Hello,

We (Nico/Raghu) have been implementing SEL0 partitions for Tegra platforms and recently hit an issue, where the “entrypoint-offset” field of the SP manifest [1] cannot cope with increasing manifest blobs. The way the SP manifest is created today, the “entrypoint-offset” field is set to a value *statically* by the implementer. Down the line if the manifest grows past the value written in the “entrypoint-offset”, we must manually update it. This needs to be fixed.

We believe there is an opportunity to upgrade the sptool to handle this situation during SP package creation, where sptool calculates the manifest size and bumps the “entrypoint-offset” past the end of the manifest. There are other ways of patching the SP manifest at runtime, but they seem sub-optimal.

Please let me know if there are other ideas to solve this problem. I will post a patch to update the sptool shortly but wanted to get the ball rolling.

Cheers.

[1] 14. FF-A manifest binding to device tree — Trusted Firmware-A documentation