diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index d4bedc260712..02f654b63278 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2147,10 +2147,15 @@ static void machvirt_machine_init(void)
 }
 type_init(machvirt_machine_init);
 
+static void virt_machine_5_0_options(MachineClass *mc)
+{
+}
+DEFINE_VIRT_MACHINE_AS_LATEST(5, 0)
+
 static void virt_machine_4_2_options(MachineClass *mc)
 {
 }
-DEFINE_VIRT_MACHINE_AS_LATEST(4, 2)
+DEFINE_VIRT_MACHINE(4, 2)
 
 static void virt_machine_4_1_options(MachineClass *mc)
 {
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 1689ad3bf8af..21fe2d974817 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -27,6 +27,9 @@
 #include "hw/pci/pci.h"
 #include "hw/mem/nvdimm.h"
 
+GlobalProperty hw_compat_4_2[] = {};
+const size_t hw_compat_4_2_len = G_N_ELEMENTS(hw_compat_4_2);
+
 GlobalProperty hw_compat_4_1[] = {
     { "virtio-pci", "x-pcie-flr-init", "off" },
 };
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 96715f8a3f99..2126c49ee7c5 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -103,6 +103,9 @@
 
 struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
 
+GlobalProperty pc_compat_4_2[] = {};
+const size_t pc_compat_4_2_len = G_N_ELEMENTS(pc_compat_4_2);
+
 GlobalProperty pc_compat_4_1[] = {};
 const size_t pc_compat_4_1_len = G_N_ELEMENTS(pc_compat_4_1);
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 2aefa3b8dfe3..65915ea23c4a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -424,7 +424,7 @@ static void pc_i440fx_machine_options(MachineClass *m)
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_RAMFB_DEVICE);
 }
 
-static void pc_i440fx_4_2_machine_options(MachineClass *m)
+static void pc_i440fx_5_0_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_i440fx_machine_options(m);
@@ -433,6 +433,18 @@ static void pc_i440fx_4_2_machine_options(MachineClass *m)
     pcmc->default_cpu_version = 1;
 }
 
+DEFINE_I440FX_MACHINE(v5_0, "pc-i440fx-5.0", NULL,
+                      pc_i440fx_5_0_machine_options);
+
+static void pc_i440fx_4_2_machine_options(MachineClass *m)
+{
+    pc_i440fx_5_0_machine_options(m);
+    m->alias = NULL;
+    m->is_default = 0;
+    compat_props_add(m->compat_props, hw_compat_4_2, hw_compat_4_2_len);
+    compat_props_add(m->compat_props, pc_compat_4_2, pc_compat_4_2_len);
+}
+
 DEFINE_I440FX_MACHINE(v4_2, "pc-i440fx-4.2", NULL,
                       pc_i440fx_4_2_machine_options);
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index d51f5247276d..c582a6f6a363 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -348,7 +348,7 @@ static void pc_q35_machine_options(MachineClass *m)
     m->max_cpus = 288;
 }
 
-static void pc_q35_4_2_machine_options(MachineClass *m)
+static void pc_q35_5_0_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_q35_machine_options(m);
@@ -356,6 +356,17 @@ static void pc_q35_4_2_machine_options(MachineClass *m)
     pcmc->default_cpu_version = 1;
 }
 
+DEFINE_Q35_MACHINE(v5_0, "pc-q35-5.0", NULL,
+                   pc_q35_5_0_machine_options);
+
+static void pc_q35_4_2_machine_options(MachineClass *m)
+{
+    pc_q35_5_0_machine_options(m);
+    m->alias = NULL;
+    compat_props_add(m->compat_props, hw_compat_4_2, hw_compat_4_2_len);
+    compat_props_add(m->compat_props, pc_compat_4_2, pc_compat_4_2_len);
+}
+
 DEFINE_Q35_MACHINE(v4_2, "pc-q35-4.2", NULL,
                    pc_q35_4_2_machine_options);
 
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 94f9d27096af..d5c33f2c19d3 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4486,15 +4486,26 @@ static const TypeInfo spapr_machine_info = {
     }                                                                \
     type_init(spapr_machine_register_##suffix)
 
+/*
+ * pseries-5.0
+ */
+static void spapr_machine_5_0_class_options(MachineClass *mc)
+{
+    /* Defaults for the latest behaviour inherited from the base class */
+}
+
+DEFINE_SPAPR_MACHINE(5_0, "5.0", true);
+
 /*
  * pseries-4.2
  */
 static void spapr_machine_4_2_class_options(MachineClass *mc)
 {
-    /* Defaults for the latest behaviour inherited from the base class */
+    spapr_machine_5_0_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_4_2, hw_compat_4_2_len);
 }
 
-DEFINE_SPAPR_MACHINE(4_2, "4.2", true);
+DEFINE_SPAPR_MACHINE(4_2, "4.2", false);
 
 /*
  * pseries-4.1
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index d3edeef0ad92..01e7e209a5da 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -639,14 +639,26 @@ bool css_migration_enabled(void)
     }                                                                         \
     type_init(ccw_machine_register_##suffix)
 
+static void ccw_machine_5_0_instance_options(MachineState *machine)
+{
+}
+
+static void ccw_machine_5_0_class_options(MachineClass *mc)
+{
+}
+DEFINE_CCW_MACHINE(5_0, "5.0", true);
+
 static void ccw_machine_4_2_instance_options(MachineState *machine)
 {
+    ccw_machine_5_0_instance_options(machine);
 }
 
 static void ccw_machine_4_2_class_options(MachineClass *mc)
 {
+    ccw_machine_5_0_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_4_2, hw_compat_4_2_len);
 }
-DEFINE_CCW_MACHINE(4_2, "4.2", true);
+DEFINE_CCW_MACHINE(4_2, "4.2", false);
 
 static void ccw_machine_4_1_instance_options(MachineState *machine)
 {
diff --git a/include/hw/boards.h b/include/hw/boards.h
index de45087f34cb..24cbeecbaecc 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -329,6 +329,9 @@ struct MachineState {
     } \
     type_init(machine_initfn##_register_types)
 
+extern GlobalProperty hw_compat_4_2[];
+extern const size_t hw_compat_4_2_len;
+
 extern GlobalProperty hw_compat_4_1[];
 extern const size_t hw_compat_4_1_len;
 
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index e6fa8418ca61..0b23fc73c99b 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -239,6 +239,9 @@ void pc_system_firmware_init(PCMachineState *pcms, MemoryRegion *rom_memory);
 void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
                        const CPUArchIdList *apic_ids, GArray *entry);
 
+extern GlobalProperty pc_compat_4_2[];
+extern const size_t pc_compat_4_2_len;
+
 extern GlobalProperty pc_compat_4_1[];
 extern const size_t pc_compat_4_1_len;
 
