| Message ID | 20200703185741.22184-2-honnappa.nagarahalli@arm.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v3,1/3] eal: adjust barriers for IO on Armv8-a | expand |
On Sat, Jul 4, 2020 at 12:28 AM Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> wrote: > > Updated the use of DMB instruction in rte_*mb APIs for Armv8-a. > > Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli@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.** IMO, It is better to change to following as the end user can ignore parsing the description if not interested in arm64. rte_*mb APIs are updated to use DMB instruction for Armv8-a With above change: Acked-by: Jerin Jacob <jerinj@marvell.com> > + > + 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 >
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:
Updated the use of DMB instruction in rte_*mb APIs for Armv8-a. Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> --- doc/guides/rel_notes/release_20_08.rst | 7 +++++++ 1 file changed, 7 insertions(+) -- 2.17.1