Avi Kivity wrote:You would also lose performance since pv-dma will trigger an exit for each virtio io while
Anthony Liguori wrote:
This is a PCI device that implements a transport for virtio. It allows virtioDidn't see support for dma.
devices to be used by QEMU based VMMs like KVM or Xen.
Not sure what you're expecting there. Using dma_ops in virtio_ring?
I think that with Amit's pvdma patches you
can support dma-capable devices as well without too much fuss.
What is the use case you're thinking of? A semi-paravirt driver that does dma directly to a device?
Regards,
Anthony Liguori
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