[PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options

Stefan Hajnoczi posted 7 patches 5 years, 5 months ago
[PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options
Posted by Stefan Hajnoczi 5 years, 5 months ago
arm, i386, ppc, and s390x have versioned machine types and associated
compatibility options. Introduce new ones now that QEMU 5.1 has been
released.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 include/hw/boards.h        |  3 +++
 include/hw/i386/pc.h       |  3 +++
 hw/arm/virt.c              |  9 ++++++++-
 hw/core/machine.c          |  4 ++++
 hw/i386/pc.c               |  4 ++++
 hw/i386/pc_piix.c          | 14 +++++++++++++-
 hw/i386/pc_q35.c           | 13 ++++++++++++-
 hw/ppc/spapr.c             | 15 +++++++++++++--
 hw/s390x/s390-virtio-ccw.c | 14 +++++++++++++-
 9 files changed, 73 insertions(+), 6 deletions(-)

diff --git a/include/hw/boards.h b/include/hw/boards.h
index 426ce5f625..bc5b82ad20 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -319,6 +319,9 @@ struct MachineState {
     } \
     type_init(machine_initfn##_register_types)
 
+extern GlobalProperty hw_compat_5_1[];
+extern const size_t hw_compat_5_1_len;
+
 extern GlobalProperty hw_compat_5_0[];
 extern const size_t hw_compat_5_0_len;
 
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 3d7ed3a55e..fe52e165b2 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -193,6 +193,9 @@ 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_5_1[];
+extern const size_t pc_compat_5_1_len;
+
 extern GlobalProperty pc_compat_5_0[];
 extern const size_t pc_compat_5_0_len;
 
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..a6f7e4e8d7 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -28,6 +28,10 @@
 #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..4afcf17f99 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -97,6 +97,10 @@
 #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..9ce1f9c5d6 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_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..4acaad557c 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_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
@@ -4579,15 +4579,26 @@ 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)
 {
-- 
2.26.2

Re: [PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options
Posted by Cornelia Huck 5 years, 5 months ago
On Tue, 18 Aug 2020 15:33:43 +0100
Stefan Hajnoczi <stefanha@redhat.com> wrote:

> arm, i386, ppc, and s390x have versioned machine types and associated
> compatibility options. Introduce new ones now that QEMU 5.1 has been
> released.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  include/hw/boards.h        |  3 +++
>  include/hw/i386/pc.h       |  3 +++
>  hw/arm/virt.c              |  9 ++++++++-
>  hw/core/machine.c          |  4 ++++
>  hw/i386/pc.c               |  4 ++++
>  hw/i386/pc_piix.c          | 14 +++++++++++++-
>  hw/i386/pc_q35.c           | 13 ++++++++++++-
>  hw/ppc/spapr.c             | 15 +++++++++++++--
>  hw/s390x/s390-virtio-ccw.c | 14 +++++++++++++-
>  9 files changed, 73 insertions(+), 6 deletions(-)

https://lore.kernel.org/qemu-devel/20200728094645.272149-1-cohuck@redhat.com/
is already out there :)


Re: [PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options
Posted by Igor Mammedov 5 years, 5 months ago
On Tue, 18 Aug 2020 17:11:32 +0200
Cornelia Huck <cohuck@redhat.com> wrote:

> On Tue, 18 Aug 2020 15:33:43 +0100
> Stefan Hajnoczi <stefanha@redhat.com> wrote:
> 
> > arm, i386, ppc, and s390x have versioned machine types and associated
> > compatibility options. Introduce new ones now that QEMU 5.1 has been
> > released.
> > 
> > Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> > ---
> >  include/hw/boards.h        |  3 +++
> >  include/hw/i386/pc.h       |  3 +++
> >  hw/arm/virt.c              |  9 ++++++++-
> >  hw/core/machine.c          |  4 ++++
> >  hw/i386/pc.c               |  4 ++++
> >  hw/i386/pc_piix.c          | 14 +++++++++++++-
> >  hw/i386/pc_q35.c           | 13 ++++++++++++-
> >  hw/ppc/spapr.c             | 15 +++++++++++++--
> >  hw/s390x/s390-virtio-ccw.c | 14 +++++++++++++-
> >  9 files changed, 73 insertions(+), 6 deletions(-)  
> 
> https://lore.kernel.org/qemu-devel/20200728094645.272149-1-cohuck@redhat.com/
> is already out there :)

That one doesn't apply anymore (or I did something wrong when applying it),

but Stefan's version applies cleanly

> 
> 


Re: [PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options
Posted by Cornelia Huck 5 years, 5 months ago
On Wed, 19 Aug 2020 14:54:25 +0200
Igor Mammedov <imammedo@redhat.com> wrote:

