| Message ID | 20220429123100.268059-3-german.gomez@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | coresight: etm4x: Expose default timestamp source in sysfs | expand |
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. Check > + trcidr0.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 >
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 +Contact: Mathieu Poirier <mathieu.poirier@linaro.org> +Description: (Read) 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. 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:
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(+)