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vhost: fail device start if iotlb update fails

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While starting a vhost device, updating iotlb entries
via 'vhost_device_iotlb_miss' may return an error.

  qemu-kvm: vhost_device_iotlb_miss:
    700871,700871: Fail to update device iotlb

Fail device start when such an error occurs.

Signed-off-by: Prasad Pandit <pjp@fedoraproject.org>
Message-Id: <20241107113247.46532-1-ppandit@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
This commit is contained in:
Prasad Pandit 2024-11-07 17:02:47 +05:30 • committed by Michael S. Tsirkin
parent 5d52529462
commit 571bdc97b8
1 changed files with 12 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

13
hw/virtio/vhost.c
View file

@ -2095,11 +2095,22 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev, bool vrings)
* vhost-kernel code requires for this.*/
for (i = 0; i < hdev->nvqs; ++i) {
struct vhost_virtqueue *vq = hdev->vqs + i;
vhost_device_iotlb_miss(hdev, vq->used_phys, true);
r = vhost_device_iotlb_miss(hdev, vq->used_phys, true);
if (r) {
goto fail_iotlb;
}
}
}
vhost_start_config_intr(hdev);
return 0;
fail_iotlb:
if (vhost_dev_has_iommu(hdev) &&
hdev->vhost_ops->vhost_set_iotlb_callback) {
hdev->vhost_ops->vhost_set_iotlb_callback(hdev, false);
}
if (hdev->vhost_ops->vhost_dev_start) {
hdev->vhost_ops->vhost_dev_start(hdev, false);
}
fail_start:
if (vrings) {
vhost_dev_set_vring_enable(hdev, false);