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Description of problem:

The current dpdk virtio-pmd does not support VFIO. 
This support is required in order to be able to use the dpdk driver 
securely from user space on the KVM guest. Otherwise, the driver has full access to all guest memory (including guest kernel and other user processes) so that a user space bug can cause a kernel crash.
Performance needs to be compatible with running DPDK on bare metal for device assignment and to existing insecure virtio-pmd when using vhost-user

Correction on performance: Performance needs to be compatible with existing insecure virtio-pmd when using vhost-user (not with bare metal)

Support for VFIO-NOIOMMU was added to DPDH 16.04.
DPDK can now work with VFIO:
1. For now: using RTE_VFIO_NOIOMMU, which uses VFIO but has no 
   IOMMU, and hence it is not supported by RH (just a temporary solution).
2. In future: using the normal RTE_VFIO_TYPE1 once vIOMMU is implemented 
   in VFIO.

Bug#1335808 is tracking the vIOMMU implementation that will enable it in 
qemu.

Bug#1299662 added support for the No-IOMMU mode in the VFIO driver.

Looks OK, maybe only to add, that full support is expected in 7.4