Commit 705124ea authored by Alexey Kardashevskiy's avatar Alexey Kardashevskiy Committed by David Gibson
Browse files

vmstate: Define VARRAY with VMS_ALLOC 



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: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Reviewed-by: default avatarThomas Huth <thuth@redhat.com>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent 44f2e6c1

include/migration/vmstate.h

+10 −0
Original line number Diff line number Diff line
@@ -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),                                        \