CONFIG_RISCV_NONSTANDARD_CACHE_OPS is not available for thedefaultarchitecture x86.
Result is shown for architecture riscv

CONFIG_RISCV_NONSTANDARD_CACHE_OPS (not configurable)

modulename: cache-ops.ko

configname: CONFIG_RISCV_NONSTANDARD_CACHE_OPS

Linux Kernel Configuration
└─>RISCV_NONSTANDARD_CACHE_OPS
In linux kernel since version 4.14.327 (release Date: 2023-10-10)  
This enables function pointer support for non-standard noncoherent
systems to handle cache management.

source code:
arch/riscv/mm/cache-ops.c