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A comment on Lenovo vendor locking Ryzen CPUs with AMD PSB. Parent comment

Re:Lenovo vendor locking Ryzen CPUs with AMD PSB by amluto on Sunday January 16, 2022 @02:56PM (#29959339)
Intel’s or AMD’s assistance is not needed at all. There is a rather boring flash chip connected by SPI to the CPU and/or PCH. One could interpose a microcontroller that verifies whatever it pleases on that SPI link.
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Re:Lenovo vendor locking Ryzen CPUs with AMD PSB by my123 on Sunday January 16, 2022 @03:08PM (#29959450)
That’s the approach used by the Apple T2. On the Intel side, it’s the chipset soldered on the motherboard which does that verification, so CPU swapping isn’t affected.
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