Merge tag 'perf-tools-fixes-for-v6.0-2022-08-27' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

- Fixup setup of weak groups when using 'perf stat --repeat', add a
'perf test' for it.

- Fix memory leaks in 'perf sched record' detected with
-fsanitize=address.

- Fix build when PYTHON_CONFIG is user supplied.

- Capitalize topdown metrics' names in 'perf stat', so that the output,
sometimes parsed, matches the Intel SDM docs.

- Make sure the documentation for the save_type filter about Intel
systems with Arch LBR support (12th-Gen+ client or 4th-Gen Xeon+
server) reflects recent related kernel changes.

- Fix 'perf record' man page formatting of description of support to
hybrid systems.

- Update arm64´s KVM header from the kernel sources.

* tag 'perf-tools-fixes-for-v6.0-2022-08-27' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
perf stat: Capitalize topdown metrics' names
perf docs: Update the documentation for the save_type filter
perf sched: Fix memory leaks in __cmd_record detected with -fsanitize=address
perf record: Fix manpage formatting of description of support to hybrid systems
perf test: Stat test for repeat with a weak group
perf stat: Clear evsel->reset_group for each stat run
tools kvm headers arm64: Update KVM header from the kernel sources
perf python: Fix build when PYTHON_CONFIG is user supplied

tools/arch/arm64/include/uapi/asm/kvm.h

···
 
 /* KVM_ARM_SET_DEVICE_ADDR ioctl id encoding */
 #define KVM_ARM_DEVICE_TYPE_SHIFT	0
-#define KVM_ARM_DEVICE_TYPE_MASK	(0xffff << KVM_ARM_DEVICE_TYPE_SHIFT)
+#define KVM_ARM_DEVICE_TYPE_MASK	GENMASK(KVM_ARM_DEVICE_TYPE_SHIFT + 15, \
+						KVM_ARM_DEVICE_TYPE_SHIFT)
 #define KVM_ARM_DEVICE_ID_SHIFT		16
-#define KVM_ARM_DEVICE_ID_MASK		(0xffff << KVM_ARM_DEVICE_ID_SHIFT)
+#define KVM_ARM_DEVICE_ID_MASK		GENMASK(KVM_ARM_DEVICE_ID_SHIFT + 15, \
+						KVM_ARM_DEVICE_ID_SHIFT)
 
 /* Supported device IDs */
 #define KVM_ARM_DEVICE_VGIC_V2		0

tools/perf/Documentation/intel-hybrid.txt

···
 
 It indicates cpu0-cpu15 are core cpus and cpu16-cpu23 are atom cpus.
 
-Quickstart
-
-List hybrid event
------------------
-
 As before, use perf-list to list the symbolic event.
 
 perf list
···
 be supported.
 
 Enable hybrid event with a specific pmu
----------------------------------------
 
 To enable a core only event or atom only event, following syntax is supported:
 
···
 	perf stat -e cpu_core/cycles/
 
 Create two events for one hardware event automatically
-------------------------------------------------------
 
 When creating one event and the event is available on both atom and core,
 two events are created automatically. One is for atom, the other is for
···
 The first 'cycles' is core event, the second 'cycles' is atom event.
 
 Thread mode example:
---------------------
 
 perf-stat reports the scaled counts for hybrid event and with a percentage
 displayed. The percentage is the event's running time/enabling time.
···
        604,097,080      cpu_atom/cycles/                                              (99.57%)
 
 perf-record:
-------------
 
 If there is no '-e' specified in perf record, on hybrid platform,
 it creates two default 'cycles' and adds them to event list. One
 is for core, the other is for atom.
 
 perf-stat:
-----------
 
 If there is no '-e' specified in perf stat, on hybrid platform,
 besides of software events, following events are created and

tools/perf/Documentation/perf-record.txt

···
 	- abort_tx: only when the target is a hardware transaction abort
 	- cond: conditional branches
 	- save_type: save branch type during sampling in case binary is not available later
+		     For the platforms with Intel Arch LBR support (12th-Gen+ client or
+		     4th-Gen Xeon+ server), the save branch type is unconditionally enabled
+		     when the taken branch stack sampling is enabled.
 
 +
 The option requires at least one branch type among any, any_call, any_ret, ind_call, cond.
···
 defaults to CPU layout. Masks defined or provided by the option value are
 filtered through the mask provided by -C option.
 
