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-rw-r--r--arch/um/include/asm/current.h5
-rw-r--r--arch/um/include/asm/hardirq.h24
-rw-r--r--arch/um/include/asm/irqflags.h4
-rw-r--r--arch/um/include/asm/kasan.h4
-rw-r--r--arch/um/include/asm/mmu.h10
-rw-r--r--arch/um/include/asm/page.h4
-rw-r--r--arch/um/include/asm/pgtable.h8
-rw-r--r--arch/um/include/asm/smp.h15
-rw-r--r--arch/um/include/asm/uaccess.h9
-rw-r--r--arch/um/include/linux/smp-internal.h17
-rw-r--r--arch/um/include/linux/time-internal.h3
-rw-r--r--arch/um/include/shared/as-layout.h1
-rw-r--r--arch/um/include/shared/common-offsets.h20
-rw-r--r--arch/um/include/shared/kern_util.h5
-rw-r--r--arch/um/include/shared/longjmp.h3
-rw-r--r--arch/um/include/shared/mem_user.h13
-rw-r--r--arch/um/include/shared/os.h24
-rw-r--r--arch/um/include/shared/skas/mm_id.h5
-rw-r--r--arch/um/include/shared/skas/skas.h2
-rw-r--r--arch/um/include/shared/smp.h20
20 files changed, 129 insertions, 67 deletions
diff --git a/arch/um/include/asm/current.h b/arch/um/include/asm/current.h
index 8accc6d6f502..159a29b3d4cc 100644
--- a/arch/um/include/asm/current.h
+++ b/arch/um/include/asm/current.h
@@ -7,15 +7,16 @@
#ifndef __ASSEMBLER__
+#include <shared/smp.h>
+
struct task_struct;
extern struct task_struct *cpu_tasks[NR_CPUS];
static __always_inline struct task_struct *get_current(void)
{
- return cpu_tasks[0];
+ return cpu_tasks[uml_curr_cpu()];
}
-
#define current get_current()
#endif /* __ASSEMBLER__ */
diff --git a/arch/um/include/asm/hardirq.h b/arch/um/include/asm/hardirq.h
index 52e2c36267a9..8de71752a9b8 100644
--- a/arch/um/include/asm/hardirq.h
+++ b/arch/um/include/asm/hardirq.h
@@ -2,8 +2,30 @@
#ifndef __ASM_UM_HARDIRQ_H
#define __ASM_UM_HARDIRQ_H
-#include <asm-generic/hardirq.h>
+#include <linux/cache.h>
+#include <linux/threads.h>
#define __ARCH_IRQ_EXIT_IRQS_DISABLED 1
+typedef struct {
+ unsigned int __softirq_pending;
+#if IS_ENABLED(CONFIG_SMP)
+ unsigned int irq_resched_count;
+ unsigned int irq_call_count;
+#endif
+} ____cacheline_aligned irq_cpustat_t;
+
+DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
+
+#define __ARCH_IRQ_STAT
+
+#define inc_irq_stat(member) this_cpu_inc(irq_stat.member)
+
+#include <linux/irq.h>
+
+static inline void ack_bad_irq(unsigned int irq)
+{
+ pr_crit("unexpected IRQ trap at vector %02x\n", irq);
+}
+
#endif /* __ASM_UM_HARDIRQ_H */
diff --git a/arch/um/include/asm/irqflags.h b/arch/um/include/asm/irqflags.h
index 1e69ef5bc35e..31e49e0894c5 100644
--- a/arch/um/include/asm/irqflags.h
+++ b/arch/um/include/asm/irqflags.h
@@ -2,7 +2,7 @@
#ifndef __UM_IRQFLAGS_H
#define __UM_IRQFLAGS_H
-extern int signals_enabled;
+int um_get_signals(void);
int um_set_signals(int enable);
void block_signals(void);
void unblock_signals(void);
@@ -10,7 +10,7 @@ void unblock_signals(void);
#define arch_local_save_flags arch_local_save_flags
static inline unsigned long arch_local_save_flags(void)
{
- return signals_enabled;
+ return um_get_signals();
}
#define arch_local_irq_restore arch_local_irq_restore
diff --git a/arch/um/include/asm/kasan.h b/arch/um/include/asm/kasan.h
index b54a4e937fd1..81bcdc0f962e 100644
--- a/arch/um/include/asm/kasan.h
+++ b/arch/um/include/asm/kasan.h
@@ -24,10 +24,6 @@
#ifdef CONFIG_KASAN
void kasan_init(void);
-
-#if defined(CONFIG_STATIC_LINK) && defined(CONFIG_KASAN_INLINE)
-#error UML does not work in KASAN_INLINE mode with STATIC_LINK enabled!
-#endif
#else
static inline void kasan_init(void) { }
#endif /* CONFIG_KASAN */
diff --git a/arch/um/include/asm/mmu.h b/arch/um/include/asm/mmu.h
index 4d0e4239f3cc..07d48738b402 100644
--- a/arch/um/include/asm/mmu.h
+++ b/arch/um/include/asm/mmu.h
@@ -7,16 +7,26 @@
#define __ARCH_UM_MMU_H
#include "linux/types.h"
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
#include <mm_id.h>
typedef struct mm_context {
struct mm_id id;
+ struct mutex turnstile;
struct list_head list;
/* Address range in need of a TLB sync */
+ spinlock_t sync_tlb_lock;
unsigned long sync_tlb_range_from;
unsigned long sync_tlb_range_to;
} mm_context_t;
+#define INIT_MM_CONTEXT(mm) \
+ .context = { \
+ .turnstile = __MUTEX_INITIALIZER(mm.context.turnstile), \
+ .sync_tlb_lock = __SPIN_LOCK_INITIALIZER(mm.context.sync_tlb_lock), \
+ }
+
#endif
diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h
index 6f54254aaf44..2d363460d896 100644
--- a/arch/um/include/asm/page.h
+++ b/arch/um/include/asm/page.h
@@ -96,8 +96,4 @@ extern unsigned long uml_physmem;
#endif /* __ASSEMBLER__ */
-#ifdef CONFIG_X86_32
-#define __HAVE_ARCH_GATE_AREA 1
-#endif
-
#endif /* __UM_PAGE_H */
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 24fdea6f88c3..3b42b0f45bf6 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -45,10 +45,12 @@ extern unsigned long *empty_zero_page;
* area for the same reason. ;)
*/
-extern unsigned long end_iomem;
+#ifndef COMPILE_OFFSETS
+#include <as-layout.h> /* for high_physmem */
+#endif
#define VMALLOC_OFFSET (__va_space)
-#define VMALLOC_START ((end_iomem + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
+#define VMALLOC_START ((high_physmem + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (TASK_SIZE-2*PAGE_SIZE)
#define MODULES_VADDR VMALLOC_START
#define MODULES_END VMALLOC_END
@@ -225,6 +227,8 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval)
static inline void um_tlb_mark_sync(struct mm_struct *mm, unsigned long start,
unsigned long end)
{
+ guard(spinlock_irqsave)(&mm->context.sync_tlb_lock);
+
if (!mm->context.sync_tlb_range_to) {
mm->context.sync_tlb_range_from = start;
mm->context.sync_tlb_range_to = end;
diff --git a/arch/um/include/asm/smp.h b/arch/um/include/asm/smp.h
index a8cc1d46ddcb..be1743a6ff3c 100644
--- a/arch/um/include/asm/smp.h
+++ b/arch/um/include/asm/smp.h
@@ -2,6 +2,19 @@
#ifndef __UM_SMP_H
#define __UM_SMP_H
-#define hard_smp_processor_id() 0
+#if IS_ENABLED(CONFIG_SMP)
+
+#include <linux/cpumask.h>
+#include <shared/smp.h>
+
+#define raw_smp_processor_id() uml_curr_cpu()
+
+void arch_smp_send_reschedule(int cpu);
+
+void arch_send_call_function_single_ipi(int cpu);
+
+void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+
+#endif /* CONFIG_SMP */
#endif
diff --git a/arch/um/include/asm/uaccess.h b/arch/um/include/asm/uaccess.h
index 1c6e0ae41b0c..0df9ea4abda8 100644
--- a/arch/um/include/asm/uaccess.h
+++ b/arch/um/include/asm/uaccess.h
@@ -15,11 +15,6 @@
(((unsigned long) (addr) < TASK_SIZE) && \
(((unsigned long) (addr) + (size)) < TASK_SIZE))
-#define __access_ok_vsyscall(addr, size) \
