Re: [PATCH v2 2/2] qemu: add spice opengl support

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On Mon, Feb 22, 2016 at 09:49:04AM -0500, Marc-André Lureau wrote:
> Hi
> 
> ----- Original Message -----
> > On 19.02.2016 15:30, Marc-André Lureau wrote:
> > > Add Spice graphics gl attribute. qemu 2.6 should have -spice gl=on argument
> > > to
> > > enable opengl rendering context (patches on the ML). This is necessary to
> > > actually enable virgl rendering.
> > > 
> > > Add a qemuxml2argv test for virtio-gpu + spice with virgl.
> > > 
> > > Signed-off-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
> > > ---
> > >  docs/formatdomain.html.in                          |  8 ++++
> > >  docs/schemas/domaincommon.rng                      |  8 ++++
> > >  src/conf/domain_conf.c                             | 26 ++++++++++++-
> > >  src/conf/domain_conf.h                             |  1 +
> > >  src/qemu/qemu_capabilities.c                       |  2 +
> > >  src/qemu/qemu_capabilities.h                       |  1 +
> > >  src/qemu/qemu_command.c                            | 13 +++++++
> > >  tests/qemucapabilitiesdata/caps_2.6.0-1.caps       |  1 +
> > >  tests/qemucapabilitiesdata/caps_2.6.0-1.replies    |  4 ++
> > >  .../qemuxml2argv-video-virtio-gpu-spice-gl.args    | 24 ++++++++++++
> > >  .../qemuxml2argv-video-virtio-gpu-spice-gl.xml     | 38 ++++++++++++++++++
> > >  tests/qemuxml2argvtest.c                           |  6 +++
> > >  .../qemuxml2xmlout-video-virtio-gpu-spice-gl.xml   | 45
> > >  ++++++++++++++++++++++
> > >  tests/qemuxml2xmltest.c                            |  1 +
> > >  14 files changed, 177 insertions(+), 1 deletion(-)
> > >  create mode 100644
> > >  tests/qemuxml2argvdata/qemuxml2argv-video-virtio-gpu-spice-gl.args
> > >  create mode 100644
> > >  tests/qemuxml2argvdata/qemuxml2argv-video-virtio-gpu-spice-gl.xml
> > >  create mode 100644
> > >  tests/qemuxml2xmloutdata/qemuxml2xmlout-video-virtio-gpu-spice-gl.xml
> > 
> > Looking good. ACK to the design. But I'd rather postpone pushing until
> > qemu has released the feature. Otherwise we may end up with different
> > functionality we claim to be supported than qemu does. Yet again.
> 
> How much of a problem is this, since there are caps checks? (assuming
> the interface in qemu doesn't change - I don't think it will).
> 
> We were aiming for fedora 24 if possible, but I see qemu 2.6 is planned
> for 04-26, which is a week after Fedora code complete deadline 04-19.
> It's a bit sad to delay by >2 months given that Spice support is now
> finally ready. Many people are eager to have accelerated VMs in
> virt-manager, I wonder what solution we can find to shorten the delay.

We don't have to wait until QEMU 2.6 is released IMHO.

QEMU hard feature freeze is March 29th http://wiki.qemu.org/Planning/2.6
If we wait until that point, we can be confident enough the QEMU interface
won't be changing before 2.6 GA, and still haved time to get a libvirt
release with this stuff included and into Fedora 24.

Regards,
Daniel
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