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Differential D50726

arm64: Add more CPU MIDR values
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Authored by andrew on Jun 6 2025, 5:21 PM.

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rG61d0cea4c00f: arm64: Workaround the following errata
rG935f00c4ddf6: arm64: Add more CPU MIDR values
rG124b5dbf5c09: arm64: Add more CPU MIDR values

Summary

Found in Linux and https://github.com/arm-software/data

Sponsored by: Arm Ltd

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rG FreeBSD src repository

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Event Timeline

andrew created this revision.Jun 6 2025, 5:21 PM

Herald added a reviewer: manu. · View Herald TranscriptJun 6 2025, 5:21 PM

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

andrew requested review of this revision.Jun 6 2025, 5:21 PM

Harbormaster completed remote builds in B64685: Diff 156646.Jun 6 2025, 5:21 PM

bcran added a subscriber: bcran.Jun 6 2025, 8:57 PM

bcran added inline comments.

sys/arm64/arm64/identcpu.c
262	To be consistent, "AmpereOne" should probably be "AmpereOne AC03", and "AmpereOne-1A" should be "AmpereOne AC04". There will also be an "AmpereOne AC04_1". For example, see https://amperecomputing.com/tutorials/gcc-guide-ampere-processors.

andrew added inline comments.Jun 9 2025, 9:07 AM

sys/arm64/arm64/identcpu.c
262	Is `AC04_1` the `0xac5` case I see in LLVM?

andrew added inline comments.Jun 10 2025, 9:52 AM

sys/arm64/arm64/identcpu.c
262	Based on the errata doc I found it looks like the `AC04` and `AC04_1` have the same `midr` so will both show up as the former.

Update the AmpereOne names

Harbormaster completed remote builds in B64740: Diff 156776.Jun 10 2025, 9:54 AM

This revision was not accepted when it landed; it landed in state Needs Review.Jun 23 2025, 1:20 PM

Closed by commit rG124b5dbf5c09: arm64: Add more CPU MIDR values (authored by andrew). · Explain Why

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG124b5dbf5c09: arm64: Add more CPU MIDR values.

andrew added a commit: rG935f00c4ddf6: arm64: Add more CPU MIDR values.Jan 15 2026, 2:51 PM

markj added a commit: rG61d0cea4c00f: arm64: Workaround the following errata.Jun 9 2026, 7:19 PM

Revision Contents
Changeset List

Path

Size

sys/

arm64/

arm64/

28 lines

include/

20 lines

Diff 157453

sys/arm64/arm64/identcpu.c

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sys/arm64/include/cpu.h

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