NVMe loopback device support

modulename: nvme-loop.ko

configname: CONFIG_NVME_TARGET_LOOP

Linux Kernel Configuration
└─>Device Drivers
└─>NVMe loopback device support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This enables the NVMe loopback device support, which can be useful
to test NVMe host and target side features.

If unsure, say N.

source code: