[PATCH QEMU 06/12] spapr: Add "ddw" machine option

[Alexey Kardashevskiy <aik@ozlabs.ru>]

This option will enable Dynamic DMA windows (DDW) support for pseries
machine.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
 hw/ppc/spapr.c | 15 +++++++++++++++
 vl.c           |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index d01978f..fec295b 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -100,6 +100,7 @@ struct sPAPRMachineState {
 
     /*< public >*/
     char *kvm_type;
+    bool ddw_supported;
 };
 
 sPAPREnvironment *spapr;
@@ -1570,10 +1571,24 @@ static void spapr_set_kvm_type(Object *obj, const char *value, Error **errp)
     sm->kvm_type = g_strdup(value);
 }
 
+static bool spapr_machine_get_ddw(Object *obj, Error **errp)
+{
+    sPAPRMachineState *sms = SPAPR_MACHINE(obj);
+    return sms->ddw_supported;
+}
+
+static void spapr_machine_set_ddw(Object *obj, bool value, Error **errp)
+{
+    sPAPRMachineState *sms = SPAPR_MACHINE(obj);
+    sms->ddw_supported = value;
+}
+
 static void spapr_machine_initfn(Object *obj)
 {
     object_property_add_str(obj, "kvm-type",
                             spapr_get_kvm_type, spapr_set_kvm_type, NULL);
+    object_property_add_bool(obj, "ddw", spapr_machine_get_ddw,
+                             spapr_machine_set_ddw, NULL);
 }
 
 static void spapr_machine_class_init(ObjectClass *oc, void *data)
diff --git a/vl.c b/vl.c
index 6e084c2..a615fb1 100644
--- a/vl.c
+++ b/vl.c
@@ -383,6 +383,10 @@ static QemuOptsList qemu_machine_opts = {
             .name = "kvm-type",
             .type = QEMU_OPT_STRING,
             .help = "Specifies the KVM virtualization mode (HV, PR)",
+        }, {
+            .name = "ddw",
+            .type = QEMU_OPT_BOOL,
+            .help = "Enable Dynamic DMA windows support (pseries only)",
         },{
             .name = PC_MACHINE_MAX_RAM_BELOW_4G,
             .type = QEMU_OPT_SIZE,
-- 
2.0.0