diff --git a/drivers/bus/pci/bsd/pci.c b/drivers/bus/pci/bsd/pci.c
index 39d65c6..bc78f28 100644
--- a/drivers/bus/pci/bsd/pci.c
+++ b/drivers/bus/pci/bsd/pci.c
@@ -127,6 +127,29 @@ rte_pci_unmap_device(struct rte_pci_device *dev)
 	}
 }
 
+/* Map pci device */
+int
+rte_pci_remap_device(struct rte_pci_device *dev)
+{
+	int ret = -1;
+
+	if (dev == NULL)
+		return -EINVAL;
+
+	switch (dev->kdrv) {
+	case RTE_KDRV_NIC_UIO:
+		ret = pci_uio_remap_resource(dev);
+		break;
+	default:
+		RTE_LOG(DEBUG, EAL,
+			"  Not managed by a supported kernel driver, skipped\n");
+		ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
 void
 pci_uio_free_resource(struct rte_pci_device *dev,
 		struct mapped_pci_resource *uio_res)
diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c
index cdf8106..3f8a246 100644
--- a/drivers/bus/pci/linux/pci.c
+++ b/drivers/bus/pci/linux/pci.c
@@ -145,6 +145,38 @@ rte_pci_unmap_device(struct rte_pci_device *dev)
 	}
 }
 
+/* Map pci device */
+int
+rte_pci_remap_device(struct rte_pci_device *dev)
+{
+	int ret = -1;
+
+	if (dev == NULL)
+		return -EINVAL;
+
+	switch (dev->kdrv) {
+	case RTE_KDRV_VFIO:
+#ifdef VFIO_PRESENT
+		/* no thing to do */
+#endif
+		break;
+	case RTE_KDRV_IGB_UIO:
+	case RTE_KDRV_UIO_GENERIC:
+		if (rte_eal_using_phys_addrs()) {
+			/* map resources for devices that use uio */
+			ret = pci_uio_remap_resource(dev);
+		}
+		break;
+	default:
+		RTE_LOG(DEBUG, EAL,
+			"  Not managed by a supported kernel driver, skipped\n");
+		ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
 void *
 pci_find_max_end_va(void)
 {
@@ -386,6 +418,8 @@ pci_scan_one(const char *dirname, const struct rte_pci_addr *addr)
 		rte_pci_add_device(dev);
 	}
 
+	dev->device.state = DEVICE_PARSED;
+	TAILQ_INIT(&(dev->device.uev_cbs));
 	return 0;
 }
 
diff --git a/drivers/bus/pci/linux/pci_init.h b/drivers/bus/pci/linux/pci_init.h
index 99d7a2e..fa71f3c 100644
--- a/drivers/bus/pci/linux/pci_init.h
+++ b/drivers/bus/pci/linux/pci_init.h
@@ -58,6 +58,7 @@ int pci_uio_alloc_resource(struct rte_pci_device *dev,
 		struct mapped_pci_resource **uio_res);
 void pci_uio_free_resource(struct rte_pci_device *dev,
 		struct mapped_pci_resource *uio_res);
+int pci_uio_remap_resource(struct rte_pci_device *dev);
 int pci_uio_map_resource_by_index(struct rte_pci_device *dev, int res_idx,
 		struct mapped_pci_resource *uio_res, int map_idx);
 
diff --git a/drivers/bus/pci/pci_common.c b/drivers/bus/pci/pci_common.c
index 3e27779..170582d 100644
--- a/drivers/bus/pci/pci_common.c
+++ b/drivers/bus/pci/pci_common.c
@@ -283,6 +283,7 @@ pci_probe_all_drivers(struct rte_pci_device *dev)
 		if (rc > 0)
 			/* positive value means driver doesn't support it */
 			continue;
+		dev->device.state = DEVICE_PROBED;
 		return 0;
 	}
 	return 1;
@@ -482,6 +483,7 @@ rte_pci_insert_device(struct rte_pci_device *exist_pci_dev,
 void
 rte_pci_remove_device(struct rte_pci_device *pci_dev)
 {
+	RTE_LOG(DEBUG, EAL, " rte_pci_remove_device for device list\n");
 	TAILQ_REMOVE(&rte_pci_bus.device_list, pci_dev, next);
 }
 
@@ -503,6 +505,44 @@ pci_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 	return NULL;
 }
 
+static struct rte_device *
+pci_find_device_by_name(const struct rte_device *start,
+		rte_dev_cmp_name_t cmp_name,
+		const void *data)
+{
+	struct rte_pci_device *dev;
+
+	FOREACH_DEVICE_ON_PCIBUS(dev) {
+		if (start && &dev->device == start) {
+			start = NULL; /* starting point found */
+			continue;
+		}
+		if (cmp_name(dev->device.name, data) == 0)
+			return &dev->device;
+	}
+
+	return NULL;
+}
+
+static int
+pci_remap_device(struct rte_device *dev)
+{
+	struct rte_pci_device *pdev;
+	int ret;
+
+	if (dev == NULL)
+		return -EINVAL;
+
+	pdev = RTE_DEV_TO_PCI(dev);
+
+	/* remap resources for devices that use igb_uio */
+	ret = rte_pci_remap_device(pdev);
+	if (ret != 0)
+		RTE_LOG(ERR, EAL, "failed to remap device %s",
+			dev->name);
+	return ret;
+}
+
 static int
 pci_plug(struct rte_device *dev)
 {
@@ -529,10 +569,12 @@ struct rte_pci_bus rte_pci_bus = {
 		.scan = rte_pci_scan,
 		.probe = rte_pci_probe,
 		.find_device = pci_find_device,
+		.find_device_by_name = pci_find_device_by_name,
 		.plug = pci_plug,
 		.unplug = pci_unplug,
 		.parse = pci_parse,
 		.get_iommu_class = rte_pci_get_iommu_class,
+		.remap_device = pci_remap_device,
 	},
 	.device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
 	.driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),
diff --git a/drivers/bus/pci/pci_common_uio.c b/drivers/bus/pci/pci_common_uio.c
index b58bcf5..bb91fbd 100644
--- a/drivers/bus/pci/pci_common_uio.c
+++ b/drivers/bus/pci/pci_common_uio.c
@@ -176,6 +176,34 @@ pci_uio_unmap(struct mapped_pci_resource *uio_res)
 	}
 }
 
