[PATCH Kernel v22 8/8] vfio: Selective dirty page tracking if IOMMU backed device pins pages

Added a check such that only singleton IOMMU groups can pin pages. >From the point when vendor driver pins any pages, consider IOMMU group dirty page scope to be limited to pinned pages. To optimize to avoid walking list often, added flag pinned_page_dirty_scope to indicate if all of the

[PATCH Kernel v22 8/8] vfio: Selective dirty page tracking if IOMMU backed device pins pages

Added a check such that only singleton IOMMU groups can pin pages. >From the point when vendor driver pins any pages, consider IOMMU group dirty page scope to be limited to pinned pages. To optimize to avoid walking list often, added flag pinned_page_dirty_scope to indicate if all of the