perf hist: Add 'kvm_info' field in histograms entry

__hists__add_entry() creates a temporary entry and compare it with
existed histograms entries, if any existed entry equals to the
temporary entry it skips to allocation to avoid duplication.

The problem for support KVM event in histograms is it doesn't contain
any info to identify KVM event and can be used for comparison entries.

This patch adds 'kvm_info' field in the histograms entry which contains
the KVM event's key, this identifier will be used for comparison
histograms entries in later change.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230315145112.186603-2-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

8 files changed, 27 insertions, 14 deletions

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 90458ca6933f..4750fac7bf93 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -252,7 +252,7 @@ static int evsel__add_sample(struct evsel *evsel, struct perf_sample *sample,
 	if (ann->has_br_stack && has_annotation(ann))
 		return process_branch_callback(evsel, sample, al, ann, machine);
 
-	he = hists__add_entry(hists, al, NULL, NULL, NULL, sample, true);
+	he = hists__add_entry(hists, al, NULL, NULL, NULL, NULL, sample, true);
 	if (he == NULL)
 		return -ENOMEM;
 
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 56974eae0638..d3181fee4d3d 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -315,7 +315,7 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
 	c2c_decode_stats(&stats, mi);
 
 	he = hists__add_entry_ops(&c2c_hists->hists, &c2c_entry_ops,
-				  &al, NULL, NULL, mi,
+				  &al, NULL, NULL, mi, NULL,
 				  sample, true);
 	if (he == NULL)
 		goto free_mi;
@@ -349,7 +349,7 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
 			goto free_mi;
 
 		he = hists__add_entry_ops(&c2c_hists->hists, &c2c_entry_ops,
-					  &al, NULL, NULL, mi,
+					  &al, NULL, NULL, mi, NULL,
 					  sample, true);
 		if (he == NULL)
 			goto free_mi;
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index ed07cc6cca56..22b526766e14 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -423,7 +423,7 @@ static int diff__process_sample_event(struct perf_tool *tool,
 	switch (compute) {
 	case COMPUTE_CYCLES:
 		if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,
-					  NULL, NULL, sample, true)) {
+					  NULL, NULL, NULL, sample, true)) {
 			pr_warning("problem incrementing symbol period, "
 				   "skipping event\n");
 			goto out_put;
@@ -442,7 +442,7 @@ static int diff__process_sample_event(struct perf_tool *tool,
 		break;
 
 	default:
-		if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample,
+		if (!hists__add_entry(hists, &al, NULL, NULL, NULL, NULL, sample,
 				      true)) {
 			pr_warning("problem incrementing symbol period, "
 				   "skipping event\n");
diff --git a/tools/perf/tests/hists_link.c b/tools/perf/tests/hists_link.c
index 14b2ff808b5e..e7e4ee57ce04 100644
--- a/tools/perf/tests/hists_link.c
+++ b/tools/perf/tests/hists_link.c
@@ -87,7 +87,7 @@ static int add_hist_entries(struct evlist *evlist, struct machine *machine)
 				goto out;
 
 			he = hists__add_entry(hists, &al, NULL,
-						NULL, NULL, &sample, true);
+					      NULL, NULL, NULL, &sample, true);
 			if (he == NULL) {
 				addr_location__put(&al);
 				goto out;
@@ -106,7 +106,7 @@ static int add_hist_entries(struct evlist *evlist, struct machine *machine)
 				goto out;
 
 			he = hists__add_entry(hists, &al, NULL,
-						NULL, NULL, &sample, true);
+					      NULL, NULL, NULL, &sample, true);
 			if (he == NULL) {
 				addr_location__put(&al);
 				goto out;
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index b6e4b4edde43..3670136a0074 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -4,6 +4,7 @@
 #include "dso.h"
 #include "build-id.h"
 #include "hist.h"
+#include "kvm-stat.h"
 #include "map.h"
 #include "map_symbol.h"
 #include "branch.h"
@@ -698,6 +699,7 @@ __hists__add_entry(struct hists *hists,
 		   struct symbol *sym_parent,
 		   struct branch_info *bi,
 		   struct mem_info *mi,
+		   struct kvm_info *ki,
 		   struct block_info *block_info,
 		   struct perf_sample *sample,
 		   bool sample_self,
@@ -733,6 +735,7 @@ __hists__add_entry(struct hists *hists,
 		.hists	= hists,
 		.branch_info = bi,
 		.mem_info = mi,
+		.kvm_info = ki,
 		.block_info = block_info,
 		.transaction = sample->transaction,
 		.raw_data = sample->raw_data,
@@ -756,10 +759,11 @@ struct hist_entry *hists__add_entry(struct hists *hists,
 				    struct symbol *sym_parent,
 				    struct branch_info *bi,
 				    struct mem_info *mi,
+				    struct kvm_info *ki,
 				    struct perf_sample *sample,
 				    bool sample_self)
 {
-	return __hists__add_entry(hists, al, sym_parent, bi, mi, NULL,
+	return __hists__add_entry(hists, al, sym_parent, bi, mi, ki, NULL,
 				  sample, sample_self, NULL);
 }
 
