CONFIG_CPU_SHX2 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

CONFIG_CPU_SHX2 (not configurable)

configname: CONFIG_CPU_SHX2

Linux Kernel Configuration
└─>Processor selection
└─>CPU_SHX2
In linux kernel since version 2.6.20 (release Date: 2007-02-04)