Differential D50572

arm64: Add a function to restrict the ID registers
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Authored by andrew on May 28 2025, 1:41 PM.

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Reviewers

manu

Group Reviewers

arm64

Commits

rG2aeac25bcb72: arm64: Add a function to restrict the ID registers

Summary

This will be used when we need to restrict the register values, e.g.
when an erratum is present that means we need to disable a feature we
will need to remove some fields from these registers.

Diff Detail

Repository

rG FreeBSD src repository

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Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

andrew created this revision.May 28 2025, 1:41 PM

Herald added a reviewer: manu. · View Herald TranscriptMay 28 2025, 1:41 PM

Herald added subscribers: emaste, imp. · View Herald Transcript

andrew requested review of this revision.May 28 2025, 1:41 PM

Harbormaster completed remote builds in B64499: Diff 156188.May 28 2025, 1:41 PM

andrew added a parent revision: D50571: arm64: Move users of sanitised ID registers later.May 28 2025, 1:41 PM

andrew added a child revision: D50573: arm64: Mask out the PAC ID fields when disabled.

This revision was not accepted when it landed; it landed in state Needs Review.Jun 2 2025, 10:42 AM

Closed by commit rG2aeac25bcb72: arm64: Add a function to restrict the ID registers (authored by andrew). · Explain Why

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG2aeac25bcb72: arm64: Add a function to restrict the ID registers.

Revision Contents
Changeset List

Path

Size

sys/

arm64/

identcpu.c

131 lines

include/

cpu.h

1 line

Diff 156413

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sys/arm64/arm64/identcpu.c