Re: [Xen-devel] [PATCH 11/13] libxl: set nic type to VIF by default

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2012-05-29 at 15:40 +0100, Ian Jackson wrote:
> Roger Pau Monne writes ("Re: [PATCH 11/13] libxl: set nic type to VIF by 
> default"):
> > Ian Jackson wrote:
> > > Roger Pau Monne writes ("[PATCH 11/13] libxl: set nic type to VIF by 
> > > default"):
> > >> -        nic->nictype = LIBXL_NIC_TYPE_IOEMU;
> > >> +        nic->nictype = LIBXL_NIC_TYPE_VIF;
> > >
> > > But doesn't this set the default type to VIF even for HVM guests ?
> > 
> > Shouldn't HVM guests use the "ioemu" parameter if they want an emulated 
> > card? If no parameter is provided then the default type should be VIF, 
> > because there's no other way to specifically set the type to VIF.
> 
> Sorry.  I seem to have failed to reply to this.
> 
> I'm a bit confused about all this, I confess.  What does xend do ?
> 
> ATM it seems that this change would mean that a guest config file
> specified in the most obvious way wouldn't get an emulated nic at
> all.  That can't be right, can it ?

It's confusingly named.

IOEMU -> emulated only on HVM, meaningless on PV.
VIF   -> both emulated and PV (on HVM) or just PV (on PV)

So a default of "VIF" is what you normally want.

Ian.


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