Not sure this can be achieved given that PSP is required for x86 core initialisation. Can you tell us what your concerns are with regards to keeping it enabled?
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This statement sums it up for me; "The PSP can execute system workloads as well as workloads provided by trusted third parties. - AMD"
Its just a nice thing to have for me, not like a hard requirement, but I thought since I disabled Intel Management Engine on my Thinkpad a year ago I might as well give PSP a try.
That's fair enough. I'll try to find out what these sorts of workloads are for peace of mind.
As far as I'm aware, this cannot be circumvented, though my information may be out of date. Maybe OpenSIL platforms will eliminate the need for PSP for core init altogether, but this is a ways away for client systems in any case.
A more pressing concern for me at the time of moving to AM5 was Pluton enablement, though it seems as though Pluton has mostly been abandoned by enterprise customers.
Interestingly, my client system has an option to enable this in its SBIOS, though it is thankfully disabled by default.
It's a glorified TPM, not quite the same as Intel ME.