From patchwork Mon Jul 6 23:43:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Honnappa Nagarahalli X-Patchwork-Id: 234900 Delivered-To: patch@linaro.org Received: by 2002:a92:d244:0:0:0:0:0 with SMTP id v4csp411249ilg; Mon, 6 Jul 2020 16:43:58 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwqixioGtNwu02xNi8IJ3CxUd4Vc1XwUurMDSvsctP2I8OM9S51wE9k5v6FYfaAX27y2FmE X-Received: by 2002:a25:2604:: with SMTP id m4mr80549024ybm.470.1594079038333; Mon, 06 Jul 2020 16:43:58 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1594079038; cv=none; d=google.com; s=arc-20160816; b=CzouZnYomIXGrgHPl5w8CgRzpat01HJ9yH8dCgePgD6Xv24MVbhgofpeDRxV+zr/kb vkn3B5Fl2VcwTHOuwRinujWPxvFwgdO7Sq8M6mYEzJVIcB2tcyv2szOLOVRbIqs4kjTp M+fjP91Pk8HB/cBx7lDseptWRyW4OQLpePsn1TOQ1WsI/94zfnIr3xJmZ18BYljURBpl iDk6W36tk6C+hHtkF5yL6bioJseOn4M8ZnG04rVsqghe+dNrj6IqwOPnr9e89NxvS54k GxneZRsqc2rCnI+Tc6FqPoxDvS2fPvq7Hykti+6UYqg0HRFzc4zZk0TbIhjcqbO5J0u8 1Z+g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:subject:references:in-reply-to :message-id:date:cc:to:from; bh=LkHRzXzVLyUftXMR1hZfxdg9u9Z/3Kra/zhHCpovpV0=; b=M+eQ5XKFfc9AI8efHa+z4tYPYvUT+4sCZzHHGzXKJRsNlxOGKRgyXKzLJDxxTwlNEq y+rb/0Jz7nyqdKCDGJyauvWWd5tCIvTOwjYb2ZQ7FvcCUNGFj5bBMi+TwSFqvWcmo/Va F3LZtoU+A85aUUf3hk3VbPn1NOJnCfUODjFKdyxUhItCgxWZnS1bzeDjkOVqoPXX99+N 4dJUmrQhuAqayd5FzP8RSpsK+bDApvw5/SSWbF7k90Rb4fn6seGcWCNNKTU9BN4v3okN vydSIAxvEir3srDFhze2dGAzmX9GqbiThMYZ08ZoL3mqwsBf19NdnH5w78DmfuxTLDS7 j0NQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of dev-bounces@dpdk.org designates 92.243.14.124 as permitted sender) smtp.mailfrom=dev-bounces@dpdk.org Return-Path: Received: from dpdk.org (dpdk.org. [92.243.14.124]) by mx.google.com with ESMTP id h4si20579455ybm.156.2020.07.06.16.43.58; Mon, 06 Jul 2020 16:43:58 -0700 (PDT) Received-SPF: pass (google.com: domain of dev-bounces@dpdk.org designates 92.243.14.124 as permitted sender) client-ip=92.243.14.124; Authentication-Results: mx.google.com; spf=pass (google.com: domain of dev-bounces@dpdk.org designates 92.243.14.124 as permitted sender) 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(+) -- 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..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: