vfio: introduce vfio_dma_rw to read/write a range of IOVAs

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vfio_dma_rw will read/write a range of user space memory pointed to by
IOVA into/from a kernel buffer without enforcing pinning the user space
memory.

TODO: mark the IOVAs to user space memory dirty if they are written in
vfio_dma_rw().

Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

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Yan Zhao 2020-03-24 09:27:57 -06:00 • committed by Alex Williamson

parent c0560f51cf

commit 8d46c0cca5

3 changed files with 130 additions and 0 deletions

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49

drivers/vfio/vfio.c

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76

drivers/vfio/vfio_iommu_type1.c

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5

include/linux/vfio.h

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