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Coresight hardware is only likely to appear on Arm systems and currently the core code has Arm-specific barrier operations in it so can't be built anywhere else so add an explicit dependency saying so. This will make no practical difference currently due to the way subsystems are referenced, the subsystem is only pulled in on arm and arm64, so mainly serves as documentation in case someone wants to increase build coverage. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20191104181251.26732-13-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
114 lines
4.5 KiB
Plaintext
114 lines
4.5 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Coresight configuration
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#
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menuconfig CORESIGHT
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bool "CoreSight Tracing Support"
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depends on ARM || ARM64
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depends on OF || ACPI
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select ARM_AMBA
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select PERF_EVENTS
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help
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This framework provides a kernel interface for the CoreSight debug
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and trace drivers to register themselves with. It's intended to build
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a topological view of the CoreSight components based on a DT
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specification and configure the right series of components when a
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trace source gets enabled.
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if CORESIGHT
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config CORESIGHT_LINKS_AND_SINKS
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bool "CoreSight Link and Sink drivers"
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help
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This enables support for CoreSight link and sink drivers that are
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responsible for transporting and collecting the trace data
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respectively. Link and sinks are dynamically aggregated with a trace
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entity at run time to form a complete trace path.
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config CORESIGHT_LINK_AND_SINK_TMC
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bool "Coresight generic TMC driver"
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depends on CORESIGHT_LINKS_AND_SINKS
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help
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This enables support for the Trace Memory Controller driver.
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Depending on its configuration the device can act as a link (embedded
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trace router - ETR) or sink (embedded trace FIFO). The driver
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complies with the generic implementation of the component without
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special enhancement or added features.
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config CORESIGHT_CATU
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bool "Coresight Address Translation Unit (CATU) driver"
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depends on CORESIGHT_LINK_AND_SINK_TMC
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help
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Enable support for the Coresight Address Translation Unit (CATU).
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CATU supports a scatter gather table of 4K pages, with forward/backward
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lookup. CATU helps TMC ETR to use a large physically non-contiguous trace
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buffer by translating the addresses used by ETR to the physical address
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by looking up the provided table. CATU can also be used in pass-through
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mode where the address is not translated.
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config CORESIGHT_SINK_TPIU
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bool "Coresight generic TPIU driver"
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depends on CORESIGHT_LINKS_AND_SINKS
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help
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This enables support for the Trace Port Interface Unit driver,
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responsible for bridging the gap between the on-chip coresight
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components and a trace for bridging the gap between the on-chip
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coresight components and a trace port collection engine, typically
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connected to an external host for use case capturing more traces than
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the on-board coresight memory can handle.
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config CORESIGHT_SINK_ETBV10
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bool "Coresight ETBv1.0 driver"
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depends on CORESIGHT_LINKS_AND_SINKS
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help
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This enables support for the Embedded Trace Buffer version 1.0 driver
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that complies with the generic implementation of the component without
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special enhancement or added features.
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config CORESIGHT_SOURCE_ETM3X
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bool "CoreSight Embedded Trace Macrocell 3.x driver"
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depends on !ARM64
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select CORESIGHT_LINKS_AND_SINKS
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help
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This driver provides support for processor ETM3.x and PTM1.x modules,
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which allows tracing the instructions that a processor is executing
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This is primarily useful for instruction level tracing. Depending
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the ETM version data tracing may also be available.
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config CORESIGHT_SOURCE_ETM4X
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bool "CoreSight Embedded Trace Macrocell 4.x driver"
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depends on ARM64
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select CORESIGHT_LINKS_AND_SINKS
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select PID_IN_CONTEXTIDR
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help
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This driver provides support for the ETM4.x tracer module, tracing the
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instructions that a processor is executing. This is primarily useful
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for instruction level tracing. Depending on the implemented version
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data tracing may also be available.
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config CORESIGHT_STM
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bool "CoreSight System Trace Macrocell driver"
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depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
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select CORESIGHT_LINKS_AND_SINKS
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select STM
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help
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This driver provides support for hardware assisted software
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instrumentation based tracing. This is primarily used for
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logging useful software events or data coming from various entities
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in the system, possibly running different OSs
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config CORESIGHT_CPU_DEBUG
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tristate "CoreSight CPU Debug driver"
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depends on ARM || ARM64
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depends on DEBUG_FS
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help
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This driver provides support for coresight debugging module. This
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is primarily used to dump sample-based profiling registers when
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system triggers panic, the driver will parse context registers so
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can quickly get to know program counter (PC), secure state,
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exception level, etc. Before use debugging functionality, platform
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needs to ensure the clock domain and power domain are enabled
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properly, please refer Documentation/trace/coresight-cpu-debug.rst
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for detailed description and the example for usage.
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endif
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