From: Nathan Chen <nathanc@nvidia.com>

Set the default value of ATS to auto. The default for ATS support used
to be set to off, but we change it to match what the host IOMMU
properties report. Introduce a new compat for the changed default.

Signed-off-by: Nathan Chen <nathanc@nvidia.com>
---
 hw/arm/smmuv3.c   | 2 +-
 hw/core/machine.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index f3603554e3..f353865187 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -2158,7 +2158,7 @@ static const Property smmuv3_properties[] = {
     DEFINE_PROP_UINT64("msi-gpa", SMMUv3State, msi_gpa, 0),
     /* RIL can be turned off for accel cases */
     DEFINE_PROP_ON_OFF_AUTO("ril", SMMUv3State, ril, ON_OFF_AUTO_ON),
-    DEFINE_PROP_ON_OFF_AUTO("ats", SMMUv3State, ats, ON_OFF_AUTO_OFF),
+    DEFINE_PROP_ON_OFF_AUTO("ats", SMMUv3State, ats, ON_OFF_AUTO_AUTO),
     DEFINE_PROP_OAS_MODE("oas", SMMUv3State, oas, OAS_MODE_44),
     DEFINE_PROP_SSIDSIZE_MODE("ssidsize", SMMUv3State, ssidsize,
                               SSID_SIZE_MODE_0),
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 0aa77a57e9..6796ab63cc 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -37,6 +37,11 @@
 #include "hw/virtio/virtio-iommu.h"
 #include "hw/acpi/generic_event_device.h"
 #include "qemu/audio.h"
+#include "hw/arm/smmuv3.h"
+
+GlobalProperty hw_compat_11_0[] = {
+    { TYPE_ARM_SMMUV3, "ats", "off" },
+};
 
 GlobalProperty hw_compat_10_2[] = {
     { "scsi-block", "migrate-pr", "off" },
-- 
2.43.0