Virtual GPU for FreeBSD as guest virtualized with qemu / kvm -- best alternative ? Cirrus ?

Hello to everyone.


I would like to virtualize FreeBSD on Windows 11 with qemu-kvm (for
Windows). I've end up with the following parameters which are working :


I:\OS\qemu\Linux\qemu\qemu-system-x86_64w.exe -accel whpx -machine q35 \
-cpu Westmere,vendor=GenuineIntel,+pcid,+ssse3,+sse4.2,+popcnt,+avx,+aes,+xsave,+xsaveopt,check
\
-m 8G -vga qxl -audiodev dsound,id=snd0 -device ich9-intel-hda -device \
hda-duplex,audiodev=snd0 \
-hda "I:\OS\ISO\FreeBSD\FreeBSD-13.2-RELEASE-amd64-disc1.iso" \
-hdb "I:\OS\qemu\Linux\FreeBSD.img" -rtc base=localtime \
-device nec-usb-xhci,id=xhci -device usb-tablet -device usb-kbd \
-global nec-usb-xhci.msi=off -smbios type=2 -nodefaults -netdev user,id=net0 \
-device virtio-net-pci,netdev=net0,id=net0,mac=52:54:00:11:22:33 \
-device ich9-ahci,id=sata -bios
"I:\OS\qemu\Linux\OSX-KVM-master\OVMF_combined.fd"


Now I'm trying to configure Xorg and the xfce4 desktop environment. Since
I'm using qemu,there are a lot of display devices available to try,but I
don't know which one is good for FreeBSD. In the website below there is a
good list of all options available :


https://www.kraxel.org/blog/2019/09/display-devices-in-qemu/


On FreeBSD I have installed the package drm-kmod and it suggests to me to
add to the rc.conf file one of these parameters :



   1.

   for amdgpu : kld_list="amdgpu"
   2.

   for intel : kld_list="i915kms"
   3.

   for radeonkms : kld_list="radeonkms"


qemu does not cover any of those. I don't know which option is decent for
my case. I would like to try with the cirrus display driver. Maybe this one
:


https://www.freshports.org/x11-drivers/xf86-video-cirrus/


So,I have installed this package : pkg install xf86-video-cirrus

I've rebooted and I have changed -vga qxl to -vga cirrus

FreeBSD recognized it at 0:1:0


[image: 2023-07-23 15_21_33-QEMU.png]

I have created xorg.conf with this content :

Section "Device"
Identifier "Device0"
Driver "cirrus"
BusID "PCI:0:1:0"
Screen 0
EndSection


error : no screens found.

This is the reason why it does not work :


[image: 2023-07-23 15 49 44.png]

but the module seems to be there :

cd /usr/local/lib/xorg/modules/drivers/
ls*cirrus_drv.so* ; modesetting_drv.so ; scfb_drv.so ; vesa_drv.so ;


What should I do ?

-- 
Mario.