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acpi: Add a pseudo-bus for APEI devices to manage resources
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Authored by jhb on Jul 3 2026, 4:01 PM.
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Details

Summary

Different APEI tables can reuse the same registers (and sometimes
different views of the same register, e.g. 32- vs 64-bit mappings of
the same register). To enable this sharing, apei0 now acts as a bus
device managing a pool of allocated resources and handing out mappings
to child devices which handle individual tables.

Most of the previous apei(4) driver has been moved into a new
hest0 device that is a child of apei0.

Sponsored by: Netflix

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rG FreeBSD src repository
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Buildable 74501
Build 71384: arc lint + arc unit

Event Timeline

jhb requested review of this revision.Jul 3 2026, 4:01 PM
jhb created this revision.

Fix a malloc type mismatch noted by Claude

This revision is now accepted and ready to land.Jul 3 2026, 4:49 PM
sys/dev/acpica/acpi_apei_bus.c
114

Why create a fake one?