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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 13C3AC432C3 for ; Mon, 25 Nov 2019 18:35:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EBA9720706 for ; Mon, 25 Nov 2019 18:35:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725870AbfKYSfy (ORCPT ); Mon, 25 Nov 2019 13:35:54 -0500 Received: from mga12.intel.com ([192.55.52.136]:18500 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725793AbfKYSfy (ORCPT ); Mon, 25 Nov 2019 13:35:54 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Nov 2019 10:35:54 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,242,1571727600"; d="scan'208";a="291472327" Received: from sjchrist-coffee.jf.intel.com (HELO linux.intel.com) ([10.54.74.41]) by orsmga001.jf.intel.com with ESMTP; 25 Nov 2019 10:35:53 -0800 Date: Mon, 25 Nov 2019 10:35:53 -0800 From: Sean Christopherson To: Paolo Bonzini Cc: Jim Mattson , Liran Alon , kvm list , Haozhong Zhang Subject: Re: [PATCH] kvm: nVMX: Relax guest IA32_FEATURE_CONTROL constraints Message-ID: <20191125183553.GH12178@linux.intel.com> References: <20191122234355.174998-1-jmattson@google.com> <97EE5F0F-3047-46BC-B569-D407B5800499@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Mon, Nov 25, 2019 at 07:14:15PM +0100, Paolo Bonzini wrote: > On 25/11/19 18:45, Jim Mattson wrote: > > I would call that an opt-out cap, rather than an opt-in cap. That is, > > we'd like to opt-out from the ABI change. I was going to go ahead and > > do it, but it looks like Paolo has accepted the change as it is. > > Yes, your experience has proved that guests are not annoyed by the > discrepancy between VMX_INSIDE_SMX and the actual lack of SMX, so it's > pointless to complicate the code. Color me surprised that no guest cares about SMX :-)