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=-9.8 required=3.0 tests=DATE_IN_FUTURE_06_12, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 2E5E7C0044D for ; Tue, 17 Mar 2020 02:43:53 +0000 (UTC) Received: from dpdk.org (dpdk.org [92.243.14.124]) by mail.kernel.org (Postfix) with ESMTP id E6A5C20575 for ; Tue, 17 Mar 2020 02:43:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E6A5C20575 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.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 225AB1C113; Tue, 17 Mar 2020 03:43:19 +0100 (CET) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id B10AA1C0C5 for ; Tue, 17 Mar 2020 03:43:14 +0100 (CET) IronPort-SDR: 0gDpikvGvOQKb5Fv3PexGy/dFcF1wDSZ3Spnft+wlEvwEWksVgDEDU+OFJewDs2b3RCrXddAs6 hWcgvEPvla0g== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Mar 2020 19:43:14 -0700 IronPort-SDR: y77amzvtGYdcXUGjL67EsaI2nUo7SPXbmFAnSB2Cia7lKufJKJxvc679swLwFccGWt5EYkl6tj FgymZj7ofIyw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,562,1574150400"; d="scan'208";a="417390214" Received: from npg_dpdk_virtio_jiayuhu_07.sh.intel.com ([10.67.119.35]) by orsmga005.jf.intel.com with ESMTP; 16 Mar 2020 19:43:12 -0700 From: Jiayu Hu To: dev@dpdk.org Cc: maxime.coquelin@redhat.com, xiaolong.ye@intel.com, zhihong.wang@intel.com, Jiayu Hu Date: Tue, 17 Mar 2020 05:21:25 -0400 Message-Id: <1584436885-18651-5-git-send-email-jiayu.hu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1584436885-18651-1-git-send-email-jiayu.hu@intel.com> References: <1584436885-18651-1-git-send-email-jiayu.hu@intel.com> Subject: [dpdk-dev] [PATCH 4/4] doc: add I/OAT acceleration support for vhost-user PMD 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" Signed-off-by: Jiayu Hu --- doc/guides/nics/vhost.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/doc/guides/nics/vhost.rst b/doc/guides/nics/vhost.rst index 912f4bd..f0d9520 100644 --- a/doc/guides/nics/vhost.rst +++ b/doc/guides/nics/vhost.rst @@ -25,6 +25,15 @@ Currently, the vhost PMD provides the basic functionality of packet reception, t * Don't need to stop RX/TX, when the user wants to stop a guest or a virtio-net driver on guest. +* It supports to offload large data movement in Tx operations from the + CPU to the I/OAT device for every queue. Note that I/OAT acceleration + is just enabled for split rings. In addition, a queue can only use one + I/OAT device, and I/OAT devices cannot be shared among vhost ports and + queues. That is, an I/OAT device can only be used by one queue at a + time. Moreover, users cannot enable I/OAT acceleration, if iommu or + postcopy live-migration is enabled; when enabling I/OAT acceleration + for a queue, Rx interrupt is not supported. + Vhost PMD arguments ------------------- @@ -54,6 +63,11 @@ The user can specify below arguments in `--vdev` option. It is used to enable tso support in vhost library. (Default: 0 (disabled)) +#. ``dmas``: + + It is used to specify DMA engines used to accelerate data movement + in Tx operations for queues. + Vhost PMD event handling ------------------------ -- 2.7.4