From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756798AbYEVQtg (ORCPT ); Thu, 22 May 2008 12:49:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754167AbYEVQt0 (ORCPT ); Thu, 22 May 2008 12:49:26 -0400 Received: from terminus.zytor.com ([198.137.202.10]:42709 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753643AbYEVQtZ (ORCPT ); Thu, 22 May 2008 12:49:25 -0400 Message-ID: <4835A3EC.1030307@zytor.com> Date: Thu, 22 May 2008 09:48:44 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Dave Jones , "H. Peter Anvin" , Yinghai Lu , Linux Kernel , Ingo Molnar , Thomas Gleixner Subject: Re: [X86] Add recent Centaur CPUs to PAT whitelist References: <200805200409.m4K49V3G024332@gelk.kernelslacker.org> <86802c440805192249y77e78918u8392f5a43331365@mail.gmail.com> <20080520131943.GA4843@redhat.com> <4834B6AC.9090503@zytor.com> <20080522140753.GB20613@redhat.com> In-Reply-To: <20080522140753.GB20613@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dave Jones wrote: > On Wed, May 21, 2008 at 04:56:28PM -0700, H. Peter Anvin wrote: > > Dave Jones wrote: > > > > > > From conversation with Centaur engineers, both the newer generations > > > of the VIA C7, and their future CPUs support PAT, with no known errata. > > > > > > Signed-off-by: Dave Jones > > > > > > > Question: are there any VIA CPUs that display the PAT CPUID flag that > > aren't covered by the above? > > No. They only added PAT support with the current Esther (C7) generation iirc. > OK, so we should just enable VIA unconditionally as long as PAT is displayed and not worry about generation numbers; same with Transmeta (only the Transmeta Efficeon supported PAT, and it had a strictly-coherent memory system.) -hpa