CONFIG_CPU_LOONGSON3_CPUCFG_EMULATION is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

Emulate the CPUCFG instruction on older Loongson cores

modulename: cpucfg-emul.ko

configname: CONFIG_CPU_LOONGSON3_CPUCFG_EMULATION

CPU type
└─>Emulate the CPUCFG instruction on older Loongson cores
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Loongson-3A R4 and newer have the CPUCFG instruction available for
userland to query CPU capabilities, much like CPUID on x86. This
option provides emulation of the instruction on older Loongson
cores, back to Loongson-3A1000.

If unsure, please say Y.

source code: