7 files changed, 47 insertions, 14 deletions

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 0134d0d439..d3174f1402 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1952,12 +1952,9 @@ DEFINE_VIRT_MACHINE(2, 7)
 static void virt_machine_2_6_options(MachineClass *mc)
 {
     VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc));
-    static GlobalProperty compat[] = {
-        HW_COMPAT_2_6
-    };
 
     virt_machine_2_7_options(mc);
-    compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
+    compat_props_add(mc->compat_props, hw_compat_2_6, hw_compat_2_6_len);
     vmc->disallow_affinity_adjustment = true;
     /* Disable PMU for 2.6 as PMU support was first introduced in 2.7 */
     vmc->no_pmu = true;
diff --git a/hw/core/machine.c b/hw/core/machine.c
index cc92b0cc84..e27b1b5c34 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -193,6 +193,23 @@ GlobalProperty hw_compat_2_7[] = {
 };
 const size_t hw_compat_2_7_len = G_N_ELEMENTS(hw_compat_2_7);
 
+GlobalProperty hw_compat_2_6[] = {
+    {
+        .driver   = "virtio-mmio",
+        .property = "format_transport_address",
+        .value    = "off",
+    },{
+        .driver   = "virtio-pci",
+        .property = "disable-modern",
+        .value    = "on",
+    },{
+        .driver   = "virtio-pci",
+        .property = "disable-legacy",
+        .value    = "off",
+    },
+};
+const size_t hw_compat_2_6_len = G_N_ELEMENTS(hw_compat_2_6);
+
 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 ed46f9c27f..6c8ff0e928 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -258,6 +258,29 @@ GlobalProperty pc_compat_2_7[] = {
 };
 const size_t pc_compat_2_7_len = G_N_ELEMENTS(pc_compat_2_7);
 
+GlobalProperty pc_compat_2_6[] = {
+    {
+        .driver   = TYPE_X86_CPU,
+        .property = "cpuid-0xb",
+        .value    = "off",
+    },{
+        .driver   = "vmxnet3",
+        .property = "romfile",
+        .value    = "",
+    },
+    {
+        .driver = TYPE_X86_CPU,
+        .property = "fill-mtrr-mask",
+        .value = "off",
+    },
+    {
+        .driver   = "apic-common",
+        .property = "legacy-instance-id",
+        .value    = "on",
+    }
+};
+const size_t pc_compat_2_6_len = G_N_ELEMENTS(pc_compat_2_6);
+
 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 182d868de8..89e81a028a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -525,14 +525,12 @@ DEFINE_I440FX_MACHINE(v2_7, "pc-i440fx-2.7", NULL,
 static void pc_i440fx_2_6_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
-    static GlobalProperty compat[] = {
-        PC_COMPAT_2_6
-    };
 
     pc_i440fx_2_7_machine_options(m);
     pcmc->legacy_cpu_hotplug = true;
     pcmc->linuxboot_dma_enabled = false;
-    compat_props_add(m->compat_props, compat, G_N_ELEMENTS(compat));
+    compat_props_add(m->compat_props, hw_compat_2_6, hw_compat_2_6_len);
+    compat_props_add(m->compat_props, pc_compat_2_6, pc_compat_2_6_len);
 }
 
 DEFINE_I440FX_MACHINE(v2_6, "pc-i440fx-2.6", NULL,
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 35377524d0..efb70fb8af 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -412,14 +412,12 @@ DEFINE_Q35_MACHINE(v2_7, "pc-q35-2.7", NULL,
 static void pc_q35_2_6_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
-    static GlobalProperty compat[] = {
-        PC_COMPAT_2_6
-    };
 
     pc_q35_2_7_machine_options(m);
     pcmc->legacy_cpu_hotplug = true;
     pcmc->linuxboot_dma_enabled = false;
-    compat_props_add(m->compat_props, compat, G_N_ELEMENTS(compat));
+    compat_props_add(m->compat_props, hw_compat_2_6, hw_compat_2_6_len);
+    compat_props_add(m->compat_props, pc_compat_2_6, pc_compat_2_6_len);
 }
 
 DEFINE_Q35_MACHINE(v2_6, "pc-q35-2.6", NULL,
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index c83b0c0d66..eff015987d 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4262,7 +4262,6 @@ DEFINE_SPAPR_MACHINE(2_7, "2.7", false);
 static void spapr_machine_2_6_class_options(MachineClass *mc)
 {
     static GlobalProperty compat[] = {
-        HW_COMPAT_2_6
         {
             .driver   = TYPE_SPAPR_PCI_HOST_BRIDGE,
             .property = "ddw",
@@ -4272,6 +4271,7 @@ static void spapr_machine_2_6_class_options(MachineClass *mc)
 
     spapr_machine_2_7_class_options(mc);
     mc->has_hotpluggable_cpus = false;
+    compat_props_add(mc->compat_props, hw_compat_2_6, hw_compat_2_6_len);
     compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
 }
 
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index f28feedd4b..6137c97875 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -811,7 +811,6 @@ static void ccw_machine_2_6_class_options(MachineClass *mc)
 {
     S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
     static GlobalProperty compat[] = {
-        HW_COMPAT_2_6
         {
             .driver   = TYPE_S390_IPL,
             .property = "iplbext_migration",
@@ -825,6 +824,7 @@ static void ccw_machine_2_6_class_options(MachineClass *mc)
 
     s390mc->ri_allowed = false;
     ccw_machine_2_7_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_2_6, hw_compat_2_6_len);
     compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
 }
 DEFINE_CCW_MACHINE(2_6, "2.6", false);