CONFIG_CAVIUM_OCTEON_LOCK_L2_MEMCPY is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

Lock memcpy() in L2

configname: CONFIG_CAVIUM_OCTEON_LOCK_L2_MEMCPY

Linux Kernel Configuration
└─>Lock memcpy() in L2
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
Lock the kernel's implementation of memcpy() into L2.