From patchwork Fri Jul 3 18:57:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Honnappa Nagarahalli X-Patchwork-Id: 231990 Delivered-To: patch@linaro.org Received: by 2002:a92:d244:0:0:0:0:0 with SMTP id v4csp2644210ilg; Fri, 3 Jul 2020 11:58:04 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzSxiIBJzEBI/CohVJXJN5aeFxdBvIPmtRlVQMl5qS43lged2LJpPYTIw3NqZfXW64CMnjH X-Received: by 2002:a5d:60c7:: with SMTP id x7mr35494709wrt.138.1593802684070; Fri, 03 Jul 2020 11:58:04 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1593802684; cv=none; d=google.com; s=arc-20160816; b=mAo7oKCx0g63XMnU1/bOaBWDLFrgdJP42HMDp5XspkbuMDU/ZEuryExQeztHWHiLwg 5FnzOi1/vI9xr45D2LR8VdK8Di/Rge3rJx+6SFkb9BG7MLSJIZzKr2mS7SEhA3opw456 FgGSqO1z7mcxdt60Dt7WeGJHspe6DpDijUpKlPoXHKz8NtGyIYsbXHw/iTrUGZpQsFFG XF3LoNDOdoFOTya7LWdFCIWADDZ/vb60ZHFfIGadL1MQMLKHsAN+LlPXPAW/o3Nmg54n 21EYMCoG3ffzZgJC0q4lWSbzni26gw8hpt196HYdMAZMHLNJwnXK9Ku0BuaiqzjK3Bs6 EuCA== 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=wYnH6cJSFW6olyk8h8aH9JsRqtrvWEAGVkPALGY1YFY=; b=IpLuM01AaOjhr3k8T58ex2BrC4ywCVlx4X+HKRAUioEfZmjAJfcXarFbE/urYnFrbq NyYY5azoh6EGPLb2bBxW4r2quULLQBet1OQXR1nqjRIhs64T07hCqVGzT0Dnh+OMOhvt yKydz34LvkCd/JhJYh/HqPTNQWdsAxyHh+NtD6uIKClJTBKIdAP9hwXHqox8/mXRM/xA BVpmmeB6460WrlzH9ahTXPhxkl+Kr0KvTRR4cCE0NiIP7incx+6UULlaFl1SrVdGdKs2 z9UmHPLejW19xQ/tlowNEUuiRZP27SYfexPHLmw9uIB14uOsEQnOvDAmjmNMmlX9u0I5 Sehw== 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 y5si11576178wrq.347.2020.07.03.11.58.03; Fri, 03 Jul 2020 11:58:04 -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 6E79F1DCE1; Fri, 3 Jul 2020 20:58:03 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id D46001DCE0 for ; Fri, 3 Jul 2020 20:58:01 +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 4BDD62F; Fri, 3 Jul 2020 11:58:01 -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 431DE3F68F; Fri, 3 Jul 2020 11:58:01 -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: Fri, 3 Jul 2020 13:57:40 -0500 Message-Id: <20200703185741.22184-2-honnappa.nagarahalli@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200703185741.22184-1-honnappa.nagarahalli@arm.com> References: <20200410164127.54229-1-gavin.hu@arm.com> <20200703185741.22184-1-honnappa.nagarahalli@arm.com> Subject: [dpdk-dev] [PATCH v3 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 --- doc/guides/rel_notes/release_20_08.rst | 7 +++++++ 1 file changed, 7 insertions(+) -- 2.17.1 Acked-by: Jerin Jacob 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: