mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 04:46:32 +07:00
92b0729c34
Make use of the EXTABLE_FAULT exception table entries to write a kernel copy routine that doesn't crash the system if it encounters a machine check. Prime use case for this is to copy from large arrays of non-volatile memory used as storage. We have to use an unrolled copy loop for now because current hardware implementations treat a machine check in "rep mov" as fatal. When that is fixed we can simplify. Return type is a "bool". True means that we copied OK, false means that it didn't. Signed-off-by: Tony Luck <tony.luck@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@gmail.com> Link: http://lkml.kernel.org/r/a44e1055efc2d2a9473307b22c91caa437aa3f8b.1456439214.git.tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/* Exports for assembly files.
|
|
All C exports should go in the respective C files. */
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <net/checksum.h>
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/desc.h>
|
|
#include <asm/ftrace.h>
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
/* mcount and __fentry__ are defined in assembly */
|
|
#ifdef CC_USING_FENTRY
|
|
EXPORT_SYMBOL(__fentry__);
|
|
#else
|
|
EXPORT_SYMBOL(mcount);
|
|
#endif
|
|
#endif
|
|
|
|
EXPORT_SYMBOL(__get_user_1);
|
|
EXPORT_SYMBOL(__get_user_2);
|
|
EXPORT_SYMBOL(__get_user_4);
|
|
EXPORT_SYMBOL(__get_user_8);
|
|
EXPORT_SYMBOL(__put_user_1);
|
|
EXPORT_SYMBOL(__put_user_2);
|
|
EXPORT_SYMBOL(__put_user_4);
|
|
EXPORT_SYMBOL(__put_user_8);
|
|
|
|
EXPORT_SYMBOL(copy_user_generic_string);
|
|
EXPORT_SYMBOL(copy_user_generic_unrolled);
|
|
EXPORT_SYMBOL(copy_user_enhanced_fast_string);
|
|
EXPORT_SYMBOL(__copy_user_nocache);
|
|
EXPORT_SYMBOL(_copy_from_user);
|
|
EXPORT_SYMBOL(_copy_to_user);
|
|
|
|
EXPORT_SYMBOL_GPL(memcpy_mcsafe);
|
|
|
|
EXPORT_SYMBOL(copy_page);
|
|
EXPORT_SYMBOL(clear_page);
|
|
|
|
EXPORT_SYMBOL(csum_partial);
|
|
|
|
/*
|
|
* Export string functions. We normally rely on gcc builtin for most of these,
|
|
* but gcc sometimes decides not to inline them.
|
|
*/
|
|
#undef memcpy
|
|
#undef memset
|
|
#undef memmove
|
|
|
|
extern void *__memset(void *, int, __kernel_size_t);
|
|
extern void *__memcpy(void *, const void *, __kernel_size_t);
|
|
extern void *__memmove(void *, const void *, __kernel_size_t);
|
|
extern void *memset(void *, int, __kernel_size_t);
|
|
extern void *memcpy(void *, const void *, __kernel_size_t);
|
|
extern void *memmove(void *, const void *, __kernel_size_t);
|
|
|
|
EXPORT_SYMBOL(__memset);
|
|
EXPORT_SYMBOL(__memcpy);
|
|
EXPORT_SYMBOL(__memmove);
|
|
|
|
EXPORT_SYMBOL(memset);
|
|
EXPORT_SYMBOL(memcpy);
|
|
EXPORT_SYMBOL(memmove);
|
|
|
|
#ifndef CONFIG_DEBUG_VIRTUAL
|
|
EXPORT_SYMBOL(phys_base);
|
|
#endif
|
|
EXPORT_SYMBOL(empty_zero_page);
|
|
#ifndef CONFIG_PARAVIRT
|
|
EXPORT_SYMBOL(native_load_gs_index);
|
|
#endif
|
|
|
|
#ifdef CONFIG_PREEMPT
|
|
EXPORT_SYMBOL(___preempt_schedule);
|
|
EXPORT_SYMBOL(___preempt_schedule_notrace);
|
|
#endif
|