7 files changed, 65 insertions, 6 deletions
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index ecfee362a1..acf9bfbece 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2546,10 +2546,17 @@ static void machvirt_machine_init(void)
 }
 type_init(machvirt_machine_init);
 
+static void virt_machine_5_2_options(MachineClass *mc)
+{
+}
+DEFINE_VIRT_MACHINE_AS_LATEST(5, 2)
+
 static void virt_machine_5_1_options(MachineClass *mc)
 {
+    virt_machine_5_2_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_5_1, hw_compat_5_1_len);
 }
-DEFINE_VIRT_MACHINE_AS_LATEST(5, 1)
+DEFINE_VIRT_MACHINE(5, 1)
 
 static void virt_machine_5_0_options(MachineClass *mc)
 {
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 8d1a90c6cf..cf5f2dfaeb 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -28,6 +28,9 @@
 #include "hw/mem/nvdimm.h"
 #include "migration/vmstate.h"
 
+GlobalProperty hw_compat_5_1[] = {};
+const size_t hw_compat_5_1_len = G_N_ELEMENTS(hw_compat_5_1);
+
 GlobalProperty hw_compat_5_0[] = {
     { "pci-host-bridge", "x-config-reg-migration-enabled", "off" },
     { "virtio-balloon-device", "page-poison", "false" },
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 47c5ca3e34..9aa813949c 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -97,6 +97,9 @@
 #include "fw_cfg.h"
 #include "trace.h"
 
+GlobalProperty pc_compat_5_1[] = {};
+const size_t pc_compat_5_1_len = G_N_ELEMENTS(pc_compat_5_1);
+
 GlobalProperty pc_compat_5_0[] = {
 };
 const size_t pc_compat_5_0_len = G_N_ELEMENTS(pc_compat_5_0);
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index b789e83f9a..c5ba70ca17 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -426,7 +426,7 @@ static void pc_i440fx_machine_options(MachineClass *m)
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
 }
 
-static void pc_i440fx_5_1_machine_options(MachineClass *m)
+static void pc_i440fx_5_2_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_i440fx_machine_options(m);
@@ -435,6 +435,18 @@ static void pc_i440fx_5_1_machine_options(MachineClass *m)
     pcmc->default_cpu_version = 1;
 }
 
+DEFINE_I440FX_MACHINE(v5_2, "pc-i440fx-5.2", NULL,
+                      pc_i440fx_5_2_machine_options);
+
+static void pc_i440fx_5_1_machine_options(MachineClass *m)
+{
+    pc_i440fx_5_2_machine_options(m);
+    m->alias = NULL;
+    m->is_default = false;
+    compat_props_add(m->compat_props, hw_compat_5_1, hw_compat_5_1_len);
+    compat_props_add(m->compat_props, pc_compat_5_1, pc_compat_5_1_len);
+}
+
 DEFINE_I440FX_MACHINE(v5_1, "pc-i440fx-5.1", NULL,
                       pc_i440fx_5_1_machine_options);
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index a3e607a544..0cb9c18cd4 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -353,7 +353,7 @@ static void pc_q35_machine_options(MachineClass *m)
     m->max_cpus = 288;
 }
 
-static void pc_q35_5_1_machine_options(MachineClass *m)
+static void pc_q35_5_2_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_q35_machine_options(m);
@@ -361,6 +361,17 @@ static void pc_q35_5_1_machine_options(MachineClass *m)
     pcmc->default_cpu_version = 1;
 }
 
+DEFINE_Q35_MACHINE(v5_2, "pc-q35-5.2", NULL,
+                   pc_q35_5_2_machine_options);
+
+static void pc_q35_5_1_machine_options(MachineClass *m)
+{
+    pc_q35_5_2_machine_options(m);
+    m->alias = NULL;
+    compat_props_add(m->compat_props, hw_compat_5_1, hw_compat_5_1_len);
+    compat_props_add(m->compat_props, pc_compat_5_1, pc_compat_5_1_len);
+}
+
 DEFINE_Q35_MACHINE(v5_1, "pc-q35-5.1", NULL,
                    pc_q35_5_1_machine_options);
 
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 0ae293ec94..1c8d0981b3 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4580,14 +4580,25 @@ static void spapr_machine_latest_class_options(MachineClass *mc)
     type_init(spapr_machine_register_##suffix)
 
 /*
+ * pseries-5.2
+ */
+static void spapr_machine_5_2_class_options(MachineClass *mc)
+{
+    /* Defaults for the latest behaviour inherited from the base class */
+}
+
+DEFINE_SPAPR_MACHINE(5_2, "5.2", true);
+
+/*
  * pseries-5.1
  */
 static void spapr_machine_5_1_class_options(MachineClass *mc)
 {
-    /* Defaults for the latest behaviour inherited from the base class */
+    spapr_machine_5_2_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_5_1, hw_compat_5_1_len);
 }
 
-DEFINE_SPAPR_MACHINE(5_1, "5.1", true);
+DEFINE_SPAPR_MACHINE(5_1, "5.1", false);
 
 /*
  * pseries-5.0
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index e72c61d2ea..f4ea6a9545 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -801,14 +801,26 @@ bool css_migration_enabled(void)
     }                                                                         \
     type_init(ccw_machine_register_##suffix)
 
+static void ccw_machine_5_2_instance_options(MachineState *machine)
+{
+}
+
+static void ccw_machine_5_2_class_options(MachineClass *mc)
+{
+}
+DEFINE_CCW_MACHINE(5_2, "5.2", true);
+
 static void ccw_machine_5_1_instance_options(MachineState *machine)
 {
+    ccw_machine_5_2_instance_options(machine);
 }
 
 static void ccw_machine_5_1_class_options(MachineClass *mc)
 {
+    ccw_machine_5_2_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_5_1, hw_compat_5_1_len);
 }
-DEFINE_CCW_MACHINE(5_1, "5.1", true);
+DEFINE_CCW_MACHINE(5_1, "5.1", false);
 
 static void ccw_machine_5_0_instance_options(MachineState *machine)
 {