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Re: [Qemu-devel] [PATCH] mark nic as trusted

From: Jamie Lokier
Subject: Re: [Qemu-devel] [PATCH] mark nic as trusted
Date: Sat, 10 Jan 2009 02:31:14 +0000
User-agent: Mutt/1.5.13 (2006-08-11)

Anthony Liguori wrote:
> >  Changing the PCI ID will do that for all guests,
> >but is it then feasible for the vmchannel guest admin software to bind
> >a NIC driver to a non-standard PCI ID, on the major OSes?
> >  
> I don't see how changing the PCI ID (I presume you mean vendor/device 
> ID?) would help.

It would stop the OS from loading a NIC driver for it.

Then later, then vmchannel-using guest app would force the OS to load
a NIC driver for the alternative PCI ID.  E.g. by loading a module on
Linux with an alternative name and some module arguments.  It's
probably not feasible without changes to OSes.

> >As the guest OS's TCP is being used, what do you do about IP address
> >space conflicts?
> The user can choose what address is used for the host.

So the vmchannel will need some guest-specific configuration before
the guest-host apps work?  (And I don't mean OS-version-specific, but
specific to individual guest configs?)

-- Jamie

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