commit 5819e23bc47c860872141caf42bddddb1b8679a5
author nayanpatel-arm <nayankumar.patel@arm.com> Wed Oct 06 15:31:24 2021 -0700
committer nayanpatel-arm <nayankumar.patel@arm.com> Thu Nov 04 12:13:22 2021 -0700
tree 31d3ab806fe8fd956cd95cfa37c34f4ec2e66811
parent 663461b9144e21b3fb0de92c886b63254964429a

fix(errata): workaround for Neoverse-N2 erratum 2242415

Neoverse-N2 erratum 2242415 is a Cat B erratum that applies to
revision r0p0 of CPU. It is still open. The workaround
is to set CPUACTLR_EL1[22] to 1'b1. Setting CPUACTLR_EL1[22]
will cause CFP instruction to invalidate all branch predictor
resources regardless of context.

SDEN can be found here:
https://developer.arm.com/documentation/SDEN1982442/latest

Signed-off-by: nayanpatel-arm <nayankumar.patel@arm.com>
Change-Id: I442be81fbc32e21fed51a84f59584df17f845e96

docs/design/cpu-specific-build-macros.rst

diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index eebeaa2..b19c534 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -340,11 +340,6 @@
    CPU. This needs to be enabled for revisions r3p0, r3p1, r4p0, and r4p1, for
    revisions r0p0, r1p0, and r2p0 there is no workaround.
 
-For Neoverse N2, the following errata build flags are defined :
-
--  ``ERRATA_N2_2002655``: This applies errata 2002655 workaround to Neoverse-N2
-   CPU. This needs to be enabled for revision r0p0 of the CPU, it is still open.
-
 For Neoverse V1, the following errata build flags are defined :
 
 -  ``ERRATA_V1_1774420``: This applies errata 1774420 workaround to Neoverse-V1
@@ -407,6 +402,9 @@
 
 For Neoverse N2, the following errata build flags are defined :
 
+-  ``ERRATA_N2_2002655``: This applies errata 2002655 workaround to Neoverse-N2
+   CPU. This needs to be enabled for revision r0p0 of the CPU, it is still open.
+
 -  ``ERRATA_N2_2067956``: This applies errata 2067956 workaround to Neoverse-N2
    CPU. This needs to be enabled for revision r0p0 of the CPU and is still open.
 
@@ -422,6 +420,9 @@
 -  ``ERRATA_N2_2138953``: This applies errata 2138953 workaround to Neoverse-N2
    CPU. This needs to be enabled for revision r0p0 of the CPU and is still open.
 
+-  ``ERRATA_N2_2242415``: This applies errata 2242415 workaround to Neoverse-N2
+   CPU. This needs to be enabled for revision r0p0 of the CPU and is still open.
+
 DSU Errata Workarounds
 ----------------------