TF-A flow permits integrating up to 8 secure partitions to be:
-packaged by TF-A build flow
-loaded and authenticated by BL2
-consumed by an SPMC component.
Those 8 secure partitions are statically split into max. 4 signed by the platform owner, and max. 4 signed by the silicon provider.
This affects different parts of the TF-A build flow, secure partitions packaging tools, TBBR certificates:
This task is about improving flexibility with integrating more than 8 partitions. Possibly per platform.