Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754159AbXICOtR (ORCPT ); Mon, 3 Sep 2007 10:49:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750856AbXICOtF (ORCPT ); Mon, 3 Sep 2007 10:49:05 -0400 Received: from outbound-dub.frontbridge.com ([213.199.154.16]:8977 "EHLO outbound4-dub-R.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751859AbXICOtE (ORCPT ); Mon, 3 Sep 2007 10:49:04 -0400 X-BigFish: VP X-MS-Exchange-Organization-Antispam-Report: OrigIP: 163.181.251.8;Service: EHS X-Server-Uuid: 8C3DB987-180B-4465-9446-45C15473FD3E Date: Mon, 3 Sep 2007 16:48:42 +0200 From: "Robert Richter" To: "Andi Kleen" cc: "Andreas Herrmann" , patches@x86-64.org, linux-kernel@vger.kernel.org Subject: Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona Message-ID: <20070903144842.GK7916@erda.amd.com> References: <20070830174311.221133000@amd.com> <200709031215.03473.ak@suse.de> <20070903112746.GH7916@erda.amd.com> <200709031448.42285.ak@suse.de> MIME-Version: 1.0 In-Reply-To: <200709031448.42285.ak@suse.de> User-Agent: Mutt/1.5.13 (2006-08-11) X-OriginalArrivalTime: 03 Sep 2007 14:48:43.0128 (UTC) FILETIME=[85F45F80:01C7EE39] X-WSS-ID: 6AC2C1470X86422949-01-01 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 926 Lines: 28 Andi, On 03.09.07 14:48:41, Andi Kleen wrote: > > As said above, I do not see CF8 access as a workaround. I expect my > > system to work in the same way also if MMCONFIG is not available. > > It should boot sure, but exotic stuff not working is not a major issue It is not only about booting the system without MMCONFIG, it is also about using the system. For this PCI ECS CF8 access is needed. So why not adding support for this? Excluding major parts of CPU registers when using CF8 base access only will cause writing code to workaround this. Not very nice to handle. -Robert -- AMD Saxony, Dresden, Germany Operating System Research Center email: robert.richter@amd.com - 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/