diff --git a/src/drivers/intel/cavs/ipc.c b/src/drivers/intel/cavs/ipc.c
index 0435dc02152f..67528d6748b4 100644
--- a/src/drivers/intel/cavs/ipc.c
+++ b/src/drivers/intel/cavs/ipc.c
@@ -200,9 +200,10 @@ enum task_state ipc_platform_do_cmd(void *data)
 
 void ipc_platform_complete_cmd(void *data)
 {
-#if CONFIG_SUECREEK
 	struct ipc *ipc = data;
-#endif
+
+	if (!cpu_is_me(ipc->core))
+		return;
 
 	/* write 1 to clear busy, and trigger interrupt to host*/
 #if CAVS_VERSION == CAVS_VERSION_1_5
diff --git a/src/idc/idc.c b/src/idc/idc.c
index 3ec1274f4405..582e6813bc06 100644
--- a/src/idc/idc.c
+++ b/src/idc/idc.c
@@ -7,6 +7,7 @@
 #include <sof/audio/component.h>
 #include <sof/audio/component_ext.h>
 #include <sof/drivers/idc.h>
+#include <sof/ipc/driver.h>
 #include <sof/ipc/msg.h>
 #include <sof/ipc/topology.h>
 #include <sof/ipc/schedule.h>
@@ -120,9 +121,11 @@ int idc_wait_in_blocking_mode(uint32_t target_core, bool (*cond)(int))
 static void idc_ipc(void)
 {
 	struct ipc *ipc = ipc_get();
-	ipc_cmd_hdr *hdr = ipc->comp_data;
 
-	ipc_cmd(hdr);
+	ipc_cmd(ipc->comp_data);
+
+	/* Signal the host */
+	ipc_platform_complete_cmd(ipc);
 }
 
 /**
diff --git a/src/include/sof/ipc/common.h b/src/include/sof/ipc/common.h
index 33a7dcdcb518..a53010a02f69 100644
--- a/src/include/sof/ipc/common.h
+++ b/src/include/sof/ipc/common.h
@@ -68,6 +68,7 @@ struct ipc {
 
 	struct list_item msg_list;	/* queue of messages to be sent */
 	bool is_notification_pending;	/* notification is being sent to host */
+	unsigned int core;		/* core, processing the IPC */
 
 	struct list_item comp_list;	/* list of component devices */
 
@@ -190,8 +191,9 @@ void ipc_cmd(ipc_cmd_hdr *hdr);
 /**
  * \brief IPC message to be processed on other core.
  * @param[in] core Core id for IPC to be processed on.
+ * @param[in] blocking Process in blocking mode: wait for completion.
  * @return 1 if successful (reply sent by other core), error code otherwise.
  */
-int ipc_process_on_core(uint32_t core);
+int ipc_process_on_core(uint32_t core, bool blocking);
 
 #endif /* __SOF_DRIVERS_IPC_H__ */
diff --git a/src/ipc/ipc-common.c b/src/ipc/ipc-common.c
index 4e7386c78a30..f88412558a37 100644
--- a/src/ipc/ipc-common.c
+++ b/src/ipc/ipc-common.c
@@ -38,8 +38,9 @@ DECLARE_SOF_UUID("ipc", ipc_uuid, 0xbe60f97d, 0x78df, 0x4796,
 
 DECLARE_TR_CTX(ipc_tr, SOF_UUID(ipc_uuid), LOG_LEVEL_INFO);
 
-int ipc_process_on_core(uint32_t core)
+int ipc_process_on_core(uint32_t core, bool blocking)
 {
+	struct ipc *ipc = ipc_get();
 	struct idc_msg msg = { .header = IDC_MSG_IPC, .core = core, };
 	int ret;
 
@@ -49,8 +50,19 @@ int ipc_process_on_core(uint32_t core)
 		return -EACCES;
 	}
 
+	/* The other core will write there its response */
+	dcache_invalidate_region((void *)MAILBOX_HOSTBOX_BASE,
+				 ((struct sof_ipc_cmd_hdr *)ipc->comp_data)->size);
+
+	/*
+	 * If the primary core is waiting for secondary cores to complete, it
+	 * will also reply to the host
+	 */
+	if (!blocking)
+		ipc->core = core;
+
 	/* send IDC message */
-	ret = idc_send_msg(&msg, IDC_BLOCKING);
+	ret = idc_send_msg(&msg, blocking ? IDC_BLOCKING : IDC_NON_BLOCKING);
 	if (ret < 0)
 		return ret;
 
diff --git a/src/ipc/ipc3/dai.c b/src/ipc/ipc3/dai.c
index c4403c465760..8dfa2929182e 100644
--- a/src/ipc/ipc3/dai.c
+++ b/src/ipc/ipc3/dai.c
@@ -191,17 +191,27 @@ int ipc_comp_dai_config(struct ipc *ipc, struct ipc_config_dai *common_config,
 			if (!comp_on_core[i])
 				continue;
 
