coresight: etm4x: Add support for sysreg only devices

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Add support for devices with system instruction access only.
They don't have a memory mapped interface and thus are not
AMBA devices. System register access is not permitted to
TRCPDCR and thus skip access to them.

Link: https://lore.kernel.org/r/20210110224850.1880240-26-suzuki.poulose@arm.com
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210201181351.1475223-28-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Suzuki K Poulose 2021-02-01 11:13:47 -07:00 • committed by Greg Kroah-Hartman

parent e97db2cf09

commit 5214b56358

1 changed files with 63 additions and 5 deletions

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

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