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[Qemu-ppc] [PATCH qemu v16 05/19] vfio: Check that IOMMU MR translates t

From: Alexey Kardashevskiy
Subject: [Qemu-ppc] [PATCH qemu v16 05/19] vfio: Check that IOMMU MR translates to system address space
Date: Wed, 4 May 2016 16:52:17 +1000

At the moment IOMMU MR only translate to the system memory.
However if some new code changes this, we will need clear indication why
it is not working so here is the check.

Signed-off-by: Alexey Kardashevskiy <address@hidden>
Reviewed-by: David Gibson <address@hidden>
* added some spaces

* new to the series
 hw/vfio/common.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index f32cc49..6d23d0f 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -266,6 +266,12 @@ static void vfio_iommu_map_notify(Notifier *n, void *data)
     trace_vfio_iommu_map_notify(iova, iova + iotlb->addr_mask);
+    if (iotlb->target_as != &address_space_memory) {
+        error_report("Wrong target AS \"%s\", only system memory is allowed",
+                     iotlb->target_as->name ? iotlb->target_as->name : "none");
+        return;
+    }
      * The IOMMU TLB entry we have just covers translation through
      * this IOMMU to its immediate target.  We need to translate

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