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Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/7] xen: groundwork for xen sup

From: Gerd Hoffmann
Subject: Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/7] xen: groundwork for xen support
Date: Tue, 29 Jul 2008 09:38:01 +0200
User-agent: Thunderbird (X11/20080501)

Samuel Thibault wrote:
> Anthony Liguori, le Mon 28 Jul 2008 09:04:54 -0500, a écrit :
>>> +/* xen_machine.c */
>>> +extern QEMUMachine xenpv_machine;
>>> +extern QEMUMachine xenfv_machine;
>> Why does xenfv need its own machine type?
> IIRC that's at least because it adds its own Xen platform -specific PCI card.

That is only one tiny bit of the differences between paravirtual and
fully virtualized machines, there is plenty more.  The question is
whenever qemu should try figure itself whenever the virtual machine it
serves is fully virtualized or whenever we'll explicitly tell it qemu.

I think it is better to explicitly tell qemu whenever we want create a
paravirtual or a full virtualized machine.  First, because this is how
it is handled right now in xen (via -M [ xenpv | xenfv ] ), and second,
it leaves the door open to have qemu also create the domain.



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