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Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf

From Gerd Hoffmann <kraxel@redhat.com>
Newsgroups linux.kernel
Subject Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf
Date 2017-05-19 11:00 +0200
Message-ID <tILVo-84l-29@gated-at.bofh.it> (permalink)
References (16 earlier) <tIeZs-8x-27@gated-at.bofh.it> <tIiTn-2In-7@gated-at.bofh.it> <tIv4d-47X-3@gated-at.bofh.it> <tIL8Z-7Kt-1@gated-at.bofh.it> <tILiG-7O7-25@gated-at.bofh.it>
Organization linux.* mail to news gateway

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  Hi,

> >We could also do it the other way around:  Instead of having the kernel returning
> 
> >the plane description userspace could pass it in, and the kernel throws -EINVAL in
> 
> >case it doesn't match due to things having changed meanwhile.
> 
> Or just return a dmabuf  based on the current plane ?

If gvt is able to hand out dma-bufs for inactive planes, then yes, we
can do this.  Have one ioctl where we pass in the plane id, get back a
plane description struct, and another where we pass in the plane
description struct and get back a dma-buf fd.

cheers,
  Gerd

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Thread

RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf "Chen, Xiaoguang" <xiaoguang.chen@intel.com> - 2017-05-12 04:20 +0200
  Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Alex Williamson <alex.williamson@redhat.com> - 2017-05-12 05:00 +0200
    RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf "Chen, Xiaoguang" <xiaoguang.chen@intel.com> - 2017-05-12 06:00 +0200
    Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Gerd Hoffmann <kraxel@redhat.com> - 2017-05-12 11:20 +0200
      Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Alex Williamson <alex.williamson@redhat.com> - 2017-05-12 18:50 +0200
        RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf "Chen, Xiaoguang" <xiaoguang.chen@intel.com> - 2017-05-15 05:40 +0200
          Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Alex Williamson <alex.williamson@redhat.com> - 2017-05-15 19:50 +0200
            RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf "Chen, Xiaoguang" <xiaoguang.chen@intel.com> - 2017-05-16 12:20 +0200
              Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Alex Williamson <alex.williamson@redhat.com> - 2017-05-17 23:50 +0200
                RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf "Chen, Xiaoguang" <xiaoguang.chen@intel.com> - 2017-05-18 04:00 +0200
                Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Alex Williamson <alex.williamson@redhat.com> - 2017-05-18 17:00 +0200
                RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf "Chen, Xiaoguang" <xiaoguang.chen@intel.com> - 2017-05-19 08:30 +0200
                Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Gerd Hoffmann <kraxel@redhat.com> - 2017-05-19 10:10 +0200
                RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf "Chen, Xiaoguang" <xiaoguang.chen@intel.com> - 2017-05-19 10:20 +0200
                Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Gerd Hoffmann <kraxel@redhat.com> - 2017-05-19 11:00 +0200
                RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf "Chen, Xiaoguang" <xiaoguang.chen@intel.com> - 2017-05-19 11:20 +0200
                Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Gerd Hoffmann <kraxel@redhat.com> - 2017-05-19 13:00 +0200
                Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Gerd Hoffmann <kraxel@redhat.com> - 2017-05-18 08:30 +0200

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