Disable lockdown while keeping SecureBoot enabled

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Hello,

Since `5f56a74cc0a6d9b9f8ba89cea29cd7c4774cb2b1`[1] I can't have both
SecureBoot enabled and lockdown disabled (I need to do that to allow
undervolting on my intel laptop).

My current bootchain is:

systemd-boot -> kernel+initrd+cmdline as a unified kernel image and
signed using a personal custom key. I don't use the shim loader.

Until now I disabled the lockdown by setting the `MokSBState` +
`MokSBStateRT` UEFI variables to 1. Now they need to be volatile.

Would you be open to either add a variable or a command-line argument to
disable the kernel lockdown while keeping SecureBoot enabled ? If so
what would be the right way to express it ?

Thanks,

[1]: https://lore.kernel.org/linux-efi/20220920153743.3598053-1-ardb@xxxxxxxxxx/

-- 
Antoine 'xdbob' Damhet

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