On Fri, Apr 29, 2022 at 01:31:00PM +0100, German Gomez wrote:
Sync sysfs documentation pages to include the new ts_source (timestamp source) interface.
Signed-off-by: German Gomez german.gomez@arm.com
.../ABI/testing/sysfs-bus-coresight-devices-etm4x | 8 ++++++++ .../trace/coresight/coresight-etm4x-reference.rst | 14 ++++++++++++++ 2 files changed, 22 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index 8e53a32f81505..19ac9d6d2f504 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -516,3 +516,11 @@ Contact: Mathieu Poirier mathieu.poirier@linaro.org Description: (Read) Returns the number of special conditional P1 right-hand keys that the trace unit can use (0x194). The value is taken directly from the HW.
+What: /sys/bus/coresight/devices/etm<N>/ts_source +Date: April 2022 +KernelVersion: 5.18
This would be 5.19 and a (likely) date of July 2022.
+Contact: Mathieu Poirier mathieu.poirier@linaro.org
Suzuki's name should also be added.
Thanks, Mathieu
+Description: (Read) When FEAT_TRF is implemented, value of TRFCR_ELx.TS used for
trace session. Otherwise -1 indicates an unknown time source. Checktrcidr0.tssize to see if a global timestamp is available.diff --git a/Documentation/trace/coresight/coresight-etm4x-reference.rst b/Documentation/trace/coresight/coresight-etm4x-reference.rst index d25dfe86af9bf..f016c7c29429b 100644 --- a/Documentation/trace/coresight/coresight-etm4x-reference.rst +++ b/Documentation/trace/coresight/coresight-etm4x-reference.rst @@ -71,6 +71,20 @@ the ‘TRC’ prefix.
+:File: ``ts_source`` (ro) +:Trace Registers: None. +:Notes:
- When FEAT_TRF is implemented, value of TRFCR_ELx.TS used for trace session. Otherwise -1
- indicates an unknown time source. Check trcidr0.tssize to see if a global timestamp is
- available.
+:Example:
- ``$> cat ts_source``
- ``$> 1``
+----
:File: ``addr_idx`` (rw) :Trace Registers: None. :Notes: -- 2.25.1