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Fri, 24 Nov 2023 02:20:15 -0800 (PST) Date: Fri, 24 Nov 2023 11:18:41 +0100 In-Reply-To: <20231124101840.944737-41-ardb@google.com> Mime-Version: 1.0 References: <20231124101840.944737-41-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=owGbwMvMwCFmkMcZplerG8N4Wi2JITWholGz/t6RRQfkT01uV2N58XxegMrOTdOmX7MTSFV3b eLKqHHpKGVhEONgkBVTZBGY/ffdztMTpWqdZ8nCzGFlAhnCwMUpABPx+MrwV3DXwsbvHVVW86u0 26O2+Kzu6rPcvkxC7xGnVLnUiYNvGxn+yi72qPGq/JmzN9Xs0PGgOXdMJ1zVOT/7RWZ5t9vrB7s 2MQIA X-Mailer: git-send-email 2.43.0.rc1.413.gea7ed67945-goog Message-ID: <20231124101840.944737-42-ardb@google.com> Subject: [PATCH v5 01/39] 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-20231124_022019_848902_0346AEAF X-CRM114-Status: UNSURE ( 9.98 ) X-CRM114-Notice: Please train this message. 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: , 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 \