From patchwork Tue Jul 12 10:55:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yajun Wu X-Patchwork-Id: 1655318 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256 header.s=selector2 header.b=OXVPjAC3; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4LhyWy2p5Qz9s07 for ; Tue, 12 Jul 2022 21:02:37 +1000 (AEST) Received: from localhost ([::1]:50262 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oBDex-0000U6-Kq for incoming@patchwork.ozlabs.org; Tue, 12 Jul 2022 07:02:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54246) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oBDd1-0000Tt-TZ for qemu-devel@nongnu.org; Tue, 12 Jul 2022 07:00:31 -0400 Received: from mail-bn7nam10on20604.outbound.protection.outlook.com ([2a01:111:f400:7e8a::604]:46841 helo=NAM10-BN7-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oBDcz-0005d1-HR for qemu-devel@nongnu.org; Tue, 12 Jul 2022 07:00:31 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=V5P/p1jMYJzNe57hxXcOVSD2JZM4NAp5NheXlSh7tR+ITt1rjR8z5QJWFuqWJ/kw1xU7baNyewDDyCyLkAo5KHbNvvzSBLbAmfgJsuouWSJAYYPobVnlUJByFclaOvRPR+bnDYeysPgj4NazkLuqAri7slpFkP8plGTaFp1nyYP83KrVYj3SVHfue0ZLeoio9+h7rR6D2D5AKUfn7tSkhnKMituj07nHwS9dhr2pNDmturK65USmfHRLhtgl7gTXa1+bSUeifF9hgLAarb15XJAqIRPoKAuSQn3KDItQ8JSSqr0TaCWTeDJVZHw1OvD1+UA08qvwWif7aBOwERZ2cA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=/DHqfeFmREQ6SBawGcShV9g1rwuY5ClcZ+mGZPy/ayQ=; b=L883ISEpGWuUG3OHRxXO/nPwiyELJ0D4yM+okFqXh9NdM6DPOmVXHgG2QkpvImw5TTQtR5YsWfDuAJleIzc2v+GHuslmsW73yI9N5i0DDDoURCs9t17L7gOYAGQjmE4ODiCvRxgetWu426F2XHbrh470EYT0PNgq7o1Y1CU+MLr77wHlixZqmHsQ6Hroi3bchYRBsHLRykDYR/+YlveWF8VGd6gGUp1i4WFjPrv7TV1Gay0JUmFIw3LuesP1mc07NllCe/ppeK6G1Yi84N60LMo09nR1cdk8v466EJPo+/q26W6v1cHi7sL5Bjd60m9xS4KEaM5Bzuq2eJ5Pp6ca0g== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 12.22.5.235) smtp.rcpttodomain=redhat.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=/DHqfeFmREQ6SBawGcShV9g1rwuY5ClcZ+mGZPy/ayQ=; b=OXVPjAC3AhvhZKTaykXBzL/bPAnSCrMtfEc5EhosGi49rdC4F8C2zGx8Azw71yHz26sNA5qZ3DrucsjgZYiVxs8Tn2zDNNy1/rv8gls/Z4JZkYpclEBaT8U1Ko3Ed92OAIk9p/agbnodWQHjNPN7F46NBictsOaSL5KjpUPUh/L1K+dTqOCw/D/cm1lAb5HQ7uR0sgnFKjHyFEMuepgHkqX066wOu0T0rwU9LBKcxVW3SCQuipGY4xR9G4Dk0FBHo4/+6xpAgOFEOcNM+xQKNehI2A97Wuctgdc5GNVKM0WKa8Zquqi84NhJVcgkF/LSJNWEyu0woLApP/3hgjIxBg== Received: from DS7PR06CA0040.namprd06.prod.outlook.com (2603:10b6:8:54::28) by DM6PR12MB3226.namprd12.prod.outlook.com (2603:10b6:5:186::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5417.16; Tue, 12 Jul 2022 10:55:24 +0000 Received: from DM6NAM11FT036.eop-nam11.prod.protection.outlook.com (2603:10b6:8:54:cafe::2b) by DS7PR06CA0040.outlook.office365.com (2603:10b6:8:54::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5417.20 via Frontend Transport; Tue, 12 Jul 2022 10:55:24 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 12.22.5.235) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 12.22.5.235 as permitted sender) receiver=protection.outlook.com; client-ip=12.22.5.235; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (12.22.5.235) by DM6NAM11FT036.mail.protection.outlook.com (10.13.172.64) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.5417.15 via Frontend Transport; Tue, 12 Jul 2022 10:55:24 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by DRHQMAIL107.nvidia.com (10.27.9.16) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Tue, 12 Jul 2022 10:55:23 +0000 Received: from nvidia.com (10.126.230.35) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.26; Tue, 12 Jul 2022 03:55:21 -0700 From: Yajun Wu To: , , , Subject: [PATCH v2 1/2] vhost: Change the sequence of device start Date: Tue, 12 Jul 2022 13:55:00 +0300 Message-ID: <20220712105501.688628-2-yajunw@nvidia.