From patchwork Tue Oct 10 04:51:02 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yang, Zhiyong" X-Patchwork-Id: 30020 X-Patchwork-Delegate: yuanhan.liu@linux.intel.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C6E571B23C; Tue, 10 Oct 2017 06:51:21 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 044A81B235 for ; Tue, 10 Oct 2017 06:51:19 +0200 (CEST) Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Oct 2017 21:51:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,503,1500966000"; d="scan'208";a="136944782" Received: from unknown (HELO dpdk5.bj.intel.com) ([172.16.182.182]) by orsmga004.jf.intel.com with ESMTP; 09 Oct 2017 21:51:17 -0700 From: Zhiyong Yang To: dev@dpdk.org Cc: yliu@fridaylinux.org, john.mcnamara@intel.com, ferruh.yigit@intel.com, Zhiyong Yang Date: Tue, 10 Oct 2017 12:51:02 +0800 Message-Id: <20171010045102.11899-1-zhiyong.yang@intel.com> X-Mailer: git-send-email 2.13.3 In-Reply-To: <20171009035616.24482-1-zhiyong.yang@intel.com> References: <20171009035616.24482-1-zhiyong.yang@intel.com> Subject: [dpdk-dev] [PATCH v2] doc: add virtio lsc note 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" Virtio PMD has already supported link status change(lsc), but VM which must be created by qemu 2.7.0 and above can support it when vhost user disconnects, since the capability to detect vhost user disconnection is introduced in qemu 2.7.0. The patch updates doc to let user know that. Signed-off-by: Zhiyong Yang Reviewed-by: John McNamara --- Changes in v2: reword the doc and commit log. doc/guides/nics/virtio.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/doc/guides/nics/virtio.rst b/doc/guides/nics/virtio.rst index 4d6a83768..abf42dff5 100644 --- a/doc/guides/nics/virtio.rst +++ b/doc/guides/nics/virtio.rst @@ -291,6 +291,11 @@ interrupt, Rx interrupts, and Tx interrupts. Config interrupt is used for notification of device configuration changes, especially link status (lsc). Interrupt mode is translated into Rx interrupts in the context of DPDK. +.. Note:: Virtio PMD has already supported to receive lsc from qemu when link +status changes, especially when vhost user disconnects, but it fails to do that if VM +is created by qemu 2.6.2 or below, since the capability to detect vhost user +disconnection is introduced in qemu 2.7.0. + Prerequisites for Rx interrupts ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~