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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=SV1DVkULqNa+FuGbiBRMBHT4OnEsBDpzGAv6cWsD5ng=; b=g6L2aZFq/LBDaUzPQQcv4JkLOWimijB9VSNs3J5DXmoEuGbpgXH/C81j2nVljkeWym AQte4GTVRPi0PN8FGKazP6F1O4n5Xcv+G0o78+aa06R4xvn2orjsX7rROYHQi3cmn/rz lOUy9gzWJE184GVKvznYLlQ6hrLEzUPohsYxvcKmd4xp3DbYCOZ3xY7G09P9A9TWq6og kZWy5ZLRGkpadGHnSdlJxEw861RA6FsZ22lTHdgD2W2VgnnR5pwuOSTSabPBiBbxH5Sl LDlprikAxkFYLL8ifCOzXDv7+ao6TyhB5mT4AGBQRNVU18GbVf0FCRhU5fiwix3sdSCa IBbA== X-Gm-Message-State: AGi0PuaQfRNk1AMHRJxcPmuJTiaf6o5Q++bYlauRhtQrmulLln3AvV9J KiyVLyJi1HodYvi82HFP5p9zsbNfim/tZ1FpgMM= X-Google-Smtp-Source: APiQypJNkpQBGKyIWPV2BtmwX/E/gHMUX9jAQmns+9eOAcaQtZAXVp0Bz90VtPtI2vifzdaZP44LMcdHl+FTfzmDINE= X-Received: by 2002:a63:ca41:: with SMTP id o1mr33386721pgi.419.1587053591236; Thu, 16 Apr 2020 09:13:11 -0700 (PDT) Date: Thu, 16 Apr 2020 09:12:42 -0700 In-Reply-To: <20200416161245.148813-1-samitolvanen@google.com> Message-Id: <20200416161245.148813-10-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200416161245.148813-1-samitolvanen@google.com> X-Mailer: git-send-email 2.26.1.301.g55bc3eb7cb9-goog Subject: [PATCH v11 09/12] arm64: disable SCS for hypervisor code From: Sami Tolvanen To: Will Deacon , Catalin Marinas , James Morse , Steven Rostedt , Ard Biesheuvel , Mark Rutland , Masahiro Yamada , Michal Marek , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200416_091315_016222_FA501B2D X-CRM114-Status: GOOD ( 11.19 ) X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_MED DKIMwl.org - Medium sender 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: Kees Cook , Jann Horn , Marc Zyngier , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, Miguel Ojeda , Masami Hiramatsu , Sami Tolvanen , clang-built-linux@googlegroups.com, Laura Abbott , Dave Martin , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Disable SCS for code that runs at a different exception level by adding __noscs to __hyp_text. Suggested-by: James Morse Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Acked-by: Marc Zyngier --- arch/arm64/include/asm/kvm_hyp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h index fe57f60f06a8..875b106c5d98 100644 --- a/arch/arm64/include/asm/kvm_hyp.h +++ b/arch/arm64/include/asm/kvm_hyp.h @@ -13,7 +13,7 @@ #include #include -#define __hyp_text __section(.hyp.text) notrace +#define __hyp_text __section(.hyp.text) notrace __noscs #define read_sysreg_elx(r,nvh,vh) \ ({ \