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Currently, the VM_EVENT_INTERFACE_VERSION is determined at runtime, by inspecting the corresponding field in a vm_event_request. This helper opcode will query the hypervisor supported version before the vm_event related structures and layout are set-up. Signed-off-by: Petre Pircalabu <ppircalabu@bitdefender.com> Acked-by: Jan Beulich <jbeulich@suse.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Acked-by: Tamas K Lengyel <tamas@tklengyel.com>