| # 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 TRACING | |
| 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 |