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From:   Haiyang Zhang <haiyangz@microsoft.com>
To:     "sashal@kernel.org" <sashal@kernel.org>,
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Subject: [PATCH net-next, 4/4] hv_netvsc: Update document for XDP support
Thread-Topic: [PATCH net-next, 4/4] hv_netvsc: Update document for XDP support
Thread-Index: AQHVjdOqeF2skKD6Y0io1FAqZWRRAw==
Date:   Mon, 28 Oct 2019 21:07:11 +0000
Message-ID: <1572296801-4789-5-git-send-email-haiyangz@microsoft.com>
References: <1572296801-4789-1-git-send-email-haiyangz@microsoft.com>
In-Reply-To: <1572296801-4789-1-git-send-email-haiyangz@microsoft.com>
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Added the new section in the document regarding XDP support
by hv_netvsc driver.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
 .../networking/device_drivers/microsoft/netvsc.txt         | 14 ++++++++++=
++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/networking/device_drivers/microsoft/netvsc.txt b=
/Documentation/networking/device_drivers/microsoft/netvsc.txt
index 3bfa635..69ccfca 100644
--- a/Documentation/networking/device_drivers/microsoft/netvsc.txt
+++ b/Documentation/networking/device_drivers/microsoft/netvsc.txt
@@ -82,3 +82,17 @@ Features
   contain one or more packets. The send buffer is an optimization, the dri=
ver
   will use slower method to handle very large packets or if the send buffe=
r
   area is exhausted.
+
+  XDP support
+  -----------
+  XDP (eXpress Data Path) is a feature that runs eBPF bytecode at the earl=
y
+  stage when packets arrive at a NIC card. The goal is to increase perform=
ance
+  for packet processing, reducing the overhead of SKB allocation and other
+  upper network layers.
+
+  hv_netvsc supports XDP in native mode, and transparently sets the XDP
+  program on the associated VF NIC as well.
+
+  XDP program cannot run with LRO (RSC) enabled, so you need to disable LR=
O
+  before running XDP:
+	ethtool -K eth0 lro off
--=20
1.8.3.1