x86: if acpi=off, force setting the mmconf for fam10h

Browse source

some BIOS only let AMD fam 10h handle bus0, and nvidia mcp55/ck804
to handle other buses. at that case MCFG will cover all over them.

but with acpi=off, we can not use MCFG. this patch will double check
the busnbits, and if it is less handling 256 bues, and acpi=off
will forcely reset the mmconf in msr, so we still use mmconf in above case.

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

...

This commit is contained in:

Yinghai Lu 2008-02-25 18:41:35 -08:00 • committed by Ingo Molnar

parent 7fd0da4085

commit d4c4d09415

1 changed files with 15 additions and 8 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

23

arch/x86/kernel/setup_64.c

View file