u-boot environment on x86

AKASHI Takahiro takahiro.akashi at linaro.org
Tue Mar 31 04:20:50 CEST 2020

On Fri, Mar 27, 2020 at 01:26:09PM +0000, Kim Bøndergaard wrote:
> I'm struggling with a u-boot as an uefi overlay on x86 (currently Qemu).
> Basically it is working, but I'm  now considering how /where to store my u-boot environment.
> I need to have it stored in a device being accessible also from my Linux being installed by u-boot.
> Anyone having had similar considerations.

Can fw_printenv/fw_setenv under tools be a solution to your issue?
(I've never used those commands though.)

> I feel storing the environment in e.g. a FAT file is not the right solution. It is too vulnerable to power loss.
> I'd prefer e.g. a raw sd partition, but u-boot has no means to read it right now. Making support for that would be quite easy I think.
> Alternatively I know the UEFI provides means to store "UEFI variables". Anyone who knows if adding the environment as a huge UEFI variable is a way to go?

Any reason to stick to UEFI here?

-Takahiro Akashi

> Comments are welcome
> Kim Bøndergaard
> Prevas A/S
> Team Manager / Systems Architect
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