[Qemu-devel] [PATCH 3/3] intel_iommu: allow IOMMU_NONE typed notifiers

[Peter Xu]

Intel vIOMMU is still lacking of a complete IOMMU notifier mechanism.
Before that is achieved, let's open a door for vhost DMAR support, which
only requires device-IOTLB based cache invalidations (IOMMU_NONE typed
notifies).

Signed-off-by: Peter Xu <address@hidden>
---
 hw/i386/intel_iommu.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index e0d4f23..5a78cb2 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1979,10 +1979,12 @@ static void vtd_iommu_notify_started(MemoryRegion 
*iommu,
 {
     VTDAddressSpace *vtd_as = container_of(iommu, VTDAddressSpace, iommu);
 
-    hw_error("Device at bus %s addr %02x.%d requires iommu notifier which "
-             "is currently not supported by intel-iommu emulation",
-             vtd_as->bus->qbus.name, PCI_SLOT(vtd_as->devfn),
-             PCI_FUNC(vtd_as->devfn));
+    if (flag == IOMMU_RW) {
+        hw_error("Device at bus %s addr %02x.%d requires iommu notifier which "
+                 "is currently not supported by intel-iommu emulation",
+                 vtd_as->bus->qbus.name, PCI_SLOT(vtd_as->devfn),
+                 PCI_FUNC(vtd_as->devfn));
+    }
 }
 
 static const VMStateDescription vtd_vmstate = {
-- 
2.7.4