what's got broken in bhyve after upgrade

Tue Nov 26 07:00:56 UTC 2019

upgraded to

FreeBSD puchar.net 11.3-STABLE FreeBSD 11.3-STABLE #0 r354807: Fri Nov 22 
22:45:43 CET 2019     root at puchar.net:/usr/src/sys/amd64/compile/puchar 
amd64

i have setting hw.vmm.topology.cores_per_package=16 in loader.conf

before upgrade - bhyve virtual machines (windows 7) see one CPU with 2 or 
4 cores (depending how much i use with -c option in bhyve).

after upgrade - bhyve sees single core CPUs. Which in case of windows 7 
pro means no more than 2 cores will be used.

What's wrong and how to fix it?