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Neoverse N1 microarchitecture ISA support

Greetings,

I have a few questions regarding the Neoverse N1. According to the specifications, it mainly uses the ARMV8.2 ISA. However, there is possible support also for other instructions in other ISAs such as v8.4, v8.5 and cryptographic extensions. I also read in the cryptographic technical manual that those are licensed separately. How does that work? Are these added in by ARM? If so, is it possible to add support for other instructions from v8.3 for example? Specifically, I am interested in hardware support for the pointer authentication (PAC) instructions from v8.3. Thank you for your help and support.

Best regards,

Mohannad Ismail

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