perf intel-pt: Record Event Trace capability flag

The change to the MODE.Exec packet means processing must distinguish between the old and new cases. Record the Event Trace capability flag to make that possible. Signed-off-by: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Jiri Olsa <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
LoveHeat · Feb 15, 2022 · f2be829 · f2be829
1 parent 8ee9a9a
commit f2be829
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Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
@@ -306,6 +306,7 @@ intel_pt_info_priv_size(struct auxtrace_record *itr, struct evlist *evlist)
 
 	ptr->priv_size = (INTEL_PT_AUXTRACE_PRIV_MAX * sizeof(u64)) +
 			 intel_pt_filter_bytes(filter);
+	ptr->priv_size += sizeof(u64); /* Cap Event Trace */
 
 	return ptr->priv_size;
 }
@@ -335,6 +336,7 @@ static int intel_pt_info_fill(struct auxtrace_record *itr,
 	unsigned long max_non_turbo_ratio;
 	size_t filter_str_len;
 	const char *filter;
+	int event_trace;
 	__u64 *info;
 	int err;
 
@@ -357,6 +359,9 @@ static int intel_pt_info_fill(struct auxtrace_record *itr,
 	if (perf_pmu__scan_file(intel_pt_pmu, "max_nonturbo_ratio",
 				"%lu", &max_non_turbo_ratio) != 1)
 		max_non_turbo_ratio = 0;
+	if (perf_pmu__scan_file(intel_pt_pmu, "caps/event_trace",
+				"%d", &event_trace) != 1)
+		event_trace = 0;
 
 	filter = intel_pt_find_filter(session->evlist, ptr->intel_pt_pmu);
 	filter_str_len = filter ? strlen(filter) : 0;
@@ -407,6 +412,8 @@ static int intel_pt_info_fill(struct auxtrace_record *itr,
 		info += len >> 3;
 	}
 
+	*info++ = event_trace;
+
 	return 0;
 }
 

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
@@ -75,6 +75,7 @@ struct intel_pt {
 	bool mispred_all;
 	bool use_thread_stack;
 	bool callstack;
+	bool cap_event_trace;
 	unsigned int br_stack_sz;
 	unsigned int br_stack_sz_plus;
 	int have_sched_switch;
@@ -3795,7 +3796,7 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
 	}
 
 	info = &auxtrace_info->priv[INTEL_PT_FILTER_STR_LEN] + 1;
-	info_end = (void *)info + auxtrace_info->header.size;
+	info_end = (void *)auxtrace_info + auxtrace_info->header.size;
 
 	if (intel_pt_has(auxtrace_info, INTEL_PT_FILTER_STR_LEN)) {
 		size_t len;
@@ -3834,6 +3835,13 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
 		intel_pt_print_info_str("Filter string", pt->filter);
 	}
 
+	if ((void *)info < info_end) {
+		pt->cap_event_trace = *info++;
+		if (dump_trace)
+			fprintf(stdout, "  Cap Event Trace     %d\n",
+				pt->cap_event_trace);
+	}
+
 	pt->timeless_decoding = intel_pt_timeless_decoding(pt);
 	if (pt->timeless_decoding && !pt->tc.time_mult)
 		pt->tc.time_mult = 1;