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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 4/5] kasan, arm64: add arch_suppress_tag_checks_start/stop
Date: Sat, 11 Mar 2023 00:43:32 +0100	[thread overview]
Message-ID: <75a362551c3c54b70ae59a3492cabb51c105fa6b.1678491668.git.andreyknvl@google.com> (raw)
In-Reply-To: <bc919c144f8684a7fd9ba70c356ac2a75e775e29.1678491668.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..26bd4d9aa401 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


WARNING: multiple messages have this Message-ID (diff)
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 4/5] kasan, arm64: add arch_suppress_tag_checks_start/stop
Date: Sat, 11 Mar 2023 00:43:32 +0100	[thread overview]
Message-ID: <75a362551c3c54b70ae59a3492cabb51c105fa6b.1678491668.git.andreyknvl@google.com> (raw)
In-Reply-To: <bc919c144f8684a7fd9ba70c356ac2a75e775e29.1678491668.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..26bd4d9aa401 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


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  parent reply	other threads:[~2023-03-10 23:43 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-10 23:43 [PATCH 1/5] kasan: drop empty tagging-related defines andrey.konovalov
2023-03-10 23:43 ` andrey.konovalov
2023-03-10 23:43 ` [PATCH 2/5] kasan, arm64: rename tagging-related routines andrey.konovalov
2023-03-10 23:43   ` andrey.konovalov
2023-03-10 23:43 ` [PATCH 3/5] arm64: mte: Rename TCO routines andrey.konovalov
2023-03-10 23:43   ` andrey.konovalov
2023-03-10 23:43 ` andrey.konovalov [this message]
2023-03-10 23:43   ` [PATCH 4/5] kasan, arm64: add arch_suppress_tag_checks_start/stop andrey.konovalov
2023-03-10 23:43 ` [PATCH 5/5] kasan: suppress recursive reports for HW_TAGS andrey.konovalov
2023-03-10 23:43   ` andrey.konovalov
2023-03-13 11:19   ` Marco Elver
2023-03-13 11:19     ` Marco Elver
2023-03-14 17:56     ` Andrey Konovalov
2023-03-14 17:56       ` Andrey Konovalov

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