ACK: [SRU][O:raspi/N:raspi][PATCH 0/2] CONFIG_EFI_STUB support disabled since 6.5.0-1002.2 (LP: #2053147)

[Kuba Pawlak]

On 24.02.2025 15:11, Juerg Haefliger wrote:
> BugLink: https://bugs.launchpad.net/bugs/2053147
>
> [Impact]
>
> Looks like since commmit 0d02ca7853f4e487ff8b912b0d1d43ceb31a528b
> (https://git.launchpad.net/ubuntu/+source/linux-raspi/commit/?h=applied/ubuntu/d
> evel&id=0d02ca7853f4e487ff8b912b0d1d43ceb31a528b) The support for EFI in the
> kernel config was disabled with no mention of why:
>
> """
> - [Config] raspi: Set EFI=n
> """
>
> This disables support for CONFIG_EFI_STUB which means that the kernel cannot be
> loaded via EFI directly.
>
> Any reasons for this? We are booting RPI by setting u-boot to launch in EFI
> mode, which runs grub.efi and then we load our entries from there, but this
> totally breaks support for that.
>
> This worked until the previous kernel version with no issues that we could find.
> Is there anything we can do to revert this and re-enable this option int he
> kernel?
>
> [Fix]
>
> Re-enable CONFIG_EFI.
>
> [Test Case]
>
> Boot kernel via EFI.
>
> [Where Problems Could Occur]
>
> Boot issues with the official non-EFI Raspberry Pi firmware/bootloader.
> Additional interference due to new and/or changed config options.
>
> [Notes]
>
> Booting via EFI is not officially supported by Canonical. We're re-enabling this
> option as a courtesy to our users. We will turn it back off if it introduces
> problems.
>
Acked-by: Kuba Pawlak <kuba.pawlak at canonical.com>
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