-			ret = ipc_process_on_core(i);
+			/*
+			 * TODO: can secondary cores execute dai_config() in
+			 * parallel? Then we could just wait for the last of
+			 * them. For now execute them sequentially.
+			 */
+			ret = ipc_process_on_core(i, true);
 			if (ret < 0)
-				return ret;
+				break;
 
 			/* check whether IPC failed on secondary core */
 			mailbox_hostbox_read(&reply, sizeof(reply), 0,
 					     sizeof(reply));
-			if (reply.error < 0)
+			if (reply.error < 0) {
 				/* error reply already written */
-				return 1;
+				ret = 1;
+				break;
+			}
 		}
+
+		/* We have waited until all secondary cores configured their DAIs */
+		ipc->core = PLATFORM_PRIMARY_CORE_ID;
 	}
 
 	return ret;
diff --git a/src/ipc/ipc3/handler.c b/src/ipc/ipc3/handler.c
index c5d1c034e7cd..a2fbabb4c828 100644
--- a/src/ipc/ipc3/handler.c
+++ b/src/ipc/ipc3/handler.c
@@ -207,7 +207,7 @@ static int ipc_stream_pcm_params(uint32_t stream)
 
 	/* check core */
 	if (!cpu_is_me(pcm_dev->core))
-		return ipc_process_on_core(pcm_dev->core);
+		return ipc_process_on_core(pcm_dev->core, false);
 
 	tr_dbg(&ipc_tr, "ipc: comp %d -> params", pcm_params.comp_id);
 
@@ -319,7 +319,7 @@ static int ipc_stream_pcm_free(uint32_t header)
 
 	/* check core */
 	if (!cpu_is_me(pcm_dev->core))
-		return ipc_process_on_core(pcm_dev->core);
+		return ipc_process_on_core(pcm_dev->core, false);
 
 	tr_dbg(&ipc_tr, "ipc: comp %d -> free", free_req.comp_id);
 
@@ -356,7 +356,7 @@ static int ipc_stream_position(uint32_t header)
 
 	/* check core */
 	if (!cpu_is_me(pcm_dev->core))
-		return ipc_process_on_core(pcm_dev->core);
+		return ipc_process_on_core(pcm_dev->core, false);
 
 	tr_info(&ipc_tr, "ipc: comp %d -> position", stream.comp_id);
 
@@ -405,7 +405,7 @@ static int ipc_stream_trigger(uint32_t header)
 
 	/* check core */
 	if (!cpu_is_me(pcm_dev->core))
-		return ipc_process_on_core(pcm_dev->core);
+		return ipc_process_on_core(pcm_dev->core, false);
 
 	tr_dbg(&ipc_tr, "ipc: comp %d -> trigger cmd 0x%x",
 	       stream.comp_id, ipc_command);
@@ -1109,7 +1109,7 @@ static int ipc_comp_value(uint32_t header, uint32_t cmd)
 
 	/* check core */
 	if (!cpu_is_me(comp_dev->core))
-		return ipc_process_on_core(comp_dev->core);
+		return ipc_process_on_core(comp_dev->core, false);
 
 	tr_dbg(&ipc_tr, "ipc: comp %d -> cmd %d", data->comp_id, data->cmd);
 
@@ -1169,7 +1169,7 @@ static int ipc_glb_tplg_comp_new(uint32_t header)
 
 	/* check core */
 	if (!cpu_is_me(comp->core))
-		return ipc_process_on_core(comp->core);
+		return ipc_process_on_core(comp->core, false);
 
 	tr_dbg(&ipc_tr, "ipc: pipe %d comp %d -> new (type %d)",
 	       comp->pipeline_id, comp->id, comp->type);
@@ -1205,7 +1205,7 @@ static int ipc_glb_tplg_buffer_new(uint32_t header)
 
