Can vfio ioeventfd be used for gvt acceleration?

[Zhe Liu]

thanks! I'll stay tuned :)

2018-04-16 16:59 GMT+08:00 Zhenyu Wang <zhenyuw at linux.intel.com>:

>
> On 2018.04.16 11:43:05 +0800, Zhe Liu wrote:
> > Recently, Alex post a patch in the kvm community to add ioeventfd
> support for
> > vfio.
> >
> > https://lkml.org/lkml/2018/2/6/866
> >
> > This patch adds a shortcut for guest to directly trigger driver events,
> though
> > the message addr and data is preprogrammed.
> >
> > Can this patch be used for gvt? For example, to accelerate MSI-ACK or
> DMA kick?
>
> One possible usage we discussed is for gpu master irq enable which does
> not require
> synchronized emulation, but currently haven't done experiment on that and
> no data on
> how much gain that can bring.
>
> --
> Open Source Technology Center, Intel ltd.
>
> $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
>
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