| Date | Wed, 27 Jan 2021 13:54:17 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH V3 14/14] coresight: etm-perf: Add support for trace buffer format |
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On Wed, Jan 27, 2021 at 02:25:38PM +0530, Anshuman Khandual wrote:
> It is possible to have a > perf session where some events end up collecting the trace > in TMC-ETR while the others in TRBE. Thus we need a way > to identify the type of the trace for each AUX record.
> diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h > index 9a5ca45..169e6b3 100644 > --- a/include/uapi/linux/perf_event.h > +++ b/include/uapi/linux/perf_event.h > @@ -1111,6 +1111,10 @@ enum perf_callchain_context { > #define PERF_AUX_FLAG_COLLISION 0x08 /* sample collided with another */ > #define PERF_AUX_FLAG_PMU_FORMAT_TYPE_MASK 0xff00 /* PMU specific trace format type */ > > +/* CoreSight PMU AUX buffer formats */ > +#define PERF_AUX_FLAG_CORESIGHT_FORMAT_CORESIGHT 0x0000 /* Default for backward compatibility */ > +#define PERF_AUX_FLAG_CORESIGHT_FORMAT_RAW 0x0100 /* Raw format of the source */
Would CORESIGHT_FORMAT_ETR / CORESIGHT_FORMAT_TRBE be better names?
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