On Tue, Jun 29, 2021 at 02:23:15PM +0200, Heinrich Schuchardt wrote:
> On 6/29/21 12:48 PM, François Ozog wrote:
> > Hi
> >
> > Following a discussion with Civil Infrastructure Project TSC, there is
> > a watchdog protection issue with EFI: the time between the call to
> > ExitBootService and Linux kernel takes over watchdog service is not
> > covered by any watchdog protection.
>
> The UEFI specification requires a watchdog. So this must be an
> implementation specific problem. Which firmware-hardware combination are
> you referring to?
>
> U-Boot provides hardware watchdogs.

Without side-tracking things too much, I do want to note the last time
within U-Boot we talked about watchdogs and UEFI specification, I
believe there was still some doubt how hardware watchdogs are handled vs
the notion of a software watchdog, and it should probably be clarified
which things we're talking about here.

--
Tom