My gamingvm definition

<domain type='kvm'>
  <name>gamingvm</name>
  <uuid>3806c04e-63da-11e6-9065-2b1223fbaddf</uuid>
  <memory>16777216</memory>
  <currentMemory>16777216</currentMemory>
  <memoryBacking>
    <hugepages/>
    <nosharepages/>
  </memoryBacking>
  <vcpu placement="static">6</vcpu>
  <cpu mode="host-passthrough">
    <topology sockets="1" cores="3" threads="2" />
  </cpu>
  <os>
    <type arch="x86_64" machine="q35">hvm</type>
    <loader>/usr/share/qemu/OVMF.fd</loader>
  </os>
  <features>
    <hyperv>
      <relaxed state="off" />
      <vapic state="off" />
      <spinlocks state="off" retries="8191" />
    </hyperv>
    <kvm>
      <hidden state='on'/>
    </kvm>
    <acpi/>
  </features>
  <clock offset="localtime">
    <timer name="hypervclock" present="no" />
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <controller type="usb" index="0" model='nec-xhci' /><!-- Specify model='nec-xhci' to speedup usb3? Sound is choppy anyway -->
    <controller type="usb" index="1" />
    <controller type="usb" index="2" />
    <controller type="usb" index="3" />
    <controller type="sata" index="0" />
    <controller type="pci" index="0" model="pcie-root" />
    <controller type="pci" index="1" model="dmi-to-pci-bridge" />
    <controller type="pci" index="2" model="pci-bridge" />
    <memballoon model="none" />
    <playback compression='off'/>
    <disk type="file" device="disk">
      <driver name="qemu" type="qcow2"/>
      <source file="/home/paul/vm/images/gamingvm.qcow2"/>
      <target dev="vda" bus="virtio"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x0"/>
    </disk>
    <disk type="file" device="cdrom">
      <driver name="qemu" type="raw"/>
      <!--<source file="/home/paul/vm/iso/windows10-x64/Windows10.iso"/>-->
      <target dev="hdc" bus="sata"/>
      <readonly/>
      <address type="drive" controller="0" bus="0" target="0" unit="0"/>
    </disk>
    <disk type="file" device="cdrom">
      <driver name="qemu" type="raw"/>
      <!--<source file="/home/paul/vm/iso/virtio/virtio-win-0.1.118.iso"/>-->
      <target dev="hdd" bus="sata"/>
      <readonly/>
      <address type="drive" controller="0" bus="0" target="0" unit="1"/>
    </disk>
    <interface type='bridge'>
      <source bridge='virbr0' mode='virtio'/>
      <mac address="00:11:22:33:44:55"/>
    </interface>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <source>
        <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
      </source>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb'><!-- Headset Plantronics Rig 500 HD -->
      <source>
        <vendor id='0x047f'/>
        <product id='0xc03b'/>
      </source>
    </hostdev>
    <hostdev mode='subsystem' type='usb'><!-- Logitech Gaming Mouse-->
      <source>
        <vendor id='0x046d'/>
        <product id='0xc041'/>
      </source>
    </hostdev>
  </devices>
  <qemu:commandline>
  <qemu:arg value="-device" />
  <qemu:arg value="ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1" />
  <qemu:arg value="-device" />
  <qemu:arg value="vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on" />
  <qemu:arg value="-device" />
  <qemu:arg value="vfio-pci,host=01:00.1,bus=root.1,addr=00.1" />
  <qemu:arg value="-cpu" />
  <qemu:arg value="host" />
  <!--<qemu:env name='QEMU_PA_SAMPLES' value='1024'/>
  <qemu:env name='QEMU_AUDIO_DRV' value='pa'/>
  <qemu:env name='QEMU_PA_SERVER' value='/run/user/1000/pulse/native'/>-->
  </qemu:commandline>
</domain>