user/sven/linux.git/arch/powerpc/kernel/Makefile, branch v4.4.27

powerpc/ftrace: add powerpc timebase as a trace clock source

2015-08-06T06:36:23Z

Add a new powerpc-specific trace clock using the timebase register, similar to x86-tsc. This gives us - a fast, monotonic, hardware clock source for trace entries, and - a clock that can be used to correlate events across cpus as well as across hypervisor and guests. Signed-off-by: Naveen N. Rao Acked-by: Steven Rostedt Signed-off-by: Michael Ellerman

Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux

2015-07-02T02:40:18Z

Pull devicetree updates from Grant Likely: "A whole lot of bug fixes. Nothing stands out here except the ability to enable CONFIG_OF on every architecture, and an import of a newer version of dtc" * tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux: (22 commits) of/irq: Rename "intc_desc" to "of_intc_desc" to fix OF on sh of/irq: Fix pSeries boot failure Documentation: DT: Fix a typo in the filename "lantiq,-pinumx.txt" of: define of_find_node_by_phandle for !CONFIG_OF of/address: use atomic allocation in pci_register_io_range() of: Add vendor prefix for Zodiac Inflight Innovations dt/fdt: add empty versions of early_init_dt_*_memory_arch of: clean-up unnecessary libfdt include paths of: make unittest select OF_EARLY_FLATTREE instead of depend on it of: make CONFIG_OF user selectable MIPS: prepare for user enabling of CONFIG_OF of/fdt: fix argument name and add comments of unflatten_dt_node() of: return NUMA_NO_NODE from fallback of_node_to_nid() tps6507x.txt: Remove executable permission of/overlay: Grammar s/an negative/a negative/ of/fdt: Make fdt blob input parameters of unflatten functions const of: add helper function to retrive match data of: Grammar s/property exist/property exists/ of: Move OF flags to be visible even when !CONFIG_OF scripts/dtc: Update to upstream version 9d3649bd3be245c9 ...

of: clean-up unnecessary libfdt include paths

2015-06-05T01:16:47Z

With the libfdt include fixups to use "" instead of <> in the latest dtc import in commit 4760597 (scripts/dtc: Update to upstream version 9d3649bd3be245c9), it is no longer necessary to add explicit include paths to use libfdt. Remove these across the kernel. Signed-off-by: Rob Herring Acked-by: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Acked-by: Michael Ellerman Acked-by: Grant Likely Cc: linux-mips@linux-mips.org Cc: linuxppc-dev@lists.ozlabs.org

powerpc/vdso: Disable building the 32-bit VDSO on little endian

2015-05-11T10:01:02Z

The only little endian configuration we support is ppc64le. As such if we're building little endian we don't need a 32-bit VDSO, because there is no 32-bit userspace. This patch is a fairly ugly mess of #ifdefs, but is the minimal logic required to disable the 32-bit VDSO. We can hopefully clean up the result in future with some further refactoring. Signed-off-by: Michael Ellerman

powerpc: kill PPC_OF

2015-03-17T09:04:32Z

We have set CONFIG_PPC_OF to always 'y' in commit 0a498d96a332 ("powerpc: set CONFIG_PPC_OF=y always for ARCH=powerpc") nine years ago. And the arch/ppc also has gone away for many years. The OF functionality was also moved to a common place and be used by many archs. So it does make no sense to keep such a option in the current kernel. Just kill it. Signed-off-by: Kevin Hao Acked-by: Benjamin Herrenschmidt Signed-off-by: Michael Ellerman

powerpc: Separate ppc32 symbol exports into ppc_ksyms_32.c

2014-09-25T13:14:40Z

Simplify things considerably by moving all the ppc32 specific symbol exports into its own file. Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman

powerpc: Remove platforms/wsp and associated pieces

2014-06-11T06:35:38Z

__attribute__ ((unused)) WSP is the last user of CONFIG_PPC_A2, so we remove that as well. Although CONFIG_PPC_ICSWX still exists, it's no longer selectable for any Book3E platform, so we can remove the code in mmu-book3e.h that depended on it. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt

powerpc: use libfdt accessors for header data

2014-04-30T05:59:18Z

With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Tested-by: Grant Likely Tested-by: Stephen Chivers

clk: mpc5xxx: switch to COMMON_CLK, retire PPC_CLOCK

2014-01-12T17:53:04Z

the setup before the change was - arch/powerpc/Kconfig had the PPC_CLOCK option, off by default - depending on the PPC_CLOCK option the arch/powerpc/kernel/clock.c file was built, which implements the clk.h API but always returns -ENOSYS unless a platform registers specific callbacks - the MPC52xx platform selected PPC_CLOCK but did not register any callbacks, thus all clk.h API calls keep resulting in -ENOSYS errors (which is OK, all peripheral drivers deal with the situation) - the MPC512x platform selected PPC_CLOCK and registered specific callbacks implemented in arch/powerpc/platforms/512x/clock.c, thus provided real support for the clock API - no other powerpc platform did select PPC_CLOCK the situation after the change is - the MPC512x platform implements the COMMON_CLK interface, and thus the PPC_CLOCK approach in arch/powerpc/platforms/512x/clock.c has become obsolete - the MPC52xx platform still lacks genuine support for the clk.h API while this is not a change against the previous situation (the error code returned from COMMON_CLK stubs differs but every call still results in an error) - with all references gone, the arch/powerpc/kernel/clock.c wrapper and the PPC_CLOCK option have become obsolete, as did the clk_interface.h header file the switch from PPC_CLOCK to COMMON_CLK is done for all platforms within the same commit such that multiplatform kernels (the combination of 512x and 52xx within one executable) keep working Cc: Mike Turquette Cc: Anatolij Gustschin Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Gerhard Sittig Signed-off-by: Anatolij Gustschin

powerpc/book3s: Decode and save machine check event.

2013-12-05T05:05:20Z

Now that we handle machine check in linux, the MCE decoding should also take place in linux host. This info is crucial to log before we go down in case we can not handle the machine check errors. This patch decodes and populates a machine check event which contain high level meaning full MCE information. We do this in real mode C code with ME bit on. The MCE information is still available on emergency stack (in pt_regs structure format). Even if we take another exception at this point the MCE early handler will allocate a new stack frame on top of current one. So when we return back here we still have our MCE information safe on current stack. We use per cpu buffer to save high level MCE information. Each per cpu buffer is an array of machine check event structure indexed by per cpu counter mce_nest_count. The mce_nest_count is incremented every time we enter machine check early handler in real mode to get the current free slot (index = mce_nest_count - 1). The mce_nest_count is decremented once the MCE info is consumed by virtual mode machine exception handler. This patch provides save_mce_event(), get_mce_event() and release_mce_event() generic routines that can be used by machine check handlers to populate and retrieve the event. The routine release_mce_event() will free the event slot so that it can be reused. Caller can invoke get_mce_event() with a release flag either to release the event slot immediately OR keep it so that it can be fetched again. The event slot can be also released anytime by invoking release_mce_event(). This patch also updates kvm code to invoke get_mce_event to retrieve generic mce event rather than paca->opal_mce_evt. The KVM code always calls get_mce_event() with release flags set to false so that event is available for linus host machine If machine check occurs while we are in guest, KVM tries to handle the error. If KVM is able to handle MC error successfully, it enters the guest and delivers the machine check to guest. If KVM is not able to handle MC error, it exists the guest and passes the control to linux host machine check handler which then logs MC event and decides how to handle it in linux host. In failure case, KVM needs to make sure that the MC event is available for linux host to consume. Hence KVM always calls get_mce_event() with release flags set to false and later it invokes release_mce_event() only if it succeeds to handle error. Signed-off-by: Mahesh Salgaonkar Signed-off-by: Benjamin Herrenschmidt