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From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
To: dev@dpdk.org
Cc: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>, stable@dpdk.org,
Boris Ouretskey <borisusun@gmail.com>, Isaac Boukris <iboukris@gmail.com>,
Bruce Richardson <bruce.richardson@intel.com>
Subject: [PATCH] doc: add capability to access physical addresses
Date: Sun, 15 Jan 2023 01:58:02 +0300
Message-Id: <20230114225802.136625-1-dmitry.kozliuk@gmail.com>
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CAP_DAC_OVERRIDE capability is required to access /proc/self/pagemap,
but it was missing from the Linux guide, causing issues for users.
Fixes: 979bb5d493fb ("doc: add more instructions for running as non-root")
Cc: stable@dpdk.org
Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Reported-by: Boris Ouretskey <borisusun@gmail.com>
Reported-by: Isaac Boukris <iboukris@gmail.com>
---
Mail threads:
* https://inbox.dpdk.org/users/CAG4AAQ21hn_Ogi0-gfUjXVhtWU19Bk634BT6Ue1bpYZjRXFJjg@mail.gmail.com
* https://inbox.dpdk.org/users/CAC-fF8ShK_n1dhPK2KwV7nRx7535simb=fN77yrZR1+fV2j28A@mail.gmail.com
doc/guides/linux_gsg/enable_func.rst | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/doc/guides/linux_gsg/enable_func.rst b/doc/guides/linux_gsg/enable_func.rst
index 829084d80e..b0e123cb7e 100644
--- a/doc/guides/linux_gsg/enable_func.rst
+++ b/doc/guides/linux_gsg/enable_func.rst
@@ -55,12 +55,12 @@ Refer to the `documentation <https://www.kernel.org/doc/Documentation/vm/hugetlb
If the driver requires using physical addresses (PA),
the executable file must be granted additional capabilities:
-* ``SYS_ADMIN`` to read ``/proc/self/pagemaps``
+* ``CAP_DAC_OVERRIDE`` and ``SYS_ADMIN`` to read ``/proc/self/pagemaps``
* ``IPC_LOCK`` to lock hugepages in memory
.. code-block:: console
- setcap cap_ipc_lock,cap_sys_admin+ep <executable>
+ setcap cap_dac_override,cap_ipc_lock,cap_sys_admin+ep <executable>
If physical addresses are not accessible,
the following message will appear during EAL initialization::
--
2.38.1