From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756106Ab2GYA5h (ORCPT ); Tue, 24 Jul 2012 20:57:37 -0400 Received: from terminus.zytor.com ([198.137.202.10]:49506 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754486Ab2GYA5g (ORCPT ); Tue, 24 Jul 2012 20:57:36 -0400 Message-ID: <500F4463.9050702@zytor.com> Date: Tue, 24 Jul 2012 17:57:07 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120605 Thunderbird/13.0 MIME-Version: 1.0 To: Vladimir Davydov CC: Borislav Petkov , Andre Przywara , Thomas Gleixner , Ingo Molnar , Andi Kleen , Borislav Petkov , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , Andreas Herrmann Subject: Re: [PATCH 2/2] cpu: intel, amd: mask cleared cpuid features References: <73e09fb43e37de851acda10dc64bc495a5b68357.1342801662.git.vdavydov@parallels.com> <20120721103715.GA3632@aftab.osrc.amd.com> <500E4960.8040307@parallels.com> <500E5951.5020900@amd.com> <500E5CDF.5000504@parallels.com> <20120724101041.GA24739@aftab.osrc.amd.com> <500E8280.6050905@parallels.com> In-Reply-To: <500E8280.6050905@parallels.com> X-Enigmail-Version: 1.4.3 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/24/2012 04:09 AM, Vladimir Davydov wrote: > > We have not encountered this situation in our environments and I hope we > won't :-) > > But look, these CPUID functions cover majority of CPU features, don't > they? So, most of "normal" apps inside VM will survive migration. > Perhaps, some low-level utils won't. I guess that's why there are no > MSRs for other levels provided by vendors. > You will once Ivy Bridge becomes common. -hpa