BL31: Enable pointer authentication support
The size increase after enabling options related to ARMv8.3-PAuth is:
+----------------------------+-------+-------+-------+--------+
| | text | bss | data | rodata |
+----------------------------+-------+-------+-------+--------+
| CTX_INCLUDE_PAUTH_REGS = 1 | +192 | +1536 | +0 | +0 |
| | 0.3% | 3.1% | | |
+----------------------------+-------+-------+-------+--------+
| ENABLE_PAUTH = 1 | +1848 | +1536 | +16 | +0 |
| | 3.3% | 3.1% | 3.1% | |
+----------------------------+-------+-------+-------+--------+
Results calculated with the following build configuration:
make PLAT=fvp SPD=tspd DEBUG=1 \
SDEI_SUPPORT=1 \
EL3_EXCEPTION_HANDLING=1 \
TSP_NS_INTR_ASYNC_PREEMPT=1 \
CTX_INCLUDE_PAUTH_REGS=1 \
ENABLE_PAUTH=1
Change-Id: I43db7e509a4f39da6599ec2faa690d197573ec1b
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/bl31/bl31_main.c b/bl31/bl31_main.c
index da35f75..aca16d6 100644
--- a/bl31/bl31_main.c
+++ b/bl31/bl31_main.c
@@ -64,6 +64,27 @@
}
/*******************************************************************************
+ * Setup function for BL31.
+ ******************************************************************************/
+void bl31_setup(u_register_t arg0, u_register_t arg1, u_register_t arg2,
+ u_register_t arg3)
+{
+ /* Perform early platform-specific setup */
+ bl31_early_platform_setup2(arg0, arg1, arg2, arg3);
+
+ /*
+ * Update pointer authentication key before the MMU is enabled. It is
+ * saved in the rodata section, that can be writen before enabling the
+ * MMU. This function must be called after the console is initialized
+ * in the early platform setup.
+ */
+ bl_handle_pauth();
+
+ /* Perform late platform-specific setup */
+ bl31_plat_arch_setup();
+}
+
+/*******************************************************************************
* BL31 is responsible for setting up the runtime services for the primary cpu
* before passing control to the bootloader or an Operating System. This
* function calls runtime_svc_init() which initializes all registered runtime