From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262058AbUBWWGz (ORCPT ); Mon, 23 Feb 2004 17:06:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262061AbUBWWGz (ORCPT ); Mon, 23 Feb 2004 17:06:55 -0500 Received: from mx1.redhat.com ([66.187.233.31]:39642 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S262058AbUBWWGy (ORCPT ); Mon, 23 Feb 2004 17:06:54 -0500 Date: Mon, 23 Feb 2004 14:06:47 -0800 From: "David S. Miller" To: Linus Torvalds Cc: riel@redhat.com, herbert@13thfloor.at, mikpe@csd.uu.se, linux-kernel@vger.kernel.org Subject: Re: Intel vs AMD x86-64 Message-Id: <20040223140647.73bdf091.davem@redhat.com> In-Reply-To: References: <20040223134853.5947a414.davem@redhat.com> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; sparc-unknown-linux-gnu) X-Face: "_;p5u5aPsO,_Vsx"^v-pEq09'CU4&Dc1$fQExov$62l60cgCc%FnIwD=.UF^a>?5'9Kn[;433QFVV9M..2eN.@4ZWPGbdi<=?[:T>y?SD(R*-3It"Vj:)"dP Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 23 Feb 2004 14:08:40 -0800 (PST) Linus Torvalds wrote: > In fact, I _think_ you could actually use the AGP bridge as a strange > IOMMU. Of course, right now their AGP bridges are all 32-bit limited > anyway, but the point being that they at least in theory would seem to > have the capability to do this. Ok, I see. In fact, I remember some vague notion that the AGP bridge on the Athlon's could technically be used as a full-on IOMMU, especially since it was all derived from Alpha PCI chipsets which did use things this way.