- (((unsigned long) (addr) >= FIXADDR_USER_START) && \
- ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
- ((unsigned long) (addr) + (size) >= (unsigned long)(addr)))
-
#define __addr_range_nowrap(addr, size) \
((unsigned long) (addr) <= ((unsigned long) (addr) + (size)))
@@ -40,9 +35,7 @@ static inline int __access_ok(const void __user *ptr, unsigned long size);
static inline int __access_ok(const void __user *ptr, unsigned long size)
{
unsigned long addr = (unsigned long)ptr;
- return __addr_range_nowrap(addr, size) &&
- (__under_task_size(addr, size) ||
- __access_ok_vsyscall(addr, size));
+ return __addr_range_nowrap(addr, size) && __under_task_size(addr, size);
}
#define __get_kernel_nofault(dst, src, type, err_label) \
diff --git a/arch/um/include/linux/smp-internal.h b/arch/um/include/linux/smp-internal.h
new file mode 100644
index 000000000000..1dbcbc23f9c9
--- /dev/null
+++ b/arch/um/include/linux/smp-internal.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __UM_SMP_INTERNAL_H
+#define __UM_SMP_INTERNAL_H
+
+#if IS_ENABLED(CONFIG_SMP)
+
+void prefill_possible_map(void);
+
+#else /* !CONFIG_SMP */
+
+static inline void prefill_possible_map(void) { }
+
+#endif /* CONFIG_SMP */
+
+extern char cpu_irqstacks[NR_CPUS][THREAD_SIZE] __aligned(THREAD_SIZE);
+
+#endif /* __UM_SMP_INTERNAL_H */
diff --git a/arch/um/include/linux/time-internal.h b/arch/um/include/linux/time-internal.h
index 138908b999d7..c274eb5ad55e 100644
--- a/arch/um/include/linux/time-internal.h
+++ b/arch/um/include/linux/time-internal.h
@@ -90,4 +90,7 @@ extern unsigned long tt_extra_sched_jiffies;
* which is intentional since we really shouldn't link it in that case.
*/
void time_travel_ndelay(unsigned long nsec);
+
+int um_setup_timer(void);
+
#endif /* __TIMER_INTERNAL_H__ */
diff --git a/arch/um/include/shared/as-layout.h b/arch/um/include/shared/as-layout.h
index 7c7e17bce403..02ef258e3395 100644
--- a/arch/um/include/shared/as-layout.h
+++ b/arch/um/include/shared/as-layout.h
@@ -44,7 +44,6 @@ extern unsigned long start_vm;
extern unsigned long brk_start;
-extern unsigned long host_task_size;
extern unsigned long stub_start;
extern int linux_main(int argc, char **argv, char **envp);
diff --git a/arch/um/include/shared/common-offsets.h b/arch/um/include/shared/common-offsets.h
deleted file mode 100644
index 8ca66a1918c3..000000000000
--- a/arch/um/include/shared/common-offsets.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* for use by sys-$SUBARCH/kernel-offsets.c */
-
-DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
-
-DEFINE(UM_KERN_PAGE_SIZE, PAGE_SIZE);
-DEFINE(UM_KERN_PAGE_MASK, PAGE_MASK);
-DEFINE(UM_KERN_PAGE_SHIFT, PAGE_SHIFT);
-
-DEFINE(UM_GFP_KERNEL, GFP_KERNEL);
-DEFINE(UM_GFP_ATOMIC, GFP_ATOMIC);
-
-DEFINE(UM_THREAD_SIZE, THREAD_SIZE);
-
-DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
-DEFINE(UM_NSEC_PER_USEC, NSEC_PER_USEC);
-
-DEFINE(UM_KERN_GDT_ENTRY_TLS_ENTRIES, GDT_ENTRY_TLS_ENTRIES);
-
-DEFINE(UM_SECCOMP_ARCH_NATIVE, SECCOMP_ARCH_NATIVE);
diff --git a/arch/um/include/shared/kern_util.h b/arch/um/include/shared/kern_util.h
