Jailhouse allows explicitly enabled cells to write character-wise
messages to the hypervisor debug console. Make use of this for a
platform-agnostic boot diagnosis channel, specifically for non-root
cells. This also comes with earlycon support.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
(cherry picked from commit 60685bd589aef4972d20724863079edf2039eaa2)
From http://git.kiszka.org/?p=linux.git;a=shortlog;h=refs/heads/queues/jailhouse
Jan Kiszka