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220712105501.688628-1-yajunw@nvidia.com> References: <20220629022517.2600911-1-yajunw@nvidia.com> <20220712105501.688628-1-yajunw@nvidia.com> MIME-Version: 1.0 X-Originating-IP: [10.126.230.35] X-ClientProxiedBy: rnnvmail203.nvidia.com (10.129.68.9) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 717d8152-7a66-480b-92f2-08da63f50602 X-MS-TrafficTypeDiagnostic: DM6PR12MB3226:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:12.22.5.235; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:InfoNoRecords; CAT:NONE; SFS:(13230016)(4636009)(39860400002)(376002)(346002)(136003)(396003)(36840700001)(46966006)(40470700004)(336012)(36860700001)(47076005)(16526019)(82310400005)(6286002)(6666004)(26005)(36756003)(110136005)(2616005)(41300700001)(316002)(83380400001)(7696005)(40460700003)(1076003)(426003)(8936002)(81166007)(186003)(356005)(6636002)(82740400003)(40480700001)(55016003)(8676002)(70206006)(70586007)(86362001)(5660300002)(2906002)(478600001)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jul 2022 10:55:24.4065 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 717d8152-7a66-480b-92f2-08da63f50602 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[12.22.5.235]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT036.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB3226 Received-SPF: softfail client-ip=2a01:111:f400:7e8a::604; envelope-from=yajunw@nvidia.com; helo=NAM10-BN7-obe.outbound.protection.outlook.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This patch is part of adding vhost-user vhost_dev_start support. The motivation is to improve backend configuration speed and reduce live migration VM downtime. Moving the device start routines after finishing all the necessary device and VQ configuration, further aligning to the virtio specification for "device initialization sequence". Following patch will add vhost-user vhost_dev_start support. Signed-off-by: Yajun Wu Acked-by: Parav Pandit --- hw/block/vhost-user-blk.c | 18 +++++++++++------- hw/net/vhost_net.c | 12 ++++++------ 2 files changed, 17 insertions(+), 13 deletions(-) diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c index 9117222456..972ef46365 100644 --- a/hw/block/vhost-user-blk.c +++ b/hw/block/vhost-user-blk.c @@ -163,13 +163,6 @@ static int vhost_user_blk_start(VirtIODevice *vdev, Error **errp) goto err_guest_notifiers; } - ret = vhost_dev_start(&s->dev, vdev); - if (ret < 0) { - error_setg_errno(errp, -ret, "Error starting vhost"); - goto err_guest_notifiers; - } - s->started_vu = true; - /* guest_notifier_mask/pending not used yet, so just unmask * everything here. virtio-pci will do the right thing by * enabling/disabling irqfd. @@ -178,9 +171,20 @@ static int vhost_user_blk_start(VirtIODevice *vdev, Error **errp) vhost_virtqueue_mask(&s->dev, vdev, i, false); } + s->dev.vq_index_end = s->dev.nvqs; + ret = vhost_dev_start(&s->dev, vdev); + if (ret < 0) { + error_setg_errno(errp, -ret, "Error starting vhost"); + goto err_guest_notifiers; + } + s->started_vu = true; + return ret; err_guest_notifiers: + for (i = 0; i < s->dev.nvqs; i++) { + vhost_virtqueue_mask(&s->dev, vdev, i, true); + } k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false); err_host_notifiers: vhost_dev_disable_notifiers(&s->dev, vdev); diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index ccac5b7a64..6a8a6082a2 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -370,21 +370,21 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs, } else { peer = qemu_get_peer(ncs, n->max_queue_pairs); } - r = vhost_net_start_one(get_vhost_net(peer), dev); - - if (r < 0) { - goto err_start; - } if (peer->vring_enable) { /* restore vring enable state */ r = vhost_set_vring_enable(peer, peer->vring_enable); if (r < 0) { - vhost_net_stop_one(get_vhost_net(peer), dev); goto err_start; } } + + r = vhost_net_start_one(get_vhost_net(peer), dev); + if (r < 0) { + vhost_net_stop_one(get_vhost_net(peer), dev); + goto err_start; + } } return 0;