We should definitely make this configurable, at a minimum, yes.
BR, Kevin Townsend
On Fri, 11 Feb 2022 at 16:04, Anton Komlev via TF-M < tf-m@lists.trustedfirmware.org> wrote:
Hi,
Right. It should be upset to get a reboot after hours of a bug reproduction.
Shall we bring it as a topic to the forum next week to discuss the error handling and its configuration methods?
The best,
Anton
*From:* Andrej Butok via TF-M tf-m@lists.trustedfirmware.org *Sent:* Friday, February 11, 2022 1:52 PM *To:* Bøe, Sebastian Sebastian.Boe@nordicsemi.no *Cc:* tf-m@lists.trustedfirmware.org *Subject:* [TF-M] Re: halting or rebooting on faults
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:
https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/13839
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