x86_64: check and enable MMCONFIG for AMD Family 10h

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So we can use MMCONF when MMCONF is not set by BIOS

using TOP_MEM2 msr to get memory top, and try to scan fam10h mmio routing to
make sure the range is not conflicted with some prefetch MMIO that is above 4G.
(current only LinuxBIOS assign 64 bit mmio above 4G for some co-processor)

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Yinghai Lu 2008-02-19 03:13:43 -08:00 • committed by Ingo Molnar

parent 57741a7790

commit eee206c3bf

1 changed files with 204 additions and 0 deletions

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arch/x86/kernel/setup_64.c

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