From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753252AbXDJIew (ORCPT ); Tue, 10 Apr 2007 04:34:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753234AbXDJIew (ORCPT ); Tue, 10 Apr 2007 04:34:52 -0400 Received: from srv5.dvmed.net ([207.36.208.214]:33728 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753276AbXDJIev (ORCPT ); Tue, 10 Apr 2007 04:34:51 -0400 Message-ID: <461B4C28.4010806@garzik.org> Date: Tue, 10 Apr 2007 04:34:48 -0400 From: Jeff Garzik User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: Shaohua Li CC: Ashok Raj , linux-kernel@vger.kernel.org, akpm@osdl.org, ak@suse.de, gregkh@suse.de, muli@il.ibm.com, asit.k.mallick@intel.com, suresh.b.siddha@intel.com, anil.s.keshavamurthy@intel.com, arjan@linux.intel.com, Linus Torvalds Subject: Re: [patch 0/8] [Intel IOMMU] Support for Intel Virtualization Technology for Directed I/O References: <20070409215552.221374000@intel.com> <461B4925.9080005@garzik.org> <1176193673.6781.24.camel@sli10-conroe.sh.intel.com> In-Reply-To: <1176193673.6781.24.camel@sli10-conroe.sh.intel.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -4.3 (----) X-Spam-Report: SpamAssassin version 3.1.8 on srv5.dvmed.net summary: Content analysis details: (-4.3 points, 5.0 required) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Shaohua Li wrote: > DMA remapping just uses ACPI table to tell which dma remapping engine a > pci device is controlled by at boot time. At run time, DMA remapping > hasn't any interactive with ACPI. The Linux kernel _really_ wants a non-ACPI way to detect this. Just use the hardware registers themselves, you don't need an ACPI table. Jeff