1 files changed, 53 insertions, 8 deletions

diff --git a/tools/perf/arch/powerpc/util/kvm-stat.c b/tools/perf/arch/powerpc/util/kvm-stat.c
index f9db341c47b6..16807269317c 100644
--- a/tools/perf/arch/powerpc/util/kvm-stat.c
+++ b/tools/perf/arch/powerpc/util/kvm-stat.c
@@ -5,9 +5,11 @@
 #include "util/debug.h"
 #include "util/evsel.h"
 #include "util/evlist.h"
+#include "util/pmu.h"
 
 #include "book3s_hv_exits.h"
 #include "book3s_hcalls.h"
+#include <subcmd/parse-options.h>
 
 #define NR_TPS 4
 
@@ -32,7 +34,7 @@ const char *ppc_book3s_hv_kvm_tp[] = {
 const char *kvm_events_tp[NR_TPS + 1];
 const char *kvm_exit_reason;
 
-static void hcall_event_get_key(struct perf_evsel *evsel,
+static void hcall_event_get_key(struct evsel *evsel,
 				struct perf_sample *sample,
 				struct event_key *key)
 {
@@ -55,14 +57,14 @@ static const char *get_hcall_exit_reason(u64 exit_code)
 	return "UNKNOWN";
 }
 
-static bool hcall_event_end(struct perf_evsel *evsel,
+static bool hcall_event_end(struct evsel *evsel,
 			    struct perf_sample *sample __maybe_unused,
 			    struct event_key *key __maybe_unused)
 {
 	return (!strcmp(evsel->name, kvm_events_tp[3]));
 }
 
-static bool hcall_event_begin(struct perf_evsel *evsel,
+static bool hcall_event_begin(struct evsel *evsel,
 			      struct perf_sample *sample, struct event_key *key)
 {
 	if (!strcmp(evsel->name, kvm_events_tp[2])) {
@@ -106,20 +108,20 @@ const char * const kvm_skip_events[] = {
 };
 
 
-static int is_tracepoint_available(const char *str, struct perf_evlist *evlist)
+static int is_tracepoint_available(const char *str, struct evlist *evlist)
 {
 	struct parse_events_error err;
 	int ret;
 
-	err.str = NULL;
+	bzero(&err, sizeof(err));
 	ret = parse_events(evlist, str, &err);
 	if (err.str)
-		pr_err("%s : %s\n", str, err.str);
+		parse_events_print_error(&err, "tracepoint");
 	return ret;
 }
 
 static int ppc__setup_book3s_hv(struct perf_kvm_stat *kvm,
-				struct perf_evlist *evlist)
+				struct evlist *evlist)
 {
 	const char **events_ptr;
 	int i, nr_tp = 0, err = -1;
@@ -146,7 +148,7 @@ static int ppc__setup_book3s_hv(struct perf_kvm_stat *kvm,
 /* Wrapper to setup kvm tracepoints */
 static int ppc__setup_kvm_tp(struct perf_kvm_stat *kvm)
 {
-	struct perf_evlist *evlist = perf_evlist__new();
+	struct evlist *evlist = evlist__new();
 
 	if (evlist == NULL)
 		return -ENOMEM;
@@ -172,3 +174,46 @@ int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused)
 
 	return ret;
 }
+
+/*
+ * Incase of powerpc architecture, pmu registers are programmable
+ * by guest kernel. So monitoring guest via host may not provide
+ * valid samples with default 'cycles' event. It is better to use
+ * 'trace_imc/trace_cycles' event for guest profiling, since it
+ * can track the guest instruction pointer in the trace-record.
+ *
+ * Function to parse the arguments and return appropriate values.
+ */
+int kvm_add_default_arch_event(int *argc, const char **argv)
+{
+	const char **tmp;
+	bool event = false;
+	int i, j = *argc;
+
+	const struct option event_options[] = {
+		OPT_BOOLEAN('e', "event", &event, NULL),
+		OPT_END()
+	};
+
+	tmp = calloc(j + 1, sizeof(char *));
+	if (!tmp)
+		return -EINVAL;
+
+	for (i = 0; i < j; i++)
+		tmp[i] = argv[i];
+
+	parse_options(j, tmp, event_options, NULL, PARSE_OPT_KEEP_UNKNOWN);
+	if (!event) {
+		if (pmu_have_event("trace_imc", "trace_cycles")) {
+			argv[j++] = strdup("-e");
+			argv[j++] = strdup("trace_imc/trace_cycles/");
+			*argc += 2;
+		} else {
+			free(tmp);
+			return -EINVAL;
+		}
+	}
+
+	free(tmp);
+	return 0;
+}