Booting Linux kernel under UEFI hangs immediately after download

[NiKiZe]

Add a echo something before boot so you know the initrd download succeeds, or an imgstat might be interesting.

Something that I can think of is if secure boot is enabled (a few implementations I have used of efi allowed ipxe to boot, but not to boot anything from within ipxe)

Building with make DEBUG=efi_image should give you some more output on what it does directly before executing your efi kernel.