CONFIG_ARM64_64K_PAGES is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

64KB

configname: CONFIG_ARM64_64K_PAGES

Page size
└─>64KB
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This feature enables 64KB pages support (4KB by default)
allowing only two levels of page tables and faster TLB
look-up. AArch32 emulation requires applications compiled
with 64K aligned segments.