From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 815FCC5DF63 for ; Tue, 5 Nov 2019 23:57:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C16921D7D for ; Tue, 5 Nov 2019 23:57:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="p/+qormW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730699AbfKEX46 (ORCPT ); Tue, 5 Nov 2019 18:56:58 -0500 Received: from mail-pf1-f202.google.com ([209.85.210.202]:40505 "EHLO mail-pf1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387632AbfKEX4x (ORCPT ); Tue, 5 Nov 2019 18:56:53 -0500 Received: by mail-pf1-f202.google.com with SMTP id h67so8202651pfb.7 for ; Tue, 05 Nov 2019 15:56:52 -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=HqTT0+ynIKw6E4V0b5+iwDDqZ7QUquJBPmXYeHB9sChD54q5da/4DmcyF7kiieqGbP A+rDlyoijypPpyO/yKSOJJ3uo8zZra0SuS4pYuzULtd5pes7PDKQfuVUXnN6J6OqpZwj FcE+989C4aNRt0T7FmMWb4LGQoJvBvUONtOfyDIqALRJBmFwTXNSBPY70VR9EPA3/TEx VGkoS1E1BLayVoVWq8wdKtlIYoOBIkqYGAcYpifZf26v2vfzzXvE8soL6tnSKfTL0QMH QFvXLPPLnmOKqySO/9XcxLrdDqM35x4f3DEhJ6P4JTv0ZnkDNojlNvCTw8lUzzq3w0LH qArw== X-Gm-Message-State: APjAAAV3ZoLwnfUP9ALqf401Lq57ToMCe34K44r0Eef2V7Q0Jw/vqKVE /47bg0UdWpoE9XP7XHoFUEpJONagdQSkJjRtznc= 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 Cc: Dave Martin , Kees Cook , Laura Abbott , Mark Rutland , Marc Zyngier , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 --- 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)) -- 2.24.0.rc1.363.gb1bccd3e3d-goog