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
ENCLV
Enter Callout Volume. This instruction is used to enter a callout volume, allowing the processor to execute a specific set of functions within a secure enclave. It validates the target callout volume and transfers execution to the specified entry point.
The table after the description covers what the source and destinations can be.
| source | destination(s) |
|---|---|
| imm | #I |
| reg | #I |
| mN | #I |
DO NOT support LOCK
This instruction is ONLY available when the processor is operating in 64-bit mode. It is NOT supported in compatibility mode.
The instruction requires that the processor is currently executing within a secure enclave context. If the processor is not in enclave mode, the instruction SHALL trigger a general protection fault (#GP).
To avoid execution failures, ensure that the target callout volume is correctly configured in the enclave's metadata and that the entry point is valid and aligned. Failure to provide a valid target volume SHALL result in an error code returned in the destination register.