linux-toradex.git/include/linux/coresight.h, branch v4.6-rc3 Linux kernel for Apalis and Colibri modules coresight: etb10: implementing AUX API 2016-02-20T22:11:01+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2016-02-18T00:52:00+00:00 2997aa4063d97fdb39450c6078bd81a7b0504f22 Adding an ETB10 specific AUX area operations to be used by the perf framework when events are initialised. Part of this operation involves modeling the mmap'ed area based on the specific ways a sink buffer gathers information. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Adding an ETB10 specific AUX area operations to be used
by the perf framework when events are initialised.

Part of this operation involves modeling the mmap'ed area
based on the specific ways a sink buffer gathers information.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: etb10: adding operation mode for sink->enable() 2016-02-20T22:11:01+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2016-02-18T00:51:59+00:00 e827d4550aa3225b8965ce4c266208cfe0297509 Adding an operation mode to the sink->enable() API in order to prevent simultaneous access from different callers. TPIU and TMC won't be supplemented with the AUX area API immediately and as such ignore the new mode. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Adding an operation mode to the sink->enable() API in order
to prevent simultaneous access from different callers.

TPIU and TMC won't be supplemented with the AUX area
API immediately and as such ignore the new mode.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: etm3x: implementing perf_enable/disable() API 2016-02-20T22:11:01+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2016-02-18T00:51:57+00:00 882d5e112491c875ab7c8c336b8beaeec54d0509 That way traces can be enabled and disabled automatically from the Perf subystem using the PMU abstraction. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
That way traces can be enabled and disabled automatically
from the Perf subystem using the PMU abstraction.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: etm3x: adding operation mode for etm_enable() 2016-02-20T22:11:01+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2016-02-18T00:51:52+00:00 22fd532eaa0c24d86e23d8e9e3b7feac4a8cac80 Adding a new mode to source API enable() in order to distinguish where the request comes from. That way it is possible to perform different operations based on where the request was issued from. The ETM4x driver is also modified to keep in sync with the new interface. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Adding a new mode to source API enable() in order to
distinguish where the request comes from.  That way it is
possible to perform different operations based on where
the request was issued from.

The ETM4x driver is also modified to keep in sync with the
new interface.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: associating path with session rather than tracer 2016-02-20T22:11:01+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2016-02-18T00:51:45+00:00 b3e94405941e6916d5e365454d74560c2bea47ca When using the Coresight framework from the sysFS interface a tracer is always handling a single session and as such, a path can be associated with a tracer. But when supporting multiple session per tracer there is no guarantee that sessions will always have the same path from source to sink. This patch is removing the automatic association between path and tracers. The building of a path and enablement of the components in the path are decoupled, allowing for the association of a path with a session rather than a tracer. To keep backward functionality with the current sysFS access methods a per-cpu place holder is used to keep a handle on the path built when tracers are enabled. Lastly APIs to build paths and enable tracers are made public so that other subsystem can interact with the Coresight framework. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
When using the Coresight framework from the sysFS interface a
tracer is always handling a single session and as such, a path
can be associated with a tracer.  But when supporting multiple
session per tracer there is no guarantee that sessions will always
have the same path from source to sink.

This patch is removing the automatic association between path and
tracers.  The building of a path and enablement of the components
in the path are decoupled, allowing for the association of a path
with a session rather than a tracer.

To keep backward functionality with the current sysFS access methods
a per-cpu place holder is used to keep a handle on the path built when
tracers are enabled.  Lastly APIs to build paths and enable tracers are
made public so that other subsystem can interact with the Coresight
framework.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: implementing 'cpu_id()' API 2016-02-08T06:12:18+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2016-02-02T21:14:01+00:00 52210c8745e418f82f3f0aeeee01d7bc4858812a Other than plainly parsing the device tree there is no way to know which CPU a tracer is affined to. As such adding an interface to lookup the CPU field enclosed in the etm_drvdata structure that was initialised at boot time. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Other than plainly parsing the device tree there is no way to
know which CPU a tracer is affined to.  As such adding an
interface to lookup the CPU field enclosed in the etm_drvdata
structure that was initialised at boot time.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: fixing typographical error 2015-10-07T16:54:09+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2015-10-07T15:26:39+00:00 1d27ff5aba2d36b152542e9d62158eb6584bcbd3 Tracing gets enabled _for_ a source rather than _from_ a source. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Tracing gets enabled _for_ a source rather than _from_ a source.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: Fix implicit inclusion of linux/sched.h 2015-08-05T20:30:16+00:00 Mark Brown broonie@kernel.org 2015-07-31T15:37:30+00:00 ff63ec1312dabd28876c9c03b5ed172a879bfb60 The patch "Coresight: Add an interface for supporting ETM3/4 Context ID tracing" adds uses of find_task_by_vpid() and task_pid_nr() from linux/sched.h but does not include that header causing build errors in at least an ARM allmodconfig where it is not implicitly included. Add an explicit include to fix that. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
The patch "Coresight: Add an interface for supporting ETM3/4 Context ID
tracing" adds uses of find_task_by_vpid() and task_pid_nr() from
linux/sched.h but does not include that header causing build errors in
at least an ARM allmodconfig where it is not implicitly included. Add an
explicit include to fix that.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Coresight: Add an interface for supporting ETM3/4 Context ID tracing 2015-08-05T20:30:15+00:00 Chunyan Zhang zhang.chunyan@linaro.org 2015-07-31T15:37:26+00:00 722102274ab1206634d31abe4f438a911a0945d2 If PID namespace is enabled, everytime users configure the Context ID register to trace the specific process, there needs to be a translation between the real PID seen from the kernel and VPID seen from the namespace in which the user's process resides . This patch just adds the translation interface for ETMs. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
If PID namespace is enabled, everytime users configure the Context ID
register to trace the specific process, there needs to be a translation
between the real PID seen from the kernel and VPID seen from the
namespace in which the user's process resides .

This patch just adds the translation interface for ETMs.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: remove the unnecessary function coresight_is_bit_set() 2015-02-04T18:42:55+00:00 Kaixu Xia xiakaixu@huawei.com 2015-01-26T16:22:22+00:00 c4546f246636ccf4cda092bcfcafcb5f5f752ec7 This function coresight_is_bit_set() isn't called, so we should remove it. Signed-off-by: Kaixu Xia <xiakaixu@huawei.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
This function coresight_is_bit_set() isn't called, so we should
remove it.

Signed-off-by: Kaixu Xia <xiakaixu@huawei.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>