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Differential D55051

arm64: Add MOPS implementations of memset(), memcpy() and memmove()
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Authored by sarah.walker2_arm.com on Feb 2 2026, 10:02 AM.
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Reviewers
andrew
manu
Commits
rG44d6e17c86cf: arm64: Add MOPS implementations of memset(), memcpy() and memmove()
rG2ccbf06c0285: arm64: Add MOPS implementations of memset(), memcpy() and memmove()
Summary

Enable the use of MOPS implementations of memset, memcpy and memmove within
the kernel. Fix pre-ifunc resolution uses of these functions.

Sponsored by: Arm Ltd

Diff Detail

Repository
rG FreeBSD src repository
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Build Status
Buildable 70577
Build 67460: arc lint + arc unit

Event Timeline

sarah.walker2_arm.com created this revision.Feb 2 2026, 10:02 AM
Herald added a reviewer: andrew. · View Herald TranscriptFeb 2 2026, 10:02 AM
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.Feb 2 2026, 10:02 AM
Harbormaster completed remote builds in B70341: Diff 170975.Feb 2 2026, 10:02 AM
sarah.walker2_arm.com mentioned this in D54943: arm64: Enable MOPS usage in the kernel.Feb 2 2026, 10:02 AM
andrew added a comment.Feb 3 2026, 11:22 AM

I think we will need to also update the calls to memset/bzero in pmap_bootstrap_*. These functions are used by the kernel sanitizers to build the early shadow region.

andrew mentioned this in D55075: kern linker: Mark link_elf_ireloc as no-KASAN.Feb 3 2026, 12:29 PM
sarah.walker2_arm.com updated this revision to Diff 171508.Feb 9 2026, 11:52 AM

Remove mops_supported.

Harbormaster completed remote builds in B70542: Diff 171508.Feb 9 2026, 11:52 AM
andrew added a comment.Feb 9 2026, 5:39 PM

It looks like this is missing the pmap changes for the sanitizer kernels.

sarah.walker2_arm.com updated this revision to Diff 171633.Feb 10 2026, 9:58 AM

KASAN fixes.

Herald added a subscriber: olce. · View Herald TranscriptFeb 10 2026, 9:58 AM
Harbormaster completed remote builds in B70577: Diff 171633.Feb 10 2026, 9:59 AM
andrew accepted this revision.Feb 10 2026, 3:26 PM
This revision is now accepted and ready to land.Feb 10 2026, 3:26 PM
Closed by commit rG2ccbf06c0285: arm64: Add MOPS implementations of memset(), memcpy() and memmove() (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: rG2ccbf06c0285: arm64: Add MOPS implementations of memset(), memcpy() and memmove().
andrew added a commit: rG44d6e17c86cf: arm64: Add MOPS implementations of memset(), memcpy() and memmove().Apr 8 2026, 2:01 PM

Revision Contents
Changeset List

PathSize
sys/
arm64/
arm64/
5 lines
38 lines
2 lines
24 lines
12 lines
10 lines
include/
7 lines
kern/
2 lines
4 lines
2 lines

Diff 171633

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sys/arm64/arm64/identcpu.c

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sys/arm64/arm64/machdep.c

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sys/arm64/arm64/machdep_boot.c

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sys/arm64/arm64/memcpy.S

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sys/arm64/arm64/memset.S

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sys/arm64/arm64/pmap.c

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sys/arm64/include/cpu.h

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sys/kern/link_elf.c

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sys/kern/subr_asan.c

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sys/kern/subr_msan.c

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