From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932888AbaLDR3W (ORCPT ); Thu, 4 Dec 2014 12:29:22 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60559 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932219AbaLDR3V (ORCPT ); Thu, 4 Dec 2014 12:29:21 -0500 Message-ID: <548099DF.4080202@redhat.com> Date: Thu, 04 Dec 2014 18:29:03 +0100 From: Paolo Bonzini User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Greg KH CC: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, rkrcmar@redhat.com, Wanpeng Li , stable@vger.kernel.org, x86@kernel.org, "H. Peter Anvin" Subject: Re: [PATCH 1/9] x86: export get_xsave_addr References: <1417708634-24333-1-git-send-email-pbonzini@redhat.com> <1417708634-24333-2-git-send-email-pbonzini@redhat.com> <20141204163443.GA1477@kroah.com> In-Reply-To: <20141204163443.GA1477@kroah.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/12/2014 17:34, Greg KH wrote: > On Thu, Dec 04, 2014 at 04:57:06PM +0100, Paolo Bonzini wrote: >> > get_xsave_addr is the API to access XSAVE states, and KVM would >> > like to use it. Export it. > Use it in what way? As in patch 2/9, to avoid that upgrading to a newer processor breaks userspace ABI. >> > Cc: stable@vger.kernel.org > Why is this a stable patch? Because as of now, Skylake processors have a different userspace ABI than previous generations. Paolo