Create xen entries under /sys/hypervisor

modulename: sys-hypervisor.ko

configname: CONFIG_XEN_SYS_HYPERVISOR

Linux Kernel Configuration
└─>Device Drivers
└─>Create xen entries under /sys/hypervisor
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
Create entries under /sys/hypervisor describing the Xen
hypervisor environment. When running native or in another
virtual environment, /sys/hypervisor will still be present,
but will have no xen contents.

source code: