diff --git a/plat/xilinx/versal/pm_service/pm_api_sys.c b/plat/xilinx/versal/pm_service/pm_api_sys.c
index 3cdd9d0..a578543 100644
--- a/plat/xilinx/versal/pm_service/pm_api_sys.c
+++ b/plat/xilinx/versal/pm_service/pm_api_sys.c
@@ -38,33 +38,33 @@
 /**
  * Assigning of argument values into array elements.
  */
-#define PM_PACK_PAYLOAD1(pl, mid, arg0) {	\
-	pl[0] = (uint32_t)((uint32_t)((arg0) & 0xFF) | (mid << 8)); \
+#define PM_PACK_PAYLOAD1(pl, mid, flag, arg0) {	\
+	pl[0] = (uint32_t)((uint32_t)((arg0) & 0xFF) | (mid << 8) | ((flag) << 24)); \
 }
 
-#define PM_PACK_PAYLOAD2(pl, mid, arg0, arg1) {		\
-	pl[1] = (uint32_t)(arg1);			\
-	PM_PACK_PAYLOAD1(pl, mid, arg0);		\
+#define PM_PACK_PAYLOAD2(pl, mid, flag, arg0, arg1) {		\
+	pl[1] = (uint32_t)(arg1);				\
+	PM_PACK_PAYLOAD1(pl, mid, flag, arg0);			\
 }
 
-#define PM_PACK_PAYLOAD3(pl, mid, arg0, arg1, arg2) {	\
-	pl[2] = (uint32_t)(arg2);			\
-	PM_PACK_PAYLOAD2(pl, mid, arg0, arg1);		\
+#define PM_PACK_PAYLOAD3(pl, mid, flag, arg0, arg1, arg2) {	\
+	pl[2] = (uint32_t)(arg2);				\
+	PM_PACK_PAYLOAD2(pl, mid, flag, arg0, arg1);		\
 }
 
-#define PM_PACK_PAYLOAD4(pl, mid, arg0, arg1, arg2, arg3) {	\
-	pl[3] = (uint32_t)(arg3);				\
-	PM_PACK_PAYLOAD3(pl, mid, arg0, arg1, arg2);		\
+#define PM_PACK_PAYLOAD4(pl, mid, flag, arg0, arg1, arg2, arg3) {	\
+	pl[3] = (uint32_t)(arg3);					\
+	PM_PACK_PAYLOAD3(pl, mid, flag, arg0, arg1, arg2);		\
 }
 
-#define PM_PACK_PAYLOAD5(pl, mid, arg0, arg1, arg2, arg3, arg4) {	\
+#define PM_PACK_PAYLOAD5(pl, mid, flag, arg0, arg1, arg2, arg3, arg4) {	\
 	pl[4] = (uint32_t)(arg4);					\
-	PM_PACK_PAYLOAD4(pl, mid, arg0, arg1, arg2, arg3);		\
+	PM_PACK_PAYLOAD4(pl, mid, flag, arg0, arg1, arg2, arg3);	\
 }
 
-#define PM_PACK_PAYLOAD6(pl, mid, arg0, arg1, arg2, arg3, arg4, arg5) {	\
-	pl[5] = (uint32_t)(arg5);					\
-	PM_PACK_PAYLOAD5(pl, mid, arg0, arg1, arg2, arg3, arg4);	\
+#define PM_PACK_PAYLOAD6(pl, mid, flag, arg0, arg1, arg2, arg3, arg4, arg5) {	\
+	pl[5] = (uint32_t)(arg5);						\
+	PM_PACK_PAYLOAD5(pl, mid, flag, arg0, arg1, arg2, arg3, arg4);		\
 }
 
 /* PM API functions */
@@ -72,15 +72,17 @@
 /**
  * pm_get_api_version() - Get version number of PMC PM firmware
  * @version	Returns 32-bit version number of PMC Power Management Firmware
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_get_api_version(unsigned int *version)
+enum pm_ret_status pm_get_api_version(unsigned int *version, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, PM_GET_API_VERSION);
+	PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, flag, PM_GET_API_VERSION);
 	return pm_ipi_send_sync(primary_proc, payload, version, 1);
 }
 
@@ -88,15 +90,17 @@
  * pm_init_finalize() - Call to notify PMC PM firmware that master has power
  *			management enabled and that it has finished its
  *			initialization
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Status returned by the PMU firmware
  */
-enum pm_ret_status pm_init_finalize(void)
+enum pm_ret_status pm_init_finalize(uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMU */
-	PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, PM_INIT_FINALIZE);
+	PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, flag, PM_INIT_FINALIZE);
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
 
@@ -106,6 +110,8 @@
  * @latency	Requested maximum wakeup latency (not supported)
  * @state	Requested state
  * @address	Resume address
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * This is a blocking call, it will return only once PMU has responded.
  * On a wakeup, resume address will be automatically set by PMU.
@@ -115,7 +121,7 @@
 enum pm_ret_status pm_self_suspend(uint32_t nid,
 				   unsigned int latency,
 				   unsigned int state,
-				   uintptr_t address)
+				   uintptr_t address, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 	unsigned int cpuid = plat_my_core_pos();
@@ -133,7 +139,7 @@
 	pm_client_suspend(proc, state);
 
 	/* Send request to the PLM */
-	PM_PACK_PAYLOAD6(payload, LIBPM_MODULE_ID, PM_SELF_SUSPEND,
+	PM_PACK_PAYLOAD6(payload, LIBPM_MODULE_ID, flag, PM_SELF_SUSPEND,
 			 proc->node_id, latency, state, address,
 			 (address >> 32));
 	return pm_ipi_send_sync(proc, payload, NULL, 0);
@@ -143,13 +149,15 @@
  * pm_abort_suspend() - PM call to announce that a prior suspend request
  *			is to be aborted.
  * @reason	Reason for the abort
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * Calling PU expects the PMU to abort the initiated suspend procedure.
  * This is a non-blocking call without any acknowledge.
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_abort_suspend(enum pm_abort_reason reason)
+enum pm_ret_status pm_abort_suspend(enum pm_abort_reason reason, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
@@ -160,8 +168,8 @@
 	pm_client_abort_suspend();
 
 	/* Send request to the PLM */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_ABORT_SUSPEND, reason,
-			 primary_proc->node_id);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_ABORT_SUSPEND,
+			 reason, primary_proc->node_id);
 	return pm_ipi_send(primary_proc, payload);
 }
 
@@ -172,16 +180,19 @@
  * @ack		Flag to specify whether acknowledge is requested
  * @latency	Requested wakeup latency (not supported)
  * @state	Requested state (not supported)
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_req_suspend(uint32_t target, uint8_t ack,
-				  unsigned int latency, unsigned int state)
+				  unsigned int latency, unsigned int state,
+				  uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMU */
-	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, PM_REQ_SUSPEND, target,
+	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, flag, PM_REQ_SUSPEND, target,
 			 latency, state);
 	if (ack == IPI_BLOCKING)
 		return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
@@ -197,6 +208,8 @@
  *		1 - resume address specified, 0 - otherwise
  * @address	Resume address
  * @ack		Flag to specify whether acknowledge requested
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * This API function is either used to power up another APU core for SMP
  * (by PSCI) or to power up an entirely different PU or subsystem, such
@@ -206,12 +219,12 @@
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_req_wakeup(uint32_t target, uint32_t set_address,
-				 uintptr_t address, uint8_t ack)
+				 uintptr_t address, uint8_t ack, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC to perform the wake of the PU */
-	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, PM_REQ_WAKEUP, target,
+	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, flag, PM_REQ_WAKEUP, target,
 			 set_address, address, ack);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
@@ -223,16 +236,18 @@
  * @capabilities	Requested capabilities for the device
  * @qos			Required Quality of Service
  * @ack			Flag to specify whether acknowledge requested
+ * @flag		0 - Call from secure source
+ *			1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_request_device(uint32_t device_id, uint32_t capabilities,
-				     uint32_t qos, uint32_t ack)
+				     uint32_t qos, uint32_t ack, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, PM_REQUEST_DEVICE,
+	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, flag, PM_REQUEST_DEVICE,
 			 device_id, capabilities, qos, ack);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
@@ -241,15 +256,17 @@
 /**
  * pm_release_device() - Release a device
  * @device_id		Device ID
+ * @flag		0 - Call from secure source
+ *			1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_release_device(uint32_t device_id)
+enum pm_ret_status pm_release_device(uint32_t device_id, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_RELEASE_DEVICE,
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_RELEASE_DEVICE,
 			 device_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
@@ -261,16 +278,19 @@
  * @capabilities	Requested capabilities for the device
  * @latency		Requested maximum latency
  * @qos			Required Quality of Service
+ * @flag		0 - Call from secure source
+ *			1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_set_requirement(uint32_t device_id, uint32_t capabilities,
-				      uint32_t latency, uint32_t qos)
+				      uint32_t latency, uint32_t qos,
+				      uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, PM_SET_REQUIREMENT,
+	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, flag, PM_SET_REQUIREMENT,
 			 device_id, capabilities, latency, qos);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
@@ -280,15 +300,18 @@
  * pm_get_device_status() - Get device's status
  * @device_id		Device ID
  * @response		Buffer to store device status response
+ * @flag		0 - Call from secure source
+ *			1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_get_device_status(uint32_t device_id, uint32_t *response)
+enum pm_ret_status pm_get_device_status(uint32_t device_id, uint32_t *response,
+					uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_GET_DEVICE_STATUS,
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_GET_DEVICE_STATUS,
 			 device_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, response, 3);
@@ -298,15 +321,17 @@
  * pm_reset_assert() - Assert/De-assert reset
  * @reset	Reset ID
  * @assert	Assert (1) or de-assert (0)
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_reset_assert(uint32_t reset, bool assert)
+enum pm_ret_status pm_reset_assert(uint32_t reset, bool assert, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_RESET_ASSERT, reset,
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_RESET_ASSERT, reset,
 			 assert);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
@@ -316,15 +341,19 @@
  * pm_reset_get_status() - Get current status of a reset line
  * @reset	Reset ID
  * @status	Returns current status of selected reset ID
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_reset_get_status(uint32_t reset, uint32_t *status)
+enum pm_ret_status pm_reset_get_status(uint32_t reset, uint32_t *status,
+				       uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_RESET_ASSERT, reset);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_RESET_ASSERT,
+			 reset);
 
 	return pm_ipi_send_sync(primary_proc, payload, status, 1);
 }
@@ -332,10 +361,12 @@
 /**
  * pm_get_callbackdata() - Read from IPI response buffer
  * @data - array of PAYLOAD_ARG_CNT elements
+ * @flag - 0 - Call from secure source
+ *	   1 - Call from non-secure source
  *
  * Read value from ipi buffer response buffer.
  */
-void pm_get_callbackdata(uint32_t *data, size_t count)
+void pm_get_callbackdata(uint32_t *data, size_t count, uint32_t flag)
 {
 	/* Return if interrupt is not from PMU */
 	if (!pm_ipi_irq_status(primary_proc))
@@ -348,15 +379,18 @@
 /**
  * pm_pinctrl_request() - Request a pin
  * @pin		Pin ID
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_pinctrl_request(uint32_t pin)
+enum pm_ret_status pm_pinctrl_request(uint32_t pin, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_PINCTRL_REQUEST, pin);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_PINCTRL_REQUEST,
+			 pin);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -364,15 +398,18 @@
 /**
  * pm_pinctrl_release() - Release a pin
  * @pin		Pin ID
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_pinctrl_release(uint32_t pin)
+enum pm_ret_status pm_pinctrl_release(uint32_t pin, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_PINCTRL_RELEASE, pin);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_PINCTRL_RELEASE,
+			 pin);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -381,16 +418,19 @@
  * pm_pinctrl_set_function() - Set pin function
  * @pin		Pin ID
  * @function	Function ID
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_pinctrl_set_function(uint32_t pin, uint32_t function)
+enum pm_ret_status pm_pinctrl_set_function(uint32_t pin, uint32_t function,
+					   uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_PINCTRL_SET_FUNCTION, pin,
-			 function)
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag,
+			 PM_PINCTRL_SET_FUNCTION, pin, function)
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -399,16 +439,19 @@
  * pm_pinctrl_get_function() - Get function set on the pin
  * @pin		Pin ID
  * @function	Function set on the pin
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_pinctrl_get_function(uint32_t pin, uint32_t *function)
+enum pm_ret_status pm_pinctrl_get_function(uint32_t pin, uint32_t *function,
+					   uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_PINCTRL_SET_FUNCTION,
-			 pin);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag,
+			 PM_PINCTRL_SET_FUNCTION, pin);
 
 	return pm_ipi_send_sync(primary_proc, payload, function, 1);
 }
@@ -418,17 +461,19 @@
  * @pin		Pin ID
  * @param	Parameter ID
  * @value	Parameter value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_pinctrl_set_pin_param(uint32_t pin, uint32_t param,
-					    uint32_t value)
+					    uint32_t value, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, PM_PINCTRL_CONFIG_PARAM_SET,
-			 pin, param, value);
+	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, flag,
+			 PM_PINCTRL_CONFIG_PARAM_SET, pin, param, value);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -438,17 +483,19 @@
  * @pin		Pin ID
  * @param	Parameter ID
  * @value	Buffer to store parameter value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_pinctrl_get_pin_param(uint32_t pin, uint32_t param,
-					    uint32_t *value)
+					    uint32_t *value, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_PINCTRL_CONFIG_PARAM_GET,
-			 pin, param);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag,
+			 PM_PINCTRL_CONFIG_PARAM_GET, pin, param);
 
 	return pm_ipi_send_sync(primary_proc, payload, value, 1);
 }
@@ -456,15 +503,18 @@
 /**
  * pm_clock_enable() - Enable the clock
  * @clk_id	Clock ID
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_clock_enable(uint32_t clk_id)
+enum pm_ret_status pm_clock_enable(uint32_t clk_id, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_CLOCK_ENABLE, clk_id);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_CLOCK_ENABLE,
+			 clk_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -472,15 +522,18 @@
 /**
  * pm_clock_disable() - Disable the clock
  * @clk_id	Clock ID
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_clock_disable(uint32_t clk_id)
+enum pm_ret_status pm_clock_disable(uint32_t clk_id, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_CLOCK_DISABLE, clk_id);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_CLOCK_DISABLE,
+			 clk_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -489,15 +542,19 @@
  * pm_clock_get_state() - Get clock status
  * @clk_id	Clock ID
  * @state:	Buffer to store clock status (1: Enabled, 0:Disabled)
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_clock_get_state(uint32_t clk_id, uint32_t *state)
+enum pm_ret_status pm_clock_get_state(uint32_t clk_id, uint32_t *state,
+				      uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_CLOCK_GETSTATE, clk_id);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_CLOCK_GETSTATE,
+			 clk_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, state, 1);
 }
@@ -506,16 +563,19 @@
  * pm_clock_set_divider() - Set divider for the clock
  * @clk_id	Clock ID
  * @divider	Divider value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_clock_set_divider(uint32_t clk_id, uint32_t divider)
+enum pm_ret_status pm_clock_set_divider(uint32_t clk_id, uint32_t divider,
+					uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_CLOCK_SETDIVIDER, clk_id,
-			 divider);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_CLOCK_SETDIVIDER,
+			 clk_id, divider);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -524,15 +584,19 @@
  * pm_clock_get_divider() - Get divider value for the clock
  * @clk_id	Clock ID
  * @divider:	Buffer to store clock divider value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_clock_get_divider(uint32_t clk_id, uint32_t *divider)
+enum pm_ret_status pm_clock_get_divider(uint32_t clk_id, uint32_t *divider,
+					uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_CLOCK_GETDIVIDER, clk_id);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_CLOCK_GETDIVIDER,
+			 clk_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, divider, 1);
 }
@@ -541,16 +605,19 @@
  * pm_clock_set_parent() - Set parent for the clock
  * @clk_id	Clock ID
  * @parent	Parent ID
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_clock_set_parent(uint32_t clk_id, uint32_t parent)
+enum pm_ret_status pm_clock_set_parent(uint32_t clk_id, uint32_t parent,
+				       uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_CLOCK_SETPARENT, clk_id,
-			 parent);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_CLOCK_SETPARENT,
+			 clk_id, parent);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -559,15 +626,19 @@
  * pm_clock_get_parent() - Get parent value for the clock
  * @clk_id	Clock ID
  * @parent:	Buffer to store clock parent value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_clock_get_parent(uint32_t clk_id, uint32_t *parent)
+enum pm_ret_status pm_clock_get_parent(uint32_t clk_id, uint32_t *parent,
+				       uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_CLOCK_GETPARENT, clk_id);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_CLOCK_GETPARENT,
+			 clk_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, parent, 1);
 }
@@ -575,15 +646,19 @@
  * pm_clock_get_rate() - Get the rate value for the clock
  * @clk_id	Clock ID
  * @rate:	Buffer to store clock rate value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_clock_get_rate(uint32_t clk_id, uint32_t *clk_rate)
+enum pm_ret_status pm_clock_get_rate(uint32_t clk_id, uint32_t *clk_rate,
+				     uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_CLOCK_GETRATE, clk_id);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_CLOCK_GETRATE,
+			 clk_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, clk_rate, 2);
 }
@@ -593,17 +668,19 @@
  * @clk_id	PLL clock ID
  * @param	PLL parameter ID
  * @value	Value to set for PLL parameter
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_pll_set_param(uint32_t clk_id, uint32_t param,
-				    uint32_t value)
+				    uint32_t value, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, PM_PLL_SET_PARAMETER, clk_id,
-			 param, value);
+	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, flag, PM_PLL_SET_PARAMETER,
+			 clk_id, param, value);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -613,17 +690,19 @@
  * @clk_id	PLL clock ID
  * @param	PLL parameter ID
  * @value:	Buffer to store PLL parameter value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_pll_get_param(uint32_t clk_id, uint32_t param,
-				    uint32_t *value)
+				    uint32_t *value, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_PLL_GET_PARAMETER, clk_id,
-			 param);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_PLL_GET_PARAMETER,
+			 clk_id, param);
 
