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Differential D57759

x86: add AMD RAPL MSR and feature-bit definitions
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Authored by afscoelho_gmail.com on Jun 23 2026, 2:36 AM.
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F166767883: D57759.diff
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imp

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ali_mashtizadeh.com
imp
mhorne
Summary

Define AMDPM_RAPL bit (CPUID 8000_0007 EDX) and three AMD RAPL MSRs:
RAPL_POWER_UNIT (unit shifts), CORE_ENERGY_STATUS (per-core energy),
PKG_ENERGY_STATUS (package energy). Used by AMD RAPL driver added next.

Sponsored by: Advanced Micro Devices (AMD)
MFC after: 2 weeks
Signed-off-by: Andre Silva <andasilv@amd.com>

Diff Detail

Repository
rG FreeBSD src repository
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Lint Skipped
Unit
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Build Status
Buildable 74129
Build 71012: arc lint + arc unit

Event Timeline

afscoelho_gmail.com created this revision.Jun 23 2026, 2:36 AM
Herald added a subscriber: imp. · View Herald TranscriptJun 23 2026, 2:36 AM
afscoelho_gmail.com requested review of this revision.Jun 23 2026, 2:36 AM
Harbormaster completed remote builds in B74126: Diff 180341.Jun 23 2026, 2:36 AM
afscoelho_gmail.com added a parent revision: D57758: x86: add cpu_get_pkg_id() and cpu_get_core_id() topology helpers.Jun 23 2026, 2:36 AM
afscoelho_gmail.com added a child revision: D57760: amdrapl: add AMD RAPL energy/power telemetry driver.
afscoelho_gmail.com updated this revision to Diff 180344.Jun 23 2026, 2:50 AM

Correct stack onto D55603 and add Co-authored-by trailer for ShengYi Hung.

Harbormaster completed remote builds in B74129: Diff 180344.Jun 23 2026, 2:50 AM
afscoelho_gmail.com added a child revision: D55603: amdrapl: Introduce amdrapl driver.Jun 23 2026, 2:50 AM
afscoelho_gmail.com mentioned this in D55603: amdrapl: Introduce amdrapl driver.
afscoelho_gmail.com mentioned this in D57760: amdrapl: add AMD RAPL energy/power telemetry driver.
afscoelho_gmail.com removed a child revision: D57760: amdrapl: add AMD RAPL energy/power telemetry driver.
ali_mashtizadeh.com added a reviewer: ali_mashtizadeh.com.Jun 25 2026, 3:36 PM
ali_mashtizadeh.com accepted this revision.Jun 25 2026, 4:43 PM
This revision is now accepted and ready to land.Jun 25 2026, 4:43 PM
ali_mashtizadeh.com added reviewers: imp, mhorne.Jun 25 2026, 4:43 PM
aokblast mentioned this in D58027: x86: add AMD RAPL MSR definitions to specialreg.h.Sat, Jul 25, 1:45 PM
afscoelho_gmail.com abandoned this revision.Fri, Jul 31, 4:28 PM

Abandoning: superseded by D58027, which adds the identical three AMD RAPL MSR definitions to specialreg.h and has already landed. The AMDPM_RAPL feature bit from this change is unnecessary in the merged design, which detects RAPL via runtime rdmsr_safe() probing rather than a CPUID feature bit.

Revision Contents
Changeset List

PathSize
sys/
x86/
include/
4 lines

Diff 180344

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sys/x86/include/specialreg.h

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