diff --git a/drivers/arm/tzc/tzc400.c b/drivers/arm/tzc/tzc400.c
index 9fc1578..f1dacbb 100644
--- a/drivers/arm/tzc/tzc400.c
+++ b/drivers/arm/tzc/tzc400.c
@@ -68,6 +68,7 @@
 DEFINE_TZC_COMMON_WRITE_REGION_TOP(400, 400)
 DEFINE_TZC_COMMON_WRITE_REGION_ATTRIBUTES(400, 400)
 DEFINE_TZC_COMMON_WRITE_REGION_ID_ACCESS(400, 400)
+DEFINE_TZC_COMMON_UPDATE_FILTERS(400, 400)
 DEFINE_TZC_COMMON_CONFIGURE_REGION0(400)
 DEFINE_TZC_COMMON_CONFIGURE_REGION(400)
 
@@ -271,6 +272,15 @@
 						sec_attr, nsaid_permissions);
 }
 
+void tzc400_update_filters(unsigned int region, unsigned int filters)
+{
+	/* Do range checks on filters and regions. */
+	assert(((filters >> tzc400.num_filters) == 0U) &&
+	       (region < tzc400.num_regions));
+
+	_tzc400_update_filters(tzc400.base, region, tzc400.num_filters, filters);
+}
+
 void tzc400_enable_filters(void)
 {
 	unsigned int state;
diff --git a/drivers/arm/tzc/tzc_common_private.h b/drivers/arm/tzc/tzc_common_private.h
index 1d99077..2090944 100644
--- a/drivers/arm/tzc/tzc_common_private.h
+++ b/drivers/arm/tzc/tzc_common_private.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2021, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -90,6 +90,27 @@
 	}
 
 /*
+ * It is used to modify the filters status for a defined region.
+ */
+#define DEFINE_TZC_COMMON_UPDATE_FILTERS(fn_name, macro_name)		\
+	static inline void _tzc##fn_name##_update_filters(		\
+						uintptr_t base,		\
+						unsigned int region_no,	\
+						unsigned int nbfilters, \
+						unsigned int filters)	\
+	{								\
+		uint32_t filters_mask = GENMASK(nbfilters - 1U, 0);	\
+									\
+		mmio_clrsetbits_32(base +				\
+			TZC_REGION_OFFSET(				\
+				TZC_##macro_name##_REGION_SIZE,		\
+				region_no) +				\
+			TZC_##macro_name##_REGION_ATTR_0_OFFSET,	\
+			filters_mask << TZC_REGION_ATTR_F_EN_SHIFT,	\
+			filters << TZC_REGION_ATTR_F_EN_SHIFT);		\
+	}
+
+/*
  * It is used to program region 0 ATTRIBUTES and ACCESS register.
  */
 #define DEFINE_TZC_COMMON_CONFIGURE_REGION0(fn_name)			\