[dpdk-dev] [PATCH] doc: update i40e guide

[Beilei Xing <beilei.xing@intel.com>]

This patch updates the i40e guide with new device
parameter support-multi-driver.

Signed-off-by: Beilei Xing <beilei.xing@intel.com>
Cc: stable@dpdk.org
---
 doc/guides/nics/i40e.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/doc/guides/nics/i40e.rst b/doc/guides/nics/i40e.rst
index 166f447..a83af6d 100644
--- a/doc/guides/nics/i40e.rst
+++ b/doc/guides/nics/i40e.rst
@@ -136,6 +136,17 @@ Runtime Config Options
   1, 2, 4, 8 or 16. If no such parameter is configured, the number of queues
   per VF is 4 by default.
 
+- ``Support multiple driver`` (default ``disable``)
+
+  There was a multiple driver support issue during use of 700 series Ethernet
+  Adapter with both Linux kernel and DPDK PMD. To fix this issue, ``devargs``
+  parameter ``support-multi-driver`` is introduced, for example::
+
+    -w 84:00.0,support-multi-driver=1
+
+  With the above configuration, DPDK PMD will not change global registers, and
+  will switch PF interrupt from IntN to Int0 to avoid interrupt conflict between
+  DPDK and Linux Kernel.
 
 Driver compilation and testing
 ------------------------------
-- 
2.5.5