diff mbox series

[V3,3/3] Documentation: coresight: Add cc_threshold tunable

Message ID 20230811034600.944386-4-anshuman.khandual@arm.com
State New
Headers
Series coresight: etm: Make cycle count threshold user configurable |

Commit Message

Anshuman Khandual Aug. 11, 2023, 3:46 a.m. UTC 
  This updates config option to include 'cc_threshold' tunable value.

Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: James Clark <james.clark@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 Documentation/trace/coresight/coresight.rst | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Mike Leach Aug. 11, 2023, 9:05 a.m. UTC | #1 
On Fri, 11 Aug 2023 at 04:46, Anshuman Khandual
<anshuman.khandual@arm.com> wrote:
>
> This updates config option to include 'cc_threshold' tunable value.
>
> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
> Cc: Mike Leach <mike.leach@linaro.org>
> Cc: James Clark <james.clark@arm.com>
> Cc: Jonathan Corbet <corbet@lwn.net>
> Cc: coresight@lists.linaro.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-doc@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> ---
>  Documentation/trace/coresight/coresight.rst | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/trace/coresight/coresight.rst b/Documentation/trace/coresight/coresight.rst
> index 4a71ea6cb390..ce55adb80b82 100644
> --- a/Documentation/trace/coresight/coresight.rst
> +++ b/Documentation/trace/coresight/coresight.rst
> @@ -624,6 +624,10 @@ They are also listed in the folder /sys/bus/event_source/devices/cs_etm/format/
>     * - timestamp
>       - Session local version of the system wide setting: :ref:`ETMv4_MODE_TIMESTAMP
>         <coresight-timestamp>`
> +   * - cc_threshold
> +     - Cycle count threshold value. If nothing is provided here or the provided value is 0, then the
> +       default value i.e 0x100 will be used. If provided value is less than minimum cycles threshold
> +       value, as indicated via TRCIDR3.CCITMIN, then the minimum value will be used instead.
>
>  How to use the STM module
>  -------------------------
> --
> 2.25.1
>
Reviewed by: Mike Leach <mike.leach@linaro.org>
diff mbox series

Patch

diff --git a/Documentation/trace/coresight/coresight.rst b/Documentation/trace/coresight/coresight.rst
index 4a71ea6cb390..ce55adb80b82 100644
--- a/Documentation/trace/coresight/coresight.rst
+++ b/Documentation/trace/coresight/coresight.rst
@@ -624,6 +624,10 @@  They are also listed in the folder /sys/bus/event_source/devices/cs_etm/format/
    * - timestamp
      - Session local version of the system wide setting: :ref:`ETMv4_MODE_TIMESTAMP
        <coresight-timestamp>`
+   * - cc_threshold
+     - Cycle count threshold value. If nothing is provided here or the provided value is 0, then the
+       default value i.e 0x100 will be used. If provided value is less than minimum cycles threshold
+       value, as indicated via TRCIDR3.CCITMIN, then the minimum value will be used instead.
 
 How to use the STM module
 -------------------------