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[qemu,v15,03/17] vfio: Check that IOMMU MR translates to system address space

Message ID 1459762426-18440-4-git-send-email-aik@ozlabs.ru (mailing list archive)
State New, archived
Headers show

Commit Message

Alexey Kardashevskiy April 4, 2016, 9:33 a.m. UTC 
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 <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
Changes:
v15:
* added some spaces

v14:
* new to the series
---
 hw/vfio/common.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox

Patch

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 27753d8..23dd738 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