diff --git a/include/hw/boards.h b/include/hw/boards.h
index 8b8f6d5c00d..50e0cf4278e 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -425,6 +425,9 @@ struct MachineState {
     } \
     type_init(machine_initfn##_register_types)
 
+extern GlobalProperty hw_compat_9_0[];
+extern const size_t hw_compat_9_0_len;
+
 extern GlobalProperty hw_compat_8_2[];
 extern const size_t hw_compat_8_2_len;
 
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 27a68071d77..349f79df086 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -198,6 +198,9 @@ void pc_system_parse_ovmf_flash(uint8_t *flash_ptr, size_t flash_size);
 /* sgx.c */
 void pc_machine_init_sgx_epc(PCMachineState *pcms);
 
+extern GlobalProperty pc_compat_9_0[];
+extern const size_t pc_compat_9_0_len;
+
 extern GlobalProperty pc_compat_8_2[];
 extern const size_t pc_compat_8_2_len;
 
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index a9a913aeadb..c9119ef3847 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -3223,10 +3223,17 @@ static void machvirt_machine_init(void)
 }
 type_init(machvirt_machine_init);
 
-static void virt_machine_9_0_options(MachineClass *mc)
+static void virt_machine_9_1_options(MachineClass *mc)
 {
 }
-DEFINE_VIRT_MACHINE_AS_LATEST(9, 0)
+DEFINE_VIRT_MACHINE_AS_LATEST(9, 1)
+
+static void virt_machine_9_0_options(MachineClass *mc)
+{
+    virt_machine_9_1_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_9_0, hw_compat_9_0_len);
+}
+DEFINE_VIRT_MACHINE(9, 0)
 
 static void virt_machine_8_2_options(MachineClass *mc)
 {
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 37ede0e7d4f..a92bec23147 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -33,6 +33,9 @@
 #include "hw/virtio/virtio-iommu.h"
 #include "audio/audio.h"
 
+GlobalProperty hw_compat_9_0[] = {};
+const size_t hw_compat_9_0_len = G_N_ELEMENTS(hw_compat_9_0);
+
 GlobalProperty hw_compat_8_2[] = {
     { "migration", "zero-page-detection", "legacy"},
     { TYPE_VIRTIO_IOMMU_PCI, "granule", "4k" },
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 5c21b0c4dbf..b0d818b2094 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_9_0[] = {};
+const size_t pc_compat_9_0_len = G_N_ELEMENTS(pc_compat_9_0);
+
 GlobalProperty pc_compat_8_2[] = {};
 const size_t pc_compat_8_2_len = G_N_ELEMENTS(pc_compat_8_2);
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 18ba0766092..8850c49c66a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -513,13 +513,26 @@ static void pc_i440fx_machine_options(MachineClass *m)
                                      "Use a different south bridge than PIIX3");
 }
 
-static void pc_i440fx_9_0_machine_options(MachineClass *m)
+static void pc_i440fx_9_1_machine_options(MachineClass *m)
 {
     pc_i440fx_machine_options(m);
     m->alias = "pc";
     m->is_default = true;
 }
 
+DEFINE_I440FX_MACHINE(v9_1, "pc-i440fx-9.1", NULL,
+                      pc_i440fx_9_1_machine_options);
+
+static void pc_i440fx_9_0_machine_options(MachineClass *m)
+{
+    pc_i440fx_9_1_machine_options(m);
+    m->alias = NULL;
+    m->is_default = false;
+
+    compat_props_add(m->compat_props, hw_compat_9_0, hw_compat_9_0_len);
+    compat_props_add(m->compat_props, pc_compat_9_0, pc_compat_9_0_len);
+}
+
 DEFINE_I440FX_MACHINE(v9_0, "pc-i440fx-9.0", NULL,
                       pc_i440fx_9_0_machine_options);
 
@@ -528,8 +541,6 @@ static void pc_i440fx_8_2_machine_options(MachineClass *m)
     PCMachineClass *pcmc = PC_MACHINE_CLASS(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);
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index c7bc8a2041f..6e1180d4b60 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -365,12 +365,23 @@ static void pc_q35_machine_options(MachineClass *m)
                      pc_q35_compat_defaults, pc_q35_compat_defaults_len);
 }
 
-static void pc_q35_9_0_machine_options(MachineClass *m)
+static void pc_q35_9_1_machine_options(MachineClass *m)
 {
     pc_q35_machine_options(m);
     m->alias = "q35";
 }
 
+DEFINE_Q35_MACHINE(v9_1, "pc-q35-9.1", NULL,
+                   pc_q35_9_1_machine_options);
+
+static void pc_q35_9_0_machine_options(MachineClass *m)
+{
+    pc_q35_9_1_machine_options(m);
+    m->alias = NULL;
+    compat_props_add(m->compat_props, hw_compat_9_0, hw_compat_9_0_len);
+    compat_props_add(m->compat_props, pc_compat_9_0, pc_compat_9_0_len);
+}
+
 DEFINE_Q35_MACHINE(v9_0, "pc-q35-9.0", NULL,
                    pc_q35_9_0_machine_options);
 
@@ -378,7 +389,6 @@ static void pc_q35_8_2_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_q35_9_0_machine_options(m);
-    m->alias = NULL;
     m->max_cpus = 1024;
     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);
diff --git a/hw/m68k/virt.c b/hw/m68k/virt.c
index b8e5e102e6b..09bc9bdfefb 100644
--- a/hw/m68k/virt.c
+++ b/hw/m68k/virt.c
@@ -357,10 +357,17 @@ type_init(virt_machine_register_types)
     } \
     type_init(machvirt_machine_##major##_##minor##_init);
 
-static void virt_machine_9_0_options(MachineClass *mc)
+static void virt_machine_9_1_options(MachineClass *mc)
 {
 }
-DEFINE_VIRT_MACHINE(9, 0, true)
+DEFINE_VIRT_MACHINE(9, 1, true)
+
+static void virt_machine_9_0_options(MachineClass *mc)
+{
+    virt_machine_9_1_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_9_0, hw_compat_9_0_len);
+}
+DEFINE_VIRT_MACHINE(9, 0, false)
 
 static void virt_machine_8_2_options(MachineClass *mc)
 {
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index e9bc97fee08..36ada4d0baf 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4806,14 +4806,25 @@ static void spapr_machine_latest_class_options(MachineClass *mc)
     type_init(spapr_machine_register_##suffix)
 
 /*
- * pseries-9.0
+ * pseries-9.1
  */
-static void spapr_machine_9_0_class_options(MachineClass *mc)
+static void spapr_machine_9_1_class_options(MachineClass *mc)
 {
     /* Defaults for the latest behaviour inherited from the base class */
 }
 
-DEFINE_SPAPR_MACHINE(9_0, "9.0", true);
+DEFINE_SPAPR_MACHINE(9_1, "9.1", true);
+
+/*
+ * pseries-9.0
+ */
+static void spapr_machine_9_0_class_options(MachineClass *mc)
+{
+    spapr_machine_9_1_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_9_0, hw_compat_9_0_len);
+}
+
+DEFINE_SPAPR_MACHINE(9_0, "9.0", false);
 
 /*
  * pseries-8.2
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index b1dcb3857f0..7cebbf6c02a 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -859,14 +859,26 @@ bool css_migration_enabled(void)
     }                                                                         \
     type_init(ccw_machine_register_##suffix)
 
+static void ccw_machine_9_1_instance_options(MachineState *machine)
+{
+}
+
+static void ccw_machine_9_1_class_options(MachineClass *mc)
+{
+}
+DEFINE_CCW_MACHINE(9_1, "9.1", true);
+
 static void ccw_machine_9_0_instance_options(MachineState *machine)
 {
+    ccw_machine_9_1_instance_options(machine);
 }
 
 static void ccw_machine_9_0_class_options(MachineClass *mc)
 {
+    ccw_machine_9_1_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_9_0, hw_compat_9_0_len);
 }
-DEFINE_CCW_MACHINE(9_0, "9.0", true);
+DEFINE_CCW_MACHINE(9_0, "9.0", false);
 
 static void ccw_machine_8_2_instance_options(MachineState *machine)
 {
