diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-09-20 22:17:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-25 21:09:18 +0300 |
| commit | 22f429f19c4135d51e9dcaf360c0920e32aac7f9 (patch) | |
| tree | 4bb516c8eac07d97de19fd1825f2c2c16689ba2c /drivers/hwtracing/coresight/coresight-tmc.h | |
| parent | 3d6e8935758392179645e1b105789b3da329ad38 (diff) | |
| download | linux-22f429f19c4135d51e9dcaf360c0920e32aac7f9.tar.xz | |
coresight: etm-perf: Add support for ETR backend
Add support for using TMC-ETR as backend for ETM perf tracing.
We use software double buffering at the moment. i.e, the TMC-ETR
uses a separate buffer than the perf ring buffer. The data is
copied to the perf ring buffer once a session completes.
The TMC-ETR would try to match the larger of perf ring buffer
or the ETR buffer size configured via sysfs, scaling down to
a minimum limit of 1MB.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-tmc.h')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h index 872f63e3651b..487c53701e9c 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.h +++ b/drivers/hwtracing/coresight/coresight-tmc.h @@ -170,6 +170,7 @@ struct etr_buf { * @trigger_cntr: amount of words to store after a trigger. * @etr_caps: Bitmask of capabilities of the TMC ETR, inferred from the * device configuration register (DEVID) + * @perf_data: PERF buffer for ETR. * @sysfs_data: SYSFS buffer for ETR. */ struct tmc_drvdata { @@ -191,6 +192,7 @@ struct tmc_drvdata { u32 trigger_cntr; u32 etr_caps; struct etr_buf *sysfs_buf; + void *perf_data; }; struct etr_buf_operations { |