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![]() The Coresight ETM drivers already support context-ID tracing, but it won't work when PID namespace is enabled. This is because when using PID namespace a process id (ie. VPID) seen from the current namespace differs from the id (ie. PID) seen by kernel. So when users write the process id seen by themselves to ETM, there needs to be a translation from VPID to PID, as such ETM drivers will write the PID into the Context ID register correctly. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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coresight |