diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 463175f80341..56c45a9207c7 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -321,6 +321,8 @@
 #define SYS_PMINTENSET_EL1		sys_reg(3, 0, 9, 14, 1)
 #define SYS_PMINTENCLR_EL1		sys_reg(3, 0, 9, 14, 2)
 
+#define SYS_PMMIR_EL1			sys_reg(3, 0, 9, 14, 6)
+
 #define SYS_MAIR_EL1			sys_reg(3, 0, 10, 2, 0)
 #define SYS_AMAIR_EL1			sys_reg(3, 0, 10, 3, 0)
 
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 4d7879484cec..5f2ac87e4b91 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -277,6 +277,51 @@ static struct attribute_group armv8_pmuv3_format_attr_group = {
 	.attrs = armv8_pmuv3_format_attrs,
 };
 
+static inline int armv8pmu_get_pmu_version(void)
+{
+	int pmuver;
+	u64 dfr0;
+
+	dfr0 = read_sysreg(id_aa64dfr0_el1);
+	pmuver = cpuid_feature_extract_unsigned_field(dfr0,
+			ID_AA64DFR0_PMUVER_SHIFT);
+
+	return pmuver;
+}
+
+static umode_t
+armv8pmu_caps_attr_is_visible(struct kobject *kobj, struct attribute *attr,
+			      int unused)
+{
+	int pmuver = armv8pmu_get_pmu_version();
+
+	if (pmuver >= ID_AA64DFR0_PMUVER_8_4)
+		return attr->mode;
+
+	return 0;
+}
+
+static ssize_t slots_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	int slots = read_sysreg_s(SYS_PMMIR_EL1) & 0xFF;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", slots);
+}
+
+static DEVICE_ATTR_RO(slots);
+
+static struct attribute *armv8_pmuv3_caps_attrs[] = {
+	&dev_attr_slots.attr,
+	NULL,
+};
+
+static struct attribute_group armv8_pmuv3_caps_attr_group = {
+	.name = "caps",
+	.attrs = armv8_pmuv3_caps_attrs,
+	.is_visible = armv8pmu_caps_attr_is_visible,
+};
+
 /*
  * Perf Events' indices
  */
@@ -940,14 +985,11 @@ static void __armv8pmu_probe_pmu(void *info)
 {
 	struct armv8pmu_probe_info *probe = info;
 	struct arm_pmu *cpu_pmu = probe->pmu;
-	u64 dfr0;
 	u64 pmceid_raw[2];
 	u32 pmceid[2];
 	int pmuver;
 
-	dfr0 = read_sysreg(id_aa64dfr0_el1);
-	pmuver = cpuid_feature_extract_unsigned_field(dfr0,
-			ID_AA64DFR0_PMUVER_SHIFT);
+	pmuver = armv8pmu_get_pmu_version();
 	if (pmuver == 0xf || pmuver == 0)
 		return;
 
@@ -994,7 +1036,8 @@ static int armv8pmu_probe_pmu(struct arm_pmu *cpu_pmu)
 static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name,
 			  int (*map_event)(struct perf_event *event),
 			  const struct attribute_group *events,
-			  const struct attribute_group *format)
+			  const struct attribute_group *format,
+			  const struct attribute_group *caps)
 {
 	int ret = armv8pmu_probe_pmu(cpu_pmu);
 	if (ret)
@@ -1019,6 +1062,8 @@ static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name,
 			events : &armv8_pmuv3_events_attr_group;
 	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] = format ?
 			format : &armv8_pmuv3_format_attr_group;
+	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_CAPS] = caps ?
+			caps : &armv8_pmuv3_caps_attr_group;
 
 	return 0;
 }
@@ -1026,97 +1071,97 @@ static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name,
 static int armv8_pmuv3_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_pmuv3",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a34_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a34",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a35_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a35",
-			      armv8_a53_map_event, NULL, NULL);
+			      armv8_a53_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a53_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a53",
-			      armv8_a53_map_event, NULL, NULL);
+			      armv8_a53_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a55_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a55",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a57",
-			      armv8_a57_map_event, NULL, NULL);
+			      armv8_a57_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a65_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a65",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a72_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a72",
-			      armv8_a57_map_event, NULL, NULL);
+			      armv8_a57_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a73_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a73",
-			      armv8_a73_map_event, NULL, NULL);
+			      armv8_a73_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a75_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a75",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a76_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a76",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_a77_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a77",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_e1_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_neoverse_e1",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_n1_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_neoverse_n1",
-			      armv8_pmuv3_map_event, NULL, NULL);
+			      armv8_pmuv3_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_thunder_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_cavium_thunder",
-			      armv8_thunder_map_event, NULL, NULL);
+			      armv8_thunder_map_event, NULL, NULL, NULL);
 }
 
 static int armv8_vulcan_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return armv8_pmu_init(cpu_pmu, "armv8_brcm_vulcan",
-			      armv8_vulcan_map_event, NULL, NULL);
+			      armv8_vulcan_map_event, NULL, NULL, NULL);
 }
 
 static const struct of_device_id armv8_pmu_of_device_ids[] = {
diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
index 5b616dde9a4c..1e129b57d51a 100644
--- a/include/linux/perf/arm_pmu.h
+++ b/include/linux/perf/arm_pmu.h
@@ -73,6 +73,7 @@ enum armpmu_attr_groups {
 	ARMPMU_ATTR_GROUP_COMMON,
 	ARMPMU_ATTR_GROUP_EVENTS,
 	ARMPMU_ATTR_GROUP_FORMATS,
+	ARMPMU_ATTR_GROUP_CAPS,
 	ARMPMU_NR_ATTR_GROUPS
 };
 
