X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Fnics%2Fixgbe.rst;h=1f424b38ac3de2be98253b4b85f30f106bac810e;hb=829c3106812dee9e54d6dc060688e37f791a2421;hp=975143f8bab752e10b173bae2967e0ac8b4c715b;hpb=d629b7b5fe812f0040b83d27d2ada33b003aa918;p=dpdk.git

diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst
index 975143f8ba..1f424b38ac 100644
--- a/doc/guides/nics/ixgbe.rst
+++ b/doc/guides/nics/ixgbe.rst
@@ -15,7 +15,6 @@ There is no change to PMD API. The RX/TX handler are the only two entries for vP
 They are transparently registered at runtime RX/TX execution if all condition checks pass.
 
 1.  To date, only an SSE version of IX GBE vPMD is available.
-    To ensure that vPMD is in the binary code, ensure that the option CONFIG_RTE_IXGBE_INC_VECTOR=y is in the configure file.
 
 Some constraints apply as pre-conditions for specific optimizations on bulk packet transfers.
 The following sections explain RX and TX constraints in the vPMD.
@@ -82,6 +81,31 @@ 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**)
+
+  When calling ``rte_eth_link_get_nowait()`` to get VF link status,
+  this option is used to control how VF synchronizes its status with
+  PF's. If set, VF will not only check the PF's physical link status
+  by reading related register, but also check the mailbox status. We
+  call this behavior as fully checking. And checking mailbox will
+  trigger PF's mailbox interrupt generation. If unset, the application
+  can get the VF's link status quickly by just reading the PF's link
+  status register, this will avoid the whole system's mailbox interrupt
+  generation.
+
+  ``rte_eth_link_get()`` will still use the mailbox method regardless
+  of the pflink_fullchk setting.
+
 RX Burst Size
 ^^^^^^^^^^^^^