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docs: add example of building the Linux kernel #377

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8 changes: 7 additions & 1 deletion docs/platform/qemu_virt.md
Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,13 @@ qemu-system-riscv64 -M virt -m 256M -nographic \
**Linux Kernel Payload**

Note: We assume that the Linux kernel is compiled using
*arch/riscv/configs/defconfig*.
*arch/riscv/configs/defconfig*. The kernel must be a flattened image (a file called `Image`) rather than an ELF (`vmlinux`).

Example of building a Linux kernel:
```
make ARCH=riscv CROSS_COMPILE=riscv64-linux- defconfig
make ARCH=riscv CROSS_COMPILE=riscv64-linux- Image
```

Build:
```
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