 	return pm_ipi_send_sync(primary_proc, payload, value, 1);
 }
@@ -632,16 +711,19 @@
  * pm_pll_set_mode() - Set PLL mode
  * @clk_id	PLL clock ID
  * @mode	PLL mode
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_pll_set_mode(uint32_t clk_id, uint32_t mode)
+enum pm_ret_status pm_pll_set_mode(uint32_t clk_id, uint32_t mode,
+				   uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_PLL_SET_MODE, clk_id,
-			 mode);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_PLL_SET_MODE,
+			 clk_id, mode);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -650,15 +732,19 @@
  * pm_pll_get_mode() - Get PLL mode
  * @clk_id	PLL clock ID
  * @mode:	Buffer to store PLL mode
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_pll_get_mode(uint32_t clk_id, uint32_t *mode)
+enum pm_ret_status pm_pll_get_mode(uint32_t clk_id, uint32_t *mode,
+				   uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_PLL_GET_MODE, clk_id);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag, PM_PLL_GET_MODE,
+			 clk_id);
 
 	return pm_ipi_send_sync(primary_proc, payload, mode, 1);
 }
@@ -668,16 +754,19 @@
  *			  be powered down forcefully
  * @target	Device ID of the PU node to be forced powered down.
  * @ack		Flag to specify whether acknowledge is requested
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_force_powerdown(uint32_t target, uint8_t ack)
+enum pm_ret_status pm_force_powerdown(uint32_t target, uint8_t ack,
+				      uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_FORCE_POWERDOWN, target,
-			 ack);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_FORCE_POWERDOWN,
+			 target, ack);
 
 	if (ack == IPI_BLOCKING)
 		return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
@@ -689,10 +778,13 @@
  * pm_system_shutdown() - PM call to request a system shutdown or restart
  * @type	Shutdown or restart? 0=shutdown, 1=restart, 2=setscope
  * @subtype	Scope: 0=APU-subsystem, 1=PS, 2=system
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_system_shutdown(uint32_t type, uint32_t subtype)
+enum pm_ret_status pm_system_shutdown(uint32_t type, uint32_t subtype,
+				      uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
@@ -703,8 +795,8 @@
 	}
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_SYSTEM_SHUTDOWN, type,
-			 subtype);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_SYSTEM_SHUTDOWN,
+			 type, subtype);
 
 	return pm_ipi_send_non_blocking(primary_proc, payload);
 }
@@ -716,11 +808,13 @@
 * @arg2	Argument 2 to requested query data call
 * @arg3	Argument 3 to requested query data call
 * @data	Returned output data
+* @flag 0 - Call from secure source
+*	1 - Call from non-secure source
 *
 * This function returns requested data.
 */
 enum pm_ret_status pm_query_data(uint32_t qid, uint32_t arg1, uint32_t arg2,
-				 uint32_t arg3, uint32_t *data)
+				 uint32_t arg3, uint32_t *data, uint32_t flag)
 {
 	uint32_t ret;
 	uint32_t version;
@@ -728,10 +822,10 @@
 	uint32_t fw_api_version;
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, PM_QUERY_DATA, qid, arg1,
-			 arg2, arg3);
+	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, flag, PM_QUERY_DATA, qid,
+			 arg1, arg2, arg3);
 
-	ret = pm_feature_check(PM_QUERY_DATA, &version);
+	ret = pm_feature_check(PM_QUERY_DATA, &version, flag);
 	if (PM_RET_SUCCESS == ret) {
 		fw_api_version = version & 0xFFFF ;
 		if ((2U == fw_api_version) &&
@@ -755,29 +849,32 @@
  * @arg1	Argument 1 to requested IOCTL call
  * @arg2	Argument 2 to requested IOCTL call
  * @value	Returned output value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * This function calls IOCTL to firmware for device control and configuration.
  *
  * @return	Returns status, either success or error+reason
  */
 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 arg1, uint32_t arg2, uint32_t *value,
+				uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	switch (ioctl_id) {
 	case IOCTL_SET_PLL_FRAC_MODE:
-		return pm_pll_set_mode(arg1, arg2);
+		return pm_pll_set_mode(arg1, arg2, flag);
 	case IOCTL_GET_PLL_FRAC_MODE:
-		return pm_pll_get_mode(arg1, value);
+		return pm_pll_get_mode(arg1, value, flag);
 	case IOCTL_SET_PLL_FRAC_DATA:
-		return pm_pll_set_param(arg1, PM_PLL_PARAM_DATA, arg2);
+		return pm_pll_set_param(arg1, PM_PLL_PARAM_DATA, arg2, flag);
 	case IOCTL_GET_PLL_FRAC_DATA:
-		return pm_pll_get_param(arg1, PM_PLL_PARAM_DATA, value);
+		return pm_pll_get_param(arg1, PM_PLL_PARAM_DATA, value, flag);
 	default:
 		/* Send request to the PMC */
-		PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, PM_IOCTL, device_id,
-				 ioctl_id, arg1, arg2);
+		PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, flag, PM_IOCTL,
+				 device_id, ioctl_id, arg1, arg2);
 		return pm_ipi_send_sync(primary_proc, payload, value, 1);
 	}
 }
@@ -787,16 +884,18 @@
  * @target	Device id of the targeted PU or subsystem
  * @wkup_node	Device id of the wakeup peripheral
  * @enable	Enable or disable the specified peripheral as wake source
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_set_wakeup_source(uint32_t target, uint32_t wkup_device,
-					uint8_t enable)
+					uint8_t enable, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
-	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, PM_SET_WAKEUP_SOURCE, target,
-			 wkup_device, enable);
+	PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, flag, PM_SET_WAKEUP_SOURCE,
+			 target, wkup_device, enable);
 	return pm_ipi_send(primary_proc, payload);
 }
 
@@ -804,15 +903,17 @@
  * pm_get_chipid() - Read silicon ID registers
  * @value       Buffer for return values. Must be large enough
  *		to hold 8 bytes.
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return      Returns silicon ID registers
  */
-enum pm_ret_status pm_get_chipid(uint32_t *value)
+enum pm_ret_status pm_get_chipid(uint32_t *value, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, PM_GET_CHIPID);
+	PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, flag, PM_GET_CHIPID);
 
 	return pm_ipi_send_sync(primary_proc, payload, value, 2);
 }
@@ -821,10 +922,13 @@
  * pm_feature_check() - Returns the supported API version if supported
  * @api_id	API ID to check
  * @value	Returned supported API version
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_feature_check(uint32_t api_id, unsigned int *version)
+enum pm_ret_status pm_feature_check(uint32_t api_id, unsigned int *version,
+				    uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT], fw_api_version;
 	uint32_t status;
@@ -884,7 +988,8 @@
 		return PM_RET_ERROR_NOFEATURE;
 	}
 
