diff --git a/include/ipc/rpmsg_multi_instance.h b/include/ipc/rpmsg_multi_instance.h
index f5257077fc2..3658ca07afe 100644
--- a/include/ipc/rpmsg_multi_instance.h
+++ b/include/ipc/rpmsg_multi_instance.h
@@ -96,6 +96,8 @@ struct rpmsg_mi_ctx {
 	const struct device *ipm_tx_handle;
 	const struct device *ipm_rx_handle;
 
+	unsigned int ipm_tx_id;
+
 	uint32_t shm_status_reg_addr;
 	struct metal_io_region *shm_io;
 	struct metal_device shm_device;
@@ -121,6 +123,12 @@ struct rpmsg_mi_ctx_cfg {
 	/** Name of instance. */
 	const char *name;
 
+	/** Physical address shared memory region. */
+	uintptr_t shm_addr;
+
+	/** Size shared memory region. */
+	size_t shm_size;
+
 	/** Stack area for k_work_q. */
 	k_thread_stack_t *ipm_stack_area;
 
@@ -138,6 +146,9 @@ struct rpmsg_mi_ctx_cfg {
 
 	/** Name of the RX IPM channel. */
 	const char *ipm_rx_name;
+
+	/** IPM message identifier. */
+	unsigned int ipm_tx_id;
 };
 
 /** @brief Initialization of RPMsg instance.
diff --git a/samples/subsys/ipc/rpmsg_multi_instance/remote/src/main.c b/samples/subsys/ipc/rpmsg_multi_instance/remote/src/main.c
index e80f60bb1cd..78579243d51 100644
--- a/samples/subsys/ipc/rpmsg_multi_instance/remote/src/main.c
+++ b/samples/subsys/ipc/rpmsg_multi_instance/remote/src/main.c
@@ -18,6 +18,8 @@
 #define IPM_WORK_QUEUE_STACK_SIZE  1024
 #define APP_TASK_STACK_SIZE        1024
 
+#define IPM_MSG_ID                 0
+
 K_THREAD_STACK_DEFINE(ipm_stack_area_1, IPM_WORK_QUEUE_STACK_SIZE);
 K_THREAD_STACK_DEFINE(ipm_stack_area_2, IPM_WORK_QUEUE_STACK_SIZE);
 
@@ -72,6 +74,9 @@ static const struct rpmsg_mi_ctx_cfg cfg_1 = {
 	.ipm_work_q_prio    = 0,
 	.ipm_tx_name        = CONFIG_RPMSG_MULTI_INSTANCE_0_IPM_TX_NAME,
 	.ipm_rx_name        = CONFIG_RPMSG_MULTI_INSTANCE_0_IPM_RX_NAME,
+	.ipm_tx_id          = IPM_MSG_ID,
+	.shm_addr           = SHM_START_ADDR,
+	.shm_size           = SHM_SIZE,
 };
 
 static const struct rpmsg_mi_ctx_cfg cfg_2 = {
@@ -82,6 +87,9 @@ static const struct rpmsg_mi_ctx_cfg cfg_2 = {
 	.ipm_work_q_prio    = 0,
 	.ipm_tx_name        = CONFIG_RPMSG_MULTI_INSTANCE_1_IPM_TX_NAME,
 	.ipm_rx_name        = CONFIG_RPMSG_MULTI_INSTANCE_1_IPM_RX_NAME,
+	.ipm_tx_id          = IPM_MSG_ID,
+	.shm_addr           = SHM_START_ADDR,
+	.shm_size           = SHM_SIZE,
 };
 
 static struct rpmsg_mi_cb cb_1 = {
diff --git a/samples/subsys/ipc/rpmsg_multi_instance/src/main.c b/samples/subsys/ipc/rpmsg_multi_instance/src/main.c
index 6f6bca4b5ed..8f386adef66 100644
--- a/samples/subsys/ipc/rpmsg_multi_instance/src/main.c
+++ b/samples/subsys/ipc/rpmsg_multi_instance/src/main.c
@@ -18,6 +18,8 @@
 #define IPM_WORK_QUEUE_STACK_SIZE  1024
 #define APP_TASK_STACK_SIZE        1024
 
+#define IPM_MSG_ID                 0
+
 K_THREAD_STACK_DEFINE(ipm_stack_area_1, IPM_WORK_QUEUE_STACK_SIZE);
 K_THREAD_STACK_DEFINE(ipm_stack_area_2, IPM_WORK_QUEUE_STACK_SIZE);
 