-include::intel-hybrid.txt[]
-
 --debuginfod[=URLs]::
 	Specify debuginfod URL to be used when cacheing perf.data binaries,
 	it follows the same syntax as the DEBUGINFOD_URLS variable, like:
···
 	Note that BPF can collect stack traces using frame pointer ("fp")
 	only, as of now.  So the applications built without the frame
 	pointer might see bogus addresses.
+
+include::intel-hybrid.txt[]
 
 SEE ALSO
 --------

tools/perf/Makefile.config

···
 # defined. get-executable-or-default fails with an error if the first argument is supplied but
 # doesn't exist.
 override PYTHON_CONFIG := $(call get-executable-or-default,PYTHON_CONFIG,$(PYTHON_AUTO))
-override PYTHON := $(call get-executable-or-default,PYTHON,$(subst -config,,$(PYTHON_AUTO)))
+override PYTHON := $(call get-executable-or-default,PYTHON,$(subst -config,,$(PYTHON_CONFIG)))
 
 grep-libs  = $(filter -l%,$(1))
 strip-libs  = $(filter-out -l%,$(1))

tools/perf/builtin-sched.c

···
 static int __cmd_record(int argc, const char **argv)
 {
 	unsigned int rec_argc, i, j;
-	const char **rec_argv;
+	char **rec_argv;
+	const char **rec_argv_copy;
 	const char * const record_args[] = {
 		"record",
 		"-a",
···
 		ARRAY_SIZE(schedstat_args) : 0;
 
 	struct tep_event *waking_event;
+	int ret;
 
 	/*
 	 * +2 for either "-e", "sched:sched_wakeup" or
···
 	 */
 	rec_argc = ARRAY_SIZE(record_args) + 2 + schedstat_argc + argc - 1;
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
-
 	if (rec_argv == NULL)
 		return -ENOMEM;
+	rec_argv_copy = calloc(rec_argc + 1, sizeof(char *));
+	if (rec_argv_copy == NULL) {
+		free(rec_argv);
+		return -ENOMEM;
+	}
 
 	for (i = 0; i < ARRAY_SIZE(record_args); i++)
 		rec_argv[i] = strdup(record_args[i]);
 
-	rec_argv[i++] = "-e";
+	rec_argv[i++] = strdup("-e");
 	waking_event = trace_event__tp_format("sched", "sched_waking");
 	if (!IS_ERR(waking_event))
 		rec_argv[i++] = strdup("sched:sched_waking");
···
 		rec_argv[i++] = strdup(schedstat_args[j]);
 
 	for (j = 1; j < (unsigned int)argc; j++, i++)
-		rec_argv[i] = argv[j];
+		rec_argv[i] = strdup(argv[j]);
 
 	BUG_ON(i != rec_argc);
 
-	return cmd_record(i, rec_argv);
+	memcpy(rec_argv_copy, rec_argv, sizeof(char *) * rec_argc);
+	ret = cmd_record(rec_argc, rec_argv_copy);
+
+	for (i = 0; i < rec_argc; i++)
+		free(rec_argv[i]);
+	free(rec_argv);
+	free(rec_argv_copy);
+
+	return ret;
 }
 
 int cmd_sched(int argc, const char **argv)

tools/perf/builtin-stat.c

···
 	}
 
 	evlist__for_each_entry(evsel_list, counter) {
+		counter->reset_group = false;
 		if (bpf_counter__load(counter, &target))
 			return -1;
 		if (!evsel__is_bpf(counter))

tools/perf/tests/shell/stat.sh

···
   echo "stat record and report test [Success]"
 }
 
+test_stat_repeat_weak_groups() {
+  echo "stat repeat weak groups test"
+  if ! perf stat -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}' \
+     true 2>&1 | grep -q 'seconds time elapsed'
+  then
+    echo "stat repeat weak groups test [Skipped event parsing failed]"
+    return
+  fi
+  if ! perf stat -r2 -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}:W' \
+    true > /dev/null 2>&1
+  then
+    echo "stat repeat weak groups test [Failed]"
+    err=1
+    return
+  fi
+  echo "stat repeat weak groups test [Success]"
+}
+
 test_topdown_groups() {
   # Topdown events must be grouped with the slots event first. Test that
   # parse-events reorders this.
···
 
 test_default_stat
 test_stat_record_report
+test_stat_repeat_weak_groups
 test_topdown_groups
 test_topdown_weak_groups
 exit $err

