[PATCH 1/1] efi_loader: stop watchdogs in ExitBootServices()

Michael Walle michael at walle.cc
Tue Feb 7 16:34:30 CET 2023

>>>> Basically I want the following:
>>>> (1) board boots with watchdog enabled
>>>> (2) u-boot services watchdog
>>>> (3a) booting embedded linux with booti (watchdog enabled) or
>>>> (3b) booting generic OS with bootefi (watchdog disabled)
>>>> The missing case is booting an embedded linux with bootefi, which
>>>> would be nice to have. But I don't really see it as a use-case for
>>>> our board.
>>> For SUNXI boards disabling CONFIG_WATCHDOG_AUTOSTART solved the
>>> problem with the very short maximum expiration time of the watchdog.
>> I can't follow you here. What "very short maximum expiration time"?
>> With CONFIG_WATCHDOG_AUTOSTART disabled, the watchdog won't be kicked
>> by u-boot, right? wdt->running will never be set to true and
>> wdt_cyclic() will be a noop.
> The sunxi boards failed to boot with CONFIG_WATCHDOG_AUTOSTART because
> 16s is too short for Linux to install a watchdog driver. With
> CONFIG_WATCHDOG_AUTOSTART=n the watchdog is not running and the boards
> boot.

But how does that help in my case?


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