Safety hypervisor function

A system that provides access protection, the system comprising:

• a computer processing unit (CPU) configured to encode a safety privilege level as a property of a transaction executed by the CPU, wherein the safety privilege level is indicative of safety properties suported by the CPU;
• a register coupled to the CPU;
• a register memory protection unit (register MPU) configured to:
• store a register private configuration describing one or more authorized safety privilege levels for the register;
• receive the transaction;
• identify the the safety privilege level encoded as the property of the transaction;
• compare the safety privilege level with the register private configuration;
• and
• grant access to the register in response to determining that the safety privilege level matches one of the authorized safety privilege levels for the register.