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Date:      Wed, 10 Feb 2021 18:08:25 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 253288] hwpstate_intel: Wedges under any kind of load on ThinkPad Carbon X1 Gen 8
Message-ID:  <bug-253288-227-FzBdGsvKMy@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-253288-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-253288-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D253288

--- Comment #12 from Sreehari S <sreeharisreedev1@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 th=
at
matters too much. The only thing I can think of that would cause the differ=
ence
is MSR reading/writing stuff, but I'm no expert on this honestly, and I cou=
ld
be completely wrong for all I know.

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