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>

1 files changed, 12 insertions, 7 deletions

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;