+/* remap the PCI resource of a PCI device in private virtual memory */
+int
+pci_uio_remap_resource(struct rte_pci_device *dev)
+{
+	int i;
+	uint64_t phaddr;
+	void *map_address;
+
+	/* Map all BARs */
+	for (i = 0; i != PCI_MAX_RESOURCE; i++) {
+		/* skip empty BAR */
+		phaddr = dev->mem_resource[i].phys_addr;
+		if (phaddr == 0)
+			continue;
+		map_address = pci_map_private_resource(
+				dev->mem_resource[i].addr, 0,
+				(size_t)dev->mem_resource[i].len);
+		if (map_address == MAP_FAILED)
+			goto error;
+		memset(map_address, 0xFF, (size_t)dev->mem_resource[i].len);
+		dev->mem_resource[i].addr = map_address;
+	}
+
+	return 0;
+error:
+	return -1;
+}
+
 static struct mapped_pci_resource *
 pci_uio_find_resource(struct rte_pci_device *dev)
 {
diff --git a/drivers/bus/pci/private.h b/drivers/bus/pci/private.h
index 2283f09..10baa1a 100644
--- a/drivers/bus/pci/private.h
+++ b/drivers/bus/pci/private.h
@@ -202,6 +202,18 @@ void pci_uio_free_resource(struct rte_pci_device *dev,
 		struct mapped_pci_resource *uio_res);
 
 /**
+ * remap the pci uio resource..
+ *
+ * @param dev
+ *   Point to the struct rte pci device.
+ * @return
+ *   - On success, zero.
+ *   - On failure, a negative value.
+ */
+int
+pci_uio_remap_resource(struct rte_pci_device *dev);
+
+/**
  * Map device memory to uio resource
  *
  * This function is private to EAL.
diff --git a/drivers/bus/pci/rte_bus_pci.h b/drivers/bus/pci/rte_bus_pci.h
index c0b619f..56ec7a1 100644
--- a/drivers/bus/pci/rte_bus_pci.h
+++ b/drivers/bus/pci/rte_bus_pci.h
@@ -197,6 +197,15 @@ int rte_pci_map_device(struct rte_pci_device *dev);
 void rte_pci_unmap_device(struct rte_pci_device *dev);
 
 /**
+ * Remap this device
+ *
+ * @param dev
+ *   A pointer to a rte_pci_device structure describing the device
+ *   to use
+ */
+int rte_pci_remap_device(struct rte_pci_device *dev);
+
+/**
  * Dump the content of the PCI bus.
  *
  * @param f
diff --git a/lib/librte_eal/bsdapp/eal/eal_dev.c b/lib/librte_eal/bsdapp/eal/eal_dev.c
new file mode 100644
index 0000000..6ea9a74
--- /dev/null
+++ b/lib/librte_eal/bsdapp/eal/eal_dev.c
@@ -0,0 +1,64 @@
+/*-
+ *   Copyright(c) 2010-2017 Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <sys/queue.h>
+#include <sys/signalfd.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <linux/netlink.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdbool.h>
+
+#include <rte_malloc.h>
+#include <rte_bus.h>
+#include <rte_dev.h>
+#include <rte_devargs.h>
+#include <rte_debug.h>
+#include <rte_log.h>
+
+#include "eal_thread.h"
+
+int
+rte_dev_monitor_start(void)
+{
+	return -1;
+}
+
+int
+rte_dev_monitor_stop(void)
+{
+	return -1;
+}
diff --git a/lib/librte_eal/bsdapp/eal/include/exec-env/rte_dev.h b/lib/librte_eal/bsdapp/eal/include/exec-env/rte_dev.h
new file mode 100644
index 0000000..7d2c3c3
--- /dev/null
+++ b/lib/librte_eal/bsdapp/eal/include/exec-env/rte_dev.h
@@ -0,0 +1,105 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_DEV_H_
+#error "don't include this file directly, please include generic <rte_dev.h>"
+#endif
+
+#ifndef _RTE_LINUXAPP_DEV_H_
+#define _RTE_LINUXAPP_DEV_H_
+
+#include <stdio.h>
+
+#include <rte_dev.h>
+
+#define RTE_EAL_UEVENT_MSG_LEN 4096
+
+enum uev_subsystem {
+	UEV_SUBSYSTEM_UIO,
+	UEV_SUBSYSTEM_VFIO,
+	UEV_SUBSYSTEM_PCI,
+	UEV_SUBSYSTEM_MAX
+};
+
+enum uev_monitor_netlink_group {
+	UEV_MONITOR_KERNEL,
+	UEV_MONITOR_UDEV,
+};
+
+/**
+ * The device event type.
+ */
+enum rte_eal_dev_event_type {
+	RTE_EAL_DEV_EVENT_UNKNOWN,	/**< unknown event type */
+	RTE_EAL_DEV_EVENT_ADD,		/**< device adding event */
+	RTE_EAL_DEV_EVENT_REMOVE,
+					/**< device removing event */
+	RTE_EAL_DEV_EVENT_CHANGE,
+					/**< device status change event */
+	RTE_EAL_DEV_EVENT_MOVE,		/**< device sys path move event */
+	RTE_EAL_DEV_EVENT_ONLINE,	/**< device online event */
+	RTE_EAL_DEV_EVENT_OFFLINE,	/**< device offline event */
+	RTE_EAL_DEV_EVENT_MAX		/**< max value of this enum */
+};
+
+struct rte_eal_uevent {
+	enum rte_eal_dev_event_type type;	/**< device event type */
+	int subsystem;				/**< subsystem id */
+	char *devname;				/**< device name */
+	enum uev_monitor_netlink_group group;	/**< device netlink group */
+};
+
+/**
+ * Start the device uevent monitoring.
+ *
+ * @param none
+ * @return
+ *   - On success, zero.
+ *   - On failure, a negative value.
+ */
+int
+rte_dev_monitor_start(void);
+
+/**
+ * Stop the device uevent monitoring .
+ *
+ * @param none
+ * @return
+ *   - On success, zero.
+ *   - On failure, a negative value.
+ */
+
+int
+rte_dev_monitor_stop(void);
+
+#endif /* _RTE_LINUXAPP_DEV_H_ */
diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index 3e022d5..bdb0e54 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -51,8 +51,10 @@ rte_bus_register(struct rte_bus *bus)
 	RTE_VERIFY(bus->scan);
 	RTE_VERIFY(bus->probe);
 	RTE_VERIFY(bus->find_device);
+	RTE_VERIFY(bus->find_device_by_name);
 	/* Buses supporting driver plug also require unplug. */
 	RTE_VERIFY(!bus->plug || bus->unplug);
+	RTE_VERIFY(bus->remap_device);
 
