diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index be2856c018aa..efd503d45e48 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -3180,10 +3180,17 @@ static void machvirt_machine_init(void)
 }
 type_init(machvirt_machine_init);
 
+static void virt_machine_9_0_options(MachineClass *mc)
+{
+}
+DEFINE_VIRT_MACHINE_AS_LATEST(9, 0)
+
 static void virt_machine_8_2_options(MachineClass *mc)
 {
+    virt_machine_9_0_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_8_2, hw_compat_8_2_len);
 }
-DEFINE_VIRT_MACHINE_AS_LATEST(8, 2)
+DEFINE_VIRT_MACHINE(8, 2)
 
 static void virt_machine_8_1_options(MachineClass *mc)
 {
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 0c1739814124..2699bcba5357 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -32,6 +32,9 @@
 #include "hw/virtio/virtio-net.h"
 #include "audio/audio.h"
 
+GlobalProperty hw_compat_8_2[] = {};
+const size_t hw_compat_8_2_len = G_N_ELEMENTS(hw_compat_8_2);
+
 GlobalProperty hw_compat_8_1[] = {
     { TYPE_PCI_BRIDGE, "x-pci-express-writeable-slt-bug", "true" },
     { "ramfb", "x-migrate", "off" },
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 29b9964733ed..496498df3a8f 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -78,6 +78,9 @@
     { "qemu64-" TYPE_X86_CPU, "model-id", "QEMU Virtual CPU version " v, },\
     { "athlon-" TYPE_X86_CPU, "model-id", "QEMU Virtual CPU version " v, },
 
+GlobalProperty pc_compat_8_2[] = {};
+const size_t pc_compat_8_2_len = G_N_ELEMENTS(pc_compat_8_2);
+
 GlobalProperty pc_compat_8_1[] = {};
 const size_t pc_compat_8_1_len = G_N_ELEMENTS(pc_compat_8_1);
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index eace8543358a..042c13cdbc33 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -545,13 +545,26 @@ static void pc_i440fx_machine_options(MachineClass *m)
                                      "Use a different south bridge than PIIX3");
 }
 
-static void pc_i440fx_8_2_machine_options(MachineClass *m)
+static void pc_i440fx_9_0_machine_options(MachineClass *m)
 {
     pc_i440fx_machine_options(m);
     m->alias = "pc";
     m->is_default = true;
 }
 
+DEFINE_I440FX_MACHINE(v9_0, "pc-i440fx-9.0", NULL,
+                      pc_i440fx_9_0_machine_options);
+
+static void pc_i440fx_8_2_machine_options(MachineClass *m)
+{
+    pc_i440fx_9_0_machine_options(m);
+    m->alias = NULL;
+    m->is_default = false;
+
+    compat_props_add(m->compat_props, hw_compat_8_2, hw_compat_8_2_len);
+    compat_props_add(m->compat_props, pc_compat_8_2, pc_compat_8_2_len);
+}
+
 DEFINE_I440FX_MACHINE(v8_2, "pc-i440fx-8.2", NULL,
                       pc_i440fx_8_2_machine_options);
 
@@ -560,8 +573,6 @@ static void pc_i440fx_8_1_machine_options(MachineClass *m)
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
 
     pc_i440fx_8_2_machine_options(m);
-    m->alias = NULL;
-    m->is_default = false;
     pcmc->broken_32bit_mem_addr_check = true;
 
     compat_props_add(m->compat_props, hw_compat_8_1, hw_compat_8_1_len);
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 4f3e5412f6b8..f43d5142b8e5 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -383,12 +383,23 @@ static void pc_q35_machine_options(MachineClass *m)
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
 }
 
-static void pc_q35_8_2_machine_options(MachineClass *m)
+static void pc_q35_9_0_machine_options(MachineClass *m)
 {
     pc_q35_machine_options(m);
     m->alias = "q35";
 }
 
