[vfio-users] hypervisor enlightenments in upstream qemu

[Eddie Yen]

I used to pass-through my GTX980 into Windows 10 guest with this command:

-cpu host,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,kvm=off,hv_vendor_id=AKVM

To verify Hyper-V functions works or not, the easiest way is running games
or benchmarks, especially online games or others that heavy CPU usage.
And it's easily got feeling on FPS, score and UX (User Experience) between
Hyper-V and non-Hyper-V.

2016-03-06 4:22 GMT+08:00 Doug Applegate <doug.applegate at gmail.com>:

> Hello,
>
> I finally got around to this and it seems to work on my Windows 10
> installation (didn't have to do a fresh install). Passing through
> nvidia gtx 970.  My question is, how can we verify enlightenments
> working on Windows 10? Also, is there any benefit do this?
>
> Doug
>
> On Mon, Jan 11, 2016 at 10:41 AM, Doug Applegate
> <doug.applegate at gmail.com> wrote:
> > Cool, thanks for your quick response. I'll give it a try on my Windows
> > 10 install.
> >
> > On Mon, Jan 11, 2016 at 10:38 AM, Alexander Petrenz <petrenz.a at gmail.com>
> wrote:
> >> Hi Doug,
> >>
> >> I guess this is part of QEMU 2.5 by now. On the command line you can
> use it
> >> as followes:
> >>
> >> -cpu host,hv_time,hv_vendor_id=KeenlyKVM
> >>
> >> I don´t know if this is also in libvirt already. But I can't tell if you
> >> have any advantage of this right away. I tried this along with hv_time
> on my
> >> existing Windows 7 VM, and it wasn't able to start because of hv_time.
> So
> >> maybe you need to do a fresh install at least - but I'm not sure.
> >>
> >> PS: the patch is located here:
> >> https://www.mail-archive.com/qemu-devel@nongnu.org/msg328958.html
> >>
> >> Alex
> >>
> >> On Mon, Jan 11, 2016 at 6:31 PM, Doug Applegate <
> doug.applegate at gmail.com>
> >> wrote:
> >>>
> >>> Hello,
> >>>
> >>> I recall someone mentioning that Alex had a patch to QEMU that avoids
> >>> the need for disabling hypervisor enlightenments if you were using
> >>> nVidia graphic cards.
> >>>
> >>> Is this in upstream QEMU, if it is has it been released? Or do I need
> >>> to patch QEMU first?  Where exactly is this patch?
> >>>
> >>> Thanks!
> >>>
> >>> _______________________________________________
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> >>> vfio-users at redhat.com
> >>> https://www.redhat.com/mailman/listinfo/vfio-users
> >>
> >>
>
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