Commit 56ae663e authored by Leo Yan's avatar Leo Yan Committed by Namhyung Kim
Browse files

perf arm-spe: Introduce arm_spe__is_homogeneous() 



Introduce the arm_spe__is_homogeneous() function, it uses to check if
Arm SPE is homogeneous cross all CPUs.

Signed-off-by: default avatarLeo Yan <leo.yan@arm.com>
Reviewed-by: default avatarJames Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20241003185322.192357-4-leo.yan@arm.com


Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
parent 50b8f1d5

tools/perf/util/arm-spe.c

+26 −0
Original line number Diff line number Diff line
@@ -82,6 +82,7 @@ struct arm_spe { 
	u64				**metadata;

	u64				metadata_ver;

	u64				metadata_nr_cpu;

	bool				is_homogeneous;

};



struct arm_spe_queue {
@@ -1374,6 +1375,30 @@ arm_spe_synth_events(struct arm_spe *spe, struct perf_session *session) 
	return 0;

}



static bool arm_spe__is_homogeneous(u64 **metadata, int nr_cpu)

{

	u64 midr;

	int i;



	if (!nr_cpu)

		return false;



	for (i = 0; i < nr_cpu; i++) {

		if (!metadata[i])

			return false;



		if (i == 0) {

			midr = metadata[i][ARM_SPE_CPU_MIDR];

			continue;

		}



		if (midr != metadata[i][ARM_SPE_CPU_MIDR])

			return false;

	}



	return true;

}



int arm_spe_process_auxtrace_info(union perf_event *event,

				  struct perf_session *session)

{
@@ -1419,6 +1444,7 @@ int arm_spe_process_auxtrace_info(union perf_event *event, 
	spe->metadata = metadata;

	spe->metadata_ver = metadata_ver;

	spe->metadata_nr_cpu = nr_cpu;

	spe->is_homogeneous = arm_spe__is_homogeneous(metadata, nr_cpu);



	spe->timeless_decoding = arm_spe__is_timeless_decoding(spe);