@@ -769,10 +773,11 @@ struct hist_entry *hists__add_entry_ops(struct hists *hists,
 					struct symbol *sym_parent,
 					struct branch_info *bi,
 					struct mem_info *mi,
+					struct kvm_info *ki,
 					struct perf_sample *sample,
 					bool sample_self)
 {
-	return __hists__add_entry(hists, al, sym_parent, bi, mi, NULL,
+	return __hists__add_entry(hists, al, sym_parent, bi, mi, ki, NULL,
 				  sample, sample_self, ops);
 }
 
@@ -846,7 +851,7 @@ iter_add_single_mem_entry(struct hist_entry_iter *iter, struct addr_location *al
 	 */
 	sample->period = cost;
 
-	he = hists__add_entry(hists, al, iter->parent, NULL, mi,
+	he = hists__add_entry(hists, al, iter->parent, NULL, mi, NULL,
 			      sample, true);
 	if (!he)
 		return -ENOMEM;
@@ -949,7 +954,7 @@ iter_add_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *a
 	sample->period = 1;
 	sample->weight = bi->flags.cycles ? bi->flags.cycles : 1;
 
-	he = hists__add_entry(hists, al, iter->parent, &bi[i], NULL,
+	he = hists__add_entry(hists, al, iter->parent, &bi[i], NULL, NULL,
 			      sample, true);
 	if (he == NULL)
 		return -ENOMEM;
@@ -987,7 +992,7 @@ iter_add_single_normal_entry(struct hist_entry_iter *iter, struct addr_location
 	struct hist_entry *he;
 
 	he = hists__add_entry(evsel__hists(evsel), al, iter->parent, NULL, NULL,
-			      sample, true);
+			      NULL, sample, true);
 	if (he == NULL)
 		return -ENOMEM;
 
@@ -1047,7 +1052,7 @@ iter_add_single_cumulative_entry(struct hist_entry_iter *iter,
 	struct hist_entry *he;
 	int err = 0;
 
-	he = hists__add_entry(hists, al, iter->parent, NULL, NULL,
+	he = hists__add_entry(hists, al, iter->parent, NULL, NULL, NULL,
 			      sample, true);
 	if (he == NULL)
 		return -ENOMEM;
@@ -1148,7 +1153,7 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter,
 	}
 
 	he = hists__add_entry(evsel__hists(evsel), al, iter->parent, NULL, NULL,
-			      sample, false);
+			      NULL, sample, false);
 	if (he == NULL)
 		return -ENOMEM;
 
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index d93a4e510dc7..86a677954279 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -14,6 +14,7 @@ struct hist_entry_ops;
 struct addr_location;
 struct map_symbol;
 struct mem_info;
+struct kvm_info;
 struct branch_info;
 struct branch_stack;
 struct block_info;
@@ -150,6 +151,7 @@ struct hist_entry *hists__add_entry(struct hists *hists,
 				    struct symbol *parent,
 				    struct branch_info *bi,
 				    struct mem_info *mi,
+				    struct kvm_info *ki,
 				    struct perf_sample *sample,
 				    bool sample_self);
 
@@ -159,6 +161,7 @@ struct hist_entry *hists__add_entry_ops(struct hists *hists,
 					struct symbol *sym_parent,
 					struct branch_info *bi,
 					struct mem_info *mi,
+					struct kvm_info *ki,
 					struct perf_sample *sample,
 					bool sample_self);
 
diff --git a/tools/perf/util/kvm-stat.h b/tools/perf/util/kvm-stat.h
index 3b2eab91a9be..0cf704333c4c 100644
--- a/tools/perf/util/kvm-stat.h
+++ b/tools/perf/util/kvm-stat.h
@@ -23,6 +23,10 @@ struct event_key {
 	struct exit_reasons_table *exit_reasons;
 };
 
+struct kvm_info {
+	char name[KVM_EVENT_NAME_LEN];
+};
+
 struct kvm_event_stats {
 	u64 time;
 	struct stats stats;
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index d79a100e5999..22f437c3476f 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -144,6 +144,7 @@ struct hist_entry {
 	struct hists		*hists;
 	struct mem_info		*mem_info;
 	struct block_info	*block_info;
+	struct kvm_info		*kvm_info;
 	void			*raw_data;
 	u32			raw_size;
 	int			num_res;