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Differential D54947

arm64: Add MOPS implementations of copyin/copyout
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Authored by sarah.walker2_arm.com on Jan 29 2026, 6:25 PM.

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Reviewers

andrew
manu

Commits

rG1224347817c4: arm64: Add MOPS implementations of copyin/copyout

Summary

Reimplement copyin() & copyout() as ifuncs.

Sponsored by: Arm Ltd

Diff Detail

Repository

rG FreeBSD src repository

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Build Status

Buildable 70340
Build 67223: arc lint + arc unit

Event Timeline

sarah.walker2_arm.com created this revision.Jan 29 2026, 6:25 PM

Herald added a reviewer: andrew. · View Herald TranscriptJan 29 2026, 6:25 PM

Herald added a reviewer: andrew. · View Herald Transcript

Herald added a reviewer: manu. · View Herald Transcript

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

sarah.walker2_arm.com requested review of this revision.Jan 29 2026, 6:25 PM

sarah.walker2_arm.com added a parent revision: D54946: arm64: Add MOPS implementation of pagezero().

Harbormaster completed remote builds in B70214: Diff 170737.Jan 29 2026, 6:26 PM

andrew added inline comments.Jan 30 2026, 11:18 AM

sys/arm64/arm64/copyinout.S
90	You can use `cpyfrt` and `cpyfwt` directly to implement copyin & copyout. As they execute the load/store as unprivileged operations you will need to set the fault handler, but don't need to enable user access.

Address review comments.

Harbormaster completed remote builds in B70231: Diff 170773.Jan 30 2026, 12:27 PM

andrew accepted this revision.Jan 30 2026, 1:23 PM

This revision is now accepted and ready to land.Jan 30 2026, 1:23 PM

Address review comments.

This revision now requires review to proceed.Feb 2 2026, 10:01 AM

Harbormaster completed remote builds in B70340: Diff 170974.Feb 2 2026, 10:01 AM

andrew accepted this revision.Feb 3 2026, 1:49 PM

This revision is now accepted and ready to land.Feb 3 2026, 1:49 PM

Remove mops_supported.

This revision now requires review to proceed.Feb 9 2026, 11:52 AM

Harbormaster completed remote builds in B70544: Diff 171510.Feb 9 2026, 11:52 AM

andrew accepted this revision.Feb 9 2026, 5:31 PM

This revision is now accepted and ready to land.Feb 9 2026, 5:31 PM

Closed by commit rG1224347817c4: arm64: Add MOPS implementations of copyin/copyout (authored by sarah.walker2_arm.com, committed by andrew). · Explain WhyFeb 10 2026, 3:43 PM

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG1224347817c4: arm64: Add MOPS implementations of copyin/copyout.

Revision Contents
Changeset List

Path

Size

sys/

arm64/

arm64/

58 lines

copyinout_ifunc.c

48 lines

conf/

1 line

Diff 170974

sys/arm64/arm64/copyinout.S

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sys/arm64/arm64/copyinout_ifunc.c

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sys/conf/files.arm64

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