Function set_percpu_callback

freebsd/x86/xen/hvm.c:233–244

}

static int
set_percpu_callback(unsigned int vcpu)
{
	struct xen_hvm_evtchn_upcall_vector vec;
	int error;

	vec.vcpu = vcpu;
	vec.vector = IDT_EVTCHN;
	error = HYPERVISOR_hvm_op(HVMOP_set_evtchn_upcall_vector, &vec);

	return (error != 0 ? xen_translate_error(error) : 0);
}

/*
 * Tell the hypervisor how to contact us for event channel callbacks.