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![Alexander Shishkin](/assets/img/avatar_default.png)
This adds support for MIPI SyS-T protocol as specified in an open standard [1]. In addition to marking message boundaries, it also supports tagging messages with the source UUID, to provide better distinction between trace sources, including payload length and timestamp in the message's metadata. This driver adds attributes to STP policy nodes to control/configure these metadata features. [1] https://www.mipi.org/specifications/sys-t Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
82 lines
2.6 KiB
Text
82 lines
2.6 KiB
Text
config STM
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tristate "System Trace Module devices"
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select CONFIGFS_FS
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select SRCU
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help
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A System Trace Module (STM) is a device exporting data in System
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Trace Protocol (STP) format as defined by MIPI STP standards.
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Examples of such devices are Intel(R) Trace Hub and Coresight STM.
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Say Y here to enable System Trace Module device support.
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if STM
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config STM_PROTO_BASIC
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tristate "Basic STM framing protocol driver"
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default CONFIG_STM
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help
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This is a simple framing protocol for sending data over STM
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devices. This was the protocol that the STM framework used
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exclusively until the MIPI SyS-T support was added. Use this
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driver for compatibility with your existing STM setup.
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The receiving side only needs to be able to decode the MIPI
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STP protocol in order to extract the data.
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If you want to be able to use the basic protocol or want the
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backwards compatibility for your existing setup, say Y.
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config STM_PROTO_SYS_T
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tristate "MIPI SyS-T STM framing protocol driver"
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default CONFIG_STM
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help
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This is an implementation of MIPI SyS-T protocol to be used
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over the STP transport. In addition to the data payload, it
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also carries additional metadata for time correlation, better
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means of trace source identification, etc.
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The receiving side must be able to decode this protocol in
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addition to the MIPI STP, in order to extract the data.
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If you don't know what this is, say N.
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config STM_DUMMY
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tristate "Dummy STM driver"
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help
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This is a simple dummy device that pretends to be an stm device
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and discards your data. Use for stm class testing.
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If you don't know what this is, say N.
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config STM_SOURCE_CONSOLE
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tristate "Kernel console over STM devices"
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help
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This is a kernel space trace source that sends kernel log
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messages to trace hosts over STM devices.
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If you want to send kernel console messages over STM devices,
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say Y.
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config STM_SOURCE_HEARTBEAT
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tristate "Heartbeat over STM devices"
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help
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This is a kernel space trace source that sends periodic
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heartbeat messages to trace hosts over STM devices. It is
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also useful for testing stm class drivers and the stm class
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framework itself.
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If you want to send heartbeat messages over STM devices,
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say Y.
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config STM_SOURCE_FTRACE
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tristate "Copy the output from kernel Ftrace to STM engine"
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depends on FUNCTION_TRACER
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help
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This option can be used to copy the output from kernel Ftrace
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to STM engine. Enabling this option will introduce a slight
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timing effect.
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If you want to send kernel Ftrace messages over STM devices,
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say Y.
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endif
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