commit a1c3ccac84390d46d72f27b46a92262f995418d2
author Jeenu Viswambharan <jeenu.viswambharan@arm.com> Tue Oct 16 10:09:32 2018 +0100
committer Sandrine Bailleux <sandrine.bailleux@arm.com> Wed Oct 31 14:35:18 2018 +0000
tree 1f1982ce5a284dffcc285aca83cbf2ddb3803723
parent 7ab07c5748ed0d365140e4fcaf495a2572d8e698

Introduce test to access pointer authentication register

EL3 runtime firmware currently enables unconditional access to pointer
authentication registers from lower EL [1]. The test performs a read
access on a pointer authentication system register to ensure that the
access is permitted from a lower EL, and doesn't result in a trap to
EL3.

[1] https://github.com/ARM-software/arm-trusted-firmware/commit/3ff4aaaca44b75504aec5ab5b72cd587a6fcd432

Change-Id: I893604ebcd9e5df830d97cce405c2a7518c0b23c
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

include/lib/aarch64/arch_helpers.h

diff --git a/include/lib/aarch64/arch_helpers.h b/include/lib/aarch64/arch_helpers.h
index c313d60..0bd52de 100644
--- a/include/lib/aarch64/arch_helpers.h
+++ b/include/lib/aarch64/arch_helpers.h
@@ -128,6 +128,7 @@
  ******************************************************************************/
 
 DEFINE_SYSREG_READ_FUNC(id_pfr1_el1)
+DEFINE_SYSREG_READ_FUNC(id_aa64isar1_el1)
 DEFINE_SYSREG_READ_FUNC(id_aa64pfr0_el1)
 DEFINE_SYSREG_READ_FUNC(CurrentEl)
 DEFINE_SYSREG_READ_FUNC(ctr_el0)
@@ -323,6 +324,9 @@
 DEFINE_RENAME_SYSREG_RW_FUNCS(amcntenclr1_el0, AMCNTENCLR1_EL0)
 DEFINE_RENAME_SYSREG_RW_FUNCS(amcntenset1_el0, AMCNTENSET1_EL0)
 
+/* Armv8.3 Pointer Authentication Registers */
+DEFINE_RENAME_SYSREG_RW_FUNCS(apgakeylo_el1, APGAKeyLo_EL1)
+
 #define IS_IN_EL(x) \
 	(GET_EL(read_CurrentEl()) == MODE_EL##x)