x86: Implement Functional Fixed Hardware in SYS_RES
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Authored by aokblast on Feb 24 2026, 7:27 AM.

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Summary

The ACPI functional fixed hardware in x86 is defined as reading MSR.
Implement it by using our generic bus_read interface.

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Repository

rG FreeBSD src repository

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Lint Passed

Unit

No Test Coverage

Build Status

Buildable 74243
Build 71126: arc lint + arc unit

Event Timeline

aokblast created this revision.Feb 24 2026, 7:27 AM

Herald added a subscriber: imp. · View Herald TranscriptFeb 24 2026, 7:27 AM

aokblast requested review of this revision.Feb 24 2026, 7:27 AM

Harbormaster completed remote builds in B70943: Diff 172563.Feb 24 2026, 7:27 AM

aokblast added a child revision: D55477: hwpstate_amd: Support writable cpufreq interface in CPPC mode.Feb 24 2026, 7:31 AM

aokblast added a reviewer: olce.

Don't implement FFH in generic bus driver since it is not widely used.

Harbormaster completed remote builds in B71059: Diff 172844.Feb 27 2026, 7:11 AM

aokblast added a child revision: D57825: hwpstate_amd: Detect ACPI _CPC object to enable CPPC.Wed, Jun 24, 6:25 PM

Minor fixes

Harbormaster completed remote builds in B74243: Diff 180616.Thu, Jun 25, 1:18 PM

Revision Contents
Changeset List

Path

Size

sys/

amd64/

include/

resource.h

1 line

conf/

files.amd64

1 line

x86/

acpica/

acpi_cppc_platform.c

65 lines

include/

bus.h

72 lines

x86/

nexus.c

23 lines

Diff 180616

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sys/amd64/include/resource.h

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sys/conf/files.amd64

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sys/x86/acpica/acpi_cppc_platform.c

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sys/x86/include/bus.h

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x86: Implement Functional Fixed Hardware in SYS_RESNeeds ReviewPublicActions

Details

Diff Detail

Event Timeline

Revision ContentsChangeset List

Diff 180616

sys/amd64/include/resource.h

sys/conf/files.amd64

sys/x86/acpica/acpi_cppc_platform.c

sys/x86/include/bus.h

sys/x86/x86/nexus.c

x86: Implement Functional Fixed Hardware in SYS_RES
Needs ReviewPublic
Actions

Revision Contents
Changeset List