Re: [Qemu-devel] [PATCH] xen: make xen-platform a default device

[Fabio Fantoni <fabio.fantoni@m2r.biz>]

> One issue is that -M pc didn't always work with Xen. Now it does and we
> are already relying on it in libxl since
> 2bc047635b51abd41c917aa2b813211ee0de2c38. It is safe because all QEMU
> releases from 1.6 onward work well with Xen and -M pc. Older QEMU
> releases are considered ancient and unmaintained. This is what I was
> referring to in my last reply. I really meant "we should move away from
> xenfv and use a pc.* machine that does not create xen-platform by
> default".
>
> As you say the other issue is the version of the pc machine, especially
> in relation to save/restore. However since:
>
> commit 2bc047635b51abd41c917aa2b813211ee0de2c38
> Author: Anthony PERARD <address@hidden>
> Date:   Wed Nov 27 18:21:34 2013 +0000
>
>      libxl: Handle xen_platform_pci=0 case with qemu-xen.
>
> we are simply calling QEMU with -M pc if xen_platform_pci=0. I think we
> should change that too and backport the patch to 4.4. pc-i440fx-1.6
> seems like a good choice to me.

Use "-M pc" as default seems a good idea.
Use specific version maybe too.
This way the base hardware should stay the same even if updating qemu, 
is right? If yes, this should also solve possible problem like windows 
reactivation request for different hardware, right?
How about create also xl parameter to select the "pc" model?

Thanks for any reply and sorry for my bad english.