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Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation

From Gerd Hoffmann <kraxel@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation
Date 2017-07-17 13:10 +0200
Message-ID <u4c4y-4fj-5@gated-at.bofh.it> (permalink)
References (6 earlier) <u2pfA-8io-27@gated-at.bofh.it> <u2XKi-4Ps-11@gated-at.bofh.it> <u35Rv-20X-5@gated-at.bofh.it> <u37zY-3en-13@gated-at.bofh.it> <u37JH-3iP-77@gated-at.bofh.it>
Organization linux.* mail to news gateway

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  Hi,

> No need of flag here. If vGPU driver is not loaded in the guest,
> there
> is no surface being managed by vGPU, in that case this size will be
> zero.

Ok, we certainly have the same situation with intel.  When the guest
driver is not loaded (yet) there is no valid surface.

We should cleanly define what the ioctl should do in that case, so all
drivers behave the same way.

I'd suggest that all fields defining the surface (drm_format, width,
height, stride, size) should be set to zero in that case.

cheers,
  Gerd

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Thread

[PATCH v10] vfio: ABI for mdev display dma-buf operation Tina Zhang <tina.zhang@intel.com> - 2017-07-06 00:40 +0200
  Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Kirti Wankhede <kwankhede@nvidia.com> - 2017-07-06 16:10 +0200
    Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Gerd Hoffmann <kraxel@redhat.com> - 2017-07-11 08:20 +0200
      Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Daniel Vetter <daniel@ffwll.ch> - 2017-07-11 11:20 +0200
        RE: [PATCH v10] vfio: ABI for mdev display dma-buf operation "Zhang, Tina" <tina.zhang@intel.com> - 2017-07-12 04:40 +0200
          Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Daniel Vetter <daniel@ffwll.ch> - 2017-07-12 09:50 +0200
            Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Kirti Wankhede <kwankhede@nvidia.com> - 2017-07-12 14:50 +0200
              RE: [PATCH v10] vfio: ABI for mdev display dma-buf operation "Zhang, Tina" <tina.zhang@intel.com> - 2017-07-14 03:40 +0200
                Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Kirti Wankhede <kwankhede@nvidia.com> - 2017-07-14 12:20 +0200
                Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Gerd Hoffmann <kraxel@redhat.com> - 2017-07-14 14:10 +0200
                Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Kirti Wankhede <kwankhede@nvidia.com> - 2017-07-14 14:20 +0200
                Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Gerd Hoffmann <kraxel@redhat.com> - 2017-07-17 13:10 +0200
              Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Gerd Hoffmann <kraxel@redhat.com> - 2017-07-14 12:10 +0200
                Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Kirti Wankhede <kwankhede@nvidia.com> - 2017-07-14 12:20 +0200
                Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Gerd Hoffmann <kraxel@redhat.com> - 2017-07-14 14:20 +0200
        Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Zhenyu Wang <zhenyuw@linux.intel.com> - 2017-07-12 05:30 +0200
    RE: [PATCH v10] vfio: ABI for mdev display dma-buf operation "Zhang, Tina" <tina.zhang@intel.com> - 2017-07-12 04:30 +0200
  Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Gerd Hoffmann <kraxel@redhat.com> - 2017-07-11 08:10 +0200
    RE: [PATCH v10] vfio: ABI for mdev display dma-buf operation "Zhang, Tina" <tina.zhang@intel.com> - 2017-07-12 04:50 +0200
  Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation Daniel Vetter <daniel@ffwll.ch> - 2017-07-11 11:20 +0200
    RE: [PATCH v10] vfio: ABI for mdev display dma-buf operation "Zhang, Tina" <tina.zhang@intel.com> - 2017-07-12 05:20 +0200

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