[PATCH] x86_64: Work around another aperture BIOS bug on Opteron

[PATCH] x86_64: Work around another aperture BIOS bug on Opteron

Work around another aperture BIOS bug on Opteron

Based on debugging&code from Vincent ETIENNE <ve@vetienne.net>

>>
I have some problem with AGP initialization with my board : IWILL DK8N (Bi
opteron chipset NFORCE3 ). I use kernel 2.6.10-rc3-mm1, but i have try with

IOMMU reports a 128MB aperture for CPU0 ( that's the value i used in my bios)
at F0000000 but only 32MB at 4000000 for CPU1
<<

This patch checks for this condition and fixes the other CPUs up.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>