Anthony Liguori wrote:
Avi Kivity wrote:
Anthony Liguori wrote:
This is a PCI device that implements a transport for virtio. It allows virtio
devices to be used by QEMU based VMMs like KVM or Xen.
Didn't see support for dma.
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
You would also lose performance since pv-dma will trigger an exit for
each virtio io while
virtio kicks the hypervisor after several IOs were queued.
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