From patchwork Mon Jul 31 10:25:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Avihai Horon X-Patchwork-Id: 1814927 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.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=) Authentication-Results: legolas.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=th0FT/lB; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RDvbP3fc9z20G9 for ; Mon, 31 Jul 2023 20:28:33 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qQQ6t-0000gl-3z; Mon, 31 Jul 2023 06:26:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qQQ6M-0000cq-IR for qemu-devel@nongnu.org; Mon, 31 Jul 2023 06:26:12 -0400 Received: from mail-dm6nam10on2060a.outbound.protection.outlook.com ([2a01:111:f400:7e88::60a] helo=NAM10-DM6-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 1qQQ6K-0006wp-L4 for qemu-devel@nongnu.org; Mon, 31 Jul 2023 06:26:10 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=NY9MwYxhW06Oqz2lKQxPmlg79Pjsrpw8fpinFQf+tmkpTAEzGaL+ak7asGx18WaijQCCWwwZvWH7q7Lb+Ognb/amzSF/jfjvfKIV5Jou8CihhmIQ7Lms5BlBTXbO+T78RtysKbxSP8h/23ZS6bsYGRPfEF3hq1X+0zzo5gwW09L1fH9uf6LpXThEmKgOrEO6svffp75+IQu5JJ4dYk3QzMXwEYtsfYpSJjwOWp1RQfS9VQ8OiyKJcFatfmCaPVuSfvThV9JVNV1xUbLFxnGT7P6+9CatxFjsfZopHAyuV3wxKxHx0RxflKS0+fQn+Qv6VcY38ulA+bHTXbxw7mz68A== 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=+2Cpf03ijBTQMum1kFbRQc13/tGU/Zo1ftvlQgxELvw=; b=WXEkeqxmwGTxDX6GfAIVad1oA0XKZCJXrLdy9h41v7wnTdR/9mDw0bjx5JBTcSPtc8klEPGlocFB3jT17hy1Ze1fLsbezujr5c984yBvbemvonCuXkC65umY5Yw8X4Kt55Cg42Ac7bL61fMeHEqoYuyq3Dg4Y00VBED63KPy1uxe1qIWp3w0z55bc+EsvySZ9ioeLv3kONvnxpUYy0OGsAonpRK2sFjjlI3aJHMe2SaX/R8cK8Atlgv+sL3AuGaJ3++D1A5WqVjYA1X6IY810ZpQ/4uYvvfXuJJK/XEptGKD1++bDnHVYDHclSvNy+2T8LqbHXKVjHD0hRFVUQ82tQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.161) smtp.rcpttodomain=nongnu.org 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=+2Cpf03ijBTQMum1kFbRQc13/tGU/Zo1ftvlQgxELvw=; b=th0FT/lBHgYGW0qtUaxQ0k80+8+FAHlMYxpkjFAxzjZ/On0RomG6Sd3CxV/HLObunOBjbYT33TBokoVvv2afbEEM3ipt2fKoROHnkWWVoqWZ3hGqcYkZIQNJufOxUWkcxtEB5ckptNuwQx0v1o8gVTCebGvjhm32GyKUvceBxOLYz3N8dnbRNcPc8AdtAvJIWcIUhMx0cOHJeibeFEJlg2mtZ6JfDRDPIL0aDLp22nXBmsqseiVof5bVbxCHTG/foJsUSdQDW2BikgAJZkAU6auWbgHN2zYVB+X0SoQiuc7oXE/KPCy4nEB44GKIh6ndbyqQGSfbXIByrp7eL21YQQ== Received: from MW4PR02CA0005.namprd02.prod.outlook.com (2603:10b6:303:16d::14) by MW3PR12MB4396.namprd12.prod.outlook.com (2603:10b6:303:59::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6631.42; Mon, 31 Jul 2023 10:26:04 +0000 Received: from CO1NAM11FT023.eop-nam11.prod.protection.outlook.com (2603:10b6:303:16d:cafe::a2) by MW4PR02CA0005.outlook.office365.com (2603:10b6:303:16d::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6631.44 via Frontend Transport; Mon, 31 Jul 2023 10:26:04 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.117.161) 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 216.228.117.161 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.161; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.161) by CO1NAM11FT023.mail.protection.outlook.com (10.13.175.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6631.44 via Frontend Transport; Mon, 31 Jul 2023 10:26:04 +0000 Received: from rnnvmail202.nvidia.com (10.129.68.7) by mail.nvidia.com (10.129.200.67) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.5; Mon, 31 Jul 2023 03:25:46 -0700 Received: from rnnvmail204.nvidia.com (10.129.68.6) by rnnvmail202.nvidia.com (10.129.68.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.37; Mon, 31 Jul 2023 03:25:46 -0700 Received: from vdi.nvidia.com (10.127.8.9) by mail.nvidia.com (10.129.68.6) with Microsoft SMTP Server id 15.2.986.37 via Frontend Transport; Mon, 31 Jul 2023 03:25:43 -0700 From: Avihai Horon To: CC: Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_G?= =?utf-8?q?oater?= , Paolo Bonzini , Joao Martins , Yishai Hadas , Jason Gunthorpe , Maor Gottlieb , Kirti Wankhede , Tarun Gupta , Avihai Horon Subject: [PATCH for-8.2 v2 6/6] vfio/migration: Allow migration of multiple P2P supporting devices Date: Mon, 31 Jul 2023 13:25:21 +0300 Message-ID: <20230731102521.15335-7-avihaih@nvidia.