diff --git a/include/plat/common/plat_drtm.h b/include/plat/common/plat_drtm.h
index e96e71958..07545a68f 100644
--- a/include/plat/common/plat_drtm.h
+++ b/include/plat/common/plat_drtm.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Arm Limited. All rights reserved.
+ * Copyright (c) 2022-2024, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -17,7 +17,7 @@ typedef struct {
 
 typedef struct {
 	bool tpm_based_hash_support;
-	uint32_t firmware_hash_algorithm;
+	uint16_t firmware_hash_algorithm;
 } plat_drtm_tpm_features_t;
 
 typedef struct {
@@ -26,7 +26,7 @@ typedef struct {
 } __attribute__((packed)) drtm_mem_region_t;
 
 /*
- * Memory region descriptor table structure as per DRTM beta0 section 3.13
+ * Memory region descriptor table structure as per DRTM 1.0 section 3.13
  * Table 11 MEMORY_REGION_DESCRIPTOR_TABLE
  */
 typedef struct {
diff --git a/include/services/drtm_svc.h b/include/services/drtm_svc.h
index 69b314f08..f0d3c63bc 100644
--- a/include/services/drtm_svc.h
+++ b/include/services/drtm_svc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Arm Limited. All rights reserved.
+ * Copyright (c) 2022-2024 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier:    BSD-3-Clause
  *
@@ -54,10 +54,10 @@
 	(((_fid) >= ARM_DRTM_SVC_VERSION) && ((_fid) <= ARM_DRTM_SVC_LOCK_TCB_HASH))
 
 /* ARM DRTM Service Calls version numbers */
-#define ARM_DRTM_VERSION_MAJOR		U(0)
+#define ARM_DRTM_VERSION_MAJOR		U(1)
 #define ARM_DRTM_VERSION_MAJOR_SHIFT	16
 #define ARM_DRTM_VERSION_MAJOR_MASK	U(0x7FFF)
-#define ARM_DRTM_VERSION_MINOR		U(1)
+#define ARM_DRTM_VERSION_MINOR		U(0)
 #define ARM_DRTM_VERSION_MINOR_SHIFT	0
 #define ARM_DRTM_VERSION_MINOR_MASK	U(0xFFFF)
 
@@ -74,7 +74,7 @@
 #define ARM_DRTM_FEAT_ID_MASK	ULL(0xff)
 
 /*
- * Definitions for DRTM features as per DRTM beta0 section 3.3,
+ * Definitions for DRTM features as per DRTM 1.0 section 3.3,
  * Table 6 DRTM_FEATURES
  */
 #define ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_SHIFT		U(33)
@@ -87,7 +87,7 @@
 #define ARM_DRTM_TPM_FEATURES_TPM_HASH_SUPPORTED	ULL(0x1)
 
 #define ARM_DRTM_TPM_FEATURES_FW_HASH_SHIFT		U(0)
-#define ARM_DRTM_TPM_FEATURES_FW_HASH_MASK		ULL(0xFFFFFFFF)
+#define ARM_DRTM_TPM_FEATURES_FW_HASH_MASK		ULL(0xFFFF)
 #define ARM_DRTM_TPM_FEATURES_FW_HASH_SHA256		ULL(0xB)
 #define ARM_DRTM_TPM_FEATURES_FW_HASH_SHA384		ULL(0xC)
 #define ARM_DRTM_TPM_FEATURES_FW_HASH_SHA512		ULL(0xD)
diff --git a/services/std_svc/drtm/drtm_main.c b/services/std_svc/drtm/drtm_main.c
index 3acf6838e..b9c83fa08 100644
--- a/services/std_svc/drtm/drtm_main.c
+++ b/services/std_svc/drtm/drtm_main.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Arm Limited. All rights reserved.
+ * Copyright (c) 2022-2024 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier:    BSD-3-Clause
  *
@@ -211,7 +211,7 @@ static enum drtm_retc drtm_dl_check_cores(void)
 	running_on_single_core = psci_is_last_on_cpu_safe();
 	if (!running_on_single_core) {
 		ERROR("DRTM: invalid launch due to non-boot PE not being turned off\n");
-		return DENIED;
+		return SECONDARY_PE_NOT_OFF;
 	}
 
 	return SUCCESS;
@@ -658,7 +658,7 @@ static uint64_t drtm_dynamic_launch(uint64_t x1, void *handle)
 	drtm_dl_prepare_eret_to_dlme(&args, dlme_el);
 
 	/*
-	 * As per DRTM beta0 spec table #28 invalidate the instruction cache
+	 * As per DRTM 1.0 spec table #30 invalidate the instruction cache
 	 * before jumping to the DLME. This is required to defend against
 	 * potentially-malicious cache contents.
 	 */
diff --git a/services/std_svc/drtm/drtm_main.h b/services/std_svc/drtm/drtm_main.h
index 60051632e..a7d053f17 100644
--- a/services/std_svc/drtm/drtm_main.h
+++ b/services/std_svc/drtm/drtm_main.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Arm Limited. All rights reserved.
+ * Copyright (c) 2022-2024 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier:    BSD-3-Clause
  *
@@ -55,6 +55,12 @@ enum drtm_retc {
 	NOT_FOUND = -4,
 	INTERNAL_ERROR = -5,
 	MEM_PROTECT_INVALID = -6,
+	COPROCESSOR_ERROR = -7,
+	OUT_OF_RESOURCE = -8,
+	INVALID_DATA = -9,
+	SECONDARY_PE_NOT_OFF = -10,
+	ALREADY_CLOSED = -11,
+	TPM_ERROR = -12
 };
 
 typedef struct {
@@ -89,6 +95,7 @@ struct __packed dlme_data_header_v1 {
 	uint64_t dlme_addr_map_size;
 	uint64_t dlme_tpm_log_size;
 	uint64_t dlme_tcb_hashes_table_size;
+	uint64_t dlme_acpi_tables_region_size;
 	uint64_t dlme_impdef_region_size;
 } __aligned(__alignof(uint16_t /* First member's type, `uint16_t version'. */));