diff --git a/fvp_ffa.mk b/fvp_ffa.mk
index 43e3986..5ef3c04 100644
--- a/fvp_ffa.mk
+++ b/fvp_ffa.mk
@@ -269,3 +269,8 @@
 	make -C $(CURDIR)/../linux_poc clean
 
 all: arm_ffa_user
+
+# Disable CONFIG_STRICT_DEVMEM option in the Linux kernel config. This allows userspace access to
+# the whole NS physical address space through /dev/mem.
+linux-defconfig:
+	cd $(LINUX_PATH) && ./scripts/config --disable CONFIG_STRICT_DEVMEM