Code:
/usr/sbin/bhyve -c cpus=2,sockets=2,cores=1,threads=1 -m 4096 -S -A -w -H -s 0:0,hostbridge -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd -s 3:0,ahci,cd:/mnt/zones/public/isos/pfSense-CE-2.4.5-RELEASE-p1-amd64.iso -s 30:0,xhci,tablet -s 2:0,ahci -s 4:0,virtio-blk,/dev/zvol/apps/domains/vm-pfsense-disk0 -s 31,lpc -l com1,/dev/nmdm3A -s 5:1,passthru,6/0/1 -s 5:3,passthru,6/0/3 -s 29,fbuf,vncserver,tcp=0.0.0.0:48854,w=1024,h=768 3_pfsense
03/01/2021 17:45:03 Listening for VNC connections on TCP port 48854
03/01/2021 17:45:03 Listening for VNC connections on TCP6 port 48854
Unhandled ps2 mouse command 0xe1
03/01/2021 17:45:22 other clients:
03/01/2021 17:45:22 Client Protocol Version 3.8
03/01/2021 17:45:22 Protocol version sent 3.8, using 3.8
03/01/2021 17:45:22 rfbProcessClientSecurityType: executing handler for type 1
03/01/2021 17:45:22 rfbProcessClientSecurityType: returning securityResult for client rfb version >= 3.8
03/01/2021 17:45:22 Pixel format for client 127.0.0.1:
03/01/2021 17:45:22 32 bpp, depth 24, little endian
03/01/2021 17:45:22 true colour: max r 255 g 255 b 255, shift r 16 g 8 b 0
03/01/2021 17:45:22 Using image quality level 6 for client 127.0.0.1
03/01/2021 17:45:22 Using JPEG subsampling 0, Q79 for client 127.0.0.1
03/01/2021 17:45:22 Using compression level 2 for client 127.0.0.1
03/01/2021 17:45:22 Enabling NewFBSize protocol extension for client 127.0.0.1
03/01/2021 17:45:22 Enabling LastRect protocol extension for client 127.0.0.1
03/01/2021 17:45:22 rfbProcessClientNormalMessage: ignoring unsupported encoding type Enc(0xFFFFFEFE)
03/01/2021 17:45:22 rfbProcessClientNormalMessage: ignoring unsupported encoding type Enc(0xFFFFFECC)
03/01/2021 17:45:22 rfbProcessClientNormalMessage: ignoring unsupported encoding type Enc(0xFFFFFEC8)
03/01/2021 17:45:22 rfbProcessClientNormalMessage: ignoring unsupported encoding type Enc(0xFFFFFEC7)
03/01/2021 17:45:22 Enabling full-color cursor updates for client 127.0.0.1
03/01/2021 17:45:22 Using tight encoding for client 127.0.0.1
fbuf frame buffer base: 0x941e00000 [sz 16777216]
/usr/sbin/bhyve -c cpus=2,sockets=2,cores=1,threads=1 -m 4096 -S -A -w -H -s 0:0,hostbridge -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd -s 30:0,xhci,tablet -s 3:0,virtio-blk,/dev/zvol/apps/domains/vm-pfsense-disk0 -s 31,lpc -l com1,/dev/nmdm3A -s 4:1,passthru,6/0/1 -s 4:3,passthru,6/0/3 -s 29,fbuf,vncserver,tcp=0.0.0.0:48854,w=1024,h=768 3_pfsense
03/01/2021 17:49:16 Listening for VNC connections on TCP port 48854
03/01/2021 17:49:16 Listening for VNC connections on TCP6 port 48854
03/01/2021 17:49:17 other clients:
03/01/2021 17:49:17 Client Protocol Version 3.8
03/01/2021 17:49:17 Protocol version sent 3.8, using 3.8
03/01/2021 17:49:17 rfbProcessClientSecurityType: executing handler for type 1
03/01/2021 17:49:17 rfbProcessClientSecurityType: returning securityResult for client rfb version >= 3.8
03/01/2021 17:49:18 Pixel format for client 127.0.0.1:
03/01/2021 17:49:18 32 bpp, depth 24, little endian
03/01/2021 17:49:18 true colour: max r 255 g 255 b 255, shift r 16 g 8 b 0
03/01/2021 17:49:18 Using image quality level 6 for client 127.0.0.1
03/01/2021 17:49:18 Using JPEG subsampling 0, Q79 for client 127.0.0.1
03/01/2021 17:49:18 Using compression level 2 for client 127.0.0.1
03/01/2021 17:49:18 Enabling NewFBSize protocol extension for client 127.0.0.1
03/01/2021 17:49:18 Enabling LastRect protocol extension for client 127.0.0.1
03/01/2021 17:49:18 rfbProcessClientNormalMessage: ignoring unsupported encoding type Enc(0xFFFFFEFE)
03/01/2021 17:49:18 rfbProcessClientNormalMessage: ignoring unsupported encoding type Enc(0xFFFFFECC)
03/01/2021 17:49:18 rfbProcessClientNormalMessage: ignoring unsupported encoding type Enc(0xFFFFFEC8)
03/01/2021 17:49:18 rfbProcessClientNormalMessage: ignoring unsupported encoding type Enc(0xFFFFFEC7)
03/01/2021 17:49:18 Enabling full-color cursor updates for client 127.0.0.1
03/01/2021 17:49:18 Using tight encoding for client 127.0.0.1
Unhandled ps2 mouse command 0xe1
fbuf frame buffer base: 0x941e00000 [sz 16777216]
/usr/sbin/bhyve -c cpus=2,sockets=2,cores=1,threads=1 -m 4096 -S -A -w -H -s 0:0,hostbridge -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd -s 30:0,xhci,tablet -s 3:0,virtio-blk,/dev/zvol/apps/domains/vm-pfsense-disk0 -s 31,lpc -l com1,/dev/nmdm3A -s 4:1,passthru,6/0/1 -s 4:3,passthru,6/0/3 -s 29,fbuf,vncserver,tcp=0.0.0.0:48854,w=1024,h=768 3_pfsense
vm_open: Invalid argument
