Hi Ard > -----Original Message----- [...] > As your suggested (comment above execute_with_initialized_rng in latest > kernel): > The efibootmgr -t X will be hung. Looks like one certain commit before your > patch broke the set_variable efi call. I will dig into the further debug and tell > you the result. The root cause of the hung IMO might be similar to commit 550b33cfd445296868a478e8413ffb2e963eed32 Author: Ard Biesheuvel <ardb@xxxxxxxxxx> Date: Thu Nov 10 10:36:20 2022 +0100 arm64: efi: Force the use of SetVirtualAddressMap() on Altra machines Do you agree with the idea if I add Ampere ”eMAG” machine into the list of Using SetVirtualAddressMap() forcibly? Please note that even in previous kernel patch, the efibootmgr -t 10 will make kernel hung if I passed "efi=novamap" to the boot parameter. -- Cheers, Justin (Jia He)