[Bug 253288] hwpstate_intel: Wedges under any kind of load on ThinkPad Carbon X1 Gen 8

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253288

--- Comment #12 from Sreehari S <sreeharisreedev1 at gmail.com> ---
(In reply to Ed Maste from comment #11)
Yeah, that makes sense. The linux driver is available in their kernel tree at
drivers/cpufreq/intel_pstate.c
(https://github.com/torvalds/linux/blob/master/drivers/cpufreq/intel_pstate.c).
The first commit that added HWP in the linux kernel tree was
2f86dc4cddcb21290ca099e1dce2a53533c86e0b from 2014, though I don't think that
matters too much. The only thing I can think of that would cause the difference
is MSR reading/writing stuff, but I'm no expert on this honestly, and I could
be completely wrong for all I know.

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