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| author | Andrey Konovalov <andreyknvl@google.com> | 2021-02-26 02:20:31 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-26 18:41:03 +0100 |
| commit | 2cb34276427a093e2d7cc6ea63ac447bad1ff4c1 (patch) | |
| tree | 0c3fb40586ab34827c06710f8c3ec769fcbb01a5 /arch/arm64/include/asm/cache.h | |
| parent | kasan: ensure poisoning size alignment (diff) | |
| download | linux-2cb34276427a093e2d7cc6ea63ac447bad1ff4c1.tar.xz linux-2cb34276427a093e2d7cc6ea63ac447bad1ff4c1.zip | |
arm64: kasan: simplify and inline MTE functions
This change provides a simpler implementation of mte_get_mem_tag(),
mte_get_random_tag(), and mte_set_mem_tag_range().
Simplifications include removing system_supports_mte() checks as these
functions are onlye called from KASAN runtime that had already checked
system_supports_mte(). Besides that, size and address alignment checks
are removed from mte_set_mem_tag_range(), as KASAN now does those.
This change also moves these functions into the asm/mte-kasan.h header and
implements mte_set_mem_tag_range() via inline assembly to avoid
unnecessary functions calls.
[vincenzo.frascino@arm.com: fix warning in mte_get_random_tag()]
Link: https://lkml.kernel.org/r/20210211152208.23811-1-vincenzo.frascino@arm.com
Link: https://lkml.kernel.org/r/a26121b294fdf76e369cb7a74351d1c03a908930.1612546384.git.andreyknvl@google.com
Co-developed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Marco Elver <elver@google.com>
Cc: Peter Collingbourne <pcc@google.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/cache.h')
| -rw-r--r-- | arch/arm64/include/asm/cache.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h index 77cbbe3625f2..a074459f8f2f 100644 --- a/arch/arm64/include/asm/cache.h +++ b/arch/arm64/include/asm/cache.h @@ -6,7 +6,6 @@ #define __ASM_CACHE_H #include <asm/cputype.h> -#include <asm/mte-kasan.h> #define CTR_L1IP_SHIFT 14 #define CTR_L1IP_MASK 3 |