Re: [Qemu-devel] [Question] about vhost user Interface

[Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>]

On Thu, Feb 26, 2015 at 11:36 AM, Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Thu, Feb 26, 2015 at 09:30:40AM +0000, Gaohaifeng (A) wrote:
> > Hi
> >
> >   I want to use pxe to install a guest os whose nic type is vhost user. However
> > pxe rom doesn’t support msi-x interrupt, so qemu won’t start vhost net.
> >
> > Call relationship:
> >
> > virtio_net_vhost_status-> vhost_net_query-> vhost_dev_query->
> > virtio_pci_query_guest_notifiers -> msix_enabled
> >
> >
> >
> > In my test, I remove the msix check for vhost user interface and successfully
> > install the guest os by pxe.
> >
> > Is it OK to do like this and will it cause other problems?
> >
> >
> >
> > Thanks.
> >
> > Haifeng Gao
> >
>
> I think we should fix it.
> As a quick hack, you should be able to just use vhostforce.


But isn't that what vhostforce is for, runnign vhost with non
MSI-enabled guests?

regards,
Nikolay Nikolaev

>
>
> --
> MST
>