 	TAILQ_INSERT_TAIL(&rte_bus_list, bus, next);
 	RTE_LOG(DEBUG, EAL, "Registered [%s] bus.\n", bus->name);
@@ -170,6 +172,14 @@ cmp_rte_device(const struct rte_device *dev1, const void *_dev2)
 }
 
 static int
+cmp_rte_device_name(const char *dev_name1, const void *_dev_name2)
+{
+	const char *dev_name2 = _dev_name2;
+
+	return strcmp(dev_name1, dev_name2);
+}
+
+static int
 bus_find_device(const struct rte_bus *bus, const void *_dev)
 {
 	struct rte_device *dev;
@@ -178,6 +188,25 @@ bus_find_device(const struct rte_bus *bus, const void *_dev)
 	return dev == NULL;
 }
 
+static struct rte_device *
+bus_find_device_by_name(const struct rte_bus *bus, const void *_dev_name)
+{
+	struct rte_device *dev;
+
+	dev = bus->find_device_by_name(NULL, cmp_rte_device_name, _dev_name);
+	return dev;
+}
+
+struct rte_device *
+
+rte_bus_find_device(const struct rte_bus *bus, const void *_dev_name)
+{
+	struct rte_device *dev;
+
+	dev = bus_find_device_by_name(bus, _dev_name);
+	return dev;
+}
+
 struct rte_bus *
 rte_bus_find_by_device(const struct rte_device *dev)
 {
diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index e251275..ab0794b 100644
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -36,15 +36,39 @@
 #include <string.h>
 #include <inttypes.h>
 #include <sys/queue.h>
+#include <unistd.h>
+#include <fcntl.h>
 
 #include <rte_bus.h>
 #include <rte_dev.h>
 #include <rte_devargs.h>
 #include <rte_debug.h>
 #include <rte_log.h>
+#include <rte_spinlock.h>
+#include <rte_malloc.h>
 
 #include "eal_private.h"
 
