Tutorial Part 1, Debian 8, GPU Passthrough with OVMF powered by libvirt and Virt-Manager

Blog post from Alex Williamson about Libvirt with GPU passthrough and OVMF
http://vfio.blogspot.com/2015/05/vfio-gpu-how-to-series-part-4-our-first.html

Preparation for GPU passthrough:
http://kvm-exp.blogspot.com/2015/06/links-and-scripts-from-video.html

My hardware components:
Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz socket 1150
GA-Z97X-UD3H-BK
16GB DDR3 Memory
512GB SSD
NVIDIA GeForce GTX 780 (ASUS GTX780-DC2OC-3GD5) for passthrugh

Here are the used commands and configurations

Install needed applications:
sudo apt-get install libvirt-daemon virt-manager

Check your passthrough device:
lspci -nk

Check groups:
groups

Change groups for libvirt:
sudo usermod -a -G libvirt,libvirt-qemu USERNAME

Create imagefile that basesd on a backingfile or a masterimage:
qemu-img create -f qcow2 -o backing_file=win7-uefi-x64_system.qcow2,backing_fmt=qcow2 win7-uefi-libvirt-x64_system.qcow2

Check the new imagefile:
qemu-img info win7-uefi-libvirt-x64_system.qcow2

Edit the libvirt machine files manually:
sudo virsh edit "machine name"

Insert the OVMF Firmwarefile to XML (without # lines):
#  <os>
#    ..
    <loader readonly='yes' type='rom'>/usr/share/ovmf/OVMF.fd</loader>
#    ..
#  </os>

For Nvidia Users, use this (without # lines):
#  <features>
#    ..
    <kvm>
      <hidden state='on'/>
    </kvm>
#    ..
#  </features>

Delete tablet device, it's not helpfull with GPU passthrough:
delete    <input type='tablet' bus='usb'/>

change:
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
to:
    <input type='mouse' bus='usb'/>
    <input type='keyboard' bus='usb'/>