vof-nvram.bin: what it is and how it is used?

[Michael Tokarev]

Hi!

Commit fc8c745d50150a63f6c "spapr: Implement Open Firmware client interface"
in Jun-2021 added a new file, pc-bios/vof-nvram.bin, to qemu sources.

But there's nothing in the sources which refers to this file, and there's
no mentions about its contents and how it has been generated.

What's the procedure to create this image?  It would be great if such
procedure can be run during package build time to generate this image anew.

How it is supposed to be used?

Should it be shipped in a downstream distribution?

Thanks,

/mjt