+/* spinlock for device callbacks */
+static rte_spinlock_t rte_dev_cb_lock = RTE_SPINLOCK_INITIALIZER;
+
+/**
+ * The user application callback description.
+ *
+ * It contains callback address to be registered by user application,
+ * the pointer to the parameters for callback, and the event type.
+ */
+struct rte_eal_dev_callback {
+	TAILQ_ENTRY(rte_eal_dev_callback) next; /**< Callbacks list */
+	rte_eal_dev_cb_fn cb_fn;                /**< Callback address */
+	void *cb_arg;                           /**< Parameter for callback */
+	void *ret_param;                        /**< Return parameter */
+	enum rte_eal_dev_event_type event;      /**< device event type */
+	uint32_t active;                        /**< Callback is executing */
+};
+
+static struct rte_eal_dev_callback *dev_add_cb;
+
 static int cmp_detached_dev_name(const struct rte_device *dev,
 	const void *_name)
 {
@@ -244,3 +268,201 @@ int rte_eal_hotplug_remove(const char *busname, const char *devname)
 	rte_eal_devargs_remove(busname, devname);
 	return ret;
 }
+
+int
+rte_eal_dev_monitor_enable(void)
+{
+	int ret;
+
+	ret = rte_dev_monitor_start();
+	if (ret)
+		RTE_LOG(ERR, EAL, "Can not init device monitor\n");
+	return ret;
+}
+
+int
+rte_dev_callback_register(struct rte_device *device,
+			enum rte_eal_dev_event_type event,
+			rte_eal_dev_cb_fn cb_fn, void *cb_arg)
+{
+	struct rte_eal_dev_callback *user_cb;
+
+	if (!cb_fn)
+		return -EINVAL;
+
+	rte_spinlock_lock(&rte_dev_cb_lock);
+
+	if (TAILQ_EMPTY(&(device->uev_cbs)))
+		TAILQ_INIT(&(device->uev_cbs));
+
+	if (event == RTE_EAL_DEV_EVENT_ADD) {
+		user_cb = NULL;
+	} else {
+		TAILQ_FOREACH(user_cb, &(device->uev_cbs), next) {
+			if (user_cb->cb_fn == cb_fn &&
+				user_cb->cb_arg == cb_arg &&
+				user_cb->event == event) {
+				break;
+			}
+		}
+	}
+
+	/* create a new callback. */
+	if (user_cb == NULL) {
+		/* allocate a new interrupt callback entity */
+		user_cb = rte_zmalloc("eal device event",
+					sizeof(*user_cb), 0);
+		if (user_cb == NULL) {
+			RTE_LOG(ERR, EAL, "Can not allocate memory\n");
+			return -ENOMEM;
+		}
+		user_cb->cb_fn = cb_fn;
+		user_cb->cb_arg = cb_arg;
+		user_cb->event = event;
+		if (event == RTE_EAL_DEV_EVENT_ADD)
+			dev_add_cb = user_cb;
+		else
+			TAILQ_INSERT_TAIL(&(device->uev_cbs), user_cb, next);
+	}
+
+	rte_spinlock_unlock(&rte_dev_cb_lock);
+	return 0;
+}
+
+int
+rte_dev_callback_unregister(struct rte_device *device,
+			enum rte_eal_dev_event_type event,
+			rte_eal_dev_cb_fn cb_fn, void *cb_arg)
+{
+	int ret;
+	struct rte_eal_dev_callback *cb, *next;
+
+	if (!cb_fn)
+		return -EINVAL;
+
+	rte_spinlock_lock(&rte_dev_cb_lock);
+
+	ret = 0;
+	if (event == RTE_EAL_DEV_EVENT_ADD) {
+		rte_free(dev_add_cb);
+		dev_add_cb = NULL;
+	} else {
+		for (cb = TAILQ_FIRST(&(device->uev_cbs)); cb != NULL;
+		      cb = next) {
+
+			next = TAILQ_NEXT(cb, next);
+
+			if (cb->cb_fn != cb_fn || cb->event != event ||
+					(cb->cb_arg != (void *)-1 &&
+					cb->cb_arg != cb_arg))
+				continue;
+
+			/*
+			 * if this callback is not executing right now,
+			 * then remove it.
+			 */
+			if (cb->active == 0) {
+				TAILQ_REMOVE(&(device->uev_cbs), cb, next);
+				rte_free(cb);
+			} else {
+				ret = -EAGAIN;
+			}
+		}
+	}
+	rte_spinlock_unlock(&rte_dev_cb_lock);
+	return ret;
+}
+
+int
+_rte_dev_callback_process(struct rte_device *device,
+			enum rte_eal_dev_event_type event,
+			void *cb_arg, void *ret_param)
+{
+	struct rte_eal_dev_callback dev_cb;
+	struct rte_eal_dev_callback *cb_lst;
+	int rc = 0;
+
+	rte_spinlock_lock(&rte_dev_cb_lock);
+	if (event == RTE_EAL_DEV_EVENT_ADD) {
+		if (cb_arg != NULL)
+			dev_add_cb->cb_arg = cb_arg;
+
+		if (ret_param != NULL)
+			dev_add_cb->ret_param = ret_param;
+
+		rte_spinlock_unlock(&rte_dev_cb_lock);
+		rc = dev_add_cb->cb_fn(dev_add_cb->event,
+				dev_add_cb->cb_arg, dev_add_cb->ret_param);
+		rte_spinlock_lock(&rte_dev_cb_lock);
+	} else {
+		TAILQ_FOREACH(cb_lst, &(device->uev_cbs), next) {
+			if (cb_lst->cb_fn == NULL || cb_lst->event != event)
+				continue;
+			dev_cb = *cb_lst;
+			cb_lst->active = 1;
+			if (cb_arg != NULL)
+				dev_cb.cb_arg = cb_arg;
+			if (ret_param != NULL)
+				dev_cb.ret_param = ret_param;
+
+			rte_spinlock_unlock(&rte_dev_cb_lock);
+			rc = dev_cb.cb_fn(dev_cb.event,
+					dev_cb.cb_arg, dev_cb.ret_param);
+			rte_spinlock_lock(&rte_dev_cb_lock);
+			cb_lst->active = 0;
+		}
+	}
+	rte_spinlock_unlock(&rte_dev_cb_lock);
+	return rc;
+}
+
+int
+rte_dev_bind_driver(const char *dev_name, const char *drv_type) {
+	char drv_bind_path[1024];
+	char drv_override_path[1024]; /* contains the /dev/uioX */
+	int drv_override_fd;
+	int drv_bind_fd;
+
+	RTE_SET_USED(drv_type);
+
+	snprintf(drv_override_path, sizeof(drv_override_path),
+		"/sys/bus/pci/devices/%s/driver_override", dev_name);
+
+	/* specify the driver for a device by writing to driver_override */
+	drv_override_fd = open(drv_override_path, O_WRONLY);
+	if (drv_override_fd < 0) {
+		RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+			drv_override_path, strerror(errno));
+		goto err;
+	}
+
+	if (write(drv_override_fd, drv_type, sizeof(drv_type)) < 0) {
+		RTE_LOG(ERR, EAL,
+			"Error: bind failed - Cannot write "
+			"driver %s to device %s\n", drv_type, dev_name);
+		goto err;
+	}
+
+	close(drv_override_fd);
+
+	snprintf(drv_bind_path, sizeof(drv_bind_path),
+		"/sys/bus/pci/drivers/%s/bind", drv_type);
+
+	/* do the bind by writing device to the specific driver  */
+	drv_bind_fd = open(drv_bind_path, O_WRONLY | O_APPEND);
+	if (drv_bind_fd < 0) {
+		RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+			drv_bind_path, strerror(errno));
+		goto err;
+	}
+
+	if (write(drv_bind_fd, dev_name, sizeof(dev_name)) < 0)
+		goto err;
+
+	close(drv_bind_fd);
+	return 0;
+err:
+	close(drv_override_fd);
+	close(drv_bind_fd);
+	return -1;
+}
diff --git a/lib/librte_eal/common/eal_common_vdev.c b/lib/librte_eal/common/eal_common_vdev.c
index f7e547a..2ad517c 100644
--- a/lib/librte_eal/common/eal_common_vdev.c
+++ b/lib/librte_eal/common/eal_common_vdev.c
@@ -318,6 +318,31 @@ vdev_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 	return NULL;
 }
 
+static struct rte_device *
+vdev_find_device_by_name(const struct rte_device *start,
+		rte_dev_cmp_name_t cmp_name,
+		const void *data)
+{
+	struct rte_vdev_device *dev;
+
+	TAILQ_FOREACH(dev, &vdev_device_list, next) {
+		if (start && &dev->device == start) {
+			start = NULL;
+			continue;
+		}
+		if (cmp_name(dev->device.name, data) == 0)
+			return &dev->device;
+	}
+	return NULL;
+}
+
+static int
+vdev_remap_device(struct rte_device *dev)
+{
+	RTE_SET_USED(dev);
+	return 0;
+}
+
 static int
 vdev_plug(struct rte_device *dev)
 {
@@ -334,9 +359,11 @@ static struct rte_bus rte_vdev_bus = {
 	.scan = vdev_scan,
 	.probe = vdev_probe,
 	.find_device = vdev_find_device,
+	.find_device_by_name = vdev_find_device_by_name,
 	.plug = vdev_plug,
 	.unplug = vdev_unplug,
 	.parse = vdev_parse,
+	.remap_device = vdev_remap_device,
 };
 
 RTE_REGISTER_BUS(vdev, rte_vdev_bus);
diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index 6fb0834..f1ca670 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -122,6 +122,34 @@ typedef struct rte_device *
 			 const void *data);
 
