diff --git a/app/test/virtual_pmd.c b/app/test/virtual_pmd.c
index 4831113..65b44c6 100644
--- a/app/test/virtual_pmd.c
+++ b/app/test/virtual_pmd.c
@@ -485,7 +485,7 @@ virtual_ethdev_simulate_link_status_interrupt(uint8_t port_id,
 
 	vrtl_eth_dev->data->dev_link.link_status = link_status;
 
-	_rte_eth_dev_callback_process(vrtl_eth_dev, RTE_ETH_EVENT_INTR_LSC);
+	_rte_eth_dev_callback_process(vrtl_eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 int
diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index fb4050c..8d510e3 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -1958,7 +1958,7 @@ bond_ethdev_delayed_lsc_propagation(void *arg)
 		return;
 
 	_rte_eth_dev_callback_process((struct rte_eth_dev *)arg,
-			RTE_ETH_EVENT_INTR_LSC);
+			RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 void
@@ -2079,7 +2079,7 @@ bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
 						(void *)bonded_eth_dev);
 			else
 				_rte_eth_dev_callback_process(bonded_eth_dev,
-						RTE_ETH_EVENT_INTR_LSC);
+						RTE_ETH_EVENT_INTR_LSC, NULL);
 
 		} else {
 			if (internals->link_down_delay_ms > 0)
@@ -2088,7 +2088,7 @@ bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
 						(void *)bonded_eth_dev);
 			else
 				_rte_eth_dev_callback_process(bonded_eth_dev,
-						RTE_ETH_EVENT_INTR_LSC);
+						RTE_ETH_EVENT_INTR_LSC, NULL);
 		}
 	}
 }
diff --git a/drivers/net/e1000/em_ethdev.c b/drivers/net/e1000/em_ethdev.c
index f767e1c..e13e858 100644
--- a/drivers/net/e1000/em_ethdev.c
+++ b/drivers/net/e1000/em_ethdev.c
@@ -1599,7 +1599,7 @@ eth_em_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
 
 	eth_em_interrupt_get_status(dev);
 	eth_em_interrupt_action(dev);
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 static int
diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index 5a1a83e..d9ab2df 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -2683,7 +2683,7 @@ eth_igb_interrupt_action(struct rte_eth_dev *dev)
 		E1000_WRITE_REG(hw, E1000_TCTL, tctl);
 		E1000_WRITE_REG(hw, E1000_RCTL, rctl);
 		E1000_WRITE_FLUSH(hw);
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 	}
 
 	return 0;
@@ -2743,7 +2743,7 @@ void igbvf_mbx_process(struct rte_eth_dev *dev)
 
 	/* PF reset VF event */
 	if (in_msg == E1000_PF_CONTROL_MSG)
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET, NULL);
 }
 
 static int
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 15a05b4..fb72491 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -436,7 +436,7 @@ enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 	vnic_intr_return_all_credits(&enic->intr);
 
 	enic_link_update(enic);
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 	enic_log_q_error(enic);
 }
 
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 697800e..d947760 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -5510,7 +5510,7 @@ i40e_dev_interrupt_delayed_handler(void *param)
 
 	/* handle the link up interrupt in an alarm callback */
 	i40e_dev_link_update(dev, 0);
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 
 	i40e_pf_enable_irq0(hw);
 	rte_intr_enable(&(dev->pci_dev->intr_handle));
@@ -5594,7 +5594,7 @@ i40e_dev_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
 			return;
 		else
 			_rte_eth_dev_callback_process(dev,
-				RTE_ETH_EVENT_INTR_LSC);
+				RTE_ETH_EVENT_INTR_LSC, NULL);
 	}
 
 done:
diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 34eb274..bd89cd9 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1341,7 +1341,7 @@ i40evf_handle_pf_event(__rte_unused struct rte_eth_dev *dev,
 	switch (pf_msg->event) {
 	case I40E_VIRTCHNL_EVENT_RESET_IMPENDING:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_RESET_IMPENDING event\n");
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET, NULL);
 		break;
 	case I40E_VIRTCHNL_EVENT_LINK_CHANGE:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_LINK_CHANGE event\n");
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 35281f9..b00aef3 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -3559,7 +3559,7 @@ ixgbe_dev_interrupt_delayed_handler(void *param)
 		ixgbe_dev_link_update(dev, 0);
 		intr->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
 		ixgbe_dev_link_status_print(dev);
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 	}
 
 	PMD_DRV_LOG(DEBUG, "enable intr in delayed handler S[%08x]", eicr);
@@ -7537,7 +7537,7 @@ static void ixgbevf_mbx_process(struct rte_eth_dev *dev)
 
