diff --git a/src/include/sof/ipc/msg.h b/src/include/sof/ipc/msg.h
index a24fa3711ad0..20dfaf6eb519 100644
--- a/src/include/sof/ipc/msg.h
+++ b/src/include/sof/ipc/msg.h
@@ -35,6 +35,7 @@ struct ipc_msg {
 	uint32_t extension;	/* extension specific to platform */
 	uint32_t tx_size;	/* payload size in bytes */
 	void *tx_data;		/* pointer to payload data */
+	bool is_shared;		/* the message is shared cross-core */
 	struct list_item list;
 };
 
diff --git a/src/ipc/ipc-common.c b/src/ipc/ipc-common.c
index bf94e0481ec0..7714a4650150 100644
--- a/src/ipc/ipc-common.c
+++ b/src/ipc/ipc-common.c
@@ -214,6 +214,15 @@ void ipc_msg_send(struct ipc_msg *msg, void *data, bool high_priority)
 	    msg->tx_data != data) {
 		ret = memcpy_s(msg->tx_data, msg->tx_size, data, msg->tx_size);
 		assert(!ret);
+		if (!cpu_is_primary(cpu_get_id())) {
+			/* Write back data to memory to maintain coherence between cores.
+			 * The response was prepared on a secondary core but will be sent
+			 * to the host from the primary core.
+			 */
+			dcache_writeback_region((__sparse_force void __sparse_cache *)msg->tx_data,
+						msg->tx_size);
+			msg->is_shared = true;
+		}
 	}
 
 	/*
diff --git a/src/ipc/ipc4/handler.c b/src/ipc/ipc4/handler.c
index 3d7e82645a4f..6645d6fd08e5 100644
--- a/src/ipc/ipc4/handler.c
+++ b/src/ipc/ipc4/handler.c
@@ -72,9 +72,9 @@ struct ipc4_msg_data {
 static struct ipc4_msg_data msg_data;
 
 /* fw sends a fw ipc message to send the status of the last host ipc message */
-static struct ipc_msg msg_reply = {0, 0, 0, 0, LIST_INIT(msg_reply.list)};
+static struct ipc_msg msg_reply = {0, 0, 0, 0, false, LIST_INIT(msg_reply.list)};
 
-static struct ipc_msg msg_notify = {0, 0, 0, 0, LIST_INIT(msg_notify.list)};
+static struct ipc_msg msg_notify = {0, 0, 0, 0, false, LIST_INIT(msg_notify.list)};
 
 #if CONFIG_LIBRARY
 static inline struct ipc4_message_request *ipc4_get_message_request(void)
@@ -1494,14 +1494,25 @@ struct ipc_cmd_hdr *ipc_prepare_to_send(const struct ipc_msg *msg)
 	msg_data.msg_out.pri = msg->header;
 	msg_data.msg_out.ext = msg->extension;
 
-	if (msg->tx_size)
+	if (msg->tx_size) {
+		/* Invalidate cache to ensure we read the latest data from memory.
+		 * The response was prepared on a secondary core but will be sent
+		 * to the host from the primary core.
+		 */
+		if (msg->is_shared) {
+			dcache_invalidate_region((__sparse_force void __sparse_cache *)msg->tx_data,
+						 msg->tx_size);
+		}
+
 		mailbox_dspbox_write(0, (uint32_t *)msg->tx_data, msg->tx_size);
+	}
 
 	/* free memory for get config function */
 	if (msg == &msg_reply && msg_reply.tx_size > 0) {
 		rfree(msg_reply.tx_data);
 		msg_reply.tx_data = NULL;
 		msg_reply.tx_size = 0;
+		msg_reply.is_shared = false;
 	}
 
 	return &msg_data.msg_out;
@@ -1535,6 +1546,7 @@ void ipc_send_panic_notification(void)
 {
 	msg_notify.header = SOF_IPC4_NOTIF_HEADER(SOF_IPC4_EXCEPTION_CAUGHT);
 	msg_notify.extension = cpu_get_id();
+	msg_notify.is_shared = !cpu_is_primary(cpu_get_id());
 	msg_notify.tx_size = 0;
 	msg_notify.tx_data = NULL;
 	list_init(&msg_notify.list);
@@ -1567,6 +1579,7 @@ void ipc_send_buffer_status_notify(void)
 	msg_notify.header = SOF_IPC4_NOTIF_HEADER(SOF_IPC4_NOTIFY_LOG_BUFFER_STATUS);
 	msg_notify.extension = 0;
 	msg_notify.tx_size = 0;
+	msg_notify.is_shared = false;
 
 	tr_dbg(&ipc_tr, "tx-notify\t: %#x|%#x", msg_notify.header, msg_notify.extension);
 
diff --git a/src/library_manager/lib_notification.c b/src/library_manager/lib_notification.c
index 29ca2de2a951..f76fc05942b1 100644
--- a/src/library_manager/lib_notification.c
+++ b/src/library_manager/lib_notification.c
@@ -73,6 +73,7 @@ struct ipc_msg *lib_notif_msg_init(uint32_t header, uint32_t size)
 	/* Update header and size, since message handle can be reused */
 	msg->header = header;
 	msg->tx_size = size;
+	msg->is_shared = !cpu_is_primary(cpu_get_id());
 	return msg;
 }