vhost-user-scsi has a VirtioDeviceClass->reset() function that calls
->vhost_reset_device(). The other vhost devices don't notify the vhost
device upon reset.
Stateful vhost devices may need to handle device reset in order to free
resources or prevent stale device state from interfering after reset.
Call ->vhost_device_reset() from virtio_reset() so that that vhost
devices are notified of device reset.
This patch affects behavior as follows:
- vhost-kernel: No change in behavior since ->vhost_reset_device() is
not implemented.
- vhost-user: back-ends that negotiate
VHOST_USER_PROTOCOL_F_RESET_DEVICE now receive a
VHOST_USER_DEVICE_RESET message upon device reset. Otherwise there is
no change in behavior. DPDK, SPDK, libvhost-user, and the
vhost-user-backend crate do not negotiate
VHOST_USER_PROTOCOL_F_RESET_DEVICE automatically.
- vhost-vdpa: an extra SET_STATUS 0 call is made during device reset.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <
20231004014532.
1228637-4-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
}
}
-static void vhost_user_scsi_reset(VirtIODevice *vdev)
-{
- VHostSCSICommon *vsc = VHOST_SCSI_COMMON(vdev);
- struct vhost_dev *dev = &vsc->dev;
-
- if (dev->vhost_ops->vhost_reset_device) {
- dev->vhost_ops->vhost_reset_device(dev);
- }
-}
-
static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
}
vdc->get_features = vhost_scsi_common_get_features;
vdc->set_config = vhost_scsi_common_set_config;
vdc->set_status = vhost_user_scsi_set_status;
- vdc->reset = vhost_user_scsi_reset;
fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
}
return -ENOSYS;
}
+
+int vhost_reset_device(struct vhost_dev *hdev)
+{
+ if (hdev->vhost_ops->vhost_reset_device) {
+ return hdev->vhost_ops->vhost_reset_device(hdev);
+ }
+
+ return -ENOSYS;
+}
vdev->device_endian = virtio_default_endian();
}
+ if (vdev->vhost_started) {
+ vhost_reset_device(k->get_vhost(vdev));
+ }
+
if (k->reset) {
k->reset(vdev);
}
int vhost_dev_get_inflight(struct vhost_dev *dev, uint16_t queue_size,
struct vhost_inflight *inflight);
bool vhost_dev_has_iommu(struct vhost_dev *dev);
+
+#ifdef CONFIG_VHOST
+int vhost_reset_device(struct vhost_dev *hdev);
+#else
+static inline int vhost_reset_device(struct vhost_dev *hdev)
+{
+ return -ENOSYS;
+}
+#endif /* CONFIG_VHOST */
+
#endif
config_host_data.set('CONFIG_TSAN', get_option('tsan'))
config_host_data.set('CONFIG_USB_LIBUSB', libusb.found())
config_host_data.set('CONFIG_VDE', vde.found())
+config_host_data.set('CONFIG_VHOST', have_vhost)
config_host_data.set('CONFIG_VHOST_NET', have_vhost_net)
config_host_data.set('CONFIG_VHOST_NET_USER', have_vhost_net_user)
config_host_data.set('CONFIG_VHOST_NET_VDPA', have_vhost_net_vdpa)