perf mem: Add mem_events into the supported perf_pmu

With the mem_events, perf doesn't need to read sysfs for each PMU to
find the mem-events-supported PMU. The patch also makes it possible to
clean up the related __weak functions later.

The patch is only to add the mem_events into the perf_pmu for all ARCHs.
It will be used in the later cleanup patches.

Reviewed-by: Ian Rogers <[e-mail]>
Reviewed-by: Kajol Jain <[e-mail]>
Tested-by: Ravi Bangoria <[e-mail]>
Tested-by: Leo Yan <[e-mail]>
Tested-by: Kajol Jain <[e-mail]>
Suggested-by: Leo Yan <[e-mail]>
Signed-off-by: Kan Liang <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Namhyung Kim <[e-mail]>

tools/perf/arch/arm/util/pmu.c

···
 #include "hisi-ptt.h"
 #include "../../../util/pmu.h"
 #include "../../../util/cs-etm.h"
+#include "../../arm64/util/mem-events.h"
 
 void perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
 {
···
 		pmu->selectable = true;
 		pmu->is_uncore = false;
 		pmu->perf_event_attr_init_default = arm_spe_pmu_default_config;
+		if (!strcmp(pmu->name, "arm_spe_0"))
+			pmu->mem_events = perf_mem_events_arm;
 	} else if (strstarts(pmu->name, HISI_PTT_PMU_NAME)) {
 		pmu->selectable = true;
 #endif

tools/perf/arch/arm64/util/mem-events.c

···
 // SPDX-License-Identifier: GPL-2.0
-#include "map_symbol.h"
+#include "util/map_symbol.h"
+#include "util/mem-events.h"
 #include "mem-events.h"
 
 #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
 
-static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
+struct perf_mem_event perf_mem_events_arm[PERF_MEM_EVENTS__MAX] = {
 	E("spe-load",	"arm_spe_0/ts_enable=1,pa_enable=1,load_filter=1,store_filter=0,min_latency=%u/",	"arm_spe_0"),
 	E("spe-store",	"arm_spe_0/ts_enable=1,pa_enable=1,load_filter=0,store_filter=1/",			"arm_spe_0"),
 	E("spe-ldst",	"arm_spe_0/ts_enable=1,pa_enable=1,load_filter=1,store_filter=1,min_latency=%u/",	"arm_spe_0"),
···
 	if (i >= PERF_MEM_EVENTS__MAX)
 		return NULL;
 
-	return &perf_mem_events[i];
+	return &perf_mem_events_arm[i];
 }
 
 const char *perf_mem_events__name(int i, const char *pmu_name __maybe_unused)

tools/perf/arch/arm64/util/mem-events.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ARM64_MEM_EVENTS_H
+#define _ARM64_MEM_EVENTS_H
+
+extern struct perf_mem_event perf_mem_events_arm[PERF_MEM_EVENTS__MAX];
+
+#endif /* _ARM64_MEM_EVENTS_H */

tools/perf/arch/x86/util/mem-events.c

···
 
 #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
 
-static struct perf_mem_event perf_mem_events_intel[PERF_MEM_EVENTS__MAX] = {
+struct perf_mem_event perf_mem_events_intel[PERF_MEM_EVENTS__MAX] = {
 	E("ldlat-loads",	"%s/mem-loads,ldlat=%u/P",	"%s/events/mem-loads"),
 	E("ldlat-stores",	"%s/mem-stores/P",		"%s/events/mem-stores"),
 	E(NULL,			NULL,				NULL),
 };
 
-static struct perf_mem_event perf_mem_events_amd[PERF_MEM_EVENTS__MAX] = {
+struct perf_mem_event perf_mem_events_amd[PERF_MEM_EVENTS__MAX] = {
 	E(NULL,		NULL,		NULL),
 	E(NULL,		NULL,		NULL),
 	E("mem-ldst",	"ibs_op//",	"ibs_op"),

tools/perf/arch/x86/util/mem-events.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _X86_MEM_EVENTS_H
+#define _X86_MEM_EVENTS_H
+
+extern struct perf_mem_event perf_mem_events_intel[PERF_MEM_EVENTS__MAX];
+
+extern struct perf_mem_event perf_mem_events_amd[PERF_MEM_EVENTS__MAX];
+
+#endif /* _X86_MEM_EVENTS_H */

tools/perf/arch/x86/util/pmu.c

···
 #include "../../../util/pmu.h"
 #include "../../../util/fncache.h"
 #include "../../../util/pmus.h"
+#include "mem-events.h"
 #include "env.h"
 
 void perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
···
 		pmu->selectable = true;
 	}
 #endif
+
+	if (x86__is_amd_cpu()) {
+		if (!strcmp(pmu->name, "ibs_op"))
+			pmu->mem_events = perf_mem_events_amd;
+	} else if (pmu->is_core)
+		pmu->mem_events = perf_mem_events_intel;
 }
 
 int perf_pmus__num_mem_pmus(void)

tools/perf/util/mem-events.c

···
 
 #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
 
-static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
+struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
 	E("ldlat-loads",	"cpu/mem-loads,ldlat=%u/P",	"cpu/events/mem-loads"),
 	E("ldlat-stores",	"cpu/mem-stores/P",		"cpu/events/mem-stores"),
 	E(NULL,			NULL,				NULL),

tools/perf/util/mem-events.h

···
 };
 
 extern unsigned int perf_mem_events__loads_ldlat;
+extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
 
 int perf_mem_events__parse(const char *str);
 int perf_mem_events__init(void);

tools/perf/util/pmu.c

···
 }
 
 void __weak
-perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
+perf_pmu__arch_init(struct perf_pmu *pmu)
 {
+	if (pmu->is_core)
+		pmu->mem_events = perf_mem_events;
 }
 
 struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *name)

tools/perf/util/pmu.h

···
 #include <stdio.h>
 #include "parse-events.h"
 #include "pmu-events/pmu-events.h"
+#include "map_symbol.h"
+#include "mem-events.h"
 
 struct evsel_config_term;
 struct perf_cpu_map;
···
 		 */
 		bool exclude_guest;
 	} missing_features;
+
+	/**
+	 * @mem_events: List of the supported mem events
+	 */
+	struct perf_mem_event *mem_events;
 };
 
 /** @perf_pmu__fake: A special global PMU used for testing. */