diff --git a/services/std_svc/spm/el3_spmc/spmc_setup.c b/services/std_svc/spm/el3_spmc/spmc_setup.c
index 7b23c9e3b..af5219d02 100644
--- a/services/std_svc/spm/el3_spmc/spmc_setup.c
+++ b/services/std_svc/spm/el3_spmc/spmc_setup.c
@@ -43,6 +43,12 @@ void spmc_el1_sp_setup(struct secure_partition_desc *sp,
 	ep_info->spsr =	SPSR_64(MODE_EL1, MODE_SP_ELX,
 				DISABLE_ALL_EXCEPTIONS);
 
+	/*
+	 * TF-A Implementation defined behaviour to provide the linear
+	 * core ID in the x4 register.
+	 */
+	ep_info->args.arg4 = (uintptr_t) plat_my_core_pos();
+
 	/*
 	 * Check whether setup is being performed for the primary or a secondary
 	 * execution context. In the latter case, indicate to the SP that this