CONFIG_SIBYTE_CFE is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_SIBYTE_CFE.
Result is shown for kernelversion 5.4.123
Booting from CFE
configname: CONFIG_SIBYTE_CFE
Linux/MIPS Kernel Configuration
└─>Machine selection
└─>Booting from CFE
In linux kernel since version 2.6.12
Make use of the CFE API for enumerating available memory,
controlling secondary CPUs, and possibly console output.
controlling secondary CPUs, and possibly console output.