AMD PSB Vendor Locks EPYC CPUs for Enhanced Security at a Cost
Its not really vendor locking by design. It locks to a signing key. That key COULD be shared between vendors or even a single vendor could have multiple incompatible keys.It provides a mechanism to prove the entire boot process hasn't been tampered with, but I wish AMD provided a way to run these fused processors in a generic way without the security chain, with it just reporting that there isn't a secure root of trust. However I assume they are afraid of that allowing malicious code to fool deeper parts of the system without the system administrator knowing.So good for security, but bad for e-waste and second hand sales.