diff --git a/plat/xilinx/versal/pm_service/pm_api_sys.c b/plat/xilinx/versal/pm_service/pm_api_sys.c
index d39b537..ead255f 100644
--- a/plat/xilinx/versal/pm_service/pm_api_sys.c
+++ b/plat/xilinx/versal/pm_service/pm_api_sys.c
@@ -465,6 +465,7 @@
  * @ioctl_id	ID of the requested IOCTL
  * @arg1	Argument 1 to requested IOCTL call
  * @arg2	Argument 2 to requested IOCTL call
+ * @arg3	Argument 3 to requested IOCTL call
  * @value	Returned output value
  * @flag	0 - Call from secure source
  *		1 - Call from non-secure source
@@ -475,8 +476,8 @@
  * of type enum pm_ret_status
  */
 enum pm_ret_status pm_api_ioctl(uint32_t device_id, uint32_t ioctl_id,
-				uint32_t arg1, uint32_t arg2, uint32_t *value,
-				uint32_t flag)
+				uint32_t arg1, uint32_t arg2, uint32_t arg3,
+				uint32_t *value, uint32_t flag)
 {
 	enum pm_ret_status ret;
 
diff --git a/plat/xilinx/versal/pm_service/pm_api_sys.h b/plat/xilinx/versal/pm_service/pm_api_sys.h
index b44b590..d3f5060 100644
--- a/plat/xilinx/versal/pm_service/pm_api_sys.h
+++ b/plat/xilinx/versal/pm_service/pm_api_sys.h
@@ -44,8 +44,8 @@
 enum pm_ret_status pm_system_shutdown(uint32_t type, uint32_t subtype,
 				      uint32_t flag);
 enum pm_ret_status pm_api_ioctl(uint32_t device_id, uint32_t ioctl_id,
-				uint32_t arg1, uint32_t arg2, uint32_t *value,
-				uint32_t flag);
+				uint32_t arg1, uint32_t arg2, uint32_t arg3,
+				uint32_t *value, uint32_t flag);
 enum pm_ret_status pm_query_data(uint32_t qid, uint32_t arg1, uint32_t arg2,
 				 uint32_t arg3, uint32_t *data, uint32_t flag);
 unsigned int pm_get_shutdown_scope(void);
diff --git a/plat/xilinx/versal/pm_service/pm_svc_main.c b/plat/xilinx/versal/pm_service/pm_svc_main.c
index f1f3991..c698aa7 100644
--- a/plat/xilinx/versal/pm_service/pm_svc_main.c
+++ b/plat/xilinx/versal/pm_service/pm_svc_main.c
@@ -135,7 +135,8 @@
 		uint32_t value;
 
 		ret = pm_api_ioctl(pm_arg[0], pm_arg[1], pm_arg[2],
-				   pm_arg[3], &value, security_flag);
+				   pm_arg[3], pm_arg[4],
+				   &value, security_flag);
 		if (ret == PM_RET_ERROR_NOTSUPPORTED)
 			return (uintptr_t)0;
 
@@ -290,7 +291,7 @@
  * pm_smc_handler() - SMC handler for PM-API calls coming from EL1/EL2.
  * @smc_fid - Function Identifier
  * @x1 - x4 - SMC64 Arguments from kernel
- *	      x3 and x4 are Unused
+ *	      x3 (upper 32-bits) and x4 are Unused
  * @cookie  - Unused
  * @handler - Pointer to caller's context structure
  *
@@ -327,7 +328,7 @@
 	pm_arg[1] = (uint32_t)(x1 >> 32);
 	pm_arg[2] = (uint32_t)x2;
 	pm_arg[3] = (uint32_t)(x2 >> 32);
-	(void)(x3);
+	pm_arg[4] = (uint32_t)x3;
 	(void)(x4);
 	api_id = smc_fid & FUNCID_NUM_MASK;