diff --git a/test_plans/vm2vm_virtio_user_cbdma_test_plan.rst b/test_plans/vm2vm_virtio_user_cbdma_test_plan.rst
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+.. Copyright (c) <2022>, 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
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+   COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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+   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+   OF THE POSSIBILITY OF SUCH DAMAGE.
+
+==================================================
+VM2VM vhost-user/virtio-user with CBDMA test plan
+==================================================
+
+Description
+===========
+
+Vhost asynchronous data path leverages DMA devices to offload memory copies from the CPU and it is implemented in an asynchronous way.
+In addition, vhost supports M:N mapping between vrings and DMA virtual channels. Specifically, one vring can use multiple different DMA
+channels and one DMA channel can be shared by multiple vrings at the same time.Vhost enqueue operation with CBDMA channels is supported
+in both split and packed ring.
+
+This document provides the test plan for testing the following features when Vhost-user using asynchronous data path with
+CBDMA channels in VM2VM virtio-user topology.
+1. Split virtqueue vm2vm in-order mergeable, in-order non-mergeable, mergeable, non-mergeable, vector_rx path test and payload check.
+2. Packed virtqueue vm2vm in-order mergeable, in-order non-mergeable, mergeable, non-mergeable, vectorized path (ringsize not powerof 2) test and payload check.
+3. Test indirect descriptor feature. 
+For example, the split ring mergeable inorder path use non-indirect descriptor, the 2000,2000,2000,2000 chain packets will need 4 consequent ring, 
+still need one ring put header. 
+The split ring mergeable path use indirect descriptor, the 2000,2000,2000,2000 chain packets will only occupy one ring.
+
+Note:
+1.When DMA devices are bound to vfio driver, VA mode is the default and recommended. For PA mode, page by page mapping may
+exceed IOMMU's max capability, better to use 1G guest hugepage.
+2.DPDK local patch that about vhost pmd is needed when testing Vhost asynchronous data path with testpmd.
+
+For more about dpdk-testpmd sample, please refer to the DPDK docments:
+https://doc.dpdk.org/guides/testpmd_app_ug/run_app.html
+For virtio-user vdev parameter, you can refer to the DPDK docments:
+https://doc.dpdk.org/guides/nics/virtio.html#virtio-paths-selection-and-usage.
+
+Prerequisites
+=============
+
+Topology
+--------
+Test flow: Virtio-user-->Vhost-user-->Testpmd-->Vhost-user-->Virtio-user
+
+General set up
+--------------
+1. Compile DPDK::
+
+      # CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=<dpdk build dir>
+      # ninja -C <dpdk build dir> -j 110
+      For example:
+      CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=x86_64-native-linuxapp-gcc
+      ninja -C x86_64-native-linuxapp-gcc -j 110
+
+2. Get the PCI device ID and DMA device ID of DUT, for example, 0000:18:00.0 is PCI device ID, 0000:00:04.0, 0000:00:04.1 is DMA device ID::
+
+      <dpdk dir># ./usertools/dpdk-devbind.py -s
+
+      Network devices using kernel driver
+      ===================================
+      0000:18:00.0 'Device 159b' if=ens785f0 drv=ice unused=vfio-pci
+
+      DMA devices using kernel driver
+      ===============================
+      0000:00:04.0 'Sky Lake-E CBDMA Registers 2021' drv=ioatdma unused=vfio-pci
+      0000:00:04.1 'Sky Lake-E CBDMA Registers 2021' drv=ioatdma unused=vfio-pci
+
+Test case
+=========
+
+Common steps
+------------
+1. Bind 1 NIC port and CBDMA channels to vfio-pci::
+
+      <dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci <DUT port pci device id>
+      <dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci <DUT port DMA device id>
+
+      For example, 2 CBDMA channels:
+      <dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci 0000:00:04.0,0000:00:04.1
+
+Test Case 1: split virtqueue vm2vm non-mergeable path multi-queues payload check with cbdma enable
+--------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user split ring non-mergeable path 
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 2 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 -a 0000:00:04.0 -a 0000:00:04.1 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 \
+    --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=0,mrg_rxbuf=0,in_order=0,queue_size=4096 \
+    -- -i --enable-hw-vlan-strip --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 \
+    --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=0,mrg_rxbuf=0,in_order=0,queue_size=4096 \
+    -- -i --enable-hw-vlan-strip --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set burst 1
+    testpmd>set txpkts 64,128,256,512
+    testpmd>start tx_first 27
+    testpmd>stop
+    testpmd>set burst 32
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set txpkts 64
+    testpmd>start tx_first 1
+    testpmd>stop
+
+6. Start vhost testpmd, check virtio-user1 RX-packets is 566 and RX-bytes is 486016, 54 packets with 960 length and 512 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 -a 0000:00:04.0 -a 0000:00:04.1 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1]
+
+10. Rerun step 3.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 1
+	testpmd>set txpkts 64,128,256,512
+	testpmd>start tx_first 27
+	testpmd>stop
+	testpmd>set burst 32
+	testpmd>start tx_first 7
+	testpmd>stop
+	testpmd>set txpkts 64
+	testpmd>start tx_first 1
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 2: split virtqueue vm2vm mergeable path multi-queues payload check with cbdma enable
