Re: [Qemu-devel] [PATCH] virtio-9p: migrate virtio subsections

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

Greg Kurz <gkurz@linux.vnet.ibm.com> writes:

> In a cross-endian setup, the virtio-9p device has state in @device_endian. It
> must be migrated.
>
> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>

With 9p mounted, we don't support qemu migration. We still have
migration blocker added in v9fs_attach.


> ---
>  hw/9pfs/virtio-9p-device.c |   11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
> index 93a407c45926..e3abcfaffb2a 100644
> --- a/hw/9pfs/virtio-9p-device.c
> +++ b/hw/9pfs/virtio-9p-device.c
> @@ -43,6 +43,16 @@ static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
>      g_free(cfg);
>  }
>
> +static void virtio_9p_save(QEMUFile *f, void *opaque)
> +{
> +    virtio_save(VIRTIO_DEVICE(opaque), f);
> +}
> +
> +static int virtio_9p_load(QEMUFile *f, void *opaque, int version_id)
> +{
> +    return virtio_load(VIRTIO_DEVICE(opaque), f, version_id);
> +}
> +
>  static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
>  {
>      VirtIODevice *vdev = VIRTIO_DEVICE(dev);
> @@ -130,6 +140,7 @@ static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
>      }
>      v9fs_path_free(&path);
>
> +    register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, s);
>      return;
>  out:
>      g_free(s->ctx.fs_root);