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VMXON

Enables Virtual Machine Extensions (VMX) operation by loading the VMXON region physical address from the operand into the VMX-ON region pointer.

The table after the description covers what the source and destinations can be.

DO NOT support LOCK

VMXON SHALL only be executed in VMX basic operation. It is NOT supported in compatibility mode. The instruction SHALL be executed with CPL=0. If the processor is already in VMX operation, attempting to execute VMXON SHALL cause a #GP(0) exception.

The operand MUST be a 64-bit physical address of the VMXON region. This region MUST be 4KB-aligned. The memory region MUST be present and read/write accessible. Failure to meet alignment or accessibility requirements SHALL result in a #GP(0) exception. The VMXON region MUST be initialized according to the architectural specifications before execution to avoid undefined behavior.