diff options
Diffstat (limited to 'arch/um/drivers/virtio_uml.c')
| -rw-r--r-- | arch/um/drivers/virtio_uml.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index ef620caed8e7..9db9d00b2dc2 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -65,6 +65,7 @@ struct virtio_uml_vq_info { vq_callback_t *callback; struct time_travel_event defer; #endif + bool suspended; }; extern unsigned long long physmem_size, highmem; @@ -725,6 +726,9 @@ static bool vu_notify(struct virtqueue *vq) const uint64_t n = 1; int rc; + if (info->suspended) + return true; + time_travel_propagate_time(); if (info->kick_fd < 0) { @@ -1288,6 +1292,36 @@ static const struct of_device_id virtio_uml_match[] = { }; MODULE_DEVICE_TABLE(of, virtio_uml_match); +static int virtio_uml_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct virtio_uml_device *vu_dev = platform_get_drvdata(pdev); + struct virtqueue *vq; + + virtio_device_for_each_vq((&vu_dev->vdev), vq) { + struct virtio_uml_vq_info *info = vq->priv; + + info->suspended = true; + vhost_user_set_vring_enable(vu_dev, vq->index, false); + } + + return 0; +} + +static int virtio_uml_resume(struct platform_device *pdev) +{ + struct virtio_uml_device *vu_dev = platform_get_drvdata(pdev); + struct virtqueue *vq; + + virtio_device_for_each_vq((&vu_dev->vdev), vq) { + struct virtio_uml_vq_info *info = vq->priv; + + info->suspended = false; + vhost_user_set_vring_enable(vu_dev, vq->index, true); + } + + return 0; +} + static struct platform_driver virtio_uml_driver = { .probe = virtio_uml_probe, .remove = virtio_uml_remove, @@ -1295,6 +1329,8 @@ static struct platform_driver virtio_uml_driver = { .name = "virtio-uml", .of_match_table = virtio_uml_match, }, + .suspend = virtio_uml_suspend, + .resume = virtio_uml_resume, }; static int __init virtio_uml_init(void) |