Secure processing environment measurement and attestation

A method comprising:

• invoking a first instruction to measure an initial build of a secure enclave;
• executing the first instruction to measure the initial build, including calculating a first measurement of the secure enclave and calculating a second measurement of the secure enclave;
• invoking the first instruction to measure a subsequent build of the secure enclave;
• executing the first instruction to measure the subsequent build, including calculating of the second measurement without calculation of the first measurement.

A system comprising:

• a system memory;
• and
• a processor including
• an instruction unit to receive an instruction associated with one of a build and a rebuild of a secure enclave using data from the system memory;
• and
• an execution unit to execute the instruction, wherein execution of the first instruction, when associated with the build, includes calculation of a first measurement of the secure enclave and calculation of a second measurement of the secure enclave, and when associated with the rebuild, includes calculation of the second measurement without calculation of the first measurement.