CONFIG_AS_HAS_LSX_EXTENSION is not available for thedefaultarchitecture x86.
Result is shown for architecture loongarch

CONFIG_AS_HAS_LSX_EXTENSION (not configurable)

configname: CONFIG_AS_HAS_LSX_EXTENSION

Linux Kernel Configuration
└─>AS_HAS_LSX_EXTENSION
In linux kernel since version 6.5 (release Date: 2023-08-27)