Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031571AbXEDVGw (ORCPT ); Fri, 4 May 2007 17:06:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1031707AbXEDVGw (ORCPT ); Fri, 4 May 2007 17:06:52 -0400 Received: from mga03.intel.com ([143.182.124.21]:54980 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031571AbXEDVGv (ORCPT ); Fri, 4 May 2007 17:06:51 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.14,494,1170662400"; d="scan'208";a="224458676" From: Jesse Barnes To: Robert Hancock Subject: Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard resources Date: Fri, 4 May 2007 14:06:59 -0700 User-Agent: KMail/1.9.6 Cc: Olivier Galibert , linux-kernel , Andi Kleen , Chuck Ebbert , Len Brown References: <4635510D.4060103@shaw.ca> <4639229C.4030208@shaw.ca> <200705021654.23730.jbarnes@virtuousgeek.org> In-Reply-To: <200705021654.23730.jbarnes@virtuousgeek.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200705041406.59584.jesse.barnes@intel.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1554 Lines: 34 On Wednesday, May 2, 2007 4:54 pm Jesse Barnes wrote: > > What happens if you take out the chipset register detection, does > > the MCFG table give you the same result? Wonder if they're doing > > something funny with start/end bus values or something in their > > table. There's some code in my patch that prints out the important > > data from the MCFG table, can you tell me what that shows with the > > chipset detection taken out? > > Yeah, I'll look a little more closely. It could also be that another > register needs tweaking somewhere to actually get the bridge to > decode the space. > > > If that doesn't provide any useful information, I think we may need > > some assistance from Intel chipset/motherboard people to figure out > > what is going on here.. > > I'm talking with them now, hopefully they'll shed some light on it. I did a little more debugging this morning, and found that I can actually do reads from the space described by ACPI and the device register, but later when ACPI actually scans the root bridges, it hangs. Specifically the call to pci_acpi_scan_root in pci_root.c:acpi_pci_root_add() never seems to return. I'll walk through that logic when I get back to my test box, but it's also worth noting that Vista's MCFG on this machine apparently works ok too. Jesse - 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/