Nah, I don't think there's a way to disable PSP on ryzen.

There was a talk at ccc last year by a group dissecting the psp[1].

It would not be a stretch to say that eventually it will be possible.

[1]:https://media.ccc.de/v/thms-38-dissecting-the-amd-platform-s...

Hello,

Disabling PSP in such a case would be subjective. Ryzen doesn't support cache as RAM anymore, with the PSP doing RAM initialization. The furthest that you'd be able to is getting a minimal PSP firmware that only handles system bringup.

Some OEMs currently propose an option to disable the PSP <-> main processor communication interface during bootup.

Would that proposed option disable PSP main memory access? It’s access to system memory + access to PCI devices (networking) that most concerns me.

I would gladly pay an extra $50 for a variant of the CPU without PSP.