How do you read that as a software stack when they literally are talking about how servers get high speed validation done in the supply chain, etc. They literally say the PCC node is a server.
But the non target ability and everything they talk about is only achievable on these nodes. There is certainly software on that. But the software will not run on any other node.
"
Introducing Private Cloud Compute nodes
The root of trust for Private Cloud Compute is our compute node: custom-built server hardware that brings the power and security of Apple silicon to the data center, with the same hardware security technologies used in iPhone, including the
Secure Enclave and
Secure Boot.
"
Also, WSJ did a video interview and they literally pointed at servers and said these are PCC nodes.
It's also predicated on a Darwin based kernel as there are heavy kernel interactions.
But yes, PCC is 100% servers built and designed by Apple running in Apple data centers.