From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:39383)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <n.nikolaev@virtualopensystems.com>)
	id 1YQx3W-0005qf-PL
	for qemu-devel@nongnu.org; Thu, 26 Feb 2015 06:56:39 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <n.nikolaev@virtualopensystems.com>)
	id 1YQx3T-0008R4-Us
	for qemu-devel@nongnu.org; Thu, 26 Feb 2015 06:56:38 -0500
Received: from mail-qg0-f48.google.com ([209.85.192.48]:63129)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <n.nikolaev@virtualopensystems.com>)
	id 1YQx3T-0008Qy-Qa
	for qemu-devel@nongnu.org; Thu, 26 Feb 2015 06:56:35 -0500
Received: by mail-qg0-f48.google.com with SMTP id l89so1899913qgf.7
	for <qemu-devel@nongnu.org>; Thu, 26 Feb 2015 03:56:35 -0800 (PST)
MIME-Version: 1.0
In-Reply-To: <20150226093625.GA24766@redhat.com>
References: <47CEA9C0E570484FBF22EF0D7EBCE5B534A4984F@szxema505-mbs.china.huawei.com>
	<20150226093625.GA24766@redhat.com>
From: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Date: Thu, 26 Feb 2015 13:55:54 +0200
Message-ID: <CADDJ2=PC8Az25mn_yTr_f43tUKEc6HiagAy06Yn4NJskzmdw8A@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Subject: Re: [Qemu-devel] [Question] about vhost user Interface
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "pbonzini@redhat.com" <pbonzini@redhat.com>, "Gaohaifeng (A)" <gaohaifeng.gao@huawei.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "Lilijun (Jerry)" <jerry.lilijun@huawei.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=E2=80=99t support msi-x interrupt, so qemu won=E2=80=99t =
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 succes=
sfully
> > 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
>