Re: [Qemu-devel] [PATCH] vmstate: Add unmigratable flag

[Anthony Liguori]

On 06/09/2011 11:44 AM, Jan Kiszka wrote:
> A first step towards getting rid of register_device_unmigratable
> (ivshmem and lacking vmstate support in virtio are blocking this):
>
> Allow to register an unmigratable vmstate via qdev, i.e. tag a device
> declaratively.

I thought part of the problem with this was that for some devices (like 
ivshmem), whether it can be migrated was dynamic.  It depends on 
configuration, state, etc.

Regards,

Anthony Liguori

> Signed-off-by: Jan Kiszka<address@hidden>
> ---
>   hw/hw.h  |    1 +
>   savevm.c |    1 +
>   2 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/hw/hw.h b/hw/hw.h
> index 56447a7..97c474e 100644
> --- a/hw/hw.h
> +++ b/hw/hw.h
> @@ -333,6 +333,7 @@ struct VMStateDescription {
>       void (*pre_save)(void *opaque);
>       VMStateField *fields;
>       const VMStateSubsection *subsections;
> +    bool unmigratable;
>   };
>
>   extern const VMStateInfo vmstate_info_bool;
> diff --git a/savevm.c b/savevm.c
> index 939845c..98b2422 100644
> --- a/savevm.c
> +++ b/savevm.c
> @@ -1234,6 +1234,7 @@ int vmstate_register_with_alias_id(DeviceState *dev, int 
> instance_id,
>       se->opaque = opaque;
>       se->vmsd = vmsd;
>       se->alias_id = alias_id;
> +    se->no_migrate = vmsd->unmigratable;
>
>       if (dev&&  dev->parent_bus&&  dev->parent_bus->info->get_dev_path) {
>           char *id = dev->parent_bus->info->get_dev_path(dev);