From nobody Mon Feb 9 13:08:17 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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=linux.alibaba.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1658152858087902.232978728938; Mon, 18 Jul 2022 07:00:58 -0700 (PDT) Received: from localhost ([::1]:58794 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oDRIu-0002wM-QI for importer@patchew.org; Mon, 18 Jul 2022 10:00:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37446) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDOpn-0007XR-R6 for qemu-devel@nongnu.org; Mon, 18 Jul 2022 07:22:43 -0400 Received: from out30-133.freemail.mail.aliyun.com ([115.124.30.133]:41858) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDOph-0000ig-OV for qemu-devel@nongnu.org; Mon, 18 Jul 2022 07:22:43 -0400 Received: from localhost(mailfrom:kangjie.xu@linux.alibaba.com fp:SMTPD_---0VJioD7T_1658143044) by smtp.aliyun-inc.com; Mon, 18 Jul 2022 19:17:24 +0800 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R151e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=ay29a033018046059; MF=kangjie.xu@linux.alibaba.com; NM=1; PH=DS; RN=5; SR=0; TI=SMTPD_---0VJioD7T_1658143044; From: Kangjie Xu To: qemu-devel@nongnu.org Cc: mst@redhat.com, jasowang@redhat.com, hengqi@linux.alibaba.com, xuanzhuo@linux.alibaba.com Subject: [PATCH 11/16] vhost: introduce restart and release for vhost_dev's vqs Date: Mon, 18 Jul 2022 19:17:08 +0800 Message-Id: <98cc06919b016e16b9abc606dd514ac2b4f85c06.1658141552.git.kangjie.xu@linux.alibaba.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: References: MIME-Version: 1.0 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=115.124.30.133; envelope-from=kangjie.xu@linux.alibaba.com; helo=out30-133.freemail.mail.aliyun.com X-Spam_score_int: -98 X-Spam_score: -9.9 X-Spam_bar: --------- X-Spam_report: (-9.9 / 5.0 requ) BAYES_00=-1.9, ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, UNPARSEABLE_RELAY=0.001, USER_IN_DEF_SPF_WL=-7.5 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Mon, 18 Jul 2022 09:49:05 -0400 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1658152860066100001 Content-Type: text/plain; charset="utf-8" Introduce vhost_dev_virtqueue_restart(), which can restart the virtqueue when the vhost has already started running. Meanwhile, vhost_dev_virtqueue_release(), which can ummap the vrings and the desc of a specific vq of a device. Combining the two functions, we can reset a virtqueue with a started vhost. Signed-off-by: Kangjie Xu Signed-off-by: Xuan Zhuo --- hw/virtio/vhost.c | 29 +++++++++++++++++++++++++++++ include/hw/virtio/vhost.h | 6 ++++++ 2 files changed, 35 insertions(+) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index e467dfc7bc..d158d71866 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1904,3 +1904,32 @@ int vhost_net_set_backend(struct vhost_dev *hdev, =20 return -ENOSYS; } + +void vhost_dev_virtqueue_release(struct vhost_dev *hdev, VirtIODevice *vde= v, + int vq_index) +{ + int idx =3D vq_index - hdev->vq_index; + + idx =3D hdev->vhost_ops->vhost_get_vq_index(hdev, idx); + + vhost_virtqueue_unmap(hdev, + vdev, + hdev->vqs + idx, + hdev->vq_index + idx); +} + +int vhost_dev_virtqueue_restart(struct vhost_dev *hdev, VirtIODevice *vdev, + int vq_index) +{ + int idx =3D vq_index - hdev->vq_index; + int r =3D 0; + + idx =3D hdev->vhost_ops->vhost_get_vq_index(hdev, idx); + + r =3D vhost_virtqueue_start(hdev, + vdev, + hdev->vqs + idx, + hdev->vq_index + idx); + + return r; +} diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index a346f23d13..7df7dbe24d 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -277,6 +277,12 @@ bool vhost_has_free_slot(void); int vhost_net_set_backend(struct vhost_dev *hdev, struct vhost_vring_file *file); =20 + +void vhost_dev_virtqueue_release(struct vhost_dev *hdev, VirtIODevice *vde= v, + int vq_index); +int vhost_dev_virtqueue_restart(struct vhost_dev *hdev, VirtIODevice *vdev, + int vq_index); + int vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int writ= e); =20 void vhost_dev_reset_inflight(struct vhost_inflight *inflight); --=20 2.32.0