| # Hafnium RAM disk |
| |
| Hafnium expects to find the following files in the root directory of its RAM |
| disk: |
| |
| * `manifest.dtb` -- configuration file in DeviceTree format (required) |
| * kernels for the VMs, whose names are described in the manifest (optional) |
| * initrd of the primary VM, whose name is described in the manifest (optional) |
| |
| Follow the [preparing Linux](PreparingLinux.md) instructions to produce |
| `vmlinuz` and `initrd.img` for a basic Linux primary VM. |
| |
| ## Create a RAM disk for Hafnium |
| |
| Assuming that a subdirectory called `initrd` contains the files listed in the |
| previous section, we can build `initrd.img` with the following command: |
| |
| ```shell |
| cd initrd; find . | cpio -o > ../initrd.img; cd - |
| ``` |
