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Wed, 29 Nov 2023 03:17:16 -0800 (PST) Date: Wed, 29 Nov 2023 12:15:57 +0100 In-Reply-To: <20231129111555.3594833-43-ardb@google.com> Mime-Version: 1.0 References: <20231129111555.3594833-43-ardb@google.com> X-Developer-Key: i=ardb@kernel.org; a=openpgp; fpr=F43D03328115A198C90016883D200E9CA6329909 X-Developer-Signature: v=1; a=openpgp-sha256; l=1050; i=ardb@kernel.org; h=from:subject; bh=Q52rjgTf5a2iluAi5473JQmjpRUrpaaPVzn/tdZq3BE=; b=owGbwMvMwCFmkMcZplerG8N4Wi2JITVdNlez/t6RRQfkT01uV2N58XxegMrOTdOmX7MTSFV3b eLKqHHpKGVhEONgkBVTZBGY/ffdztMTpWqdZ8nCzGFlAhnCwMUpABM59ZaRoe/wlUulN9czLjZS 4wrZaHv19fdf+k++3IxVC4vnWz5puRLD//CN7bELcl7KlrGH/LkkPyV/q6yfA1ewyzuvU/srQ5e s4gIA X-Mailer: git-send-email 2.43.0.rc1.413.gea7ed67945-goog Message-ID: <20231129111555.3594833-44-ardb@google.com> Subject: [PATCH v6 01/41] arm64: kernel: Disable latent_entropy GCC plugin in early C runtime From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Cc: Ard Biesheuvel , Catalin Marinas , Will Deacon , Marc Zyngier , Mark Rutland , Ryan Roberts , Anshuman Khandual , Kees Cook X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231129_031720_265611_711692A3 X-CRM114-Status: GOOD ( 10.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Ard Biesheuvel In subsequent patches, mark portions of the early C code will be marked as __init. Unfortunarely, __init implies __latent_entropy, and this would result in the early C code being instrumented in an unsafe manner. Disable the latent entropy plugin for the early C code. Acked-by: Mark Rutland Signed-off-by: Ard Biesheuvel --- arch/arm64/kernel/pi/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/pi/Makefile b/arch/arm64/kernel/pi/Makefile index 4c0ea3cd4ea4..c844a0546d7f 100644 --- a/arch/arm64/kernel/pi/Makefile +++ b/arch/arm64/kernel/pi/Makefile @@ -3,6 +3,7 @@ KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie \ -Os -DDISABLE_BRANCH_PROFILING $(DISABLE_STACKLEAK_PLUGIN) \ + $(DISABLE_LATENT_ENTROPY_PLUGIN) \ $(call cc-option,-mbranch-protection=none) \ -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \ -include $(srctree)/include/linux/hidden.h \ -- 2.43.0.rc1.413.gea7ed67945-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel