fix(errata): workaround for Cortex-X2 errata 2017096
Cortex-X2 erratum 2017096 is a Cat B erratum that applies to
revisions r0p0, r1p0 & r2p0. The workaround is to set CPUECLTR_EL1[8]
to 1 which disables store issue prefetching.
SDEN can be found here:
https://developer.arm.com/documentation/SDEN1775100
Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
Change-Id: I3b740aedc95c2394f6b8d1186014d2b2f640ae05
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index dd06cb8..2422a41 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2014-2021, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2014-2022, ARM Limited and Contributors. All rights reserved.
# Copyright (c) 2020-2021, NVIDIA Corporation. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
@@ -497,15 +497,20 @@
# Flag to apply erratum 2002765 workaround during reset. This erratum applies
# to revisions r0p0, r1p0, and r2p0 of the Cortex-X2 cpu and is still open.
-ERRATA_X2_2002765 ?=0
+ERRATA_X2_2002765 ?=0
# Flag to apply erratum 2058056 workaround during reset. This erratum applies
# to revisions r0p0, r1p0, and r2p0 of the Cortex-X2 cpu and is still open.
-ERRATA_X2_2058056 ?=0
+ERRATA_X2_2058056 ?=0
# Flag to apply erratum 2083908 workaround during reset. This erratum applies
# to revision r2p0 of the Cortex-X2 cpu and is still open.
-ERRATA_X2_2083908 ?=0
+ERRATA_X2_2083908 ?=0
+
+# Flag to apply erratum 2017096 workaround during reset. This erratum applies
+# only to revisions r0p0, r1p0 and r2p0 of the Cortex-X2 cpu, it is fixed in
+# r2p1.
+ERRATA_X2_2017096 ?=0
# Flag to apply DSU erratum 798953. This erratum applies to DSUs revision r0p0.
# Applying the workaround results in higher DSU power consumption on idle.
@@ -944,6 +949,10 @@
$(eval $(call assert_boolean,ERRATA_X2_2083908))
$(eval $(call add_define,ERRATA_X2_2083908))
+# Process ERRATA_X2_2017096 flag
+$(eval $(call assert_boolean,ERRATA_X2_2017096))
+$(eval $(call add_define,ERRATA_X2_2017096))
+
# Process ERRATA_DSU_798953 flag
$(eval $(call assert_boolean,ERRATA_DSU_798953))
$(eval $(call add_define,ERRATA_DSU_798953))