coresight: etm4x: Add support for PE OS lock

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ETE may not implement the OS lock and instead could rely on
the PE OS Lock for the trace unit access. This is indicated
by the TRCOLSR.OSM == 0b100. Add support for handling the
PE OS lock

Cc: Mike Leach <mike.leach@linaro.org>
Reviewed-by: mike.leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20210405164307.1720226-12-suzuki.poulose@arm.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

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Suzuki K Poulose 2021-04-05 17:42:58 +01:00 • committed by Mathieu Poirier

parent 2b921b671a

commit bc2c689f06

2 changed files with 56 additions and 9 deletions

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50

drivers/hwtracing/coresight/coresight-etm4x-core.c

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15

drivers/hwtracing/coresight/coresight-etm4x.h

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