[[!meta title="NetBSD/riscv under QEMU"]]

This page attempts to document running NetBSD/riscv under the
[QEMU](http://www.qemu.org/) open source processor emulator.
This can be extremely useful for development and testing.

# Requirements
* qemu 6.2.0 (tested) or higher
* disk image
  * [NetBSD current riscv64.img.gz](https://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/latest/riscv-riscv64/binary/gzimg/riscv64.img.gz)
* kernel image
  * [NetBSD current kernel](https://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/latest/riscv-riscv64/binary/kernel/netbsd-GENERIC64.gz)


# Installing QEMU on NetBSD
You can install latest qemu with the following commands.
It is assumed that your pkgsrc tree is in /usr/pkgsrc directory.

    # cd /usr/pkgsrc/emulators/qemu
    # make install

# Preparing the disk image and kernel

The disk image (riscv64.img.gz) must first be uncompressed. The *qemu-img* tool can then resize the image to the desired size. On first boot, NetBSD will grow the root file-system to match the size of the disk.

    $ gunzip netbsd-GENERIC64.gz 
    $ gunzip riscv64.img.gz
    $ qemu-img resize riscv64.img 20g

# Booting the system (riscv64)

    $ qemu-system-riscv64 \
          -M virt \
          -m 4g \
          -kernel netbsd-GENERIC64 \
          -drive if=none,file=riscv64.img,id=hd0,format=raw \
          -device virtio-blk-device,drive=hd0 \
          -device virtio-rng-device \
          -netdev type=user,id=net0 \
          -device virtio-net-device,netdev=net0,mac=00:11:22:33:44:55 \
          -append "root=dk1" \
          -nographic