+----------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user split ring mergeable path
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 1 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 -a 0000:00:04.0 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=0,mrg_rxbuf=1,in_order=0,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+      -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=0,mrg_rxbuf=1,in_order=0,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+
+6. Start vhost testpmd, check 502 packets and 279232 bytes received by virtio-user1 and 54 packets with 4640 length and 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 -a 0000:00:04.0 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0]
+
+10. Rerun step 3.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 3: split virtqueue vm2vm inorder non-mergeable path multi-queues payload check with cbdma enable
+----------------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user split ring inorder non-mergeable path
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 5 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=0,mrg_rxbuf=0,in_order=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=0,mrg_rxbuf=0,in_order=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+
+6. Start vhost testpmd, check 448 packets and 28672 bytes received by virtio-user1 and 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048'
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4]
+
+10. Rerun step 4.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 4: split virtqueue vm2vm vectorized path multi-queues payload check with cbdma enable
+-----------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user split ring vectorized path
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 8 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4,lcore11@0000:00:04.5,lcore11@0000:00:04.6,lcore11@0000:00:04.7]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,mrg_rxbuf=0,in_order=0,vectorized=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,mrg_rxbuf=0,in_order=0,vectorized=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+
+6. Start vhost testpmd, check 448 packets and 28672 bytes received by virtio-user1 and 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4,lcore11@0000:00:04.5,lcore11@0000:00:04.6,lcore11@0000:00:04.7]
+
+10. Rerun step 4.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 5: Split virtqueue vm2vm inorder mergeable path test non-indirect descriptor with cbdma enable
+--------------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid and non-indirect descriptor after packets forwarding in vhost-user/virtio-user
+split ring inorder mergeable path and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both 
+iova as VA and PA mode test.
+
+1. Bind 4 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch testpmd by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 \
+    --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=0,mrg_rxbuf=1,in_order=1,queue_size=256 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send packets(include 251 small packets and 32 8K packets)::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 \
+    --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=0,mrg_rxbuf=1,in_order=1,queue_size=256 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256
+    testpmd>set burst 1
+    testpmd>start tx_first 27
+    testpmd>stop
+    testpmd>set burst 32
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set txpkts 2000,2000,2000,2000
+    testpmd>start tx_first 1
+    testpmd>stop
+
+6. Start vhost, then quit pdump and three testpmd, about split virtqueue inorder mergeable path, it use the non-indirect descriptors,
+the 8k length pkt will occupies 5 ring:2000,2000,2000,2000 will need 4 consequent ring,
+still need one ring put header. So check 504 packets and 48128 bytes received by virtio-user1 and 502 packets with 64 length and 2 packets with 8K length in pdump-virtio-rx.pcap.
+
+7. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3]
+
+8. Rerun step 3-6.
+
+Test Case 6: Split virtqueue vm2vm mergeable path test indirect descriptor with cbdma enable
+--------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid and indirect descriptor after packets forwarding in vhost-user/virtio-user
+split ring mergeable path and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both
+iova as VA and PA mode test.
+
+1. Bind 4 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch testpmd by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 \
+    --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=0,mrg_rxbuf=1,in_order=0,queue_size=256 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send packets(include 251 small packets and 32 8K packets)::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 \
+    --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=0,mrg_rxbuf=1,in_order=0,queue_size=256 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256
+    testpmd>set burst 1
+    testpmd>start tx_first 27
+    testpmd>stop
+    testpmd>set burst 32
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set txpkts 2000,2000,2000,2000
+    testpmd>start tx_first 1
+    testpmd>stop
+
+6. Start vhost, then quit pdump and three testpmd, about split virtqueue mergeable path, it use the indirect descriptors, the 8k length pkt will just occupies one ring.
+So check 512 packets and 112128 bytes received by virtio-user1 and 502 packets with 64 length and 10 packets with 8K length in pdump-virtio-rx.pcap.
+
+7. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3]
+
+8. Rerun step 3-6.
