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The new convert_key callback function handles re-creating protected keys from their related secure keys. It is called after an LGR when continuing to run on the new system. This includes locking/unlocking of related key objects and retrying the operation if another LGR happens in the middle of the process. It also handles the case where creating the protected key from an XTS key1 happened on the old system, but creating the protected key from XTS key2 happens on the new system after an LGR. Lastly, the verification pattern of the firmware wrapping key on the new system is saved in cca_data. Signed-off-by: Joerg Schmidbauer <jschmidb@de.ibm.com>