Xen usb virtual host driver

modulename: xen-hcd.ko

configname: CONFIG_USB_XEN_HCD

Linux Kernel Configuration
└─>Device Drivers
└─>USB support
└─>Xen usb virtual host driver
In linux kernel since version 5.2 (release Date: 2019-07-07)  
The Xen usb virtual host driver serves as a frontend driver enabling
a Xen guest system to access USB Devices passed through to the guest
by the Xen host (usually Dom0).
Only needed if the kernel is running in a Xen guest and generic
access to a USB device is needed.

source code: