Loongson Extend I/O Interrupt Controller

modulename: irq-loongson-eiointc.ko

configname: CONFIG_LOONGSON_EIOINTC

Linux Kernel Configuration
└─>Device Drivers
└─>IRQ chip support
└─>Loongson Extend I/O Interrupt Controller
In linux kernel since version 6 (release Date: 2022-10-02)  
Support for the Loongson3 Extend I/O Interrupt Vector Controller.

source code:
drivers/irqchip/irq-loongson-eiointc.c
selects
CONFIG_IRQ_DOMAIN_HIERARCHY
CONFIG_GENERIC_IRQ_CHIP