9front works with bhyve through the use of TianoCore uefi firmware.
Refer to the FreeBSD wiki page for general information.
Example invocation of bhyve for running 9front:
bhyve -c 2 -m 4G -w -H \
-s 0,hostbridge \
-s 3,ahci-cd,/path/to/9front.iso \
-s 4,ahci-hd,disk.img \
-s 5,virtio-net,tap0 \
-s 29,fbuf,tcp=0.0.0.0:5900,w=800,h=600,wait \
-s 30,xhci,tablet \
-l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd \
9front
This will start a 9front VM and start a VNC server on port 5900 for access to the graphical display of the guest. When prompted for setting the monitor type I’ve found the xga driver to work the best.
IPv6 does not seem to work with 9front guests.