CONFIG_CPU_CP15_MPU is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
CONFIG_CPU_CP15_MPU (not configurable)
configname: CONFIG_CPU_CP15_MPU
Linux Kernel Configuration
└─>CPU_CP15_MPU
In linux kernel since version 2.6.21 (release Date: 2007-04-25)
Processor has the CP15 register, which has MPU related registers.