I have one monitor,two vga cards,one is nvidia(host)
the other ati rs450(guest),I use this script for use a vm
windows with a native gpu(the ati rs450)
I see this video and seems to be possible using only one
monitor,but I don't understand how to do
The video
QEMU VGA passthrough without a real monitor attached - YouTube
My script
qemu-system-x86_64 -enable-kvm -m 6192 -cpu host,kvm=off \
-device vfio-pci,host=06:00.0,multifunction=on,x-vga=on \
-device vfio-pci,host=06:00.1 \
-net nic,model=e1000 -net tap,ifname=tap0,script=no \
-drive file=.local/libvirt/images/win7.qcow2,format=qcow2 \
-cdrom 1.iso \
-vga qxl -sdl -boot c