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Summary:Add definitions for Intel Speed Shift
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Authored by bwidawsk on Nov 19 2018, 7:43 PM.

Details

Summary

These definitions will be used by a driver to implement Hardware
P-States (autonomous control of HWP, via Intel Speed Shift technology).

This is split out from the original RFC patch D18028.

Test Plan

N/A

Diff Detail

Repository
rS FreeBSD src repository - subversion
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

bwidawsk retitled this revision from Summary: Add definitions for Intel Speed Shift to Summary:Add definitions for Intel Speed Shift.Nov 19 2018, 7:43 PM
bwidawsk added a subscriber: scottph.

I think it is useful to add the decoding of CPUID.6 info identcpu.c, since we start to rely on many bits from there.

sys/x86/include/specialreg.h
557 ↗(On Diff #50612)

PECI is not listed in SDM, BTW.

This revision is now accepted and ready to land.Nov 20 2018, 9:30 AM
bwidawsk added inline comments.
sys/x86/include/specialreg.h
557 ↗(On Diff #50612)

Ha. Well, I don't think there is much point in keeping that definition then.

This revision was automatically updated to reflect the committed changes.