RISC-V

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= RISC-V =

Ubuntu provides riscv64 architecture for the RISC-V platform since Focal release.

One can boot it on any system with qemu-system, or on bare-metal board such as those built by SiFive.

== Booting with qemu ==

 * Machine type `virt` aka `-machine virt`
 * Bios is OpenSBI (`apt install opensbi`) `-bios /usr/lib/riscv64-linux-gnu/opensbi/generic/fw_jump.elf`
 * "kernel" is qemu smode uboot (`apt install u-boot-qemu`) `-kernel /usr/lib/u-boot/qemu-riscv64_smode/uboot.elf`
 * And just the cloud image from http://cloud-images.ubuntu.com/

Working example with all the options is:

```
qemu-system-riscv64 \
-machine virt -m 2048 -smp 4 \
-bios /usr/lib/riscv64-linux-gnu/opensbi/generic/fw_jump.elf -kernel /usr/lib/u-boot/qemu-riscv64_smode/uboot.elf \
-device virtio-blk-device,drive=vda -drive file=livecd.ubuntu-cpc.img,id=vda -device virtio-net-device,netdev=eth0 -netdev user,id=eth0
```

Adjust to taste as needed. The image has a fallback cloud-init datasource that configures sudo user `ubuntu` with password `ubuntu`. Alternatively, you can provide a config drive (or tweak the first partitions `/var/lib/cloud/seed/nocloud/*` files) to setup anything else using cloud-init. For example ssh keys, disabling interactive login, and so on. See https://cloudinit.readthedocs.io/en/latest
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RISC-V (last edited 2025-02-07 13:36:10 by adrianoco)