void)
+{
+	unsigned long sum_purr = 0;
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		struct cpu_usage *cu;
+
+		cu = &per_cpu(cpu_usage_array, cpu);
+		sum_purr += cu->current_tb;
+	}
+	return sum_purr;
+}
+
+/*
+ * Methods used to fetch LPAR data when running on a pSeries platform.
+ */
+
+struct hvcall_ppp_data {
+	u64	entitlement;
+	u64	unallocated_entitlement;
+	u16	group_num;
+	u16	pool_num;
+	u8	capped;
+	u8	weight;
+	u8	unallocated_weight;
+	u16	active_procs_in_pool;
+	u16	active_system_procs;
+	u16	phys_platform_procs;
+	u32	max_proc_cap_avail;
+	u32	entitled_proc_cap_avail;
+};
+
+/*
+ * H_GET_PPP hcall returns info in 4 parms.
+ *  entitled_capacity,unallocated_capacity,
+ *  aggregation, resource_capability).
+ *
+ *  R4 = Entitled Processor Capacity Percentage.
+ *  R5 = Unallocated Processor Capacity Percentage.
+ *  R6 (AABBCCDDEEFFGGHH).
+ *      XXXX - reserved (0)
+ *          XXXX - reserved (0)
+ *              XXXX - Group Number
+ *                  XXXX - Pool Number.
+ *  R7 (IIJJKKLLMMNNOOPP).
+ *      XX - reserved. (0)
+ *        XX - bit 0-6 reserved (0).   bit 7 is Capped indicator.
+ *          XX - variable processor Capacity Weight
+ *            XX - Unallocated Variable Processor Capacity Weight.
+ *              XXXX - Active processors in Physical Processor Pool.
+ *                  XXXX  - Processors active on platform.
+ *  R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
+ *	XXXX - Physical platform procs allocated to virtualization.
+ *	    XXXXXX - Max procs capacity % available to the partitions pool.
+ *	          XXXXXX - Entitled procs capacity % available to the
+ *			   partitions pool.
+ */
+static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
+{
+	unsigned long rc;
+	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
+
+	rc = plpar_hcall9(H_GET_PPP, retbuf);
+
+	ppp_data->entitlement = retbuf[0];
+	ppp_data->unallocated_entitlement = retbuf[1];
+
+	ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
+	ppp_data->pool_num = retbuf[2] & 0xffff;
+
+	ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
+	ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
+	ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
+	ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
+	ppp_data->active_system_procs = retbuf[3] & 0xffff;
+
+	ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
+	ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
+	ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
+
+	return rc;
+}
+
+static unsigned h_pic(unsigned long *pool_idle_time,
+		      unsigned long *num_procs)
+{
+	unsigned long rc;
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+	rc = plpar_hcall(H_PIC, retbuf);
+
+	*pool_idle_time = retbuf[0];
+	*num_procs = retbuf[1];
+
+	return rc;
+}
+
+/*
+ * parse_ppp_data
+ * Parse out the data returned from h_get_ppp and h_pic
+ */
+static void parse_ppp_data(struct seq_file *m)
+{
+	struct hvcall_ppp_data ppp_data;
+	struct device_node *root;
+	const int *perf_level;
+	int rc;
+
+	rc = h_get_ppp(&ppp_data);
+	if (rc)
+		return;
+
+	seq_printf(m, "partition_entitled_capacity=%lld\n",
+	           ppp_data.entitlement);
+	seq_printf(m, "group=%d\n", ppp_data.group_num);
+	seq_printf(m, "system_active_processors=%d\n",
+	           ppp_data.active_system_procs);
+
+	/* pool related entries are appropriate for shared configs */
+	if (lppaca_shared_proc(get_lppaca())) {
+		unsigned long pool_idle_time, pool_procs;
+
+		seq_printf(m, "pool=%d\n", ppp_data.pool_num);
+
+		/* report pool_capacity in percentage */
+		seq_printf(m, "pool_capacity=%d\n",
+			   ppp_data.active_procs_in_pool * 100);
+
+		h_pic(&pool_idle_time, &pool_procs);
+		seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
+		seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
+	}
+
+	seq_printf(m, "unallocated_capacity_weight=%d\n",
+		   ppp_data.unallocated_weight);
+	seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
+	seq_printf(m, "capped=%d\n", ppp_data.capped);
+	seq_printf(m, "unallocated_capacity=%lld\n",
+		   ppp_data.unallocated_entitlement);
+
+	/* The last bits of information returned from h_get_ppp are only
+	 * valid if the ibm,partition-performance-parameters-level
+	 * property is >= 1.
+	 */
+	root = of_find_node_by_path("/");
+	if (root) {
+		perf_level = of_get_property(root,
+				"ibm,partition-performance-parameters-level",
+					     NULL);
+		if (perf_level && (*perf_level >= 1)) {
+			seq_printf(m,
+			    "physical_procs_allocated_to_virtualization=%d\n",
+				   ppp_data.phys_platform_procs);
+			seq_printf(m, "max_proc_capacity_available=%d\n",
+				   ppp_data.max_proc_cap_avail);
+			seq_printf(m, "entitled_proc_capacity_available=%d\n",
+				   ppp_data.entitled_proc_cap_avail);
+		}
+
+		of_node_put(root);
+	}
+}
+
+/**
+ * parse_mpp_data
+ * Parse out data returned from h_get_mpp
+ */
+static void parse_mpp_data(struct seq_file *m)
+{
+	struct hvcall_mpp_data mpp_data;
+	int rc;
+
+	rc = h_get_mpp(&mpp_data);
+	if (rc)
+		return;
+
+	seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
+
+	if (mpp_data.mapped_mem != -1)
+		seq_printf(m, "mapped_entitled_memory=%ld\n",
+		           mpp_data.mapped_mem);
+
+	seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
+	seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
+
+	seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
+	seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
+	           mpp_data.unallocated_mem_weight);
+	seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
+	           mpp_data.unallocated_entitlement);
+
+	if (mpp_data.pool_size != -1)
+		seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
+		           mpp_data.pool_size);
+
+	seq_printf(m, "entitled_memory_loan_request=%ld\n",
+	           mpp_data.loan_request);
+
+	seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
+}
+
+/**
+ * parse_mpp_x_data
+ * Parse out data returned from h_get_mpp_x
+ */
+static void parse_mpp_x_data(struct seq_file *m)
+{
+	struct hvcall_mpp_x_data mpp_x_data;
+
+	if (!firmware_has_feature(FW_FEATURE_XCMO))
+		return;
+	if (h_get_mpp_x(&mpp_x_data))
+		return;
+
+	seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
+
+	if (mpp_x_data.pool_coalesced_bytes)
+		seq_printf(m, "pool_coalesced_bytes=%ld\n",
+			   mpp_x_data.pool_coalesced_bytes);
+	if (mpp_x_data.pool_purr_cycles)
+		seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
+	if (mpp_x_data.pool_spurr_cycles)
+		seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
+}
+
+#define SPLPAR_CHARACTERISTICS_TOKEN 20
+#define SPLPAR_MAXLENGTH 1026*(sizeof(char))
+
+/*
+ * parse_system_parameter_string()
+ * Retrieve the potential_processors, max_entitled_capacity and friends
+ * through the get-system-parameter rtas call.  Replace keyword strings as
+ * necessary.
