On Mon, Mar 08, 2021 at 02:47:16PM -0700, Alex Williamson wrote: > The primary goal of this series is to better manage device memory > mappings, both with a much simplified scheme to zap CPU mappings of > device memory using unmap_mapping_range() and also to restrict IOMMU > mappings of PFNMAPs to vfio device memory and drop those mappings on > device release. This series updates vfio-pci to include the necessary > vma-to-pfn interface, allowing the type1 IOMMU backend to recognize > vfio device memory. If other bus drivers support peer-to-peer DMA, > they should be updated with a similar callback and trigger the device > notifier on release. I only skimmed it for now, but it looks pretty good I need to sit down and take a very careful look at all of this, my rdma address_space patch included.. Jason
