From patchwork Tue Nov 5 23:56:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11229013 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5E41F1599 for ; Tue, 5 Nov 2019 23:59:55 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1A27D206B8 for ; Tue, 5 Nov 2019 23:59:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="E6oNdT2Z"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="p/+qormW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1A27D206B8 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:To:From:Subject:References:Mime-Version :Message-Id:In-Reply-To:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=web2MIqdaQaZlmbioBDkjzWbHxP3CjuG09uVLcrnlVY=; b=E6oNdT2Z4tmz+4 o3Yf4HkO/zxzy/FBErkk2LbOZooRowXWbXHbBce4khoMFciW6GQhbg2CPKC0v2Ef38ecImgdGpvKi uEWxaVJR/+u9GimDRWGjk/nLSyKIYncz7QP2lr57OBH8ANNgZlY9iW4iUEyet6cecACsCxzwvCLRG YEaIN7mWr4gy12WHG4ByJhyqvbTi6QkM6E6s76XTQ7PvTJWLNZx7UeZ3M8GKPyzOr4exxeKGlZPW4 Ba1B5rWof7JxOYDNZNOzEjZJ8sha+RkRosQG+/W1fqqrKD4o9eeEcaRegEzFH/fvkbr/QGoa93+f1 GIBMdaXoWhpAhE08pdkw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iS8jn-0002gK-SC; Tue, 05 Nov 2019 23:59:51 +0000 Received: from mail-pg1-x549.google.com ([2607:f8b0:4864:20::549]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iS8gw-0008ET-7G for linux-arm-kernel@lists.infradead.org; Tue, 05 Nov 2019 23:56:56 +0000 Received: by mail-pg1-x549.google.com with SMTP id b14so16303732pgm.22 for ; Tue, 05 Nov 2019 15:56:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=SBPjjox/K0nQBp9p/UReaX06mOCKZA5VG5oKrHSRp3U=; b=p/+qormWzpAk/hn6fTIAq1GD6e0WQRag5NF7NjqAhGo5V+9tCeqWxMigwtXWt/lGNp q9buszXWKYVWoziPQLZS51iBSuLA1nUdgVLAfYt05cUtAWebiilSqti+DjDN8Q0UKshx 57MAdb8441Kh4kMQAc47B2g6uSc/jktWoSENQoAO1SfBArC0JfH71OE1ZC9X88wFzf7D 1zKwIMNiGpyq7Ox2PdBV9bj7qpbfLeuEOQjRxH+b5fzmSdlQBlgmJqQb6wUCW+t/kkJd W22heVjnv5z8zfiAr2e8BVc/Krx9f9PGp3snmyjgH+VW1d5sU1rFDMtHZ42LB6knm6uR i+NA== X-Google-DKIM-Signature: v=1; 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=SBPjjox/K0nQBp9p/UReaX06mOCKZA5VG5oKrHSRp3U=; b=f7DcQmiqtqUFrJ14jjkBNR7st1xcTOhLTTfadtFchM10EHHZSp94Ru70H7Xqm1fmXM vaH5I/ltdX8GS6I3mATwSry0BvRbEQju0U0se+7KEXA3Avg8PbliFL8oQddnNy8TduMz U/fUnD9AF9t0rL3W7jtizgF/YmMnkvb6v5gPOFoosKr8EEKvHDPXhOZ6NViOtw/WLAd2 X76ZxPpGgVJvOqscYao/bqRA+GHhzWr+cC7QJ8/Mkc7KhdZe/1LmAf3PqDbBvUTgSbnX qI3+8XaxF+mj3bss93AovOUta29xSYtzaX6r+z2rBdl5ZFCecsEygpwosF48BpimMgp7 tOGA== X-Gm-Message-State: APjAAAXxLO/WRI9z3X4wJizIMMjqJwxsXq6FVSXD4GSYaD97xyMZoUCw Q6qYSjSIVCTZmflKIAOrmO2CsNDrod5f9wPdJ7A= X-Google-Smtp-Source: APXvYqwMtHOZMoB23ssF7JNCZzaMw12LgXJO1Cx/fyHqurm8wqZn755XqIGbFFeB1mv3cEwMcIBCpgy6byzfZbrNKqg= X-Received: by 2002:a63:6483:: with SMTP id y125mr5619534pgb.444.1572998212169; Tue, 05 Nov 2019 15:56:52 -0800 (PST) Date: Tue, 5 Nov 2019 15:56:07 -0800 In-Reply-To: <20191105235608.107702-1-samitolvanen@google.com> Message-Id: <20191105235608.107702-14-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191105235608.107702-1-samitolvanen@google.com> X-Mailer: git-send-email 2.24.0.rc1.363.gb1bccd3e3d-goog Subject: [PATCH v5 13/14] arm64: disable SCS for hypervisor code From: Sami Tolvanen 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-20191105_155654_370569_854980E7 X-CRM114-Status: UNSURE ( 9.57 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:549 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an 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_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 -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -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: Mark Rutland , Kees Cook , Jann Horn , Masahiro Yamada , Marc Zyngier , 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 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Filter out CC_FLAGS_SCS for code that runs at a different exception level. Suggested-by: Steven Rostedt (VMware) Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Reviewed-by: Mark Rutland --- arch/arm64/kvm/hyp/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile index ea710f674cb6..17ea3da325e9 100644 --- a/arch/arm64/kvm/hyp/Makefile +++ b/arch/arm64/kvm/hyp/Makefile @@ -28,3 +28,6 @@ GCOV_PROFILE := n KASAN_SANITIZE := n UBSAN_SANITIZE := n KCOV_INSTRUMENT := n + +# remove the SCS flags from all objects in this directory +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))