coresight: etm4x: Detect system instructions support
commit 501c5032d2ced7b746f4e7450f31b7389e118b14 from git@git.assembla.com:cavium/WindRiver.linux.git ETM v4.4 onwards adds support for system instruction access to the ETM. Detect the support on an ETM and switch to using the mode when available. Link: https://lore.kernel.org/r/20210110224850.1880240-23-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/20210201181351.1475223-25-mathieu.poirier@linaro.org Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
Ruiqiang Hao <Ruiqiang.Hao@windriver.com>
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