diff --git a/lib/librte_eal/common/eal_common_proc.c b/lib/librte_eal/common/eal_common_proc.c
index 40fa982..d700e9e 100644
--- a/lib/librte_eal/common/eal_common_proc.c
+++ b/lib/librte_eal/common/eal_common_proc.c
@@ -5,11 +5,55 @@
 #include <stdio.h>
 #include <fcntl.h>
 #include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <limits.h>
+#include <unistd.h>
+#include <sys/un.h>
+#include <errno.h>
+#include <pthread.h>
+
+#include <rte_log.h>
 #include <rte_eal.h>
+#include <rte_errno.h>
+#include <rte_lcore.h>
+#include <rte_common.h>
 
+#include "eal_private.h"
 #include "eal_filesystem.h"
 #include "eal_internal_cfg.h"
 
+#define MAX_SECONDARY_PROCS	8
+#define MAX_ACTION_NAME_LEN	64
+#define MAX_UNIX_PATH_LEN	104
+#define MAX_MSG_LENGTH		1024
+#define SCM_MAX_FD		253 /* The max amount of fds */
+
+static int mp_fd = -1;
+static char *mp_sec_sockets[MAX_SECONDARY_PROCS];
+static pthread_mutex_t mp_mutex_action = PTHREAD_MUTEX_INITIALIZER;
+
+struct action_entry {
+	TAILQ_ENTRY(action_entry) next;      /**< Next attached action entry */
+
+#define MAX_ACTION_NAME_LEN	64
+	char action_name[MAX_ACTION_NAME_LEN];
+	rte_eal_mp_t action;
+};
+
+/** Double linked list of actions. */
+TAILQ_HEAD(action_entry_list, action_entry);
+
+static struct action_entry_list action_entry_list =
+	TAILQ_HEAD_INITIALIZER(action_entry_list);
+
+struct mp_msghdr {
+	char action_name[MAX_ACTION_NAME_LEN];
+	int fds_num;
+	int len_params;
+	char params[0];
+} __rte_packed;
+
 int
 rte_eal_primary_proc_alive(const char *config_file_path)
 {
@@ -31,3 +75,347 @@ rte_eal_primary_proc_alive(const char *config_file_path)
 
 	return !!ret;
 }
+
+static struct action_entry *
+find_action_entry_by_name(const char *name)
+{
+	int len = strlen(name);
+	struct action_entry *entry;
+
+	TAILQ_FOREACH(entry, &action_entry_list, next) {
+		if (strncmp(entry->action_name, name, len) == 0)
+			break;
+	}
+
+	return entry;
+}
+
+int
+rte_eal_mp_action_register(const char *action_name, rte_eal_mp_t action)
+{
+	struct action_entry *entry = malloc(sizeof(struct action_entry));
+
+	if (entry == NULL) {
+		rte_errno = -ENOMEM;
+		return -1;
+	}
+
+	if (strlen(action_name) > MAX_ACTION_NAME_LEN) {
+		rte_errno = -E2BIG;
+		return -1;
+	}
+
+	pthread_mutex_lock(&mp_mutex_action);
+	if (find_action_entry_by_name(action_name) != NULL) {
+		free(entry);
+		rte_errno = -EEXIST;
+		return -1;
+	}
+	strncpy(entry->action_name, action_name, MAX_ACTION_NAME_LEN);
+	entry->action = action;
+	TAILQ_INSERT_TAIL(&action_entry_list, entry, next);
+	pthread_mutex_unlock(&mp_mutex_action);
+	return 0;
+}
+
+void
+rte_eal_mp_action_unregister(const char *name)
+{
+	struct action_entry *entry;
+
+	pthread_mutex_lock(&mp_mutex_action);
+	entry = find_action_entry_by_name(name);
+	TAILQ_REMOVE(&action_entry_list, entry, next);
+	free(entry);
+	pthread_mutex_unlock(&mp_mutex_action);
+}
+
+static int
+read_msg(int fd, char *buf, int buflen, int *fds, int fds_num)
+{
+	int ret;
+	struct iovec iov;
+	struct msghdr msgh;
+	size_t fdsize = fds_num * sizeof(int);
+	char control[CMSG_SPACE(fdsize)];
+	struct cmsghdr *cmsg;
+
+	memset(&msgh, 0, sizeof(msgh));
+	iov.iov_base = buf;
+	iov.iov_len  = buflen;
+
+	msgh.msg_iov = &iov;
+	msgh.msg_iovlen = 1;
+	msgh.msg_control = control;
+	msgh.msg_controllen = sizeof(control);
+
+	ret = recvmsg(fd, &msgh, 0);
+	if (ret < 0) {
+		RTE_LOG(ERR, EAL, "recvmsg failed, %s\n", strerror(errno));
+		return -1;
+	}
+
+	if (msgh.msg_flags & (MSG_TRUNC | MSG_CTRUNC)) {
+		RTE_LOG(ERR, EAL, "truncted msg\n");
+		return -1;
+	}
+
+	/* read auxiliary FDs if any */
+	for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL;
+		cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
+		if ((cmsg->cmsg_level == SOL_SOCKET) &&
+			(cmsg->cmsg_type == SCM_RIGHTS)) {
+			memcpy(fds, CMSG_DATA(cmsg), fdsize);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static int
+process_msg(struct mp_msghdr *hdr, int len, int fds[])
+{
+	int ret;
+	int params_len;
+	struct action_entry *entry;
+
+	RTE_LOG(DEBUG, EAL, "msg: %s\n", hdr->action_name);
+
+	pthread_mutex_lock(&mp_mutex_action);
+	entry = find_action_entry_by_name(hdr->action_name);
+	if (entry == NULL) {
+		RTE_LOG(ERR, EAL, "cannot find action by: %s\n",
+			hdr->action_name);
+		pthread_mutex_unlock(&mp_mutex_action);
+		return -1;
+	}
+
+	params_len = len - sizeof(struct mp_msghdr);
+	ret = entry->action(hdr->params, params_len, fds, hdr->fds_num);
+	pthread_mutex_unlock(&mp_mutex_action);
+	return ret;
+
+}
+
+static void *
+mp_handle(void *arg __rte_unused)
+{
+	int len;
+	int fds[SCM_MAX_FD];
+	char buf[MAX_MSG_LENGTH];
+
+	while (1) {
+		len = read_msg(mp_fd, buf, MAX_MSG_LENGTH, fds, SCM_MAX_FD);
+		if (len > 0)
+			process_msg((struct mp_msghdr *)buf, len, fds);
+	}
+
+	return NULL;
+}
+
+static inline const char *
+get_unix_path(int is_server)
+{
+	static char unix_path[MAX_UNIX_PATH_LEN];
+	const char *prefix = eal_mp_unix_path();
+	const char *suffix = (is_server) ? "" : "_c";
+
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+		snprintf(unix_path, MAX_UNIX_PATH_LEN, "%s%s", prefix, suffix);
+	else
+		snprintf(unix_path, MAX_UNIX_PATH_LEN, "%s%s_%d",
+			 prefix, suffix, getpid());
+	return unix_path;
+}
+
+static int
+open_unix_fd(int is_server)
+{
+	int fd;
+	struct sockaddr_un un;
+
+	fd = socket(AF_UNIX, SOCK_DGRAM, 0);
+	if (fd < 0) {
+		RTE_LOG(ERR, EAL, "failed to create unix socket\n");
+		return -1;
+	}
+
+	memset(&un, 0, sizeof(un));
+	un.sun_family = AF_UNIX;
+	snprintf(un.sun_path, MAX_UNIX_PATH_LEN, "%s",
+		 get_unix_path(is_server));
+	unlink(un.sun_path); /* May still exist since last run */
+	if (bind(fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
+		RTE_LOG(ERR, EAL, "failed to bind %s: %s\n",
+			un.sun_path, strerror(errno));
+		close(fd);
+		return -1;
+	}
+
+	RTE_LOG(INFO, EAL, "bind to %s\n", un.sun_path);
+	return fd;
+}
+
+int
+rte_eal_mp_channel_init(void)
+{
+	pthread_t tid;
+	char thread_name[RTE_MAX_THREAD_NAME_LEN];
+
+	mp_fd = open_unix_fd(1);
+	if (mp_fd < 0)
+		return -1;
+
+	if (pthread_create(&tid, NULL, mp_handle, NULL) < 0) {
+		RTE_LOG(ERR, EAL, "failed to create mp handle thead: %s\n",
+			strerror(errno));
+		goto error;
+	}
+
+	snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN, "rte_mp_handle");
+	if (rte_thread_setname(tid, thread_name) < 0) {
+		RTE_LOG(ERR, EAL, "failed to set thead name\n");
+		goto error;
+	}
+
+	return 0;
+error:
+	close(mp_fd);
+	mp_fd = -1;
+	return -1;
+}
+
+static inline struct mp_msghdr *
+format_msg(const char *act_name, const void *p, int len_params, int fds_num)
+{
+	int len_msg;
+	struct mp_msghdr *msg;
+
+	len_msg = sizeof(struct mp_msghdr) + len_params;
+	if (len_msg > MAX_MSG_LENGTH) {
+		RTE_LOG(ERR, EAL, "Message is too long\n");
+		rte_errno = -EINVAL;
+		return NULL;
+	}
+
+	msg = malloc(len_msg);
+	if (!msg) {
+		RTE_LOG(ERR, EAL, "Cannot alloc memory for msg\n");
+		rte_errno = -ENOMEM;
+		return NULL;
+	}
+	memset(msg, 0, len_msg);
+	strcpy(msg->action_name, act_name);
+	msg->fds_num = fds_num;
+	msg->len_params = len_params;
+	memcpy(msg->params, p, len_params);
+	return msg;
+}
+
+static int
+send_msg(int fd, const char *dst_path, struct mp_msghdr *msg, int fds[])
+{
+	int ret;
+	struct msghdr msgh;
+	struct iovec iov;
+	size_t fd_size = msg->fds_num * sizeof(int);
+	char control[CMSG_SPACE(fd_size)];
+	struct cmsghdr *cmsg;
+	struct sockaddr_un dst;
+
+	memset(&dst, 0, sizeof(dst));
+	dst.sun_family = AF_UNIX;
+	snprintf(dst.sun_path, MAX_UNIX_PATH_LEN, "%s", dst_path);
+
+	memset(&msgh, 0, sizeof(msgh));
+	memset(control, 0, sizeof(control));
+
+	iov.iov_base = (uint8_t *)msg;
+	iov.iov_len = sizeof(struct mp_msghdr) + msg->len_params;
+
+	msgh.msg_name = &dst;
+	msgh.msg_namelen = sizeof(dst);
+	msgh.msg_iov = &iov;
+	msgh.msg_iovlen = 1;
+	msgh.msg_control = control;
+	msgh.msg_controllen = sizeof(control);
+
+	cmsg = CMSG_FIRSTHDR(&msgh);
+	cmsg->cmsg_len = CMSG_LEN(fd_size);
+	cmsg->cmsg_level = SOL_SOCKET;
+	cmsg->cmsg_type = SCM_RIGHTS;
+	memcpy(CMSG_DATA(cmsg), fds, fd_size);
+
+	do {
+		ret = sendmsg(fd, &msgh, 0);
+	} while (ret < 0 && errno == EINTR);
+
+	if (ret < 0) {
+		RTE_LOG(ERR, EAL, "failed to send msg: %s\n", strerror(errno));
+
+		if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+			RTE_LOG(ERR, EAL, "secondary process (%s) exited\n",
+				dst_path);
+		else if (!rte_eal_primary_proc_alive(NULL))
+			RTE_LOG(ERR, EAL, "primary process exited\n");
+
+		return 0;
+	}
+
+	return 1;
+}
+
+static int
+mp_send(const char *action_name,
+	const void *params,
+	int len_params,
+	int fds[],
+	int fds_num)
+{
+	int i;
+	int n = 0;
+	int sockfd;
+	struct mp_msghdr *msg;
+
+	if (fds_num > SCM_MAX_FD) {
+		RTE_LOG(ERR, EAL, "Cannot send more than %d FDs\n", SCM_MAX_FD);
+		rte_errno = -E2BIG;
+		return 0;
+	}
+
+	msg = format_msg(action_name, params, len_params, fds_num);
+	if (msg == NULL)
+		return 0;
+
+	if ((sockfd = open_unix_fd(0)) < 0) {
+		free(msg);
+		return 0;
+	}
+
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		/* broadcast to all secondaries */
+		for (i = 0; i < MAX_SECONDARY_PROCS; ++i) {
+			if (mp_sec_sockets[i] == NULL)
+				continue;
+
+			n += send_msg(sockfd, mp_sec_sockets[i], msg, fds);
+		}
+	} else
+		n += send_msg(sockfd, eal_mp_unix_path(), msg, fds);
+
+	free(msg);
+	close(sockfd);
+	return n;
+}
+
+int
+rte_eal_mp_sendmsg(const char *action_name,
+		   const void *params,
+		   int len_params,
+		   int fds[],
+		   int fds_num)
+{
+	RTE_LOG(DEBUG, EAL, "sendmsg: %s\n", action_name);
+	return mp_send(action_name, params, len_params, fds, fds_num);
+}
diff --git a/lib/librte_eal/common/eal_filesystem.h b/lib/librte_eal/common/eal_filesystem.h
index e8959eb..e95399b 100644
--- a/lib/librte_eal/common/eal_filesystem.h
+++ b/lib/librte_eal/common/eal_filesystem.h
@@ -38,6 +38,23 @@ eal_runtime_config_path(void)
 	return buffer;
 }
 
+/** Path of primary/secondary communication unix socket file. */
+#define MP_UNIX_PATH_FMT "%s/.%s_unix"
+static inline const char *
+eal_mp_unix_path(void)
+{
+	static char buffer[PATH_MAX]; /* static so auto-zeroed */
+	const char *directory = default_config_dir;
+	const char *home_dir = getenv("HOME");
+
+	if (getuid() != 0 && home_dir != NULL)
+		directory = home_dir;
+	snprintf(buffer, sizeof(buffer) - 1, MP_UNIX_PATH_FMT,
+		 directory, internal_config.hugefile_prefix);
+
+	return buffer;
+}
+
 /** Path of hugepage info file. */
 #define HUGEPAGE_INFO_FMT "%s/.%s_hugepage_info"
 
diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h
index c46dd8f..e36e3b5 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -195,4 +195,14 @@ int rte_eal_hugepage_attach(void);
  */
 struct rte_bus *rte_bus_find_by_device_name(const char *str);
 
+/**
+ * Create the unix channel for primary/secondary communication.
+ *
+ * @return
+ *   0 on success;
+ *   (<0) on failure.
+ */
+
+int rte_eal_mp_channel_init(void);
+
 #endif /* _EAL_PRIVATE_H_ */
diff --git a/lib/librte_eal/common/include/rte_eal.h b/lib/librte_eal/common/include/rte_eal.h
index 02fa109..9884c0b 100644
--- a/lib/librte_eal/common/include/rte_eal.h
+++ b/lib/librte_eal/common/include/rte_eal.h
@@ -186,6 +186,75 @@ int rte_eal_init(int argc, char **argv);
 int rte_eal_primary_proc_alive(const char *config_file_path);
 
 /**
+ * Action function typedef used by other components.
+ *
+ * As we create unix socket channel for primary/secondary communication, use
+ * this function typedef to register action for coming messages.
+ */
+typedef int (*rte_eal_mp_t)(const void *params, int len,
+			    int fds[], int fds_num);
+
+/**
+ * Register an action function for primary/secondary communication.
+ *
+ * Call this function to register an action, if the calling component wants
+ * to response the messages from the corresponding component in its primary
+ * process or secondary processes.
+ *
+ * @param action_name
+ *   The action_name argument plays as the nonredundant key to find the action.
+ *
+ * @param action
+ *   The action argument is the function pointer to the action function.
+ *
+ * @return
+ *  - 0 on success.
+ *  - (<0) on failure.
+ */
+int rte_eal_mp_action_register(const char *action_name, rte_eal_mp_t action);
+
+/**
+ * Unregister an action function for primary/secondary communication.
+ *
+ * Call this function to unregister an action  if the calling component does
+ * not want to response the messages from the corresponding component in its
+ * primary process or secondary processes.
+ *
+ * @param action_name
+ *   The action_name argument plays as the nonredundant key to find the action.
+ *
+ */
+void rte_eal_mp_action_unregister(const char *name);
+
+/**
+ * Send a message to the peer process.
+ *
+ * This function will send a message which will be responsed by the action
+ * identified by action_name of the process on the other side.
+ *
+ * @param action_name
+ *   The action_name argument is used to identify which action will be used.
+ *
+ * @param params
+ *   The params argument contains the customized message.
+ *
+ * @param len_params
+ *   The len_params argument is the length of the customized message.
+ *
+ * @param fds
+ *   The fds argument is an array of fds sent with sendmsg.
+ *
+ * @param fds_num
+ *   The fds_num argument is number of fds to be sent with sendmsg.
+ *
+ * @return
+ *  - Returns the number of messages being sent successfully.
+ */
+int
+rte_eal_mp_sendmsg(const char *action_name, const void *params,
+		   int len_params, int fds[], int fds_num);
+
+/**
  * Usage function typedef used by the application usage function.
  *
  * Use this function typedef to define and call rte_set_application_usage_hook()
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 229eec9..f231724 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -896,6 +896,14 @@ rte_eal_init(int argc, char **argv)
 
 	eal_check_mem_on_local_socket();
 
+	if (rte_eal_mp_channel_init() < 0) {
+		rte_eal_init_alert("failed to init mp channel\n");
+		if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+			rte_errno = EFAULT;
+			return -1;
+		}
+	}
+
 	eal_thread_init_master(rte_config.master_lcore);
 
 	ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
index f4f46c1..5dacde5 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -235,4 +235,13 @@ EXPERIMENTAL {
 	rte_service_set_stats_enable;
 	rte_service_start_with_defaults;
 
+} DPDK_17.08;
+
+DPDK_18.02 {
+	global:
+
+	rte_eal_mp_action_register;
+	rte_eal_mp_action_unregister;
+	rte_eal_mp_sendmsg;
+
 } DPDK_17.11;
