Re: [Xen-devel] [PATCH v6 10/13] libxl: set nic type to VIF by default

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Jun 26, 2012 at 05:20:35PM +0100, Roger Pau Monne wrote:
> Ian Jackson wrote:
> >Roger Pau Monne writes ("[PATCH v6 10/13] libxl: set nic type to VIF by 
> >default"):
> >>Set the default value for nic interfaces to VIF, since it used to be
> >>IOEMU, even for PV guests.
> >
> >If your renaming of IOEMU to VIF_IOEMU is correct, does this not stop
> >HVM guests getting emulated network interfaces by default ?
> 
> Yes, if you want emulated interfaces with HVM guests you should use
> 'type=ioemu', that's how it has always been right?
> 

With Xen 4.1 you don't have to use "type=ioemu". Emulated interfaces seem to 
work OK without "type=ioemu".
(at least with xm/xend). And if you actually do add "type=ioemu" it will break 
PVHVM for Linux guests..

Quote from: http://wiki.xen.org/wiki/XenLinuxPVonHVMdrivers

"NOTE! If you have "type=ioemu" specified for the "vif"-line, PVHVM drivers 
WILL NOT work! Don't specify "type" parameter for the vif. (with type=ioemu the 
pvhvm nic in the VM will have mac address full of zeroes - and thus won't 
work!). "


-- Pasi


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