config IUCV depends on S390 def_tristate y if S390 prompt "IUCV support (S390 - z/VM only)" help Select this option if you want to use inter-user communication under VM or VIF. If you run on z/VM, say "Y" to enable a fast communication link between VM guests. config AFIUCV depends on S390 def_tristate m if QETH_L3 || IUCV prompt "AF_IUCV Socket support (S390 - z/VM and HiperSockets transport)" help Select this option if you want to use AF_IUCV socket applications based on z/VM inter-user communication vehicle or based on HiperSockets.