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authorCole Nelson <colex.nelson@intel.com>2017-05-16 11:38:59 -0700
committerAaron Durbin <adurbin@chromium.org>2018-04-09 17:49:18 +0000
commitf357c2562ac2b27f2520e8591a27001f39dc7e92 (patch)
tree2f114b96d02f600b65d96d2e6b079f8368ef16bd /src/cpu/intel
parentb10e96f1969bf7ab1a4c83abc484aa4873af950e (diff)
soc/intel/apollolake: enable MONITOR/MWAIT for GLK
MONITOR/MWAIT had an irremediable hardware bug for Apollolake. This has been fixed for GLK. Therefore, make MONITOR/MWAIT based C-states the default for GLK and disable IO-Redirection based C-states used for Apollolake. Tested on GLK w/kernel 4.14.27 using turbostat to observe C-state residencies with and without load. Tested for S0ix entry and exit using: "echo freeze > /sys/power/state" and "suspend_stress_test -c 500". BUG=b:77639897 Change-Id: If648c25a9b26c04b278dce4af241d439790288ca Signed-off-by: Cole Nelson <colex.nelson@intel.com> Signed-off-by: Venkateswarlu Vinjamuri <venkateswarlu.v.vinjamuri@intel.com> Reviewed-on: https://review.coreboot.org/19718 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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