vfio-ccw: Factor out the ccw0-to-ccw1 transition
This is a really useful function, but it's buried in the copy_ccw_from_iova() routine so that ccwchain_calc_length() can just work with Format-1 CCWs while doing its counting. But it means we're translating a full 2K of "CCWs" to Format-1, when in reality there's probably far fewer in that space. Let's factor it out, so maybe we can do something with it later. Signed-off-by:Eric Farman <farman@linux.ibm.com> Message-Id: <20190618202352.39702-5-farman@linux.ibm.com> Reviewed-by:
Cornelia Huck <cohuck@redhat.com> Reviewed-by:
Farhan Ali <alifm@linux.ibm.com> Signed-off-by:
Cornelia Huck <cohuck@redhat.com>
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