[PATCH v4 10/15] intel-iommu: Implement IOMMU_ATTR_MAX_IOVA get_attr() attribute

[Joao Martins]

From: Avihai Horon <avihaih@nvidia.com>

Implement get_attr() method and use the address width property to report
the IOMMU_ATTR_MAX_IOVA attribute.

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
---
 hw/i386/intel_iommu.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index ed2a46e008df..989993e303a6 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -3876,6 +3876,13 @@ static int vtd_iommu_get_attr(IOMMUMemoryRegion 
*iommu_mr,
         *enabled = s->dma_translation;
         break;
     }
+    case IOMMU_ATTR_MAX_IOVA:
+    {
+        hwaddr *max_iova = (hwaddr *)(uintptr_t) data;
+
+        *max_iova = MAKE_64BIT_MASK(0, s->aw_bits);;
+        break;
+    }
     default:
         ret = -EINVAL;
         break;
-- 
2.17.2