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authorChristian Trautman <ctrautma@redhat.com>2016-10-24 10:32:52 -0400
committerChristian Trautman <ctrautma@redhat.com>2016-10-24 10:32:52 -0400
commitadfdd0db071cf8247434cb456cc676144323719f (patch)
tree95d0e23fe42f6026de27d542423dd8825d84bc94 /docs
parent4f207bf80169d617d9965b19494f4c7d909f0abd (diff)
guest_binding: Add dpdk driver binding options for guests
Adds uio_pci_generic and vfio_no_iommu options for guest driver binding. In case of SR-IOV tests with guests attached and uio_pci_generic is selected the option will be modified to use igb_uio instead as uio_pci_generic is not supported. JIRA: VSPERF-397 Change-Id: I56003addacc8bf0d024cce35d41b00dd0baa8cbc signed-off-by: Christian Trautman <ctrautma@redhat.com>
Diffstat (limited to 'docs')
-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
^^^^^^^^^^^^^^^^^^^^^^^^^