Re: How to use Virtio GPU on FreeBSD as guest OS.

 What I find strange is that this configuration works on Windows 11 to
virtualize FreeBSD using -device vmware-svga :

I:\OS\vms\qemu\qemu-system-x86_64w.exe -accel whpx -machine q35 -cpu
kvm64,hv_relaxed,hv_time,hv_synic -m 8G -device
vmware-svga,id=video0,vgamem_mb=16,bus=pcie.0,addr=0x1 -audiodev
dsound,id=snd0 -device ich9-intel-hda -device hda-duplex,audiodev=snd0 -hda
"I:\Backup\FreeBSD\FreeBSD-140-zfs.img" -device hda-duplex,audiodev=snd0
-drive file=\\.\PhysicalDrive4 -drive file=\\.\PhysicalDrive5 -drive
file=\\.\PhysicalDrive6 -drive file=\\.\PhysicalDrive8 -drive
file=\\.\PhysicalDrive12 -rtc base=localtime -device
usb-ehci,id=usb,bus=pcie.0,addr=0x3 -device usb-tablet -device usb-kbd
-smbios type=2 -nodefaults -netdev
tap,id=mynet0,ifname="OpenVPN-TAP-Windows",script=no,downscript=no -device
e1000,netdev=mynet0,mac=52:55:00:d1:55:01 -device ich9-ahci,id=sata -bios
"I:\OS\vms\qemu\OVMF_combined.fd"

One can think that it will work even on Linux for the same setup (qemu +
hyper-V on Windows 11),but it does not. I'm experiencing a lot of problems
when I add -accel whpx on a Debian VM. These problems go away if I remove
it.

Adding " -device vmware-svga,id=video0,vgamem_mb=16,bus=pcie.0,addr=0x1" to
the qemu / Debian parameters will cause it won't boot. So,this :


I:\OS\vms>I:\OS\vms\qemu\qemu-system-x86_64.exe -machine q35 -cpu
kvm64,hv_relaxed,hv_time,hv_synic -m 8G -device
vmware-svga,id=video0,vgamem_mb=16,bus=pcie.0,addr=0x1 -audiodev
dsound,id=snd0 -device ich9-intel-hda -device hda-duplex,audiodev=snd0 -hda
"I:\Backup\Linux\Debian.img" -drive file=\\.\PhysicalDrive5 -drive
file=\\.\PhysicalDrive6 -drive file=\\.\PhysicalDrive8 -rtc base=localtime
-device usb-ehci,id=usb,bus=pcie.0,addr=0x3 -device usb-tablet -device
usb-kbd -smbios type=2 -nodefaults -netdev user,id=net0 -device
e1000,netdev=net0,id=net0,mac=52:54:00:11:22:33 -device ich9-ahci,id=sata
-bios "I:\OS\vms\qemu\OVMF_combined.fd"


will cause the Debian VM to freeze before reaching the login prompt. I
don't know if Linux has the proper vmware-svga driver,I didn't find it.

Regarding virtualizing Windows 7 on Windows 11 using the same setup,I can't
add -accel whpx and most importantly,what I care more, the -device
vmware-svga does not work. So,in this kind of setup,
*FreeBSD is the winner because it supports everything (hyper-V and the
vmware-svga 3D accelerated device.*


On Sat, Apr 27, 2024 at 9:41 PM Yusuf Khan <yusisamerican@gmail.com> wrote:

> So your issue is that the performance is worse than Linux?
>
> There is no 3d graphics driver for virtio in mainline drm-kmod but
> https://github.com/freebsd/drm-kmod/pull/119 has
> experimental support, although that PR exists it seems to be
> non-functional with a crash.
>


-- 
Mario.