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Differential D55954

arm64: Add vm_page_t MTE flags
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Authored by andrew on Mar 19 2026, 4:06 PM.
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emaste
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manu
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arm64
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rGbb9497a2d462: arm64: Add vm_page_t MTE flags
Summary

To track which pages have MTE tags. Add a flag field to md_page. We
can then use this in MD code to mark which pages have MTE tags.

Sponsored by: Arm Ltd

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Repository
rG FreeBSD src repository
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Unit
Tests Not Applicable

Event Timeline

andrew created this revision.Mar 19 2026, 4:06 PM
Herald added a reviewer: manu. · View Herald TranscriptMar 19 2026, 4:06 PM
Herald added subscribers: emaste, imp. · View Herald Transcript
andrew requested review of this revision.Mar 19 2026, 4:06 PM
Harbormaster completed remote builds in B71535: Diff 173924.Mar 19 2026, 4:06 PM
andrew added a parent revision: D55953: arm64: Add support for per-page flags.Mar 19 2026, 4:06 PM
andrew added a child revision: D55955: arm64: mte: copy/save tags on copy-on-write.
This revision was not accepted when it landed; it landed in state Needs Review.Wed, May 27, 3:24 PM
Closed by commit rGbb9497a2d462: arm64: Add vm_page_t MTE flags (authored by harry.moulton_arm.com, committed by andrew). · Explain Why
This revision was automatically updated to reflect the committed changes.
andrew added a commit: rGbb9497a2d462: arm64: Add vm_page_t MTE flags.

Revision Contents
Changeset List

PathSize
sys/
arm64/
arm64/
38 lines
1 line
include/
2 lines
3 lines

Diff 178739

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sys/arm64/arm64/mte.c

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sys/arm64/arm64/pmap.c

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sys/arm64/include/cpu.h

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sys/arm64/include/pmap.h

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