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| H A D | vfio_ccw_cp.c | diff c5e8083f9580bd7b32ca3967e3d2f99b38cfdaa6 Thu Jul 07 10:30:26 CDT 2022 Eric Farman <farman@linux.ibm.com> vfio/ccw: replace copy_from_iova with vfio_dma_rw
It was suggested [1] that we replace the old copy_from_iova() routine
(which pins a page, does a memcpy, and unpins the page) with the
newer vfio_dma_rw() interface.
This has a modest improvement in the overall time spent through the
fsm_io_request() path, and simplifies some of the code to boot.
[1] https://lore.kernel.org/r/20220706170553.GK693670@nvidia.com/
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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