 /**
+ * Device iterator to find a device on a bus.
+ *
+ * This function returns an rte_device if one of those held by the bus
+ * matches the data passed as parameter.
+ *
+ * If the comparison function returns zero this function should stop iterating
+ * over any more devices. To continue a search the device of a previous search
+ * can be passed via the start parameter.
+ *
+ * @param cmp
+ *	the device name comparison function.
+ *
+ * @param data
+ *	Data to compare each device against.
+ *
+ * @param start
+ *	starting point for the iteration
+ *
+ * @return
+ *	The first device matching the data, NULL if none exists.
+ */
+typedef struct rte_device *
+(*rte_bus_find_device_by_name_t)(const struct rte_device *start,
+			 rte_dev_cmp_name_t cmp,
+			 const void *data);
+
+
+/**
  * Implementation specific probe function which is responsible for linking
  * devices on that bus with applicable drivers.
  *
@@ -168,6 +196,20 @@ typedef int (*rte_bus_unplug_t)(struct rte_device *dev);
 typedef int (*rte_bus_parse_t)(const char *name, void *addr);
 
 /**
+ * Implementation specific remap function which is responsible for remmaping
+ * devices on that bus from original share memory resource to a private memory
+ * resource for the sake of device has been removal.
+ *
+ * @param dev
+ *	Device pointer that was returned by a previous call to find_device.
+ *
+ * @return
+ *	0 on success.
+ *	!0 on error.
+ */
+typedef int (*rte_bus_remap_device_t)(struct rte_device *dev);
+
+/**
  * Bus scan policies
  */
 enum rte_bus_scan_mode {
@@ -206,9 +248,12 @@ struct rte_bus {
 	rte_bus_scan_t scan;         /**< Scan for devices attached to bus */
 	rte_bus_probe_t probe;       /**< Probe devices on bus */
 	rte_bus_find_device_t find_device; /**< Find a device on the bus */
+	rte_bus_find_device_by_name_t find_device_by_name;
+				     /**< Find a device on the bus */
 	rte_bus_plug_t plug;         /**< Probe single device for drivers */
 	rte_bus_unplug_t unplug;     /**< Remove single device from driver */
 	rte_bus_parse_t parse;       /**< Parse a device name */
+	rte_bus_remap_device_t remap_device;       /**< remap a device */
 	struct rte_bus_conf conf;    /**< Bus configuration */
 	rte_bus_get_iommu_class_t get_iommu_class; /**< Get iommu class */
 };
@@ -306,6 +351,12 @@ struct rte_bus *rte_bus_find(const struct rte_bus *start, rte_bus_cmp_t cmp,
 struct rte_bus *rte_bus_find_by_device(const struct rte_device *dev);
 
 /**
+ * Find the registered bus for a particular device.
+ */
+struct rte_device *rte_bus_find_device(const struct rte_bus *bus,
+				const void *dev_name);
+
+/**
  * Find the registered bus for a given name.
  */
 struct rte_bus *rte_bus_find_by_name(const char *busname);
diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h
index 4c4ac7e..7307679 100644
--- a/lib/librte_eal/common/include/rte_dev.h
+++ b/lib/librte_eal/common/include/rte_dev.h
@@ -52,6 +52,15 @@ extern "C" {
 #include <rte_config.h>
 #include <rte_log.h>
 
+#include <exec-env/rte_dev.h>
+
+typedef int (*rte_eal_dev_cb_fn)(enum rte_eal_dev_event_type event,
+					void *cb_arg, void *ret_param);
+
+struct rte_eal_dev_callback;
+/** @internal Structure to keep track of registered callbacks */
+TAILQ_HEAD(rte_eal_dev_cb_list, rte_eal_dev_callback);
+
 __attribute__((format(printf, 2, 0)))
 static inline void
 rte_pmd_debug_trace(const char *func_name, const char *fmt, ...)
@@ -158,6 +167,13 @@ struct rte_driver {
  */
 #define RTE_DEV_NAME_MAX_LEN 64
 
+enum device_state {
+	DEVICE_UNDEFINED,
+	DEVICE_FAULT,
+	DEVICE_PARSED,
+	DEVICE_PROBED,
+};
+
 /**
  * A structure describing a generic device.
  */
@@ -167,6 +183,9 @@ struct rte_device {
 	const struct rte_driver *driver;/**< Associated driver */
 	int numa_node;                /**< NUMA node connection */
 	struct rte_devargs *devargs;  /**< Device user arguments */
+	enum device_state state;  /**< Device state */
+	/** User application callbacks for device event */
+	struct rte_eal_dev_cb_list uev_cbs;
 };
 
 /**
@@ -271,6 +290,8 @@ int rte_eal_hotplug_remove(const char *busname, const char *devname);
  */
 typedef int (*rte_dev_cmp_t)(const struct rte_device *dev, const void *data);
 
+typedef int (*rte_dev_cmp_name_t)(const char *dev_name, const void *data);
+
 #define RTE_PMD_EXPORT_NAME_ARRAY(n, idx) n##idx[]
 
 #define RTE_PMD_EXPORT_NAME(name, idx) \
@@ -316,4 +337,88 @@ __attribute__((used)) = str
 }
 #endif
 
