talos-op-linux/drivers/hwtracing/intel_th/Kconfig, branch master

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

intel_th: Add ACPI glue layer

2018-03-28T15:47:23+00:00

The Trace Hub devices now can be enumerated as ACPI devices, which translates into "Host Debugger mode". There are two IDs: one for PCH Trace Hub, and one for the uncore Trace Hub. These are expected to stay the same across all platforms. Signed-off-by: Alexander Shishkin

intel_th: Depend on HAS_IOMEM

2016-02-20T22:09:14+00:00

This driver requires io memory to operate, so don't even consider it for NO_IOMEM architectures. Reported-by: Richard Weinberger Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman

intel_th: INTEL_TH should depend on HAS_DMA

2016-02-08T06:43:17+00:00

If NO_DMA=y: ERROR: "dma_free_coherent" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined! ERROR: "dma_alloc_coherent" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined! ERROR: "dma_supported" [drivers/hwtracing/intel_th/intel_th.ko] undefined! Add a dependency on HAS_DMA to fix this. Signed-off-by: Geert Uytterhoeven Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman

intel_th: Add PTI output driver

2015-10-04T19:28:58+00:00

Parallel Trace Interface (PTI) unit is a trace output device that sends data over a PTI port. The driver provides interfaces to configure bus width, bus clock divider and mode. Tracing is enabled via output device's "active" attribute. Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman

intel_th: Add Memory Storage Unit driver

2015-10-04T19:28:58+00:00

Memory Storage Unit (MSU) is a trace output device that collects trace data to system memory. It consists of 2 independent Memory Storage Controllers (MSCs). This driver provides userspace interfaces to configure in-memory tracing parameters, such as contiguous (high-order allocation) buffer or multiblock (scatter list) buffer mode, wrapping (data overwrite) and number and sizes of windows in multiblock mode. Userspace can read the buffers via mmap()ing or read()ing of the corresponding device node. Signed-off-by: Laurent Fert Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman

intel_th: Add Software Trace Hub driver

2015-10-04T19:28:58+00:00

Software Trace Hub (STH) is a trace source device in the Intel TH architecture, it generates data that then goes through the switch into one or several output ports. STH collects data from software sources using the stm device class abstraction. Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman

intel_th: Add Global Trace Hub driver

2015-10-04T19:28:58+00:00

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 Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman

intel_th: Add pci glue layer for Intel(R) Trace Hub

2015-10-04T19:28:58+00:00

This patch adds basic support for PCI-based Intel TH devices. It requests 2 bars (configuration registers for the subdevices and STH channel MMIO region) and calls into Intel TH core code to create the bus with subdevices etc. Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman

intel_th: Add driver infrastructure for Intel(R) Trace Hub devices

2015-10-04T19:28:58+00:00

Intel(R) Trace Hub (TH) is a set of hardware blocks (subdevices) that produce, switch and output trace data from multiple hardware and software sources over several types of trace output ports encoded in System Trace Protocol (MIPI STPv2) and is intended to perform full system debugging. For these subdevices, we create a bus, where they can be discovered and configured by userspace software. This patch creates this bus infrastructure, three types of devices (source, output, switch), resource allocation, some callback mechanisms to facilitate communication between the subdevices' drivers and some common sysfs attributes. Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman