diff --git a/lib/librte_vhost/rte_vdpa.h b/lib/librte_vhost/rte_vdpa.h
index fff657391..02b8d14ed 100644
--- a/lib/librte_vhost/rte_vdpa.h
+++ b/lib/librte_vhost/rte_vdpa.h
@@ -173,4 +173,43 @@ rte_vdpa_get_device_num(void);
  */
 int __rte_experimental
 rte_vhost_host_notifier_ctrl(int vid, bool enable);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Synchronize the available ring from guest to mediate ring, help to
+ * check desc validity to protect against malicious guest driver.
+ *
+ * @param vid
+ *  vhost device id
+ * @param qid
+ *  vhost queue id
+ * @param vring_m
+ *  mediate virtio ring pointer
+ * @return
+ *  number of synced available entries on success, -1 on failure
+ */
+int __rte_experimental
+rte_vdpa_relay_vring_avail(int vid, uint16_t qid, void *vring_m);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Synchronize the used ring from mediate ring to guest, log dirty
+ * page for each writeable buffer, caller should handle the used
+ * ring logging before device stop.
+ *
+ * @param vid
+ *  vhost device id
+ * @param qid
+ *  vhost queue id
+ * @param vring_m
+ *  mediate virtio ring pointer
+ * @return
+ *  number of synced used entries on success, -1 on failure
+ */
+int __rte_experimental
+rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m);
 #endif /* _RTE_VDPA_H_ */
diff --git a/lib/librte_vhost/rte_vhost_version.map b/lib/librte_vhost/rte_vhost_version.map
index 22302e972..dd3b4c1cb 100644
--- a/lib/librte_vhost/rte_vhost_version.map
+++ b/lib/librte_vhost/rte_vhost_version.map
@@ -84,4 +84,6 @@ EXPERIMENTAL {
 	rte_vhost_crypto_set_zero_copy;
 	rte_vhost_va_from_guest_pa;
 	rte_vhost_host_notifier_ctrl;
+	rte_vdpa_relay_vring_avail;
+	rte_vdpa_relay_vring_used;
 };
diff --git a/lib/librte_vhost/vdpa.c b/lib/librte_vhost/vdpa.c
index e7d849ee0..dcf6c3b8e 100644
--- a/lib/librte_vhost/vdpa.c
+++ b/lib/librte_vhost/vdpa.c
@@ -122,3 +122,197 @@ rte_vdpa_get_device_num(void)
 {
 	return vdpa_device_num;
 }
+
+static bool
+invalid_desc_check(struct virtio_net *dev, struct vhost_virtqueue *vq,
+		uint64_t desc_iova, uint64_t desc_len, uint8_t perm)
+{
+	uint64_t desc_addr, desc_chunck_len;
+
+	while (desc_len) {
+		desc_chunck_len = desc_len;
+		desc_addr = vhost_iova_to_vva(dev, vq,
+				desc_iova,
+				&desc_chunck_len,
+				perm);
+
+		if (!desc_addr)
+			return true;
+
+		desc_len -= desc_chunck_len;
+		desc_iova += desc_chunck_len;
+	}
+
+	return false;
+}
+
+int
+rte_vdpa_relay_vring_avail(int vid, uint16_t qid, void *vring_m)
+{
+	struct virtio_net *dev = get_device(vid);
+	uint16_t idx, idx_m, desc_id;
+	struct vring_desc desc;
+	struct vhost_virtqueue *vq;
+	struct vring_desc *desc_ring;
+	struct vring_desc *idesc = NULL;
+	struct vring *s_vring;
+	uint64_t dlen;
+	int ret;
+	uint8_t perm;
+
+	if (!dev || !vring_m)
+		return -1;
+
+	if (qid >= dev->nr_vring)
+		return -1;
+
+	if (vq_is_packed(dev))
+		return -1;
+
