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,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 81992C2D0DB for ; Tue, 28 Jan 2020 18:50:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5891424681 for ; Tue, 28 Jan 2020 18:50:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="XUGEKZAh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726906AbgA1SuF (ORCPT ); Tue, 28 Jan 2020 13:50:05 -0500 Received: from mail-pf1-f201.google.com ([209.85.210.201]:56883 "EHLO mail-pf1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726821AbgA1SuC (ORCPT ); Tue, 28 Jan 2020 13:50:02 -0500 Received: by mail-pf1-f201.google.com with SMTP id r29so1208039pfl.23 for ; Tue, 28 Jan 2020 10:50:01 -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=g0WhvzNfeF8IPmBIIuRbqPpME0iXsXClcoR+8QuQDeM=; b=XUGEKZAhBvSu9urDokgThLy629jPYLYOSmnR3mhcWiS20LG7HIFJnnyG7U9FeOKODN dRcN/ygKYsH8zvUKqKrrEoAeiJh6xj9bUwUihjFNwrC/HNMCo631ZmTMa3qkV5FANr8P 6Bjc+r6yLtlgBlUAHhWWjX/TBrDG4QySpa2+C3PTWI7oznRugEbMlEysjsNyTLYh3Ly7 v4QRry1d0cr919cFyJZHFpX/pPX+XmluNzInaHF+jkT6HB6vLrQ8GXNwv3HX2Ci3+Tcp DP6fw9+xZnGwQ4GQ+XUf08VGNsAQ/+zNH2o7Wt5M0nyNImoOhkc1Qa5/vpdDpvtQ4s0K vK7A== 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=g0WhvzNfeF8IPmBIIuRbqPpME0iXsXClcoR+8QuQDeM=; b=THX9qHvzKly9ERuaR0yu4xk6veTQgwMchQ4NdVw86J+3XrRaUgKoFWpNLFI0tS8z57 sCw1kXwMAMod5XYlqqqn9bPcT+h3mSe3kQdGhob9p18YpxCg5c+9F9KxxBJNqmsFKpz+ DwiCPjXb2+EJMuSn0BfPY5amjM6J5uWnAgVUzPc9Be8z/fNUNbdrhzFwvkSdzeK10a4b 6GktUc8ZQwkBBIdujj7FMNjouJ7ezoLsDeofywU+t6cLw2uMcSEAkO+yUyDV+/uWBAAP fD0TBHzGwO0itBhap05DgKcmar63TAvQMUPaE7H8DS9RzRGRcYixOlPw+bzN6hoAjrTW R0Eg== X-Gm-Message-State: APjAAAWFlaiQZiR37amSHKYdUskTRLpwDH2QKBRkeD+suhIZA6WYOLfR a1vkcfAglPW1ZwrF5s+tZom4jxSpGZnOOq62pQQ= X-Google-Smtp-Source: APXvYqwm7y9ypcJdyxgJATkCgSChfFuwRpCL+hYKepF5YmIgtTs92oWD8GlXJgm6y8lRU+5VPoS8wWchRxTA1u6Ws80= X-Received: by 2002:a63:d90c:: with SMTP id r12mr19771294pgg.106.1580237401355; Tue, 28 Jan 2020 10:50:01 -0800 (PST) Date: Tue, 28 Jan 2020 10:49:32 -0800 In-Reply-To: <20200128184934.77625-1-samitolvanen@google.com> Message-Id: <20200128184934.77625-10-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200128184934.77625-1-samitolvanen@google.com> X-Mailer: git-send-email 2.25.0.341.g760bfbb309-goog Subject: [PATCH v7 09/11] arm64: disable SCS for hypervisor code From: Sami Tolvanen To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland , james.morse@arm.com Cc: Dave Martin , Kees Cook , Laura Abbott , 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 and -ffixed-x18 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..5843adef9ef6 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 -ffixed-x18 $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) -- 2.25.0.341.g760bfbb309-goog