linux-kernel - Re: [PATCH] x86_64: set cfg_size for AMD Family 10h in case MMCONFIG is used

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Message-Id: <200709131353.15752.ak@suse.de>
Date:	Thu, 13 Sep 2007 13:53:15 +0200
From:	Andi Kleen <ak@...e.de>
To:	Greg KH <greg@...ah.com>
Cc:	Yinghai Lu <Yinghai.Lu@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jeff Garzik <jeff@...zik.org>, Martin Mares <mj@....cz>,
	dean gaudet <dean@...tic.org>,
	Robert Richter <robert.richter@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86_64: set cfg_size for AMD Family 10h in case MMCONFIG is used

On Thursday 13 September 2007 12:47, Greg KH wrote:
> On Thu, Sep 13, 2007 at 11:47:42AM +0200, Andi Kleen wrote:
> > On Thursday 13 September 2007 04:21, Yinghai Lu wrote:
> > > [PATCH] x86_64: set cfg_size for AMD Family 10h in case MMCONFIG is
> > > used.
> > >
> > > reuse pci_cfg_space_size but skip check pci express and pci-x CAP ID.
> >
> > I just rejected a similar patch -- this should be done using MMCONFIG
>
> But what about for broken machines without the proper MMCONFIG entries?
> They still need a way to get access to this config space,

If there are any devices that need it. IBS and PCI-E error handling 
do, but they're quite obscure.

Also so far we don't know of any Fam 10h systems without MMCONFIG
entries. Fam10h requires a new BIOS so it's reasonable to assume
that the new BIOSes will do better.

-Andi
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