+	s_vring = (struct vring *)vring_m;
+	vq = dev->virtqueue[qid];
+	idx = vq->avail->idx;
+	idx_m = s_vring->avail->idx;
+	ret = (uint16_t)(idx - idx_m);
+
+	while (idx_m != idx) {
+		/* avail entry copy */
+		desc_id = vq->avail->ring[idx_m & (vq->size - 1)];
+		s_vring->avail->ring[idx_m & (vq->size - 1)] = desc_id;
+		desc_ring = vq->desc;
+
+		if (vq->desc[desc_id].flags & VRING_DESC_F_INDIRECT) {
+			dlen = vq->desc[desc_id].len;
+			desc_ring = (struct vring_desc *)(uintptr_t)
+				vhost_iova_to_vva(dev, vq,
+						vq->desc[desc_id].addr, &dlen,
+						VHOST_ACCESS_RO);
+			if (unlikely(!desc_ring))
+				return -1;
+
+			if (unlikely(dlen < vq->desc[idx].len)) {
+				idesc = alloc_copy_ind_table(dev, vq,
+						vq->desc[idx].addr,
+						vq->desc[idx].len);
+				if (unlikely(!idesc))
+					return -1;
+
+				desc_ring = idesc;
+			}
+
+			desc_id = 0;
+		}
+
+		/* check if the buf addr is within the guest memory */
+		do {
+			desc = desc_ring[desc_id];
+			perm = desc.flags & VRING_DESC_F_WRITE ?
+				VHOST_ACCESS_WO : VHOST_ACCESS_RO;
+			if (invalid_desc_check(dev, vq, desc.addr, desc.len,
+						perm)) {
+				if (unlikely(idesc))
+					free_ind_table(idesc);
+				return -1;
+			}
+			desc_id = desc.next;
+		} while (desc.flags & VRING_DESC_F_NEXT);
+
+		if (unlikely(idesc)) {
+			free_ind_table(idesc);
+			idesc = NULL;
+		}
+
+		idx_m++;
+	}
+
+	rte_smp_wmb();
+	s_vring->avail->idx = idx;
+
+	if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
+		vhost_avail_event(vq) = idx;
+
+	return ret;
+}
+
+int
+rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m)
+{
+	struct virtio_net *dev = get_device(vid);
+	uint16_t idx, idx_m, desc_id;
+	struct vhost_virtqueue *vq;
+	struct vring_desc desc;
+	struct vring_desc *desc_ring;
+	struct vring_desc *idesc = NULL;
+	struct vring *s_vring;
+	uint64_t dlen;
+	int ret;
+
+	if (!dev || !vring_m)
+		return -1;
+
+	if (qid >= dev->nr_vring)
+		return -1;
+
+	if (vq_is_packed(dev))
+		return -1;
+
+	s_vring = (struct vring *)vring_m;
+	vq = dev->virtqueue[qid];
+	idx = vq->used->idx;
+	idx_m = s_vring->used->idx;
+	ret = (uint16_t)(idx_m - idx);
+
+	while (idx != idx_m) {
+		/* copy used entry, used ring logging is not covered here */
+		vq->used->ring[idx & (vq->size - 1)] =
+			s_vring->used->ring[idx & (vq->size - 1)];
+
+		desc_id = vq->used->ring[idx & (vq->size - 1)].id;
+		desc_ring = vq->desc;
+
+		if (vq->desc[desc_id].flags & VRING_DESC_F_INDIRECT) {
+			dlen = vq->desc[desc_id].len;
+			desc_ring = (struct vring_desc *)(uintptr_t)
+				vhost_iova_to_vva(dev, vq,
+						vq->desc[desc_id].addr, &dlen,
+						VHOST_ACCESS_RO);
+			if (unlikely(!desc_ring))
+				return -1;
+
+			if (unlikely(dlen < vq->desc[idx].len)) {
+				idesc = alloc_copy_ind_table(dev, vq,
+						vq->desc[idx].addr,
+						vq->desc[idx].len);
+				if (unlikely(!idesc))
+					return -1;
+
+				desc_ring = idesc;
+			}
+
+			desc_id = 0;
+		}
