amdrapl: Introduce amdrapl driver
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Authored by aokblast on Mar 1 2026, 11:21 AM.

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rG FreeBSD src repository

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Buildable 71128
Build 68011: arc lint + arc unit

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aokblast created this revision.Mar 1 2026, 11:21 AM

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aokblast requested review of this revision.Mar 1 2026, 11:21 AM

Harbormaster completed remote builds in B71110: Diff 172960.Mar 1 2026, 11:21 AM

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Harbormaster completed remote builds in B71111: Diff 172962.Mar 1 2026, 12:01 PM

Quick response:

also need to add to sys/modules/Makefile
Do you have a plan to write a short man page?

Fix Makefile and use recursive lock to make witness happy

Harbormaster completed remote builds in B71128: Diff 172997.Mar 2 2026, 8:34 AM

In D55603#1272290, @lwhsu wrote:

Quick response:

also need to add to sys/modules/Makefile

Do you have a plan to write a short man page?

Sure, but I am thinking about creating a uniform monitor interface for kernel sensors that can also be used by amdtemp and coretemp driver. So the sysctl may chages.

Hi @aokblast, I've found your rapl driver for amd and I'm interested in continuing the work. It's been sitting since March and I'd like to pick it up. Are you still planning to work on it, or would you be OK with me taking over? Thanks

In D55603#1311570, @afscoelho_gmail.com wrote:

Hi @aokblast, I've found your rapl driver for amd and I'm interested in continuing the work. It's been sitting since March and I'd like to pick it up. Are you still planning to work on it, or would you be OK with me taking over? Thanks

Hi, according to the PPR. This is all we can do for the Zen5 pre CPUs. The mailbox based features require AMD AI series CPU or Zen5 EPYC, which I am unable to test and debug. So don't hesitate to take this task.

Notice: I don't know whether we will merge this feature as RAPL has some known security flaws.