vmm/amd64: port illumos#16223: bhyve returns bogus cpuid 8000_001D leaf
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Authored by rosenfeld_grumpf.hope-2000.org on Oct 20 2025, 7:59 AM.

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Reviewers

emaste
corvink

Group Reviewers

bhyve

Summary

This is a port of this bhyve improvement coming from illumos:

16223 bhyve returns bogus cpuid 8000_001D leaf
https://www.illumos.org/issues/16223

This fixes an issue in the CPUID emulation discovered on AMD CPUs.

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Repository

rG FreeBSD src repository

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Build Status

Buildable 67931
Build 64814: arc lint + arc unit

Event Timeline

rosenfeld_grumpf.hope-2000.org created this revision.Oct 20 2025, 7:59 AM

Herald added a reviewer: bhyve. · View Herald TranscriptOct 20 2025, 7:59 AM

Herald added subscribers: bcran, rgrimes, imp. · View Herald Transcript

rosenfeld_grumpf.hope-2000.org requested review of this revision.Oct 20 2025, 7:59 AM

Harbormaster completed remote builds in B67931: Diff 164577.Oct 20 2025, 7:59 AM

Please descripe the bug and expected behavior in more detail in the commit message.

This revision is now accepted and ready to land.Oct 21 2025, 6:25 AM

Revision Contents
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sys/

amd64/

vmm/

vmm_cpuid.c

17 lines

Diff 164577

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vmm/amd64: port illumos#16223: bhyve returns bogus cpuid 8000_001D leafAcceptedPublicActions