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Differential D55475

acpi: Support Functional Fixed Hardware
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Authored by aokblast on Feb 24 2026, 7:25 AM.
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imp
olce

Details

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olce
Summary

ACPI Functional Fixed Hardware is a address space defined in ACPI
GAS (Generic Address Space). This implementation relies on CPU
manufacturer to define specific hardware instruction to access. We
add it to our kernel resource management system.

Diff Detail

Repository
rG FreeBSD src repository
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Lint Passed
Unit
No Test Coverage
Build Status
Buildable 74242
Build 71125: arc lint + arc unit

Event Timeline

aokblast created this revision.Feb 24 2026, 7:25 AM
Herald added subscribers: olce, imp. · View Herald TranscriptFeb 24 2026, 7:25 AM
aokblast requested review of this revision.Feb 24 2026, 7:25 AM
Harbormaster completed remote builds in B70942: Diff 172562.Feb 24 2026, 7:25 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.
aokblast updated this revision to Diff 172665.Feb 25 2026, 10:43 AM

Mark FFH resource as 1 byte to prevent resource overlap

Harbormaster completed remote builds in B70987: Diff 172665.Feb 25 2026, 10:43 AM
aokblast added a child revision: D55505: acpi_perf: Mark readonly when using FFH.Feb 25 2026, 10:45 AM
aokblast updated this revision to Diff 172845.Feb 27 2026, 7:12 AM

Use uint64_t instead of platform dependent register_t

Harbormaster completed remote builds in B71060: Diff 172845.Feb 27 2026, 7:12 AM
aokblast added a child revision: D57825: hwpstate_amd: Detect ACPI _CPC object to enable CPPC.Jun 24 2026, 6:25 PM
aokblast updated this revision to Diff 180615.Jun 25 2026, 1:18 PM

Minor fixes

Harbormaster completed remote builds in B74242: Diff 180615.Jun 25 2026, 1:18 PM
olce requested changes to this revision.Jul 10 2026, 3:06 PM

acpi_get_rman() should always return NULL on FFH, and it's absolutely inconceivable to match devices on FFH values.

Same as for D55476 here, this change should be dropped.

This revision now requires changes to proceed.Jul 10 2026, 3:06 PM
aokblast abandoned this revision.Jul 12 2026, 5:19 AM

Revision Contents
Changeset List

PathSize
sys/
dev/
acpica/
31 lines
2 lines
kern/
6 lines

Diff 180615

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sys/dev/acpica/acpi.c

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sys/dev/acpica/acpivar.h

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sys/kern/subr_bus.c

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