From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index 228d02f..d0288a4 100644
--- a/hw/device-assignment.c
+++ b/hw/device-assignment.c
@@ -913,6 +913,12 @@ static int assign_device(AssignedDevice *dev)
#else
dev->features &= ~ASSIGNED_DEVICE_USE_IOMMU_MASK;
#endif
+ if (!(dev->features & ASSIGNED_DEVICE_USE_IOMMU_MASK)) {
+ fprintf(stderr,
+ "WARNING: Assigning a device without IOMMU protection can "
+ "cause host memory corruption if the device issues DMA write "
+ "requests!\n");
+ }
r = kvm_assign_pci_device(kvm_context, &assigned_dev_data);
if (r < 0) {
--
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