linux-kernel - Re: [PATCHv5 3/3] vhost_net: a kernel-level virtio server

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Message-ID: <20090915204036.GA27954@redhat.com>
Date:	Tue, 15 Sep 2009 23:40:37 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Gregory Haskins <gregory.haskins@...il.com>
Cc:	Avi Kivity <avi@...hat.com>,
	"Ira W. Snyder" <iws@...o.caltech.edu>, netdev@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, mingo@...e.hu, linux-mm@...ck.org,
	akpm@...ux-foundation.org, hpa@...or.com,
	Rusty Russell <rusty@...tcorp.com.au>, s.hetze@...ux-ag.com,
	alacrityvm-devel@...ts.sourceforge.net
Subject: Re: [PATCHv5 3/3] vhost_net: a kernel-level virtio server

On Tue, Sep 15, 2009 at 04:08:23PM -0400, Gregory Haskins wrote:
> No, what I mean is how do you surface multiple ethernet and consoles to
> the guests?  For Ira's case, I think he needs at minimum at least one of
> each, and he mentioned possibly having two unique ethernets at one point.
> 
> His slave boards surface themselves as PCI devices to the x86
> host.  So how do you use that to make multiple vhost-based devices (say
> two virtio-nets, and a virtio-console) communicate across the transport?
> 
> There are multiple ways to do this, but what I am saying is that
> whatever is conceived will start to look eerily like a vbus-connector,
> since this is one of its primary purposes ;)

Can't all this be in userspace?
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