On 11/9/21 18:55, Tom Rini wrote:
On Tue, Nov 09, 2021 at 11:19:01AM +0100, Heinrich Schuchardt wrote:
The UEFI specification requires for ExitBootServices() that "the boot
services watchdog timer is disabled". We already disable the software
watchdog. We should additionally disable the hardware watchdogs.
Reported-by: Andre Przywara <andre.przyw...@arm.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schucha...@canonical.com>
Let me start by saying thank you for bringing this up with UEFI folks as
well. To be clear, for right now I would much rather see U-Boot
continue to be non-complaint with UEFI in this regard and assume that a
running watchdog will be able to be handled by the running OS (which
tends to be the case, but not always as sunxi has just shown) than to
attempt to be complaint with the spec as it stands now as I am hopeful
that we can get this case handled in a way that matches long standing
industry practice.
We have either merge this patch or
[1/1] watchdog: don't autostart watchdog on Sunxi boards
https://patchwork.ozlabs.org/project/uboot/patch/20211105183431.117221-1-heinrich.schucha...@canonical.com/
or we will be breaking boot processes that have been running up to now.
As Sunxi watchdogs were only enabled by a recent patch disabling
autostart should not cause any harm.
If you want to be able to deviate from the UEFI spec, this should be
customizable and disabled by default.
Best regards
Heinrich
