fix(cpus): workaround for Cortex-X3 erratum 2742421
Cortex-X3 erratum 2742421 is a Cat B erratum that applies to
all revisions <= r1p1 and is fixed in r1p2. The workaround is to
set CPUACTLR5_EL1[56:55] to 2'b01.
SDEN documentation:
https://developer.arm.com/documentation/2055130/latest
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
Change-Id: Idadd323e419739fe909b9b68ea2dbe857846666b
(cherry picked from commit 5b0e4438d0e604e80ffff17d02e37cae0f4b2a8f)
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index fae4380..6d2ed4b 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -747,6 +747,10 @@
# to revisions r0p0, r1p0, r1p1 of the Cortex-X3 cpu, it is still open.
CPU_FLAG_LIST += ERRATA_X3_2615812
+# Flag to apply erratum 2742421 workaround on reset. This erratum applies
+# 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 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