Support for the z/VM CP interface (VM only)

modulename: vmcp.ko

configname: CONFIG_VMCP

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Support for the z/VM CP interface (VM only)
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Select this option if you want to be able to interact with the control
program on z/VM

source code:
drivers/s390/char/vmcp.c
selects

CONFIG_CMA

depends
CONFIG_S390