+DEFINE_Q35_MACHINE(v9_0, "pc-q35-9.0", NULL,
+                   pc_q35_9_0_machine_options);
+
+static void pc_q35_8_2_machine_options(MachineClass *m)
+{
+    pc_q35_9_0_machine_options(m);
+    m->alias = NULL;
+    compat_props_add(m->compat_props, hw_compat_8_2, hw_compat_8_2_len);
+    compat_props_add(m->compat_props, pc_compat_8_2, pc_compat_8_2_len);
+}
+
 DEFINE_Q35_MACHINE(v8_2, "pc-q35-8.2", NULL,
                    pc_q35_8_2_machine_options);
 
diff --git a/hw/m68k/virt.c b/hw/m68k/virt.c
index 2e49e262ee0e..e2792ef46d93 100644
--- a/hw/m68k/virt.c
+++ b/hw/m68k/virt.c
@@ -346,10 +346,17 @@ type_init(virt_machine_register_types)
     } \
     type_init(machvirt_machine_##major##_##minor##_init);
 
+static void virt_machine_9_0_options(MachineClass *mc)
+{
+}
+DEFINE_VIRT_MACHINE(9, 0, true)
+
 static void virt_machine_8_2_options(MachineClass *mc)
 {
+    virt_machine_9_0_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_8_2, hw_compat_8_2_len);
 }
-DEFINE_VIRT_MACHINE(8, 2, true)
+DEFINE_VIRT_MACHINE(8, 2, false)
 
 static void virt_machine_8_1_options(MachineClass *mc)
 {
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index df09aa9d6a00..9b6c1c129f25 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4785,15 +4785,26 @@ static void spapr_machine_latest_class_options(MachineClass *mc)
     }                                                                \
     type_init(spapr_machine_register_##suffix)
 
+/*
+ * pseries-9.0
+ */
+static void spapr_machine_9_0_class_options(MachineClass *mc)
+{
+    /* Defaults for the latest behaviour inherited from the base class */
+}
+
+DEFINE_SPAPR_MACHINE(9_0, "9.0", true);
+
 /*
  * pseries-8.2
  */
 static void spapr_machine_8_2_class_options(MachineClass *mc)
 {
-    /* Defaults for the latest behaviour inherited from the base class */
+    spapr_machine_9_0_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_8_2, hw_compat_8_2_len);
 }
 
-DEFINE_SPAPR_MACHINE(8_2, "8.2", true);
+DEFINE_SPAPR_MACHINE(8_2, "8.2", false);
 
 /*
  * pseries-8.1
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 7262725d2e8a..1169e20b94fe 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -855,14 +855,26 @@ bool css_migration_enabled(void)
     }                                                                         \
     type_init(ccw_machine_register_##suffix)
 
+static void ccw_machine_9_0_instance_options(MachineState *machine)
+{
+}
+
+static void ccw_machine_9_0_class_options(MachineClass *mc)
+{
+}
+DEFINE_CCW_MACHINE(9_0, "9.0", true);
+
 static void ccw_machine_8_2_instance_options(MachineState *machine)
 {
+    ccw_machine_9_0_instance_options(machine);
 }
 
 static void ccw_machine_8_2_class_options(MachineClass *mc)
 {
+    ccw_machine_9_0_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_8_2, hw_compat_8_2_len);
 }
-DEFINE_CCW_MACHINE(8_2, "8.2", true);
+DEFINE_CCW_MACHINE(8_2, "8.2", false);
 
 static void ccw_machine_8_1_instance_options(MachineState *machine)
 {
diff --git a/include/hw/boards.h b/include/hw/boards.h
index a7359992980a..bda3c91efa5b 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -419,6 +419,9 @@ struct MachineState {
     } \
     type_init(machine_initfn##_register_types)
 
+extern GlobalProperty hw_compat_8_2[];
+extern const size_t hw_compat_8_2_len;
+
 extern GlobalProperty hw_compat_8_1[];
 extern const size_t hw_compat_8_1_len;
 
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index a10ceeabbfac..916af29f7c0d 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -210,6 +210,9 @@ void pc_madt_cpu_entry(int uid, const CPUArchIdList *apic_ids,
 /* sgx.c */
 void pc_machine_init_sgx_epc(PCMachineState *pcms);
 
+extern GlobalProperty pc_compat_8_2[];
+extern const size_t pc_compat_8_2_len;
+
 extern GlobalProperty pc_compat_8_1[];
 extern const size_t pc_compat_8_1_len;
 
