Workaround for Neoverse N1 erratum 1868343
Neoverse N1 erratum 1868343 is a Cat B erratum, present in older
revisions of the Neoverse N1 processor core. The workaround is to
set a bit in the CPUACTLR_EL1 system register, which delays instruction
fetch after branch misprediction. This workaround will have a small
impact on performance.
SDEN can be found here:
https://documentation-service.arm.com/static/5f2c130260a93e65927bc92f
Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I37da2b3b2da697701b883bff9a1eff2772352844
diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index 33b5090..3c0e30f 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -294,6 +294,9 @@
- ``ERRATA_N1_1542419``: This applies errata 1542419 workaround to Neoverse-N1
CPU. This needs to be enabled only for revisions r3p0 - r4p0 of the CPU.
+- ``ERRATA_N1_1868343``: This applies errata 1868343 workaround to Neoverse-N1
+ CPU. This needs to be enabled only for revision <= r4p0 of the CPU.
+
DSU Errata Workarounds
----------------------