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e3d8707358
To cover pagemap paths scanning PMD entries, add assertions to check whether a device-private PMD entry has the correct pagemap information - the PM_SWAP bit must be on in the pagemap entry. Before that, we must assert through HMM_DMIRROR_SNAPSHOT snapshot that the leaf entry is at PMD level and not PTE level. Link: https://lore.kernel.org/20260604055308.1947679-3-dev.jain@arm.com Signed-off-by: Dev Jain <dev.jain@arm.com> Reviewed-by: Lorenzo Stoakes <ljs@kernel.org> Cc: Balbir Singh <balbirs@nvidia.com> Cc: David Hildenbrand (Arm) <david@kernel.org> Cc: Oscar Salvador (SUSE) <osalvador@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>