RE: [RFC PATCH v3 2/4] vfio: Introduce vGPU display irq type

[Zhang, Tina]

> -----Original Message-----
> From: intel-gvt-dev [mailto:intel-gvt-dev-bounces@xxxxxxxxxxxxxxxxxxxxx] On
> Behalf Of Gerd Hoffmann
> Sent: Thursday, June 27, 2019 2:21 PM
> To: Zhang, Tina <tina.zhang@xxxxxxxxx>
> Cc: Tian, Kevin <kevin.tian@xxxxxxxxx>; kvm@xxxxxxxxxxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx; zhenyuw@xxxxxxxxxxxxxxx; Yuan, Hang
> <hang.yuan@xxxxxxxxx>; alex.williamson@xxxxxxxxxx; Lv, Zhiyuan
> <zhiyuan.lv@xxxxxxxxx>; intel-gvt-dev@xxxxxxxxxxxxxxxxxxxxx; Wang, Zhi A
> <zhi.a.wang@xxxxxxxxx>
> Subject: Re: [RFC PATCH v3 2/4] vfio: Introduce vGPU display irq type
> 
> On Thu, Jun 27, 2019 at 11:38:00AM +0800, Tina Zhang wrote:
> > Introduce vGPU specific irq type VFIO_IRQ_TYPE_GFX, and
> > VFIO_IRQ_SUBTYPE_GFX_DISPLAY_IRQ as the subtype for vGPU display
> >
> > Signed-off-by: Tina Zhang <tina.zhang@xxxxxxxxx>
> > ---
> >  include/uapi/linux/vfio.h | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
> > index 600784acc4ac..c3e9c821a5cb 100644
> > --- a/include/uapi/linux/vfio.h
> > +++ b/include/uapi/linux/vfio.h
> > @@ -465,6 +465,9 @@ struct vfio_irq_info_cap_type {
> >  	__u32 subtype;  /* type specific */
> >  };
> >
> > +#define VFIO_IRQ_TYPE_GFX				(1)
> > +#define VFIO_IRQ_SUBTYPE_GFX_DISPLAY_IRQ		(1)
> 
> VFIO_IRQ_TYPE_GFX_VBLANK ?
VFIO_IRQ_SUBTYPE_GFX_DISPLAY_IRQ is proposed to cover all the display related events. In this version, we only use VFIO_IRQ_SUBTYPE_GFX_DISPLAY_IRQ to deliver vblank event. However, we might still want to reserve seat for other display event, like page flip event.
Thanks.

BR,
Tina
> 
> cheers,
>   Gerd
> 
> _______________________________________________
> intel-gvt-dev mailing list
> intel-gvt-dev@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/intel-gvt-dev