diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h
index 3a701bd1f31b..3092c2c6f1d2 100644
--- a/include/uapi/linux/openvswitch.h
+++ b/include/uapi/linux/openvswitch.h
@@ -186,6 +186,11 @@ enum ovs_packet_cmd {
  * %OVS_PACKET_ATTR_USERSPACE action specify the Maximum received fragment
  * size.
  * @OVS_PACKET_ATTR_HASH: Packet hash info (e.g. hash, sw_hash and l4_hash in skb).
+ * @OVS_PACKET_ATTR_UPCALL_PID: Netlink PID to use for upcalls while
+ * processing %OVS_PACKET_CMD_EXECUTE.  Takes precedence over all other ways
+ * to determine the Netlink PID including %OVS_USERSPACE_ATTR_PID,
+ * %OVS_DP_ATTR_UPCALL_PID, %OVS_DP_ATTR_PER_CPU_PIDS and the
+ * %OVS_VPORT_ATTR_UPCALL_PID.
  *
  * These attributes follow the &struct ovs_header within the Generic Netlink
  * payload for %OVS_PACKET_* commands.
@@ -205,6 +210,7 @@ enum ovs_packet_attr {
 	OVS_PACKET_ATTR_MRU,	    /* Maximum received IP fragment size. */
 	OVS_PACKET_ATTR_LEN,	    /* Packet size before truncation. */
 	OVS_PACKET_ATTR_HASH,	    /* Packet hash. */
+	OVS_PACKET_ATTR_UPCALL_PID, /* u32 Netlink PID. */
 	__OVS_PACKET_ATTR_MAX
 };
 
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index 3add108340bf..2832e0794197 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -941,8 +941,10 @@ static int output_userspace(struct datapath *dp, struct sk_buff *skb,
 			break;
 
 		case OVS_USERSPACE_ATTR_PID:
-			if (dp->user_features &
-			    OVS_DP_F_DISPATCH_UPCALL_PER_CPU)
+			if (OVS_CB(skb)->upcall_pid)
+				upcall.portid = OVS_CB(skb)->upcall_pid;
+			else if (dp->user_features &
+				 OVS_DP_F_DISPATCH_UPCALL_PER_CPU)
 				upcall.portid =
 				  ovs_dp_get_upcall_portid(dp,
 							   smp_processor_id());
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index b990dc83504f..d5b6e2002bc1 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -267,7 +267,9 @@ void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key)
 		memset(&upcall, 0, sizeof(upcall));
 		upcall.cmd = OVS_PACKET_CMD_MISS;
 
-		if (dp->user_features & OVS_DP_F_DISPATCH_UPCALL_PER_CPU)
+		if (OVS_CB(skb)->upcall_pid)
+			upcall.portid = OVS_CB(skb)->upcall_pid;
+		else if (dp->user_features & OVS_DP_F_DISPATCH_UPCALL_PER_CPU)
 			upcall.portid =
 			    ovs_dp_get_upcall_portid(dp, smp_processor_id());
 		else
@@ -651,6 +653,9 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
 			       !!(hash & OVS_PACKET_HASH_L4_BIT));
 	}
 
+	OVS_CB(packet)->upcall_pid =
+		nla_get_u32_default(a[OVS_PACKET_ATTR_UPCALL_PID], 0);
+
 	/* Build an sw_flow for sending this packet. */
 	flow = ovs_flow_alloc();
 	err = PTR_ERR(flow);
@@ -719,6 +724,7 @@ static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
 	[OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG },
 	[OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 },
 	[OVS_PACKET_ATTR_HASH] = { .type = NLA_U64 },
+	[OVS_PACKET_ATTR_UPCALL_PID] = { .type = NLA_U32 },
 };
 
 static const struct genl_small_ops dp_packet_genl_ops[] = {
diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h
index cfeb817a1889..db0c3e69d66c 100644
--- a/net/openvswitch/datapath.h
+++ b/net/openvswitch/datapath.h
@@ -121,6 +121,8 @@ struct datapath {
  * @cutlen: The number of bytes from the packet end to be removed.
  * @probability: The sampling probability that was applied to this skb; 0 means
  * no sampling has occurred; U32_MAX means 100% probability.
+ * @upcall_pid: Netlink socket PID to use for sending this packet to userspace;
+ * 0 means "not set" and default per-CPU or per-vport dispatch should be used.
  */
 struct ovs_skb_cb {
 	struct vport		*input_vport;
@@ -128,6 +130,7 @@ struct ovs_skb_cb {
 	u16			acts_origlen;
 	u32			cutlen;
 	u32			probability;
+	u32			upcall_pid;
 };
 #define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
 
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index 8732f6e51ae5..6bbbc16ab778 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -501,6 +501,7 @@ int ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
 	OVS_CB(skb)->mru = 0;
 	OVS_CB(skb)->cutlen = 0;
 	OVS_CB(skb)->probability = 0;
+	OVS_CB(skb)->upcall_pid = 0;
 	if (unlikely(dev_net(skb->dev) != ovs_dp_get_net(vport->dp))) {
 		u32 mark;