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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 02 Feb 2016 09:00:43 +0100
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Subject: Re: [Qemu-devel] [RFC PATCH v1 1/1] vGPU core driver : to provide
 common interface for vGPU.
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To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: "Ruan, Shuai" <shuai.ruan@intel.com>, "Song, Jike" <jike.song@intel.com>, Neo Jia <cjia@nvidia.com>, "kvm@vger.kernel.org" <kvm@vger.kernel.org>, Alex Williamson <alex.williamson@redhat.com>, qemu-devel <qemu-devel@nongnu.org>, Kirti Wankhede <kwankhede@nvidia.com>, "Lv,
	Zhiyuan" <zhiyuan.lv@intel.com>, Paolo Bonzini <pbonzini@redhat.com>

  Hi,

> And for UUID, I remember Alex had a concern on using it in kernel.=20
> Honestly speaking I don't have a good idea here. In Xen side there is a V=
M ID
> which can be easily used as the index. But for KVM, what would be the bes=
t
> identifier to associate with a VM?

The vgpu code doesn't need to associate the vgpu device with a vm in the
first place.  You get all guest address space information from qemu, via
vfio iommu interface.

When qemu does't use kvm (tcg mode), things should still work fine.
Using vfio-based vgpu devices with non-qemu apps (some kind of test
suite for example) should work fine too.

cheers,
  Gerd