tree 3f40dbe93c1b0120246eab829f33490a127e336c
parent 88d7ab8949427f492c39f6daf0ac67f0242a88bc
author Alex Williamson <alex.williamson@redhat.com> 1393439920 -0700
committer Alex Williamson <alex.williamson@redhat.com> 1393439920 -0700

kvm/vfio: Support for DMA coherent IOMMUs

VFIO now has support for using the IOMMU_CACHE flag and a mechanism
for an external user to test the current operating mode of the IOMMU.
Add support for this to the kvm-vfio pseudo device so that we only
register noncoherent DMA when necessary.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>