diff --git a/Makefile b/Makefile
index 61f4451..0ffdc27 100644
--- a/Makefile
+++ b/Makefile
@@ -386,6 +386,10 @@
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105523
 TF_CFLAGS		+= 	$(call cc_option, --param=min-pagesize=0)
 
+ifeq ($(HARDEN_SLS), 1)
+        TF_CFLAGS_aarch64       +=      $(call cc_option, -mharden-sls=all)
+endif
+
 else
 # using clang
 WARNINGS	+=		-Wshift-overflow -Wshift-sign-overflow \
@@ -1049,6 +1053,7 @@
         GENERATE_COT \
         GICV2_G0_FOR_EL3 \
         HANDLE_EA_EL3_FIRST_NS \
+	HARDEN_SLS \
         HW_ASSISTED_COHERENCY \
         INVERTED_MEMMAP \
         MEASURED_BOOT \
diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst
index 3ebdbcc..d80a97f 100644
--- a/docs/getting_started/build-options.rst
+++ b/docs/getting_started/build-options.rst
@@ -671,6 +671,19 @@
 
    This option defaults to 0.
 
+-  ``HARDEN_SLS``: used to pass -mharden-sls=all from the TF-A build
+   options to the compiler currently supporting only of the options.
+   GCC documentation:
+   https://gcc.gnu.org/onlinedocs/gcc/AArch64-Options.html#index-mharden-sls
+
+   An example usage:
+
+   .. code:: make
+
+      HARDEN_SLS := 1
+
+   This option defaults to 0.
+
 -  ``NON_TRUSTED_WORLD_KEY``: This option is used when ``GENERATE_COT=1``. It
    specifies the file that contains the Non-Trusted World private key in PEM
    format. If ``SAVE_KEYS=1``, this file name will be used to save the key.
diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 61e9dd6..d9c6483 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -220,6 +220,10 @@
 # by lower ELs.
 HANDLE_EA_EL3_FIRST_NS		:= 0
 
+# Enables support for the gcc compiler option "-mharden-sls=all".
+# By default, disables all SLS hardening.
+HARDEN_SLS			:= 0
+
 # Secure hash algorithm flag, accepts 3 values: sha256, sha384 and sha512.
 # The default value is sha256.
 HASH_ALG			:= sha256