diff --git a/lib/librte_eal/bsdapp/eal/include/exec-env/rte_interrupts.h b/lib/librte_eal/bsdapp/eal/include/exec-env/rte_interrupts.h
index c1995ee12..64f8e1eb3 100644
--- a/lib/librte_eal/bsdapp/eal/include/exec-env/rte_interrupts.h
+++ b/lib/librte_eal/bsdapp/eal/include/exec-env/rte_interrupts.h
@@ -35,31 +35,124 @@
 #error "don't include this file directly, please include generic <rte_interrupts.h>"
 #endif
 
-#ifndef _RTE_BSDAPP_INTERRUPTS_H_
-#define _RTE_BSDAPP_INTERRUPTS_H_
+#ifndef _RTE_EAL_INTERRUPTS_H_
+#define _RTE_EAL_INTERRUPTS_H_
 
+#define RTE_MAX_RXTX_INTR_VEC_ID     32
 #define RTE_INTR_VEC_ZERO_OFFSET      0
 #define RTE_INTR_VEC_RXTX_OFFSET      1
 
-#define RTE_MAX_RXTX_INTR_VEC_ID     32
-
+/**
+ * The interrupt source type, e.g. UIO, VFIO, ALARM etc.
+ */
 enum rte_intr_handle_type {
-	RTE_INTR_HANDLE_UNKNOWN = 0,
-	RTE_INTR_HANDLE_UIO,      /**< uio device handle */
-	RTE_INTR_HANDLE_ALARM,    /**< alarm handle */
-	RTE_INTR_HANDLE_MAX
+	RTE_INTR_HANDLE_UNKNOWN = 0,  /**< generic unknown handle */
+	RTE_INTR_HANDLE_UIO,          /**< uio device handle */
+	RTE_INTR_HANDLE_UIO_INTX,     /**< uio generic handle */
+	RTE_INTR_HANDLE_VFIO_LEGACY,  /**< vfio device handle (legacy) */
+	RTE_INTR_HANDLE_VFIO_MSI,     /**< vfio device handle (MSI) */
+	RTE_INTR_HANDLE_VFIO_MSIX,    /**< vfio device handle (MSIX) */
+	RTE_INTR_HANDLE_ALARM,        /**< alarm handle */
+	RTE_INTR_HANDLE_EXT,          /**< external handler */
+	RTE_INTR_HANDLE_VDEV,         /**< virtual device */
+	RTE_INTR_HANDLE_MAX           /**< count of elements */
+};
+
+#define RTE_INTR_EVENT_ADD            1UL
+#define RTE_INTR_EVENT_DEL            2UL
+
+typedef void (*rte_intr_event_cb_t)(int fd, void *arg);
+
+struct rte_epoll_data {
+	uint32_t event;               /**< event type */
+	void *data;                   /**< User data */
+	rte_intr_event_cb_t cb_fun;   /**< IN: callback fun */
+	void *cb_arg;	              /**< IN: callback arg */
+};
+
+enum {
+	RTE_EPOLL_INVALID = 0,
+	RTE_EPOLL_VALID,
+	RTE_EPOLL_EXEC,
+};
+
+/** interrupt epoll event obj, taken by epoll_event.ptr */
+struct rte_epoll_event {
+	volatile uint32_t status;  /**< OUT: event status */
+	int fd;                    /**< OUT: event fd */
+	int epfd;       /**< OUT: epoll instance the ev associated with */
+	struct rte_epoll_data epdata;
 };
 
 /** Handle for interrupts. */
 struct rte_intr_handle {
-	int fd;                          /**< file descriptor */
-	int uio_cfg_fd;                  /**< UIO config file descriptor */
+	RTE_STD_C11
+	union {
+		int vfio_dev_fd;  /**< VFIO device file descriptor */
+		int uio_cfg_fd;  /**< UIO cfg file desc for uio_pci_generic */
+	};
+	int fd;	 /**< interrupt event file descriptor */
 	enum rte_intr_handle_type type;  /**< handle type */
-	int max_intr;                    /**< max interrupt requested */
-	uint32_t nb_efd;                 /**< number of available efds */
-	int *intr_vec;                   /**< intr vector number array */
+	uint32_t max_intr;             /**< max interrupt requested */
+	uint32_t nb_efd;               /**< number of available efd(event fd) */
+	int efds[RTE_MAX_RXTX_INTR_VEC_ID];  /**< intr vectors/efds mapping */
+	struct rte_epoll_event elist[RTE_MAX_RXTX_INTR_VEC_ID];
+				       /**< intr vector epoll event */
+	int *intr_vec;                 /**< intr vector number array */
 };
 
