diff --git a/include/drivers/partition/efi.h b/include/drivers/partition/efi.h
index 6d5466f31be..882ab0b7539 100644
--- a/include/drivers/partition/efi.h
+++ b/include/drivers/partition/efi.h
@@ -43,6 +43,14 @@ static inline void *guidcpy(void *dst, const void *src)
 	EFI_GUID(0xF469F981U, 0x5985U, 0x4206U, \
 		 0x8FU, 0xB3U, 0x83U, 0x99U, 0x56U, 0x03U, 0x5AU, 0x65U)
 
+#define LINUX_FILE_SYSTEM_DATA_GUID \
+	EFI_GUID(0x0FC63DAFU, 0x8483U, 0x4772U, \
+		 0x8EU, 0x79U, 0x3DU, 0x69U, 0xD8U, 0x47U, 0x7DU, 0xE4U)
+
+#define XBOOTLDR_GUID \
+	EFI_GUID(0xBC13C2FFU, 0x59E6U, 0x4262U, \
+		 0xA3U, 0x52U, 0xB2U, 0x75U, 0xFDU, 0x6FU, 0x71U, 0x72U)
+
 #define NULL_GUID \
 	EFI_GUID(0x00000000U, 0x0000U, 0x0000U, 0x00U, 0x00U, \
 		 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U)
diff --git a/plat/st/common/stm32mp_fconf_io.c b/plat/st/common/stm32mp_fconf_io.c
index e12eded81fc..e7d5115bb6f 100644
--- a/plat/st/common/stm32mp_fconf_io.c
+++ b/plat/st/common/stm32mp_fconf_io.c
@@ -32,6 +32,14 @@ static io_block_spec_t metadata_block_spec = {
 	.offset = 0,    /* To be filled at runtime */
 	.length = 0,    /* To be filled at runtime */
 };
+static io_block_spec_t bootfs_block_spec = {
+	.offset = 0,    /* To be filled at runtime */
+	.length = 0,    /* To be filled at runtime */
+};
+static io_block_spec_t rootfs_block_spec = {
+	.offset = 0,    /* To be filled at runtime */
+	.length = 0,    /* To be filled at runtime */
+};
 #endif
 
 /* By default, STM32 platforms load images from the FIP */
@@ -71,6 +79,18 @@ struct plat_io_policy policies[MAX_NUMBER_IDS] = {
 		.img_type_guid = NULL_GUID,
 		.check = open_storage
 	},
+	[FWU_BOOTFS_ID] = {
+		.dev_handle = &storage_dev_handle,
+		.image_spec = (uintptr_t)&bootfs_block_spec,
+		.img_type_guid = XBOOTLDR_GUID,
+		.check = open_storage
+	},
+	[FWU_ROOTFS_ID] = {
+		.dev_handle = &storage_dev_handle,
+		.image_spec = (uintptr_t)&rootfs_block_spec,
+		.img_type_guid = LINUX_FILE_SYSTEM_DATA_GUID,
+		.check = open_storage
+	},
 #endif /* PSA_FWU_SUPPORT */
 };
 
diff --git a/plat/st/stm32mp1/include/plat_tbbr_img_def.h b/plat/st/stm32mp1/include/plat_tbbr_img_def.h
index 984aae85b2a..84a3b1ad011 100644
--- a/plat/st/stm32mp1/include/plat_tbbr_img_def.h
+++ b/plat/st/stm32mp1/include/plat_tbbr_img_def.h
@@ -33,8 +33,10 @@
 #define BKUP_FWU_METADATA_IMAGE_ID	U(13)
 #define TOS_FW_CONFIG_ID		U(16)
 #define STM32MP_CONFIG_CERT_ID		U(17)
+#define FWU_BOOTFS_ID			U(27)
+#define FWU_ROOTFS_ID			U(28)
 
 /* Increase the MAX_NUMBER_IDS to match the authentication pool required */
-#define MAX_NUMBER_IDS			U(19)
+#define MAX_NUMBER_IDS			U(29)
 
 #endif	/* STM32MP1_IMG_DEF_H */
diff --git a/plat/st/stm32mp2/include/plat_tbbr_img_def.h b/plat/st/stm32mp2/include/plat_tbbr_img_def.h
index e786dd2b12b..ca4720cdfc0 100644
--- a/plat/st/stm32mp2/include/plat_tbbr_img_def.h
+++ b/plat/st/stm32mp2/include/plat_tbbr_img_def.h
@@ -42,12 +42,16 @@
 
 #if STM32MP_DDR_FIP_IO_STORAGE
 #define DDR_FW_ID			U(26)
+#define FWU_BOOTFS_ID			U(27)
+#define FWU_ROOTFS_ID			U(28)
 /* Increase the MAX_NUMBER_IDS to match the authentication pool required */
-#define MAX_NUMBER_IDS			U(27)
+#define MAX_NUMBER_IDS			U(29)
 
 #else
 /* Increase the MAX_NUMBER_IDS to match the authentication pool required */
-#define MAX_NUMBER_IDS			U(26)
+#define FWU_BOOTFS_ID			U(26)
+#define FWU_ROOTFS_ID			U(27)
+#define MAX_NUMBER_IDS			U(28)
 
 #endif