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/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index d03daf8..8743b04 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -759,6 +759,10 @@
Cortex-X3 CPU. This needs to be enabled only for revisions r0p0, r1p0 and
r1p1. It is fixed in r1p2.
+- ``ERRATA_X3_2779509``: This applies errata 2779509 workaround to Cortex-X3
+ CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1 of the
+ CPU. It is fixed in r1p2.
+
For Cortex-A510, the following errata build flags are defined :
- ``ERRATA_A510_1922240``: This applies errata 1922240 workaround to