[dpdk-dev] [PATCH] vfio: add no-iommu support

Burakov, Anatoly anatoly.burakov at intel.com
Mon Dec 21 16:28:23 CET 2015


Hi Ferruh,

> On Mon, Dec 21, 2015 at 03:15:46PM +0000, Burakov, Anatoly wrote:
> > > This is based on patch from Alex Williamson:
> > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/comm
> > > it/?id=03
> > > 3291eccbdb
> > > plus
> > > http://dpdk.org/dev/patchwork/patch/9598/
> > >
> > > This patch is intended to test above patches on DPDK rather than
> > > official patch to DPDK.
> > >
> > > Test result is DPDK successfully run on no-iommu environment.
> > >
> >
> > This is one approach :) I was thinking of another, building some kind of
> more generic support for multiple VFIO drivers. It's a bit more code and
> probably overkill as a solution to this particular problem, but hopefully it'll
> make it easier to add new VFIO drivers down the line (with each driver
> having their own DMA mapping function), should we choose to do so. I'm still
> working on the patch, but if everyone is OK with this approach instead of a
> more general one, that's fine with me.
> >
> Hi Anatoly,
> 
> This patch sent just to show what changes done to test VFIO no-iommu I
> mentioned, and to have a justification for the kernel patch, not sent as a final
> solution in DPDK, sorry for interrupting your work.
> 
> Thanks,
> Ferruh

Ah OK, I misread the part where it said that it is not to be applied as-is. Thanks!

Thanks,
Anatoly


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