LTS kernel Linux 4.14.290 unable to boot with edk2-ovmf (x86_64 UEFI runtime)

[Qu Wenruo]

Hi,

When backporting some btrfs specific patches to all LTS kernels, I found
v4.14.290 kernel unable to boot as a KVM guest with edk2-ovmf
(edk2-ovmf: 202205, qemu 7.0.0, libvirt 1:8.6.0).

While all other LTS/stable branches (4.19.x, 5.4.x, 5.10.x, 5.15.x,
5.18.x, 5.19.x) can boot without a hipccup.

I tried the following configs, but none of them can even provide an
early output:

- CONFIG_X86_VERBOSE_BOOTUP
- CONFIG_EARLY_PRINTK
- CONFIG_EARLY_PRINTK_EFI

Is this a known bug or something new?

Thanks,
Qu