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

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Date:   Thu, 2 Sep 2021 11:51:37 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Qi Liu <liuqi115@...wei.com>
Cc:     suzuki.poulose@....com, mike.leach@...aro.org,
        coresight@...ts.linaro.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linuxarm@...wei.com
Subject: Re: [PATCH 0/2] coresight: ultrasoc: Add support for System Memory
 Buffer device

On Mon, Jul 19, 2021 at 07:17:35PM +0800, Qi Liu wrote:
> 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(+)

I have started to review this set.  Comments will follow shortly.

Thanks,
Mathieu


>  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
> 
> -- 
> 2.17.1
>