I want to create a virtual hci device on my virtual machine. I have seen that qemu has options supporting this 


Is there any support for these options in libvirt? I was not able to find anything in documentation so I added the qemu command line xml as follows
    <qemu:arg value='-usbdevice'/>
    <qemu:arg value='bt:hci'/>
    <qemu:arg value='-bt'/>
    <qemu:arg value='hci,host'/>

but when I try to run my machine from virt-manager i get the following error:

Error starting domain: internal error: process exited while connecting to monitor: 2017-02-28T21:25:51.735987Z qemu-system-x86_64: -device ich9-usb-ehci1,id=usb,bus=pcie.0,addr=0x1d.0x7: PCI: slot 29 function 7 not available for ich9-usb-ehci1, in use by ich9-usb-ehci1

this error does not appear if I remove the commandline xml nodes

Does anyone have any guidance for troubleshooting this?

If it helps at all, virsh -v gives 2.1.0, virt-manager about page lists 1.3.2 and qemu-system-x86_64 --help gives 2.6.1 I am running Ubuntu 16.10.

Max Ehrlich