[PATCH v3 0/6] Improved sysreset/watchdog uclass integration

Tom Rini trini at konsulko.com
Tue Nov 9 14:50:37 CET 2021

On Tue, Nov 09, 2021 at 09:00:05AM +0100, Heinrich Schuchardt wrote:

> > I am still puzzled about this, if I read the UEFI spec correctly, the
> > 5 minutes watchdog timer is for EFI applications using boot services?
> > So grub, for instance. But the description of ExitBootServices tells me
> > that the: "boot services watchdog timer is disabled"?
> > So it should not affect Linux booting (after the EFI stub is done)?
> Currently we only disable the software watchdog (efi_tpl = TPL_HIGH_LEVEL;)
> We should call wdt_stop_all() too. I will create a patch for that.

Lets use this as a chance to bring up the issue with the relevant part
of the UEFI forum.  Turning off a running watchdog is a bad idea in
places where Arm is pushing SystemReady IR (and I would argue other
specs as well, but..).

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