x86: apic_is_clustered_box for vsmp

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quad core 8 socket system will have apic id lifting.the apic id range could
be [4, 0x23]. and apic_is_clustered_box will think that need to three clusters
and that is larger than 2. So it is treated as a clustered_box.

and will get:

   Marking TSC unstable due to TSCs unsynchronized

even if the CPUs have X86_FEATURE_CONSTANT_TSC set.

this quick fix will check if the cpu is from AMD.

but vsmp still needs that checking...

this patch is fix to make sure that vsmp not to be passed.

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

...

This commit is contained in:

Yinghai Lu 2008-02-24 21:36:28 -08:00 • committed by Ingo Molnar

parent 34048c9e92

commit f8fffa4583

3 changed files with 28 additions and 8 deletions

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4

arch/x86/kernel/apic_64.c

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27

arch/x86/kernel/vsmp_64.c

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5

include/asm-x86/apic.h

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