diff --git a/include/drivers/arm/css/dsu.h b/include/drivers/arm/css/dsu.h
new file mode 100644
index 0000000..4d7822b
--- /dev/null
+++ b/include/drivers/arm/css/dsu.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2024, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef DSU_H
+#define DSU_H
+
+#define PMCR_N_MAX			0x1f
+
+#define save_pmu_reg(state, reg) state->reg = read_##reg()
+
+#define restore_pmu_reg(context, reg) write_##reg(context->reg)
+
+typedef struct cluster_pmu_state{
+	uint64_t clusterpmcr;
+	uint64_t clusterpmcntenset;
+	uint64_t clusterpmccntr;
+	uint64_t clusterpmovsset;
+	uint64_t clusterpmselr;
+	uint64_t clusterpmsevtyper;
+	uint64_t counter_val[PMCR_N_MAX];
+	uint64_t counter_type[PMCR_N_MAX];
+} cluster_pmu_state_t;
+
+static inline unsigned int read_cluster_eventctr_num(void)
+{
+	return ((read_clusterpmcr() >> CLUSTERPMCR_N_SHIFT) &
+			CLUSTERPMCR_N_MASK);
+}
+
+
+void save_dsu_pmu_state(cluster_pmu_state_t *cluster_pmu_context);
+
+void restore_dsu_pmu_state(cluster_pmu_state_t *cluster_pmu_context);
+
+void cluster_on_dsu_pmu_context_restore(void);
+
+void cluster_off_dsu_pmu_context_save(void);
+
+#endif /* DSU_H */