Get 9front (Plan9 fork) booted under FreeBSD bhyve

9front-yabs.sh

#!/bin/sh

# Yet Another bhyve Script v0.4
# Use this to try and boot 9front, the Plan9 fork.
# Virtio emulation works better (ported drivers)
# PS/2 Mouse emulation requires updated bhyve(8)
# If you don't have it, patch is uploaded with this Gist
# When partitioning, I have had more success with MBR
# GPT may work for some people

name=9front
ram=512M
cpu=1
disk=9front.img
media=9front-5561.df1dc1ff2475.iso
mediatype=cd
blkemu=virtio-blk
tap=tap33
fw=BHYVE_UEFI.fd
ip=127.0.0.1
port=5910
w=wait
sw=800
sh=600

# Stuff not needed for testing
#	-s 17,xhci,tablet \

bhyve \
	-c ${cpu} -m ${ram} \
	-H -w \
	-s 0,hostbridge \
	-s 1,ahci-${mediatype},${media} \
	-s 2,${blkemu},${disk} \
	-s 4,virtio-net,${tap} \
	-s 8,fbuf,tcp=${ip}:${port},${w},w=${sw},h=${sh} \
	-s 31,lpc \
	-l bootrom,${fw} \
	${name} &

ps2mousefix.patch

--- ps2mouse.c  (revision 311582)
+++ ps2mouse.c  (working copy)
@@ -171,7 +171,9 @@

        val0 =  sc->status & (PS2M_STS_LEFT_BUTTON |
            PS2M_STS_RIGHT_BUTTON | PS2M_STS_MID_BUTTON);
-
+       // PG
+       val0 |= 0x08;
+       
        if (sc->delta_x >= 0) {
                if (sc->delta_x > 255) {
                        val0 |= (1 << 6);

Note the ps2mousefix.patch should be merged into HEAD already so you no longer need to patch.