The patch titled
Subject: kasan, arm64: add arch_suppress_tag_checks_start/stop
has been added to the -mm mm-unstable branch. Its filename is
kasan-arm64-add-arch_suppress_tag_checks_start-stop.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-arm64-add-arch_suppress_tag_checks_start-stop.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan, arm64: add arch_suppress_tag_checks_start/stop
Date: Sat, 11 Mar 2023 00:43:32 +0100
Add two new tagging-related routines arch_suppress_tag_checks_start/stop
that suppress MTE tag checking via the TCO register.
These rouines are used in the next patch.
Link: https://lkml.kernel.org/r/75a362551c3c54b70ae59a3492cabb51c105fa6b.1678491668.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Evgenii Stepanov <eugenis@xxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Peter Collingbourne <pcc@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Weizhao Ouyang <ouyangweizhao@xxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/arch/arm64/include/asm/memory.h~kasan-arm64-add-arch_suppress_tag_checks_start-stop
+++ a/arch/arm64/include/asm/memory.h
@@ -264,6 +264,8 @@ static inline const void *__tag_set(cons
#define arch_enable_tag_checks_sync() mte_enable_kernel_sync()
#define arch_enable_tag_checks_async() mte_enable_kernel_async()
#define arch_enable_tag_checks_asymm() mte_enable_kernel_asymm()
+#define arch_suppress_tag_checks_start() __mte_enable_tco()
+#define arch_suppress_tag_checks_stop() __mte_disable_tco()
#define arch_force_async_tag_fault() mte_check_tfsr_exit()
#define arch_get_random_tag() mte_get_random_tag()
#define arch_get_mem_tag(addr) mte_get_mem_tag(addr)
--- a/mm/kasan/kasan.h~kasan-arm64-add-arch_suppress_tag_checks_start-stop
+++ a/mm/kasan/kasan.h
@@ -398,6 +398,8 @@ static inline const void *arch_kasan_set
#define hw_enable_tag_checks_sync() arch_enable_tag_checks_sync()
#define hw_enable_tag_checks_async() arch_enable_tag_checks_async()
#define hw_enable_tag_checks_asymm() arch_enable_tag_checks_asymm()
+#define hw_suppress_tag_checks_start() arch_suppress_tag_checks_start()
+#define hw_suppress_tag_checks_stop() arch_suppress_tag_checks_stop()
#define hw_force_async_tag_fault() arch_force_async_tag_fault()
#define hw_get_random_tag() arch_get_random_tag()
#define hw_get_mem_tag(addr) arch_get_mem_tag(addr)
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-drop-empty-tagging-related-defines.patch
kasan-arm64-rename-tagging-related-routines.patch
kasan-arm64-add-arch_suppress_tag_checks_start-stop.patch
kasan-suppress-recursive-reports-for-hw_tags.patch
kcov-improve-documentation.patch
kcov-improve-documentation-v2.patch
kcov-improve-documentation-v3.patch
