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Differential D54832

arm/gic: Detect broken configurations
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Authored by andrew on Jan 23 2026, 12:10 PM.
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ARM
arm64
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rGbcb8b267f323: arm/gic: Detect broken configurations
rG6c5fdba45a63: arm/gic: Detect broken configurations
Summary

Some virtualization platforms provide broken configurations. There
is a GIC interrupt controller, however accessing the CPU interface
registers leads to an external data abort. As these are needed to
handle interrupts we are unable to boot further.

Detect this misconfiguration and panic to tell the user the issue.

Sponsored by: Arm Ltd

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rG FreeBSD src repository
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Event Timeline

andrew created this revision.Jan 23 2026, 12:10 PM
Herald added a subscriber: imp. · View Herald TranscriptJan 23 2026, 12:10 PM
andrew requested review of this revision.Jan 23 2026, 12:10 PM
Harbormaster completed remote builds in B70069: Diff 170264.Jan 23 2026, 12:10 PM
emaste accepted this revision as: emaste.Jan 23 2026, 1:23 PM
emaste added a subscriber: emaste.
emaste added inline comments.
sys/arm/arm/gic.c
362

or "broken hypervisor or hardware configuration"?

This revision is now accepted and ready to land.Jan 23 2026, 1:23 PM
Closed by commit rG6c5fdba45a63: arm/gic: Detect broken configurations (authored by andrew). · Explain WhyJan 23 2026, 5:04 PM
This revision was automatically updated to reflect the committed changes.
andrew added a commit: rG6c5fdba45a63: arm/gic: Detect broken configurations.
andrew added a commit: rGbcb8b267f323: arm/gic: Detect broken configurations.Feb 9 2026, 4:34 PM

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sys/arm/arm/gic.c

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