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 78BA8C433E1 for ; Fri, 24 Jul 2020 17:54:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D0D5206EB for ; Fri, 24 Jul 2020 17:54:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="BbNuGRub" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726990AbgGXRyk (ORCPT ); Fri, 24 Jul 2020 13:54:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726676AbgGXRyk (ORCPT ); Fri, 24 Jul 2020 13:54:40 -0400 Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DEBDC0619E4 for ; Fri, 24 Jul 2020 10:54:40 -0700 (PDT) Received: by mail-pf1-x442.google.com with SMTP id f185so690207pfg.10 for ; Fri, 24 Jul 2020 10:54:40 -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=3zh6CKPu9OXN15zjWZk7WlElaxcoMcysSL6HQfo9H3E=; b=BbNuGRub6gajP1oXDi9LwdUymaGqj51igXR8/6ZLQKhDEfSjyi+vtEXaLGXxlqngob kJegiFXVFS80BXaVFZw1O/OKTg/9rxDkgjecPYAyHkfgMBDh/BX8tEvs/bqrbasncZoZ RQVIid6OkNAf+JNeU/aRV3dfwXuwxI59wPrxU= 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=3zh6CKPu9OXN15zjWZk7WlElaxcoMcysSL6HQfo9H3E=; b=uclB7Kw7QvxwoLw5vxelnaAS7iDWzt1mvzcB9znk0Pg/fShCdar9Z2ZDLxJisPs6Cp 0QhyGapssVtk6JmtBPdY4cg3bHMjHiC7NjhvpmaaGuuaAanZuGzFCmvp5qvNUmN5/kAd QsRs4jF0ahYOqNGnpH4IJaMzHtzpq448E4EHEkWyhKmSOVTDZ9OQIs6mIUc/i7fnFLNl z/BKL4UvppE6r01YuBwl0UJ/k/RY0l8jllgJbL4Xi76SD+rTwa/xZfs0pzvBIN4Vr4aL zXpEWyRQA0bjsamr+fMuInVeRnVPtBZ4V8TaWOe1sBCzA099elg+ubclGYEoVs8C0Djc cKfA== X-Gm-Message-State: AOAM531+e+BiNN5hKC7/VviDJwL8DHiMCFJBW9dIf+V28ZHK8NLqSKAq Nq+CWAA677genUDuUFSeovoAFA== X-Google-Smtp-Source: ABdhPJzI1NNk18MRpvgt6+LY08/9F3MGjY/+aI5dG+MQzucT+SD3uVmkPKkrl3cYefTv0keng+DOCg== X-Received: by 2002:a63:3d01:: with SMTP id k1mr9236832pga.71.1595613279983; Fri, 24 Jul 2020 10:54:39 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id d29sm5683851pgb.54.2020.07.24.10.54.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jul 2020 10:54:39 -0700 (PDT) Date: Fri, 24 Jul 2020 10:54:38 -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 38/75] x86/sev-es: Add SEV-ES Feature Detection Message-ID: <202007241054.25B564BA61@keescook> References: <20200724160336.5435-1-joro@8bytes.org> <20200724160336.5435-39-joro@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200724160336.5435-39-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 06:02:59PM +0200, Joerg Roedel wrote: > From: Joerg Roedel > > Add the sev_es_active function for checking whether SEV-ES is enabled. > Also cache the value of MSR_AMD64_SEV at boot to speed up the feature > checking in the running code. > > Signed-off-by: Joerg Roedel Reviewed-by: Kees Cook -- Kees Cook