 	/* check core */
 	if (!cpu_is_me(ipc_buffer.comp.core))
-		return ipc_process_on_core(ipc_buffer.comp.core);
+		return ipc_process_on_core(ipc_buffer.comp.core, false);
 
 	tr_dbg(&ipc_tr, "ipc: pipe %d buffer %d -> new (0x%x bytes)",
 	       ipc_buffer.comp.pipeline_id, ipc_buffer.comp.id,
@@ -1242,7 +1242,7 @@ static int ipc_glb_tplg_pipe_new(uint32_t header)
 
 	/* check core */
 	if (!cpu_is_me(ipc_pipeline.core))
-		return ipc_process_on_core(ipc_pipeline.core);
+		return ipc_process_on_core(ipc_pipeline.core, false);
 
 	tr_dbg(&ipc_tr, "ipc: pipe %d -> new", ipc_pipeline.pipeline_id);
 
@@ -1495,6 +1495,7 @@ void ipc_boot_complete_msg(ipc_cmd_hdr *header, uint32_t *data)
 void ipc_cmd(ipc_cmd_hdr *_hdr)
 {
 	struct sof_ipc_cmd_hdr *hdr = ipc_from_hdr(_hdr);
+	struct ipc *ipc = ipc_get();
 	struct sof_ipc_reply reply;
 	uint32_t type = 0;
 	int ret;
@@ -1505,6 +1506,10 @@ void ipc_cmd(ipc_cmd_hdr *_hdr)
 		goto out;
 	}
 
+	if (!cpu_is_secondary(cpu_get_id()))
+		/* A new IPC from the host, delivered to the primary core */
+		ipc->core = PLATFORM_PRIMARY_CORE_ID;
+
 	type = iGS(hdr->cmd);
 
 	switch (type) {
diff --git a/src/ipc/ipc3/helper.c b/src/ipc/ipc3/helper.c
index 0e2008129e84..a32c1402f14d 100644
--- a/src/ipc/ipc3/helper.c
+++ b/src/ipc/ipc3/helper.c
@@ -513,7 +513,7 @@ int ipc_pipeline_free(struct ipc *ipc, uint32_t comp_id)
 
 	/* check core */
 	if (!cpu_is_me(ipc_pipe->core))
-		return ipc_process_on_core(ipc_pipe->core);
+		return ipc_process_on_core(ipc_pipe->core, false);
 
 	/* free buffer and remove from list */
 	ret = pipeline_free(ipc_pipe->pipeline);
@@ -548,7 +548,7 @@ int ipc_pipeline_complete(struct ipc *ipc, uint32_t comp_id)
 
 	/* check core */
 	if (!cpu_is_me(ipc_pipe->core))
-		return ipc_process_on_core(ipc_pipe->core);
+		return ipc_process_on_core(ipc_pipe->core, false);
 
 	p = ipc_pipe->pipeline;
 
@@ -653,7 +653,7 @@ int ipc_buffer_free(struct ipc *ipc, uint32_t buffer_id)
 
 	/* check core */
 	if (!cpu_is_me(ibd->core))
-		return ipc_process_on_core(ibd->core);
+		return ipc_process_on_core(ibd->core, false);
 
 	/* try to find sink/source components to check if they still exists */
 	list_for_item(clist, &ipc->comp_list) {
@@ -707,7 +707,7 @@ static int ipc_comp_to_buffer_connect(struct ipc_comp_dev *comp,
 	int ret;
 
 	if (!cpu_is_me(comp->core))
-		return ipc_process_on_core(comp->core);
+		return ipc_process_on_core(comp->core, false);
 
 	tr_dbg(&ipc_tr, "ipc: comp sink %d, source %d  -> connect", buffer->id,
 	       comp->id);
@@ -739,7 +739,7 @@ static int ipc_buffer_to_comp_connect(struct ipc_comp_dev *buffer,
 	int ret;
 
 	if (!cpu_is_me(comp->core))
-		return ipc_process_on_core(comp->core);
+		return ipc_process_on_core(comp->core, false);
 
 	tr_dbg(&ipc_tr, "ipc: comp sink %d, source %d  -> connect", comp->id,
 	       buffer->id);
@@ -856,7 +856,7 @@ int ipc_comp_free(struct ipc *ipc, uint32_t comp_id)
 
 	/* check core */
 	if (!cpu_is_me(icd->core))
-		return ipc_process_on_core(icd->core);
+		return ipc_process_on_core(icd->core, false);
 
 	/* check state */
 	if (icd->cd->state != COMP_STATE_READY)