Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757896Ab0BQXmy (ORCPT ); Wed, 17 Feb 2010 18:42:54 -0500 Received: from terminus.zytor.com ([198.137.202.10]:33243 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751344Ab0BQXmx (ORCPT ); Wed, 17 Feb 2010 18:42:53 -0500 Message-ID: <4B7C7EB3.6000202@zytor.com> Date: Wed, 17 Feb 2010 15:41:39 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.7) Gecko/20100120 Fedora/3.0.1-1.fc12 Thunderbird/3.0.1 MIME-Version: 1.0 To: Yuhong Bao CC: luca@luca-barbieri.com, mingo@elte.hu, a.p.zijlstra@chello.nl, akpm@linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 10/10] x86-32: panic on !CX8 && XMM References: <1266406962-17463-1-git-send-email-luca@luca-barbieri.com> <1266406962-17463-11-git-send-email-luca@luca-barbieri.com>,<4B7C6FC8.7090107@zytor.com> In-Reply-To: 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 Content-Length: 856 Lines: 20 On 02/17/2010 03:00 PM, Yuhong Bao wrote: > >> NAK in the extreme. >> >> This is not how we deal with these kinds of stuff. If this really >> matters, we explicitly clear the CPU feature in the feature detect code. > Also, don't forget the NT4 CX8 bug with non-Intel/AMD/Cyrix vendors: > http://www.geoffchappell.com/studies/windows/km/cpu/cx8.htm > If a processor support SSE (or PAE or MMX for that matter), you can pretty much assume CX8 exists even if the feature bit is cleared because of this bug. > Those kinds of things we *also* deal with by adjusting the CPU features in the detection code. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/