CONFIG_CPU_MIPSR2_IRQ_EI is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
CONFIG_CPU_MIPSR2_IRQ_EI (not configurable)
configname: CONFIG_CPU_MIPSR2_IRQ_EI
Linux/MIPS Kernel Configuration
└─>Kernel type
└─>CPU_MIPSR2_IRQ_EI