Messages in this thread Patch in this message | | | From | Borislav Petkov <> | Subject | [PATCH 1/2] Revert "x86, AMD: Fix APIC timer erratum 400 affecting K8 Rev.A-E processors" | Date | Tue, 17 May 2011 14:55:18 +0200 |
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From: Borislav Petkov <borislav.petkov@amd.com>
This reverts commit e20a2d205c05cef6b5783df339a7d54adeb50962.
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. --- arch/x86/kernel/cpu/amd.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index bb9eb29..3532d3b 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -698,7 +698,7 @@ 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)); EXPORT_SYMBOL_GPL(amd_erratum_400); -- 1.7.4.rc2
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