Re: [PATCH] x86/pci: try to detect host_bridge pci_cfg_space

[H. Peter Anvin]

Matthew Wilcox wrote:
> On Sun, Mar 08, 2009 at 12:04:37PM +0100, Ingo Molnar wrote:
>> I'd also suggest to flip around the subject line from x86/pci to 
>> pci/x86 - it's more of a PCI patch than a pure x86 patch. The 
>> same problem could affect other platforms too i suspect.
> 
> Not all platforms expose the root bridge in PCI configuration space.
> Intel ia64 platforms do have a materialised root bridge; HP's don't.
> (I don't know whether Intel ship any PCIe ia64 machines or not).  I
> don't remember details for other platforms, but I think Intel is the odd
> one out in this regard.
> 

It's still generic PCI code, however.  If there is no host bridge
exposed in PCI space, the patch is a noop.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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