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. > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > kvm-devel mailing list > kvm-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kvm-devel > >
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