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

Matthew Wilcox
2009-03-08T14:58:32Z

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.

--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."