Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757049AbZKKIEQ (ORCPT ); Wed, 11 Nov 2009 03:04:16 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756919AbZKKIEP (ORCPT ); Wed, 11 Nov 2009 03:04:15 -0500 Received: from terminus.zytor.com ([198.137.202.10]:52634 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756905AbZKKIEP (ORCPT ); Wed, 11 Nov 2009 03:04:15 -0500 Message-ID: <4AFA6E50.7030808@zytor.com> Date: Tue, 10 Nov 2009 23:57:04 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.1) Gecko/20090814 Fedora/3.0-2.6.b3.fc11 Thunderbird/3.0b3 MIME-Version: 1.0 To: Willy Tarreau CC: Ingo Molnar , Pavel Machek , Avi Kivity , Alan Cox , Matteo Croce , Sven-Haegar Koch , linux-kernel@vger.kernel.org Subject: Re: i686 quirk for AMD Geode References: <20091110205445.GB1407@ucw.cz> <20091110211259.GD26633@1wt.eu> <4AF9D8E2.7050205@zytor.com> <20091110220652.GE26633@1wt.eu> <4AF9E61B.5090407@zytor.com> <20091110222031.GA22911@elte.hu> <20091110224222.GA28648@1wt.eu> <4AF9ED78.3000106@zytor.com> <20091111055220.GA560@1wt.eu> <4AFA569E.9040206@zytor.com> <20091111063617.GD560@1wt.eu> In-Reply-To: <20091111063617.GD560@1wt.eu> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 980 Lines: 30 On 11/10/2009 10:36 PM, Willy Tarreau wrote: >> >> Do you have *any* *evidence* *whatsoever* for that assertion?! > > No, just basic feeling based on implementation cost and difficulty > vs gains as I explained. Quite on the contrary; in hardware it would be pretty hard to *not* do the right thing. >> I personally will consider something that doesn't implement proper >> security check to be a potential security hole and will NAK the patch. > > Even in the case of the NOPL instruction ? I clearly don't see > the potential security hole ! > You have it backwards. Prove that there *isn't* one and we'll talk. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- 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/