diff --git a/include/CA/tee_client_constants.h b/include/CA/tee_client_constants.h
index 9ddff9b3c4d01d94533ae9355d10e530d1d2b0dc..3b86dcbb7d3f563bdc237c795d3661c70f9fc3cb 100644
--- a/include/CA/tee_client_constants.h
+++ b/include/CA/tee_client_constants.h
@@ -66,6 +66,7 @@ enum TEEC_SharedMemCtl {
     TEEC_MEM_INPUT = 0x1,  /* input type of memroy */
     TEEC_MEM_OUTPUT = 0x2, /* output type of memory */
     TEEC_MEM_INOUT = 0x3,  /* memory is used as both input and output */
+    TEEC_MEM_SHARED_INOUT = 0x4, /* no copy shared memory */
 };
 
 enum TEEC_ParamType {
@@ -79,6 +80,7 @@ enum TEEC_ParamType {
                                        refer TEEC_TempMemoryReference */
     TEEC_ION_INPUT = 0x08,  /* input type of icon memory reference, refer TEEC_IonReference */
     TEEC_ION_SGLIST_INPUT = 0x09, /* input type of ion memory block reference, refer TEEC_IonSglistReference */
+    TEEC_MEMREF_SHARED_INOUT = 0xa, /* no copy mem */
     TEEC_MEMREF_WHOLE = 0xc, /* use whole memory block, refer TEEC_RegisteredMemoryReference */
     TEEC_MEMREF_PARTIAL_INPUT = 0xd, /* input type of memory reference, refer TEEC_RegisteredMemoryReference */
     TEEC_MEMREF_PARTIAL_OUTPUT = 0xe, /* output type of memory reference, refer TEEC_RegisteredMemoryReference */
diff --git a/include/CA/tee_client_type.h b/include/CA/tee_client_type.h
index c5b97e32ea3d337b932bad7f6b22b9b71fdd88fe..54692dd43477ad4a1c6f8ef424e282919fcb26a7 100644
--- a/include/CA/tee_client_type.h
+++ b/include/CA/tee_client_type.h
@@ -107,6 +107,15 @@ typedef struct {
     uint32_t offset;
 } TEEC_RegisteredMemoryReference;
 
+/*
+ * the corresponding param types are
+ * TEEC_SHAREDMEM_INOUT
+ */
+typedef struct {
+    TEEC_SharedMemory *parent;
+    uint32_t size;
+} TEEC_RegisteredSharedMemory;
+
 /*
  * the corresponding param types are
  * TEEC_VALUE_INPUT/TEEC_VALUE_OUTPUT/TEEC_VALUE_INOUT
@@ -124,6 +133,7 @@ typedef struct {
 typedef union {
     TEEC_TempMemoryReference tmpref;
     TEEC_RegisteredMemoryReference memref;
+    TEEC_RegisteredSharedMemory sharedmem;
     TEEC_Value value;
     TEEC_IonReference ionref;
 } TEEC_Parameter;