tree 871c8f000b5b07a4230647b2bf807b5e5c79d2f8
parent 3ab7a0b40d4be5ade3b61d4afd1518193b199423
author Matthew Rosato <mjrosato@linux.ibm.com> 1603726473 -0400
committer Alex Williamson <alex.williamson@redhat.com> 1604259051 -0700

vfio: Find DMA available capability

The underlying host may be limiting the number of outstanding DMA
requests for type 1 IOMMU.  Add helper functions to check for the
DMA available capability and retrieve the current number of DMA
mappings allowed.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[aw: vfio_get_info_dma_avail moved inside CONFIG_LINUX]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>