Chengtao Wang
To run the USB keyboard driver, put usbkbd.c, Makefile in the same folder of the virtual machine.

1) In the folder, type: make
2) Install the module: insmod usbkbd.ko
3) Give the USB keyboard device to the virtual machine.
4) To get the device number, type: dmesg
For my device, I get 1-2:1.0
5) To check the usbhid device: ls -l /sys/bus/usb/drivers/usbhid
6) Unbind the usbhid device and bind the usbkbd device:
echo -n "1-2:1.0" > /sys/bus/usb/drivers/usbhid/unbind
echo -n "1-2:1.0" > /sys/bus/usb/drivers/usbkbd/bind

7) Now we can check our driver.