+
+		/* dirty page logging for DMA writeable buffer */
+		do {
+			desc = desc_ring[desc_id];
+			if (desc.flags & VRING_DESC_F_WRITE)
+				vhost_log_write(dev, desc.addr, desc.len);
+			desc_id = desc.next;
+		} while (desc.flags & VRING_DESC_F_NEXT);
+
+		if (unlikely(idesc)) {
+			free_ind_table(idesc);
+			idesc = NULL;
+		}
+
+		idx++;
+	}
+
+	rte_smp_wmb();
+	vq->used->idx = idx_m;
+
+	if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
+		vring_used_event(s_vring) = idx_m;
+
+	return ret;
+}
diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 5218f1b12..2164cd6d9 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -18,6 +18,7 @@
 #include <rte_log.h>
 #include <rte_ether.h>
 #include <rte_rwlock.h>
+#include <rte_malloc.h>
 
 #include "rte_vhost.h"
 #include "rte_vdpa.h"
@@ -753,4 +754,43 @@ vhost_vring_call_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
 		eventfd_write(vq->callfd, (eventfd_t)1);
 }
 
+static __rte_always_inline void *
+alloc_copy_ind_table(struct virtio_net *dev, struct vhost_virtqueue *vq,
+		uint64_t desc_addr, uint64_t desc_len)
+{
+	void *idesc;
+	uint64_t src, dst;
+	uint64_t len, remain = desc_len;
+
+	idesc = rte_malloc(__func__, desc_len, 0);
+	if (unlikely(!idesc))
+		return 0;
+
+	dst = (uint64_t)(uintptr_t)idesc;
+
+	while (remain) {
+		len = remain;
+		src = vhost_iova_to_vva(dev, vq, desc_addr, &len,
+				VHOST_ACCESS_RO);
+		if (unlikely(!src || !len)) {
+			rte_free(idesc);
+			return 0;
+		}
+
+		rte_memcpy((void *)(uintptr_t)dst, (void *)(uintptr_t)src, len);
+
+		remain -= len;
+		dst += len;
+		desc_addr += len;
+	}
+
+	return idesc;
+}
+
+static __rte_always_inline void
+free_ind_table(void *idesc)
+{
+	rte_free(idesc);
+}
+
 #endif /* _VHOST_NET_CDEV_H_ */
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 5e1a1a727..8c657a101 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -37,45 +37,6 @@ is_valid_virt_queue_idx(uint32_t idx, int is_tx, uint32_t nr_vring)
 	return (is_tx ^ (idx & 1)) == 0 && idx < nr_vring;
 }
 
-static __rte_always_inline void *
-alloc_copy_ind_table(struct virtio_net *dev, struct vhost_virtqueue *vq,
-		uint64_t desc_addr, uint64_t desc_len)
-{
-	void *idesc;
-	uint64_t src, dst;
-	uint64_t len, remain = desc_len;
-
-	idesc = rte_malloc(__func__, desc_len, 0);
-	if (unlikely(!idesc))
-		return 0;
-
-	dst = (uint64_t)(uintptr_t)idesc;
-
-	while (remain) {
-		len = remain;
-		src = vhost_iova_to_vva(dev, vq, desc_addr, &len,
-				VHOST_ACCESS_RO);
-		if (unlikely(!src || !len)) {
-			rte_free(idesc);
-			return 0;
-		}
-
-		rte_memcpy((void *)(uintptr_t)dst, (void *)(uintptr_t)src, len);
-
-		remain -= len;
-		dst += len;
-		desc_addr += len;
-	}
-
-	return idesc;
-}
-
-static __rte_always_inline void
-free_ind_table(void *idesc)
-{
-	rte_free(idesc);
-}
-
 static __rte_always_inline void
 do_flush_shadow_used_ring_split(struct virtio_net *dev,
 			struct vhost_virtqueue *vq,
