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| author | Andrey Konovalov <andreyknvl@google.com> | 2018-12-28 09:30:16 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 21:11:43 +0100 |
| commit | 3c9e3aa11094e821aff4a8f6812a6e032293dbc0 (patch) | |
| tree | 6d4b0baeb13a2f51dc3b5dd2019b0133b0456ca2 /arch/arm64/include/asm/kasan.h | |
| parent | arm64: move untagged_addr macro from uaccess.h to memory.h (diff) | |
| download | linux-3c9e3aa11094e821aff4a8f6812a6e032293dbc0.tar.xz linux-3c9e3aa11094e821aff4a8f6812a6e032293dbc0.zip | |
kasan: add tag related helper functions
This commit adds a few helper functions, that are meant to be used to work
with tags embedded in the top byte of kernel pointers: to set, to get or
to reset the top byte.
Link: http://lkml.kernel.org/r/f6c6437bb8e143bc44f42c3c259c62e734be7935.1544099024.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm64/include/asm/kasan.h')
| -rw-r--r-- | arch/arm64/include/asm/kasan.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/kasan.h b/arch/arm64/include/asm/kasan.h index 8758bb008436..b52aacd2c526 100644 --- a/arch/arm64/include/asm/kasan.h +++ b/arch/arm64/include/asm/kasan.h @@ -4,12 +4,16 @@ #ifndef __ASSEMBLY__ -#ifdef CONFIG_KASAN - #include <linux/linkage.h> #include <asm/memory.h> #include <asm/pgtable-types.h> +#define arch_kasan_set_tag(addr, tag) __tag_set(addr, tag) +#define arch_kasan_reset_tag(addr) __tag_reset(addr) +#define arch_kasan_get_tag(addr) __tag_get(addr) + +#ifdef CONFIG_KASAN + /* * KASAN_SHADOW_START: beginning of the kernel virtual addresses. * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/N of kernel virtual addresses, |