CONFIG_CPU_HAS_TEE is not available for thedefaultarchitecture x86.
Result is shown for architecture csky

CPU has Trusted Execution Environment

configname: CONFIG_CPU_HAS_TEE

Linux Kernel Configuration
└─>Processor type and features
└─>CPU has Trusted Execution Environment
In linux kernel since version 4.2 (release Date: 2015-08-30)