[dpdk-stable] [PATCH] doc: add Linux rawio capability requirement in mlx5 guide

[Eli Britstein <elibr@nvidia.com>]

For an application to be able to create "transfer" rte_flows for mlx5
devices, it should have cap_sys_rawio capability.
Document it.

Fixes: f772cc424c45 ("doc: add required Linux capabilities in mlx5 guide")
Cc: stable@dpdk.org

Signed-off-by: Eli Britstein <elibr@nvidia.com>
Reviewed-by: Gaetan Rivet <gaetanr@nvidia.com>
---
 doc/guides/nics/mlx5.rst | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index 7c50497fbc..7ef682a8fb 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -458,16 +458,14 @@ Run as non-root
 ^^^^^^^^^^^^^^^
 
 In order to run as a non-root user,
-some capabilities must be granted to the application::
+some capabilities must be granted to the application, while others are
+optional for some use cases. Capabilities can be set for example using
+the setcap utilitiy::
 
-   setcap cap_sys_admin,cap_net_admin,cap_net_raw,cap_ipc_lock+ep <dpdk-app>
+   setcap cap_net_admin,cap_net_raw,cap_ipc_lock,cap_sys_admin,cap_sys_rawio+ep <dpdk-app>
 
 Below are the reasons of the need for each capability:
 
-``cap_sys_admin``
-   When using physical addresses (PA mode), with Linux >= 4.0,
-   for access to ``/proc/self/pagemap``.
-
 ``cap_net_admin``
    For device configuration.
 
@@ -477,6 +475,14 @@ Below are the reasons of the need for each capability:
 ``cap_ipc_lock``
    For DMA memory pinning.
 
+``cap_sys_admin`` optional
+   When using physical addresses (PA mode), with Linux >= 4.0,
+   for access to ``/proc/self/pagemap``.
+
+``cap_sys_rawio`` optional
+   For the application to be able to apply rte_flow flows in transfer
+   mode.
+
 Driver options
 ^^^^^^^^^^^^^^
 
-- 
2.28.0.2311.g225365fb51