Index: sys/dev/hyperv/vmbus/vmbus.c
===================================================================
--- sys/dev/hyperv/vmbus/vmbus.c
+++ sys/dev/hyperv/vmbus/vmbus.c
@@ -97,6 +97,8 @@
 				    const struct hyperv_guid *);
 static uint32_t			vmbus_get_vcpu_id_method(device_t bus,
 				    device_t dev, int cpu);
+static struct taskqueue		*vmbus_get_eventtq_method(device_t, device_t,
+				    int);
 
 static int			vmbus_init(struct vmbus_softc *);
 static int			vmbus_connect(struct vmbus_softc *, uint32_t);
@@ -172,6 +174,7 @@
 	DEVMETHOD(vmbus_get_version,		vmbus_get_version_method),
 	DEVMETHOD(vmbus_probe_guid,		vmbus_probe_guid_method),
 	DEVMETHOD(vmbus_get_vcpu_id,		vmbus_get_vcpu_id_method),
+	DEVMETHOD(vmbus_get_event_taskq,	vmbus_get_eventtq_method),
 
 	DEVMETHOD_END
 };
@@ -1126,6 +1129,15 @@
 	return (VMBUS_PCPU_GET(sc, vcpuid, cpu));
 }
 
+static struct taskqueue *
+vmbus_get_eventtq_method(device_t bus, device_t dev __unused, int cpu)
+{
+	const struct vmbus_softc *sc = device_get_softc(bus);
+
+	KASSERT(cpu >= 0 && cpu < mp_ncpus, ("invalid cpu%d", cpu));
+	return (VMBUS_PCPU_GET(sc, event_tq, cpu));
+}
+
 #ifdef NEW_PCIB
 #define VTPM_BASE_ADDR 0xfed40000
 #define FOUR_GB (1ULL << 32)
Index: sys/dev/hyperv/vmbus/vmbus_if.m
===================================================================
--- sys/dev/hyperv/vmbus/vmbus_if.m
+++ sys/dev/hyperv/vmbus/vmbus_if.m
@@ -33,6 +33,7 @@
 
 HEADER {
 	struct hyperv_guid;
+	struct taskqueue;
 };
 
 METHOD uint32_t get_version {
@@ -51,3 +52,9 @@
 	device_t dev;
 	int cpu;
 };
+
+METHOD struct taskqueue * get_event_taskq {
+	device_t bus;
+	device_t dev;
+	int cpu;
+};