On 4/4/22 18:41, Nicklas Larsson wrote:
Dear U-Boot community,
I have a default configuration based on 'efi-x86_payload64_defconfig' (64-bit EFI stub), to which I want to add the EFI_LOADER. In order to do so I also have to enable X86-64 to fulfill the "depends on" criterias in EFI_LOADER Kconfig. I'm doing this by setting X86_RUN_64BIT via the configuration editor.
This dramatically changes the default generated .config file and executing 'make' on top of this leaves me with a number of errors starting with:
[image: image.png]
Trying to resolve it just leads me to another error, and eventually I don't understand what to do.
Can someone guide me how to add the EFI Loader to my 64-bit EFI stubbed U-Boot? Is it possible?
Tried it on U-Boot master 2022.04-rc4 and the latest from next without success.
Thanks, Nicklas
Dear Simon,
As detailed in https://u-boot.readthedocs.io/en/latest/develop/uefi/u-boot_on_efi.html?high... both the x86 payload currently always runs U-Boot in 32 bit mode. If we ever wanted the payload started by a 64bit UEFI to boot 64bit software, we would need the payload itself to run in 64bit mode.
Do you have any plans for this?
@Nicklas:
Could you, please, describe what you need the payload for.
Best regards
Heinrich