fix(gic600): implement workaround to forward highest priority interrupt
If the interrupt being targeted is released from the CPU before the
CLEAR command is sent to the CPU then a subsequent SET command may not
be delivered in a finite time. To workaround this, issue an unblocking
event by toggling GICR_CTLR.DPG* bits after clearing the cpu group
enable (EnableGrp* bits of GIC CPU interface register)
This fix is implemented as per the errata 2384374-part 2 workaround
mentioned here:
https://developer.arm.com/documentation/sden892601/latest/
Change-Id: I13926ceeb7740fa4c05cc5b43170e7ce49598f70
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index fbd2cbc..4f98133 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -624,9 +624,17 @@
This is used to control how the LL_CACHE* PMU events count.
Default value is 0 (Disabled).
+GIC Errata Workarounds
+----------------------
+- ``GIC600_ERRATA_WA_2384374``: This flag applies part 2 of errata 2384374
+ workaround for the affected GIC600 and GIC600-AE implementations. It applies
+ to implementations of GIC600 and GIC600-AE with revisions less than or equal
+ to r1p6 and r0p2 respectively. If the platform sets GICV3_SUPPORT_GIC600,
+ then this flag is enabled; otherwise, it is 0 (Disabled).
+
--------------
-*Copyright (c) 2014-2021, Arm Limited and Contributors. All rights reserved.*
+*Copyright (c) 2014-2022, Arm Limited and Contributors. All rights reserved.*
.. _CVE-2017-5715: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715
.. _CVE-2018-3639: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3639