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[Bug 2055342] [NEW] Google cloud t2a VMs are unable to boot arm64 generic-64k kernels

To: canonical-ubuntu-qa@xxxxxxxxxxxxxxxxxxx
From: Francis Ginther <2055342@xxxxxxxxxxxxxxxxxx>
Date: Wed, 28 Feb 2024 19:47:49 -0000
Reply-to: Bug 2055342 <2055342@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx

Public bug reported:

This is not necessarily a bug, just an unsupported configuration.
Attempts to install and boot a generic-64k kernel on t2a instances
result in a failure. The collected console log states:

UEFI: Attempting to start image.
Description: ubuntu
FilePath: HD(15,GPT,D50A4893-6539-4486-920D-921ED26E81CB,0x800,0x31801)/\EFI\ubuntu\shimaa64.efi
OptionNumber: 2.

Loading Linux 5.15.0-100-generic-64k ...

Loading initial ramdisk ...

EFI stub: ERROR: This 64 KB granular kernel is not supported by your CPU
Application failed, r = 3

Failed to boot both default and fallback entries.

Press any key to continue...

The VM hangs at this point. This latest experiment was done with a jammy image using jammy/linux version 5.15.0-100.110.

** Affects: ubuntu-kernel-tests
Importance: Undecided
Status: New

** Attachment added: "t2a-standard-4-arm64-64k-console.log"
https://bugs.launchpad.net/bugs/2055342/+attachment/5750419/+files/t2a-standard-4-arm64-64k-console.log

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https://bugs.launchpad.net/bugs/2055342

Title:
Google cloud t2a VMs are unable to boot arm64 generic-64k kernels

Status in ubuntu-kernel-tests:
New

Bug description:
This is not necessarily a bug, just an unsupported configuration.
Attempts to install and boot a generic-64k kernel on t2a instances
result in a failure. The collected console log states: