[PATCH 0/2] coresight: ultrasoc: Add support for System Memory Buffer device

[Qi Liu]

This patchset add support for SMB(System Memory Buffer) device, SMB
obtains CPU instructions from Coresight ETM device and stores these
messages in system memory.
SMB is developed by Ultrasoc technology, which is acquired by Siemens,
and we still use "Ultrasoc" to name document and driver.

Change since RFC:
- Move ultrasoc driver to drivers/hwtracing/coresight.
- Remove ultrasoc-axi-com.c, as AXI-COM doesn't need to be configured in
  basic tracing function.
- Remove ultrasoc.c as SMB does not need to register with the ultrasoc core.
- Address the comments from Mathieu and Suzuki.
- Link: https://lists.linaro.org/pipermail/coresight/2021-June/006535.html

Qi Liu (2):
  Documentation: tracing: Documentation for ultrasoc SMB drivers
  coresight: ultrasoc: Add System Memory Buffer driver

 .../trace/coresight/ultrasoc-trace.rst        | 193 +++++
 MAINTAINERS                                   |   7 +
 drivers/hwtracing/coresight/Kconfig           |   3 +
 drivers/hwtracing/coresight/Makefile          |   2 +
 drivers/hwtracing/coresight/ultrasoc/Kconfig  |  12 +
 drivers/hwtracing/coresight/ultrasoc/Makefile |   6 +
 .../coresight/ultrasoc/ultrasoc-smb.c         | 722 ++++++++++++++++++
 .../coresight/ultrasoc/ultrasoc-smb.h         | 142 ++++
 8 files changed, 1087 insertions(+)
 create mode 100644 Documentation/trace/coresight/ultrasoc-trace.rst
 create mode 100644 drivers/hwtracing/coresight/ultrasoc/Kconfig
 create mode 100644 drivers/hwtracing/coresight/ultrasoc/Makefile
 create mode 100644 drivers/hwtracing/coresight/ultrasoc/ultrasoc-smb.c
 create mode 100644 drivers/hwtracing/coresight/ultrasoc/ultrasoc-smb.h

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2.17.1