-	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_FEATURE_CHECK, api_id);
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, flag,
+			 PM_FEATURE_CHECK, api_id);
 
 	status = pm_ipi_send_sync(primary_proc, payload, &fw_api_version, 1);
 	if (status != PM_RET_SUCCESS)
@@ -903,16 +1008,18 @@
  * src:        Source device of pdi(DDR, OCM, SD etc)
  * address_low: lower 32-bit Linear memory space address
  * address_high: higher 32-bit Linear memory space address
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return      Returns status, either success or error+reason
  */
-enum pm_ret_status pm_load_pdi(uint32_t src,
-			       uint32_t address_low, uint32_t address_high)
+enum pm_ret_status pm_load_pdi(uint32_t src, uint32_t address_low,
+			       uint32_t address_high, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMU */
-	PM_PACK_PAYLOAD4(payload, LOADER_MODULE_ID, PM_LOAD_PDI, src,
+	PM_PACK_PAYLOAD4(payload, LOADER_MODULE_ID, flag, PM_LOAD_PDI, src,
 			 address_high, address_low);
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
 }
@@ -925,18 +1032,20 @@
  *              (power, temperature and latency)
  * @result      Returns the operating characteristic for the requested device,
  *              specified by the type
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return      Returns status, either success or error+reason
  */
 enum pm_ret_status pm_get_op_characteristic(uint32_t device_id,
 					    enum pm_opchar_type type,
-					    uint32_t *result)
+					    uint32_t *result, uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_GET_OP_CHARACTERISTIC,
-			 device_id, type);
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag,
+			 PM_GET_OP_CHARACTERISTIC, device_id, type);
 	return pm_ipi_send_sync(primary_proc, payload, result, 1);
 }
 
@@ -946,15 +1055,18 @@
  *			  used by that CPU.
  * @device_id	Device ID
  * @latency	Latency value
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
-enum pm_ret_status pm_set_max_latency(uint32_t device_id, uint32_t latency)
+enum pm_ret_status pm_set_max_latency(uint32_t device_id, uint32_t latency,
+				      uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_SET_MAX_LATENCY,
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, flag, PM_SET_MAX_LATENCY,
 			 device_id, latency);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
@@ -967,16 +1079,19 @@
  * @event	Event in question
  * @wake	Wake subsystem upon capturing the event if value 1
  * @enable	Enable the registration for value 1, disable for value 0
+ * @flag	0 - Call from secure source
+ *		1 - Call from non-secure source
  *
  * @return	Returns status, either success or error+reason
  */
 enum pm_ret_status pm_register_notifier(uint32_t device_id, uint32_t event,
-					uint32_t wake, uint32_t enable)
+					uint32_t wake, uint32_t enable,
+					uint32_t flag)
 {
 	uint32_t payload[PAYLOAD_ARG_CNT];
 
 	/* Send request to the PMC */
-	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, PM_REGISTER_NOTIFIER,
+	PM_PACK_PAYLOAD5(payload, LIBPM_MODULE_ID, flag, PM_REGISTER_NOTIFIER,
 			 device_id, event, wake, enable);
 
 	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
diff --git a/plat/xilinx/versal/pm_service/pm_api_sys.h b/plat/xilinx/versal/pm_service/pm_api_sys.h
index 84867b6..5a92704 100644
--- a/plat/xilinx/versal/pm_service/pm_api_sys.h
+++ b/plat/xilinx/versal/pm_service/pm_api_sys.h
@@ -14,67 +14,86 @@
  * PM API function declarations
  **********************************************************/
 
