Differential D54251

arm64: Add an initial GICv5 ITS driver
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Authored by andrew on Dec 16 2025, 12:09 PM.

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rG06d64ee0ecc2: arm64: Add an initial GICv5 ITS driver

Summary

Add a driver to support the GICv5 interrupt translation service (ITS).
The ITS is responsible to handling ITS events & translating them to an
interrupt to be delivered to the interrupt routing service (IRS).

An example event is a MSI or MSI-X is delivered. The ITS will generate
an LPI depending on which device sent the interrupt and the value the
device wrote.

This is a similar concept to the GICv3 ITS, however the implementation
details are different so it needs a new driver.

Sponsored by: Arm Ltd

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rG FreeBSD src repository

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Build Status

Buildable 73102
Build 69985: arc lint + arc unit

Event Timeline

andrew created this revision.Dec 16 2025, 12:09 PM

Herald added a reviewer: manu. · View Herald TranscriptDec 16 2025, 12:09 PM

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

andrew requested review of this revision.Dec 16 2025, 12:09 PM

Harbormaster completed remote builds in B69295: Diff 168184.Dec 16 2025, 12:09 PM

andrew added a parent revision: D54250: arm64: Add an initial GICv5 driver.Dec 16 2025, 12:09 PM

andrew added a child revision: D54252: arm64: Add an initial GICv5 IWB driver.

Clean up table size/alignment handling
Read the table PA range from the register
Support 2 level device tables
Support a non-coherent ITS
Cleanup better on attach failure
Implement more functions

Harbormaster completed remote builds in B73102: Diff 177837.May 14 2026, 4:51 PM

This revision was not accepted when it landed; it landed in state Needs Review.Jun 18 2026, 2:58 PM

Closed by commit rG06d64ee0ecc2: arm64: Add an initial GICv5 ITS driver (authored by andrew). · Explain Why

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG06d64ee0ecc2: arm64: Add an initial GICv5 ITS driver.

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sys/

arm64/

arm64/

1237 lines

conf/

1 line

Diff 177837

sys/arm64/arm64/gicv5_its.c

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sys/conf/files.arm64

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