From patchwork Tue Nov 8 17:07:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 13036540 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 7CE18C4332F for ; Tue, 8 Nov 2022 17:08:52 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1osS5I-0006Cc-7z; Tue, 08 Nov 2022 12:08:25 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1osS5G-0006Ab-8k for qemu-devel@nongnu.org; Tue, 08 Nov 2022 12:08:22 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1osS5E-0005vw-JE for qemu-devel@nongnu.org; Tue, 08 Nov 2022 12:08:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1667927297; 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=BrFBzOip2xxuT2jz42nrG4oeTa43nCgGcjdRVPxQm7Q=; b=SUjaig24PRYH3kQGB9wjjv7eAZRjR/yERz1VXnKNFGEHR1x8nsJPHHh6pVVgNfHaSBBkBr V6/Nl58/bxVMCz/Tb8AMounrT4Z1wVP0+JvCNv8IwkeeqQCiXu9P+fK2Iq6JFtryc/Xf1U LT+SAOCVOWxFdIpUnY7mNIvddQvTcoU= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-606-DfMxGGgvNGG7Wg5sy8FE5g-1; Tue, 08 Nov 2022 12:08:13 -0500 X-MC-Unique: DfMxGGgvNGG7Wg5sy8FE5g-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 400A4800186; Tue, 8 Nov 2022 17:08:12 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.193.47]) by smtp.corp.redhat.com (Postfix) with ESMTP id 344DAC15BB5; Tue, 8 Nov 2022 17:08:09 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Parav Pandit , Stefan Hajnoczi , Si-Wei Liu , Laurent Vivier , Harpreet Singh Anand , "Michael S. Tsirkin" , Gautam Dawar , Liuxiangdong , Stefano Garzarella , Jason Wang , Cindy Lu , Eli Cohen , Cornelia Huck , Zhu Lingshan , kvm@vger.kernel.org, "Gonglei (Arei)" , Paolo Bonzini Subject: [PATCH v6 03/10] vhost: Allocate SVQ device file descriptors at device start Date: Tue, 8 Nov 2022 18:07:48 +0100 Message-Id: <20221108170755.92768-4-eperezma@redhat.com> In-Reply-To: <20221108170755.92768-1-eperezma@redhat.com> References: <20221108170755.92768-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 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: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org The next patches will start control SVQ if possible. However, we don't know if that will be possible at qemu boot anymore. Delay device file descriptors until we know it at device start. Signed-off-by: Eugenio Pérez Acked-by: Jason Wang --- hw/virtio/vhost-shadow-virtqueue.c | 31 ++------------------------ hw/virtio/vhost-vdpa.c | 35 ++++++++++++++++++++++++------ 2 files changed, 30 insertions(+), 36 deletions(-) diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c index 264ddc166d..3b05bab44d 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -715,43 +715,18 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq) * @iova_tree: Tree to perform descriptors translations * @ops: SVQ owner callbacks * @ops_opaque: ops opaque pointer - * - * Returns the new virtqueue or NULL. - * - * In case of error, reason is reported through error_report. */ VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree, const VhostShadowVirtqueueOps *ops, void *ops_opaque) { - g_autofree VhostShadowVirtqueue *svq = g_new0(VhostShadowVirtqueue, 1); - int r; - - r = event_notifier_init(&svq->hdev_kick, 0); - if (r != 0) { - error_report("Couldn't create kick event notifier: %s (%d)", - g_strerror(errno), errno); - goto err_init_hdev_kick; - } - - r = event_notifier_init(&svq->hdev_call, 0); - if (r != 0) { - error_report("Couldn't create call event notifier: %s (%d)", - g_strerror(errno), errno); - goto err_init_hdev_call; - } + VhostShadowVirtqueue *svq = g_new0(VhostShadowVirtqueue, 1); event_notifier_init_fd(&svq->svq_kick, VHOST_FILE_UNBIND); svq->iova_tree = iova_tree; svq->ops = ops; svq->ops_opaque = ops_opaque; - return g_steal_pointer(&svq); - -err_init_hdev_call: - event_notifier_cleanup(&svq->hdev_kick); - -err_init_hdev_kick: - return NULL; + return svq; } /** @@ -763,7 +738,5 @@ void vhost_svq_free(gpointer pvq) { VhostShadowVirtqueue *vq = pvq; vhost_svq_stop(vq); - event_notifier_cleanup(&vq->hdev_kick); - event_notifier_cleanup(&vq->hdev_call); g_free(vq); } diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 7f0ff4df5b..3df2775760 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -428,15 +428,11 @@ static int vhost_vdpa_init_svq(struct vhost_dev *hdev, struct vhost_vdpa *v, shadow_vqs = g_ptr_array_new_full(hdev->nvqs, vhost_svq_free); for (unsigned n = 0; n < hdev->nvqs; ++n) { - g_autoptr(VhostShadowVirtqueue) svq; + VhostShadowVirtqueue *svq; svq = vhost_svq_new(v->iova_tree, v->shadow_vq_ops, v->shadow_vq_ops_opaque); - if (unlikely(!svq)) { - error_setg(errp, "Cannot create svq %u", n); - return -1; - } - g_ptr_array_add(shadow_vqs, g_steal_pointer(&svq)); + g_ptr_array_add(shadow_vqs, svq); } v->shadow_vqs = g_steal_pointer(&shadow_vqs); @@ -864,11 +860,23 @@ static int vhost_vdpa_svq_set_fds(struct vhost_dev *dev, const EventNotifier *event_notifier = &svq->hdev_kick; int r; + r = event_notifier_init(&svq->hdev_kick, 0); + if (r != 0) { + error_setg_errno(errp, -r, "Couldn't create kick event notifier"); + goto err_init_hdev_kick; + } + + r = event_notifier_init(&svq->hdev_call, 0); + if (r != 0) { + error_setg_errno(errp, -r, "Couldn't create call event notifier"); + goto err_init_hdev_call; + } + file.fd = event_notifier_get_fd(event_notifier); r = vhost_vdpa_set_vring_dev_kick(dev, &file); if (unlikely(r != 0)) { error_setg_errno(errp, -r, "Can't set device kick fd"); - return r; + goto err_init_set_dev_fd; } event_notifier = &svq->hdev_call; @@ -876,8 +884,18 @@ static int vhost_vdpa_svq_set_fds(struct vhost_dev *dev, r = vhost_vdpa_set_vring_dev_call(dev, &file); if (unlikely(r != 0)) { error_setg_errno(errp, -r, "Can't set device call fd"); + goto err_init_set_dev_fd; } + return 0; + +err_init_set_dev_fd: + event_notifier_set_handler(&svq->hdev_call, NULL); + +err_init_hdev_call: + event_notifier_cleanup(&svq->hdev_kick); + +err_init_hdev_kick: return r; } @@ -1089,6 +1107,9 @@ static void vhost_vdpa_svqs_stop(struct vhost_dev *dev) for (unsigned i = 0; i < v->shadow_vqs->len; ++i) { VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, i); vhost_vdpa_svq_unmap_rings(dev, svq); + + event_notifier_cleanup(&svq->hdev_kick); + event_notifier_cleanup(&svq->hdev_call); } }