-enum pm_ret_status pm_get_api_version(unsigned int *version);
-enum pm_ret_status pm_init_finalize(void);
+enum pm_ret_status pm_get_api_version(unsigned int *version, uint32_t flag);
+enum pm_ret_status pm_init_finalize(uint32_t flag);
 enum pm_ret_status pm_self_suspend(uint32_t nid,
 				   unsigned int latency,
 				   unsigned int state,
-				   uintptr_t address);
-enum pm_ret_status pm_abort_suspend(enum pm_abort_reason reason);
+				   uintptr_t address, uint32_t flag);
+enum pm_ret_status pm_abort_suspend(enum pm_abort_reason reason, uint32_t flag);
 enum pm_ret_status pm_req_suspend(uint32_t target,
 				  uint8_t ack,
 				  unsigned int latency,
-				  unsigned int state);
+				  unsigned int state, uint32_t flag);
 enum pm_ret_status pm_req_wakeup(uint32_t target, uint32_t set_address,
-				 uintptr_t address, uint8_t ack);
+				 uintptr_t address, uint8_t ack, uint32_t flag);
 enum pm_ret_status pm_set_wakeup_source(uint32_t target, uint32_t device_id,
-					uint8_t enable);
+					uint8_t enable, uint32_t flag);
 enum pm_ret_status pm_request_device(uint32_t device_id, uint32_t capabilities,
-				     uint32_t qos, uint32_t ack);
-enum pm_ret_status pm_release_device(uint32_t device_id);
+				     uint32_t qos, uint32_t ack, uint32_t flag);
+enum pm_ret_status pm_release_device(uint32_t device_id, uint32_t flag);
 enum pm_ret_status pm_set_requirement(uint32_t device_id, uint32_t capabilities,
-				      uint32_t latency, uint32_t qos);
-enum pm_ret_status pm_get_device_status(uint32_t device_id, uint32_t *response);
-enum pm_ret_status pm_reset_assert(uint32_t reset, bool assert);
-enum pm_ret_status pm_reset_get_status(uint32_t reset, uint32_t *status);
-void pm_get_callbackdata(uint32_t *data, size_t count);
-enum pm_ret_status pm_pinctrl_request(uint32_t pin);
-enum pm_ret_status pm_pinctrl_release(uint32_t pin);
-enum pm_ret_status pm_pinctrl_set_function(uint32_t pin, uint32_t function);
-enum pm_ret_status pm_pinctrl_get_function(uint32_t pin, uint32_t *function);
+				      uint32_t latency, uint32_t qos,
+				      uint32_t flag);
+enum pm_ret_status pm_get_device_status(uint32_t device_id, uint32_t *response,
+					uint32_t flag);
+enum pm_ret_status pm_reset_assert(uint32_t reset, bool assert, uint32_t flag);
+enum pm_ret_status pm_reset_get_status(uint32_t reset, uint32_t *status,
+				       uint32_t flag);
+void pm_get_callbackdata(uint32_t *data, size_t count, uint32_t flag);
+enum pm_ret_status pm_pinctrl_request(uint32_t pin, uint32_t flag);
+enum pm_ret_status pm_pinctrl_release(uint32_t pin, uint32_t flag);
+enum pm_ret_status pm_pinctrl_set_function(uint32_t pin, uint32_t function,
+					   uint32_t flag);
+enum pm_ret_status pm_pinctrl_get_function(uint32_t pin, uint32_t *function,
+					   uint32_t flag);
 enum pm_ret_status pm_pinctrl_set_pin_param(uint32_t pin, uint32_t param,
-					    uint32_t value);
+					    uint32_t value, uint32_t flag);
 enum pm_ret_status pm_pinctrl_get_pin_param(uint32_t pin, uint32_t param,
-					    uint32_t *value);
-enum pm_ret_status pm_clock_enable(uint32_t clk_id);
-enum pm_ret_status pm_clock_disable(uint32_t clk_id);
-enum pm_ret_status pm_clock_get_state(uint32_t clk_id, uint32_t *state);
-enum pm_ret_status pm_clock_set_divider(uint32_t clk_id, uint32_t divider);
-enum pm_ret_status pm_clock_get_divider(uint32_t clk_id, uint32_t *divider);
-enum pm_ret_status pm_clock_set_parent(uint32_t clk_id, uint32_t parent);
-enum pm_ret_status pm_clock_get_parent(uint32_t clk_id, uint32_t *parent);
-enum pm_ret_status pm_clock_get_rate(uint32_t clk_id, uint32_t *clk_rate);
+					    uint32_t *value, uint32_t flag);
+enum pm_ret_status pm_clock_enable(uint32_t clk_id, uint32_t flag);
+enum pm_ret_status pm_clock_disable(uint32_t clk_id, uint32_t flag);
+enum pm_ret_status pm_clock_get_state(uint32_t clk_id, uint32_t *state,
+				      uint32_t flag);
+enum pm_ret_status pm_clock_set_divider(uint32_t clk_id, uint32_t divider,
+					uint32_t flag);
+enum pm_ret_status pm_clock_get_divider(uint32_t clk_id, uint32_t *divider,
+					uint32_t flag);
+enum pm_ret_status pm_clock_set_parent(uint32_t clk_id, uint32_t parent,
+				       uint32_t flag);
+enum pm_ret_status pm_clock_get_parent(uint32_t clk_id, uint32_t *parent,
+				       uint32_t flag);
+enum pm_ret_status pm_clock_get_rate(uint32_t clk_id, uint32_t *clk_rate,
+				     uint32_t flag);
 enum pm_ret_status pm_pll_set_param(uint32_t clk_id, uint32_t param,
-				    uint32_t value);
+				    uint32_t value, uint32_t flag);
 enum pm_ret_status pm_pll_get_param(uint32_t clk_id, uint32_t param,
-				    uint32_t *value);
-enum pm_ret_status pm_pll_set_mode(uint32_t clk_id, uint32_t mode);
-enum pm_ret_status pm_pll_get_mode(uint32_t clk_id, uint32_t *mode);
-enum pm_ret_status pm_force_powerdown(uint32_t target, uint8_t ack);
-enum pm_ret_status pm_system_shutdown(uint32_t type, uint32_t subtype);
+				    uint32_t *value, uint32_t flag);
+enum pm_ret_status pm_pll_set_mode(uint32_t clk_id, uint32_t mode,
+				   uint32_t flag);
+enum pm_ret_status pm_pll_get_mode(uint32_t clk_id, uint32_t *mode,
+				   uint32_t flag);
+enum pm_ret_status pm_force_powerdown(uint32_t target, uint8_t ack,
+				      uint32_t flag);
+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 arg1, uint32_t arg2, 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 arg3, uint32_t *data, uint32_t flag);
 unsigned int pm_get_shutdown_scope(void);
-enum pm_ret_status pm_get_chipid(uint32_t *value);
-enum pm_ret_status pm_feature_check(uint32_t api_id, unsigned int *version);
+enum pm_ret_status pm_get_chipid(uint32_t *value, uint32_t flag);
+enum pm_ret_status pm_feature_check(uint32_t api_id, unsigned int *version,
+				    uint32_t flag);
 enum pm_ret_status pm_load_pdi(uint32_t src, uint32_t address_low,
-			       uint32_t address_high);
+			       uint32_t address_high, uint32_t flag);
 enum pm_ret_status pm_get_op_characteristic(uint32_t device_id,
 					    enum pm_opchar_type type,
-					    uint32_t *result);
-enum pm_ret_status pm_set_max_latency(uint32_t device_id, uint32_t latency);
+					    uint32_t *result, uint32_t flag);
+enum pm_ret_status pm_set_max_latency(uint32_t device_id, uint32_t latency,
+				      uint32_t flag);
 enum pm_ret_status pm_register_notifier(uint32_t device_id, uint32_t event,
-					uint32_t wake, uint32_t enable);
+					uint32_t wake, uint32_t enable,
+					uint32_t flag);
 #endif /* PM_API_SYS_H */
diff --git a/plat/xilinx/versal/pm_service/pm_client.c b/plat/xilinx/versal/pm_service/pm_client.c
index 9ab921e..f6c3148 100644
--- a/plat/xilinx/versal/pm_service/pm_client.c
+++ b/plat/xilinx/versal/pm_service/pm_client.c
@@ -149,7 +149,8 @@
 				/* Get device ID from node index */
 				device_id = PERIPH_DEVID(node_idx);
 				ret = pm_set_wakeup_source(node_id,
-							   device_id, 1);
+							   device_id, 1,
+							   SECURE_FLAG);
 				pm_wakeup_nodes_set[node_idx] = !ret;
 			}
 		}
diff --git a/plat/xilinx/versal/pm_service/pm_svc_main.c b/plat/xilinx/versal/pm_service/pm_svc_main.c
index 2ed6d27..55a0956 100644
--- a/plat/xilinx/versal/pm_service/pm_svc_main.c
+++ b/plat/xilinx/versal/pm_service/pm_svc_main.c
@@ -71,6 +71,7 @@
 	enum pm_ret_status ret;
 
 	uint32_t pm_arg[4];
+	uint32_t security_flag = SECURE_FLAG;
 
