[DeathArrow]

Does it use U-Boot or EFI?

[matthews2]

It uses U-Boot, but you can use U-Boot to launch an EFI executable.

https://docs.u-boot.org/en/latest/board/thead/lpi4a.html https://docs.u-boot.org/en/latest/usage/cmd/bootefi.html

[rwmj]

It can be both - uboot can emulate enough of EFI to start Linux.

[snvzz]

AIUI Linux boot flow with this SoC goes

internal rom -> u-boot SPL --> opensbi --> u-boot --> Linux

[BarsMonster]

In kernel config I see: CONFIG_EFI_STUB=y CONFIG_EFI=y

If that's what identifies it

[bradfa]

That just defines what the Linux kernel will be able to do, it doesn't necessarily imply that the hardware is using UEFI for firmware to launch another bootloader or OS.