CONFIG_XTENSA_KSEG_MMU_V2 is not available for thedefaultarchitecture x86.
Result is shown for architecture xtensa

MMUv2: 128MB cached + 128MB uncached


KSEG layout
└─>MMUv2: 128MB cached + 128MB uncached
In linux kernel since version 4.1 (release Date: 2015-06-21)  
MMUv2 compatible kernel memory map: TLB way 5 maps 128MB starting
at KSEG_PADDR to 0xd0000000 with cache and to 0xd8000000
without cache.
KSEG_PADDR must be aligned to 128MB.