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

Yinghai Lu
2007-09-06T17:50:30Z

On 9/6/07, Jesse Barnes <jesse.barnes@intel.com> wrote:
> The problem with doing that is it would mean reserving some address
> space for mmconfig usage. If the BIOS doesn't completely describe all
> the reserved regions via e820 or similar (apparently a common problem)
> we may end up making mmconfig overlap with another important area...
> It's pretty hard not to trust the BIOS here without completely
> replacing big chunks of it.

for Family 10h, you can use mmio range high beyond than the RAM
range...( just don't conflict with HT reserved range...)

YH