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 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 4055CC433E5 for ; Fri, 24 Jul 2020 17:40:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 205362067D for ; Fri, 24 Jul 2020 17:40:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="UFmzpMf7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726953AbgGXRkb (ORCPT ); Fri, 24 Jul 2020 13:40:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48832 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726381AbgGXRka (ORCPT ); Fri, 24 Jul 2020 13:40:30 -0400 Received: from mail-pj1-x1044.google.com (mail-pj1-x1044.google.com [IPv6:2607:f8b0:4864:20::1044]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06122C0619D3 for ; Fri, 24 Jul 2020 10:40:30 -0700 (PDT) Received: by mail-pj1-x1044.google.com with SMTP id f16so5711045pjt.0 for ; Fri, 24 Jul 2020 10:40:30 -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=QMsfHaQGQ+0SRHcIqI75rby1zzIeBrnwc+TycCSBhRM=; b=UFmzpMf7uzK2lx30P3rhoBpvw5w85/VUsDXt/5ykAeCH/VFrEJEwB9RmNcdbY2LhWz FiNtcwq6cYSJDFEy9jc1V2I68Ud1ixnRqGj5AYeAVOuh08EcTn9UXClFjujGlNhJqqyt /o0xfCbeW0wGt1skpJ0dBBA+3UPdspZahcnFQ= 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=QMsfHaQGQ+0SRHcIqI75rby1zzIeBrnwc+TycCSBhRM=; b=fcbEXgAk4E6jPo2EGEKU2oX4yrwB7MLwDu8A2O2oWCK44o9p/wZNSoOMYJCx3LKjHi UuAjW33jUxDyNxxZ8XwPBAet24PHUjysDG64v4hqb7dXb62khnTddAXTeX7vSWlDsuWF Jv3MjVbO5xH9OzfWfsCEP01GVEQ3wc5BtYLpj5AjrpltB8jX0CcWzYClHI2Yt3oabAdJ IIt/jR1MdWwqmHl8GW2+huSjBkac7gB1Ic20bdEN0azC/1SHRf/WmKp+ZY3owf1UcVzT oFVuI7y6L3IL+vKGRz/7/1Vg+v2GJXahM2BRks56NNIxd8OdFlsjr8HVSDitVr1mms0p sJXQ== X-Gm-Message-State: AOAM532RcIKRyqF0vqCUD1uwcBf6SpJiDHjPFBbhn51aSJQdnWrT0Q7l I7tBunXWF7Im0/IbydRhZ05Tog== X-Google-Smtp-Source: ABdhPJyekeM+nvr+iN70DB8t8eLU5BEdU2IBMUBrLQ9bGL/yN7X161hHc1aZr2MM8o1xGhcfY2+Q3A== X-Received: by 2002:a17:902:9a0a:: with SMTP id v10mr9082983plp.134.1595612429062; Fri, 24 Jul 2020 10:40:29 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id q24sm7188513pfg.34.2020.07.24.10.40.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jul 2020 10:40:28 -0700 (PDT) Date: Fri, 24 Jul 2020 10:40:27 -0700 From: Kees Cook To: Joerg Roedel Cc: x86@kernel.org, Joerg Roedel , hpa@zytor.com, Andy Lutomirski , Dave Hansen , Peter Zijlstra , Jiri Slaby , Dan Williams , Tom Lendacky , Juergen Gross , David Rientjes , Cfir Cohen , Erdem Aktas , Masami Hiramatsu , Mike Stunes , Sean Christopherson , Martin Radev , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH v5 31/75] x86/head/64: Load GDT after switch to virtual addresses Message-ID: <202007241040.4A0CF961@keescook> References: <20200724160336.5435-1-joro@8bytes.org> <20200724160336.5435-32-joro@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200724160336.5435-32-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 24, 2020 at 06:02:52PM +0200, Joerg Roedel wrote: > From: Joerg Roedel > > Load the GDT right after switching to virtual addresses to make sure > there is a defined GDT for exception handling. > > Signed-off-by: Joerg Roedel Reviewed-by: Kees Cook -- Kees Cook