-#endif /* _RTE_VDEV_H_ */
+/**
+ * It enable the device event monitoring for a specific event.
+ *
+ * @param none
+ * @return
+ *   - On success, zero.
+ *   - On failure, a negative value.
+ */
+int
+rte_eal_dev_monitor_enable(void);
+/**
+ * It registers the callback for the specific event. Multiple
+ * callbacks cal be registered at the same time.
+ * @param event
+ *  The device event type.
+ * @param cb_fn
+ *  callback address.
+ * @param cb_arg
+ *  address of parameter for callback.
+ *
+ * @return
+ *  - On success, zero.
+ *  - On failure, a negative value.
+ */
+int rte_dev_callback_register(struct rte_device *device,
+			enum rte_eal_dev_event_type event,
+			rte_eal_dev_cb_fn cb_fn, void *cb_arg);
+
+/**
+ * It unregisters the callback according to the specified event.
+ *
+ * @param event
+ *  The event type which corresponding to the callback.
+ * @param cb_fn
+ *  callback address.
+ *  address of parameter for callback, (void *)-1 means to remove all
+ *  registered which has the same callback address.
+ *
+ * @return
+ *  - On success, return the number of callback entities removed.
+ *  - On failure, a negative value.
+ */
+int rte_dev_callback_unregister(struct rte_device *device,
+			enum rte_eal_dev_event_type event,
+			rte_eal_dev_cb_fn cb_fn, void *cb_arg);
+
+/**
+ * @internal Executes all the user application registered callbacks for
+ * the specific device. It is for DPDK internal user only. User
+ * application should not call it directly.
+ *
+ * @param event
+ *  The device event type.
+ * @param cb_arg
+ *  callback parameter.
+ * @param ret_param
+ *  To pass data back to user application.
+ *  This allows the user application to decide if a particular function
+ *  is permitted or not.
+ *
+ * @return
+ *  - On success, return zero.
+ *  - On failure, a negative value.
+ */
+int
+_rte_dev_callback_process(struct rte_device *device,
+			enum rte_eal_dev_event_type event,
+			void *cb_arg, void *ret_param);
+
+/**
+ * It can be used to bind a device to a specific type of driver.
+ *
+ * @param dev_name
+ *  The device name.
+ * @param drv_type
+ *  The specific driver's type.
+ *
+ * @return
+ *  - On success, zero.
+ *  - On failure, a negative value.
+ */
+int
+rte_dev_bind_driver(const char *dev_name, const char *drv_type);
+
+#endif /* _RTE_DEV_H_ */
diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile
index 1d3a42d..e57da21 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -67,6 +67,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_lcore.c
 SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_timer.c
 SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_interrupts.c
 SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_alarm.c
+SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_dev.c
 
 # from common dir
 SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += eal_common_lcore.c
@@ -139,7 +140,7 @@ ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
 CFLAGS_eal_thread.o += -Wno-return-type
 endif
 
