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

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Date:   Thu, 27 Jun 2019 09:11:40 +0000
From:   "Zhang, Tina" <tina.zhang@...el.com>
To:     Gerd Hoffmann <kraxel@...hat.com>
CC:     "Tian, Kevin" <kevin.tian@...el.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "zhenyuw@...ux.intel.com" <zhenyuw@...ux.intel.com>,
        "Yuan, Hang" <hang.yuan@...el.com>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "Lv, Zhiyuan" <zhiyuan.lv@...el.com>,
        "intel-gvt-dev@...ts.freedesktop.org" 
        <intel-gvt-dev@...ts.freedesktop.org>,
        "Wang, Zhi A" <zhi.a.wang@...el.com>
Subject: RE: [RFC PATCH v3 2/4] vfio: Introduce vGPU display irq type


> -----Original Message-----
> From: intel-gvt-dev [mailto:intel-gvt-dev-bounces@...ts.freedesktop.org] On
> Behalf Of Gerd Hoffmann
> Sent: Thursday, June 27, 2019 2:21 PM
> To: Zhang, Tina <tina.zhang@...el.com>
> Cc: Tian, Kevin <kevin.tian@...el.com>; kvm@...r.kernel.org; linux-
> kernel@...r.kernel.org; zhenyuw@...ux.intel.com; Yuan, Hang
> <hang.yuan@...el.com>; alex.williamson@...hat.com; Lv, Zhiyuan
> <zhiyuan.lv@...el.com>; intel-gvt-dev@...ts.freedesktop.org; Wang, Zhi A
> <zhi.a.wang@...el.com>
> 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@...el.com>
> > ---
> >  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
> 
> _______________________________________________
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> intel-gvt-dev@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gvt-dev

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