 	/* Handle case where PM wasn't initialized properly */
 	if (!pm_up)
@@ -81,57 +82,67 @@
 	pm_arg[2] = (uint32_t)x2;
 	pm_arg[3] = (uint32_t)(x2 >> 32);
 
+	/*
+	 * Mark BIT24 payload (i.e 1st bit of pm_arg[3] ) as non-secure (1)
+	 * if smc called is non secure
+	 */
+	if (is_caller_non_secure(flags)) {
+		security_flag = NON_SECURE_FLAG;
+	}
+
 	switch (smc_fid & FUNCID_NUM_MASK) {
 	/* PM API Functions */
 	case PM_SELF_SUSPEND:
 		ret = pm_self_suspend(pm_arg[0], pm_arg[1], pm_arg[2],
-				      pm_arg[3]);
+				      pm_arg[3], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_FORCE_POWERDOWN:
-		ret = pm_force_powerdown(pm_arg[0], pm_arg[1]);
+		ret = pm_force_powerdown(pm_arg[0], pm_arg[1], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_REQ_SUSPEND:
 		ret = pm_req_suspend(pm_arg[0], pm_arg[1], pm_arg[2],
-				     pm_arg[3]);
+				     pm_arg[3], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_ABORT_SUSPEND:
-		ret = pm_abort_suspend(pm_arg[0]);
+		ret = pm_abort_suspend(pm_arg[0], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_SYSTEM_SHUTDOWN:
-		ret = pm_system_shutdown(pm_arg[0], pm_arg[1]);
+		ret = pm_system_shutdown(pm_arg[0], pm_arg[1], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_REQ_WAKEUP:
-		ret = pm_req_wakeup(pm_arg[0], pm_arg[1], pm_arg[2], pm_arg[3]);
+		ret = pm_req_wakeup(pm_arg[0], pm_arg[1], pm_arg[2], pm_arg[3],
+				    security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_SET_WAKEUP_SOURCE:
-		ret = pm_set_wakeup_source(pm_arg[0], pm_arg[1], pm_arg[2]);
+		ret = pm_set_wakeup_source(pm_arg[0], pm_arg[1], pm_arg[2],
+					   security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_REQUEST_DEVICE:
 		ret = pm_request_device(pm_arg[0], pm_arg[1], pm_arg[2],
-					pm_arg[3]);
+					pm_arg[3], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_RELEASE_DEVICE:
-		ret = pm_release_device(pm_arg[0]);
+		ret = pm_release_device(pm_arg[0], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_SET_REQUIREMENT:
 		ret = pm_set_requirement(pm_arg[0], pm_arg[1], pm_arg[2],
-					 pm_arg[3]);
+					 pm_arg[3], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_GET_API_VERSION:
 	{
 		uint32_t api_version;
 
-		ret = pm_get_api_version(&api_version);
+		ret = pm_get_api_version(&api_version, security_flag);
 		SMC_RET1(handle, (uint64_t)PM_RET_SUCCESS |
 				 ((uint64_t)api_version << 32));
 	}
@@ -140,68 +151,72 @@
 	{
 		uint32_t buff[3];
 
-		ret = pm_get_device_status(pm_arg[0], buff);
+		ret = pm_get_device_status(pm_arg[0], buff, security_flag);
 		SMC_RET2(handle, (uint64_t)ret | ((uint64_t)buff[0] << 32),
 			 (uint64_t)buff[1] | ((uint64_t)buff[2] << 32));
 	}
 
 	case PM_RESET_ASSERT:
-		ret = pm_reset_assert(pm_arg[0], pm_arg[1]);
+		ret = pm_reset_assert(pm_arg[0], pm_arg[1], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_RESET_GET_STATUS:
 	{
 		uint32_t reset_status;
 
-		ret = pm_reset_get_status(pm_arg[0], &reset_status);
+		ret = pm_reset_get_status(pm_arg[0], &reset_status,
+					  security_flag);
 		SMC_RET1(handle, (uint64_t)ret |
 			 ((uint64_t)reset_status << 32));
 	}
 
 	case PM_INIT_FINALIZE:
-		ret = pm_init_finalize();
+		ret = pm_init_finalize(security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_GET_CALLBACK_DATA:
 	{
 		uint32_t result[4] = {0};
 
-		pm_get_callbackdata(result, ARRAY_SIZE(result));
+		pm_get_callbackdata(result, ARRAY_SIZE(result), security_flag);
 		SMC_RET2(handle,
 			 (uint64_t)result[0] | ((uint64_t)result[1] << 32),
 			 (uint64_t)result[2] | ((uint64_t)result[3] << 32));
 	}
 
 	case PM_PINCTRL_REQUEST:
-		ret = pm_pinctrl_request(pm_arg[0]);
+		ret = pm_pinctrl_request(pm_arg[0], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_PINCTRL_RELEASE:
-		ret = pm_pinctrl_release(pm_arg[0]);
+		ret = pm_pinctrl_release(pm_arg[0], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_PINCTRL_GET_FUNCTION:
 	{
 		uint32_t value = 0;
 
-		ret = pm_pinctrl_get_function(pm_arg[0], &value);
+		ret = pm_pinctrl_get_function(pm_arg[0], &value, security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
 	}
 
 	case PM_PINCTRL_SET_FUNCTION:
-		ret = pm_pinctrl_set_function(pm_arg[0], pm_arg[1]);
+		ret = pm_pinctrl_set_function(pm_arg[0], pm_arg[1],
+					      security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_PINCTRL_CONFIG_PARAM_GET:
 	{
 		uint32_t value;
 
-		ret = pm_pinctrl_get_pin_param(pm_arg[0], pm_arg[1], &value);
+		ret = pm_pinctrl_get_pin_param(pm_arg[0], pm_arg[1], &value,
+					       security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
 	}
 
 	case PM_PINCTRL_CONFIG_PARAM_SET:
-		ret = pm_pinctrl_set_pin_param(pm_arg[0], pm_arg[1], pm_arg[2]);
+		ret = pm_pinctrl_set_pin_param(pm_arg[0], pm_arg[1], pm_arg[2],
+					       security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_IOCTL:
@@ -209,7 +224,7 @@
 		uint32_t value;
 
 		ret = pm_api_ioctl(pm_arg[0], pm_arg[1], pm_arg[2],
-				   pm_arg[3], &value);
+				   pm_arg[3], &value, security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
 	}
 
@@ -218,49 +233,49 @@
 		uint32_t data[8] = { 0 };
 
 		ret = pm_query_data(pm_arg[0], pm_arg[1], pm_arg[2],
-				      pm_arg[3], data);
+				      pm_arg[3], data, security_flag);
 
 		SMC_RET2(handle, (uint64_t)ret  | ((uint64_t)data[0] << 32),
 				 (uint64_t)data[1] | ((uint64_t)data[2] << 32));
 
 	}
 	case PM_CLOCK_ENABLE:
-		ret = pm_clock_enable(pm_arg[0]);
+		ret = pm_clock_enable(pm_arg[0], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_CLOCK_DISABLE:
-		ret = pm_clock_disable(pm_arg[0]);
+		ret = pm_clock_disable(pm_arg[0], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_CLOCK_GETSTATE:
 	{
 		uint32_t value;
 
-		ret = pm_clock_get_state(pm_arg[0], &value);
+		ret = pm_clock_get_state(pm_arg[0], &value, security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
 	}
 
 	case PM_CLOCK_SETDIVIDER:
-		ret = pm_clock_set_divider(pm_arg[0], pm_arg[1]);
+		ret = pm_clock_set_divider(pm_arg[0], pm_arg[1], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_CLOCK_GETDIVIDER:
 	{
 		uint32_t value;
 
-		ret = pm_clock_get_divider(pm_arg[0], &value);
+		ret = pm_clock_get_divider(pm_arg[0], &value, security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
 	}
 
 	case PM_CLOCK_SETPARENT:
-		ret = pm_clock_set_parent(pm_arg[0], pm_arg[1]);
+		ret = pm_clock_set_parent(pm_arg[0], pm_arg[1], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_CLOCK_GETPARENT:
 	{
 		uint32_t value;
 
-		ret = pm_clock_get_parent(pm_arg[0], &value);
+		ret = pm_clock_get_parent(pm_arg[0], &value, security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
 	}
 
@@ -268,32 +283,34 @@
 	{
 		uint32_t rate[2] = { 0 };
 
-		ret = pm_clock_get_rate(pm_arg[0], rate);
+		ret = pm_clock_get_rate(pm_arg[0], rate, security_flag);
 		SMC_RET2(handle, (uint64_t)ret | ((uint64_t)rate[0] << 32),
 			 rate[1]);
 	}
 
 	case PM_PLL_SET_PARAMETER:
-		ret = pm_pll_set_param(pm_arg[0], pm_arg[1], pm_arg[2]);
+		ret = pm_pll_set_param(pm_arg[0], pm_arg[1], pm_arg[2],
+				       security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_PLL_GET_PARAMETER:
 	{
 		uint32_t value;
 
-		ret = pm_pll_get_param(pm_arg[0], pm_arg[1], &value);
+		ret = pm_pll_get_param(pm_arg[0], pm_arg[1], &value,
+				       security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value << 32));
 	}
 
 	case PM_PLL_SET_MODE:
-		ret = pm_pll_set_mode(pm_arg[0], pm_arg[1]);
+		ret = pm_pll_set_mode(pm_arg[0], pm_arg[1], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 
 	case PM_PLL_GET_MODE:
 	{
 		uint32_t mode;
 
-		ret = pm_pll_get_mode(pm_arg[0], &mode);
+		ret = pm_pll_get_mode(pm_arg[0], &mode, security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)mode << 32));
 	}
 
@@ -305,7 +322,7 @@
 	{
 		uint32_t result[2];
 
-		ret = pm_get_chipid(result);
+		ret = pm_get_chipid(result, security_flag);
 		SMC_RET2(handle, (uint64_t)ret | ((uint64_t)result[0] << 32),
 			 result[1]);
 	}
@@ -314,13 +331,14 @@
 	{
 		uint32_t version;
 
-		ret = pm_feature_check(pm_arg[0], &version);
+		ret = pm_feature_check(pm_arg[0], &version, security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)version << 32));
 	}
 
 	case PM_LOAD_PDI:
 	{
-		ret = pm_load_pdi(pm_arg[0], pm_arg[1], pm_arg[2]);
+		ret = pm_load_pdi(pm_arg[0], pm_arg[1], pm_arg[2],
+				  security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 	}
 
@@ -328,19 +346,21 @@
 	{
 		uint32_t result;
 
-		ret = pm_get_op_characteristic(pm_arg[0], pm_arg[1], &result);
+		ret = pm_get_op_characteristic(pm_arg[0], pm_arg[1], &result,
+					       security_flag);
 		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)result << 32));
 	}
 
 	case PM_SET_MAX_LATENCY:
 	{
-		ret = pm_set_max_latency(pm_arg[0], pm_arg[1]);
+		ret = pm_set_max_latency(pm_arg[0], pm_arg[1], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 	}
 
 	case PM_REGISTER_NOTIFIER:
 	{
-		ret = pm_register_notifier(pm_arg[0], pm_arg[1], pm_arg[2], pm_arg[3]);
+		ret = pm_register_notifier(pm_arg[0], pm_arg[1], pm_arg[2],
+					   pm_arg[3], security_flag);
 		SMC_RET1(handle, (uint64_t)ret);
 	}