-INC := rte_kni_common.h
+INC := rte_kni_common.h rte_dev.h
 
 SYMLINK-$(CONFIG_RTE_EXEC_ENV_LINUXAPP)-include/exec-env := \
 	$(addprefix include/exec-env/,$(INC))
diff --git a/lib/librte_eal/linuxapp/eal/eal_dev.c b/lib/librte_eal/linuxapp/eal/eal_dev.c
new file mode 100644
index 0000000..7410643
--- /dev/null
+++ b/lib/librte_eal/linuxapp/eal/eal_dev.c
@@ -0,0 +1,353 @@
+/*-
+ *   Copyright(c) 2010-2017 Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <sys/queue.h>
+#include <sys/signalfd.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <linux/netlink.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdbool.h>
+
+#include <rte_malloc.h>
+#include <rte_bus.h>
+#include <rte_dev.h>
+#include <rte_devargs.h>
+#include <rte_debug.h>
+#include <rte_log.h>
+
+#include "eal_thread.h"
+
+/* uev monitoring thread */
+static pthread_t uev_monitor_thread;
+
+bool udev_exit = true;
+
+bool no_request_thread = true;
+
+static void sig_handler(int signum)
+{
+	if (signum == SIGINT || signum == SIGTERM)
+		rte_dev_monitor_stop();
+}
+
+static int
+dev_monitor_fd_new(void)
+{
+
+	int uevent_fd;
+
+	uevent_fd = socket(PF_NETLINK, SOCK_RAW | SOCK_CLOEXEC |
+			SOCK_NONBLOCK,
+			NETLINK_KOBJECT_UEVENT);
+	if (uevent_fd < 0) {
+		RTE_LOG(ERR, EAL, "create uevent fd failed\n");
+		return -1;
+	}
+	return uevent_fd;
+}
+
+static int
+dev_monitor_enable(int netlink_fd)
+{
+	struct sockaddr_nl addr;
+	int ret;
+	int size = 64 * 1024;
+	int nonblock = 1;
+
+	memset(&addr, 0, sizeof(addr));
+	addr.nl_family = AF_NETLINK;
+	addr.nl_pid = 0;
+	addr.nl_groups = 0xffffffff;
+
+	if (bind(netlink_fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		RTE_LOG(ERR, EAL, "bind failed\n");
+		goto err;
+	}
+
+	setsockopt(netlink_fd, SOL_SOCKET, SO_PASSCRED, &size, sizeof(size));
+
+	ret = ioctl(netlink_fd, FIONBIO, &nonblock);
+	if (ret != 0) {
+		RTE_LOG(ERR, EAL, "ioctl(FIONBIO) failed\n");
+		goto err;
+	}
+	return 0;
+err:
+	close(netlink_fd);
+	return -1;
+}
+
+static int
+dev_uev_parse(const char *buf, struct rte_eal_uevent *event)
+{
+	char action[RTE_EAL_UEVENT_MSG_LEN];
+	char subsystem[RTE_EAL_UEVENT_MSG_LEN];
+	char dev_path[RTE_EAL_UEVENT_MSG_LEN];
+	char pci_slot_name[RTE_EAL_UEVENT_MSG_LEN];
+	int i = 0;
+
+	memset(action, 0, RTE_EAL_UEVENT_MSG_LEN);
+	memset(subsystem, 0, RTE_EAL_UEVENT_MSG_LEN);
+	memset(dev_path, 0, RTE_EAL_UEVENT_MSG_LEN);
+	memset(pci_slot_name, 0, RTE_EAL_UEVENT_MSG_LEN);
+
+	while (i < RTE_EAL_UEVENT_MSG_LEN) {
+		for (; i < RTE_EAL_UEVENT_MSG_LEN; i++) {
+			if (*buf)
+				break;
+			buf++;
+		}
+		if (!strncmp(buf, "libudev", 7)) {
+			buf += 7;
+			i += 7;
+			event->group = UEV_MONITOR_UDEV;
+		}
+		if (!strncmp(buf, "ACTION=", 7)) {
+			buf += 7;
+			i += 7;
+			snprintf(action, sizeof(action), "%s", buf);
+		} else if (!strncmp(buf, "DEVPATH=", 8)) {
+			buf += 8;
+			i += 8;
+			snprintf(dev_path, sizeof(dev_path), "%s", buf);
+		} else if (!strncmp(buf, "SUBSYSTEM=", 10)) {
+			buf += 10;
+			i += 10;
+			snprintf(subsystem, sizeof(subsystem), "%s", buf);
+		} else if (!strncmp(buf, "PCI_SLOT_NAME=", 14)) {
+			buf += 14;
+			i += 14;
+			snprintf(pci_slot_name, sizeof(subsystem), "%s", buf);
+		}
+		for (; i < RTE_EAL_UEVENT_MSG_LEN; i++) {
+			if (*buf == '\0')
+				break;
+			buf++;
+		}
+	}
+
+	if (!strncmp(subsystem, "pci", 3))
+		event->subsystem = UEV_SUBSYSTEM_PCI;
+	if (!strncmp(action, "add", 3))
+		event->type = RTE_EAL_DEV_EVENT_ADD;
+	if (!strncmp(action, "remove", 6))
+		event->type = RTE_EAL_DEV_EVENT_REMOVE;
+	event->devname = pci_slot_name;
+
+	return 0;
+}
+
+static int
+dev_uev_receive(int fd, struct rte_eal_uevent *uevent)
+{
+	int ret;
+	char buf[RTE_EAL_UEVENT_MSG_LEN];
+
+	memset(uevent, 0, sizeof(struct rte_eal_uevent));
+	memset(buf, 0, RTE_EAL_UEVENT_MSG_LEN);
+
+	ret = recv(fd, buf, RTE_EAL_UEVENT_MSG_LEN - 1, MSG_DONTWAIT);
+	if (ret < 0) {
+		RTE_LOG(ERR, EAL,
+		"Socket read error(%d): %s\n",
+		errno, strerror(errno));
+		return -1;
+	} else if (ret == 0)
+		/* connection closed */
+		return -1;
+
+	return dev_uev_parse(buf, uevent);
+}
+
+static int
+dev_uev_process(struct epoll_event *events, int nfds)
+{
+	struct rte_bus *bus;
+	struct rte_device *dev;
+	struct rte_eal_uevent uevent;
+	int ret;
+	int i;
+
+	for (i = 0; i < nfds; i++) {
+		/**
+		 * check device uevent from kernel side, no need to check
+		 * uevent from udev.
+		 */
+		if ((dev_uev_receive(events[i].data.fd, &uevent)) ||
+			(uevent.group == UEV_MONITOR_UDEV))
+			return 0;
+
+		/* default handle all pci devcie when is being hot plug */
+		if (uevent.subsystem == UEV_SUBSYSTEM_PCI) {
+			bus = rte_bus_find_by_name("pci");
+			dev = rte_bus_find_device(bus, uevent.devname);
+			if (uevent.type == RTE_EAL_DEV_EVENT_REMOVE) {
+				if ((!dev) || dev->state == DEVICE_UNDEFINED)
+					return 0;
+				dev->state = DEVICE_FAULT;
+				/**
+				 * remap the resource to be fake
+				 * before user's removal processing
+				 */
+				ret = bus->remap_device(dev);
+				if (!ret)
+					return(_rte_dev_callback_process(dev,
+					  RTE_EAL_DEV_EVENT_REMOVE,
+					  NULL, NULL));
+			} else if (uevent.type == RTE_EAL_DEV_EVENT_ADD) {
+				if (dev == NULL) {
+					/**
+					 * bind the driver to the device
+					 * before user's add processing
+					 */
+					rte_dev_bind_driver(
+						uevent.devname,
+						"igb_uio");
+					return(_rte_dev_callback_process(NULL,
+					  RTE_EAL_DEV_EVENT_ADD,
+					  uevent.devname, NULL));
+				}
+			}
+		}
+	}
+	return 0;
+}
+
+/**
+ * It builds/rebuilds up the epoll file descriptor with all the
+ * file descriptors being waited on. Then handles the interrupts.
+ *
+ * @param arg
+ *  pointer. (unused)
+ *
+ * @return
+ *  never return;
+ */
+static __attribute__((noreturn)) void *
+dev_uev_monitoring(__rte_unused void *arg)
+{
+	struct sigaction act;
+	sigset_t mask;
+	int netlink_fd;
+	struct epoll_event ep_kernel;
+	int fd_ep;
+
+	udev_exit = false;
+
+	/* set signal handlers */
+	memset(&act, 0x00, sizeof(struct sigaction));
+	act.sa_handler = sig_handler;
+	sigemptyset(&act.sa_mask);
+	act.sa_flags = SA_RESTART;
+	sigaction(SIGINT, &act, NULL);
+	sigaction(SIGTERM, &act, NULL);
+	sigemptyset(&mask);
+	sigaddset(&mask, SIGINT);
+	sigaddset(&mask, SIGTERM);
+	sigprocmask(SIG_UNBLOCK, &mask, NULL);
+
+	fd_ep = epoll_create1(EPOLL_CLOEXEC);
+	if (fd_ep < 0) {
+		RTE_LOG(ERR, EAL, "error creating epoll fd: %m\n");
+		goto out;
+	}
+
+	netlink_fd = dev_monitor_fd_new();
+
+	if (dev_monitor_enable(netlink_fd) < 0) {
+		RTE_LOG(ERR, EAL, "error subscribing to kernel events\n");
+		goto out;
+	}
+
+	memset(&ep_kernel, 0, sizeof(struct epoll_event));
+	ep_kernel.events = EPOLLIN | EPOLLPRI | EPOLLRDHUP | EPOLLHUP;
+	ep_kernel.data.fd = netlink_fd;
+	if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, netlink_fd,
+		&ep_kernel) < 0) {
+		RTE_LOG(ERR, EAL, "error addding fd to epoll: %m\n");
+		goto out;
+	}
+
+	while (!udev_exit) {
+		int fdcount;
+		struct epoll_event ev[1];
+
+		fdcount = epoll_wait(fd_ep, ev, 1, -1);
+		if (fdcount < 0) {
+			if (errno != EINTR)
+				RTE_LOG(ERR, EAL, "error receiving uevent "
+					"message: %m\n");
+				continue;
+			}
+
+		/* epoll_wait has at least one fd ready to read */
+		if (dev_uev_process(ev, fdcount) < 0) {
+			if (errno != EINTR)
+				RTE_LOG(ERR, EAL, "error processing uevent "
+					"message: %m\n");
+		}
+	}
+out:
+	if (fd_ep >= 0)
+		close(fd_ep);
+	if (netlink_fd >= 0)
+		close(netlink_fd);
+	rte_panic("uev monitoring fail\n");
+}
+
+int
+rte_dev_monitor_start(void)
+{
+	int ret;
+
+	if (!no_request_thread)
+		return 0;
+	no_request_thread = false;
+
+	/* create the host thread to wait/handle the uevent from kernel */
+	ret = pthread_create(&uev_monitor_thread, NULL,
+		dev_uev_monitoring, NULL);
+	return ret;
+}
+
+int
+rte_dev_monitor_stop(void)
+{
+	udev_exit = true;
+	no_request_thread = true;
+	return 0;
+}
diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_dev.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_dev.h
new file mode 100644
index 0000000..7d2c3c3
--- /dev/null
+++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_dev.h
@@ -0,0 +1,105 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_DEV_H_
+#error "don't include this file directly, please include generic <rte_dev.h>"
+#endif
+
+#ifndef _RTE_LINUXAPP_DEV_H_
+#define _RTE_LINUXAPP_DEV_H_
+
+#include <stdio.h>
+
+#include <rte_dev.h>
+
+#define RTE_EAL_UEVENT_MSG_LEN 4096
+
+enum uev_subsystem {
+	UEV_SUBSYSTEM_UIO,
+	UEV_SUBSYSTEM_VFIO,
+	UEV_SUBSYSTEM_PCI,
+	UEV_SUBSYSTEM_MAX
+};
+
+enum uev_monitor_netlink_group {
+	UEV_MONITOR_KERNEL,
+	UEV_MONITOR_UDEV,
+};
+
+/**
+ * The device event type.
+ */
+enum rte_eal_dev_event_type {
+	RTE_EAL_DEV_EVENT_UNKNOWN,	/**< unknown event type */
+	RTE_EAL_DEV_EVENT_ADD,		/**< device adding event */
+	RTE_EAL_DEV_EVENT_REMOVE,
+					/**< device removing event */
+	RTE_EAL_DEV_EVENT_CHANGE,
+					/**< device status change event */
+	RTE_EAL_DEV_EVENT_MOVE,		/**< device sys path move event */
+	RTE_EAL_DEV_EVENT_ONLINE,	/**< device online event */
+	RTE_EAL_DEV_EVENT_OFFLINE,	/**< device offline event */
+	RTE_EAL_DEV_EVENT_MAX		/**< max value of this enum */
+};
+
+struct rte_eal_uevent {
+	enum rte_eal_dev_event_type type;	/**< device event type */
+	int subsystem;				/**< subsystem id */
+	char *devname;				/**< device name */
+	enum uev_monitor_netlink_group group;	/**< device netlink group */
+};
+
+/**
+ * Start the device uevent monitoring.
+ *
+ * @param none
+ * @return
+ *   - On success, zero.
+ *   - On failure, a negative value.
+ */
+int
+rte_dev_monitor_start(void);
+
+/**
+ * Stop the device uevent monitoring .
+ *
+ * @param none
+ * @return
+ *   - On success, zero.
+ *   - On failure, a negative value.
+ */
+
+int
+rte_dev_monitor_stop(void);
+
+#endif /* _RTE_LINUXAPP_DEV_H_ */
diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index fd320d8..ba10a59 100644
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -354,6 +354,12 @@ igbuio_pci_release(struct uio_info *info, struct inode *inode)
 	struct rte_uio_pci_dev *udev = info->priv;
 	struct pci_dev *dev = udev->pdev;
 
