io_apic: Support APIC Extended Destination IDs
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Authored by cperciva on Mar 17 2026, 3:29 AM.

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Reviewers

kib
jhb

Commits

rG0ef872c9353e: io_apic: Support APIC Extended Destination IDs
rG02b20e538267: io_apic: Support APIC Extended Destination IDs
rGb0e1b1069d65: io_apic: Support APIC Extended Destination IDs

Summary

If APIC Extended Destination ID support is enabled, use it in APIC RTEs
by allowing APIC IDs up to 2^15 - 1 and encoding the high bits into
Intel "reserved" bits per the standard.

MFC after: 2 weeks
Sponsored by: Amazon

Diff Detail

Repository

rG FreeBSD src repository

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Unit

Tests Skipped

Build Status

Buildable 71605
Build 68488: arc lint + arc unit

Event Timeline

cperciva created this revision.Mar 17 2026, 3:29 AM

Herald added a subscriber: imp. · View Herald TranscriptMar 17 2026, 3:29 AM

cperciva requested review of this revision.Mar 17 2026, 3:29 AM

Harbormaster completed remote builds in B71437: Diff 173778.Mar 17 2026, 3:29 AM

cperciva added a parent revision: D55426: msi: Support APIC Extended Destination IDs.Mar 17 2026, 3:57 AM

cperciva added a child revision: D55427: KVM: Detect Extended Destination ID support.

cperciva mentioned this in D55429: Xen: Detect Extended Destination ID support.Mar 17 2026, 4:06 AM

Use io_valid

Harbormaster completed remote builds in B71605: Diff 174057.Mar 21 2026, 12:03 AM

kib accepted this revision.Mar 28 2026, 12:29 AM

This revision is now accepted and ready to land.Mar 28 2026, 12:29 AM

Closed by commit rGb0e1b1069d65: io_apic: Support APIC Extended Destination IDs (authored by cperciva). · Explain WhyMar 28 2026, 5:56 AM

This revision was automatically updated to reflect the committed changes.

cperciva added a commit: rGb0e1b1069d65: io_apic: Support APIC Extended Destination IDs.

cperciva added a commit: rG02b20e538267: io_apic: Support APIC Extended Destination IDs.Apr 16 2026, 3:05 PM

cperciva added a commit: rG0ef872c9353e: io_apic: Support APIC Extended Destination IDs.Apr 16 2026, 3:12 PM

Revision Contents
Changeset List

Path

Size

sys/

x86/

include/

apicvar.h

1 line

x86/

io_apic.c

7 lines

Diff 174057

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sys/x86/include/apicvar.h