the ethtool of the xen-netfront does not have the full function

[Suoben]

hi all:

We found that the xen-netfront does not have the full function of 
ethtool. When the VM's network is configured as xennet, the ethtool 
commands provide very little function, such as the lack of Speed value. 
Whereas VMware's vmxnet3 network card has the function of ethtool.

We'd like to know that is there any plan to improve this?