vfio iommu: Add blocking notifier to notify DMA_UNMAP

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Added blocking notifier to IOMMU TYPE1 driver to notify vendor drivers
about DMA_UNMAP.
Exported two APIs vfio_register_notifier() and vfio_unregister_notifier().
Notifier should be registered, if external user wants to use
vfio_pin_pages()/vfio_unpin_pages() APIs to pin/unpin pages.
Vendor driver should use VFIO_IOMMU_NOTIFY_DMA_UNMAP action to invalidate
mappings.

Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Neo Jia <cjia@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

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Kirti Wankhede 2016-11-17 10:28:26 +05:30 • committed by Alex Williamson

parent a54eb55045

commit c086de818d

3 changed files with 146 additions and 13 deletions

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73

drivers/vfio/vfio.c

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74

drivers/vfio/vfio_iommu_type1.c

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12

include/linux/vfio.h

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