Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754411AbZGFNMX (ORCPT ); Mon, 6 Jul 2009 09:12:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753236AbZGFNMQ (ORCPT ); Mon, 6 Jul 2009 09:12:16 -0400 Received: from tx2ehsobe001.messaging.microsoft.com ([65.55.88.11]:35031 "EHLO TX2EHSOBE001.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752808AbZGFNMP convert rfc822-to-8bit (ORCPT ); Mon, 6 Jul 2009 09:12:15 -0400 X-SpamScore: -20 X-BigFish: VPS-20(zz1432R98dN936eM1805M1878kzz1202hzzz32i6bh43j61h) X-Spam-TCS-SCL: 0:0 X-FB-SS: 5, X-WSS-ID: 0KMD3BV-04-73Z-01 Date: Mon, 6 Jul 2009 15:11:56 +0200 From: Joerg Roedel To: David Woodhouse CC: Joerg Roedel , Zhenyu Wang , airlied@linux.ie, linux-kernel@vger.kernel.org, fujita.tomonori@lab.ntt.co.jp, iommu@lists.linux-foundation.org, mingo@redhat.com, David Miller Subject: Re: IOMMU and graphics cards Message-ID: <20090706131156.GL5380@amd.com> References: <20090507164742V.fujita.tomonori@lab.ntt.co.jp> <20090507100114.GF4059@amd.com> <1241691721.3531.73.camel@macbook.infradead.org> <20090507.113632.210373283.davem@davemloft.net> <20090508093526.GB13708@8bytes.org> <1246883177.2615.33.camel@macbook.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline In-Reply-To: <1246883177.2615.33.camel@macbook.infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) Content-Transfer-Encoding: 8BIT X-OriginalArrivalTime: 06 Jul 2009 13:11:57.0424 (UTC) FILETIME=[57143F00:01C9FE3B] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1398 Lines: 35 On Mon, Jul 06, 2009 at 01:26:17PM +0100, David Woodhouse wrote: > On Fri, 2009-05-08 at 11:35 +0200, Joerg Roedel wrote: > > The other way to achieve consistency is to remove the workaround from > > VT-d code which significantly increases the chance to get the broken > > stuff fixed. David? > > It's gone from 2.6.31-rc2, but even the in-tree drivers break, so I > think we have to put it back for 2.6.31 (I've sent Linus the pull > request already). > > I do intend to remove it again for 2.6.32 though, and I filed > http://bugzilla.kernel.org/show_bug.cgi?id=13721 > > For now it's got a clearer description ("Workaround broken graphics > drivers") and defaults to 'n'. Ok, cool, that sounds good. Which in-kernel DRM drivers break with IOMMU for you? I'll may probably add a similar temporary workaround for AMD IOMMU too... Joerg -- | Advanced Micro Devices GmbH Operating | Karl-Hammerschmidt-Str. 34, 85609 Dornach bei M?nchen System | Research | Gesch?ftsf?hrer: Thomas M. McCoy, Giuliano Meroni Center | Sitz: Dornach, Gemeinde Aschheim, Landkreis M?nchen | Registergericht M?nchen, HRB Nr. 43632 -- 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/