commit fbc44bd1bbbafe01848afd009d507b595b264b5f
author Varun Wadekar <vwadekar@nvidia.com> Fri Jun 12 10:11:28 2020 -0700
committer Varun Wadekar <vwadekar@nvidia.com> Fri Jun 12 10:20:11 2020 -0700
tree 67431f3739b10391c78b582f53c371f3ef41d1c8
parent 0d8511953e19a5da80ac1a0ed9ec8e76b57a33a8

Prevent RAS register access from lower ELs

This patch adds a build config 'RAS_TRAP_LOWER_EL_ERR_ACCESS' to set
SCR_EL3.TERR during CPU boot. This bit enables trapping RAS register
accesses from EL1 or EL2 to EL3.

RAS_TRAP_LOWER_EL_ERR_ACCESS is disabled by default.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: Ifb0fb0afedea7dd2a29a0b0491a1161ecd241438

make_helpers/defaults.mk

diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 585f06f..6db228f 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -302,3 +302,6 @@
 
 # Select workaround for AT speculative behaviour.
 ERRATA_SPECULATIVE_AT           := 0
+
+# Trap RAS error record access from lower EL
+RAS_TRAP_LOWER_EL_ERR_ACCESS	:= 0