[Xen-devel] question about ept_set_entry

["Zhang, Chunyu" <zhangcy@xxxxxxxxxxxxxx>]

hi all

in
- p2m-ept.c
  - ept_set_entry

i see code about iommu,
those code  for what?

-----

    if ( rc == 0 && p2m_is_hostp2m(p2m) && need_iommu(d) &&
         need_modify_vtd_table )
    {
        if ( iommu_hap_pt_share )
            iommu_pte_flush(d, gfn, &ept_entry->epte, order, vtd_pte_present);
        else
        {
            if ( iommu_flags )
                for ( i = 0; i < (1 << order); i++ )
                    iommu_map_page(d, gfn + i, mfn_x(mfn) + i, iommu_flags);
            else
                for ( i = 0; i < (1 << order); i++ )
                    iommu_unmap_page(d, gfn + i);
        }
    }


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