This instruction lets you create a UEFI VM for testing with an external USB-drive on a Fedora host.

• Install tools:

  dnf install virt-install virt-viewer libvirt

• Add yourself to the libvirt group.
• Lookup the USB drive device, for example /dev/sda.

• Create the VM with UEFI support:

  virt-install --connect qemu:///system --name uefi    \
      --vcpus 4               \
      --memory 2048           \
      --disk /dev/sda,bus=usb,removable=true \
      --boot uefi,menu=on     \
      --os-variant rhl7       \
      --noautoconsole

• Open console:

  virt-viewer --connect qemu:///system uefi

• Force off:

  virsh --connect qemu:///system destroy uefi

• Remove VM:

  virsh --connect qemu:///system undefine --nvram uefi