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745cfc5651
When neither CONFIG_OF nor CONFIG_ACPI are set, we get a harmless
build warning:
drivers/hwtracing/coresight/coresight-platform.c:26:12: error: unused function 'coresight_alloc_conns'
[-Werror,-Wunused-function]
static int coresight_alloc_conns(struct device *dev,
^
drivers/hwtracing/coresight/coresight-platform.c:46:1: error: unused function 'coresight_find_device_by_fwnode'
[-Werror,-Wunused-function]
coresight_find_device_by_fwnode(struct fwnode_handle *fwnode)
As the code is useless in that configuration anyway, just add
a Kconfig dependency that only allows building when at least
one of the two is set.
This should not hinder compile-testing, as CONFIG_OF can be
enabled on any architecture.
Fixes: 20961aea98 ("coresight: platform: Use fwnode handle for device search")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
113 lines
4.4 KiB
Plaintext
113 lines
4.4 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 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.txt
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for detailed description and the example for usage.
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endif
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