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Date:   Mon, 22 Aug 2022 09:15:59 +0800
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To:     stable <stable@vger.kernel.org>
Cc:     "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-x86_64@vger.kernel.org
From:   Qu Wenruo <quwenruo.btrfs@gmx.com>
Subject: LTS kernel Linux 4.14.290 unable to boot with edk2-ovmf (x86_64 UEFI
 runtime)
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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