Added the "projects/bhyvearm64-v8Sep2021" tag for the utils and FreeBSD repositories.
Added the bootrom feature, which was tested with the FreeBSD and Debian for arm64 images.
There is a script in the utils reopsitory, called bootrom_run.sh, that starts a guest.
As bootrom, you can compile and use U-Boot:

https://github.com/FreeBSD-UPB/u-boot

The following instructions are used to generate the u-boot.bin file:

gmake bhyve_arm64_defconfig
gmake CROSS_COMPILE=aarch64-none-elf- -j2

Rebased with CURRENT
Removed consport and added MMIO UART.
Detached the device tree from the guest's kernel images. The compiled device tree can be sent as an argument to bhyveload.

In D26976#647375, @emaste wrote:

Is this work also available in a git repo?

Solved a kernel panic while destroying the virtual machine:

bhyvectl --vm=test --destroy

Removed the armv7 support.
Removed auxiliary files used for specific devices (kernel configs, device trees).