Re: [Qemu-devel] [RFC PATCH] vl: only display available accelerators

["Daniel P. Berrange" <berrange@redhat.com>]

On Mon, Oct 30, 2017 at 09:20:29AM +0100, Eduardo Habkost wrote:
> On Mon, Oct 30, 2017 at 01:00:56AM -0300, Philippe Mathieu-Daudé wrote:
> > examples configuring with '--enable-kvm --disable-tcg'
> > 
> > - before
> > 
> >   $ qemu-system-x86_64 -accel help
> >   Possible accelerators: kvm, xen, hax, tcg
> > 
> >   $ qemu-system-x86_64 -accel tcg
> >   qemu-system-x86_64: -machine accel=tcg: No accelerator found
> > 
> >   # qemu-system-x86_64 -accel hax
> >   qemu-system-x86_64: -machine accel=hax: No accelerator found
> > 
> >   # qemu-system-x86_64 -accel xen
> >   xencall: error: Could not obtain handle on privileged command interface: No such file or directory
> >   xen be core: xen be core: can't open xen interface
> >   can't open xen interface
> >   qemu-system-x86_64: failed to initialize Xen: Operation not permitted
> > 
> > - after
> > 
> >   $ qemu-system-x86_64 -accel help
> >   Possible accelerators: kvm
> > 
> > Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> > ---
> > RFC because:
> >     - I don't think this is the nicest way, too much #ifdef'fery in main()
> 
> I suggest using object_class_get_list(TYPE_ACCEL, false).

And check the result of the available() method on the returned classes
too, to filter the results.


Regards,
Daniel
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