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docs(README): add 64-bit RISC-V QEMU instructions #345

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May 27, 2024
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docs(README): add 64-bit RISC-V QEMU instructions #345

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27 changes: 27 additions & 0 deletions README.md
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Expand Up @@ -67,6 +67,33 @@ qemu-system-aarch64 \
-device guest-loader,addr=0x48000000,initrd=<APP>
```

### 64-bit RISC-V

For 64-bit RISC-V, we need a recent version of [OpenSBI].
To download the release asset with [GitHub CLI] and extract the correct binary, run:

```bash
gh release download v1.4 --repo riscv-software-src/opensbi --pattern 'opensbi-*-rv-bin.tar.xz'
tar -xvf opensbi-*-rv-bin.tar.xz opensbi-1.4-rv-bin/share/opensbi/lp64/generic/firmware/fw_jump.bin
```

[OpenSBI]: https://github.com/riscv-software-src/opensbi
[GitHub CLI]: https://cli.github.com/

The QEMU base command is as follows:

```bash
qemu-system-riscv64 \
-machine virt \
-cpu rv64 \
-smp 1 \
-m 128M \
-display none -serial stdio \
-bios opensbi-1.4-rv-bin/share/opensbi/lp64/generic/firmware/fw_jump.bin
-kernel <LOADER>
-initrd <APP>
```

### Debugging

You can use QEMU to debug the loaded Hermit images:
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