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-rwxr-xr-xdocs/userguide/testusage.rst32
1 files changed, 32 insertions, 0 deletions
diff --git a/docs/userguide/testusage.rst b/docs/userguide/testusage.rst
index 9ee87788..97c74721 100755
--- a/docs/userguide/testusage.rst
+++ b/docs/userguide/testusage.rst
@@ -438,6 +438,38 @@ multiple VM NIC pairs.
**NOTE:** In case of linux_bridge, all guest NICs are connected to the same
bridge inside the guest.
+Selection of dpdk binding driver for tests with VMs
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+To select dpdk binding driver, which will specify which driver the vm NICs will
+use for dpdk bind, the following configuration parameter should be configured:
+
+.. code-block:: console
+
+ GUEST_DPDK_BIND_DRIVER = ['igb_uio_from_src']
+
+The supported dpdk guest bind drivers are:
+
+.. code-block:: console
+
+ 'uio_pci_generic' - Use uio_pci_generic driver
+ 'igb_uio_from_src' - Build and use the igb_uio driver from the dpdk src
+ files
+ 'vfio_no_iommu' - Use vfio with no iommu option. This requires custom
+ guest images that support this option. The default
+ vloop image does not support this driver.
+
+Note: uio_pci_generic does not support sr-iov testcases with guests attached.
+This is because uio_pci_generic only supports legacy interrupts. In case
+uio_pci_generic is selected with the vnf as QemuPciPassthrough it will be
+modified to use igb_uio_from_src instead.
+
+Note: vfio_no_iommu requires kernels equal to or greater than 4.5 and dpdk
+16.04 or greater. Using this option will also taint the kernel.
+
+Please refer to the dpdk documents at http://dpdk.org/doc/guides for more
+information on these drivers.
+
Multi-Queue Configuration
^^^^^^^^^^^^^^^^^^^^^^^^^