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Tsirkin" , Jason Wang , Si-Wei Liu , Eugenio Perez Martin , Xie Yongji , Stefano Garzarella , Steve Sistare Subject: [PATCH V3 2/3] vduse: suspend Date: Mon, 20 May 2024 08:21:01 -0700 Message-Id: <1716218462-84587-3-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1716218462-84587-1-git-send-email-steven.sistare@oracle.com> References: <1716218462-84587-1-git-send-email-steven.sistare@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-05-20_05,2024-05-17_03,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 bulkscore=0 suspectscore=0 spamscore=0 mlxscore=0 adultscore=0 mlxlogscore=999 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2405010000 definitions=main-2405200122 X-Proofpoint-ORIG-GUID: L_TSt-mL4E8q1G8zZpmwZq9sQzrx6nbr X-Proofpoint-GUID: L_TSt-mL4E8q1G8zZpmwZq9sQzrx6nbr Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Support the suspend operation. There is little to do, except flush to guarantee no workers are running when suspend returns. Signed-off-by: Steve Sistare --- drivers/vdpa/vdpa_user/vduse_dev.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c index 73c89701fc9d..7dc46f771f12 100644 --- a/drivers/vdpa/vdpa_user/vduse_dev.c +++ b/drivers/vdpa/vdpa_user/vduse_dev.c @@ -472,6 +472,18 @@ static void vduse_dev_reset(struct vduse_dev *dev) up_write(&dev->rwsem); } +static void vduse_flush_work(struct vduse_dev *dev) +{ + flush_work(&dev->inject); + + for (int i = 0; i < dev->vq_num; i++) { + struct vduse_virtqueue *vq = dev->vqs[i]; + + flush_work(&vq->inject); + flush_work(&vq->kick); + } +} + static int vduse_vdpa_set_vq_address(struct vdpa_device *vdpa, u16 idx, u64 desc_area, u64 driver_area, u64 device_area) @@ -724,6 +736,17 @@ static int vduse_vdpa_reset(struct vdpa_device *vdpa) return ret; } +static int vduse_vdpa_suspend(struct vdpa_device *vdpa) +{ + struct vduse_dev *dev = vdpa_to_vduse(vdpa); + + down_write(&dev->rwsem); + vduse_flush_work(dev); + up_write(&dev->rwsem); + + return 0; +} + static u32 vduse_vdpa_get_generation(struct vdpa_device *vdpa) { struct vduse_dev *dev = vdpa_to_vduse(vdpa); @@ -806,6 +829,7 @@ static const struct vdpa_config_ops vduse_vdpa_config_ops = { .set_vq_affinity = vduse_vdpa_set_vq_affinity, .get_vq_affinity = vduse_vdpa_get_vq_affinity, .reset = vduse_vdpa_reset, + .suspend = vduse_vdpa_suspend, .set_map = vduse_vdpa_set_map, .free = vduse_vdpa_free, }; -- 2.39.3