LinuxQuestions.org - libvirt qemu override

I followed the Arch linux guide for Intel GVT-g and I was able to run Fedora as a guest using the virtual GPU. I cannot however use libvirt qemu override in my xml. I have tried virsh edit and the xml editor in virt-manager but the configuration fails to be validated and it's deleted. This is what I want to add

Code:

qemu:override>

    <qemu:device alias="hostdev0">

      <qemu:frontend>

        <qemu:property name="x-igd-opregion" type="bool" value="true"/>

        <qemu:property name="romfile" type="string" value="/vbios_gvt_uefi.rom"/>

        <qemu:property name="driver" type="string" value="vfio-pci-nohotplug"/>

      </qemu:frontend>

    </qemu:device>

  </qemu:override>

If I use <qemu:commandline> it works.

Code:

<qemu:commandline>

    <qemu:arg value="-set"/>

    <qemu:arg value="device.hostdev0.romfile=/vbios_gvt_uefi.rom"/>

    <qemu:arg value="-set"/>

    <qemu:arg value="device.hostdev0.driver=vfio-pci-nohotplug"/>

    <qemu:arg value="-set"/>

    <qemu:arg value="device.hostdev0.x-igd-opregion=on"/>

  </qemu:commandline>

Is it a bug? I am using libvirt 8.0 on linux Mint 21. Do you know a place where I can post libvirt specific questions?