diff options
| author | Chunyan Zhang <zhang.chunyan@linaro.org> | 2016-11-21 08:57:19 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-11-22 23:47:48 +0100 |
| commit | 262e1f6e39143c2a0f559e2fb4a835069a7693a9 (patch) | |
| tree | 933c82966d0aa045689eb1f9e0005b0fc6a9ac7c /drivers/hwtracing/stm/Kconfig | |
| parent | tracing: Add hook to function tracing for other subsystems to use (diff) | |
| download | linux-262e1f6e39143c2a0f559e2fb4a835069a7693a9.tar.xz linux-262e1f6e39143c2a0f559e2fb4a835069a7693a9.zip | |
stm class: ftrace: Add ftrace-export-over-stm driver
This patch adds a driver that models itself as an stm_source called
stm_ftrace. Once the stm device and stm_ftrace have been linked via
sysfs, the driver registers itself as a trace_export and everything
passed to the interface from Ftrace subsystem will end up in the STM
trace engine.
Link: http://lkml.kernel.org/r/1479715043-6534-3-git-send-email-zhang.chunyan@linaro.org
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'drivers/hwtracing/stm/Kconfig')
| -rw-r--r-- | drivers/hwtracing/stm/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/hwtracing/stm/Kconfig b/drivers/hwtracing/stm/Kconfig index 847a39b35307..723e2d90083d 100644 --- a/drivers/hwtracing/stm/Kconfig +++ b/drivers/hwtracing/stm/Kconfig @@ -39,4 +39,15 @@ config STM_SOURCE_HEARTBEAT If you want to send heartbeat messages over STM devices, say Y. +config STM_SOURCE_FTRACE + tristate "Copy the output from kernel Ftrace to STM engine" + depends on FUNCTION_TRACER + help + This option can be used to copy the output from kernel Ftrace + to STM engine. Enabling this option will introduce a slight + timing effect. + + If you want to send kernel Ftrace messages over STM devices, + say Y. + endif |