Re: [patch] Make MMCONFIG space (extended PCI config space) a driveropt-in issue
From: H. Peter Anvin
Date: Sun Dec 23 2007 - 01:04:50 EST
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
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