Why do I need an UEFI shell to implement Linuxboot, and the system doesn't need an UEFI shell to boot, and if there is no UEFI shell in a bios file, then do I need to provide a bios file with an UEFI shell? In fact, I did the same, and asked the producer to recompile a bios file with an uefi shell for me. If I could I want to know the order in which Linuxboot is executed (I only know that Linuxboot is executed as an efi file).Thanks!