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 03ED5C433DF for ; Fri, 24 Jul 2020 17:57:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D7880206D8 for ; Fri, 24 Jul 2020 17:57:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="CJVXb5n6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727784AbgGXR5j (ORCPT ); Fri, 24 Jul 2020 13:57:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51600 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726317AbgGXR5j (ORCPT ); Fri, 24 Jul 2020 13:57:39 -0400 Received: from mail-pj1-x1041.google.com (mail-pj1-x1041.google.com [IPv6:2607:f8b0:4864:20::1041]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37ADCC0619E4 for ; Fri, 24 Jul 2020 10:57:39 -0700 (PDT) Received: by mail-pj1-x1041.google.com with SMTP id t15so5737220pjq.5 for ; Fri, 24 Jul 2020 10:57:39 -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=kMaFwW8t3IfIMVggiKK5OHJuDKp9jaqqEbc7QFoh/rs=; b=CJVXb5n6JR5dWMx2tAJLg0bcwhbi4VQqyjo9ptukfmM2mUWjqZH+jR4n9It2TyDcL6 DImQfQV/+SB3ARDdJ+h56qcR6WkyApTGi8w3+KG7PXrxzaipl3pJotCGKEKeeIXseiao kT7/1zeJ2y2o+p3sPye32JbtH4ABoCfClNQCs= 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=kMaFwW8t3IfIMVggiKK5OHJuDKp9jaqqEbc7QFoh/rs=; b=IegCKAQImafrfDSMwaG6NY7LR9DwTWraXETE9DDbZ1SKCMWzYacLVI+nhgJdA58N4i rfAjrS28ACbgJ1C9nEYFcst2rqkWFPGNuY2PpQ2Thrtjw+0ZuZpn6lM+OrZpBYYQDWXX CY1FdX4KuiSXR+C+SDuvHHV2tQq7X5pnjnYNNcT3VBQerOHKJl2ys5calPPl0I9B2dpv hJI31nSn/9WYNTg2S0JTXA2NwDFsSm+/XaLP02isN5Ns88rnFG5Lg6sYNdqP1LdozstD kNYL7C6xmkgUn65zCG/7t3JRo1Sdq69+jB5AKUJ4MokSdQxhrJvf8e0mMwTJ1n90s1zN LCLw== X-Gm-Message-State: AOAM531pkVJd2L+KiUy0k0iAcgsfGBm+d52tRuHLkqSnviM/hq3/lIzC oer+sekI+PDvRvWmn1hOF2BGhQ== X-Google-Smtp-Source: ABdhPJwT1ivDifcMkDJuyupKZW8COKgntYhL394BofNxgSA9BgFQyVU125t2d5Ivjc4ONMX5CLywvA== X-Received: by 2002:a17:90a:ed87:: with SMTP id k7mr6699745pjy.31.1595613458750; Fri, 24 Jul 2020 10:57:38 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id g6sm6950620pfr.129.2020.07.24.10.57.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jul 2020 10:57:37 -0700 (PDT) Date: Fri, 24 Jul 2020 10:57:36 -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 70/75] x86/head/64: Don't call verify_cpu() on starting APs Message-ID: <202007241057.2D78C2A41B@keescook> References: <20200724160336.5435-1-joro@8bytes.org> <20200724160336.5435-71-joro@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200724160336.5435-71-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 06:03:31PM +0200, Joerg Roedel wrote: > From: Joerg Roedel > > The APs are not ready to handle exceptions when verify_cpu() is called > in secondary_startup_64. > > Signed-off-by: Joerg Roedel Thanks for updating this! :) Reviewed-by: Kees Cook -- Kees Cook