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Peter Anvin" , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Madhavan Srinivasan , Andi Kleen , Alexey Budankov , x86@kernel.org Subject: [RFC 4/4] perf Documentation: Document the per PMU perf_event_paranoid interface Date: Tue, 26 Jun 2018 16:36:42 +0100 Message-Id: <20180626153642.5587-5-tvrtko.ursulin@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180626153642.5587-1-tvrtko.ursulin@linux.intel.com> References: <20180626153642.5587-1-tvrtko.ursulin@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tvrtko Ursulin Explain behaviour of the new control knob along side the existing perf event documentation. Signed-off-by: Tvrtko Ursulin Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Namhyung Kim Cc: Madhavan Srinivasan Cc: Andi Kleen Cc: Alexey Budankov Cc: linux-kernel@vger.kernel.org Cc: x86@kernel.org --- .../testing/sysfs-bus-event_source-devices-events | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events index 505f080d20a1..b3096ae9be6f 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -92,3 +92,17 @@ Description: Perf event scaling factors This is provided to avoid performing floating point arithmetic in the kernel. + +What: /sys/bus/event_source/devices//perf_event_paranoid +Date: 2018/06/26 +Contact: Linux kernel mailing list +Description: Per PMU access control file + + This is the per PMU version of the perf_event_paranoid sysctl + which allows controlling the access control level for each + individual PMU. + + Writes to the sysctl will propagate to all PMU providers. + + For explanation of supported values please consult the sysctl + documentation. -- 2.17.1