index 00ca3e12fd9a..38321188c04c 100644
--- a/arch/um/include/shared/kern_util.h
+++ b/arch/um/include/shared/kern_util.h
@@ -15,9 +15,6 @@ extern int uml_exitcode;
extern int kmalloc_ok;
-#define UML_ROUND_UP(addr) \
- ((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK)
-
extern unsigned long alloc_stack(int order, int atomic);
extern void free_stack(unsigned long stack, int order);
@@ -42,7 +39,6 @@ extern void uml_pm_wake(void);
extern int start_uml(void);
extern void paging_init(void);
-extern int parse_iomem(char *str, int *add);
extern void uml_cleanup(void);
extern void do_uml_exitcalls(void);
@@ -55,6 +51,7 @@ extern int __uml_cant_sleep(void);
extern int get_current_pid(void);
extern int copy_from_user_proc(void *to, void *from, int size);
extern char *uml_strdup(const char *string);
+int uml_need_resched(void);
extern unsigned long to_irq_stack(unsigned long *mask_out);
extern unsigned long from_irq_stack(int nested);
diff --git a/arch/um/include/shared/longjmp.h b/arch/um/include/shared/longjmp.h
index 8863319039f3..c53e43d980c8 100644
--- a/arch/um/include/shared/longjmp.h
+++ b/arch/um/include/shared/longjmp.h
@@ -5,7 +5,6 @@
#include <sysdep/archsetjmp.h>
#include <os.h>
-extern int signals_enabled;
extern int setjmp(jmp_buf);
extern void longjmp(jmp_buf, int);
@@ -15,7 +14,7 @@ extern void longjmp(jmp_buf, int);
#define UML_SETJMP(buf) ({ \
int n, enable; \
- enable = *(volatile int *)&signals_enabled; \
+ enable = um_get_signals(); \
n = setjmp(*buf); \
if(n != 0) \
um_set_signals_trace(enable); \
diff --git a/arch/um/include/shared/mem_user.h b/arch/um/include/shared/mem_user.h
index d4727efcf23d..8a5b72872ff8 100644
--- a/arch/um/include/shared/mem_user.h
+++ b/arch/um/include/shared/mem_user.h
@@ -32,21 +32,8 @@
#ifndef _MEM_USER_H
#define _MEM_USER_H
-struct iomem_region {
- struct iomem_region *next;
- char *driver;
- int fd;
- int size;
- unsigned long phys;
- unsigned long virt;
-};
-
-extern struct iomem_region *iomem_regions;
-extern int iomem_size;
-
#define ROUND_4M(n) ((((unsigned long) (n)) + (1 << 22)) & ~((1 << 22) - 1))
-extern unsigned long find_iomem(char *driver, unsigned long *len_out);
extern void setup_physmem(unsigned long start, unsigned long usable,
unsigned long len);
extern void map_memory(unsigned long virt, unsigned long phys,
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h
index b35cc8ce333b..b26e94292fc1 100644
--- a/arch/um/include/shared/os.h
+++ b/arch/um/include/shared/os.h
@@ -216,6 +216,9 @@ extern int can_drop_memory(void);
void os_set_pdeathsig(void);
+int os_futex_wait(void *uaddr, unsigned int val);
+int os_futex_wake(void *uaddr);
+
/* execvp.c */
extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
/* helper.c */
@@ -243,6 +246,7 @@ extern void send_sigio_to_self(void);
extern int change_sig(int signal, int on);
extern void block_signals(void);
extern void unblock_signals(void);
+extern int um_get_signals(void);
extern int um_set_signals(int enable);
extern int um_set_signals_trace(int enable);
extern void deliver_alarm(void);
@@ -266,11 +270,12 @@ extern void os_warn(const char *fmt, ...)
