The top-level issue says:
Most likely, this will include adding implementation for newer AMD CPUs that require communication with PSP, as described in https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/user-guides/58453.pdf
This issue is meant to gather the current state of support for AMD, and listing the required steps to implement it (if any).
The top-level issue says:
This issue is meant to gather the current state of support for AMD, and listing the required steps to implement it (if any).