linux/arch/arm64/lib
Andrey Konovalov 2cb3427642 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>
2021-02-26 09:41:03 -08:00
..
clear_page.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
clear_user.S arm64: uaccess cleanup macro naming 2020-12-02 19:49:11 +00:00
copy_from_user.S arm64: uaccess cleanup macro naming 2020-12-02 19:49:11 +00:00
copy_in_user.S arm64: uaccess cleanup macro naming 2020-12-02 19:49:11 +00:00
copy_page.S Merge branch 'for-next/asm-annotations' into for-next/core 2020-01-22 11:34:21 +00:00
copy_template.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
copy_to_user.S arm64: uaccess cleanup macro naming 2020-12-02 19:49:11 +00:00
crc32.S arm64: lib: Consistently enable crc32 extension 2020-04-28 14:36:32 +01:00
csum.c arm64: csum: Disable KASAN for do_csum() 2020-04-15 21:36:41 +01:00
delay.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
error-inject.c arm64: Add support for function error injection 2019-08-07 13:53:09 +01:00
Makefile arm64: mte: Clear the tags when a page is mapped in user-space with PROT_MTE 2020-09-04 12:46:06 +01:00
memchr.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
memcmp.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
memcpy.S arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S 2020-10-30 08:32:31 +00:00
memmove.S arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S 2020-10-30 08:32:31 +00:00
memset.S arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S 2020-10-30 08:32:31 +00:00
mte.S arm64: kasan: simplify and inline MTE functions 2021-02-26 09:41:03 -08:00
strchr.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
strcmp.S arm64: fix spelling mistake "ca not" -> "cannot" 2020-03-17 18:22:40 +00:00
strlen.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
strncmp.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
strnlen.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
strrchr.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
tishift.S arm64: lib: Use modern annotations for assembly functions 2020-01-08 12:23:02 +00:00
uaccess_flushcache.c arm64: uaccess: simplify __copy_user_flushcache() 2020-12-02 19:49:10 +00:00
xor-neon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00