diff --git a/hypervisor/arch/x86/trusty.c b/hypervisor/arch/x86/trusty.c
index e017952e6..2178954ed 100644
--- a/hypervisor/arch/x86/trusty.c
+++ b/hypervisor/arch/x86/trusty.c
@@ -7,7 +7,8 @@
 #include <hypervisor.h>
 #include <hkdf.h>
 
-#define TRUSTY_VERSION 1
+#define TRUSTY_VERSION   1U
+#define TRUSTY_VERSION_2 2U
 
 struct trusty_mem {
 	/* The first page of trusty memory is reserved for key_info and
@@ -425,14 +426,20 @@ bool initialize_trusty(struct vcpu *vcpu, uint64_t param)
 		return false;
 	}
 
+	/* FIXME: Temporarily comments out the size check since need to extend
+	 *        the interface, need to add back after the integration done.
+	 */
+	/*
 	if (sizeof(struct trusty_boot_param) !=
 			boot_param.size_of_this_struct) {
 		pr_err("%s: sizeof(struct trusty_boot_param) mismatch!\n",
 			__func__);
 		return false;
 	}
+	*/
 
-	if (boot_param.version != TRUSTY_VERSION) {
+	if ((boot_param.version != TRUSTY_VERSION) &&
+		(boot_param.version != TRUSTY_VERSION_2)) {
 		pr_err("%s: version of(trusty_boot_param) mismatch!\n",
 			__func__);
 		return false;
@@ -461,6 +468,14 @@ bool initialize_trusty(struct vcpu *vcpu, uint64_t param)
 	/* save Normal World context */
 	save_world_ctx(&vcpu->arch_vcpu.contexts[NORMAL_WORLD]);
 
+	if (boot_param.version == TRUSTY_VERSION_2) {
+		/* copy rpmb_key from OSloader */
+		memcpy_s(&g_key_info.rpmb_key[0][0], 64U,
+				&boot_param.rpmb_key[0], 64U);
+		memset(&boot_param.rpmb_key[0], 0U, 64U);
+		/* OSloader must clear the rpmb_key after switched back */
+	}
+
 	/* init secure world environment */
 	if (init_secure_world_env(vcpu,
 		trusty_entry_gpa - trusty_base_gpa + TRUSTY_EPT_REBASE_GPA,
diff --git a/hypervisor/include/public/acrn_hv_defs.h b/hypervisor/include/public/acrn_hv_defs.h
index ce2dd987b..85983c9f9 100644
--- a/hypervisor/include/public/acrn_hv_defs.h
+++ b/hypervisor/include/public/acrn_hv_defs.h
@@ -256,6 +256,12 @@ struct trusty_boot_param {
 
 	/** trusty runtime memory size */
 	uint32_t mem_size;
+
+	/** padding */
+	uint32_t padding;
+
+	/** rpmb key */
+	uint8_t rpmb_key[64];
 } __aligned(8);
 
 /**