[PATCH v3 10/15] intel-iommu: Implement IOMMU_ATTR_MAX_IOVA get_attr() attribute

From: Joao Martins <joao.m.martins@oracle.com>
To: qemu-devel@nongnu.org
Cc: Alex Williamson <alex.williamson@redhat.com>,
	Cedric Le Goater <clg@redhat.com>,
	Paolo Bonzini <pbonzini@redhat.com>, Peter Xu <peterx@redhat.com>,
	David Hildenbrand <david@redhat.com>,
	Philippe Mathieu-Daude <philmd@linaro.org>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Marcel Apfelbaum <marcel.apfelbaum@gmail.com>,
	Jason Wang <jasowang@redhat.com>,
	Richard Henderson <richard.henderson@linaro.org>,
	Eduardo Habkost <eduardo@habkost.net>,
	Avihai Horon <avihaih@nvidia.com>,
	Jason Gunthorpe <jgg@nvidia.com>,
	Joao Martins <joao.m.martins@oracle.com>
Subject: [PATCH v3 10/15] intel-iommu: Implement IOMMU_ATTR_MAX_IOVA get_attr() attribute
Date: Tue, 30 May 2023 18:59:32 +0100	[thread overview]
Message-ID: <20230530175937.24202-11-joao.m.martins@oracle.com> (raw)
In-Reply-To: <20230530175937.24202-1-joao.m.martins@oracle.com>

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 1906f3a67960..829dd6eadc6c 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 = data;
+
+        *max_iova = (1ULL << s->aw_bits) - 1;
+        break;
+    }
     default:
         ret = -EINVAL;
         break;
-- 
2.39.3


