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authorDuncan Laurie <dlaurie@chromium.org>2014-03-28 10:52:13 -0700
committerMarc Jones <marc.jones@se-eng.com>2014-10-28 17:57:12 +0100
commit31ac9e3a9a53523ad342af55b9a20c3c51cd927a (patch)
tree2166177d25481b6ccf2e47e6617b16f2553f1e6b /src/mainboard/google/rambi
parent89f5292ee63cb6f387c06bfbdb4343cc675bc938 (diff)
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@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/192573 Tested-by: Shawn Nematbakhsh <shawnn@chromium.org> Commit-Queue: Shawn Nematbakhsh <shawnn@chromium.org> (cherry picked from commit 8c8c0be0000043610eaa56926eff978f352819b8) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Reviewed-on: http://review.coreboot.org/7213 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
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