Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1767253AbXEBXpk (ORCPT ); Wed, 2 May 2007 19:45:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1767259AbXEBXpk (ORCPT ); Wed, 2 May 2007 19:45:40 -0400 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:7643 "EHLO pd4mo2so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767253AbXEBXpj (ORCPT ); Wed, 2 May 2007 19:45:39 -0400 Date: Wed, 02 May 2007 17:45:32 -0600 From: Robert Hancock Subject: Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard resources In-reply-to: <200705021057.31393.jbarnes@virtuousgeek.org> To: Jesse Barnes Cc: Olivier Galibert , linux-kernel , Andi Kleen , Chuck Ebbert , Len Brown Message-id: <4639229C.4030208@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: <4635510D.4060103@shaw.ca> <200705012227.31729.jbarnes@virtuousgeek.org> <4638A17C.40209@shaw.ca> <200705021057.31393.jbarnes@virtuousgeek.org> User-Agent: Thunderbird 2.0.0.0 (Windows/20070326) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3012 Lines: 60 Jesse Barnes wrote: > On Wednesday, May 2, 2007 7:34 am Robert Hancock wrote: >> Jesse Barnes wrote: >>> On Tuesday, May 01, 2007, Jesse Barnes wrote: >>>>> I'm testing it now on my 965... >>>> Bah... nevermind Robert, I see you're doing this already in >>>> pci_mmcfg_reject_broken. I'm about to reboot & test now. >>> Ok, I've tested a bit on my 965 (after re-adding my old patch to >>> support it) and the new checks are more complete, but my BIOS still >>> appears to be buggy. >>> >>> The extended config space (as defined by the register) is at >>> 0xf0000000 (full value is 0xf0000003 indicating 128M enabled). The >>> ACPI MCFG table has this space reserved according to Robert's new >>> code, but the machine hangs due to the address space aliasing >>> Olivier mentioned awhile back. I don't have a PCIe card to test >>> with (or any devices that require extended config space that I know >>> of) so I can't really tell if Windows supports PCIe on this >>> platform, but if it does I don't see how it would w/o having a full >>> bridge driver and sophisticated address space allocation builtin. >> Windows XP doesn't use MMCONFIG or any extended configuration space. >> I believe Vista is supposed to, though. Not sure how they are >> handling this issue. > > Oh right... Vista will be the first to fully support PCIe & mcfg... > >> Can you post what your board has for PNPACPI reserved resources (I >> believe they're in /sys/devices/pnp0/*/resources IIRC, don't have a >> Linux box handy right now). Full dmesg would also be useful, I think >> it dumps out those reservations at boot nowadays.. > > BIOS update didn't help. Here's the boot log and a dump of the pnp0 > resources. Curious.. It looks like the ACPI resources have the correct reservation for the MMCONFIG window according to what the register says the location should be. There's no other reservations that overlap with that range (f000000-f7ffffff), and according to the 965 datasheet there's nothing that's hard-coded to occupy that memory range. I can't really see what this range could be conflicting with. 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? 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.. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.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/