Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

 * 'perf trace' arg formatting improvements to allow masking arguments
   in syscalls such as futex and open, where the some arguments are
   ignored and thus should not be printed depending on other args.

 * Beautify futex open, openat, open_by_handle_at, lseek and futex syscalls.

 * Add dummy software event to use when wanting just to keep receiving
   PERF_RECORD_{MMAP,COMM,etc}, add test for it, from Adrian Hunter.

 * Fix symbol offset computation for some dsos in 'perf script', from David Ahern.

 * Skip unsupported hardware events in 'perf list', from Namhyung Kim.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 43 insertions, 2 deletions

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 9cba92386a82..98125319b158 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -15,6 +15,7 @@
 #define YY_EXTRA_TYPE int
 #include "parse-events-flex.h"
 #include "pmu.h"
+#include "thread_map.h"
 
 #define MAX_NAME_LEN 100
 
@@ -108,6 +109,10 @@ static struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 		.symbol = "emulation-faults",
 		.alias  = "",
 	},
+	[PERF_COUNT_SW_DUMMY] = {
+		.symbol = "dummy",
+		.alias  = "",
+	},
 };
 
 #define __PERF_EVENT_FIELD(config, name) \
@@ -1072,6 +1077,33 @@ int is_valid_tracepoint(const char *event_string)
 	return 0;
 }
 
+static bool is_event_supported(u8 type, unsigned config)
+{
+	bool ret = true;
+	struct perf_evsel *evsel;
+	struct perf_event_attr attr = {
+		.type = type,
+		.config = config,
+		.disabled = 1,
+		.exclude_kernel = 1,
+	};
+	struct {
+		struct thread_map map;
+		int threads[1];
+	} tmap = {
+		.map.nr	 = 1,
+		.threads = { 0 },
+	};
+
+	evsel = perf_evsel__new(&attr, 0);
+	if (evsel) {
+		ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
+		perf_evsel__delete(evsel);
+	}
+
+	return ret;
+}
+
 static void __print_events_type(u8 type, struct event_symbol *syms,
 				unsigned max)
 {
@@ -1079,14 +1111,16 @@ static void __print_events_type(u8 type, struct event_symbol *syms,
 	unsigned i;
 
 	for (i = 0; i < max ; i++, syms++) {
+		if (!is_event_supported(type, i))
+			continue;
+
 		if (strlen(syms->alias))
 			snprintf(name, sizeof(name),  "%s OR %s",
 				 syms->symbol, syms->alias);
 		else
 			snprintf(name, sizeof(name), "%s", syms->symbol);
 
-		printf("  %-50s [%s]\n", name,
-			event_type_descriptors[type]);
+		printf("  %-50s [%s]\n", name, event_type_descriptors[type]);
 	}
 }
 
@@ -1115,6 +1149,10 @@ int print_hwcache_events(const char *event_glob, bool name_only)
 				if (event_glob != NULL && !strglobmatch(name, event_glob))
 					continue;
 
+				if (!is_event_supported(PERF_TYPE_HW_CACHE,
+							type | (op << 8) | (i << 16)))
+					continue;
+
 				if (name_only)
 					printf("%s ", name);
 				else
@@ -1144,6 +1182,9 @@ static void print_symbol_events(const char *event_glob, unsigned type,
 		      (syms->alias && strglobmatch(syms->alias, event_glob))))
 			continue;
 
+		if (!is_event_supported(type, i))
+			continue;
+
 		if (name_only) {
 			printf("%s ", syms->symbol);
 			continue;