Re: [virtio-dev] [PATCH v3 0/7] Vhost-pci for inter-VM communication

[Stefan Hajnoczi <stefanha@redhat.com>]

On Tue, Dec 05, 2017 at 11:33:09AM +0800, Wei Wang wrote:
> Vhost-pci is a point-to-point based inter-VM communication solution. This
> patch series implements the vhost-pci-net device setup and emulation. The
> device is implemented as a virtio device, and it is set up via the
> vhost-user protocol to get the neessary info (e.g the memory info of the
> remote VM, vring info).
> 
> Currently, only the fundamental functions are implemented. More features,
> such as MQ and live migration, will be updated in the future.
> 
> The DPDK PMD of vhost-pci has been posted to the dpdk mailinglist here:
> http://dpdk.org/ml/archives/dev/2017-November/082615.html
> 
> v2->v3 changes:
> 1) static device creation: instead of creating and hot-plugging the
>    device when receiving a vhost-user msg, the device is not created
>    via the qemu booting command line.
> 2) remove vqs: rq and ctrlq are removed in this version.
>     - receive vq: the receive vq is not needed anymore. The PMD directly
>                   shares the remote txq and rxq - grab from remote txq to
>                   receive packets, and put to rxq to send packets.
>     - ctrlq: the ctrlq is replaced by the first 4KB metadata area of the
>              device Bar-2.
> 3) simpler implementation: the entire implementation has been tailored
>    from ~1800 LOC to ~850 LOC.

Please write qtest test cases for vhost-pci.  See
tests/virtio-net-test.c and tests/vhost-user-test.c for examples.

Stefan

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