+
+Test Case 7: packed virtqueue vm2vm non-mergeable path multi-queues payload check with cbdma enable
+---------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user packed ring non-mergeable path
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 2 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 -a 0000:00:04.0 -a 0000:00:04.1 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 \
+    --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=1,mrg_rxbuf=0,in_order=0,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 \
+    --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=1,mrg_rxbuf=0,in_order=0,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+
+6. Start vhost testpmd, quit pdump and check virtio-user1 RX-packets is 448 and RX-bytes is 28672, 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 -a 0000:00:04.0 -a 0000:00:04.1 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1]
+
+10. Rerun step 4.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 8: packed virtqueue vm2vm mergeable path multi-queues payload check with cbdma enable
+-----------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user packed ring mergeable path
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 1 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 -a 0000:00:04.0 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=1,mrg_rxbuf=1,in_order=0,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=1,mrg_rxbuf=1,in_order=0,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+
+6. Start vhost testpmd, then quit pdump, check 502 packets and 279232 bytes received by virtio-user1 and 54 packets with 4640 length and 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 -a 0000:00:04.0 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0]
+
+10. Rerun step 4.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 9: packed virtqueue vm2vm inorder mergeable path multi-queues payload check with cbdma enable
+-------------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user packed ring inorder mergeable path
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 5 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=1,mrg_rxbuf=1,in_order=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send 8k length packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=1,mrg_rxbuf=1,in_order=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+
+6. Start vhost testpmd, then quit pdump, check 502 packets and 279232 bytes received by virtio-user1 and 54 packets with 4640 length and 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4]
+
+10. Rerun step 4.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 10: packed virtqueue vm2vm inorder non-mergeable path multi-queues payload check with cbdma enable
+------------------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user packed ring inorder non-mergeable path
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 8 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4,lcore11@0000:00:04.5,lcore11@0000:00:04.6,lcore11@0000:00:04.7]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=1,mrg_rxbuf=0,in_order=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send 8k length packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=1,mrg_rxbuf=0,in_order=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+
+6. Start vhost testpmd, then quit pdump, check 448 packets and 28672 bytes received by virtio-user1 and 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4,lcore11@0000:00:04.5,lcore11@0000:00:04.6,lcore11@0000:00:04.7]
+
+10. Rerun step 4.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 11: packed virtqueue vm2vm vectorized-rx path multi-queues payload check with indirect descriptor and cbdma enable
+----------------------------------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user packed ring vectorizedi-rx path
+and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 8 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=2 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore12@0000:00:04.4,lcore12@0000:00:04.5,lcore12@0000:00:04.6,lcore12@0000:00:04.7]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 --force-max-simd-bitwidth=512 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=1,mrg_rxbuf=0,in_order=1,vectorized=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send 8k length packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --force-max-simd-bitwidth=512 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=1,mrg_rxbuf=0,in_order=1,vectorized=1,queue_size=4096 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096
+
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+
+6. Start vhost testpmd, then quit pdump, check 448 packets and 28672 bytes received by virtio-user1 and 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=2 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore12@0000:00:04.3,lcore12@0000:00:04.4,lcore12@0000:00:04.5,lcore12@0000:00:04.6,lcore12@0000:00:04.7]
+
+10. Rerun step 4.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 12: packed virtqueue vm2vm vectorized path multi-queues payload check with ring size is not power of 2 and cbdma enable
+---------------------------------------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid after packets forwarding in vhost-user/virtio-user packed ring vectorized path
+with ring size is not power of 2 and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels. Both iova as VA and PA mode test.
+
+1. Bind 8 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4,lcore11@0000:00:04.5,lcore11@0000:00:04.6,lcore11@0000:00:04.7]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --force-max-simd-bitwidth=512  --no-pci --file-prefix=virtio1 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=1,mrg_rxbuf=0,in_order=1,vectorized=1,queue_size=4097 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4097 --rxd=4097
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send 8k length packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --force-max-simd-bitwidth=512 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=1,mrg_rxbuf=0,in_order=1,vectorized=1,queue_size=4097 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4097 --rxd=4097
+
+    testpmd>set burst 32
+    testpmd>set txpkts 64
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set burst 1
+    testpmd>set txpkts 64,256,2000,64,256,2000
+    testpmd>start tx_first 27
+    testpmd>stop
+
+6. Start vhost testpmd, then quit pdump, check 448 packets and 28672 bytes received by virtio-user1 and 448 packets with 64 length in pdump-virtio-rx.pcap.
+
+7. Quit vhost testpmd::
+
+    testpmd>quit
+
+8. Clear virtio-user1 port stats, execute below command::
+
+    testpmd>stop
+    testpmd>clear port stats all
+    testpmd>start
+
+9. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=4096 --rxd=4096 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore12@0000:00:04.3,lcore12@0000:00:04.4,lcore12@0000:00:04.5,lcore12@0000:00:04.6,lcore12@0000:00:04.7]
+
+10. Rerun step 4.
