From patchwork Wed Oct 18 17:14:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Dragos Tatulea X-Patchwork-Id: 13427525 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7477DCDB482 for ; Wed, 18 Oct 2023 17:16:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231639AbjJRRQb (ORCPT ); Wed, 18 Oct 2023 13:16:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232226AbjJRRQN (ORCPT ); Wed, 18 Oct 2023 13:16:13 -0400 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2080.outbound.protection.outlook.com [40.107.223.80]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB52C18D; Wed, 18 Oct 2023 10:16:04 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=iEj/bxhAwEkg7fQMmRVPgdsoECTbq4OB1JRCRG3nCVeHuTvvjA5eJ4K3woABvaQw/l265MLrxnwDDDyJfu2HM+JKbWQ+z44GDPAKq5epWJG/9dpj+qSSz6dF8hXx7KriTSoGdKtUsVtAbmhRrhYesFDH6fDGoVhCw4WIQd3rjBrzBpxpeKZpwL55+ZSIlrauqqSAJCHm9A6EvHEQRaCVuB04U/MBueeirjDdhSZ/wx/nWYnEaDgpR5WlkS7KejP/Ybib/1+UYGwdTx+uGfOn3vS3YI7/G2GVp7+rLopvOOh6HjGeh7Nnbq8iDILmtRRl2FxoZV96sAr3FhU2cd/Dew== 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=u64U1vHaUjCMSpg15sklK0flAB7mos1z6H94Kmb4gsM=; b=ObpmFBFUcASwundJf17ouX5HXIq1+hD4eWBaFW1esQ68A9va2SltWqoJ3NfBeaCXIvOWLLMw4QKqxVh4dcpo8RdKgvrngAcRvZ8JTubWlhrli5LLZF6LNI8vFDc70NC1+iB4B325QOOrOET379xvdOnOddXYPyktm1QuHAJ0Ct+yK4buqJ1R4RtZq1eV01y+iFANdsgzTDla6WTeA+KNZdIypKmfGEILE+KvOkNWoM0fgTeHjmEpz1fFyTcQL/qOTwyjnRTpnLaMJ4ULGEWm1CkMDhy936J1e+/K4XzSNRd/oQCEjIf4IiuDDp2SKO92rsw2eKCynmFA12mHJPD06w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.161) 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=u64U1vHaUjCMSpg15sklK0flAB7mos1z6H94Kmb4gsM=; b=Y6hg2/N54tfKr/Rb30K/PwbSMwKrF1WkPOLVRLcbggk6T+khh/rsG7qE5bnVmI3AUmHY3hX3c118BZ4fwrbi4cVqPZgLrEqe131tbeO1AzSUtT1J0UKZNMM56ojI5rJtb+rrkNrQXxWOFhJamUny+55O3baP/DJy8n471G52U5Ldf6AzwYhBsEDALmLrh07p6pVXrOjIND02YfktKPTZCc8bFX0lAwX8ohjY4JwThWLPgOaELbofTfPJ+PrgvQ7We7S63oCn8QHe80tV6l28DbMooFgiiXmpltyhDuVqsRMvpNpb7pCzFCOGgOq0AgIMLCaVBmabsOq1vo+F7B9vCg== Received: from BN0PR02CA0028.namprd02.prod.outlook.com (2603:10b6:408:e4::33) by DM4PR12MB5373.namprd12.prod.outlook.com (2603:10b6:5:39d::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6907.23; Wed, 18 Oct 2023 17:16:01 +0000 Received: from CY4PEPF0000FCC0.namprd03.prod.outlook.com (2603:10b6:408:e4:cafe::cd) by BN0PR02CA0028.outlook.office365.com (2603:10b6:408:e4::33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6886.36 via Frontend Transport; Wed, 18 Oct 2023 17:16:01 +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 CY4PEPF0000FCC0.mail.protection.outlook.com (10.167.242.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6907.23 via Frontend Transport; Wed, 18 Oct 2023 17:16:01 +0000 Received: from rnnvmail204.nvidia.com (10.129.68.6) 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 15.2.986.41; Wed, 18 Oct 2023 10:15:41 -0700 Received: from rnnvmail201.nvidia.com (10.129.68.8) by rnnvmail204.nvidia.com (10.129.68.6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.41; Wed, 18 Oct 2023 10:15:41 -0700 Received: from c-237-113-220-225.mtl.labs.mlnx (10.127.8.12) by mail.nvidia.com (10.129.68.8) with Microsoft SMTP Server id 15.2.986.41 via Frontend Transport; Wed, 18 Oct 2023 10:15:38 -0700 From: Dragos Tatulea To: "Michael S . Tsirkin" , Jason Wang , Eugenio Perez Martin , Si-Wei Liu , Saeed Mahameed , Leon Romanovsky , CC: Dragos Tatulea , , , Parav Pandit , Xuan Zhuo Subject: [PATCH vhost v4 04/16] vhost-vdpa: uAPI to get dedicated descriptor group id Date: Wed, 18 Oct 2023 20:14:43 +0300 Message-ID: <20231018171456.1624030-6-dtatulea@nvidia.