diff --git a/src/include/kernel/ext_manifest.h b/src/include/kernel/ext_manifest.h
index 521119ca00fc..bec0644089bc 100644
--- a/src/include/kernel/ext_manifest.h
+++ b/src/include/kernel/ext_manifest.h
@@ -51,8 +51,21 @@ enum ext_man_elem_type {
 	EXT_MAN_ELEM_CC_VERSION		= SOF_IPC_EXT_CC_INFO,
 	EXT_MAN_ELEM_PROBE_INFO		= SOF_IPC_EXT_PROBE_INFO,
 	EXT_MAN_ELEM_DBG_ABI		= SOF_IPC_EXT_USER_ABI_INFO,
+	EXT_MAN_ELEM_CONFIG_DATA	= 5,
+	EXT_MAN_ELEM_PLATFORM_CONFIG_DATA = 6,
 };
 
+/* EXT_MAN_ELEM_CONFIG_DATA elements identificators */
+enum config_elem_type {
+	EXT_MAN_CONFIG_IPC_MSG_SIZE	= 1,
+	EXT_MAN_CONFIG_LAST_ELEM,	/**< keep it at the end of enum list */
+};
+
+struct config_elem {
+	uint32_t token;
+	uint32_t value;
+} __packed;
+
 /* FW version */
 struct ext_man_fw_version {
 	struct ext_man_elem_header hdr;
@@ -87,4 +100,11 @@ struct ext_man_dbg_abi {
 	struct sof_ipc_user_abi_version dbg_abi;
 } __packed;
 
+/* EXT_MAN_ELEM_CONFIG_DATA elements */
+struct ext_man_config_data {
+	struct ext_man_elem_header hdr;
+
+	struct config_elem elems[EXT_MAN_CONFIG_LAST_ELEM];
+} __packed;
+
 #endif /* __KERNEL_EXT_MANIFEST_H__ */
diff --git a/src/init/ext_manifest.c b/src/init/ext_manifest.c
index 7a95d4143969..4e1453c67cd3 100644
--- a/src/init/ext_manifest.c
+++ b/src/init/ext_manifest.c
@@ -83,3 +83,13 @@ const struct ext_man_dbg_abi ext_man_dbg_info
 		.abi_dbg_version = SOF_ABI_DBG_VERSION,
 	},
 };
+
+const struct ext_man_config_data ext_man_config
+	__aligned(EXT_MAN_ALIGN) __section(".fw_metadata") = {
+	.hdr.type = EXT_MAN_ELEM_CONFIG_DATA,
+	.hdr.elem_size = ALIGN_UP(sizeof(struct ext_man_config_data),
+				  EXT_MAN_ALIGN),
+	.elems = {
+		{EXT_MAN_CONFIG_IPC_MSG_SIZE, SOF_IPC_MSG_MAX_SIZE},
+	},
+};
diff --git a/src/platform/intel/cavs/CMakeLists.txt b/src/platform/intel/cavs/CMakeLists.txt
index d6eb2ca44961..cdfc1619a53e 100644
--- a/src/platform/intel/cavs/CMakeLists.txt
+++ b/src/platform/intel/cavs/CMakeLists.txt
@@ -28,3 +28,10 @@ endif()
 add_local_sources(sof platform.c)
 
 target_include_directories(sof_options INTERFACE ${PROJECT_SOURCE_DIR}/src/platform/intel/cavs/include)
+
+add_library(cavs_ext_manifest STATIC "")
+add_local_sources(cavs_ext_manifest ext_manifest.c)
+sof_append_relative_path_definitions(cavs_ext_manifest)
+
+target_link_libraries(cavs_ext_manifest sof_options)
+target_link_libraries(sof_static_libraries INTERFACE cavs_ext_manifest)
diff --git a/src/platform/intel/cavs/ext_manifest.c b/src/platform/intel/cavs/ext_manifest.c
new file mode 100644
index 000000000000..65b7f6b1bec1
--- /dev/null
+++ b/src/platform/intel/cavs/ext_manifest.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright(c) 2020 Intel Corporation. All rights reserved.
+//
+// Author: Adrian Bonislawski <adrian.bonislawski@linux.intel.com>
+//
+
+#include <cavs/ext_manifest.h>
+#include <kernel/ext_manifest.h>
+#include <sof/common.h>
+#include <sof/lib/memory.h>
+
+const struct ext_man_cavs_config_data ext_man_cavs_config
+	__aligned(EXT_MAN_ALIGN) __section(".fw_metadata") = {
+	.hdr.type = EXT_MAN_ELEM_PLATFORM_CONFIG_DATA,
+	.hdr.elem_size = ALIGN_UP(sizeof(struct ext_man_cavs_config_data),
+				  EXT_MAN_ALIGN),
+	.elems = {
+#if CONFIG_CAVS_LPRO
+		{EXT_MAN_CAVS_CONFIG_LPRO,  CONFIG_CAVS_LPRO},
+#endif
+		{EXT_MAN_CAVS_CONFIG_OUTBOX_SIZE, SRAM_OUTBOX_SIZE},
+		{EXT_MAN_CAVS_CONFIG_INBOX_SIZE, SRAM_INBOX_SIZE},
+	},
+};
diff --git a/src/platform/intel/cavs/include/cavs/ext_manifest.h b/src/platform/intel/cavs/include/cavs/ext_manifest.h
new file mode 100644
index 000000000000..305b29463273
--- /dev/null
+++ b/src/platform/intel/cavs/include/cavs/ext_manifest.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright(c) 2020 Intel Corporation. All rights reserved.
+ *
+ * Author: Adrian Bonislawski <adrian.bonislawski@linux.intel.com>
+ */
+
+#ifndef __CAVS_EXT_MANIFEST_H__
+#define __CAVS_EXT_MANIFEST_H__
+
+#include <kernel/ext_manifest.h>
+
+/* EXT_MAN_ELEM_PLATFORM_CONFIG_DATA elements identificators */
+enum cavs_config_elem_type {
+	EXT_MAN_CAVS_CONFIG_LPRO	= 1,
+	EXT_MAN_CAVS_CONFIG_OUTBOX_SIZE,
+	EXT_MAN_CAVS_CONFIG_INBOX_SIZE,
+	EXT_MAN_CAVS_CONFIG_LAST_ELEM,	/**< keep it at the end of enum list */
+};
+
+/* EXT_MAN_ELEM_PLATFORM_CONFIG_DATA elements */
+struct ext_man_cavs_config_data {
+	struct ext_man_elem_header hdr;
+
+	struct config_elem elems[EXT_MAN_CAVS_CONFIG_LAST_ELEM];
+} __packed;
+
+#endif /* __KERNEL_EXT_MANIFEST_H__ */