[coreboot-gerrit] Patch merged into coreboot/master: 31ac9e3 baytrail: Configure MSR for 2-core and 4-core P-state configutation

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit 31ac9e3a9a53523ad342af55b9a20c3c51cd927a
Author: Duncan Laurie <dlaurie at chromium.org>
Date:   Fri Mar 28 10:52:13 2014 -0700

    baytrail: Configure MSR for 2-core and 4-core P-state configutation
    
    Suggested settings to try for performace regression:
    
    2-core systems:
    - MSR_PMG_CST_CONFIG_CONTROL clear bit 11 (SINGLE_PCTL)
    - MSR_POWER_MISC clear bit 2,3
    - \_PR.CPUx._PSD coordination set to 0xFE (HW_ALL)
    
    4-core systems:
    - MSR_PMG_CST_CONFIG_CONTROL clear bit 11 (SINGLE_PCTL)
    - MSR_POWER_MISC clear bit 2,3
    - \_PR.CPUx._PSD coordination set to 0xFC (SW_ALL)
    
    BUG=chrome-os-partner:26211
    BRANCH=baytrail
    TEST=emerge-rambi chromeos-coreboot-rambi
    
    Change-Id: Ib68a86525204ae47a820c269257a7b8df9300a6a
    Signed-off-by: Duncan Laurie <dlaurie at chromium.org>
    Reviewed-on: https://chromium-review.googlesource.com/192573
    Tested-by: Shawn Nematbakhsh <shawnn at chromium.org>
    Commit-Queue: Shawn Nematbakhsh <shawnn at chromium.org>
    (cherry picked from commit 8c8c0be0000043610eaa56926eff978f352819b8)
    Signed-off-by: Marc Jones <marc.jones at se-eng.com>
    Reviewed-on: http://review.coreboot.org/7213
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi <pgeorgi at google.com>


See http://review.coreboot.org/7213 for details.

-gerrit