From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14013C433E0 for ; Mon, 6 Jul 2020 23:43:58 +0000 (UTC) Received: from dpdk.org (dpdk.org [92.243.14.124]) by mail.kernel.org (Postfix) with ESMTP id BCD4E206E9 for ; Mon, 6 Jul 2020 23:43:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BCD4E206E9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dev-bounces@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 962961DC8B; Tue, 7 Jul 2020 01:43:55 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id 9D0E91DC8A for ; Tue, 7 Jul 2020 01:43:54 +0200 (CEST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2D93AC0A; Mon, 6 Jul 2020 16:43:54 -0700 (PDT) Received: from qc2400f-1.austin.arm.com (qc2400f-1.austin.arm.com [10.118.12.27]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2518A3F718; Mon, 6 Jul 2020 16:43:54 -0700 (PDT) From: Honnappa Nagarahalli To: dev@dpdk.org, honnappa.nagarahalli@arm.com, ruifeng.wang@arm.com, jerinj@marvell.com, hemant.agrawal@nxp.com, ajit.khaparde@broadcom.com, igorch@amazon.com, thomas@monjalon.net, viacheslavo@mellanox.com, arybchenko@solarflare.com, bruce.richardson@intel.com Cc: nd@arm.com Date: Mon, 6 Jul 2020 18:43:32 -0500 Message-Id: <20200706234333.26310-2-honnappa.nagarahalli@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200706234333.26310-1-honnappa.nagarahalli@arm.com> References: <20200410164127.54229-1-gavin.hu@arm.com> <20200706234333.26310-1-honnappa.nagarahalli@arm.com> Subject: [dpdk-dev] [PATCH v4 2/3] doc: update armv8-a IO barrier changes X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Updated the use of DMB instruction in rte_*mb APIs for Armv8-a. Signed-off-by: Honnappa Nagarahalli Acked-by: Jerin Jacob --- 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. ========================================================= +* **rte_*mb APIs are updated to use DMB instruction for Armv8-a.** + + 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