[dpdk-dev] [PATCH 2/2] doc: add the description for option pflink_fullchk in ixgbevf

[Haiyue Wang <haiyue.wang@intel.com>]

Add the detail description for this pflink_fullchk option, when it will
be used, and it is used for fixing what kind of issue.

Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
---
 doc/guides/nics/ixgbe.rst | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst
index 975143f..33812a5 100644
--- a/doc/guides/nics/ixgbe.rst
+++ b/doc/guides/nics/ixgbe.rst
@@ -82,6 +82,24 @@ To guarantee the constraint, capabilities in dev_conf.rxmode.offloads will be ch
 
 fdir_conf->mode will also be checked.
 
+VF Runtime Options
+^^^^^^^^^^^^^^^^^^
+
+The following ``devargs`` options can be enabled at runtime. They must
+be passed as part of EAL arguments. For example,
+
+.. code-block:: console
+
+   testpmd -w af:10.0,pflink_fullchk=1 -- -i
+
+- ``pflink_fullchk`` (default **0**)
+
+  Toggle behavior to get ixgbevf link status quickly by checking the
+  mailbox status or not. If set, the VF will check the PF's link status
+  and the PF's mailbox running status, which will trigger PF's mailbox
+  interrupt generation. Otherwise, just check PF's link status, then no
+  mailbox interrupt in PF.
+
 RX Burst Size
 ^^^^^^^^^^^^^
 
-- 
2.7.4