Re: [PATCH 0/3] Disable vhost device IOTLB is IOMMU is not enabled

[Jason Wang <jasowang@redhat.com>]

在 2021/8/4 上午11:48, Jason Wang 写道:
> Hi:
>
> We currently try to enable device IOTLB when iommu_platform is
> set. This may lead unnecessary trasnsactions between qemu and vhost
> when vIOMMU is not used (which is the typical case for the encrypted
> VM).
>
> So patch tries to use transport specific method to detect the enalbing
> of vIOMMU and enable the device IOTLB only if vIOMMU is enalbed.
>
> Please review.


Hi Michael:

Does this looks good for you? If yes, would you like to pick this series?

Thanks


>
> Thanks
>
> Jason Wang (3):
>    virtio-bus: introduce iommu_enabled()
>    virtio-pci: implement iommu_enabled()
>    vhost: correctly detect the enabling IOMMU
>
>   hw/virtio/vhost.c              |  2 +-
>   hw/virtio/virtio-bus.c         | 14 ++++++++++++++
>   hw/virtio/virtio-pci.c         | 14 ++++++++++++++
>   include/hw/virtio/virtio-bus.h |  4 +++-
>   4 files changed, 32 insertions(+), 2 deletions(-)
>