From patchwork Fri Aug 12 10:44:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhu, Lingshan" X-Patchwork-Id: 12942180 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 55FCFC25B08 for ; Fri, 12 Aug 2022 10:53:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237720AbiHLKxU (ORCPT ); Fri, 12 Aug 2022 06:53:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229664AbiHLKxL (ORCPT ); Fri, 12 Aug 2022 06:53:11 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BF9C1AA3D0; Fri, 12 Aug 2022 03:53:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1660301589; x=1691837589; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=rSMCc44orWz40q/OndXw8nR2dvRvYqPS8BXZeFBykGM=; b=WDLgptuagJXbH0dj82ptzl6gcjJVX7+YlvmgXte0BXos/Cl250MaSQHb 83tpOTu7NoJB4Ez5beEEKE2bElkgkiRlasE1SzzuFKL74RYq9JjZvl5vE r6pRKSOH3y4nPDWfJArOtPntmTSnrLueLF36IKXt43rh1q7y1BtSn/MIT XuiJpSBu1Qdcsr/iaMCbbXz0FcvJC9YpHDGfCvosRPXgVBLgudeePmvFP 7RZ2Faj/JVRCJDyklU7ciP/0nh6ue68QsFvjC9ZjMz6R73RjTBdUqS8fQ bhcEuXI2u4BafjbfZhCrEW08InLL52d90bo/t7L47C7hdcCv9fyLwY0u0 Q==; X-IronPort-AV: E=McAfee;i="6400,9594,10436"; a="271956291" X-IronPort-AV: E=Sophos;i="5.93,231,1654585200"; d="scan'208";a="271956291" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Aug 2022 03:53:09 -0700 X-IronPort-AV: E=Sophos;i="5.93,231,1654585200"; d="scan'208";a="665780603" Received: from unknown (HELO localhost.localdomain.bj.intel.com) ([10.240.193.73]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Aug 2022 03:53:07 -0700 From: Zhu Lingshan To: jasowang@redhat.com, mst@redhat.com Cc: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, parav@nvidia.com, xieyongji@bytedance.com, gautam.dawar@amd.com, Zhu Lingshan Subject: [PATCH V5 3/6] vDPA: allow userspace to query features of a vDPA device Date: Fri, 12 Aug 2022 18:44:57 +0800 Message-Id: <20220812104500.163625-4-lingshan.zhu@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220812104500.163625-1-lingshan.zhu@intel.com> References: <20220812104500.163625-1-lingshan.zhu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This commit adds a new vDPA netlink attribution VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES. Userspace can query features of vDPA devices through this new attr. Signed-off-by: Zhu Lingshan --- drivers/vdpa/vdpa.c | 17 +++++++++++++---- include/uapi/linux/vdpa.h | 3 +++ 2 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index ebf2f363fbe7..6eb3d972d802 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -491,6 +491,8 @@ static int vdpa_mgmtdev_fill(const struct vdpa_mgmt_dev *mdev, struct sk_buff *m err = -EMSGSIZE; goto msg_err; } + + /* report features of a vDPA management device through VDPA_ATTR_DEV_SUPPORTED_FEATURES */ if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_SUPPORTED_FEATURES, mdev->supported_features, VDPA_ATTR_PAD)) { err = -EMSGSIZE; @@ -815,7 +817,7 @@ static int vdpa_dev_net_mq_config_fill(struct vdpa_device *vdev, static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *msg) { struct virtio_net_config config = {}; - u64 features; + u64 features_device, features_driver; u16 val_u16; vdpa_get_config_unlocked(vdev, 0, &config, sizeof(config)); @@ -832,12 +834,19 @@ static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *ms if (nla_put_u16(msg, VDPA_ATTR_DEV_NET_CFG_MTU, val_u16)) return -EMSGSIZE; - features = vdev->config->get_driver_features(vdev); - if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_NEGOTIATED_FEATURES, features, + features_driver = vdev->config->get_driver_features(vdev); + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_NEGOTIATED_FEATURES, features_driver, + VDPA_ATTR_PAD)) + return -EMSGSIZE; + + features_device = vdev->config->get_device_features(vdev); + + /* report features of a vDPA device through VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES */ + if (nla_put_u64_64bit(msg, VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES, features_device, VDPA_ATTR_PAD)) return -EMSGSIZE; - return vdpa_dev_net_mq_config_fill(vdev, msg, features, &config); + return vdpa_dev_net_mq_config_fill(vdev, msg, features_driver, &config); } static int diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h index 25c55cab3d7c..d171b92ef522 100644 --- a/include/uapi/linux/vdpa.h +++ b/include/uapi/linux/vdpa.h @@ -46,7 +46,10 @@ enum vdpa_attr { VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */ VDPA_ATTR_DEV_MGMTDEV_MAX_VQS, /* u32 */ + /* features of a vDPA management device */ VDPA_ATTR_DEV_SUPPORTED_FEATURES, /* u64 */ + /* features of a vDPA device, e.g., /dev/vhost-vdpa0 */ + VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES, /* u64 */ VDPA_ATTR_DEV_QUEUE_INDEX, /* u32 */ VDPA_ATTR_DEV_VENDOR_ATTR_NAME, /* string */