Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763623AbXEWVJz (ORCPT ); Wed, 23 May 2007 17:09:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755509AbXEWVJt (ORCPT ); Wed, 23 May 2007 17:09:49 -0400 Received: from srv5.dvmed.net ([207.36.208.214]:37089 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755450AbXEWVJs (ORCPT ); Wed, 23 May 2007 17:09:48 -0400 Message-ID: <4654AD91.1030808@pobox.com> Date: Wed, 23 May 2007 17:09:37 -0400 From: Jeff Garzik User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: Jesse Barnes CC: Linus Torvalds , Robert Hancock , Olivier Galibert , linux-kernel , Andi Kleen , Chuck Ebbert , Len Brown Subject: Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard resources References: <4635510D.4060103@shaw.ca> <200705231349.56976.jbarnes@virtuousgeek.org> <200705231403.24439.jbarnes@virtuousgeek.org> In-Reply-To: <200705231403.24439.jbarnes@virtuousgeek.org> 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 Content-Length: 1143 Lines: 31 Jesse Barnes wrote: > Apparently Vista will move away from using type 1 config space accesses > though, so if we keep using it, we'll probably run into some lame board Yep. > that assumes you're using mmconfig at some point in the near future. > But then again, we're often on that less tested path (e.g. with ACPI), > so maybe that doesn't matter much. One of the reasons why hardware vendors want to move away from traditional accesses is to be able to use the larger config space in PCI-Express, rather than being locked into the 256-byte legacy PCI config space. Several modern PCI-Express devices utilize the upper config space, but due to legacy reasons the registers are usually ones that do not require OS drivers to know about (like BIST stuff or diagnostic registers). Expect that to change, as MS shakes out the bugs (or maybe we are doing their job for them?). Jeff - 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/