coresight: etb10: Add support for CPU-wide trace scenarios

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This patch adds support for CPU-wide trace scenarios by making sure that
only the sources monitoring the same process have access to a common sink.
Because the sink is shared between sources, the first source to use the
sink switches it on while the last one does the cleanup.  Any attempt to
modify the HW is overlooked for as long as more than one source is using
a sink.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Robert Walker <robert.walker@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Mathieu Poirier 2019-04-25 13:53:10 -06:00 • committed by Greg Kroah-Hartman

parent 880af782c6

commit 75d7dbd388

1 changed files with 39 additions and 4 deletions

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drivers/hwtracing/coresight/coresight-etb10.c

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