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=-14.9 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 29AD7C2D0A8 for ; Mon, 28 Sep 2020 16:06:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF03820809 for ; Mon, 28 Sep 2020 16:06:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="fvsDnXfK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726608AbgI1QGL (ORCPT ); Mon, 28 Sep 2020 12:06:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54992 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726409AbgI1QGL (ORCPT ); Mon, 28 Sep 2020 12:06:11 -0400 Received: from mail-ej1-x641.google.com (mail-ej1-x641.google.com [IPv6:2a00:1450:4864:20::641]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6399C061755 for ; Mon, 28 Sep 2020 09:06:10 -0700 (PDT) Received: by mail-ej1-x641.google.com with SMTP id gr14so9349771ejb.1 for ; Mon, 28 Sep 2020 09:06:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=o71LzbqX367JaJH9ttdwJUvGzrnJxktn3m8pbVRAwzw=; b=fvsDnXfKUBOAXccBDwFSPn5D6Csgk0G1mHyAUd74eUxAq5zR8163TbnodrFpDHFksK q2UiyDX8dhCNVWDabaAhGk6xzfG4SXk1cjcB+qzfJ7yDn1xhigkN52Szo+wj1QDppJZy SQIg1zSkc4EsBC+GeqRxR6kysSFmHW8aanRGoDDPzu+9MkTBuf1hXhNNXN+d3nIR/hOU 1p+7sGA15/ttgAVlsAnYSh8fZUQuiNAtvq8tEXBc7wT+Dzt+eNRle4hU6ePzLCSiumPP 94zV7qksW3cZEgcTnZWteH9J53JSPSP4z9MrIiYAh1NbGG9saHFBAmXyiozR7L2/MR6P ARaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=o71LzbqX367JaJH9ttdwJUvGzrnJxktn3m8pbVRAwzw=; b=qGWcJXeHWMj9cr2XecBUdtvdVBIcYVPzteHsjS3EfdPsY1gH4GuQj9vuf8cO6IrZ5j A4wklaAjh0bivklmNIgvOaM8Xie0VItHAQgWt9HAkkLl7BPLucRaZFnBhxEY3RN5O4MV CsuV5g6nNywm6v/cJ9FQqaG90OeMM4RGp35vFZ4fizZNGrh5ih5CGZztLBvJdE1ZeqEw 1GZqA140iJ0/t9r779mtUg3yILUewKLYYTvqaGQAVuwx5MUsd6E6UN1pysV01LABSVJw Oi+dzUh38/8bwuZE0BH6ltcSrg91DkFniMUDKTtM+cKfnixIn5tqAHnoUymzUhKfFtlQ qJcA== X-Gm-Message-State: AOAM531KbkvfhtO7v2muqJdgsbpRlq4eAFQHaxdKBeADII0h9c0yfwp0 USB3mgCwuWESmmezULP8AWEm5VVAbRVwUByfAB9/Cw== X-Google-Smtp-Source: ABdhPJwqh8E0xHjHa+dXhoJEb6VW08INWmr1q9wGgTppwWtMYPE+FmoLDTQjTf5DzUZYK4TAiqHPx/WYKmjPD/totDw= X-Received: by 2002:a17:906:3e08:: with SMTP id k8mr2297800eji.480.1601309169232; Mon, 28 Sep 2020 09:06:09 -0700 (PDT) MIME-Version: 1.0 References: <20200925143422.21718-1-graf@amazon.com> <20200925143422.21718-3-graf@amazon.com> In-Reply-To: <20200925143422.21718-3-graf@amazon.com> From: Aaron Lewis Date: Mon, 28 Sep 2020 09:05:58 -0700 Message-ID: Subject: Re: [PATCH v8 2/8] KVM: x86: Deflect unknown MSR accesses to user space To: Alexander Graf Cc: kvm list , Sean Christopherson , Paolo Bonzini , Jonathan Corbet , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , KarimAllah Raslan , Dan Carpenter , Maxim Levitsky , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > This patch adds a generic interface to handle WRMSR and RDMSR from user > space. With this, any future MSR that is part of the latter categories can > be handled in user space. > > Furthermore, it allows us to replace the existing "ignore_msrs" logic with > something that applies per-VM rather than on the full system. That way you > can run productive VMs in parallel to experimental ones where you don't care > about proper MSR handling. > > Signed-off-by: Alexander Graf > Reviewed-by: Jim Mattson Reviewed-by: Aaron Lewis > > --- > > v1 -> v2: