Agree,
In our TM-M code we have replaced the reset to a loop, to avoid annoying infinite reboots.
Thanks,
Andrej
From: Bøe, Sebastian via TF-M <tf-m@lists.trustedfirmware.org>
Sent: Friday, February 11, 2022 2:44 PM
To: tf-m@lists.trustedfirmware.org
Subject: [TF-M] halting or rebooting on faults
Hi,
it seems we could try to be more consistent with fault handling.
The current default behaviour is:
Error code returned from an SPE function? Reboot.
MemFault/HardFault/SecureFault in the SPE? Halt.
Null-pointer dereference from the NSPE? (results in a secure fault for cortex-m) Halt.
Should we perhaps consistently halt or consistently reboot for these three cases
and allow this to be configurable?
It is not clear to me why an error returned from a function results in a reboot, whereas a Hardfault does not.
They both indicate a fault in the SPE.
At the very least the behaviour should be configurable, which this PR is a step towards: