perf mem: Avoid hybrid PMU list

Add perf_pmu__num_mem_pmus that scans/counts the number of PMUs for
mem events. Switch perf_pmu__for_each_hybrid_pmu to iterating all PMUs
and only handling is_core ones.

Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kang Minchul <tegongkang@gmail.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230527072210.2900565-24-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-c2c.c

@@ -42,7 +42,6 @@
 #include "ui/ui.h"
 #include "ui/progress.h"
 #include "pmu.h"
-#include "pmu-hybrid.h"
 #include "string2.h"
 #include "util/util.h"
 
@@ -3259,10 +3258,8 @@ static int perf_c2c__record(int argc, const char **argv)
 	argc = parse_options(argc, argv, options, record_mem_usage,
 			     PARSE_OPT_KEEP_UNKNOWN);
 
-	if (!perf_pmu__has_hybrid())
-		rec_argc = argc + 11; /* max number of arguments */
-	else
-		rec_argc = argc + 11 * perf_pmu__hybrid_pmu_num();
+	/* Max number of arguments multiplied by number of PMUs that can support them. */
+	rec_argc = argc + 11 * perf_pmu__num_mem_pmus();
 
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
 	if (!rec_argv)

tools/perf/builtin-mem.c

@@ -18,7 +18,6 @@
 #include "util/map.h"
 #include "util/symbol.h"
 #include "util/pmu.h"
-#include "util/pmu-hybrid.h"
 #include "util/sample.h"
 #include "util/string2.h"
 #include "util/util.h"
@@ -93,10 +92,8 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 	argc = parse_options(argc, argv, options, record_mem_usage,
 			     PARSE_OPT_KEEP_UNKNOWN);
 
-	if (!perf_pmu__has_hybrid())
-		rec_argc = argc + 9; /* max number of arguments */
-	else
-		rec_argc = argc + 9 * perf_pmu__hybrid_pmu_num();
+	/* Max number of arguments multiplied by number of PMUs that can support them. */
+	rec_argc = argc + 9 * perf_pmu__num_mem_pmus();
 
 	if (mem->cpu_list)
 		rec_argc += 2;

tools/perf/util/mem-events.c

@@ -13,7 +13,6 @@
 #include "debug.h"
 #include "symbol.h"
 #include "pmu.h"
-#include "pmu-hybrid.h"
 
 unsigned int perf_mem_events__loads_ldlat = 30;
 
@@ -120,7 +119,6 @@ int perf_mem_events__init(void)
 
 	for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
 		struct perf_mem_event *e = perf_mem_events__ptr(j);
-		struct perf_pmu *pmu;
 		char sysfs_name[100];
 
 		/*
@@ -135,7 +133,12 @@ int perf_mem_events__init(void)
 				  e->sysfs_name, "cpu");
 			e->supported = perf_mem_event__supported(mnt, sysfs_name);
 		} else {
-			perf_pmu__for_each_hybrid_pmu(pmu) {
+			struct perf_pmu *pmu = NULL;
+
+			while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+				if (!pmu->is_core)
+					continue;
+
 				scnprintf(sysfs_name, sizeof(sysfs_name),
 					  e->sysfs_name, pmu->name);
 				e->supported |= perf_mem_event__supported(mnt, sysfs_name);
@@ -170,9 +173,12 @@ static void perf_mem_events__print_unsupport_hybrid(struct perf_mem_event *e,
 {
 	const char *mnt = sysfs__mount();
 	char sysfs_name[100];
-	struct perf_pmu *pmu;
+	struct perf_pmu *pmu = NULL;
+
+	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+		if (!pmu->is_core)
+			continue;
 
-	perf_pmu__for_each_hybrid_pmu(pmu) {
 		scnprintf(sysfs_name, sizeof(sysfs_name), e->sysfs_name,
 			  pmu->name);
 		if (!perf_mem_event__supported(mnt, sysfs_name)) {
@@ -210,7 +216,9 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr,
 				return -1;
 			}
 
-			perf_pmu__for_each_hybrid_pmu(pmu) {
+			while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+				if (!pmu->is_core)
+					continue;
 				rec_argv[i++] = "-e";
 				s = perf_mem_events__name(j, pmu->name);
 				if (s) {

tools/perf/util/pmu.c

@@ -1660,6 +1660,23 @@ bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu)
 	return !is_pmu_hybrid(pmu->name);
 }
 
+static bool perf_pmu__is_mem_pmu(const struct perf_pmu *pmu)
+{
+	return pmu->is_core;
+}
+
+int perf_pmu__num_mem_pmus(void)
+{
+	struct perf_pmu *pmu = NULL;
+	int count = 0;
+
+	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+		if (perf_pmu__is_mem_pmu(pmu))
+			count++;
+	}
+	return count;
+}
+
 static bool pmu_alias_is_duplicate(struct sevent *alias_a,
 				   struct sevent *alias_b)
 {

tools/perf/util/pmu.h

@@ -231,6 +231,7 @@ bool is_pmu_hybrid(const char *name);
 bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu);
 bool perf_pmu__supports_wildcard_numeric(const struct perf_pmu *pmu);
 bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu);
+int perf_pmu__num_mem_pmus(void);
 void print_pmu_events(const struct print_callbacks *print_cb, void *print_state);
 bool pmu_have_event(const char *pname, const char *name);