Re: [patch] Make MMCONFIG space (extended PCI config space) a driver opt-in issue

H. Peter Anvin
2007-12-23T06:04:49Z

Jeff Garzik wrote:
>
> 2) It is legal for PCI-Express to put capabilities anywhere in PCI
> config space, including extended config space. (I hope our PCI cap
> walking code checks for overruns...)
>

Uh, not really. The classical capability format only has 8-bit
addresses, and the spec requires that all extended config space that is
used be claimed by extended capabilities -- a different format chain.

-hpa