This enables PAPR defined feature called Dynamic DMA windows (DDW).
Each Partitionable Endpoint (IOMMU group) has a separate DMA window on
a PCI bus where devices are allows to perform DMA. By default there is
1 or 2GB window allocated at the host boot time and these windows are
used when an
This enables PAPR defined feature called Dynamic DMA windows (DDW).
Each Partitionable Endpoint (IOMMU group) has a separate DMA window on
a PCI bus where devices are allows to perform DMA. By default there is
1 or 2GB window allocated at the host boot time and these windows are
used when an
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