Hi all,

I am proposing a couple of changes to the standard PSA headers in TF-M.

The first change is here: https://review.trustedfirmware.org/c/trusted-firmware-m/+/1458/

It renames the standard PSA headers in TF-M from psa_<api>.h to psa/<api>.h. TF-M defined headers are not affected. This change also tweaks a large number of #includes across the TF-M repo to use the new names. Any code maintained outside the TF-M repo that includes PSA headers from TF-M will also need to be changed to use the new names in #includes once this is merged.

The benefit of this change is that is brings the names of the headers in TF-M into agreement with the names used in the PSA Firmware Framework. It will also make running the PSA API tests easier, as the step of copying the PSA headers to the standard names is no longer required.

The second change is here: https://review.trustedfirmware.org/c/trusted-firmware-m/+/1459/

It adds a copy of the psa/error.h header, which contains new standard error codes intended to be used by the SPM and RoT Services. The "PSA_SUCCESS" and "psa_status_t" definitions are also moved to this header, and it is included by psa/client.h and psa/service.h.

This change should have minimal impact on other code -- no code is immediately changed to use the new error codes, but upstreaming the header now allows services to start using the new error codes when needed.

Kind regards, Jamie