Merge tag 'vfio-v6.18-rc1-pt2' of https://github.com/awilliam/linux-vfio

Pull more VFIO updates from Alex Williamson:

 - Optimizations for DMA map and unmap opertions through the type1 vfio
   IOMMU backend.

   This uses various means of batching and hints from the mm structures
   to improve efficiency and therefore performance, resulting in a
   significant speedup for huge page use cases (Li Zhe)

 - Expose supported device migration features through debugfs (Cédric Le
   Goater)

* tag 'vfio-v6.18-rc1-pt2' of https://github.com/awilliam/linux-vfio:
  vfio: Dump migration features under debugfs
  vfio/type1: optimize vfio_unpin_pages_remote()
  vfio/type1: introduce a new member has_rsvd for struct vfio_dma
  vfio/type1: batch vfio_find_vpfn() in function vfio_unpin_pages_remote()
  vfio/type1: optimize vfio_pin_pages_remote()
  mm: introduce num_pages_contiguous()

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