Technical question Orin Nano EDK2 UEFI

Robotics & Edge Computing Jetson Systems Jetson Orin Nano
1

Hello team,
I want to ask about EDK2-nvidia question. EFI variable is stored in QSPI is it read/write via OPTEE as I understand correctly or EDK2 read/write directly into flash?

Thanks.

2

Hello,

Thanks for visiting the NVIDIA Developer Forums.
To ensure better visibility and support, I’ve moved your post to the Jetson category where it’s more appropriate

Cheers,
Tom

6

hello anhhao.hcmus,

please refer to developer guide, Set the UEFI Variable in the Recovery Kernel Shell.
BTW, here’re variables defined by NVIDIA UEFI, please see-also NVIDIA Defined variables.

7

Thank you for your feedback.
We know these variable come from EFI variable, but we’re trying to understand this variable is stored elsewhere. is it from QSPI or other resource that NVIDIA doesn’t want user aware..

8

hello anhhao.hcmus,

for Orin Nano, the EFI variables are stored in the on-module QSPI NOR in a dedicated uefi_variables partition. you may dig into flash logs for details, BTW.
as mentioned above, in post #6, you may mount the efivarfs, so that you’ll be able to view/edit EFI variables from Linux.