@@ -72,6 +74,9 @@ static const struct rpmsg_mi_ctx_cfg cfg_1 = {
 	.ipm_work_q_prio    = 0,
 	.ipm_tx_name        = CONFIG_RPMSG_MULTI_INSTANCE_0_IPM_TX_NAME,
 	.ipm_rx_name        = CONFIG_RPMSG_MULTI_INSTANCE_0_IPM_RX_NAME,
+	.ipm_tx_id          = IPM_MSG_ID,
+	.shm_addr           = SHM_START_ADDR,
+	.shm_size           = SHM_SIZE,
 };
 
 static const struct rpmsg_mi_ctx_cfg cfg_2 = {
@@ -82,6 +87,9 @@ static const struct rpmsg_mi_ctx_cfg cfg_2 = {
 	.ipm_work_q_prio    = 0,
 	.ipm_tx_name        = CONFIG_RPMSG_MULTI_INSTANCE_1_IPM_TX_NAME,
 	.ipm_rx_name        = CONFIG_RPMSG_MULTI_INSTANCE_1_IPM_RX_NAME,
+	.ipm_tx_id          = IPM_MSG_ID,
+	.shm_addr           = SHM_START_ADDR,
+	.shm_size           = SHM_SIZE,
 };
 
 static struct rpmsg_mi_cb cb_1 = {
diff --git a/subsys/ipc/ipc_service/backends/ipc_rpmsg_multi_instance.c b/subsys/ipc/ipc_service/backends/ipc_rpmsg_multi_instance.c
index f18abccd293..cb5c346c11a 100644
--- a/subsys/ipc/ipc_service/backends/ipc_rpmsg_multi_instance.c
+++ b/subsys/ipc/ipc_service/backends/ipc_rpmsg_multi_instance.c
@@ -22,6 +22,7 @@ LOG_MODULE_REGISTER(ipc_rpmsg_multi_instance, CONFIG_IPC_SERVICE_LOG_LEVEL);
 
 #define PRIO_INIT_VAL		INT_MAX
 #define INSTANCE_NAME_SIZE	16
+#define IPM_MSG_ID		0
 
 #define CH_NAME(idx, sub)	(CONFIG_RPMSG_MULTI_INSTANCE_ ## idx ## _IPM_ ## sub ## _NAME)
 
@@ -136,6 +137,10 @@ static int register_ept(struct ipc_ept **ept, const struct ipc_ept_cfg *cfg)
 		ctx_cfg.ipm_thread_name = instances[i_idx].name;
 		ctx_cfg.ipm_rx_name = ipm_rx_name[i_idx];
 		ctx_cfg.ipm_tx_name = ipm_tx_name[i_idx];
+		ctx_cfg.ipm_tx_id = IPM_MSG_ID;
+
+		ctx_cfg.shm_addr = SHM_START_ADDR;
+		ctx_cfg.shm_size = SHM_SIZE;
 
 		if (rpmsg_mi_ctx_init(&instances[i_idx].ctx, &ctx_cfg) < 0) {
 			LOG_ERR("Instance initialization failed");
diff --git a/subsys/ipc/rpmsg_multi_instance/Kconfig b/subsys/ipc/rpmsg_multi_instance/Kconfig
index f957079ba21..43617de65bb 100644
--- a/subsys/ipc/rpmsg_multi_instance/Kconfig
+++ b/subsys/ipc/rpmsg_multi_instance/Kconfig
@@ -68,13 +68,6 @@ config RPMSG_MULTI_INSTANCE_INIT_PRIORITY
 	help
 	  If in doubt, do not modify this value.
 
-config IPM_MSG_ID
-	int "IPM message identifier."
-	default 0
-	help
-	  Values are constrained by ipm_max_data_size_get since many boards
-	  only allow for a subset of bits in a 32-bit register to store the ID.
-
 module = RPMSG_MULTI_INSTANCE
 module-str = RPMsg multi instance
 source "${ZEPHYR_BASE}/subsys/logging/Kconfig.template.log_config"
diff --git a/subsys/ipc/rpmsg_multi_instance/rpmsg_multi_instance.c b/subsys/ipc/rpmsg_multi_instance/rpmsg_multi_instance.c
index 82d00916a6b..46a82ae3697 100644
--- a/subsys/ipc/rpmsg_multi_instance/rpmsg_multi_instance.c
+++ b/subsys/ipc/rpmsg_multi_instance/rpmsg_multi_instance.c
@@ -17,7 +17,6 @@
 
 LOG_MODULE_REGISTER(rpmsg_multi_instance, CONFIG_RPMSG_MULTI_INSTANCE_LOG_LEVEL);
 