+#define RTE_EPOLL_PER_THREAD        -1  /**< to hint using per thread epfd */
+
+/**
+ * It waits for events on the epoll instance.
+ *
+ * @param epfd
+ *   Epoll instance fd on which the caller wait for events.
+ * @param events
+ *   Memory area contains the events that will be available for the caller.
+ * @param maxevents
+ *   Up to maxevents are returned, must greater than zero.
+ * @param timeout
+ *   Specifying a timeout of -1 causes a block indefinitely.
+ *   Specifying a timeout equal to zero cause to return immediately.
+ * @return
+ *   - On success, returns the number of available event.
+ *   - On failure, a negative value.
+ */
+int
+rte_epoll_wait(int epfd, struct rte_epoll_event *events,
+	       int maxevents, int timeout);
+
+/**
+ * It performs control operations on epoll instance referred by the epfd.
+ * It requests that the operation op be performed for the target fd.
+ *
+ * @param epfd
+ *   Epoll instance fd on which the caller perform control operations.
+ * @param op
+ *   The operation be performed for the target fd.
+ * @param fd
+ *   The target fd on which the control ops perform.
+ * @param event
+ *   Describes the object linked to the fd.
+ *   Note: The caller must take care the object deletion after CTL_DEL.
+ * @return
+ *   - On success, zero.
+ *   - On failure, a negative value.
+ */
+int
+rte_epoll_ctl(int epfd, int op, int fd,
+	      struct rte_epoll_event *event);
+
+/**
+ * The function returns the per thread epoll instance.
+ *
+ * @return
+ *   epfd the epoll instance referred to.
+ */
+int
+rte_intr_tls_epfd(void);
+
 /**
  * @param intr_handle
  *   Pointer to the interrupt handle.
@@ -81,9 +174,18 @@ rte_intr_rx_ctl(struct rte_intr_handle *intr_handle,
 		int epfd, int op, unsigned int vec, void *data);
 
 /**
- * It enables the fastpath event fds if it's necessary.
- * It creates event fds when multi-vectors allowed,
- * otherwise it multiplexes the single event fds.
+ * It deletes registered eventfds.
+ *
+ * @param intr_handle
+ *   Pointer to the interrupt handle.
+ */
+void
+rte_intr_free_epoll_fd(struct rte_intr_handle *intr_handle);
+
+/**
+ * It enables the packet I/O interrupt event if it's necessary.
+ * It creates event fd for each interrupt vector when MSIX is used,
+ * otherwise it multiplexes a single event fd.
  *
  * @param intr_handle
  *   Pointer to the interrupt handle.
@@ -98,7 +200,7 @@ int
 rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd);
 
 /**
- * It disable the fastpath event fds.
+ * It disables the packet I/O interrupt event.
  * It deletes registered eventfds and closes the open fds.
  *
  * @param intr_handle
@@ -108,21 +210,23 @@ void
 rte_intr_efd_disable(struct rte_intr_handle *intr_handle);
 
 /**
- * The fastpath interrupt is enabled or not.
+ * The packet I/O interrupt on datapath is enabled or not.
  *
  * @param intr_handle
  *   Pointer to the interrupt handle.
  */
-int rte_intr_dp_is_en(struct rte_intr_handle *intr_handle);
+int
+rte_intr_dp_is_en(struct rte_intr_handle *intr_handle);
 
 /**
- * The interrupt handle instance allows other cause or not.
- * Other cause stands for none fastpath interrupt.
+ * The interrupt handle instance allows other causes or not.
+ * Other causes stand for any none packet I/O interrupts.
  *
  * @param intr_handle
  *   Pointer to the interrupt handle.
  */
-int rte_intr_allow_others(struct rte_intr_handle *intr_handle);
+int
+rte_intr_allow_others(struct rte_intr_handle *intr_handle);
 
 /**
  * The multiple interrupt vector capability of interrupt handle instance.
@@ -134,4 +238,4 @@ int rte_intr_allow_others(struct rte_intr_handle *intr_handle);
 int
 rte_intr_cap_multiple(struct rte_intr_handle *intr_handle);
 
-#endif /* _RTE_BSDAPP_INTERRUPTS_H_ */
+#endif /* _RTE_EAL_INTERRUPTS_H_ */
