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Revert "x86, AMD: Fix APIC timer erratum 400 affecting K8 Rev.A-E processors"

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commit 328935e634 upstream.

This reverts commit e20a2d205c, as it crashes
certain boxes with specific AMD CPU models.

Moving the lower endpoint of the Erratum 400 check to accomodate
earlier K8 revisions (A-E) opens a can of worms which is simply
not worth to fix properly by tweaking the errata checking
framework:

* missing IntPenging MSR on revisions < CG cause #GP:

http://marc.info/?l=linux-kernel&m=130541471818831

* makes earlier revisions use the LAPIC timer instead of the C1E
idle routine which switches to HPET, thus not waking up in
deeper C-states:

http://lkml.org/lkml/2011/4/24/20

Therefore, leave the original boundary starting with K8-revF.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Borislav Petkov
2011-05-17 14:55:18 +02:00
committed by Greg Kroah-Hartman
parent 46042172f1
commit 88c38c2bcb
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/cpu/amd.c
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@@ -653,7 +653,7 @@ cpu_dev_register(amd_cpu_dev);
*/
const int amd_erratum_400[] =
AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0x0f, 0x4, 0x2, 0xff, 0xf),
AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0xf, 0x41, 0x2, 0xff, 0xf),
AMD_MODEL_RANGE(0x10, 0x2, 0x1, 0xff, 0xf));