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Thomas Gleixnerec8f24b2019-05-19 13:07:45 +01001# SPDX-License-Identifier: GPL-2.0-only
Alexander Shishkin7bd1d402015-09-22 15:47:10 +03002config STM
3 tristate "System Trace Module devices"
Alexander Shishkin1c090572015-10-16 17:09:12 +03004 select CONFIGFS_FS
Arnd Bergmann042d4462015-12-22 17:25:17 +02005 select SRCU
Alexander Shishkin7bd1d402015-09-22 15:47:10 +03006 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.
Alexander Shishkin2c415382015-09-22 15:47:12 +030012
Geert Uytterhoeven4a2e2b12015-12-22 17:25:15 +020013if STM
14
Alexander Shishkina02509f2018-10-05 15:42:56 +030015config 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
Alexander Shishkind69d5e82018-10-05 15:42:58 +030030config 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
Alexander Shishkin2c415382015-09-22 15:47:12 +030044config 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.
Alexander Shishkine3e5a3d2015-09-22 15:47:13 +030051
52config 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.
Geert Uytterhoeven4a2e2b12015-12-22 17:25:15 +020060
Alexander Shishkin11929182016-02-15 19:12:04 +020061config 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
Chunyan Zhang262e1f6e2016-11-21 15:57:19 +080072config STM_SOURCE_FTRACE
73 tristate "Copy the output from kernel Ftrace to STM engine"
Tingwei Zhang7b9749b2020-10-05 10:13:12 +030074 depends on TRACING
Chunyan Zhang262e1f6e2016-11-21 15:57:19 +080075 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
Geert Uytterhoeven4a2e2b12015-12-22 17:25:15 +020083endif