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| author | Jeremy Compostella <jeremy.compostella@intel.com> | 2022-09-14 11:06:06 -0700 |
|---|---|---|
| committer | Martin Roth <martin.roth@amd.corp-partner.google.com> | 2022-09-20 08:06:50 +0000 |
| commit | 92d38997906be4b1b7b91e2a4d007b09a24419c1 (patch) | |
| tree | a80bd58854720334ab171452b12f8caf5e47ee0d /Documentation/mainboard/lenovo/x2xx_series.md | |
| parent | c9933b2c277258fdb1a5359b426c5089af0e3cf8 (diff) | |
soc/intel/alderlake: Explicitly disable Energy Efficiency Turbo
FSP silicon 3347 changed the default value of the EnergyEfficientTurbo
Updateable Product Data (UPD), enabling the Energy Efficient Turbo
feature by default. This feature prevents the cores from entering
Turbo frequency under heavy load.
As a result of this FSP change, coreboot explicitly disables this
feature to stay consistent with commit `caa5f59279e Revert
"soc/intel/alderlake: Enable energy efficiency turbo mode"'.
BRANCH=firmware-brya-14505.B
BUG=b:246831841
TEST=verify that bit 19 of MSR 0x1fc is set. 'iotools rdmsr 0 0x1fc'
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Change-Id: I7498f87eb4be666b34cfccd0449a2b67a92eb9db
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67650
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Diffstat (limited to 'Documentation/mainboard/lenovo/x2xx_series.md')
0 files changed, 0 insertions, 0 deletions