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 C32B2C433DF for ; Fri, 24 Jul 2020 17:42:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A324E206F6 for ; Fri, 24 Jul 2020 17:42:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="esEqwYwi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726797AbgGXRmx (ORCPT ); Fri, 24 Jul 2020 13:42:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726658AbgGXRmx (ORCPT ); Fri, 24 Jul 2020 13:42:53 -0400 Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 419DBC0619E4 for ; Fri, 24 Jul 2020 10:42:53 -0700 (PDT) Received: by mail-pg1-x541.google.com with SMTP id p3so5674566pgh.3 for ; Fri, 24 Jul 2020 10:42:53 -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=U50zr+VshRe9mYuWVqDq7CNgzIqrkIfFylK6XexbWKE=; b=esEqwYwiF2m2i9Gp06Apxexvboy5U9ul9g68MueBSxJcjBjMQGdvHGFDnJJQap3xxR XhM4nWcCt/BWatQmNXYxfbnHeLB+cwvvzLxCD3ArVYYAeiHf4g3zESPK5T2qMVj5A4ft EhlkS/H1Gn677G/SsxoYiePReMo8rMYLkY4yQ= 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=U50zr+VshRe9mYuWVqDq7CNgzIqrkIfFylK6XexbWKE=; b=TL1QIn6vn0oJkoFapGz6ByqqbCw88D4y3oA1ALaguaQqamrQg2dxYHXdVN/jqfzTMI sU9FsjiPGIvhZgsr5B19ONxMkV1TT0J7F9BPXz0W75FbbIYiGLgVrJVqCl8EMwOx6ZXf qF+VQm0/TnOJIag9EnzhTerLnJj0mHn1/rlQQv0N32MK+xuYwd3++2V2bws+fPDzk/bQ CDVMYIXTgz+1Hdf2Ya8WenRSsoe91iLjj2ETMgWJt6/ZHrdorUAQ1qjX+mFxrN1CZaZW sJeuwcwjnRYPPVRh7tdQ227HayA4TO+NdHcNCWum4ysKmMXfk1AYhBQcojTmhyFxGEKH 6/vQ== X-Gm-Message-State: AOAM530zM3TrQBOLEjpHOAa8Htwe35Kc6hEDElTgtnNUtpGuK9gVbnTj di01hWnVpF0bSIPXkt1AQ9Za3g== X-Google-Smtp-Source: ABdhPJxtKpo45I9LuQoJECycYCtMUIABAY1HmaYIM7v7qjODgmc1ompAK4OP3e0iHW9NrkeIeAJbeA== X-Received: by 2002:a63:fe0a:: with SMTP id p10mr9318212pgh.255.1595612572909; Fri, 24 Jul 2020 10:42:52 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id g28sm6772558pfr.70.2020.07.24.10.42.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jul 2020 10:42:51 -0700 (PDT) Date: Fri, 24 Jul 2020 10:42:51 -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 32/75] x86/head/64: Load segment registers earlier Message-ID: <202007241042.D3E8FC382@keescook> References: <20200724160336.5435-1-joro@8bytes.org> <20200724160336.5435-33-joro@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200724160336.5435-33-joro@8bytes.org> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Fri, Jul 24, 2020 at 06:02:53PM +0200, Joerg Roedel wrote: > From: Joerg Roedel > > Make sure segments are properly set up before setting up an IDT and > doing anything that might cause a #VC exception. This is later needed > for early exception handling. > > Signed-off-by: Joerg Roedel Reviewed-by: Kees Cook -- Kees Cook