• Mathieu Poirier's avatar
    coresight: reset "enable_sink" flag when need be · d52c9750
    Mathieu Poirier authored
    When using coresight from the perf interface sinks are specified
    as part of the perf command line.  As such the sink needs to be
    disabled once it has been acknowledged by the coresight framework.
    Otherwise the sink stays enabled, which may interfere with other
    sessions.
    
    This patch removes the sink selection check from the build path
    process and make it a function on it's own.  The function is
    then used when operating from sysFS or perf to determine what
    sink has been selected.
    
    If operated from perf the status of the "enable_sink" flag is
    reset so that concurrent session can use a different sink.  When
    used from sysFS the status of the flag is left untouched since
    users have full control.
    
    The implementation doesn't handle a scenario where a sink has
    been enabled from sysFS and another sink is selected from the
    perf command line as both modes of operation are mutually
    exclusive.
    Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
    Reviewed-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    d52c9750
coresight-priv.h 3.64 KB