This content has not been validated; it was AI-generated following the x86-64 ISA Documentation generation process to maintain high quality. However, as no human has verified this data, errors may exist. If the accuracy of this data is critical, please consult the Intel SDM. The model used to generate this is gemma4:31b

ENCLSEMODPR

ENCLS (Enter Conditional Cloaking State) is used to enter a conditional cloaking state by specifying a target state via the operand. The instruction transitions the processor into a state where memory accesses are restricted based on the provided parameters, typically used in conjunction with Intel® SGX.

The following table covers what the source and destinations can be.

DO NOT support LOCK

This instruction SHALL only be executed in CPL3. It is NOT available in compatibility mode. The instruction requires the processor to be in a state that supports the specific cloaking extension; otherwise, it SHALL trigger a general protection exception (#GP).

To avoid unexpected behavior or processor exceptions, the user MUST ensure that the operand provided matches a valid state transition value defined by the hardware implementation. Providing an invalid immediate value SHALL result in an undefined state or a #GP.