__attribute__ ((format (printf, 1, 2)));
/* time.c */
+void os_idle_prepare(void);
extern void os_idle_sleep(void);
extern int os_timer_create(void);
-extern int os_timer_set_interval(unsigned long long nsecs);
-extern int os_timer_one_shot(unsigned long long nsecs);
-extern void os_timer_disable(void);
+extern int os_timer_set_interval(int cpu, unsigned long long nsecs);
+extern int os_timer_one_shot(int cpu, unsigned long long nsecs);
+extern void os_timer_disable(int cpu);
extern long long os_persistent_clock_emulation(void);
extern long long os_nsecs(void);
@@ -338,4 +343,17 @@ extern void um_trace_signals_off(void);
/* time-travel */
extern void deliver_time_travel_irqs(void);
+/* smp.c */
+#if IS_ENABLED(CONFIG_SMP)
+void os_init_smp(void);
+int os_start_cpu_thread(int cpu);
+void os_start_secondary(void *arg, jmp_buf *switch_buf);
+int os_send_ipi(int cpu, int vector);
+void os_local_ipi_enable(void);
+void os_local_ipi_disable(void);
+#else /* !CONFIG_SMP */
+static inline void os_local_ipi_enable(void) { }
+static inline void os_local_ipi_disable(void) { }
+#endif /* CONFIG_SMP */
+
#endif
diff --git a/arch/um/include/shared/skas/mm_id.h b/arch/um/include/shared/skas/mm_id.h
index 4f977ef5dda5..fb96c0bd8222 100644
--- a/arch/um/include/shared/skas/mm_id.h
+++ b/arch/um/include/shared/skas/mm_id.h
@@ -6,6 +6,8 @@
#ifndef __MM_ID_H
#define __MM_ID_H
+#include <linux/compiler_types.h>
+
#define STUB_MAX_FDS 4
struct mm_id {
@@ -19,6 +21,9 @@ struct mm_id {
int syscall_fd_map[STUB_MAX_FDS];
};
+void enter_turnstile(struct mm_id *mm_id) __acquires(turnstile);
+void exit_turnstile(struct mm_id *mm_id) __releases(turnstile);
+
void notify_mm_kill(int pid);
#endif
diff --git a/arch/um/include/shared/skas/skas.h b/arch/um/include/shared/skas/skas.h
index 807514e10538..2237ffedec75 100644
--- a/arch/um/include/shared/skas/skas.h
+++ b/arch/um/include/shared/skas/skas.h
@@ -15,5 +15,7 @@ extern void handle_syscall(struct uml_pt_regs *regs);
extern unsigned long current_stub_stack(void);
extern struct mm_id *current_mm_id(void);
extern void current_mm_sync(void);
+void initial_jmpbuf_lock(void);
+void initial_jmpbuf_unlock(void);
#endif
diff --git a/arch/um/include/shared/smp.h b/arch/um/include/shared/smp.h
new file mode 100644
index 000000000000..06e3faa95091
--- /dev/null
+++ b/arch/um/include/shared/smp.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __UM_SHARED_SMP_H
+#define __UM_SHARED_SMP_H
+
+#if IS_ENABLED(CONFIG_SMP)
+
+extern int uml_ncpus;
+
+int uml_curr_cpu(void);
+void uml_start_secondary(void *opaque);
+void uml_ipi_handler(int vector);
+
+#else /* !CONFIG_SMP */
+
+#define uml_ncpus 1
+#define uml_curr_cpu() 0
+
+#endif /* CONFIG_SMP */
+
+#endif /* __UM_SHARED_SMP_H */
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-06 11:29:09 +0000