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Date: Fri, 13 Nov 2015 04:56:49 -0500 (EST)
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 09/12] vl: Replace DT_NOGRAPHIC with
	MachineState field
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To: Eduardo Habkost <ehabkost@redhat.com>
Cc: Blue Swirl <blauwirbel@gmail.com>, Michael Walle <michael@walle.cc>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, qemu-devel@nongnu.org

> > Can you add a QOM property too, so that "-machine graphics=yes|no" can
> > be used?
> 
> I can, but I would like to clarify the expected semantics. With
> the -machine option, we would have:
> 
> * -display, which affects only the display UI.
> * -nographic, which affects:
>   * The display UI;
>   * Hardware emulation;
>   * serial/paralllel/virtioconsole output redirection.
> * -machine graphics=no, which would affect only hardware
>   emulation.
> 
> Is that correct?

Yes.  In the case of PC, it might also add "-device sga" unless -nodefaults
(or "-device sga") is specified.  But that's left for later.

Paolo