diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index e346018e4b8..89f9accbca1 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -615,6 +615,19 @@ Supports inner packet L4 checksum.
   ``tx_offload_capa,tx_queue_offload_capa:DEV_TX_OFFLOAD_OUTER_UDP_CKSUM``.
 
 
+.. _nic_features_shared_rx_queue:
+
+Shared Rx queue
+---------------
+
+Supports shared Rx queue for ports in same Rx domain of a switch domain.
+
+* **[uses]     rte_eth_dev_info**: ``dev_capa:RTE_ETH_DEV_CAPA_RXQ_SHARE``.
+* **[uses]     rte_eth_dev_info，rte_eth_switch_info**: ``rx_domain``, ``domain_id``.
+* **[uses]     rte_eth_rxconf**: ``share_group``, ``share_qid``.
+* **[provides] mbuf**: ``mbuf.port``.
+
+
 .. _nic_features_packet_type_parsing:
 
 Packet type parsing
diff --git a/doc/guides/nics/features/default.ini b/doc/guides/nics/features/default.ini
index d473b94091a..93f5d1b46f4 100644
--- a/doc/guides/nics/features/default.ini
+++ b/doc/guides/nics/features/default.ini
@@ -19,6 +19,7 @@ Free Tx mbuf on demand =
 Queue start/stop     =
 Runtime Rx queue setup =
 Runtime Tx queue setup =
+Shared Rx queue      =
 Burst mode info      =
 Power mgmt address monitor =
 MTU update           =
diff --git a/doc/guides/prog_guide/switch_representation.rst b/doc/guides/prog_guide/switch_representation.rst
index ff6aa91c806..4f2532a91ea 100644
--- a/doc/guides/prog_guide/switch_representation.rst
+++ b/doc/guides/prog_guide/switch_representation.rst
@@ -123,6 +123,17 @@ thought as a software "patch panel" front-end for applications.
 .. [1] `Ethernet switch device driver model (switchdev)
        <https://www.kernel.org/doc/Documentation/networking/switchdev.txt>`_
 
+- For some PMDs, memory usage of representors is huge when number of
+  representor grows, mbufs are allocated for each descriptor of Rx queue.
+  Polling large number of ports brings more CPU load, cache miss and
+  latency. Shared Rx queue can be used to share Rx queue between PF and
+  representors among same Rx domain. ``RTE_ETH_DEV_CAPA_RXQ_SHARE`` in
+  device info is used to indicate the capability. Setting non-zero share
+  group in Rx queue configuration to enable share, share_qid is used to
+  identify the shared Rx queue in group. Polling any member port can
+  receive packets of all member ports in the group, port ID is saved in
+  ``mbuf.port``.
+
 Basic SR-IOV
 ------------
 
diff --git a/doc/guides/rel_notes/release_21_11.rst b/doc/guides/rel_notes/release_21_11.rst
index 3362c52a738..caf82242f2e 100644
--- a/doc/guides/rel_notes/release_21_11.rst
+++ b/doc/guides/rel_notes/release_21_11.rst
@@ -75,6 +75,12 @@ New Features
     operations.
   * Added multi-process support.
 
+* **Added ethdev shared Rx queue support.**
+
+  * Added new device capability flag and Rx domain field to switch info.
+  * Added share group and share queue ID to Rx queue configuration.
+  * Added testpmd support and dedicate forwarding engine.
+
 * **Added new RSS offload types for IPv4/L4 checksum in RSS flow.**
 
   Added macros ETH_RSS_IPV4_CHKSUM and ETH_RSS_L4_CHKSUM, now IPv4 and
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index 028907bc4b9..bc55f899f72 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -2159,6 +2159,14 @@ rte_eth_rx_queue_setup(uint16_t port_id, uint16_t rx_queue_id,
 		return -EINVAL;
 	}
 
+	if (local_conf.share_group > 0 &&
+	    (dev_info.dev_capa & RTE_ETH_DEV_CAPA_RXQ_SHARE) == 0) {
+		RTE_ETHDEV_LOG(ERR,
+			"Ethdev port_id=%d rx_queue_id=%d, enabled share_group=%hu while device doesn't support Rx queue share\n",
+			port_id, rx_queue_id, local_conf.share_group);
+		return -EINVAL;
+	}
+
 	/*
 	 * If LRO is enabled, check that the maximum aggregated packet
 	 * size is supported by the configured device.
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index 6d80514ba7a..34acc91273d 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -1044,6 +1044,14 @@ struct rte_eth_rxconf {
 	uint8_t rx_drop_en; /**< Drop packets if no descriptors are available. */
 	uint8_t rx_deferred_start; /**< Do not start queue with rte_eth_dev_start(). */
 	uint16_t rx_nseg; /**< Number of descriptions in rx_seg array. */
+	/**
+	 * Share group index in Rx domain and switch domain.
+	 * Non-zero value to enable Rx queue share, zero value disable share.
+	 * PMD is responsible for Rx queue consistency checks to avoid member
+	 * port's configuration contradict to each other.
+	 */
+	uint16_t share_group;
+	uint16_t share_qid; /**< Shared Rx queue ID in group. */
 	/**
 	 * Per-queue Rx offloads to be set using DEV_RX_OFFLOAD_* flags.
 	 * Only offloads set on rx_queue_offload_capa or rx_offload_capa
@@ -1445,6 +1453,16 @@ struct rte_eth_conf {
 #define RTE_ETH_DEV_CAPA_RUNTIME_RX_QUEUE_SETUP 0x00000001
 /** Device supports Tx queue setup after device started. */
 #define RTE_ETH_DEV_CAPA_RUNTIME_TX_QUEUE_SETUP 0x00000002
+/**
+ * Device supports shared Rx queue among ports within Rx domain and
+ * switch domain. Mbufs are consumed by shared Rx queue instead of
+ * each queue. Multiple groups are supported by share_group of Rx
+ * queue configuration. Shared Rx queue is identified by PMD using
+ * share_qid of Rx queue configuration. Polling any port in the group
+ * receive packets of all member ports, source port identified by
+ * mbuf->port field.
+ */
+#define RTE_ETH_DEV_CAPA_RXQ_SHARE              RTE_BIT64(2)
 /**@}*/
 
 /*
@@ -1488,6 +1506,12 @@ struct rte_eth_switch_info {
 	 * but each driver should explicitly define the mapping of switch
 	 * port identifier to that physical interconnect/switch
 	 */
+	/**
+	 * Shared Rx queue sub-domain boundary. Only ports in same Rx domain
+	 * and switch domain can share Rx queue. Valid only if device advertised
+	 * RTE_ETH_DEV_CAPA_RXQ_SHARE capability.
+	 */
+	uint16_t rx_domain;
 };
 
 /**
