Re: [Qemu-devel] [PATCH] libxl: change default QEMU machine to pc-i440fx-1.6

[Stefano Stabellini]

On Wed, 28 May 2014, Paolo Bonzini wrote:
> Il 28/05/2014 18:41, Stefano Stabellini ha scritto:
> > However it would still place xen-platform at slot 3 instead of slot 2 if
> > soundhw is specified. It seems to me that there is not a perfect
> > solution to this problem.  We can either:
> > 
> > - Switch to -machine pc-i440fx-1.6 by default and use consistently the
> > same -machine option no matter the value of xen_platform_pci. Nice, but
> > we break compatibility with existing guests if soundhw is specified.
> > 
> > - Switch to -machine pc-i440fx-1.6 only when xen_platform_pci=0 is
> > specified and keep xenfv if xen_platform_pci=1. We still break
> > compatibility when soundhw is specified together with xen_platform_pci=0.
> 
> - change the implementation of the soundhw option to use -device instead.

Thanks, this sounds like the best option by far.

I noticed that "-soundhw hda" becomes "-device intel-hda".

Given that the VM config file exports a soundhw paramter, we would need
a programmatic way to get the -device command line option from the
soundhw paramter. Is there a way to do that?