7 files changed, 29 insertions, 25 deletions
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 19bec3fe59..ebd5f306e4 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1874,12 +1874,8 @@ DEFINE_VIRT_MACHINE_AS_LATEST(4, 0)
 
 static void virt_machine_3_1_options(MachineClass *mc)
 {
-    static GlobalProperty compat[] = {
-        HW_COMPAT_3_1
-    };
-
     virt_machine_4_0_options(mc);
-    compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
+    compat_props_add(mc->compat_props, hw_compat_3_1, hw_compat_3_1_len);
 }
 DEFINE_VIRT_MACHINE(3, 1)
 
diff --git a/hw/core/machine.c b/hw/core/machine.c
index bd644c976b..d6204967c3 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -22,6 +22,19 @@
 #include "qemu/error-report.h"
 #include "sysemu/qtest.h"
 
+GlobalProperty hw_compat_3_1[] = {
+    {
+        .driver   = "pcie-root-port",
+        .property = "x-speed",
+        .value    = "2_5",
+    },{
+        .driver   = "pcie-root-port",
+        .property = "x-width",
+        .value    = "1",
+    },
+};
+const size_t hw_compat_3_1_len = G_N_ELEMENTS(hw_compat_3_1);
+
 static char *machine_get_accel(Object *obj, Error **errp)
 {
     MachineState *ms = MACHINE(obj);
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index f248662e97..33d09a832a 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -109,6 +109,15 @@ static struct e820_entry *e820_table;
 static unsigned e820_entries;
 struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
 
+GlobalProperty pc_compat_3_1[] = {
+    {
+        .driver   = "intel-iommu",
+        .property = "dma-drain",
+        .value    = "off",
+    },
+};
+const size_t pc_compat_3_1_len = G_N_ELEMENTS(pc_compat_3_1);
+
 void gsi_handler(void *opaque, int n, int level)
 {
     GSIState *s = opaque;
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 2423428acd..c938437627 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -440,14 +440,11 @@ DEFINE_I440FX_MACHINE(v4_0, "pc-i440fx-4.0", NULL,
 
 static void pc_i440fx_3_1_machine_options(MachineClass *m)
 {
-    static GlobalProperty compat[] = {
-        PC_COMPAT_3_1
-    };
-
     pc_i440fx_4_0_machine_options(m);
     m->is_default = 0;
     m->alias = NULL;
-    compat_props_add(m->compat_props, compat, G_N_ELEMENTS(compat));
+    compat_props_add(m->compat_props, hw_compat_3_1, hw_compat_3_1_len);
+    compat_props_add(m->compat_props, pc_compat_3_1, pc_compat_3_1_len);
 }
 
 DEFINE_I440FX_MACHINE(v3_1, "pc-i440fx-3.1", NULL,
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index d84614546c..fad3d6da17 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -323,14 +323,11 @@ DEFINE_Q35_MACHINE(v4_0, "pc-q35-4.0", NULL,
 
 static void pc_q35_3_1_machine_options(MachineClass *m)
 {
-    static GlobalProperty compat[] = {
-        PC_COMPAT_3_1
-    };
-
     pc_q35_4_0_machine_options(m);
     m->default_kernel_irqchip_split = false;
     m->alias = NULL;
-    compat_props_add(m->compat_props, compat, G_N_ELEMENTS(compat));
+    compat_props_add(m->compat_props, hw_compat_3_1, hw_compat_3_1_len);
+    compat_props_add(m->compat_props, pc_compat_3_1, pc_compat_3_1_len);
 }
 
 DEFINE_Q35_MACHINE(v3_1, "pc-q35-3.1", NULL,
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index f3b8c18de3..f04135fffd 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4023,12 +4023,8 @@ DEFINE_SPAPR_MACHINE(4_0, "4.0", true);
  */
 static void spapr_machine_3_1_class_options(MachineClass *mc)
 {
-    static GlobalProperty compat[] = {
-        HW_COMPAT_3_1
-    };
-
     spapr_machine_4_0_class_options(mc);
-    compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
+    compat_props_add(mc->compat_props, hw_compat_3_1, hw_compat_3_1_len);
     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power8_v2.0");
 }
 
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 21f3325c5a..5e8b48e75b 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -667,12 +667,8 @@ static void ccw_machine_3_1_instance_options(MachineState *machine)
 
 static void ccw_machine_3_1_class_options(MachineClass *mc)
 {
-    static GlobalProperty compat[] = {
-        HW_COMPAT_3_1
-    };
-
     ccw_machine_4_0_class_options(mc);
-    compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
+    compat_props_add(mc->compat_props, hw_compat_3_1, hw_compat_3_1_len);
 }
 DEFINE_CCW_MACHINE(3_1, "3.1", false);