[libvirt] libvirt xml can't specify USB physical port when passthrough USB device to VM

[Wangrui (K)]

Hello,

I passthrough a host usb device to a guest  with a bus number and device number in the xml to identify the usb device.
When I unplug and then plug back into the same USB physical port, the guest identifies the usb device failed. Because on the host ,the usb device number increases.
So , I want to know that whether Libvirt will provide an interface that identifies a host usb device with bus number and physical port .
As far as I know ,Qemu upstream had added a hostport property which allows to specify the host usb with bus number and physical port.
the patch is :
https://lists.gnu.org/archive/html/qemu-devel/2011-05/msg02341.html

Best Regards

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