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Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a
From: |
Stefano Stabellini |
Subject: |
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel |
Date: |
Thu, 19 Nov 2015 16:12:06 +0000 |
User-agent: |
Alpine 2.02 (DEB 1266 2009-07-14) |
On Thu, 19 Nov 2015, Paolo Bonzini wrote:
> On 19/11/2015 16:32, Stefano Stabellini wrote:
> > > In addition to Kevin's replies, I have a high-level question: can VFIO
> > > be used by QEMU for both KVM and Xen?
> >
> > No. VFIO cannot be used with Xen today. When running on Xen, the IOMMU
> > is owned by Xen.
>
> I don't think QEMU command line compatibility between KVM and Xen should
> be a design goal for GVT-g.
Right, I agree.
In fact I don't want my comment to be taken as "VFIO should not be used
at all". I only meant to reply to the question. I think it is unlikely
to be the best path for Xen, but it could very well be the right answer
for KVM.
> Nevertheless, it shouldn't be a problem to use a "virtual" VFIO (which
> doesn't need the IOMMU, because it uses the MMU in the physical GPU)
> even under Xen.
That could be true, but I would expect some extra work to be needed to
make use of VFIO on Xen. Also it might cause some duplication of
functionalities with the current Xen passthrough code base.
- Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, (continued)
- Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Gerd Hoffmann, 2015/11/19
- Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Tian, Kevin, 2015/11/20
- Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Gerd Hoffmann, 2015/11/20
- Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Tian, Kevin, 2015/11/20
- Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Zhiyuan Lv, 2015/11/20
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Jike Song, 2015/11/19
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Alex Williamson, 2015/11/19
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Jike Song, 2015/11/19
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Alex Williamson, 2015/11/19
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Jike Song, 2015/11/20
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Tian, Kevin, 2015/11/20
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Alex Williamson, 2015/11/20
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Jike Song, 2015/11/22
Re: [Qemu-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel, Alex Williamson, 2015/11/19