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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=B4VLNzxMuvBiHcofU7yya6+NRz/joAG8uuuPQJlxTTo=; b=KcF+1qWJvdIPDzpAnJCK+a5DkbEO+GxuOHfuNBnjMvfiKMa/eIOmBklyB84+mjcZHk eD2QTpIYE0xF7919yGU+RjiNGZsw9ncup0U8I72UF1pQN5XXjVwM/M5w4bAdFazQq6Sh pPaxVG/t6Yek2P9iWbX1C2akoFYaaL88TEdYBVAszHwW6d5iXI+c8x9HQRK3pnZFuera ugqWcXmaKSN5MUy+F/oQQQm0QviLfCVuL+ETSlsHtx74NNG5EINHxNRTocLC87LOzuy6 e15wQzhJ4bdU5+Widbq6/IM4sMp83hlyP3B6aP77sl/5XKDUWrxPgHMhTVtwiBxbCp/+ v27A== X-Gm-Message-State: APjAAAWB0AYA599JWttZgONTgSJt9YwV4QA+Fg1/hfUBGzxyragH1uSP 77UfEB9q/VGXlXLkdra/0yNYX6hRmZsCS/8dYAY= X-Google-Smtp-Source: APXvYqwoggK1YVUJpQXUwc7FiBvv7A/DJq1W/EwQk4BCJ6LoqoLRq9NRXAmJ6C3gzBh1eCK8VeecRlAeD8DpBndQofs= X-Received: by 2002:ac8:22c4:: with SMTP id g4mr5716668qta.45.1572540432881; Thu, 31 Oct 2019 09:47:12 -0700 (PDT) Date: Thu, 31 Oct 2019 09:46:31 -0700 In-Reply-To: <20191031164637.48901-1-samitolvanen@google.com> Message-Id: <20191031164637.48901-12-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191031164637.48901-1-samitolvanen@google.com> X-Mailer: git-send-email 2.24.0.rc0.303.g954a862665-goog Subject: [PATCH v3 11/17] arm64: disable function graph tracing with SCS From: samitolvanen@google.com To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191031_094715_672867_59DE19E0 X-CRM114-Status: GOOD ( 10.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Kees Cook , Jann Horn , Masahiro Yamada , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, Miguel Ojeda , clang-built-linux@googlegroups.com, Sami Tolvanen , Laura Abbott , Dave Martin , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Archived-At: List-Archive: With CONFIG_FUNCTION_GRAPH_TRACER, function return addresses are modified in ftrace_graph_caller and prepare_ftrace_return to redirect control flow to ftrace_return_to_handler. This is incompatible with SCS. Signed-off-by: Sami Tolvanen --- arch/arm64/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index e7b57a8a5531..42867174920f 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -148,7 +148,7 @@ config ARM64 select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_ERROR_INJECTION - select HAVE_FUNCTION_GRAPH_TRACER + select HAVE_FUNCTION_GRAPH_TRACER if !SHADOW_CALL_STACK select HAVE_GCC_PLUGINS select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_IRQ_TIME_ACCOUNTING -- 2.24.0.rc0.303.g954a862665-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel