linux-kernel - Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard resources

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Message-ID: <4654B397.8090802@pobox.com>
Date:	Wed, 23 May 2007 17:35:19 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Robert Hancock <hancockr@...w.ca>,
	Olivier Galibert <galibert@...ox.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...e.de>, Chuck Ebbert <cebbert@...hat.com>,
	Len Brown <lenb@...nel.org>
Subject: Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard
 resources

Alan Cox wrote:
>> 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.
> 
> Mostly for treacherous computing extensions where subsets of the config
> space can only be accessed by signed machines blessed by your favourite
> movie company and video card vendor...

Um, no, Mr. Paranoia, it's a standard part of the spec.

	Jeff



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