[Xen-devel] Re: [Qemu-devel] [PATCH RFC V3 03/12] xen: Introduce --enable-xen command options.

[Anthony PERARD <anthony@xxxxxxxxxx>]

On Fri, 17 Sep 2010, Alexander Graf wrote:

> On 17.09.2010, at 13:14, Anthony.Perard@xxxxxxxxxx wrote:
>
> > diff --git a/qemu-options.hx b/qemu-options.hx
> > index a0b5ae9..457ca32 100644
> > --- a/qemu-options.hx
> > +++ b/qemu-options.hx
> > @@ -1904,6 +1904,15 @@ Enable KVM full virtualization support. This option 
> > is only available
> > if KVM support is enabled when compiling.
> > ETEXI
> >
> > +DEF("enable-xen", 0, QEMU_OPTION_enable_xen, \
> > +    "-enable-xen     enable Xen full virtualization support\n", 
> > QEMU_ARCH_ALL)
>
> This is probably a good point in time to switch to something a bit more 
> sophisticated. I was thinking of
>
>   qemu -accel xen,kvm,tcg
>
> which would first try to enable xen support, then kvm support and fall back 
> to tcg if none is available. The default would be pretty much the line above.
>
> That way we could finally get rid of all those -enable-kvm and 
> -enable-whatever switches. We would still need to keep backwards compat for 
> -enable-kvm by mapping it to "-accel kvm" internally. But in the long run an 
> -accel parameter just makes so much more sense.

Ok, I will add this option, but the default one will be -accel tcg
because qemu with xen can't run without a tool stack at this moment and
the default behavior of qemu with kvm is to run with tcg.

Thanks,

-- 
Anthony PERARD

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