+
+11. Virtio-user0 send packets::
+
+	testpmd>set burst 32
+	testpmd>set txpkts 64
+	testpmd>start tx_first 7
+	testpmd>stop
+	testpmd>set burst 1
+	testpmd>set txpkts 64,256,2000,64,256,2000
+	testpmd>start tx_first 27
+	testpmd>stop
+
+12. Rerun step 6.
+
+Test Case 13: packed virtqueue vm2vm vectorized-tx path multi-queues test indirect descriptor with cbdma enable
+---------------------------------------------------------------------------------------------------------------
+This case uses testpmd to test the payload is valid and indirect descriptor after packets forwarding in vhost-user/virtio-user
+packed ring vectorized-tx path and multi-queues when vhost uses the asynchronous enqueue operations with CBDMA channels.
+Both iova as VA and PA mode test.
+
+1. Bind 8 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4,lcore11@0000:00:04.5,lcore11@0000:00:04.6,lcore11@0000:00:04.7]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 --force-max-simd-bitwidth=512 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=2,server=1,packed_vq=1,mrg_rxbuf=1,in_order=1,vectorized=1,queue_size=256 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send 8k length packets::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --force-max-simd-bitwidth=512 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,server=1,packed_vq=1,mrg_rxbuf=1,in_order=1,vectorized=1,queue_size=256 \
+    -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256
+
+    testpmd>set burst 1
+    testpmd>start tx_first 27
+    testpmd>stop
+    testpmd>set burst 32
+    testpmd>start tx_first 7
+    testpmd>stop
+    testpmd>set txpkts 2000,2000,2000,2000
+    testpmd>start tx_first 1
+    testpmd>stop
+
+6. Start vhost, then quit pdump and three testpmd, about packed virtqueue vectorized-tx path, it use the indirect descriptors, the 8k length pkt will just occupies one ring.
+So check 512 packets and 112128 bytes received by virtio-user1 and 502 packets with 64 length and 10 packets with 8K length in pdump-virtio-rx.pcap.
+
+7. Relaunch vhost with iova=pa by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=2,client=1,dmas=[txq0;txq1],dma_ring_size=2048' \
+    --iova=pa -- -i --nb-cores=1 --rxq=2 --txq=2 --txd=256 --rxd=256 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4,lcore11@0000:00:04.5,lcore11@0000:00:04.6,lcore11@0000:00:04.7]
+
+8. Rerun step 3-6.
+
+Test Case 14: packed virtqueue vm2vm vectorized-tx path test batch processing with cbdma enable
+-----------------------------------------------------------------------------------------------
+This case uses testpmd to test that one packet can forwarding in vhost-user/virtio-user packed ring vectorized-tx path 
+when vhost uses the asynchronous enqueue operations with CBDMA channels.
+
+1. Bind 8 CBDMA channel to vfio-pci, as common step 1.
+
+2. Launch vhost by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 10-18 -n 4 \
+    -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
+    --vdev 'eth_vhost0,iface=vhost-net,queues=1,client=1,dmas=[txq0],dma_ring_size=2048' \
+    --vdev 'eth_vhost1,iface=vhost-net1,queues=1,client=1,dmas=[txq0],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=1 --rxq=1 --txq=1 --txd=256 --rxd=256 --no-flush-rx \
+    --lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore11@0000:00:04.4,lcore11@0000:00:04.5,lcore11@0000:00:04.6,lcore11@0000:00:04.7]
+
+3. Launch virtio-user1 by below command::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 7-8 --no-pci --file-prefix=virtio1 --force-max-simd-bitwidth=512 \
+    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=1,server=1,packed_vq=1,mrg_rxbuf=1,in_order=1,vectorized=1,queue_size=256 \
+    -- -i --nb-cores=1 --rxq=1 --txq=1 --txd=256 --rxd=256
+    testpmd>set fwd rxonly
+    testpmd>start
+
+4. Attach pdump secondary process to primary process of virtio-user1 by same file-prefix::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 \
+    -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=./pdump-virtio-rx.pcap,mbuf-size=8000'
+
+5. Launch virtio-user0 and send 1 packet::
+
+    <dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --force-max-simd-bitwidth=512 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=1,server=1,packed_vq=1,mrg_rxbuf=1,in_order=1,vectorized=1,queue_size=256 \
+    -- -i --nb-cores=1 --rxq=1 --txq=1 --txd=256 --rxd=256
+    testpmd>set burst 1
+    testpmd>start tx_first 1
+    testpmd>stop
+
+6. Start vhost, then quit pdump and three testpmd, check 1 packet and 64 bytes received by virtio-user1 and 1 packet with 64 length in pdump-virtio-rx.pcap.