+ */
+static void parse_system_parameter_string(struct seq_file *m)
+{
+	int call_status;
+
+	unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
+	if (!local_buffer) {
+		printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
+		       __FILE__, __func__, __LINE__);
+		return;
+	}
+
+	spin_lock(&rtas_data_buf_lock);
+	memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
+	call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
+				NULL,
+				SPLPAR_CHARACTERISTICS_TOKEN,
+				__pa(rtas_data_buf),
+				RTAS_DATA_BUF_SIZE);
+	memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
+	local_buffer[SPLPAR_MAXLENGTH - 1] = '\0';
+	spin_unlock(&rtas_data_buf_lock);
+
+	if (call_status != 0) {
+		printk(KERN_INFO
+		       "%s %s Error calling get-system-parameter (0x%x)\n",
+		       __FILE__, __func__, call_status);
+	} else {
+		int splpar_strlen;
+		int idx, w_idx;
+		char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
+		if (!workbuffer) {
+			printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
+			       __FILE__, __func__, __LINE__);
+			kfree(local_buffer);
+			return;
+		}
+#ifdef LPARCFG_DEBUG
+		printk(KERN_INFO "success calling get-system-parameter\n");
+#endif
+		splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
+		local_buffer += 2;	/* step over strlen value */
+
+		w_idx = 0;
+		idx = 0;
+		while ((*local_buffer) && (idx < splpar_strlen)) {
+			workbuffer[w_idx++] = local_buffer[idx++];
+			if ((local_buffer[idx] == ',')
+			    || (local_buffer[idx] == '\0')) {
+				workbuffer[w_idx] = '\0';
+				if (w_idx) {
+					/* avoid the empty string */
+					seq_printf(m, "%s\n", workbuffer);
+				}
+				memset(workbuffer, 0, SPLPAR_MAXLENGTH);
+				idx++;	/* skip the comma */
+				w_idx = 0;
+			} else if (local_buffer[idx] == '=') {
+				/* code here to replace workbuffer contents
+				   with different keyword strings */
+				if (0 == strcmp(workbuffer, "MaxEntCap")) {
+					strcpy(workbuffer,
+					       "partition_max_entitled_capacity");
+					w_idx = strlen(workbuffer);
+				}
+				if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
+					strcpy(workbuffer,
+					       "system_potential_processors");
+					w_idx = strlen(workbuffer);
+				}
+			}
+		}
+		kfree(workbuffer);
+		local_buffer -= 2;	/* back up over strlen value */
+	}
+	kfree(local_buffer);
+}
+
+/* Return the number of processors in the system.
+ * This function reads through the device tree and counts
+ * the virtual processors, this does not include threads.
+ */
+static int lparcfg_count_active_processors(void)
+{
+	struct device_node *cpus_dn = NULL;
+	int count = 0;
+
+	while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
+#ifdef LPARCFG_DEBUG
+		printk(KERN_ERR "cpus_dn %p\n", cpus_dn);
+#endif
+		count++;
+	}
+	return count;
+}
+
+static void pseries_cmo_data(struct seq_file *m)
+{
+	int cpu;
+	unsigned long cmo_faults = 0;
+	unsigned long cmo_fault_time = 0;
+
+	seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
+
+	if (!firmware_has_feature(FW_FEATURE_CMO))
+		return;
+
+	for_each_possible_cpu(cpu) {
+		cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults);
+		cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time);
+	}
+
+	seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
+	seq_printf(m, "cmo_fault_time_usec=%lu\n",
+		   cmo_fault_time / tb_ticks_per_usec);
+	seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
+	seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
+	seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
+}
+
+static void splpar_dispatch_data(struct seq_file *m)
+{
+	int cpu;
+	unsigned long dispatches = 0;
+	unsigned long dispatch_dispersions = 0;
+
+	for_each_possible_cpu(cpu) {
+		dispatches += be32_to_cpu(lppaca_of(cpu).yield_count);
+		dispatch_dispersions +=
+			be32_to_cpu(lppaca_of(cpu).dispersion_count);
+	}
+
+	seq_printf(m, "dispatches=%lu\n", dispatches);
+	seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
+}
+
+static void parse_em_data(struct seq_file *m)
+{
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+	if (firmware_has_feature(FW_FEATURE_LPAR) &&
