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Re: [Xen-devel] Re: [Qemu-devel] [PATCH 05/13] xen: groundwork for xen support

On Tue, Aug 26, 2008 at 04:49:05PM +0200, Gerd Hoffmann wrote:
> Daniel P. Berrange wrote:
> > On Tue, Aug 26, 2008 at 04:31:49PM +0200, Gerd Hoffmann wrote:
> >> Daniel P. Berrange wrote:
> >>> I'll try to enumerate the scenarios here...
> >>>
> >>>  On KVM, using Xenner + shell        : No special args
> >>>  On KVM, using Xenner + libvirtd     : -xen-create <domid> 
> >> This is "xen emulation" and (according to long term plan plan) doesn't
> >> require kvm but should work with qemu emulating things too.  This means
> >> it doesn't depend on kvm, you can do that with xen underneath too.  This
> >> is what the -xen-emulate switch is good for.
> > 
> > Wouldn't the non-KVM case already be dealt with by the -no-kvm command 
> > line arg to QEMU ? 
> But when running on xen we want being able to qemu tell it should *not*
> use the xen hypervisor but emulate things, thus -xen-emulate.

Oh, i see what you mean. Existing naming practice would suggest naming
it -no-xenhv or just -no-xen

All these '-no-XXX' args are getting a little silly though. I'd rather
tell QEMU what I *do* want, than what I don't want. A generic arg
'-accelerator none|xen|kvm|kqemu' might be worth considering in the future.
That can be a separate discussion from these patches though - we should
just follow the -no-XXX naming for now to minimize diffs

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