Add ARMv8.3 pointer authentication support
ARMv8.3-PAuth adds functionality that supports address authentication of
the contents of a register before that register is used as the target of
an indirect branch, or as a load.
This feature is supported only in AArch64 state.
This feature is mandatory in ARMv8.3 implementations.
This patch adds the functionality needed for platforms to provide
authentication keys for the TF-A Test Framework, and a new option
(ENABLE_PAUTH) to enable pointer authentication in the framework itself.
This option is disabled by default.
Pointer authentication support has been added to FVP.
Change-Id: Id2d5c978deb68ae60107879f1c3d0b231cba9f42
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/docs/user-guide.rst b/docs/user-guide.rst
index c9559d2..5bfab79 100644
--- a/docs/user-guide.rst
+++ b/docs/user-guide.rst
@@ -362,6 +362,11 @@
TFTF build options
''''''''''''''''''
+- ``ENABLE_PAUTH``: Boolean option to enable ARMv8.3 Pointer Authentication
+ (``ARMv8.3-PAuth``) support in the Trusted Firmware-A Test Framework itself.
+ If enabled, it is needed to use a compiler that supports the option
+ ``-msign-return-address``. It defaults to 0.
+
- ``NEW_TEST_SESSION``: Choose whether a new test session should be started
every time or whether the framework should determine whether a previous
session was interrupted and resume it. It can take either 1 (always