fix(spmd): coverity scan issues

Coverity defects fixed by this patch are:
*** CID 400208:  Performance inefficiencies  (PASS_BY_VALUE)
/include/services/el3_spmd_logical_sp.h: 108 in
ffa_partition_info_regs_get_last_idx()

*** CID 400207:  Performance inefficiencies  (PASS_BY_VALUE)
/services/std_svc/spmd/spmd_logical_sp.c: 359 in
ffa_partition_info_regs_get_part_info()

Signed-off-by: Raghu Krishnamurthy <raghu.ncstate@gmail.com>
Change-Id: I9597377a8ec3d5519995e1619d99ee7102f33939

include/services/el3_spmd_logical_sp.h

@@ -105,33 +105,33 @@ static inline bool is_ffa_direct_msg_resp(struct ffa_value *retval)
 }
 
 static inline uint16_t ffa_partition_info_regs_get_last_idx(
-	struct ffa_value args)
+	struct ffa_value *args)
 {
-	return (uint16_t)(args.arg2 & 0xFFFFU);
+	return (uint16_t)(args->arg2 & 0xFFFFU);
 }
 
 static inline uint16_t ffa_partition_info_regs_get_curr_idx(
-	struct ffa_value args)
+	struct ffa_value *args)
 {
-	return (uint16_t)((args.arg2 >> 16) & 0xFFFFU);
+	return (uint16_t)((args->arg2 >> 16) & 0xFFFFU);
 }
 
-static inline uint16_t ffa_partition_info_regs_get_tag(struct ffa_value args)
+static inline uint16_t ffa_partition_info_regs_get_tag(struct ffa_value *args)
 {
-	return (uint16_t)((args.arg2 >> 32) & 0xFFFFU);
+	return (uint16_t)((args->arg2 >> 32) & 0xFFFFU);
 }
 
 static inline uint16_t ffa_partition_info_regs_get_desc_size(
-	struct ffa_value args)
+	struct ffa_value *args)
 {
-	return (uint16_t)(args.arg2 >> 48);
+	return (uint16_t)(args->arg2 >> 48);
 }
 
 uint64_t spmd_el3_populate_logical_partition_info(void *handle, uint64_t x1,
 						  uint64_t x2, uint64_t x3);
 
 bool ffa_partition_info_regs_get_part_info(
-	struct ffa_value args, uint8_t idx,
+	struct ffa_value *args, uint8_t idx,
 	struct ffa_partition_info_v1_1 *partition_info);
 
 bool spmd_el3_invoke_partition_info_get(

plat/arm/board/fvp/fvp_spmd_logical_sp.c

@@ -32,7 +32,7 @@ static void fvp_get_partition_info(void)
 		panic();
 	}
 
-	num_partitions = ffa_partition_info_regs_get_last_idx(ret) + 1;
+	num_partitions = ffa_partition_info_regs_get_last_idx(&ret) + 1;
 	if (num_partitions > SPMD_LP_MAX_SUPPORTED_SP) {
 		panic();
 	}
@@ -41,7 +41,7 @@ static void fvp_get_partition_info(void)
 
 	for (uint16_t i = 0; i < num_partitions; i++) {
 		INFO("***Start Partition***\n");
-		if (!ffa_partition_info_regs_get_part_info(ret, i, &part_info[i]))
+		if (!ffa_partition_info_regs_get_part_info(&ret, i, &part_info[i]))
 			panic();
 		INFO("\tPartition ID: 0x%x\n", part_info[i].ep_id);
 		INFO("\tvCPU count:0x%x\n", part_info[i].execution_ctx_count);

services/std_svc/spmd/spmd_logical_sp.c

@@ -356,7 +356,7 @@ void spmd_logical_sp_set_spmc_failure(void)
  * other code to consume.
  */
 bool ffa_partition_info_regs_get_part_info(
-	struct ffa_value args, uint8_t idx,
+	struct ffa_value *args, uint8_t idx,
 	struct ffa_partition_info_v1_1 *partition_info)
 {
 	uint64_t *arg_ptrs;
@@ -375,7 +375,7 @@ bool ffa_partition_info_regs_get_part_info(
 	 * function, arg1 is reserved, arg2 encodes indices. arg3 and greater
 	 * values reflect partition properties.
 	 */
-	arg_ptrs = (uint64_t *)&args + ((idx * 3) + 3);
+	arg_ptrs = (uint64_t *)args + ((idx * 3) + 3);
 	info = *arg_ptrs;
 
 	arg_ptrs++;