fix(cpus): workaround for Cortex-X3 erratum 2779509
Cortex-X3 erratum 2779509 is a Cat B erratum that applies to
all revisions <= r1p1 and is fixed in r1p2. The workaround is
to set chicken bit CPUACTLR3_EL1[47], this might have a small
impact on power and has negligible impact on performance.
SDEN documentation:
https://developer.arm.com/documentation/2055130/latest
Change-Id: Id92dbae6f1f313b133ffaa018fbf9c078da55d75
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 434ee08..283314b 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -769,6 +769,10 @@
# to revisions r0p0, r1p0 and r1p1 of the Cortex-X3 cpu, it is fixed in r1p2.
CPU_FLAG_LIST += ERRATA_X3_2742421
+# Flag to apply erratum 2779509 workaround on reset. This erratum applies
+# to revisions r0p0, r1p0, r1p1 of the Cortex-X3 cpu, it is fixed in r1p2.
+CPU_FLAG_LIST += ERRATA_X3_2779509
+
# Flag to apply erratum 1922240 workaround during reset. This erratum applies
# to revision r0p0 of the Cortex-A510 cpu and is fixed in r0p1.
CPU_FLAG_LIST += ERRATA_A510_1922240