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

[Anthony Liguori]

Jamie Lokier wrote:
> 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.
>   

It isn't.  Drivers don't work that way.

Regards,

Anthony Liguori

> > > 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
>
>
>