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.