New upstream version 18.11-rc4

[deb_dpdk.git] / doc / guides / linux_gsg / linux_drivers.rst

diff --git a/doc/guides/linux_gsg/linux_drivers.rst b/doc/guides/linux_gsg/linux_drivers.rst
index 14381ee..8da6a31 100644 (file)
--- a/doc/guides/linux_gsg/linux_drivers.rst
+++ b/doc/guides/linux_gsg/linux_drivers.rst
@@ -1,6 +1,6 @@
 ..  SPDX-License-Identifier: BSD-3-Clause
     Copyright(c) 2010-2015 Intel Corporation.
-    Copyright(c) 2017 Mellanox Corporation.
+    Copyright 2017 Mellanox Technologies, Ltd
     All rights reserved.
 
 .. _linux_gsg_linux_drivers:
@@ -48,6 +48,13 @@ be loaded as shown below:
    ``vfio-pci`` kernel module rather than ``igb_uio`` or ``uio_pci_generic``.
    For more details see :ref:`linux_gsg_binding_kernel` below.
 
+.. note::
+
+   If the devices used for DPDK are bound to the ``uio_pci_generic`` kernel module,
+   please make sure that the IOMMU is disabled or passthrough. One can add
+   ``intel_iommu=off`` or ``amd_iommu=off`` or ``intel_iommu=on iommu=pt``in GRUB
+   command line on x86_64 systems, or add ``iommu.passthrough=1`` on arm64 system.
+
 Since DPDK release 1.7 onward provides VFIO support, use of UIO is optional
 for platforms that support using VFIO.