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=-7.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 1D4FCC43461 for ; Thu, 3 Sep 2020 22:45:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D913A20716 for ; Thu, 3 Sep 2020 22:45:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Zx5KJ4dv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729545AbgICWpe (ORCPT ); Thu, 3 Sep 2020 18:45:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56344 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728107AbgICWpe (ORCPT ); Thu, 3 Sep 2020 18:45:34 -0400 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B0839C061245 for ; Thu, 3 Sep 2020 15:45:33 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id 7so3258035pgm.11 for ; Thu, 03 Sep 2020 15:45:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=LpH2+c3Q5/rnXgDQMsrsJ9HiSsfoyzj1qvyyccEruIs=; b=Zx5KJ4dvVR2kYJ0RF1K2y79qhIcjc7yrsCRJoTz5s2zCxiKL8II6gShD3dRiuI5JuE CAqlIg/RCYIqxwgBTCdJCoxlCyAR33IC7dws/kSOZM0OWTmWQqku5KG5vBN3wHaXWX2J L3kWlvlx6YmS4Z9tOt3VwHxiD169ei5sQPoz8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=LpH2+c3Q5/rnXgDQMsrsJ9HiSsfoyzj1qvyyccEruIs=; b=HOseXshZm84qv4kF8k1+VCWxRmLeKEL1qrcsTJnR/18YbM4njpS5E89RApEloYUEt5 fhtU0Ivo4/FM76OS+HOLsecRm/VUNCRgmC+r15rCc+YK7k8YPrVog5nncSQPGPN9POvY B30fB6Y3YvzTKFLgu8WYMTeO7htHBStp5BFLLowYNfvZ3hA+8FoqG28Qj0gs3RT1e9kI gIOe3LPLRZvtdJr4WD92r6PCqoVO9CXQhYQxYwS6BoLHMxUGkyzLXgL6K4H3ichokE24 BTWah3Xm/Kl8ghGhDgj5XFUnWOtEXXWaTsx4bIjppulH2U7C1jVbqaUGIcPe5AsMiLlG n+Cg== X-Gm-Message-State: AOAM533+VrOtlNfnS6Zwub0MvfKvR8NReKBd4s7snQ9dkhYPzWVrPBdd nfkAn331QRTJThmJDb8ca1A21w== X-Google-Smtp-Source: ABdhPJw+gsOOUY6Clu21aqvi2zeFtbK32caDaCf93/U25KjvZIefQe4UypsHJhKhOKzenMYzI/0+7Q== X-Received: by 2002:a17:902:82c7:: with SMTP id u7mr1398150plz.240.1599173133340; Thu, 03 Sep 2020 15:45:33 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id r123sm4320262pfc.187.2020.09.03.15.45.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Sep 2020 15:45:32 -0700 (PDT) Date: Thu, 3 Sep 2020 15:45:31 -0700 From: Kees Cook To: Sami Tolvanen Cc: Masahiro Yamada , Will Deacon , Peter Zijlstra , Steven Rostedt , Greg Kroah-Hartman , "Paul E. McKenney" , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH v2 24/28] KVM: arm64: disable LTO for the nVHE directory Message-ID: <202009031545.42ECDC8F7F@keescook> References: <20200624203200.78870-1-samitolvanen@google.com> <20200903203053.3411268-1-samitolvanen@google.com> <20200903203053.3411268-25-samitolvanen@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200903203053.3411268-25-samitolvanen@google.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Thu, Sep 03, 2020 at 01:30:49PM -0700, 'Sami Tolvanen' via Clang Built Linux wrote: > We use objcopy to manipulate ELF binaries for the nvhe code, > which fails with LTO as the compiler produces LLVM bitcode > instead. Disable LTO for this code to allow objcopy to be used. > > Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook -- Kees Cook