Xen filesystem

modulename: xenfs.ko

configname: CONFIG_XENFS

Linux Kernel Configuration
└─>Device Drivers
└─>Xen driver support
└─>Xen filesystem
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
The xen filesystem provides a way for domains to share
information with each other and with the hypervisor.
For example, by reading and writing the "xenbus" file, guests
may pass arbitrary information to the initial domain.
If in doubt, say yes.

source code:

depends
CONFIG_XEN