>
> On Fri, Jul 11, 2008 at 04:13:47PM -0500, John Keller wrote:
> > On x86 PCI Config space access to domains/segments > 0 appears to be broken.
> > The noted patch related to PCI ext config space has all config accesses
> > to offsets < 256 using conf1 if available, which is most likely the case.
> >
> > This would force usage of conf1 for non-extended config access (< 256) on
> > PCI domains > 0.
> >
> > Am I missing something, or how would a conf1 access reference a domain
> > other than zero?
>
> You're correct. Sorry about that, I wasn't thinking about domains at
> the time I wrote the patch. Try this:
Yup, just what we were thinking.
Works fine.
Acked-by: John Keller <jpk@xxxxxxx>
>
> [X86] Fix PCI config space for domains > 0
>
> John Keller reports that PCI config space access is broken on machines
> with more than one domain. conf1 accesses only work for domain 0.
>
> Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
>
> diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
> index 6e64aaf..fe33533 100644
> --- a/arch/x86/pci/common.c
> +++ b/arch/x86/pci/common.c
> @@ -31,7 +31,7 @@ struct pci_raw_ops *raw_pci_ext_ops;
> int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
> int reg, int len, u32 *val)
> {
> - if (reg < 256 && raw_pci_ops)
> + if (domain == 0 && reg < 256 && raw_pci_ops)
> return raw_pci_ops->read(domain, bus, devfn, reg, len, val);
> if (raw_pci_ext_ops)
> return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val);
> @@ -41,7 +41,7 @@ int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
> int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
> int reg, int len, u32 val)
> {
> - if (reg < 256 && raw_pci_ops)
> + if (domain == 0 && reg < 256 && raw_pci_ops)
> return raw_pci_ops->write(domain, bus, devfn, reg, len, val);
> if (raw_pci_ext_ops)
> return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val);
>
> --
> Intel are signing my paycheques ... these opinions are still mine
> "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."
>
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