From nobody Mon Feb 9 09:52:34 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 16310056090301000.10815107174; Tue, 7 Sep 2021 02:06:49 -0700 (PDT) Received: from localhost ([::1]:46972 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mNX44-0007K7-0c for importer@patchew.org; Tue, 07 Sep 2021 05:06:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54188) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNX1c-0003aM-AQ for qemu-devel@nongnu.org; Tue, 07 Sep 2021 05:04:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:22225) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNX1a-000599-Mh for qemu-devel@nongnu.org; Tue, 07 Sep 2021 05:04:15 -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-354-NcP2qyOcPW-HU4pCbo9Czw-1; Tue, 07 Sep 2021 05:04:13 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1E6FB8010F4; Tue, 7 Sep 2021 09:04:12 +0000 (UTC) Received: from localhost.localdomain (ovpn-12-183.pek2.redhat.com [10.72.12.183]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5CC6B5C25D; Tue, 7 Sep 2021 09:04:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1631005454; 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=0S08/s4PvwYBIXNIJQZrcl+7drWjd11Gf+x6eK6zE8k=; b=Fmu8cy7M0f7zmTtAq7ETyl+4my9GeTyzeHVvtHwRd8p7ng9saQKOh1/CyJhnND82fMap8O KqqmD6/rtimAQR+YCC6CqN2YmGezAbT8JCLsTdicS8N4nmfV02CTW1S1KUFgLonvyDNiY3 xS5ymi1gHqnYpRshyHpiOqOZS6ksImo= X-MC-Unique: NcP2qyOcPW-HU4pCbo9Czw-1 From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, qemu-devel@nongnu.org Subject: [PATCH V3 08/10] vhost: record the last virtqueue index for the virtio device Date: Tue, 7 Sep 2021 17:03:20 +0800 Message-Id: <20210907090322.1756-9-jasowang@redhat.com> In-Reply-To: <20210907090322.1756-1-jasowang@redhat.com> References: <20210907090322.1756-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 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: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.391, 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: 1631005609693100001 Content-Type: text/plain; charset="utf-8" This patch introduces a new field in the vhost_dev structure to record the last virtqueue index for the virtio device. This will be useful for the vhost backends with 1:N model to start or stop the device after all the vhost_dev structures were started or stopped. Signed-off-by: Jason Wang --- hw/net/vhost_net.c | 12 +++++++++--- include/hw/virtio/vhost.h | 2 ++ 2 files changed, 11 insertions(+), 3 deletions(-) diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index 2b594b4642..3aabab06ea 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -231,9 +231,11 @@ fail: return NULL; } =20 -static void vhost_net_set_vq_index(struct vhost_net *net, int vq_index) +static void vhost_net_set_vq_index(struct vhost_net *net, int vq_index, + int last_index) { net->dev.vq_index =3D vq_index; + net->dev.last_index =3D last_index; } =20 static int vhost_net_start_one(struct vhost_net *net, @@ -324,9 +326,13 @@ 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; + int r, e, i, last_index =3D data_qps * 2; NetClientState *peer; =20 + if (!cvq) { + last_index -=3D 1; + } + if (!k->set_guest_notifiers) { error_report("binding does not support guest notifiers"); return -ENOSYS; @@ -341,7 +347,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *= ncs, } =20 net =3D get_vhost_net(peer); - vhost_net_set_vq_index(net, i * 2); + vhost_net_set_vq_index(net, i * 2, last_index); =20 /* Suppress the masking guest notifiers on vhost user * because vhost user doesn't interrupt masking/unmasking diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 1a9fc65089..3fa0b554ef 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -74,6 +74,8 @@ struct vhost_dev { unsigned int nvqs; /* the first virtqueue which would be used by this vhost dev */ int vq_index; + /* the last vq index for the virtio device (not vhost) */ + int last_index; /* if non-zero, minimum required value for max_queues */ int num_queues; uint64_t features; --=20 2.25.1