-static bool config_correct;
 static int instance;
 
 static void rpmsg_service_unbind(struct rpmsg_endpoint *p_ep)
@@ -67,7 +66,7 @@ static void virtio_notify(struct virtqueue *vq)
 	int status;
 
 	if (ctx) {
-		status = ipm_send(ctx->ipm_tx_handle, 0, CONFIG_IPM_MSG_ID, NULL, 0);
+		status = ipm_send(ctx->ipm_tx_handle, 0, ctx->ipm_tx_id, NULL, 0);
 		if (status != 0) {
 			LOG_WRN("Failed to notify: %d", status);
 		}
@@ -102,9 +101,11 @@ static void ipm_callback(const struct device *dev, void *context, uint32_t id, v
 
 int rpmsg_mi_configure_shm(struct rpmsg_mi_ctx *ctx, const struct rpmsg_mi_ctx_cfg *cfg)
 {
-	uint8_t vring_size = VRING_SIZE_GET(SHM_SIZE);
-	uint32_t shm_addr = SHMEM_INST_ADDR_AUTOALLOC_GET(SHM_START_ADDR, SHM_SIZE, instance);
-	uint32_t shm_size = SHMEM_INST_SIZE_AUTOALLOC_GET(SHM_SIZE);
+	uint8_t vring_size = VRING_SIZE_GET(cfg->shm_size);
+	uint32_t shm_addr = SHMEM_INST_ADDR_AUTOALLOC_GET(cfg->shm_addr,
+							  cfg->shm_size,
+							  instance);
+	uint32_t shm_size = SHMEM_INST_SIZE_AUTOALLOC_GET(cfg->shm_size);
 
 	uint32_t shm_local_start_addr = shm_addr + VDEV_STATUS_SIZE;
 	uint32_t shm_local_size = shm_size - VDEV_STATUS_SIZE;
@@ -193,10 +194,20 @@ static void ns_bind_cb(struct rpmsg_device *rdev, const char *name, uint32_t des
 	}
 }
 
+static bool rpmsg_mi_config_verify(const struct rpmsg_mi_ctx_cfg *cfg)
+{
+	if (SHMEM_INST_SIZE_AUTOALLOC_GET(cfg->shm_size) * IPC_INSTANCE_COUNT > cfg->shm_size) {
+		LOG_ERR("Not enough memory");
+		return false;
+	}
+
+	return true;
+}
+
 int rpmsg_mi_ctx_init(struct rpmsg_mi_ctx *ctx, const struct rpmsg_mi_ctx_cfg *cfg)
 {
 	struct metal_init_params metal_params = METAL_INIT_DEFAULTS;
-	uint8_t vring_size = VRING_SIZE_GET(SHM_SIZE);
+	uint8_t vring_size = VRING_SIZE_GET(cfg->shm_size);
 	struct metal_device *device;
 	int err;
 
@@ -204,7 +215,7 @@ int rpmsg_mi_ctx_init(struct rpmsg_mi_ctx *ctx, const struct rpmsg_mi_ctx_cfg *c
 		return -EINVAL;
 	}
 
-	if (!config_correct) {
+	if (!rpmsg_mi_config_verify(cfg)) {
 		return -EIO;
 	}
 
@@ -258,6 +269,8 @@ int rpmsg_mi_ctx_init(struct rpmsg_mi_ctx *ctx, const struct rpmsg_mi_ctx_cfg *c
 		return -ENODEV;
 	}
 
+	ctx->ipm_tx_id = cfg->ipm_tx_id;
+
 	ctx->ipm_rx_handle = device_get_binding(cfg->ipm_rx_name);
 	if (!ctx->ipm_rx_handle) {
 		LOG_ERR("Could not get RX IPM device handle");
@@ -367,24 +380,3 @@ int rpmsg_mi_send(struct rpmsg_mi_ept *ept, const void *data, size_t len)
 {
 	return rpmsg_send(&ept->ep, data, len);
 }
-
-static bool rpmsg_mi_config_verify(void)
-{
-	if (SHMEM_INST_SIZE_AUTOALLOC_GET(SHM_SIZE) * IPC_INSTANCE_COUNT > SHM_SIZE) {
-		LOG_ERR("Not enough memory");
-		return false;
-	}
-	return true;
-}
-
-static int rpmsg_mi_init(const struct device *dev)
-{
-	ARG_UNUSED(dev);
-
-	LOG_DBG("Initialization of RPMsg multiple instance");
-	config_correct = rpmsg_mi_config_verify();
-
-	return 0;
-}
-
-SYS_INIT(rpmsg_mi_init, POST_KERNEL, CONFIG_RPMSG_MULTI_INSTANCE_INIT_PRIORITY);