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Differential D52187

arm64: Add a function to check a range of CPU revs
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Authored by andrew on Aug 27 2025, 5:02 PM.
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manu
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arm64
Commits
rG7cd4ec4adb8f: arm64: Add a function to check a range of CPU revs
rGc76b0247a95e: arm64: Add a function to check a range of CPU revs
Summary

Add a function that can check if a given midr is within a range of
revisions. This will be used to check if a CPU is affected by a known
erratum.

Sponsored by: Arm Ltd

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rG FreeBSD src repository
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Tests Not Applicable

Event Timeline

andrew created this revision.Aug 27 2025, 5:02 PM
Herald added a reviewer: manu. · View Herald TranscriptAug 27 2025, 5:02 PM
Herald added subscribers: emaste, imp. · View Herald Transcript
Harbormaster completed remote builds in B66570: Diff 161051.Aug 27 2025, 5:02 PM
andrew requested review of this revision.Aug 27 2025, 5:02 PM
andrew added a parent revision: D52186: arm64: Cleanup enabling the MMU.
andrew added a child revision: D52188: arm64: Clean up HW DBM errata detection.
emaste added inline comments.Aug 27 2025, 5:07 PM
sys/arm64/include/cpu.h
199

This guard seems a little surprising to me

andrew added inline comments.Aug 27 2025, 6:02 PM
sys/arm64/include/cpu.h
199

It should be #if !defined(__ASSEMBLER__). It's needed because we include this file in locore.S for CPU_AFF_MASK (and possibly others)

This revision was not accepted when it landed; it landed in state Needs Review.Sep 4 2025, 4:47 PM
Closed by commit rGc76b0247a95e: arm64: Add a function to check a range of CPU revs (authored by andrew). · Explain Why
This revision was automatically updated to reflect the committed changes.
andrew added a commit: rGc76b0247a95e: arm64: Add a function to check a range of CPU revs.
andrew added a commit: rG7cd4ec4adb8f: arm64: Add a function to check a range of CPU revs.Jan 15 2026, 2:51 PM

Revision Contents
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PathSize
sys/
arm64/
include/
25 lines

Diff 161527

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sys/arm64/include/cpu.h

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