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From: guoren@kernel.org
To: arnd@arndb.de, guoren@kernel.org, palmer@rivosinc.com,
	tglx@linutronix.de, peterz@infradead.org, luto@kernel.org,
	conor.dooley@microchip.com, heiko@sntech.de, jszhang@kernel.org,
	lazyparser@gmail.com, falcon@tinylab.org, chenhuacai@kernel.org,
	apatel@ventanamicro.com, atishp@atishpatra.org,
	palmer@dabbelt.com, paul.walmsley@sifive.com,
	mark.rutland@arm.com, zouyipeng@huawei.com,
	bigeasy@linutronix.de, David.Laight@aculab.com,
	chenzhongjin@huawei.com, greentime.hu@sifive.com,
	andy.chiu@sifive.com, ben@decadent.org.uk
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org,
	Lai Jiangshan <laijs@linux.alibaba.com>,
	Borislav Petkov <bp@alien8.de>, Miguel Ojeda <ojeda@kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Nick Desaulniers <ndesaulniers@google.com>
Subject: [PATCH -next V9 01/14] compiler_types.h: Add __noinstr_section() for noinstr
Date: Tue, 29 Nov 2022 22:40:46 -0500	[thread overview]
Message-ID: <20221130034059.826599-2-guoren@kernel.org> (raw)
In-Reply-To: <20221130034059.826599-1-guoren@kernel.org>

From: Lai Jiangshan <laijs@linux.alibaba.com>

And it will be extended for C entry code.

Cc: Borislav Petkov <bp@alien8.de>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Tested-by: Jisheng Zhang <jszhang@kernel.org>
Tested-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
 include/linux/compiler_types.h | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index eb0466236661..41e4faa4cd95 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -230,12 +230,19 @@ struct ftrace_likely_data {
 #define __no_sanitize_or_inline __always_inline
 #endif
 
-/* Section for code which can't be instrumented at all */
-#define noinstr								\
-	noinline notrace __attribute((__section__(".noinstr.text")))	\
-	__no_kcsan __no_sanitize_address __no_profile __no_sanitize_coverage \
+/*
+ * Using __noinstr_section() doesn't automatically disable all instrumentations
+ * on the section.  Inhibition for some instrumentations requires extra code.
+ * I.E. KPROBES explicitly avoids instrumenting on .noinstr.text.
+ */
+#define __noinstr_section(section)				\
+	noinline notrace __section(section) __no_profile	\
+	__no_kcsan __no_sanitize_address __no_sanitize_coverage	\
 	__no_sanitize_memory
 
+/* Section for code which can't be instrumented at all */
+#define noinstr __noinstr_section(".noinstr.text")
+
 #endif /* __KERNEL__ */
 
 #endif /* __ASSEMBLY__ */
-- 
2.36.1


WARNING: multiple messages have this Message-ID (diff)
From: guoren@kernel.org
To: arnd@arndb.de, guoren@kernel.org, palmer@rivosinc.com,
	tglx@linutronix.de, peterz@infradead.org, luto@kernel.org,
	conor.dooley@microchip.com, heiko@sntech.de, jszhang@kernel.org,
	lazyparser@gmail.com, falcon@tinylab.org, chenhuacai@kernel.org,
	apatel@ventanamicro.com, atishp@atishpatra.org,
	palmer@dabbelt.com, paul.walmsley@sifive.com,
	mark.rutland@arm.com, zouyipeng@huawei.com,
	bigeasy@linutronix.de, David.Laight@aculab.com,
	chenzhongjin@huawei.com, greentime.hu@sifive.com,
	andy.chiu@sifive.com, ben@decadent.org.uk
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org,
	Lai Jiangshan <laijs@linux.alibaba.com>,
	Borislav Petkov <bp@alien8.de>, Miguel Ojeda <ojeda@kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Nick Desaulniers <ndesaulniers@google.com>
Subject: [PATCH -next V9 01/14] compiler_types.h: Add __noinstr_section() for noinstr
Date: Tue, 29 Nov 2022 22:40:46 -0500	[thread overview]
Message-ID: <20221130034059.826599-2-guoren@kernel.org> (raw)
In-Reply-To: <20221130034059.826599-1-guoren@kernel.org>

From: Lai Jiangshan <laijs@linux.alibaba.com>

And it will be extended for C entry code.

Cc: Borislav Petkov <bp@alien8.de>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Tested-by: Jisheng Zhang <jszhang@kernel.org>
Tested-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
 include/linux/compiler_types.h | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index eb0466236661..41e4faa4cd95 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -230,12 +230,19 @@ struct ftrace_likely_data {
 #define __no_sanitize_or_inline __always_inline
 #endif
 
-/* Section for code which can't be instrumented at all */
-#define noinstr								\
-	noinline notrace __attribute((__section__(".noinstr.text")))	\
-	__no_kcsan __no_sanitize_address __no_profile __no_sanitize_coverage \
+/*
+ * Using __noinstr_section() doesn't automatically disable all instrumentations
+ * on the section.  Inhibition for some instrumentations requires extra code.
+ * I.E. KPROBES explicitly avoids instrumenting on .noinstr.text.
+ */
+#define __noinstr_section(section)				\
+	noinline notrace __section(section) __no_profile	\
+	__no_kcsan __no_sanitize_address __no_sanitize_coverage	\
 	__no_sanitize_memory
 
+/* Section for code which can't be instrumented at all */
+#define noinstr __noinstr_section(".noinstr.text")
+
 #endif /* __KERNEL__ */
 
 #endif /* __ASSEMBLY__ */
-- 
2.36.1


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  reply	other threads:[~2022-11-30  3:42 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-30  3:40 [PATCH -next V9 00/14] riscv: Add GENERIC_ENTRY support and related features guoren
2022-11-30  3:40 ` guoren
2022-11-30  3:40 ` guoren [this message]
2022-11-30  3:40   ` [PATCH -next V9 01/14] compiler_types.h: Add __noinstr_section() for noinstr guoren
2022-11-30  3:40 ` [PATCH -next V9 02/14] riscv: elf_kexec: Fixup compile warning guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 03/14] riscv: compat_syscall_table: " guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 04/14] riscv: ptrace: Remove duplicate operation guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 05/14] riscv: traps: Add noinstr to prevent instrumentation inserted guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 06/14] riscv: convert to generic entry guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 07/14] riscv: Support HAVE_IRQ_EXIT_ON_IRQ_STACK guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 08/14] riscv: Support HAVE_SOFTIRQ_ON_OWN_STACK guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 09/14] riscv: Add config of thread stack size guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 10/14] riscv: Typo fixup for addi -> andi in comment guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 11/14] riscv: Add support for STACKLEAK gcc plugin guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 12/14] riscv: remove extra level wrappers of trace_hardirqs_{on,off} guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 13/14] riscv: consolidate ret_from_kernel_thread into ret_from_fork guoren
2022-11-30  3:40   ` guoren
2022-11-30  3:40 ` [PATCH -next V9 14/14] riscv: entry: consolidate general regs saving/restoring guoren
2022-11-30  3:40   ` guoren

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