[PATCH v4 06/16] perf kvm: Introduce histograms data structures

[Leo Yan <leo.yan@linaro.org>]

This is a preparation to support histograms in perf kvm tool.  As first
step, this patch defines histograms data structures and initialize them.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: James Clark <james.clark@arm.com>
---
 tools/perf/builtin-kvm.c   | 18 ++++++++++++++++++
 tools/perf/util/kvm-stat.h |  1 +
 2 files changed, 19 insertions(+)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index d400434aa137..384992c8a01a 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -85,6 +85,20 @@ static struct kvm_event_key keys[] = {
 	{ NULL, NULL }
 };
 
+struct kvm_hists {
+	struct hists		hists;
+	struct perf_hpp_list	list;
+};
+
+static struct kvm_hists kvm_hists;
+
+static int kvm_hists__init(void)
+{
+	__hists__init(&kvm_hists.hists, &kvm_hists.list);
+	perf_hpp_list__init(&kvm_hists.list);
+	return 0;
+}
+
 static const char *get_filename_for_perf_kvm(void)
 {
 	const char *filename;
@@ -957,6 +971,8 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
 	set_term_quiet_input(&save);
 	init_kvm_event_record(kvm);
 
+	kvm_hists__init();
+
 	signal(SIGINT, sig_handler);
 	signal(SIGTERM, sig_handler);
 
@@ -1152,6 +1168,8 @@ static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
 	init_kvm_event_record(kvm);
 	setup_pager();
 
+	kvm_hists__init();
+
 	ret = read_events(kvm);
 	if (ret)
 		goto exit;
diff --git a/tools/perf/util/kvm-stat.h b/tools/perf/util/kvm-stat.h
index e84f1cdcfe05..a53cebe519b3 100644
--- a/tools/perf/util/kvm-stat.h
+++ b/tools/perf/util/kvm-stat.h
@@ -5,6 +5,7 @@
 #ifdef HAVE_KVM_STAT_SUPPORT
 
 #include "tool.h"
+#include "sort.h"
 #include "stat.h"
 #include "record.h"
 
-- 
2.34.1