Hi everyone,

SPM came at the begging of the project, so the design document was spread into several small pieces as features.

Now it is a chance to provide an overall document as we are going to have significant feature updates for FFM 1.1.

Here is the draft of the design document:

https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/9928

This document is trying to address the overall design for 1.1 much. It based on FFM 1.1 update alpha stage document. Several points:

• I want to publish this document public earlier for a quick taste, even though some features are not introduced yet (such as MMIOVEC), so there defecation would be some missing items, and I would keep updating recently.
• Meanwhile, I would collect feedbacks from you and update them into the design document, too.
• Prototype would be performed to see the situation.
• In this document I am trying to tell the conclusion directly instead of go over the conceptual items described in FF-M. If you can not find background either in this document or in the specification please tell me, I would try to add the missing part. Or if you think some text is quite redundant, tell me and I would remove the without hesitation.

The 1.1 specification (alpha): https://developer.arm.com/documentation/aes0039/latest

Please provide your feedback – both mailing list and patch are welcome (in the patch is more welcome, as there may be long discussions so patch comment is easier to be tracked).

Thanks!

/Ken