From: Linus Walleij <linus.walleij@linaro.org>
To: Russell King <linux@armlinux.org.uk>,
Sami Tolvanen <samitolvanen@google.com>,
Kees Cook <keescook@chromium.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Ard Biesheuvel <ardb@kernel.org>, Arnd Bergmann <arnd@arndb.de>
Cc: linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev,
Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH v8 9/9] ARM: Support CLANG CFI
Date: Tue, 23 Apr 2024 09:19:55 +0200 [thread overview]
Message-ID: <20240423-arm32-cfi-v8-9-08f10f5d9297@linaro.org> (raw)
In-Reply-To: <20240423-arm32-cfi-v8-0-08f10f5d9297@linaro.org>
Support Control Flow Integrity (CFI) when compiling with
CLANG.
In the as-of-writing LLVM CLANG implementation (v17)
the 32-bit ARM platform is supported by the generic CFI
implementation, which isn't tailored specifically for ARM32
but works well enough to enable the feature.
Tested-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
arch/arm/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b14aed3a17ab..df7bd07ad0d4 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -35,6 +35,7 @@ config ARM
select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT if CPU_V7
select ARCH_SUPPORTS_ATOMIC_RMW
+ select ARCH_SUPPORTS_CFI_CLANG
select ARCH_SUPPORTS_HUGETLBFS if ARM_LPAE
select ARCH_SUPPORTS_PER_VMA_LOCK
select ARCH_USE_BUILTIN_BSWAP
--
2.44.0
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next prev parent reply other threads:[~2024-04-23 7:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-23 7:19 [PATCH v8 0/9] CFI for ARM32 using LLVM Linus Walleij
2024-04-23 7:19 ` [PATCH v8 1/9] ARM: mm: Make tlbflush routines CFI safe Linus Walleij
2024-04-23 7:19 ` [PATCH v8 3/9] ARM: mm: Use symbol alias for two cache functions Linus Walleij
2024-04-23 7:19 ` [PATCH v8 4/9] ARM: mm: Rewrite cacheflush vtables in CFI safe C Linus Walleij
2024-04-23 7:19 ` [PATCH v8 5/9] ARM: mm: Type-annotate all per-processor assembly routines Linus Walleij
2024-04-23 7:19 ` [PATCH v8 6/9] ARM: mm: Define prototypes for all per-processor calls Linus Walleij
2024-04-23 7:19 ` [PATCH v8 7/9] ARM: lib: Annotate loop delay instructions for CFI Linus Walleij
2024-04-23 7:19 ` [PATCH v8 8/9] ARM: hw_breakpoint: Handle CFI breakpoints Linus Walleij
2024-04-23 7:19 ` Linus Walleij [this message]
2024-04-29 13:21 ` [PATCH v8 0/9] CFI for ARM32 using LLVM Russell King (Oracle)
2024-04-29 14:54 ` Ard Biesheuvel
2024-04-29 15:06 ` Sami Tolvanen
2024-04-30 7:43 ` Linus Walleij
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