RISC-V SBI console support

modulename: hvc_riscv_sbi.ko

configname: CONFIG_HVC_RISCV_SBI

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>RISC-V SBI console support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This enables support for console output via RISC-V SBI calls, which
is normally used only during boot to output printk.

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

source code: