Re: [Qemu-devel] [PATCH v7 17/17] intel_iommu: enable vfio devices

[Jason Wang <jasowang@redhat.com>]

On 2017年02月07日 16:28, Peter Xu wrote:
> This patch is based on Aviv Ben-David (<bd.aviv@gmail.com>)'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.
>
> And, since we already have vhost DMAR support via device-iotlb, a
> natural benefit that this patch brings is that vt-d enabled vhost can
> live even without ATS capability now. Though more tests are needed.

Michael, if you want to apply this series, I would propose a better 
title for this patch e.g "cowork with remote IOMMU/IOTLB"

Thanks

>
> Reviewed-by: Jason Wang <jasowang@redhat.com>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>   hw/i386/intel_iommu.c          | 191 ++++++++++++++++++++++++++++++++++++++---
>   hw/i386/intel_iommu_internal.h |   1 +
>   hw/i386/trace-events           |   1 +
>   include/hw/i386/intel_iommu.h  |   8 ++
>   4 files changed, 188 insertions(+), 13 deletions(-)

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