drivers/hwtracing/stm/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 config STM
   3         tristate "System Trace Module devices"
   4         select CONFIGFS_FS
   5         select SRCU
   6         help
   7           A System Trace Module (STM) is a device exporting data in System
   8           Trace Protocol (STP) format as defined by MIPI STP standards.
   9           Examples of such devices are Intel(R) Trace Hub and Coresight STM.
  10
  11           Say Y here to enable System Trace Module device support.
  12
  13 if STM
  14
  15 config STM_PROTO_BASIC
  16         tristate "Basic STM framing protocol driver"
  17         default CONFIG_STM
  18         help
  19           This is a simple framing protocol for sending data over STM
  20           devices. This was the protocol that the STM framework used
  21           exclusively until the MIPI SyS-T support was added. Use this
  22           driver for compatibility with your existing STM setup.
  23
  24           The receiving side only needs to be able to decode the MIPI
  25           STP protocol in order to extract the data.
  26
  27           If you want to be able to use the basic protocol or want the
  28           backwards compatibility for your existing setup, say Y.
  29
  30 config STM_PROTO_SYS_T
  31         tristate "MIPI SyS-T STM framing protocol driver"
  32         default CONFIG_STM
  33         help
  34           This is an implementation of MIPI SyS-T protocol to be used
  35           over the STP transport. In addition to the data payload, it
  36           also carries additional metadata for time correlation, better
  37           means of trace source identification, etc.
  38
  39           The receiving side must be able to decode this protocol in
  40           addition to the MIPI STP, in order to extract the data.
  41
  42           If you don't know what this is, say N.
  43
  44 config STM_DUMMY
  45         tristate "Dummy STM driver"
  46         help
  47           This is a simple dummy device that pretends to be an stm device
  48           and discards your data. Use for stm class testing.
  49
  50           If you don't know what this is, say N.
  51
  52 config STM_SOURCE_CONSOLE
  53         tristate "Kernel console over STM devices"
  54         help
  55           This is a kernel space trace source that sends kernel log
  56           messages to trace hosts over STM devices.
  57
  58           If you want to send kernel console messages over STM devices,
  59           say Y.
  60
  61 config STM_SOURCE_HEARTBEAT
  62         tristate "Heartbeat over STM devices"
  63         help
  64           This is a kernel space trace source that sends periodic
  65           heartbeat messages to trace hosts over STM devices. It is
  66           also useful for testing stm class drivers and the stm class
  67           framework itself.
  68
  69           If you want to send heartbeat messages over STM devices,
  70           say Y.
  71
  72 config STM_SOURCE_FTRACE
  73         tristate "Copy the output from kernel Ftrace to STM engine"
  74         depends on FUNCTION_TRACER
  75         help
  76           This option can be used to copy the output from kernel Ftrace
  77           to STM engine. Enabling this option will introduce a slight
  78           timing effect.
  79
  80           If you want to send kernel Ftrace messages over STM devices,
  81           say Y.
  82
  83 endif