From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161074AbWGNOEX (ORCPT ); Fri, 14 Jul 2006 10:04:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030454AbWGNOEX (ORCPT ); Fri, 14 Jul 2006 10:04:23 -0400 Received: from liaag2ae.mx.compuserve.com ([149.174.40.156]:23493 "EHLO liaag2ae.mx.compuserve.com") by vger.kernel.org with ESMTP id S1030453AbWGNOEW (ORCPT ); Fri, 14 Jul 2006 10:04:22 -0400 Date: Fri, 14 Jul 2006 09:57:54 -0400 From: Chuck Ebbert <76306.1226@compuserve.com> Subject: Re: [patch, take 3] PCI: use ACPI to verify extended config space on x86 To: Arjan van de Ven Cc: linux-pci , Greg KH , Andrew Morton , Andi Kleen , "Brown, Len" , Rajesh Shah , linux-kernel Message-ID: <200607141000_MC3-1-C4FF-945F@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org In-Reply-To: <1152869988.3159.25.camel@laptopd505.fenrus.org> On Fri, 14 Jul 2006 11:39:48 +0200, Arjan van de Ven wrote: > > Extend the verification for PCI-X/PCI-Express extended config > > space pointer. Checks whether the MCFG address range is listed > > as a motherboard resource, per the PCI firmware spec. > > I'm still not quite happy about this; the entire point of the check is > that we CAN'T trust the ACPI implementation, and want a second opinion. > This patch basically asks the ACPI implementation if we can trust the > ACPI implementation. I'm not sure that's a good idea. > And I understood that most issues went away with the more relaxed check > that is in gregkh's tree already (if not in mainline, I should check > that). The more-relaxed check is in mainline. I wrote it, but it didn't even fix the problem on my own machine. This did. According to Rajesh, the spec doesn't require the MCFG space to be e820-reserved, so that's not really a valid check. -- Chuck "You can't read a newspaper if you can't read." --George W. Bush