Hello, I have a custom QEMU which requires some non-standard command line arguments to launch a VM. e.g., "--proc-type=secondary" option is always required to launch a QEMU VM.

To launch the VM through libvirt (virsh) "How do I specify these non-standard options in XML?

OR if thats not possible ,Can you guide me at which point (code file) libvirt converts the XML to QEMU command (so that I can insert the option there).