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Allow VFIO devices to list BAR indices that should not be mmapped into the guest. This lets operators skip large BARs that are known not to be used by their workload. When a BAR is skipped, the log also calls out that P2P DMA mapping is skipped because the VFIO DMA map path uses the same mmap backing. Signed-off-by: Damian Barabonkov <dbctl@pm.me> Assisted-by: OpenCode:gpt-5.5