tools/perf/util/stat-shadow.c

···
 						  &rsd);
 		if (retiring > 0.7)
 			color = PERF_COLOR_GREEN;
-		print_metric(config, ctxp, color, "%8.1f%%", "retiring",
+		print_metric(config, ctxp, color, "%8.1f%%", "Retiring",
 				retiring * 100.);
 	} else if (perf_stat_evsel__is(evsel, TOPDOWN_FE_BOUND) &&
 		   full_td(cpu_map_idx, st, &rsd)) {
···
 						  &rsd);
 		if (fe_bound > 0.2)
 			color = PERF_COLOR_RED;
-		print_metric(config, ctxp, color, "%8.1f%%", "frontend bound",
+		print_metric(config, ctxp, color, "%8.1f%%", "Frontend Bound",
 				fe_bound * 100.);
 	} else if (perf_stat_evsel__is(evsel, TOPDOWN_BE_BOUND) &&
 		   full_td(cpu_map_idx, st, &rsd)) {
···
 						  &rsd);
 		if (be_bound > 0.2)
 			color = PERF_COLOR_RED;
-		print_metric(config, ctxp, color, "%8.1f%%", "backend bound",
+		print_metric(config, ctxp, color, "%8.1f%%", "Backend Bound",
 				be_bound * 100.);
 	} else if (perf_stat_evsel__is(evsel, TOPDOWN_BAD_SPEC) &&
 		   full_td(cpu_map_idx, st, &rsd)) {
···
 						  &rsd);
 		if (bad_spec > 0.1)
 			color = PERF_COLOR_RED;
-		print_metric(config, ctxp, color, "%8.1f%%", "bad speculation",
+		print_metric(config, ctxp, color, "%8.1f%%", "Bad Speculation",
 				bad_spec * 100.);
 	} else if (perf_stat_evsel__is(evsel, TOPDOWN_HEAVY_OPS) &&
 			full_td(cpu_map_idx, st, &rsd) && (config->topdown_level > 1)) {
···
 
 		if (retiring > 0.7 && heavy_ops > 0.1)
 			color = PERF_COLOR_GREEN;
-		print_metric(config, ctxp, color, "%8.1f%%", "heavy operations",
+		print_metric(config, ctxp, color, "%8.1f%%", "Heavy Operations",
 				heavy_ops * 100.);
 		if (retiring > 0.7 && light_ops > 0.6)
 			color = PERF_COLOR_GREEN;
 		else
 			color = NULL;
-		print_metric(config, ctxp, color, "%8.1f%%", "light operations",
+		print_metric(config, ctxp, color, "%8.1f%%", "Light Operations",
 				light_ops * 100.);
 	} else if (perf_stat_evsel__is(evsel, TOPDOWN_BR_MISPREDICT) &&
 			full_td(cpu_map_idx, st, &rsd) && (config->topdown_level > 1)) {
···
 
 		if (bad_spec > 0.1 && br_mis > 0.05)
 			color = PERF_COLOR_RED;
-		print_metric(config, ctxp, color, "%8.1f%%", "branch mispredict",
+		print_metric(config, ctxp, color, "%8.1f%%", "Branch Mispredict",
 				br_mis * 100.);
 		if (bad_spec > 0.1 && m_clears > 0.05)
 			color = PERF_COLOR_RED;
 		else
 			color = NULL;
-		print_metric(config, ctxp, color, "%8.1f%%", "machine clears",
+		print_metric(config, ctxp, color, "%8.1f%%", "Machine Clears",
 				m_clears * 100.);
 	} else if (perf_stat_evsel__is(evsel, TOPDOWN_FETCH_LAT) &&
 			full_td(cpu_map_idx, st, &rsd) && (config->topdown_level > 1)) {
···
 
 		if (fe_bound > 0.2 && fetch_lat > 0.15)
 			color = PERF_COLOR_RED;
-		print_metric(config, ctxp, color, "%8.1f%%", "fetch latency",
+		print_metric(config, ctxp, color, "%8.1f%%", "Fetch Latency",
 				fetch_lat * 100.);
 		if (fe_bound > 0.2 && fetch_bw > 0.1)
 			color = PERF_COLOR_RED;
 		else
 			color = NULL;
-		print_metric(config, ctxp, color, "%8.1f%%", "fetch bandwidth",
+		print_metric(config, ctxp, color, "%8.1f%%", "Fetch Bandwidth",
 				fetch_bw * 100.);
 	} else if (perf_stat_evsel__is(evsel, TOPDOWN_MEM_BOUND) &&
 			full_td(cpu_map_idx, st, &rsd) && (config->topdown_level > 1)) {
···
 
 		if (be_bound > 0.2 && mem_bound > 0.2)
 			color = PERF_COLOR_RED;
-		print_metric(config, ctxp, color, "%8.1f%%", "memory bound",
+		print_metric(config, ctxp, color, "%8.1f%%", "Memory Bound",
 				mem_bound * 100.);
 		if (be_bound > 0.2 && core_bound > 0.1)
 			color = PERF_COLOR_RED;
 		else
 			color = NULL;
-		print_metric(config, ctxp, color, "%8.1f%%", "Core bound",
+		print_metric(config, ctxp, color, "%8.1f%%", "Core Bound",
 				core_bound * 100.);
 	} else if (evsel->metric_expr) {
 		generic_metric(config, evsel->metric_expr, evsel->metric_events, NULL,