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Enable MTE support 

Enable MTE support by adding memory tag option in Makefile
This option is available only when ARMv8.5-MemTag is implemented

MTE options are added in latest clang and armclang compiler which
support below options:
for clang <version 11.0.0>
1. -march=arm8.5-a+memtag
2. -fsanitize=memtag

for armclang <version 6.12>
1. -march=arm8.5-a+memtag
2. -mmemtag-stack

Set the option SUPPORT_STACK_MEMTAG=yes to enable memory stack tagging.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I4e0bbde4e9769ce03ead6f550158e22f32c1c413
This commit is contained in:
Manish V Badarkhe 2020-03-22 05:06:38 +00:00 committed by Sandrine Bailleux
parent 0a43db84af
commit 7ff088d1f0
3 changed files with 38 additions and 0 deletions
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28
Makefile
View File

@ -187,6 +187,34 @@ march64-directive = -march=armv8.${ARM_ARCH_MINOR}-a
endif
endif
# Memory tagging is supported in architecture Armv8.5-A AArch64 and onwards
ifeq ($(ARCH), aarch64)
ifeq ($(shell test $(ARM_ARCH_MAJOR) -gt 8; echo $$?),0)
mem_tag_arch_support = yes
else ifeq ($(shell test $(ARM_ARCH_MAJOR) -eq 8 -a $(ARM_ARCH_MINOR) -ge 5; \
echo $$?),0)
mem_tag_arch_support = yes
endif
endif
# Enabled required option for memory stack tagging. Currently, these options are
# enabled only for clang and armclang compiler.
ifeq (${SUPPORT_STACK_MEMTAG},yes)
ifdef mem_tag_arch_support
ifneq ( ,$(filter $(notdir $(CC)),armclang clang))
march64-directive = -march=armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a+memtag
ifeq ($(notdir $(CC)),armclang)
TF_CFLAGS += -mmemtag-stack
else ifeq ($(notdir $(CC)),clang)
TF_CFLAGS += -fsanitize=memtag
endif
endif
else
$(error "Error: stack memory tagging is not supported for architecture \
${ARCH},armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a")
endif
endif
ifneq ($(findstring armclang,$(notdir $(CC))),)
TF_CFLAGS_aarch32 = -target arm-arm-none-eabi $(march32-directive)
TF_CFLAGS_aarch64 = -target aarch64-arm-none-eabi $(march64-directive)

5
docs/getting_started/build-options.rst
View File

@ -667,6 +667,11 @@ Common build options
cluster platforms). If this option is enabled, then warm boot path
enables D-caches immediately after enabling MMU. This option defaults to 0.
- ``SUPPORT_STACK_MEMTAG``: This flag determines whether to enable memory
tagging for stack or not. It accepts 2 values: ``yes`` and ``no``. The
default value of this flag is ``no``. Note this option must be enabled only
for ARM architecture greater than Armv8.5-A.
GICv3 driver options
--------------------

5
make_helpers/defaults.mk
View File

@ -288,3 +288,8 @@ ENABLE_LTO := 0
# S-EL2 firmware entry/exit. This flag is to be used with SPD=spmd option.
# Default is 0.
CTX_INCLUDE_EL2_REGS := 0
# Enable Memory tag extension which is supported for architecture greater
# than Armv8.5-A
# By default it is set to "no"
SUPPORT_STACK_MEMTAG := no