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Re: [Xen-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel
- To: Alex Williamson <alex.williamson@xxxxxxxxxx>, "Tian, Kevin" <kevin.tian@xxxxxxxxx>, "igvt-g@xxxxxxxxxxx" <igvt-g@xxxxxxxxxxx>, "Reddy, Raghuveer" <raghuveer.reddy@xxxxxxxxx>, "White, Michael L" <michael.l.white@xxxxxxxxx>, "Cowperthwaite, David J" <david.j.cowperthwaite@xxxxxxxxx>, "intel-gfx@xxxxxxxxxxxxxxxxxxxxx" <intel-gfx@xxxxxxxxxxxxxxxxxxxxx>, "Li, Susie" <susie.li@xxxxxxxxx>, "Dong, Eddie" <eddie.dong@xxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>, qemu-devel <qemu-devel@xxxxxxxxxx>, "Zhou, Chao" <chao.zhou@xxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, "Zhu, Libo" <libo.zhu@xxxxxxxxx>, "Wang, Hongbo" <hongbo.wang@xxxxxxxxx>
- From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
- Date: Tue, 24 Nov 2015 11:49:39 +0000
- Delivery-date: Tue, 24 Nov 2015 11:51:37 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
- Mail-followup-to: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, "Tian, Kevin" <kevin.tian@xxxxxxxxx>, "igvt-g@xxxxxxxxxxx" <igvt-g@xxxxxxxxxxx>, "Reddy, Raghuveer" <raghuveer.reddy@xxxxxxxxx>, "White, Michael L" <michael.l.white@xxxxxxxxx>, "Cowperthwaite, David J" <david.j.cowperthwaite@xxxxxxxxx>, "intel-gfx@xxxxxxxxxxxxxxxxxxxxx" <intel-gfx@xxxxxxxxxxxxxxxxxxxxx>, "Li, Susie" <susie.li@xxxxxxxxx>, "Dong, Eddie" <eddie.dong@xxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>, qemu-devel <qemu-devel@xxxxxxxxxx>, "Zhou, Chao" <chao.zhou@xxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, "Zhu, Libo" <libo.zhu@xxxxxxxxx>, "Wang, Hongbo" <hongbo.wang@xxxxxxxxx>
On Tue, Nov 24, 2015 at 12:19:18PM +0100, Daniel Vetter wrote:
> Downside: Tracking mapping changes on the guest side won't be any easier.
> This is mostly a problem for integrated gpus, since discrete ones usually
> require contiguous vram for scanout. I think saying "don't do that" is a
> valid option though, i.e. we're assuming that page mappings for a in-use
> scanout range never changes on the guest side. That is true for at least
> all the current linux drivers.
Apart from we already suffer limitations of fixed mappings and have patches
that want to change the page mapping of active scanouts.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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