Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona

Arne Georg Gleditsch
2007-09-05T11:27:21Z

"H. Peter Anvin" <hpa@zytor.com> writes:
> You're missing the point. How will the PCI bus transactions be
> different when using MMCONFIG versus your extended CF8 version?

Conceivably this is useful if the IO hub does not support MMCONFIG
accesses. The AMD 8111 does not, as far as I can see. At least I
have an Opteron system where MMCONFIG is not supported, and I assume
it's because the 8111 doesn't provide it. I don't know if this is
going to be a realistic scenario for Barcelona systems.

--
Arne.