fix(cpus): workaround for Neoverse-N2 erratum 3701773
Neoverse-N2 erratum 3701773 that applies to r0p0, r0p1, r0p2 and r0p3
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-1982442/latest/
Change-Id: If95bd67363228c8083724b31f630636fb27f3b61
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/lib/cpus/errata_common.c b/lib/cpus/errata_common.c
index 7f025b4..3944fc0 100644
--- a/lib/cpus/errata_common.c
+++ b/lib/cpus/errata_common.c
@@ -21,6 +21,7 @@
#include <cortex_x925.h>
#include <lib/cpus/cpu_ops.h>
#include <lib/cpus/errata.h>
+#include <neoverse_n2.h>
#if ERRATA_A520_2938996 || ERRATA_X4_2726228
unsigned int check_if_affected_core(void)
@@ -114,6 +115,14 @@
return true;
break;
#endif /* ERRATA_X925_3701747 */
+
+#if ERRATA_N2_3701773
+ case EXTRACT_PARTNUM(NEOVERSE_N2_MIDR):
+ if (check_erratum_neoverse_n2_3701773(cpu_get_rev_var()) == ERRATA_APPLIES)
+ return true;
+ break;
+#endif /* ERRATA_N2_3701773 */
+
default:
break;
}