> On Tue, 18 Aug 2020 17:11:32 +0200
> Cornelia Huck <cohuck@redhat.com> wrote:
> 
> > On Tue, 18 Aug 2020 15:33:43 +0100
> > Stefan Hajnoczi <stefanha@redhat.com> wrote:
> >   
> > > arm, i386, ppc, and s390x have versioned machine types and associated
> > > compatibility options. Introduce new ones now that QEMU 5.1 has been
> > > released.
> > > 
> > > Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> > > ---
> > >  include/hw/boards.h        |  3 +++
> > >  include/hw/i386/pc.h       |  3 +++
> > >  hw/arm/virt.c              |  9 ++++++++-
> > >  hw/core/machine.c          |  4 ++++
> > >  hw/i386/pc.c               |  4 ++++
> > >  hw/i386/pc_piix.c          | 14 +++++++++++++-
> > >  hw/i386/pc_q35.c           | 13 ++++++++++++-
> > >  hw/ppc/spapr.c             | 15 +++++++++++++--
> > >  hw/s390x/s390-virtio-ccw.c | 14 +++++++++++++-
> > >  9 files changed, 73 insertions(+), 6 deletions(-)    
> > 
> > https://lore.kernel.org/qemu-devel/20200728094645.272149-1-cohuck@redhat.com/
> > is already out there :)  
> 
> That one doesn't apply anymore (or I did something wrong when applying it),
> 
> but Stefan's version applies cleanly

Seems that there were some changes afterwards. I'd prefer to just
respin mine, though.


Re: [PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options
Posted by Stefan Hajnoczi 5 years, 5 months ago
On Tue, Aug 18, 2020 at 05:11:32PM +0200, Cornelia Huck wrote:
> On Tue, 18 Aug 2020 15:33:43 +0100
> Stefan Hajnoczi <stefanha@redhat.com> wrote:
> 
> > arm, i386, ppc, and s390x have versioned machine types and associated
> > compatibility options. Introduce new ones now that QEMU 5.1 has been
> > released.
> > 
> > Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> > ---
> >  include/hw/boards.h        |  3 +++
> >  include/hw/i386/pc.h       |  3 +++
> >  hw/arm/virt.c              |  9 ++++++++-
> >  hw/core/machine.c          |  4 ++++
> >  hw/i386/pc.c               |  4 ++++
> >  hw/i386/pc_piix.c          | 14 +++++++++++++-
> >  hw/i386/pc_q35.c           | 13 ++++++++++++-
> >  hw/ppc/spapr.c             | 15 +++++++++++++--
> >  hw/s390x/s390-virtio-ccw.c | 14 +++++++++++++-
> >  9 files changed, 73 insertions(+), 6 deletions(-)
> 
> https://lore.kernel.org/qemu-devel/20200728094645.272149-1-cohuck@redhat.com/
> is already out there :)

You're too quick! :)

Next time I'll write a script and monitor qemu.git for the release tag
so I can be first!!!!!!111

Stefan
Re: [PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options
Posted by Laszlo Ersek 5 years, 5 months ago
On 08/19/20 16:12, Stefan Hajnoczi wrote:
> On Tue, Aug 18, 2020 at 05:11:32PM +0200, Cornelia Huck wrote:
>> On Tue, 18 Aug 2020 15:33:43 +0100
>> Stefan Hajnoczi <stefanha@redhat.com> wrote:
>>
>>> arm, i386, ppc, and s390x have versioned machine types and associated
>>> compatibility options. Introduce new ones now that QEMU 5.1 has been
>>> released.
>>>
>>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>>> ---
>>>  include/hw/boards.h        |  3 +++
>>>  include/hw/i386/pc.h       |  3 +++
>>>  hw/arm/virt.c              |  9 ++++++++-
>>>  hw/core/machine.c          |  4 ++++
>>>  hw/i386/pc.c               |  4 ++++
>>>  hw/i386/pc_piix.c          | 14 +++++++++++++-
>>>  hw/i386/pc_q35.c           | 13 ++++++++++++-
>>>  hw/ppc/spapr.c             | 15 +++++++++++++--
>>>  hw/s390x/s390-virtio-ccw.c | 14 +++++++++++++-
>>>  9 files changed, 73 insertions(+), 6 deletions(-)
>>
>> https://lore.kernel.org/qemu-devel/20200728094645.272149-1-cohuck@redhat.com/
>> is already out there :)
> 
> You're too quick! :)
> 
> Next time I'll write a script and monitor qemu.git for the release tag
> so I can be first!!!!!!111

You're joking, but a template patch or some other automatism that opens
the next development tree *BY* introducing new machine types would be
nothing to frown at.

