From: andrey.konovalov@linux.dev
To: Marco Elver <elver@google.com>,
Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
kasan-dev@googlegroups.com,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Peter Collingbourne <pcc@google.com>,
Evgenii Stepanov <eugenis@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Weizhao Ouyang <ouyangweizhao@zeku.com>,
linux-kernel@vger.kernel.org,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH v2 4/5] kasan, arm64: add arch_suppress_tag_checks_start/stop
Date: Wed, 29 Mar 2023 20:37:47 +0200 [thread overview]
Message-ID: <7ad5e5a9db79e3aba08d8f43aca24350b04080f6.1680114854.git.andreyknvl@google.com> (raw)
In-Reply-To: <dc432429a6d87f197eefb179f26012c6c1ec6cd9.1680114854.git.andreyknvl@google.com>
From: Andrey Konovalov <andreyknvl@google.com>
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.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
arch/arm64/include/asm/memory.h | 2 ++
mm/kasan/kasan.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index faf42bff9a60..05e42bd3555f 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -264,6 +264,8 @@ static inline const void *__tag_set(const void *addr, u8 tag)
#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)
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index a1613f5d7608..f5e4f5f2ba20 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -398,6 +398,8 @@ static inline const void *arch_kasan_set_tag(const void *addr, u8 tag)
#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)
--
2.25.1
next prev parent reply other threads:[~2023-03-29 18:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-29 18:37 [PATCH v2 1/5] kasan: drop empty tagging-related defines andrey.konovalov
2023-03-29 18:37 ` [PATCH v2 2/5] kasan, arm64: rename tagging-related routines andrey.konovalov
2023-03-29 18:37 ` [PATCH v2 3/5] arm64: mte: Rename TCO routines andrey.konovalov
2023-03-29 18:41 ` Andrey Konovalov
2023-03-29 18:37 ` andrey.konovalov [this message]
2023-03-29 18:37 ` [PATCH v2 5/5] kasan: suppress recursive reports for HW_TAGS andrey.konovalov
2023-03-30 7:06 ` Marco Elver
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