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Change Statistical Profiling Extensions build option handling 

It is not possible to detect at compile-time whether support for an
optional extension such as SPE should be enabled based on the
ARM_ARCH_MINOR build option value.  Therefore SPE is now enabled by
default.

Change-Id: I670db164366aa78a7095de70a0962f7c0328ab7c
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
This commit is contained in:
Dimitris Papastamos 2017-10-13 15:07:45 +01:00
parent 0fd0f22298
commit c776deed60
2 changed files with 5 additions and 14 deletions
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6
docs/user-guide.rst
View File

@ -344,9 +344,9 @@ Common build options
the ``ENABLE_PMF`` build option as well. Default is 0.
- ``ENABLE_SPE_FOR_LOWER_ELS`` : Boolean option to enable Statistical Profiling
extensions. This is an optional architectural feature available only for
AArch64 8.2 onwards. This option defaults to 1 but is automatically
disabled when the target architecture is AArch32 or AArch64 8.0/8.1.
extensions. This is an optional architectural feature for AArch64.
The default is 1 but is automatically disabled when the target architecture
is AArch32.
- ``ENABLE_STACK_PROTECTOR``: String option to enable the stack protection
checks in GCC. Allowed values are "all", "strong" and "0" (default).

13
make_helpers/defaults.mk
View File

@ -149,19 +149,10 @@ V := 0
# platforms).
WARMBOOT_ENABLE_DCACHE_EARLY := 0
# By default, enable Statistical Profiling Extensions.
# The top level Makefile will disable this feature depending on
# the target architecture and version number.
# Build option to enable/disable the Statistical Profiling Extensions
ENABLE_SPE_FOR_LOWER_ELS := 1
# SPE is enabled by default but only supported on AArch64 8.2 onwards.
# Disable it in all other cases.
# SPE is only supported on AArch64 so disable it on AArch32.
ifeq (${ARCH},aarch32)
override ENABLE_SPE_FOR_LOWER_ELS := 0
else
ifeq (${ARM_ARCH_MAJOR},8)
ifeq ($(ARM_ARCH_MINOR),$(filter $(ARM_ARCH_MINOR),0 1))
ENABLE_SPE_FOR_LOWER_ELS := 0
endif
endif
endif