Re: [PATCH v9 4/9] virtio-iommu: set supported page size mask

[Auger Eric <eric.auger@redhat.com>]

Hi Bharat,

On 3/23/20 9:46 AM, Bharat Bhushan wrote:
> Add optional interface to set page size mask.
> Currently this is set global configuration and not
> per endpoint.
This allows to override the page size mask per end-point?
> 
> Signed-off-by: Bharat Bhushan <bbhushan2@marvell.com>
> ---
>  include/hw/virtio/virtio-iommu.h | 1 +
>  hw/virtio/virtio-iommu.c         | 9 +++++++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h
> index 6f67f1020a..4efa09610a 100644
> --- a/include/hw/virtio/virtio-iommu.h
> +++ b/include/hw/virtio/virtio-iommu.h
> @@ -35,6 +35,7 @@ typedef struct IOMMUDevice {
>      void         *viommu;
>      PCIBus       *bus;
>      int           devfn;
> +    uint64_t      page_size_mask;
>      IOMMUMemoryRegion  iommu_mr;
>      AddressSpace  as;
>  } IOMMUDevice;
> diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
> index 4cee8083bc..a28818202c 100644
> --- a/hw/virtio/virtio-iommu.c
> +++ b/hw/virtio/virtio-iommu.c
> @@ -650,6 +650,14 @@ static gint int_cmp(gconstpointer a, gconstpointer b, gpointer user_data)
>      return (ua > ub) - (ua < ub);
>  }
>  
> +static void virtio_iommu_set_page_size_mask(IOMMUMemoryRegion *mr,
> +                                            uint64_t page_size_mask)
> +{
> +    IOMMUDevice *sdev = container_of(mr, IOMMUDevice, iommu_mr);
> +
> +    sdev->page_size_mask = page_size_mask;
> +}
> +
>  static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
>  {
>      VirtIODevice *vdev = VIRTIO_DEVICE(dev);
> @@ -865,6 +873,7 @@ static void virtio_iommu_memory_region_class_init(ObjectClass *klass,
>      IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
>  
>      imrc->translate = virtio_iommu_translate;
> +    imrc->iommu_set_page_size_mask = virtio_iommu_set_page_size_mask;
>  }
>  
>  static const TypeInfo virtio_iommu_info = {
> 
Thanks

Eric