 	/* PF reset VF event */
 	if (in_msg == IXGBE_PF_CONTROL_MSG)
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET, NULL);
 }
 
 static int
diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 1553b2e..3e57cca 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -5448,7 +5448,7 @@ mlx4_dev_link_status_handler(void *arg)
 	ret = priv_dev_link_status_handler(priv, dev);
 	priv_unlock(priv);
 	if (ret)
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 /**
@@ -5471,7 +5471,7 @@ mlx4_dev_interrupt_handler(struct rte_intr_handle *intr_handle, void *cb_arg)
 	ret = priv_dev_link_status_handler(priv, dev);
 	priv_unlock(priv);
 	if (ret)
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 /**
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index bf4232a..c76e754 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1069,7 +1069,7 @@ mlx5_dev_link_status_handler(void *arg)
 	ret = priv_dev_link_status_handler(priv, dev);
 	priv_unlock(priv);
 	if (ret)
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 /**
@@ -1092,7 +1092,7 @@ mlx5_dev_interrupt_handler(struct rte_intr_handle *intr_handle, void *cb_arg)
 	ret = priv_dev_link_status_handler(priv, dev);
 	priv_unlock(priv);
 	if (ret)
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 /**
diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index d526f34..a2b9056 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -1219,7 +1219,7 @@ nfp_net_dev_interrupt_delayed_handler(void *param)
 	struct rte_eth_dev *dev = (struct rte_eth_dev *)param;
 
 	nfp_net_link_update(dev, 0);
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 
 	nfp_net_dev_link_status_print(dev);
 
diff --git a/drivers/net/thunderx/nicvf_ethdev.c b/drivers/net/thunderx/nicvf_ethdev.c
index b758c9f..c61e171 100644
--- a/drivers/net/thunderx/nicvf_ethdev.c
+++ b/drivers/net/thunderx/nicvf_ethdev.c
@@ -108,7 +108,7 @@ nicvf_interrupt(void *arg)
 			nicvf_set_eth_link_status(nic,
 					&nic->eth_dev->data->dev_link);
 		_rte_eth_dev_callback_process(nic->eth_dev,
-				RTE_ETH_EVENT_INTR_LSC);
+				RTE_ETH_EVENT_INTR_LSC, NULL);
 	}
 
 	rte_eal_alarm_set(NICVF_INTR_POLL_INTERVAL_MS * 1000,
diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
index c1d09a0..18a0c10 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -559,7 +559,7 @@ new_device(int vid)
 
 	RTE_LOG(INFO, PMD, "New connection established\n");
 
-	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC);
+	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 
 	return 0;
 }
@@ -626,7 +626,7 @@ destroy_device(int vid)
 
 	RTE_LOG(INFO, PMD, "Connection closed\n");
 
-	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC);
+	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 static int
@@ -655,7 +655,7 @@ vring_state_changed(int vid, uint16_t vring, int enable)
 	RTE_LOG(INFO, PMD, "vring%u is %s\n",
 			vring, enable ? "enabled" : "disabled");
 
-	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE);
+	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE, NULL);
 
 	return 0;
 }
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index b4dfc0a..2f0065a 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1103,7 +1103,7 @@ virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
 	if (isr & VIRTIO_PCI_ISR_CONFIG) {
 		if (virtio_dev_link_update(dev, 0) == 0)
 			_rte_eth_dev_callback_process(dev,
-						      RTE_ETH_EVENT_INTR_LSC);
+						      RTE_ETH_EVENT_INTR_LSC, NULL);
 	}
 
 }
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index c517e88..13ba70d 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -2508,7 +2508,7 @@ rte_eth_dev_callback_unregister(uint8_t port_id,
 
 void
 _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
-	enum rte_eth_event_type event)
+	enum rte_eth_event_type event, void *cb_arg)
 {
 	struct rte_eth_dev_callback *cb_lst;
 	struct rte_eth_dev_callback dev_cb;
@@ -2519,6 +2519,9 @@ _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
 			continue;
 		dev_cb = *cb_lst;
 		cb_lst->active = 1;
+		if (cb_arg != NULL)
+			dev_cb.cb_arg = (void *) cb_arg;
+
 		rte_spinlock_unlock(&rte_eth_dev_cb_lock);
 		dev_cb.cb_fn(dev->data->port_id, dev_cb.event,
 						dev_cb.cb_arg);
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 7218b6f..6667655 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -3026,6 +3026,7 @@ enum rte_eth_event_type {
 				/**< queue state event (enabled/disabled) */
 	RTE_ETH_EVENT_INTR_RESET,
 			/**< reset interrupt event, sent to VF on PF reset */
+	RTE_ETH_EVENT_VF_MBOX,  /**< message from the VF received by PF */
 	RTE_ETH_EVENT_MAX       /**< max value of this enum */
 };
 
@@ -3047,6 +3048,11 @@ typedef void (*rte_eth_dev_cb_fn)(uint8_t port_id, \
  * @param cb_arg
  *  Pointer to the parameters for the registered callback.
  *
+ *  The user data is overwritten in the case of RTE_ETH_EVENT_VF_MBOX.
+ *	This even occurs when a message from the VF is received by the PF.
+ *	The user data is overwritten with struct rte_pmd_ixgbe_mb_event_param.
+ *	This struct is defined in rte_pmd_ixgbe.h.
+ *
  * @return
  *  - On success, zero.
  *  - On failure, a negative value.
@@ -3085,12 +3091,16 @@ int rte_eth_dev_callback_unregister(uint8_t port_id,
  *  Pointer to struct rte_eth_dev.
  * @param event
  *  Eth device interrupt event type.
+ * @param cb_arg
+ *  Update callback parameter to pass data back to user application.
+ *  This allows the user application to decide if a particular function
+ *  is permitted or not.
  *
  * @return
  *  void
  */
 void _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
-				enum rte_eth_event_type event);
+				enum rte_eth_event_type event, void *cb_arg);
 
 /**
  * When there is no rx packet coming in Rx Queue for a long time, we can
