| # SPDX-License-Identifier: GPL-2.0-only |
| config STM |
| tristate "System Trace Module devices" |
| select CONFIGFS_FS |
| select SRCU |
| help |
| A System Trace Module (STM) is a device exporting data in System |
| Trace Protocol (STP) format as defined by MIPI STP standards. |
| Examples of such devices are Intel(R) Trace Hub and Coresight STM. |
| |
| Say Y here to enable System Trace Module device support. |
| |
| if STM |
| |
| config STM_PROTO_BASIC |
| tristate "Basic STM framing protocol driver" |
| default CONFIG_STM |
| help |
| This is a simple framing protocol for sending data over STM |
| devices. This was the protocol that the STM framework used |
| exclusively until the MIPI SyS-T support was added. Use this |
| driver for compatibility with your existing STM setup. |
| |
| The receiving side only needs to be able to decode the MIPI |
| STP protocol in order to extract the data. |
| |
| If you want to be able to use the basic protocol or want the |
| backwards compatibility for your existing setup, say Y. |
| |
| config STM_PROTO_SYS_T |
| tristate "MIPI SyS-T STM framing protocol driver" |
| default CONFIG_STM |
| help |
| This is an implementation of MIPI SyS-T protocol to be used |
| over the STP transport. In addition to the data payload, it |
| also carries additional metadata for time correlation, better |
| means of trace source identification, etc. |
| |
| The receiving side must be able to decode this protocol in |
| addition to the MIPI STP, in order to extract the data. |
| |
| If you don't know what this is, say N. |
| |
| config STM_DUMMY |
| tristate "Dummy STM driver" |
| help |
| This is a simple dummy device that pretends to be an stm device |
| and discards your data. Use for stm class testing. |
| |
| If you don't know what this is, say N. |
| |
| config STM_SOURCE_CONSOLE |
| tristate "Kernel console over STM devices" |
| help |
| This is a kernel space trace source that sends kernel log |
| messages to trace hosts over STM devices. |
| |
| If you want to send kernel console messages over STM devices, |
| say Y. |
| |
| config STM_SOURCE_HEARTBEAT |
| tristate "Heartbeat over STM devices" |
| help |
| This is a kernel space trace source that sends periodic |
| heartbeat messages to trace hosts over STM devices. It is |
| also useful for testing stm class drivers and the stm class |
| framework itself. |
| |
| 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 |
