arm: Support the optional limitation on dsb/dmb
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Authored by andrew on Nov 11 2025, 5:28 PM.

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Summary

The dsb and dmb instructions support an optional limitation on what
shareability domains an memory operations they target. Historically
FreeBSD/arm didn't have a way to specify the limit.

Use a variadic macro to take the optional limitation and pass it
through to the instruction.

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Repository

rG FreeBSD src repository

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Build Status

Buildable 68549
Build 65432: arc lint + arc unit

Event Timeline

andrew created this revision.Nov 11 2025, 5:28 PM

Herald added a subscriber: imp. · View Herald TranscriptNov 11 2025, 5:28 PM

andrew requested review of this revision.Nov 11 2025, 5:28 PM

Harbormaster completed remote builds in B68549: Diff 166252.Nov 11 2025, 5:28 PM

Revision Contents
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Path

Size

sys/

arm/

include/

atomic.h

6 line(s)

Diff 166252

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arm: Support the optional limitation on dsb/dmbNeeds ReviewPublicActions