linux-arkmicro/buildroot/configs/qemu_riscv32_virt_defconfig

# Architecture
BR2_riscv=y
BR2_RISCV_32=y

# System
BR2_SYSTEM_DHCP="eth0"
BR2_TARGET_GENERIC_GETTY=y
BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"

# Filesystem
BR2_TARGET_ROOTFS_EXT2=y

# Linux headers same as kernel, a 4.20 series
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_20=y

# Kernel
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_VERSION=y
BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.20.17"
BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/qemu/riscv32-virt/linux.config.fragment"
BR2_LINUX_KERNEL_IMAGE=y

# Bootloader
BR2_TARGET_OPENSBI=y
BR2_TARGET_OPENSBI_USE_PLAT=y
BR2_TARGET_OPENSBI_PLAT="qemu/virt"