HYPERVISOR_physdev_op  549 arch/x86/xen/enlighten.c 	HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
HYPERVISOR_physdev_op  173 arch/x86/xen/setup.c 	rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);