+	/* check if device have been remove before release */
+	if ((&dev->dev.kobj)->state_remove_uevent_sent == 1) {
+		pr_info("The device have been removed\n");
+		return -1;
+	}
+
 	/* disable interrupts */
 	igbuio_pci_disable_interrupts(udev);
 
diff --git a/lib/librte_pci/rte_pci.c b/lib/librte_pci/rte_pci.c
index 1307a18..0d37ce8 100644
--- a/lib/librte_pci/rte_pci.c
+++ b/lib/librte_pci/rte_pci.c
@@ -180,6 +180,26 @@ pci_addr_parse(const char *str, struct rte_pci_addr *addr)
 	return -1;
 }
 
+/* map a private resource from an address*/
+void *
+pci_map_private_resource(void *requested_addr, off_t offset, size_t size)
+{
+	void *mapaddr;
+
+	mapaddr = mmap(requested_addr, size,
+			   PROT_READ | PROT_WRITE,
+			   MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
+	if (mapaddr == MAP_FAILED) {
+		RTE_LOG(ERR, EAL, "%s(): cannot mmap(%p, 0x%lx, 0x%lx): "
+			"%s (%p)\n",
+			__func__, requested_addr,
+			(unsigned long)size, (unsigned long)offset,
+			strerror(errno), mapaddr);
+	} else
+		RTE_LOG(DEBUG, EAL, "  PCI memory mapped at %p\n", mapaddr);
+
+	return mapaddr;
+}
 
 /* map a particular resource from a file */
 void *
diff --git a/lib/librte_pci/rte_pci.h b/lib/librte_pci/rte_pci.h
index ea0897c..c5392fe 100644
--- a/lib/librte_pci/rte_pci.h
+++ b/lib/librte_pci/rte_pci.h
@@ -243,6 +243,23 @@ int pci_addr_cmp(const struct rte_pci_addr *addr,
 int pci_addr_parse(const char *str, struct rte_pci_addr *addr);
 
 /**
+ * @internal
+ * Map to a particular private resource.
+ *
+ * @param requested_addr
+ *      The starting address for the new mapping range.
+ * @param offset
+ *      The offset for the mapping range.
+ * @param size
+ *      The size for the mapping range.
+ * @return
+ *   - On success, the function returns a pointer to the mapped area.
+ *   - On error, the value MAP_FAILED is returned.
+ */
+void *pci_map_private_resource(void *requested_addr, off_t offset,
+		size_t size);
+
+/**
  * Map a particular resource from a file.
  *
  * @param requested_addr
