diff --git a/soc/intel/intel_adsp/ace/power.c b/soc/intel/intel_adsp/ace/power.c
index 0d75100fab3e739..a8abf9d1bf97469 100644
--- a/soc/intel/intel_adsp/ace/power.c
+++ b/soc/intel/intel_adsp/ace/power.c
@@ -339,16 +339,18 @@ void pm_state_set(enum pm_state state, uint8_t substate_id)
 					(void *)rom_entry;
 			sys_cache_data_flush_range((void *)imr_layout, sizeof(*imr_layout));
 #endif /* CONFIG_ADSP_IMR_CONTEXT_SAVE */
-			uint32_t hpsram_mask = 0;
+			const int dcache_words = XCHAL_DCACHE_LINESIZE / 4;
+			__aligned(XCHAL_DCACHE_LINESIZE) uint32_t hpsram_mask[dcache_words];
+			hpsram_mask[0] = 0;
 #ifdef CONFIG_ADSP_POWER_DOWN_HPSRAM
 			/* turn off all HPSRAM banks - get a full bitmap */
 			uint32_t ebb_banks = ace_hpsram_get_bank_count();
-			hpsram_mask = (1 << ebb_banks) - 1;
+			hpsram_mask[0] = (1 << ebb_banks) - 1;
 #endif /* CONFIG_ADSP_POWER_DOWN_HPSRAM */
-			/* do power down - this function won't return */
 			ret = pm_device_runtime_put(INTEL_ADSP_HST_DOMAIN_DEV);
 			__ASSERT_NO_MSG(ret == 0);
-			power_down(true, sys_cache_cached_ptr_get(&hpsram_mask),
+			/* do power down - this function won't return */
+			power_down(true, sys_cache_cached_ptr_get(&hpsram_mask[0]),
 				   true);
 		} else {
 			power_gate_entry(cpu);