From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756588AbZGFOTX (ORCPT ); Mon, 6 Jul 2009 10:19:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754929AbZGFOTA (ORCPT ); Mon, 6 Jul 2009 10:19:00 -0400 Received: from casper.infradead.org ([85.118.1.10]:36556 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755623AbZGFOS7 (ORCPT ); Mon, 6 Jul 2009 10:18:59 -0400 Subject: Re: IOMMU and graphics cards From: David Woodhouse To: Joerg Roedel 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 In-Reply-To: <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> <20090706131156.GL5380@amd.com> Content-Type: text/plain Date: Mon, 06 Jul 2009 15:18:52 +0100 Message-Id: <1246889932.2615.81.camel@macbook.infradead.org> Mime-Version: 1.0 X-Mailer: Evolution 2.26.2 (2.26.2-1.fc11) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2009-07-06 at 15:11 +0200, Joerg Roedel wrote: > 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... The Intel one definitely broke -- I don't know about the others. There are some old patches at http://people.freedesktop.org/~zhen/agp-mm-* which make it look like _all_ AGP drivers are broken. I wouldn't bother adding the workaround -- as I said, I'm planning to rip it out of 2.6.32 (and in linux-next as soon as it's reasonable to do so). Let's just let them fix it. -- David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation