forked from Minki/linux
b27a6a3f97
Global Trace Hub (GTH) is the central component of Intel TH architecture; it carries out switching between the trace sources and trace outputs, can enable/disable tracing, perform STP encoding, internal buffering, control backpressure from outputs to sources and so on. This property is also reflected in the software model; GTH (switch) driver is required for the other subdevices to probe, because it matches trace output devices against its output ports and configures them accordingly. It also implements an interface for output ports to request trace enabling or disabling and a few other useful things. For userspace, it provides an attribute group "masters", which allows configuration of per-master trace output destinations for up to master 255 and "256+" meaning "masters 256 and above". It also provides an attribute group to discover and configure some of the parameters of its output ports, called "outputs". Via these the user can set up data retention policy for an individual output port or check if it is in reset state. Signed-off-by: Laurent Fert <laurent.fert@intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
config INTEL_TH
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tristate "Intel(R) Trace Hub controller"
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help
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Intel(R) Trace Hub (TH) is a set of hardware blocks (subdevices) that
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produce, switch and output trace data from multiple hardware and
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software sources over several types of trace output ports encoded
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in System Trace Protocol (MIPI STPv2) and is intended to perform
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full system debugging.
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This option enables intel_th bus and common code used by TH
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subdevices to interact with each other and hardware and for
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platform glue layers to drive Intel TH devices.
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Say Y here to enable Intel(R) Trace Hub controller support.
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if INTEL_TH
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config INTEL_TH_PCI
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tristate "Intel(R) Trace Hub PCI controller"
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depends on PCI
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help
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Intel(R) Trace Hub may exist as a PCI device. This option enables
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support glue layer for PCI-based Intel TH.
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Say Y here to enable PCI Intel TH support.
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config INTEL_TH_GTH
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tristate "Intel(R) Trace Hub Global Trace Hub"
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help
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Global Trace Hub (GTH) is the central component of the
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Intel TH infrastructure and acts as a switch for source
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and output devices. This driver is required for other
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Intel TH subdevices to initialize.
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Say Y here to enable GTH subdevice of Intel(R) Trace Hub.
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config INTEL_TH_DEBUG
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bool "Intel(R) Trace Hub debugging"
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depends on DEBUG_FS
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help
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Say Y here to enable debugging.
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endif
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