Re: [PATCH 3/4] qemu: Generate 'xres' and 'yres' for qxl device.

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On Mon, Aug 05, 2019 at 12:30:48PM +0200, Ján Tomko wrote:
> On Mon, Aug 05, 2019 at 08:43:14AM +0200, Erik Skultety wrote:
> > On Sun, Aug 04, 2019 at 10:21:20PM -0300, jcfaracco@xxxxxxxxx wrote:
> > > From: Julio Faracco <jcfaracco@xxxxxxxxx>
> > >
> > > Now, QEMU command line can define 'xres' and 'yres' if XML contains both
> > > properties from qxl model.
> > >
> > > Signed-off-by: Julio Faracco <jcfaracco@xxxxxxxxx>
> > > ---
> > >  src/qemu/qemu_command.c | 4 ++++
> > >  1 file changed, 4 insertions(+)
> > >
> > > diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> > > index fee51158a9..82430e7e98 100644
> > > --- a/src/qemu/qemu_command.c
> > > +++ b/src/qemu/qemu_command.c
> > > @@ -4713,6 +4713,10 @@ qemuBuildDeviceVideoStr(const virDomainDef *def,
> > >              if (video->heads)
> > >                  virBufferAsprintf(&buf, ",max_outputs=%u", video->heads);
> > >          }
> > > +
> > > +        if (video->xres && video->yres)
> > > +            virBufferAsprintf(&buf, ",xres=%u,yres=%u", video->xres, video->yres);
> >
> > Capabilities changes are needed. The support for specifying video resolution
> > was added in qemu 2.10.0, libvirt supports as old as 1.5.0. Unfortunately,
> > device properties listing isn't QAPIfied yet, so we can't probe this properly.
> >
>
> Not sure how QAPI comes into play here, but we already do probe for
> qxl's other properties and git grep "xres" tests does show hits from
> replies files from 2.10.0 on.

I stand corrected, I must have overlooked, in which case, there shouldn't
really be any problem in querying the property properly.

Erik

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