This patch will add a new system reset function for SPM without using the existing platform_hal_system_reset(). The basic thinking is to create a dedicated HAL function for SPM to split with services, and not affect the secure partition work.

I am not sure if this will bring some problems or any potential risk for platform porting.

Please give feedback about this in this mail thread.

Thanks,

Edison

From: TF-M <tf-m-bounces@lists.trustedfirmware.org> On Behalf Of Edison Ai via TF-M
Sent: Monday, December 30, 2019 3:43 PM
To: 'tf-m@lists.trustedfirmware.org' <tf-m@lists.trustedfirmware.org>
Cc: nd <nd@arm.com>
Subject: [TF-M] System reset SPM HAL function

Hi All,

To align with PSA FF 1.0.0, the SPM needs to restart the entire system when some programmer error or panics are detected. So I had upstream a patch to add a system reset HAL function for SPM: https://review.trustedfirmware.org/#/c/trusted-firmware-m/+/2780/.

The basic idea is to add a weak common function so that the platform can use this weak function to do reset. Please note, the platform needs to add its own implementation if there is any different.

Unfortunately, there is no such test to test the system reset function curreetly. So please call psa_panic() in secure services for simple testing based on the top of this link: https://review.trustedfirmware.org/#/q/topic:tfm_panic+(status:open+OR+status:merged).

You can send mail or add comments directly in patches if you have any questions or comments.

Thanks,

Edison