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| author | Alex Shi <alex.shi@linaro.org> | 2016-04-27 10:08:48 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2016-04-27 10:08:48 +0800 |
| commit | a79bee58f4fc3cc237fc86667edf2d0b9dce0173 (patch) | |
| tree | 7d1df3ba21a3de136cd0649caeec50f793133a03 /arch/x86/include/asm/kasan.h | |
| parent | ef59ba115fc76ea4c21030f49e31fe18e9055679 (diff) | |
| parent | e0ac66e00b01f6ff4e8274a4b5c008a26583c1b9 (diff) | |
Merge branch 'linux-linaro-lsk-v3.18' into linux-linaro-lsk-v3.18-androidlsk-v3.18-16.04-android
Conflicts:
arch/arm64/kernel/head.S
arch/arm64/mm/Makefile
Diffstat (limited to 'arch/x86/include/asm/kasan.h')
| -rw-r--r-- | arch/x86/include/asm/kasan.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kasan.h b/arch/x86/include/asm/kasan.h new file mode 100644 index 000000000000..491e4fd7754e --- /dev/null +++ b/arch/x86/include/asm/kasan.h @@ -0,0 +1,34 @@ +#ifndef _ASM_X86_KASAN_H +#define _ASM_X86_KASAN_H + +#include <linux/const.h> +#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) + +/* + * Compiler uses shadow offset assuming that addresses start + * from 0. Kernel addresses don't start from 0, so shadow + * for kernel really starts from compiler's shadow offset + + * 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT + */ +#define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET + \ + (0xffff800000000000ULL >> 3)) +/* 47 bits for kernel address -> (47 - 3) bits for shadow */ +#define KASAN_SHADOW_END (KASAN_SHADOW_START + (1ULL << (47 - 3))) + +#ifndef __ASSEMBLY__ + +extern pte_t kasan_zero_pte[]; +extern pte_t kasan_zero_pmd[]; +extern pte_t kasan_zero_pud[]; + +#ifdef CONFIG_KASAN +void __init kasan_map_early_shadow(pgd_t *pgd); +void __init kasan_init(void); +#else +static inline void kasan_map_early_shadow(pgd_t *pgd) { } +static inline void kasan_init(void) { } +#endif + +#endif + +#endif |