On Tue, Jul 7, 2020 at 1:44 AM Honnappa Nagarahalli <honnappa.nagaraha...@arm.com> wrote: > > Updated the use of DMB instruction in rte_*mb APIs for Armv8-a. > > Signed-off-by: Honnappa Nagarahalli <honnappa.nagaraha...@arm.com> > Acked-by: Jerin Jacob <jer...@marvell.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..567ae6b2a 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. > ========================================================= >
This release note update will be squashed with the change itself in patch 1. > +* **rte_*mb APIs are updated to use DMB instruction for Armv8-a.** We use "ARMv8" in the release notes, any objection if I update this when applying? > + > + 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 > -- David Marchand
