All of lore.kernel.org
 help / color / mirror / Atom feed
From: German Gomez <german.gomez@arm.com>
To: coresight@lists.linaro.org, mathieu.poirier@linaro.org,
	suzuki.poulose@arm.com
Cc: james.clark@arm.com, leo.yan@linaro.org, mike.leach@linaro.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, German Gomez <german.gomez@arm.com>
Subject: [PATCH 2/2] coresight: etm4x: docs: Add documentation for 'ts_source' sysfs interface
Date: Fri, 29 Apr 2022 13:31:00 +0100	[thread overview]
Message-ID: <20220429123100.268059-3-german.gomez@arm.com> (raw)
In-Reply-To: <20220429123100.268059-1-german.gomez@arm.com>

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
+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:
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: German Gomez <german.gomez@arm.com>
To: coresight@lists.linaro.org, mathieu.poirier@linaro.org,
	suzuki.poulose@arm.com
Cc: james.clark@arm.com, leo.yan@linaro.org, mike.leach@linaro.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, German Gomez <german.gomez@arm.com>
Subject: [PATCH 2/2] coresight: etm4x: docs: Add documentation for 'ts_source' sysfs interface
Date: Fri, 29 Apr 2022 13:31:00 +0100	[thread overview]
Message-ID: <20220429123100.268059-3-german.gomez@arm.com> (raw)
In-Reply-To: <20220429123100.268059-1-german.gomez@arm.com>

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
+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:
-- 
2.25.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2022-04-29 12:31 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-29 12:30 [PATCH 0/2] coresight: etm4x: Expose default timestamp source in sysfs German Gomez
2022-04-29 12:30 ` German Gomez
2022-04-29 12:30 ` [PATCH 1/2] " German Gomez
2022-04-29 12:30   ` German Gomez
2022-04-29 16:28   ` Leo Yan
2022-04-29 16:28     ` Leo Yan
2022-05-02 16:49   ` Mathieu Poirier
2022-05-02 16:49     ` Mathieu Poirier
2022-04-29 12:31 ` German Gomez [this message]
2022-04-29 12:31   ` [PATCH 2/2] coresight: etm4x: docs: Add documentation for 'ts_source' sysfs interface German Gomez
2022-05-02 16:45   ` Mathieu Poirier
2022-05-02 16:45     ` Mathieu Poirier

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20220429123100.268059-3-german.gomez@arm.com \
    --to=german.gomez@arm.com \
    --cc=coresight@lists.linaro.org \
    --cc=james.clark@arm.com \
    --cc=leo.yan@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mathieu.poirier@linaro.org \
    --cc=mike.leach@linaro.org \
    --cc=suzuki.poulose@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.