On 04/05/16 16:52, Alexey Kardashevskiy wrote:
> This allows dynamic allocation for migrating arrays.
>
> Already existing VMSTATE_VARRAY_UINT32 requires an array to be
> pre-allocated, however there are cases when the size is not known in
> advance and there is no real need to enforce it.
>
> This defines another variant of VMSTATE_VARRAY_UINT32 with WMS_ALLOC
> flag which tells the receiving side to allocate memory for the array
> before receiving the data.
>
> The first user of it is a dynamic DMA window which existence and size
> are totally dynamic.
>
> Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
> Reviewed-by: David Gibson <da...@gibson.dropbear.id.au>
> Reviewed-by: Thomas Huth <th...@redhat.com>
In what tree is this going to go? pseries? Or migration?
> ---
> include/migration/vmstate.h | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
> index 84ee355..1622638 100644
> --- a/include/migration/vmstate.h
> +++ b/include/migration/vmstate.h
> @@ -386,6 +386,16 @@ extern const VMStateInfo vmstate_info_bitmap;
> .offset = vmstate_offset_pointer(_state, _field, _type), \
> }
>
> +#define VMSTATE_VARRAY_UINT32_ALLOC(_field, _state, _field_num, _version,
> _info, _type) {\
> + .name = (stringify(_field)), \
> + .version_id = (_version), \
> + .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
> + .info = &(_info), \
> + .size = sizeof(_type), \
> + .flags = VMS_VARRAY_UINT32|VMS_POINTER|VMS_ALLOC, \
> + .offset = vmstate_offset_pointer(_state, _field, _type), \
> +}
> +
> #define VMSTATE_VARRAY_UINT16_UNSAFE(_field, _state, _field_num, _version,
> _info, _type) {\
> .name = (stringify(_field)), \
> .version_id = (_version), \
>
--
Alexey
