From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754757AbYIHUSm (ORCPT ); Mon, 8 Sep 2008 16:18:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752899AbYIHUSe (ORCPT ); Mon, 8 Sep 2008 16:18:34 -0400 Received: from terminus.zytor.com ([198.137.202.10]:35709 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752814AbYIHUSd (ORCPT ); Mon, 8 Sep 2008 16:18:33 -0400 Message-ID: <48C587A1.5010206@zytor.com> Date: Mon, 08 Sep 2008 13:14:25 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Arjan van de Ven CC: Linus Torvalds , Ingo Molnar , x86 maintainers , Andrew Morton , Linux Kernel Mailing List Subject: Re: [git pull] x86 fixes References: <200809081752.m88Hq6tn005080@askone.hos.anvin.org> <48C56D60.7010405@zytor.com> <20080908114619.741b6786@infradead.org> <48C57439.3040903@zytor.com> <20080908190249.GA21998@elte.hu> <20080908125525.72bc1ad2@infradead.org> In-Reply-To: <20080908125525.72bc1ad2@infradead.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Arjan van de Ven wrote: > > I'd lump all cpus that don't have cpuid in this bucket too (eg half the > 486es) simply because not having cpuid is painful in pretty much the > same way. > Not really. Detecting CPUID is pretty trivial, and we just initialize the feature vector to zero if it isn't there. >> - "modern 32-bit": PPro and better. Can take CMOV, MMX and TSC for >> granted. > > again makes sense; question is if it makes sense to take PSE and PAE > for granted as well (although PSE we can do runtime I suppose) Well, PAE implies PSE. Unfortunately Intel released a series of Pentium-Ms without PAE support. We *should* be able to take PSE for granted, but there is Xen damage. -hpa