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The Linux kernel configuration item CONFIG_XEN_GNTDEV_DMABUF
:
CONFIG_XEN_GNTDEV && CONFIG_XEN_GRANT_DMA_ALLOC
Allows userspace processes and kernel modules to use Xen backed dma-buf implementation. With this extension grant references to the pages of an imported dma-buf can be exported for other domain use and grant references coming from a foreign domain can be converted into a local dma-buf for local export.
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