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

Apply T-Head cache management errata


Linux Kernel Configuration
└─>CPU errata selection
└─>Apply T-Head cache management errata
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
This will apply the cache management errata to handle the
non-standard handling on non-coherent operations on T-Head SoCs.

If you don't know what to do here, say "Y".