Re: [Qemu-devel] [PATCH RFC v4 18/20] intel_iommu: enable vfio devices

[Jason Wang]

On 2017年01月23日 10:01, Jason Wang wrote:
> On 2017年01月20日 21:08, Peter Xu wrote:
> > This patch is based on Aviv Ben-David (<address@hidden>)'s patch
> > upstream:
> >
> >    "IOMMU: enable intel_iommu map and unmap notifiers"
> > https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01453.html
> >
> > However I removed/fixed some content, and added my own codes.
> >
> > Instead of translate() every page for iotlb invalidations (which is
> > slower), we walk the pages when needed and notify in a hook function.
> >
> > This patch enables vfio devices for VT-d emulation.
> >
> > Signed-off-by: Peter Xu<address@hidden>
> > ---
> >   hw/i386/intel_iommu.c         | 66 
> > +++++++++++++++++++++++++++++++++++++------
> >   include/hw/i386/intel_iommu.h |  8 ++++++
> >   2 files changed, 65 insertions(+), 9 deletions(-)
>
> A good side effect of this patch is that it makes vhost device IOTLB 
> works without ATS (though may be slow). We probably need a better 
> title :)

Probably something like "remote IOMMU/IOTLB" support.

Thanks