aacd548c26
The datasheets "Intel® Core™ Duo Processor and Intel® Core™ Solo Processor on 65 nm Process" mentions cpu C-states substates which can either be attained by adding a substate hint to the MWAIT/P_LVLx request or automatically by setting some msr bits correctly. This just sets the same msr bits as model_6fx to enable dynamic L2 cache, C2E and C4E acpi cpu states. The result is that when limiting a thinkpad x60 with a yonah T2400 cpu to the acpi cpu C2 state, the idle power usage drops from 18W to 14W. When the lowest C-state is set to C4 the idle power usage seems to remain similar. Change-Id: I6c422656ace04659f32082a5944617eda6c79ec3 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/16901 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com> |
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