From mboxrd@z Thu Jan 1 00:00:00 1970 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 2696CC433EF for ; Thu, 19 May 2022 19:35:25 +0000 (UTC) Received: from localhost ([::1]:38986 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nrlvg-0006Mm-8F for qemu-devel@archiver.kernel.org; Thu, 19 May 2022 15:35:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48330) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nrlbE-0005mD-Ah for qemu-devel@nongnu.org; Thu, 19 May 2022 15:14:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:39609) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nrlbC-0006Sf-0B for qemu-devel@nongnu.org; Thu, 19 May 2022 15:14:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1652987653; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jHl10Grav3jvcUIoLdASsUU4Pdelp1R4NU9Pmy7E2yc=; b=Kdy2aUyI9k8c4ZFXPVYP7jm0SqtKTsGyFhs8njirW5ZkUGWzvjVuulzFiJSozTqjE7QTLY Sd0YyWj6pvKySyMKYM06csUV41KLRyRTewNyz/AMThUtgxgc4rs0MXI8xRUbGlIjvVLzjg wEUP6aS7RVvtMZEzzK94EqTlLAHvYu8= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-536-sYJ01E54OiiFRMKW6Fd3jw-1; Thu, 19 May 2022 15:14:12 -0400 X-MC-Unique: sYJ01E54OiiFRMKW6Fd3jw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 8F9353C138B9; Thu, 19 May 2022 19:14:11 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.193.126]) by smtp.corp.redhat.com (Postfix) with ESMTP id 046A22026D6A; Thu, 19 May 2022 19:14:08 +0000 (UTC) From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Gautam Dawar , "Michael S. Tsirkin" , Markus Armbruster , "Gonglei (Arei)" , Harpreet Singh Anand , Cornelia Huck , Zhu Lingshan , Laurent Vivier , Eli Cohen , Paolo Bonzini , Liuxiangdong , Eric Blake , Cindy Lu , Jason Wang , Parav Pandit Subject: [RFC PATCH v8 21/21] vdpa: Add x-cvq-svq Date: Thu, 19 May 2022 21:13:06 +0200 Message-Id: <20220519191306.821774-22-eperezma@redhat.com> In-Reply-To: <20220519191306.821774-1-eperezma@redhat.com> References: <20220519191306.821774-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Received-SPF: pass client-ip=170.10.133.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 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, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This isolates shadow cvq in its own group. Signed-off-by: Eugenio Pérez --- qapi/net.json | 8 ++- net/vhost-vdpa.c | 134 ++++++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 133 insertions(+), 9 deletions(-) diff --git a/qapi/net.json b/qapi/net.json index cd7a1b32fe..f5b047ae15 100644 --- a/qapi/net.json +++ b/qapi/net.json @@ -447,9 +447,12 @@ # # @x-svq: Start device with (experimental) shadow virtqueue. (Since 7.1) # (default: false) +# @x-cvq-svq: Start device with (experimental) shadow virtqueue in its own +# virtqueue group. (Since 7.1) +# (default: false) # # Features: -# @unstable: Member @x-svq is experimental. +# @unstable: Members @x-svq and x-cvq-svq are experimental. # # Since: 5.1 ## @@ -457,7 +460,8 @@ 'data': { '*vhostdev': 'str', '*queues': 'int', - '*x-svq': {'type': 'bool', 'features' : [ 'unstable'] } } } + '*x-svq': {'type': 'bool', 'features' : [ 'unstable'] }, + '*x-cvq-svq': {'type': 'bool', 'features' : [ 'unstable'] } } } ## # @NetdevVmnetHostOptions: diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index ef8c82f92e..ad006a2bf3 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -70,6 +70,30 @@ const int vdpa_feature_bits[] = { VHOST_INVALID_FEATURE_BIT }; +/** Supported device specific feature bits with SVQ */ +static const uint64_t vdpa_svq_device_features = + BIT_ULL(VIRTIO_NET_F_CSUM) | + BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | + BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | + BIT_ULL(VIRTIO_NET_F_MTU) | + BIT_ULL(VIRTIO_NET_F_MAC) | + BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | + BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | + BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | + BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | + BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | + BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | + BIT_ULL(VIRTIO_NET_F_HOST_ECN) | + BIT_ULL(VIRTIO_NET_F_HOST_UFO) | + BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | + BIT_ULL(VIRTIO_NET_F_STATUS) | + BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | + BIT_ULL(VIRTIO_NET_F_MQ) | + BIT_ULL(VIRTIO_F_ANY_LAYOUT) | + BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | + BIT_ULL(VIRTIO_NET_F_RSC_EXT) | + BIT_ULL(VIRTIO_NET_F_STANDBY); + VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) { VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); @@ -352,6 +376,17 @@ static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) return ret; } +static int vhost_vdpa_get_backend_features(int fd, uint64_t *features, + Error **errp) +{ + int ret = ioctl(fd, VHOST_GET_BACKEND_FEATURES, features); + if (ret) { + error_setg_errno(errp, errno, + "Fail to query backend features from vhost-vDPA device"); + } + return ret; +} + static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, int *has_cvq, Error **errp) { @@ -385,16 +420,56 @@ static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, return 1; } +/** + * Check vdpa device to support CVQ group asid 1 + * + * @vdpa_device_fd: Vdpa device fd + * @queue_pairs: Queue pairs + * @errp: Error + */ +static int vhost_vdpa_check_cvq_svq(int vdpa_device_fd, int queue_pairs, + Error **errp) +{ + uint64_t backend_features; + unsigned num_as; + int r; + + r = vhost_vdpa_get_backend_features(vdpa_device_fd, &backend_features, + errp); + if (unlikely(r)) { + return -1; + } + + if (unlikely(!(backend_features & VHOST_BACKEND_F_IOTLB_ASID))) { + error_setg(errp, "Device without IOTLB_ASID feature"); + return -1; + } + + r = ioctl(vdpa_device_fd, VHOST_VDPA_GET_AS_NUM, &num_as); + if (unlikely(r)) { + error_setg_errno(errp, errno, + "Cannot retrieve number of supported ASs"); + return -1; + } + if (unlikely(num_as < 2)) { + error_setg(errp, "Insufficient number of ASs (%u, min: 2)", num_as); + } + + return 0; +} + int net_init_vhost_vdpa(const Netdev *netdev, const char *name, NetClientState *peer, Error **errp) { const NetdevVhostVDPAOptions *opts; + struct vhost_vdpa_iova_range iova_range; uint64_t features; int vdpa_device_fd; g_autofree NetClientState **ncs = NULL; NetClientState *nc; int queue_pairs, r, i, has_cvq = 0; g_autoptr(VhostIOVATree) iova_tree = NULL; + ERRP_GUARD(); assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); opts = &netdev->u.vhost_vdpa; @@ -419,14 +494,35 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, qemu_close(vdpa_device_fd); return queue_pairs; } - if (opts->x_svq) { - struct vhost_vdpa_iova_range iova_range; + if (opts->x_cvq_svq || opts->x_svq) { + vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); + + uint64_t invalid_dev_features = + features & ~vdpa_svq_device_features & + /* Transport are all accepted at this point */ + ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, + VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); - if (has_cvq) { - error_setg(errp, "vdpa svq does not work with cvq"); + if (invalid_dev_features) { + error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, + invalid_dev_features); goto err_svq; } - vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); + } + + if (opts->x_cvq_svq) { + if (!has_cvq) { + error_setg(errp, "Cannot use x-cvq-svq with a device without cvq"); + goto err_svq; + } + + r = vhost_vdpa_check_cvq_svq(vdpa_device_fd, queue_pairs, errp); + if (unlikely(r)) { + error_prepend(errp, "Cannot configure CVQ SVQ: "); + goto err_svq; + } + } + if (opts->x_svq) { iova_tree = vhost_iova_tree_new(iova_range.first, iova_range.last); } @@ -441,11 +537,35 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, } if (has_cvq) { + g_autoptr(VhostIOVATree) cvq_iova_tree = NULL; + + if (opts->x_cvq_svq) { + cvq_iova_tree = vhost_iova_tree_new(iova_range.first, + iova_range.last); + } else if (opts->x_svq) { + cvq_iova_tree = vhost_iova_tree_acquire(iova_tree); + } + nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, - vdpa_device_fd, i, 1, false, opts->x_svq, - iova_tree); + vdpa_device_fd, i, 1, false, + opts->x_cvq_svq || opts->x_svq, + cvq_iova_tree); if (!nc) goto err; + + if (opts->x_cvq_svq) { + struct vhost_vring_state asid = { + .index = 1, + .num = 1, + }; + + r = ioctl(vdpa_device_fd, VHOST_VDPA_SET_GROUP_ASID, &asid); + if (unlikely(r)) { + error_setg_errno(errp, errno, + "Cannot set cvq group independent asid"); + goto err; + } + } } return 0; -- 2.27.0