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20230731102521.15335-1-avihaih@nvidia.com> References: <20230731102521.15335-1-avihaih@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT023:EE_|MW3PR12MB4396:EE_ X-MS-Office365-Filtering-Correlation-Id: 121ec098-408e-4a70-9437-08db91b08b7a 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:216.228.117.161; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge2.nvidia.com; CAT:NONE; SFS:(13230028)(4636009)(376002)(39860400002)(136003)(396003)(346002)(82310400008)(451199021)(40470700004)(46966006)(36840700001)(82740400003)(356005)(7636003)(40480700001)(86362001)(36756003)(40460700003)(6666004)(478600001)(7696005)(2616005)(107886003)(186003)(336012)(26005)(1076003)(8936002)(8676002)(5660300002)(70586007)(70206006)(54906003)(2906002)(41300700001)(6916009)(4326008)(316002)(36860700001)(83380400001)(426003)(47076005); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Jul 2023 10:26:04.1832 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 121ec098-408e-4a70-9437-08db91b08b7a X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.161]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT023.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR12MB4396 Received-SPF: softfail client-ip=2a01:111:f400:7e88::60a; envelope-from=avihaih@nvidia.com; helo=NAM10-DM6-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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-bounces+incoming=patchwork.ozlabs.org@nongnu.org Now that P2P support has been added to VFIO migration, allow migration of multiple devices if all of them support P2P migration. Single device migration is allowed regardless of P2P migration support. Signed-off-by: Avihai Horon Signed-off-by: Joao Martins Reviewed-by: Cédric Le Goater --- hw/vfio/common.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 7c3d636025..8a8d074e18 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -363,21 +363,31 @@ bool vfio_mig_active(void) static Error *multiple_devices_migration_blocker; -static unsigned int vfio_migratable_device_num(void) +/* + * Multiple devices migration is allowed only if all devices support P2P + * migration. Single device migration is allowed regardless of P2P migration + * support. + */ +static bool vfio_multiple_devices_migration_is_supported(void) { VFIOGroup *group; VFIODevice *vbasedev; unsigned int device_num = 0; + bool all_support_p2p = true; QLIST_FOREACH(group, &vfio_group_list, next) { QLIST_FOREACH(vbasedev, &group->device_list, next) { if (vbasedev->migration) { device_num++; + + if (!(vbasedev->migration->mig_flags & VFIO_MIGRATION_P2P)) { + all_support_p2p = false; + } } } } - return device_num; + return all_support_p2p || device_num <= 1; } int vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp) @@ -385,19 +395,19 @@ int vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp) int ret; if (multiple_devices_migration_blocker || - vfio_migratable_device_num() <= 1) { + vfio_multiple_devices_migration_is_supported()) { return 0; } if (vbasedev->enable_migration == ON_OFF_AUTO_ON) { - error_setg(errp, "Migration is currently not supported with multiple " - "VFIO devices"); + error_setg(errp, "Multiple VFIO devices migration is supported only if " + "all of them support P2P migration"); return -EINVAL; } error_setg(&multiple_devices_migration_blocker, - "Migration is currently not supported with multiple " - "VFIO devices"); + "Multiple VFIO devices migration is supported only if all of " + "them support P2P migration"); ret = migrate_add_blocker(multiple_devices_migration_blocker, errp); if (ret < 0) { error_free(multiple_devices_migration_blocker); @@ -410,7 +420,7 @@ int vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp) void vfio_unblock_multiple_devices_migration(void) { if (!multiple_devices_migration_blocker || - vfio_migratable_device_num() > 1) { + !vfio_multiple_devices_migration_is_supported()) { return; }