From patchwork Mon May 7 23:09:54 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Samudrala, Sridhar" X-Patchwork-Id: 10384967 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3737D60318 for ; Mon, 7 May 2018 23:47:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1A799204C2 for ; Mon, 7 May 2018 23:47:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C6022625B; Mon, 7 May 2018 23:47:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8770A204C2 for ; Mon, 7 May 2018 23:47:53 +0000 (UTC) Received: from localhost ([::1]:48575 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fFprE-0007y0-Ji for patchwork-qemu-devel@patchwork.kernel.org; Mon, 07 May 2018 19:47:52 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34570) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fFpGc-0007NQ-BM for qemu-devel@nongnu.org; Mon, 07 May 2018 19:10:03 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fFpGZ-0003bz-0l for qemu-devel@nongnu.org; Mon, 07 May 2018 19:10:02 -0400 Received: from mga02.intel.com ([134.134.136.20]:55742) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fFpGY-0003ZG-MP for qemu-devel@nongnu.org; Mon, 07 May 2018 19:09:58 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 07 May 2018 16:09:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,376,1520924400"; d="scan'208";a="53226738" Received: from arch-p28.jf.intel.com ([10.166.187.31]) by fmsmga001.fm.intel.com with ESMTP; 07 May 2018 16:09:54 -0700 From: Sridhar Samudrala To: mst@redhat.com, netdev@vger.kernel.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org, jesse.brandeburg@intel.com, alexander.h.duyck@intel.com, kubakici@wp.pl, sridhar.samudrala@intel.com, jasowang@redhat.com, loseweigh@gmail.com, jiri@resnulli.us, aaron.f.brown@intel.com, qemu-devel@nongnu.org Date: Mon, 7 May 2018 16:09:54 -0700 Message-Id: <1525734594-11134-1-git-send-email-sridhar.samudrala@intel.com> X-Mailer: git-send-email 1.8.3.1 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.20 X-Mailman-Approved-At: Mon, 07 May 2018 19:46:42 -0400 Subject: [Qemu-devel] [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This feature bit can be used by hypervisor to indicate virtio_net device to act as a standby for another device with the same MAC address. I tested this with a small change to the patch to mark the STANDBY feature 'true' by default as i am using libvirt to start the VMs. Is there a way to pass the newly added feature bit 'standby' to qemu via libvirt XML file? Signed-off-by: Sridhar Samudrala --- hw/net/virtio-net.c | 2 ++ include/standard-headers/linux/virtio_net.h | 3 +++ 2 files changed, 5 insertions(+) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 90502fca7c..38b3140670 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -2198,6 +2198,8 @@ static Property virtio_net_properties[] = { true), DEFINE_PROP_INT32("speed", VirtIONet, net_conf.speed, SPEED_UNKNOWN), DEFINE_PROP_STRING("duplex", VirtIONet, net_conf.duplex_str), + DEFINE_PROP_BIT64("standby", VirtIONet, host_features, VIRTIO_NET_F_STANDBY, + false), DEFINE_PROP_END_OF_LIST(), }; diff --git a/include/standard-headers/linux/virtio_net.h b/include/standard-headers/linux/virtio_net.h index e9f255ea3f..01ec09684c 100644 --- a/include/standard-headers/linux/virtio_net.h +++ b/include/standard-headers/linux/virtio_net.h @@ -57,6 +57,9 @@ * Steering */ #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ +#define VIRTIO_NET_F_STANDBY 62 /* Act as standby for another device + * with the same MAC. + */ #define VIRTIO_NET_F_SPEED_DUPLEX 63 /* Device set linkspeed and duplex */ #ifndef VIRTIO_NET_NO_LEGACY