[kevinoid]

This approach sounds similar to Petitboot <http://www.kernel.org/pub/linux/kernel/people/geoff/petitboo...> which is a kexec-based bootloader that I used on the Playstation 3 many years ago. Apparently it now targets many other systems and there is a (dead?) fork for Coreboot <https://github.com/ArthurHeymans/petitboot_for_coreboot>.

[hackernudes]

The Q&A mentions this[1] and says Petitboot requires two kernels (one minimal one + one normal one). NMBL just uses one single kernel for both steps.

[1] around 23m20s https://youtu.be/ywrSDLp926M?t=1400