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authorDave Martin <dave.martin@linaro.org>2013-02-06 15:45:23 +0000
committerNicolas Pitre <nicolas.pitre@linaro.org>2013-06-20 00:45:29 -0400
commitb87db1b9e394f0d6c25bb9a4d2c85144fc571b5d (patch)
tree249aa384b8045b9d911d8399ce640172d2fe2616 /arch/arm/include
parentd4d434a82421008a452acd022cd6730feb20851b (diff)
downloadvexpress-lsk-b87db1b9e394f0d6c25bb9a4d2c85144fc571b5d.tar.gz
ARM: bL_switcher/trace: Add trace trigger for trace bootstrapping
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: Dave Martin <dave.martin@linaro.org>
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