Re: [Qemu-devel] [PATCH v2 2/3] vfio/display: add xres + yres properties

[Gerd Hoffmann]

  Hi,

> > +    DEFINE_PROP_UINT32("xres", VFIOPCIDevice, display_xres, 0),
> > +    DEFINE_PROP_UINT32("yres", VFIOPCIDevice, display_yres, 0),
> 
> This is actually quite fun, I started my VM with arbitrary numbers and
> the Windows GUI honored it every time.  Probably very useful for
> playing with odd screen sizes.  I also tried to break it using
> 1000000x1000000, but the display came up as 1920x1200, the maximum
> resolution GVT-g supports for this type.  I don't see that QEMU is
> bounding this though, do we depend on the mdev device to ignore it if
> we pass values it cannot support?

There is a check in vfio_display_edid_update().

cheers,
  Gerd