Another option would be for Peter to delay opening up the next
development tree until he could immediately merge a patch with the new
machine types (posted by whoever, near the end of the HFF or something).

Thanks
Laszlo


Re: [PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options
Posted by Philippe Mathieu-Daudé 5 years, 5 months ago
On 8/19/20 4:38 PM, Laszlo Ersek wrote:
> On 08/19/20 16:12, Stefan Hajnoczi wrote:
>> On Tue, Aug 18, 2020 at 05:11:32PM +0200, Cornelia Huck wrote:
>>> On Tue, 18 Aug 2020 15:33:43 +0100
>>> Stefan Hajnoczi <stefanha@redhat.com> wrote:
>>>
>>>> arm, i386, ppc, and s390x have versioned machine types and associated
>>>> compatibility options. Introduce new ones now that QEMU 5.1 has been
>>>> released.
>>>>
>>>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>>>> ---
>>>>  include/hw/boards.h        |  3 +++
>>>>  include/hw/i386/pc.h       |  3 +++
>>>>  hw/arm/virt.c              |  9 ++++++++-
>>>>  hw/core/machine.c          |  4 ++++
>>>>  hw/i386/pc.c               |  4 ++++
>>>>  hw/i386/pc_piix.c          | 14 +++++++++++++-
>>>>  hw/i386/pc_q35.c           | 13 ++++++++++++-
>>>>  hw/ppc/spapr.c             | 15 +++++++++++++--
>>>>  hw/s390x/s390-virtio-ccw.c | 14 +++++++++++++-
>>>>  9 files changed, 73 insertions(+), 6 deletions(-)
>>>
>>> https://lore.kernel.org/qemu-devel/20200728094645.272149-1-cohuck@redhat.com/
>>> is already out there :)
>>
>> You're too quick! :)
>>
>> Next time I'll write a script and monitor qemu.git for the release tag
>> so I can be first!!!!!!111
> 
> You're joking, but a template patch or some other automatism that opens
> the next development tree *BY* introducing new machine types would be
> nothing to frown at.
> 
> Another option would be for Peter to delay opening up the next
> development tree until he could immediately merge a patch with the new
> machine types (posted by whoever, near the end of the HFF or something).

Or this can be the "Open the tree for development" first patch :)

> 
> Thanks
> Laszlo
> 
> 


Re: [PATCH v6 2/7] hw: add 5.2 machine types and 5.1 compat options
Posted by Igor Mammedov 5 years, 5 months ago
On Tue, 18 Aug 2020 15:33:43 +0100
Stefan Hajnoczi <stefanha@redhat.com> wrote:

> arm, i386, ppc, and s390x have versioned machine types and associated
> compatibility options. Introduce new ones now that QEMU 5.1 has been
> released.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  include/hw/boards.h        |  3 +++
>  include/hw/i386/pc.h       |  3 +++
>  hw/arm/virt.c              |  9 ++++++++-
>  hw/core/machine.c          |  4 ++++
>  hw/i386/pc.c               |  4 ++++
>  hw/i386/pc_piix.c          | 14 +++++++++++++-
>  hw/i386/pc_q35.c           | 13 ++++++++++++-
>  hw/ppc/spapr.c             | 15 +++++++++++++--
>  hw/s390x/s390-virtio-ccw.c | 14 +++++++++++++-
>  9 files changed, 73 insertions(+), 6 deletions(-)
> 
> diff --git a/include/hw/boards.h b/include/hw/boards.h
> index 426ce5f625..bc5b82ad20 100644
> --- a/include/hw/boards.h
> +++ b/include/hw/boards.h
> @@ -319,6 +319,9 @@ struct MachineState {
>      } \
>      type_init(machine_initfn##_register_types)
>  
> +extern GlobalProperty hw_compat_5_1[];
> +extern const size_t hw_compat_5_1_len;
> +
>  extern GlobalProperty hw_compat_5_0[];
>  extern const size_t hw_compat_5_0_len;
>  
> diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> index 3d7ed3a55e..fe52e165b2 100644
> --- a/include/hw/i386/pc.h
> +++ b/include/hw/i386/pc.h
> @@ -193,6 +193,9 @@ 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_5_1[];
> +extern const size_t pc_compat_5_1_len;
> +
>  extern GlobalProperty pc_compat_5_0[];
>  extern const size_t pc_compat_5_0_len;
>  
> 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..a6f7e4e8d7 100644
> --- a/hw/core/machine.c
> +++ b/hw/core/machine.c
> @@ -28,6 +28,10 @@
>  #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..4afcf17f99 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -97,6 +97,10 @@
>  #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..9ce1f9c5d6 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_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..4acaad557c 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_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
> @@ -4579,15 +4579,26 @@ 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)
>  {

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