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Differential D55431

Bhyve: Detect Extended Destination ID support
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Authored by cperciva on Feb 22 2026, 4:11 AM.
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bhyve
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rG2b82661c9792: Bhyve: Detect Extended Destination ID support
rGd2c7300800d0: Bhyve: Detect Extended Destination ID support
rG8dd9a0d52175: Bhyve: Detect Extended Destination ID support
Summary

Bhyve advertises support for the Extended Destination ID standard via
bit 0 (aka CPUID_BHYVE_FEAT_EXT_DEST_ID) of the value returned in the
EAX register when Bhyve features are queried via CPUID.

MFC after: 2 weeks

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rG FreeBSD src repository
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Event Timeline

cperciva created this revision.Feb 22 2026, 4:11 AM
Herald added a subscriber: imp. · View Herald TranscriptFeb 22 2026, 4:11 AM
cperciva requested review of this revision.Feb 22 2026, 4:11 AM
Harbormaster completed remote builds in B70870: Diff 172430.Feb 22 2026, 4:11 AM
cperciva added a parent revision: D55430: vmm: Move defines from x86.c to x86/bhyve.h.Feb 22 2026, 4:11 AM
cperciva added a child revision: D55432: Hyper-V: Detect Extended Destination ID support.
cperciva added a reviewer: bhyve.Feb 22 2026, 4:15 AM
cperciva updated this revision to Diff 172540.Feb 23 2026, 7:53 PM

Only enable if ext_dest_id is set to -1.

Harbormaster completed remote builds in B70928: Diff 172540.Feb 23 2026, 7:53 PM
cperciva updated this revision to Diff 173783.Mar 17 2026, 4:00 AM

Move detection code into local_apic.c

Harbormaster completed remote builds in B71442: Diff 173783.Mar 17 2026, 4:00 AM
This revision was not accepted when it landed; it landed in state Needs Review.Mar 28 2026, 5:57 AM
Closed by commit rG8dd9a0d52175: Bhyve: Detect Extended Destination ID support (authored by cperciva). · Explain Why
This revision was automatically updated to reflect the committed changes.
cperciva added a commit: rG8dd9a0d52175: Bhyve: Detect Extended Destination ID support.
cperciva added a commit: rGd2c7300800d0: Bhyve: Detect Extended Destination ID support.Apr 16 2026, 3:05 PM
cperciva added a commit: rG2b82661c9792: Bhyve: Detect Extended Destination ID support.Apr 16 2026, 3:12 PM

Revision Contents
Changeset List

PathSize
sys/
x86/
x86/
8 lines

Diff 174421

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sys/x86/x86/local_apic.c

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