arm64: mte: configure initial state for system registers
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Authored by andrew on Mar 19 2026, 4:05 PM.

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manu
andrew

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arm64

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rG58de79153622: arm64: mte: configure initial state for system registers

Summary

The fields in SCTLR_EL1 and HCR_EL2 for enabling MTE are set, and if the
ID_AA64PFR1_EL1 register shows MTE is present, the GCR_EL1 register is
also configured, and the two TFSR registers which hold pending tag check
faults are cleared.

Sponsored by: Arm Ltd
Signed-off-by: Harry Moulton <harry.moulton@arm.com>

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rG FreeBSD src repository

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Buildable 71527
Build 68410: arc lint + arc unit

Event Timeline

andrew created this revision.Mar 19 2026, 4:05 PM

Herald added a reviewer: manu. · View Herald TranscriptMar 19 2026, 4:05 PM

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

andrew requested review of this revision.Mar 19 2026, 4:05 PM

Harbormaster completed remote builds in B71527: Diff 173916.Mar 19 2026, 4:05 PM

andrew added a parent revision: D55945: arm64: mte: add system register definitions.Mar 19 2026, 4:05 PM

andrew added a child revision: D55947: arm64: mte: handle synchronous tag check faults.

andrew accepted this revision.Apr 13 2026, 11:54 AM

This revision is now accepted and ready to land.Apr 13 2026, 11:54 AM

Closed by commit rG58de79153622: arm64: mte: configure initial state for system registers (authored by harry.moulton_arm.com, committed by andrew). · Explain WhyApr 13 2026, 2:24 PM

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG58de79153622: arm64: mte: configure initial state for system registers.

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sys/

arm64/

locore.S

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arm64: mte: configure initial state for system registersClosedPublicActions