linux-kernel - Re: [PATCH 0/5] coresight: Support context-ID tracing when PID namespace is enabled

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Message-ID: <CANLsYkwBmquLNiDfUXzZmwEDR7Ow2CPPCoiUrSQKgXTnoN0ohg@mail.gmail.com>
Date:	Mon, 13 Jul 2015 11:26:11 -0600
From:	Mathieu Poirier <mathieu.poirier@...aro.org>
To:	Chunyan Zhang <zhang.chunyan@...aro.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Mark Brown <broonie@...nel.org>,
	Serge Broslavsky <serge.broslavsky@...aro.org>,
	Lyra Zhang <zhang.lyra@...il.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, linux-api@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/5] coresight: Support context-ID tracing when PID
 namespace is enabled

On 7 July 2015 at 02:41, Chunyan Zhang <zhang.chunyan@...aro.org> wrote:
> The Coresight ETM drivers already support context-ID tracing, but it won't
> work when PID namespace is enabled. This is because when using PID
> namespace a process id (ie. VPID) seen from the current namespace differs
> from the id (ie. PID) seen by kernel.
>
> This patch-set does add a translation between VPID and PID.
>
> Chunyan Zhang (5):
>   coresight-etm3x: Change the name of the ctxid_val to ctxid_pid
>   coresight-etm4x: Change the name of the ctxid_val to ctxid_pid
>   Coresight: Add an interface for supporting ETM3/4 Context ID tracing
>   coresight-etm3x: Support context-ID tracing when PID namespace is
>     enabled
>   coresight-etm4x: Support context-ID tracing when PID namespace is
>     enabled
>
>  .../ABI/testing/sysfs-bus-coresight-devices-etm3x  |  2 +-
>  .../ABI/testing/sysfs-bus-coresight-devices-etm4x  |  2 +-
>  drivers/hwtracing/coresight/coresight-etm.h        |  7 ++--
>  drivers/hwtracing/coresight/coresight-etm3x.c      | 28 +++++++++-------
>  drivers/hwtracing/coresight/coresight-etm4x.c      | 37 ++++++++++++++--------
>  drivers/hwtracing/coresight/coresight-etm4x.h      |  7 ++--
>  include/linux/coresight.h                          | 20 ++++++++++++
>  7 files changed, 72 insertions(+), 31 deletions(-)
>
> --
> 1.9.1
>

Applied - thanks.
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