[Qemu-devel] [PULL 03/28] intel_iommu, amd_iommu: allow UNMAP notifiers

[Paolo Bonzini]

From: Peter Xu <address@hidden>

x86 vIOMMUs still lack of a complete IOMMU notifier mechanism.
Before that is achieved, let's open a door for vhost DMAR support,
which only requires cache invalidations (UNMAP operations).

Meanwhile, convert hw_error() to error_report() and exit(1), to make
the error messages cleaner and obvious (no CPU registers will be dumped).

Reviewed-by: David Gibson <address@hidden>
Signed-off-by: Peter Xu <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
 hw/i386/amd_iommu.c   | 10 +++++++---
 hw/i386/intel_iommu.c | 12 ++++++++----
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index a868539..023de52 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -21,6 +21,7 @@
  */
 #include "qemu/osdep.h"
 #include "hw/i386/amd_iommu.h"
+#include "qemu/error-report.h"
 #include "trace.h"
 
 /* used AMD-Vi MMIO registers */
@@ -1072,9 +1073,12 @@ static void amdvi_iommu_notify_flag_changed(MemoryRegion 
*iommu,
 {
     AMDVIAddressSpace *as = container_of(iommu, AMDVIAddressSpace, iommu);
 
-    hw_error("device %02x.%02x.%x requires iommu notifier which is not "
-             "currently supported", as->bus_num, PCI_SLOT(as->devfn),
-             PCI_FUNC(as->devfn));
+    if (new & IOMMU_NOTIFIER_MAP) {
+        error_report("device %02x.%02x.%x requires iommu notifier which is not 
"
+                     "currently supported", as->bus_num, PCI_SLOT(as->devfn),
+                     PCI_FUNC(as->devfn));
+        exit(1);
+    }
 }
 
 static void amdvi_init(AMDVIState *s)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index b6cc38c..9f4e64a 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1980,10 +1980,14 @@ static void vtd_iommu_notify_flag_changed(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 (new & IOMMU_NOTIFIER_MAP) {
+        error_report("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));
+        exit(1);
+    }
 }
 
 static const VMStateDescription vtd_vmstate = {
-- 
2.7.4