+	    plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
+		seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
+}
+
+static int pseries_lparcfg_data(struct seq_file *m, void *v)
+{
+	int partition_potential_processors;
+	int partition_active_processors;
+	struct device_node *rtas_node;
+	const int *lrdrp = NULL;
+
+	rtas_node = of_find_node_by_path("/rtas");
+	if (rtas_node)
+		lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
+
+	if (lrdrp == NULL) {
+		partition_potential_processors = vdso_data->processorCount;
+	} else {
+		partition_potential_processors = *(lrdrp + 4);
+	}
+	of_node_put(rtas_node);
+
+	partition_active_processors = lparcfg_count_active_processors();
+
+	if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
+		/* this call handles the ibm,get-system-parameter contents */
+		parse_system_parameter_string(m);
+		parse_ppp_data(m);
+		parse_mpp_data(m);
+		parse_mpp_x_data(m);
+		pseries_cmo_data(m);
+		splpar_dispatch_data(m);
+
+		seq_printf(m, "purr=%ld\n", get_purr());
+	} else {		/* non SPLPAR case */
+
+		seq_printf(m, "system_active_processors=%d\n",
+			   partition_potential_processors);
+
+		seq_printf(m, "system_potential_processors=%d\n",
+			   partition_potential_processors);
+
+		seq_printf(m, "partition_max_entitled_capacity=%d\n",
+			   partition_potential_processors * 100);
+
+		seq_printf(m, "partition_entitled_capacity=%d\n",
+			   partition_active_processors * 100);
+	}
+
+	seq_printf(m, "partition_active_processors=%d\n",
+		   partition_active_processors);
+
+	seq_printf(m, "partition_potential_processors=%d\n",
+		   partition_potential_processors);
+
+	seq_printf(m, "shared_processor_mode=%d\n",
+		   lppaca_shared_proc(get_lppaca()));
+
+	seq_printf(m, "slb_size=%d\n", mmu_slb_size);
+
+	parse_em_data(m);
+
+	return 0;
+}
+
+static ssize_t update_ppp(u64 *entitlement, u8 *weight)
+{
+	struct hvcall_ppp_data ppp_data;
+	u8 new_weight;
+	u64 new_entitled;
+	ssize_t retval;
+
+	/* Get our current parameters */
+	retval = h_get_ppp(&ppp_data);
+	if (retval)
+		return retval;
+
+	if (entitlement) {
+		new_weight = ppp_data.weight;
+		new_entitled = *entitlement;
+	} else if (weight) {
+		new_weight = *weight;
+		new_entitled = ppp_data.entitlement;
+	} else
+		return -EINVAL;
+
+	pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
+		 __func__, ppp_data.entitlement, ppp_data.weight);
+
+	pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
+		 __func__, new_entitled, new_weight);
+
+	retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
+	return retval;
+}
+
+/**
+ * update_mpp
+ *
+ * Update the memory entitlement and weight for the partition.  Caller must
+ * specify either a new entitlement or weight, not both, to be updated
+ * since the h_set_mpp call takes both entitlement and weight as parameters.
+ */
+static ssize_t update_mpp(u64 *entitlement, u8 *weight)
+{
+	struct hvcall_mpp_data mpp_data;
+	u64 new_entitled;
+	u8 new_weight;
+	ssize_t rc;
+
+	if (entitlement) {
+		/* Check with vio to ensure the new memory entitlement
+		 * can be handled.
+		 */
+		rc = vio_cmo_entitlement_update(*entitlement);
+		if (rc)
+			return rc;
+	}
+
+	rc = h_get_mpp(&mpp_data);
+	if (rc)
+		return rc;
+
+	if (entitlement) {
+		new_weight = mpp_data.mem_weight;
+		new_entitled = *entitlement;
+	} else if (weight) {
+		new_weight = *weight;
+		new_entitled = mpp_data.entitled_mem;
+	} else
+		return -EINVAL;
+
+	pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
+	         __func__, mpp_data.entitled_mem, mpp_data.mem_weight);
+
+	pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
+		 __func__, new_entitled, new_weight);
+
+	rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
+	return rc;
+}
+
+/*
+ * Interface for changing system parameters (variable capacity weight
+ * and entitled capacity).  Format of input is "param_name=value";
+ * anything after value is ignored.  Valid parameters at this time are
+ * "partition_entitled_capacity" and "capacity_weight".  We use
+ * H_SET_PPP to alter parameters.
