tree ee573623265886c04820b64180876929f64663e4
parent 016f7758985290c8ca79fc9842fd697d61cbc0b0
author Alexey Kardashevskiy <aik@ozlabs.ru> 1412243763 +1000
committer Alexander Graf <agraf@suse.de> 1415139973 +0100

spapr_nvram: Enable migration

The only case when sPAPR NVRAM migrates now is if is backed by a file and
copy-storage migration is performed. In other cases NVRAM does not
migrate regardless whether it is backed by a file or not.

This enables shadow copy of NVRAM in RAM which is read from a file
(if used) and used for reads. Writes to NVRAM are mirrored to the file.

This defines a VMSTATE descriptor for NVRAM device so the memory copy
of NVRAM can migrate and be flushed to a backing file on the destination
if one is specified.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>