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intr: Support per-IPI devices
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Authored by andrew on Oct 22 2024, 2:05 PM.
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Group Reviewers
arm64
ARM
riscv
Summary

We may wish to override the device used to handle a specific IPI, e.g.
SDEI on arm64 could be used as a non-maskable interrupt to handle
IPI_STOP_HARD.

Support this by adding a KPI to set a per-IPI device. Use the priority
to decide if the per-IPI or global device is selected for each IPI.

Sponsored by: Arm Ltd

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rG FreeBSD src repository
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Buildable 60147
Build 57031: arc lint + arc unit