+ *
+ * This function should be invoked only on systems with
+ * FW_FEATURE_SPLPAR.
+ */
+static ssize_t lparcfg_write(struct file *file, const char __user * buf,
+			     size_t count, loff_t * off)
+{
+	int kbuf_sz = 64;
+	char kbuf[kbuf_sz];
+	char *tmp;
+	u64 new_entitled, *new_entitled_ptr = &new_entitled;
+	u8 new_weight, *new_weight_ptr = &new_weight;
+	ssize_t retval;
+
+	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
+		return -EINVAL;
+
+	if (count > kbuf_sz)
+		return -EINVAL;
+
+	if (copy_from_user(kbuf, buf, count))
+		return -EFAULT;
+
+	kbuf[count - 1] = '\0';
+	tmp = strchr(kbuf, '=');
+	if (!tmp)
+		return -EINVAL;
+
+	*tmp++ = '\0';
+
+	if (!strcmp(kbuf, "partition_entitled_capacity")) {
+		char *endp;
+		*new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
+		if (endp == tmp)
+			return -EINVAL;
+
+		retval = update_ppp(new_entitled_ptr, NULL);
+	} else if (!strcmp(kbuf, "capacity_weight")) {
+		char *endp;
+		*new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
+		if (endp == tmp)
+			return -EINVAL;
+
+		retval = update_ppp(NULL, new_weight_ptr);
+	} else if (!strcmp(kbuf, "entitled_memory")) {
+		char *endp;
+		*new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
+		if (endp == tmp)
+			return -EINVAL;
+
+		retval = update_mpp(new_entitled_ptr, NULL);
+	} else if (!strcmp(kbuf, "entitled_memory_weight")) {
+		char *endp;
+		*new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
+		if (endp == tmp)
+			return -EINVAL;
+
+		retval = update_mpp(NULL, new_weight_ptr);
+	} else
+		return -EINVAL;
+
+	if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
+		retval = count;
+	} else if (retval == H_BUSY) {
+		retval = -EBUSY;
+	} else if (retval == H_HARDWARE) {
+		retval = -EIO;
+	} else if (retval == H_PARAMETER) {
+		retval = -EINVAL;
+	}
+
+	return retval;
+}
+
+static int lparcfg_data(struct seq_file *m, void *v)
+{
+	struct device_node *rootdn;
+	const char *model = "";
+	const char *system_id = "";
+	const char *tmp;
+	const unsigned int *lp_index_ptr;
+	unsigned int lp_index = 0;
+
+	seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
+
+	rootdn = of_find_node_by_path("/");
+	if (rootdn) {
+		tmp = of_get_property(rootdn, "model", NULL);
+		if (tmp)
+			model = tmp;
+		tmp = of_get_property(rootdn, "system-id", NULL);
+		if (tmp)
+			system_id = tmp;
+		lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
+					NULL);
+		if (lp_index_ptr)
+			lp_index = *lp_index_ptr;
+		of_node_put(rootdn);
+	}
+	seq_printf(m, "serial_number=%s\n", system_id);
+	seq_printf(m, "system_type=%s\n", model);
+	seq_printf(m, "partition_id=%d\n", (int)lp_index);
+
+	return pseries_lparcfg_data(m, v);
+}
+
+static int lparcfg_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, lparcfg_data, NULL);
+}
+
+static const struct file_operations lparcfg_fops = {
+	.read		= seq_read,
+	.write		= lparcfg_write,
+	.open		= lparcfg_open,
+	.release	= single_release,
+	.llseek		= seq_lseek,
+};
+
+static int __init lparcfg_init(void)
+{
+	umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
+
+	/* Allow writing if we have FW_FEATURE_SPLPAR */
+	if (firmware_has_feature(FW_FEATURE_SPLPAR))
+		mode |= S_IWUSR;
+
+	if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops)) {
+		printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
+		return -EIO;
+	}
+	return 0;
+}
+machine_device_initcall(pseries, lparcfg_init);
-- 
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