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author | Andrey Konovalov <andreyknvl@google.com> | 2021-02-25 17:20:31 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-26 09:41:03 -0800 |
commit | 2cb34276427a093e2d7cc6ea63ac447bad1ff4c1 (patch) | |
tree | 0c3fb40586ab34827c06710f8c3ec769fcbb01a5 /mm | |
parent | cde8a7eb778c7c71f70d636aa0bb1ec081b9167c (diff) | |
download | linux-2cb34276427a093e2d7cc6ea63ac447bad1ff4c1.tar.gz linux-2cb34276427a093e2d7cc6ea63ac447bad1ff4c1.tar.bz2 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 'mm')
0 files changed, 0 insertions, 0 deletions