Isolated Memory Region self test

modulename: imr_selftest.ko

configname: CONFIG_DEBUG_IMR_SELFTEST

Linux Kernel Configuration
└─>Kernel hacking
└─>$(SRCARCH) Debugging
└─>Isolated Memory Region self test
In linux kernel since version 4 (release Date: 2015-04-12)  
This option enables automated sanity testing of the IMR code.
Some simple tests are run to verify IMR bounds checking, alignment
and overlapping. This option is really only useful if you are
debugging an IMR memory map or are modifying the IMR code and want to
test your changes.

If unsure say N here.