[dpdk-dev] [PATCH v3 2/3] doc: update armv8-a IO barrier changes

[Honnappa Nagarahalli]

Updated the use of DMB instruction in rte_*mb APIs for Armv8-a.

Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli at arm.com>
---
 doc/guides/rel_notes/release_20_08.rst | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc/guides/rel_notes/release_20_08.rst b/doc/guides/rel_notes/release_20_08.rst
index 5cbc4ce14..15c21996d 100644
--- a/doc/guides/rel_notes/release_20_08.rst
+++ b/doc/guides/rel_notes/release_20_08.rst
@@ -56,6 +56,13 @@ New Features
      Also, make sure to start the actual text at the margin.
      =========================================================
 
+* **rte_*mb APIs are updated to use DMB instruction.**
+
+  Armv8-a memory model has been strengthened to require other-multi-copy
+  atomicity. This allows for using DMB instruction instead of DSB for IO
+  barriers. rte_*mb APIs, for Armv8-a platforms, are changed to use DMB
+  instruction to reflect this.
+
 * **Updated PCAP driver.**
 
   Updated PCAP driver with new features and improvements, including:
-- 
2.17.1