lkml.org 
[lkml]   [2011]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[17/24] Revert "x86, AMD: Fix APIC timer erratum 400 affecting K8 Rev.A-E processors"
    2.6.33-longterm review patch.  If anyone has any objections, please let us know.

    ------------------
    Content-Length: 1302
    Lines: 43

    From: Borislav Petkov <borislav.petkov@amd.com>

    commit 328935e6348c6a7cb34798a68c326f4b8372e68a upstream.

    This reverts commit e20a2d205c05cef6b5783df339a7d54adeb50962, 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>

    ---
    arch/x86/kernel/cpu/amd.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/arch/x86/kernel/cpu/amd.c
    +++ b/arch/x86/kernel/cpu/amd.c
    @@ -651,7 +651,7 @@ 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));





    \
     
     \ /
      Last update: 2011-05-19 20:35    [W:4.147 / U:0.936 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site