smcss.
if unsure, say Y.
+
+config SMC_LO
+ bool "SMC intra-OS shortcut with loopback-ism"
+ depends on SMC
+ default n
+ help
+ SMC_LO enables the creation of an Emulated-ISM device named
+ loopback-ism in SMC and makes use of it for transferring data
+ when communication occurs within the same OS. This helps in
+ convenient testing of SMC-D since loopback-ism is independent
+ of architecture or hardware.
+
+ if unsure, say N.