diff options
| author | Mike Leach <mike.leach@linaro.org> | 2023-01-16 12:49:19 +0000 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2023-01-19 10:16:47 +0000 |
| commit | 9edf291091f68f4767cb9d65fa825b64021277bd (patch) | |
| tree | 6a47b40e27633c3f822dd0b24d54e9b77c7b95c0 /Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x | |
| parent | df4871204e5de97e47959f826e9cd2e76b41f969 (diff) | |
coresight: etm3x: Update ETM3 driver to use Trace ID API
Use the TraceID API to allocate ETM trace IDs dynamically.
As with the etm4x we allocate on enable / disable for perf,
allocate on enable / reset for sysfs.
Additionally we allocate on sysfs file read as both perf and sysfs
can read the ID before enabling the hardware.
Remove sysfs option to write trace ID - which is inconsistent with
both the dynamic allocation method and the fixed allocation method
previously used.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230116124928.5440-7-mike.leach@linaro.org
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x index 651602a61eac..234c33fbdb55 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x @@ -236,7 +236,7 @@ What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/traceid Date: November 2014 KernelVersion: 3.19 Contact: Mathieu Poirier <mathieu.poirier@linaro.org> -Description: (RW) Holds the trace ID that will appear in the trace stream +Description: (RO) Holds the trace ID that will appear in the trace stream coming from this trace entity. What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/trigger_event |