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Re: [Xen-devel] [PATCH RFC] tools/libxl: Switch Arm guest type to PVH

On Mon, Jul 02, 2018 at 03:13:38PM +0100, Julien Grall wrote:
> On 06/26/2018 07:49 AM, Roger Pau Monné wrote:
> > On Mon, Jun 25, 2018 at 05:39:12PM +0100, Ian Jackson wrote:
> > > Roger Pau Monné writes ("Re: [PATCH RFC] tools/libxl: Switch Arm guest 
> > > type to PVH"):
> > > > IMO I would remove the 'type' option from xl.cfg (so that it's
> > > > basically ignored) in the ARM case and force it internally to PVH (if
> > > > that's the best route for current ARM guests).
> > > 
> > > What about libvirt users ?  I haven't seen what a libvirt Xen ARM
> > > guest config looks like but we need to meak sure that existing guests
> > > don't break.
> > 
> > For livbirt (or users of libxl library) we could force the type to
> > pvh, regardless of the value set by the client, but I guess that would
> > make adding types later on quite complicated.
> I am fairly confident we will never have PV guest on Arm. So one solution
> would be to alias PV to PVH for Arm. This still give us the liberty to add
> more guest type in the future.
> Any opinions?

Yes, we could make PV synonym to PVH (but don't talk about it, since Xen
Arm never emphasises it guest type).  Whatever new guest type we're
going to add can't be called PV or PVH. I don't think that would be a
big problem -- if you want a different guest type, you definitely want a
different name.


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