From nobody Sun Feb 8 12:38:12 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1633926810059335.53394988219566; Sun, 10 Oct 2021 21:33:30 -0700 (PDT) Received: from localhost ([::1]:38558 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mZn0D-0007wN-0F for importer@patchew.org; Mon, 11 Oct 2021 00:33:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44674) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mZmwH-0001Ma-AN for qemu-devel@nongnu.org; Mon, 11 Oct 2021 00:29:25 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:50840) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mZmwF-0003vQ-Js for qemu-devel@nongnu.org; Mon, 11 Oct 2021 00:29:25 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-40-T1zNHA5kOPiAVMxvYYsCTg-1; Mon, 11 Oct 2021 00:29:19 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 562751006AAF; Mon, 11 Oct 2021 04:29:18 +0000 (UTC) Received: from localhost.localdomain (ovpn-13-160.pek2.redhat.com [10.72.13.160]) by smtp.corp.redhat.com (Postfix) with ESMTP id 78E3E399; Mon, 11 Oct 2021 04:29:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1633926563; 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=ebizvWEx1TbZ28G6F4sTh2GocUNCYKO8lOxG98jij4c=; b=XsApGDkOR62Xz8mQCjoSr1M3Dm0EYx4hvCkPJOcliyoTnyZGgVJXxYYegYVo4hjmOnmz6i YBggDyo8O3TFkEHRjkPtmjgIc7HmVAqr4J1DsOn0y2UpARJH44IqZFUMD2ScA6wFetRVUh vkWzN8fgnX+CWRnC7/Q+5EAbdmAjDuI= X-MC-Unique: T1zNHA5kOPiAVMxvYYsCTg-1 From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, qemu-devel@nongnu.org Subject: [PATCH V4 09/10] virtio-net: vhost control virtqueue support Date: Mon, 11 Oct 2021 12:28:28 +0800 Message-Id: <20211011042829.4159-10-jasowang@redhat.com> In-Reply-To: <20211011042829.4159-1-jasowang@redhat.com> References: <20211011042829.4159-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=jasowang@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=-0.049, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: eperezma@redhat.com, elic@nvidia.com, gdawar@xilinx.com, lingshan.zhu@intel.com, lulu@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1633926812217100001 Content-Type: text/plain; charset="utf-8" This patch implements the control virtqueue support for vhost. This requires virtio-net to figure out the datapath queue pairs and control virtqueue via is_datapath and pass the number of those two types of virtqueues to vhost_net_start()/vhost_net_stop(). Signed-off-by: Jason Wang Message-Id: <20210907090322.1756-10-jasowang@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/net/vhost_net.c | 2 +- hw/net/virtio-net.c | 23 +++++++++++++++++++---- include/hw/virtio/virtio-net.h | 1 + 3 files changed, 21 insertions(+), 5 deletions(-) diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index 3aabab06ea..0d888f29a6 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -326,7 +326,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *= ncs, VirtIONet *n =3D VIRTIO_NET(dev); int nvhosts =3D data_queue_pairs + cvq; struct vhost_net *net; - int r, e, i, last_index =3D data_qps * 2; + int r, e, i, last_index =3D data_queue_pairs * 2; NetClientState *peer; =20 if (!cvq) { diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 2ade019b22..57a0cbc6cd 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -244,6 +244,7 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8= _t status) VirtIODevice *vdev =3D VIRTIO_DEVICE(n); NetClientState *nc =3D qemu_get_queue(n->nic); int queue_pairs =3D n->multiqueue ? n->max_queue_pairs : 1; + int cvq =3D n->max_ncs - n->max_queue_pairs; =20 if (!get_vhost_net(nc->peer)) { return; @@ -285,14 +286,14 @@ static void virtio_net_vhost_status(VirtIONet *n, uin= t8_t status) } =20 n->vhost_started =3D 1; - r =3D vhost_net_start(vdev, n->nic->ncs, queue_pairs, 0); + r =3D vhost_net_start(vdev, n->nic->ncs, queue_pairs, cvq); if (r < 0) { error_report("unable to start vhost net: %d: " "falling back on userspace virtio", -r); n->vhost_started =3D 0; } } else { - vhost_net_stop(vdev, n->nic->ncs, queue_pairs, 0); + vhost_net_stop(vdev, n->nic->ncs, queue_pairs, cvq); n->vhost_started =3D 0; } } @@ -3393,9 +3394,23 @@ static void virtio_net_device_realize(DeviceState *d= ev, Error **errp) return; } =20 - n->max_queue_pairs =3D MAX(n->nic_conf.peers.queues, 1); + n->max_ncs =3D MAX(n->nic_conf.peers.queues, 1); + + /* + * Figure out the datapath queue pairs since the backend could + * provide control queue via peers as well. + */ + if (n->nic_conf.peers.queues) { + for (i =3D 0; i < n->max_ncs; i++) { + if (n->nic_conf.peers.ncs[i]->is_datapath) { + ++n->max_queue_pairs; + } + } + } + n->max_queue_pairs =3D MAX(n->max_queue_pairs, 1); + if (n->max_queue_pairs * 2 + 1 > VIRTIO_QUEUE_MAX) { - error_setg(errp, "Invalid number of queue_pairs (=3D %" PRIu32 "),= " + error_setg(errp, "Invalid number of queue pairs (=3D %" PRIu32 "),= " "must be a positive integer less than %d.", n->max_queue_pairs, (VIRTIO_QUEUE_MAX - 1) / 2); virtio_cleanup(vdev); diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h index 71cbdc26d7..08ee6dea39 100644 --- a/include/hw/virtio/virtio-net.h +++ b/include/hw/virtio/virtio-net.h @@ -196,6 +196,7 @@ struct VirtIONet { int multiqueue; uint16_t max_queue_pairs; uint16_t curr_queue_pairs; + uint16_t max_ncs; size_t config_size; char *netclient_name; char *netclient_type; --=20 2.25.1