Re: [patch 0/2] PCI: improve extended config space verification

[Jeff Garzik]

rajesh.shah@xxxxxxxxx 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


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