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  • Dave Martin's avatar
    ARM: bL_switcher/trace: Add trace trigger for trace bootstrapping · b09bbe5b
    Dave Martin authored
    When tracing switching, an external tracer needs a way to bootstrap
    its knowledge of the logical<->physical CPU mapping.
    
    This patch adds a sysfs attribute trace_trigger.  A write to this
    attribute will generate a power:cpu_migrate_current event for each
    online CPU, indicating the current physical CPU for each logical
    CPU.
    
    Activating or deactivating the switcher also generates these
    events, so that the tracer knows about the resulting remapping of
    affected CPUs.
    Signed-off-by: default avatarDave Martin <dave.martin@linaro.org>
    b09bbe5b
power_cpu_migrate.h 1.55 KB