[coreboot] Patch merged into coreboot/master: dc278f8 haswell: Properly Guard Engergy Policy by CPUID

gerrit at coreboot.org gerrit at coreboot.org
Thu Mar 14 05:10:35 CET 2013

the following patch was just integrated into master:
commit dc278f8fd0318caf0c11330478dff8453bb1107d
Author: Aaron Durbin <adurbin at chromium.org>
Date:   Tue Dec 11 17:15:13 2012 -0600

    haswell: Properly Guard Engergy Policy by CPUID
    The IA32_ENERGY_PERFORMANCE_BIAS MSR can only be read or written
    to if the CPU supports it. The support is indicated by ECX[3] for
    cpuid(6). Without this guard, some Haswell parts would GP# fault
    in this routine.
    No more GP# while running on haswell CRBs.
    Change-Id: If41e1e133e5faebb3ed578cba60743ce7e1c196f
    Signed-off-by: Aaron Durbin <adurbin at chromium.org>
    Reviewed-on: http://review.coreboot.org/2639
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth <martin.roth at se-eng.com>

Build-Tested: build bot (Jenkins) at Tue Mar 12 01:53:20 2013, giving +1
See http://review.coreboot.org/2639 for details.


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