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VMXOFF
VMXOFF disables VMX operation. If VMX is currently enabled and the processor is operating in VMX root operation, the instruction transitions the processor to non-root operation and clears the VMX enabled state. If VMX is already disabled, the instruction is ignored.
The table below covers what the source and destinations can be.
| source | destination(s) |
|---|---|
| imm | #I |
| reg | #I |
| mN | #I |
DO NOT support LOCK
The instruction SHALL only be executed in VMX root operation. If executed in VMX non-root operation, a VM exit occurs. The instruction is not supported in compatibility mode.
The operand MUST be a 32-bit immediate value of 1. Any other value SHALL cause a #UD (Invalid Opcode) exception. Failure to provide the specific immediate value 1 will prevent the instruction from executing.