arm64: Mask out the PAC ID fields when disabled
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Authored by andrew on May 28 2025, 1:41 PM.

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manu

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arm64

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rG89bb17ec3b02: arm64: Mask out the PAC ID fields when disabled

Summary

When we disable PAC we need to mask out the ID registers for userspace.
Call update_special_reg to mask them out so userspace gets a correct
view of the registers and hwcaps.

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rG FreeBSD src repository

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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 B64500: Diff 156189.May 28 2025, 1:41 PM

andrew added a parent revision: D50572: arm64: Add a function to restrict the ID registers.May 28 2025, 1:41 PM

emaste added inline comments.May 28 2025, 1:44 PM

sys/arm64/arm64/ptrauth.c
107–108	`{}` for single statement bodies are fine but if we're going to add them for this case we should for the one above too

Remove unneeded braces

Harbormaster completed remote builds in B64546: Diff 156292.May 30 2025, 10:12 AM

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

Closed by commit rG89bb17ec3b02: arm64: Mask out the PAC ID fields when disabled (authored by andrew). · Explain Why

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG89bb17ec3b02: arm64: Mask out the PAC ID fields when disabled.

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sys/

arm64/

ptrauth.c

12 lines

Diff 156414

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arm64: Mask out the PAC ID fields when disabledClosedPublicActions