1 files changed, 14 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 2ad79b288b69..9277237810e9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1285,6 +1285,20 @@ config ARM_ERRATA_364296
           processor into full low interrupt latency mode. ARM11MPCore
           is not affected.
 
+config ARM_ERRATA_764369
+        bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
+        depends on CPU_V7 && SMP
+        help
+          This option enables the workaround for erratum 764369
+          affecting Cortex-A9 MPCore with two or more processors (all
+          current revisions). Under certain timing circumstances, a data
+          cache line maintenance operation by MVA targeting an Inner
+          Shareable memory region may fail to proceed up to either the
+          Point of Coherency or to the Point of Unification of the
+          system. This workaround adds a DSB instruction before the
+          relevant cache maintenance functions and sets a specific bit
+          in the diagnostic control register of the SCU.
+
 endmenu
 
 source "arch/arm/common/Kconfig"