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231018171456.1624030-2-dtatulea@nvidia.com> References: <20231018171456.1624030-2-dtatulea@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000FCC0:EE_|DM4PR12MB5373:EE_ X-MS-Office365-Filtering-Correlation-Id: 87625a0a-753f-4aee-b47c-08dbcffde708 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:(13230031)(4636009)(396003)(376002)(39860400002)(346002)(136003)(230922051799003)(82310400011)(186009)(64100799003)(1800799009)(451199024)(36840700001)(46966006)(40470700004)(40460700003)(7636003)(356005)(26005)(2616005)(83380400001)(1076003)(41300700001)(36860700001)(336012)(47076005)(426003)(82740400003)(478600001)(6666004)(54906003)(40480700001)(70586007)(110136005)(70206006)(316002)(2906002)(36756003)(86362001)(8936002)(8676002)(5660300002)(4326008);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Oct 2023 17:16:01.1433 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 87625a0a-753f-4aee-b47c-08dbcffde708 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: CY4PEPF0000FCC0.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5373 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Si-Wei Liu With _F_DESC_ASID backend feature, the device can now support the VHOST_VDPA_GET_VRING_DESC_GROUP ioctl, and it may expose the descriptor table (including avail and used ring) in a different group than the buffers it contains. This new uAPI will fetch the group ID of the descriptor table. Signed-off-by: Si-Wei Liu Acked-by: Eugenio Pérez Acked-by: Jason Wang --- drivers/vhost/vdpa.c | 10 ++++++++++ include/uapi/linux/vhost.h | 8 ++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 2f21798a37ee..851535f57b95 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -613,6 +613,16 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, else if (copy_to_user(argp, &s, sizeof(s))) return -EFAULT; return 0; + case VHOST_VDPA_GET_VRING_DESC_GROUP: + if (!vhost_vdpa_has_desc_group(v)) + return -EOPNOTSUPP; + s.index = idx; + s.num = ops->get_vq_desc_group(vdpa, idx); + if (s.num >= vdpa->ngroups) + return -EIO; + else if (copy_to_user(argp, &s, sizeof(s))) + return -EFAULT; + return 0; case VHOST_VDPA_SET_GROUP_ASID: if (copy_from_user(&s, argp, sizeof(s))) return -EFAULT; diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h index f5c48b61ab62..649560c685f1 100644 --- a/include/uapi/linux/vhost.h +++ b/include/uapi/linux/vhost.h @@ -219,4 +219,12 @@ */ #define VHOST_VDPA_RESUME _IO(VHOST_VIRTIO, 0x7E) +/* Get the group for the descriptor table including driver & device areas + * of a virtqueue: read index, write group in num. + * The virtqueue index is stored in the index field of vhost_vring_state. + * The group ID of the descriptor table for this specific virtqueue + * is returned via num field of vhost_vring_state. + */ +#define VHOST_VDPA_GET_VRING_DESC_GROUP _IOWR(VHOST_VIRTIO, 0x7F, \ + struct vhost_vring_state) #endif