TF-A: Add build option for Arm Feature Modifiers
This patch adds a new ARM_ARCH_FEATURE build option
to add support for compiler's feature modifiers.
It has the form '[no]feature+...' and defaults to
'none'. This option translates into compiler option
'-march=armvX[.Y]-a+[no]feature+...'.
Change-Id: I37742f270a898f5d6968e146cbcc04cbf53ef2ad
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
diff --git a/Makefile b/Makefile
index 5c9186e..f950eb8 100644
--- a/Makefile
+++ b/Makefile
@@ -185,13 +185,14 @@
else
target32-directive = -target armv8a-none-eabi
-# Set the compiler's target architecture profile based on ARM_ARCH_MINOR option
+# Set the compiler's target architecture profile based on
+# ARM_ARCH_MAJOR ARM_ARCH_MINOR options
ifeq (${ARM_ARCH_MINOR},0)
-march32-directive = -march=armv8-a
-march64-directive = -march=armv8-a
+march32-directive = -march=armv${ARM_ARCH_MAJOR}-a
+march64-directive = -march=armv${ARM_ARCH_MAJOR}-a
else
-march32-directive = -march=armv8.${ARM_ARCH_MINOR}-a
-march64-directive = -march=armv8.${ARM_ARCH_MINOR}-a
+march32-directive = -march=armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a
+march64-directive = -march=armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a
endif
endif
@@ -203,23 +204,43 @@
endif
endif
-# Enabled required option for memory stack tagging. Currently, these options are
-# enabled only for clang and armclang compiler.
+# Get architecture feature modifiers
+arch-features = ${ARM_ARCH_FEATURE}
+
+# Enable required options for memory stack tagging.
+# Currently, these options are enabled only for clang and armclang compiler.
ifeq (${SUPPORT_STACK_MEMTAG},yes)
ifdef mem_tag_arch_support
+# Check for armclang and clang compilers
ifneq ( ,$(filter $(notdir $(CC)),armclang clang))
-march64-directive = -march=armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a+memtag
+# Add "memtag" architecture feature modifier if not specified
+ifeq ( ,$(findstring memtag,$(arch-features)))
+arch-features := $(arch-features)+memtag
+endif # memtag
ifeq ($(notdir $(CC)),armclang)
TF_CFLAGS += -mmemtag-stack
else ifeq ($(notdir $(CC)),clang)
TF_CFLAGS += -fsanitize=memtag
-endif
-endif
+endif # armclang
+endif # armclang clang
else
$(error "Error: stack memory tagging is not supported for architecture \
${ARCH},armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a")
-endif
+endif # mem_tag_arch_support
+endif # SUPPORT_STACK_MEMTAG
+
+# Set the compiler's architecture feature modifiers
+ifneq ($(arch-features), none)
+# Strip "none+" from arch-features
+arch-features := $(subst none+,,$(arch-features))
+ifeq ($(ARCH), aarch32)
+march32-directive := $(march32-directive)+$(arch-features)
+else
+march64-directive := $(march64-directive)+$(arch-features)
endif
+# Print features
+$(info Arm Architecture Features specified: $(subst +, ,$(arch-features)))
+endif # arch-features
ifneq ($(findstring armclang,$(notdir $(CC))),)
TF_CFLAGS_aarch32 = -target arm-arm-none-eabi $(march32-directive)