From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752021AbWFWUSi (ORCPT ); Fri, 23 Jun 2006 16:18:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752022AbWFWUSh (ORCPT ); Fri, 23 Jun 2006 16:18:37 -0400 Received: from srv5.dvmed.net ([207.36.208.214]:41392 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S1752021AbWFWUSh (ORCPT ); Fri, 23 Jun 2006 16:18:37 -0400 Message-ID: <449C4C8B.4010009@garzik.org> Date: Fri, 23 Jun 2006 16:18:19 -0400 From: Jeff Garzik User-Agent: Thunderbird 1.5.0.4 (X11/20060614) MIME-Version: 1.0 To: rajesh.shah@intel.com CC: ak@suse.de, gregkh@suse.de, akpm@osdl.org, brice@myri.com, 76306.1226@compuserve.com, arjan@linux.intel.com, linux-pci@atrey.karlin.mff.cuni.cz, linux-kernel@vger.kernel.org Subject: Re: [patch 0/2] PCI: improve extended config space verification References: <20060623200928.036235000@rshah1-sfield.jf.intel.com> In-Reply-To: <20060623200928.036235000@rshah1-sfield.jf.intel.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -4.2 (----) X-Spam-Report: SpamAssassin version 3.1.3 on srv5.dvmed.net summary: Content analysis details: (-4.2 points, 5.0 required) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org rajesh.shah@intel.com wrote: > ACPI defines an MCFG table that gives us the pointer to where the > extended PCI-X/PCI-Express configuration space exists. We validate > this region today by making sure that the reported range is marked > as reserved in the int 15 E820 memory map. However, the PCI firmware > spec states this is optional and BIOS should be reporting the MCFG > range as a motherboard resources. Several of my systems failed the > existing check and ended up without extended PCI-Express config > space. This patch extends the verification to also look for the > MCFG range as a motherboard resource in ACPI. This solves the > problem on my i386 as well as x86_64 test systems. On a related note -- PCI segments potentially enumerated in ACPI -- I have a PCI segments patch available at: 'pciseg' branch of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6.git GregKH also has a few fixes for this which I need to integrate, too. Jeff