fix(cpus): workaround for Cortex-A720-AE erratum 3699562
Cortex-A720-AE erratum 3699562 that applies to r0p0 and is still
Open.
The workaround is for EL3 software that performs context save/restore
on a change of Security state to use a value of SCR_EL3.NS when
accessing ICH_VMCR_EL2 that reflects the Security state that owns the
data being saved or restored.
SDEN documentation:
https://developer.arm.com/documentation/SDEN-3090091/latest/
Change-Id: Ib830470747822cac916750c01684a65cb5efc15b
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 68a50fc..75d5ad2 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -1015,6 +1015,11 @@
# the Cortex-A720 cpu and is still open.
CPU_FLAG_LIST += ERRATA_A720_3699561
+# Flag to apply erratum 3699562 workaround during context save/restore of
+# ICH_VMCR_EL2 reg. This erratum applies to revision r0p0 the Cortex-A720-AE
+# cpu and is still open.
+CPU_FLAG_LIST += ERRATA_A720_AE_3699562
+
# Flag to apply DSU erratum 798953. This erratum applies to DSUs revision r0p0.
# Applying the workaround results in higher DSU power consumption on idle.
CPU_FLAG_LIST += ERRATA_DSU_798953