Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760903AbYGBF5o (ORCPT ); Wed, 2 Jul 2008 01:57:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754129AbYGBF5e (ORCPT ); Wed, 2 Jul 2008 01:57:34 -0400 Received: from mis011.exch011.intermedia.net ([64.78.21.10]:13110 "EHLO mis011.exch011.intermedia.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754400AbYGBF5e (ORCPT ); Wed, 2 Jul 2008 01:57:34 -0400 X-Greylist: delayed 909 seconds by postgrey-1.27 at vger.kernel.org; Wed, 02 Jul 2008 01:57:34 EDT From: Amit Shah Organization: Qumranet Inc. To: iommu@lists.linux-foundation.org Subject: Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry Date: Wed, 2 Jul 2008 11:15:17 +0530 User-Agent: KMail/1.9.9 Cc: Joerg Roedel , Muli Ben-Yehuda , Adrian Bunk , robert.richter@amd.com, linux-kernel@vger.kernel.org, Ben-Ami Yassour1 , Andi Kleen , Sebastian.Biemueller@amd.com, tglx@linutronix.de, mingo@redhat.com, bhavna.sarathy@amd.com References: <1214508490-29683-2-git-send-email-joerg.roedel@amd.com> <20080627173100.GD26130@il.ibm.com> <20080627174034.GG10197@8bytes.org> In-Reply-To: <20080627174034.GG10197@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200807021115.18242.amit.shah@qumranet.com> X-OriginalArrivalTime: 02 Jul 2008 05:42:23.0539 (UTC) FILETIME=[66F64830:01C8DC06] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1121 Lines: 26 On Friday 27 June 2008 23:10:35 Joerg Roedel wrote: > On Fri, Jun 27, 2008 at 01:31:00PM -0400, Muli Ben-Yehuda wrote: > > > > > and to handle devices with limited DMA address ranges. > > > > > > > > I'd be pretty surprised if you'll find such devices on machines which > > > > will have AMD's IOMMU... > > > > > > Think of 32bit PCI devices in a host with more than 4GB memory :) > > > > I am thinking of them and I'd be surprised if you'd find any in such > > machines. Certainly I assume none of the on-board devices will have > > this ancient limitation. But hey, it could happen ;-) > > The IOMMU machine under my desk has a 32bit PCI slot with a card in it Also, remember the "odd-ball devices" we had in our "why is PCI passthrough needed" slide? People might want to upgrade to newer servers and still retain their old PCI devices and assign them to guests. Amit -- 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/