[RFC PATCH-for-9.1 04/29] hw/i386/pc: Introduce PC_PCI_MACHINE QOM type

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

Introduce TYPE_PC_PCI_MACHINE for machines where PCI
is expected (as opposition to the ISA-only PC machine).

This type inherits from the well known TYPE_PC_MACHINE.

Convert I440FX/PIIX and Q35 machines to use it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
---
 include/hw/i386/pc.h | 25 ++++++++++++++++---------
 hw/i386/pc.c         | 25 +++++++++++++++++++++++++
 hw/i386/pc_piix.c    |  6 +++---
 hw/i386/pc_q35.c     |  2 +-
 4 files changed, 45 insertions(+), 13 deletions(-)

diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 33023ebbbe..1a4a61148a 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -22,11 +22,8 @@
  * @boot_cpus: number of present VCPUs
  */
 typedef struct PCMachineState {
-    /*< private >*/
     X86MachineState parent_obj;
 
-    /* <public> */
-
     /* State for other subsystems/APIs: */
     Notifier machine_done;
 
@@ -60,6 +57,12 @@ typedef struct PCMachineState {
     CXLState cxl_devices_state;
 } PCMachineState;
 
+typedef struct PcPciMachineState {
+    PCMachineState parent_obj;
+
+    Notifier machine_done;
+} PcPciMachineState;
+
 #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
 #define PC_MACHINE_MAX_RAM_BELOW_4G "max-ram-below-4g"
 #define PC_MACHINE_VMPORT           "vmport"
@@ -80,12 +83,9 @@ typedef struct PCMachineState {
  *                  way we can use 1GByte pages in the host.
  *
  */
-struct PCMachineClass {
-    /*< private >*/
+typedef struct PCMachineClass {
     X86MachineClass parent_class;
 
-    /*< public >*/
-
     /* Device configuration: */
     bool pci_enabled;
     const char *default_south_bridge;
@@ -124,13 +124,20 @@ struct PCMachineClass {
      * check for memory.
      */
     bool broken_32bit_mem_addr_check;
-};
+} PCMachineClass;
 
-#define TYPE_PC_MACHINE "generic-pc-machine"
+typedef struct PcPciMachineClass {
+    PCMachineClass parent_class;
+} PcPciMachineClass;
+
+#define TYPE_PC_MACHINE "common-pc-machine"
 OBJECT_DECLARE_TYPE(PCMachineState, PCMachineClass, PC_MACHINE)
 
 bool pc_machine_is_pci_enabled(PCMachineState *pcms);
 
+#define TYPE_PC_PCI_MACHINE "pci-pc-machine"
+OBJECT_DECLARE_TYPE(PcPciMachineState, PcPciMachineClass, PC_PCI_MACHINE)
+
 /* ioapic.c */
 
 GSIState *pc_gsi_create(qemu_irq **irqs, bool pci_enabled);
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 7065f11e97..eafd521489 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -621,6 +621,10 @@ void pc_machine_done(Notifier *notifier, void *data)
     pc_cmos_init_late(pcms);
 }
 
+static void pc_pci_machine_done(Notifier *notifier, void *data)
+{
+}
+
 /* setup pci memory address space mapping into system address space */
 void pc_pci_as_mapping_init(MemoryRegion *system_memory,
                             MemoryRegion *pci_address_space)
@@ -1678,6 +1682,14 @@ static void pc_machine_initfn(Object *obj)
     qemu_add_machine_init_done_notifier(&pcms->machine_done);
 }
 
+static void pc_pci_machine_initfn(Object *obj)
+{
+    PcPciMachineState *ppms = PC_PCI_MACHINE(obj);
+
+    ppms->machine_done.notify = pc_pci_machine_done;
+    qemu_add_machine_init_done_notifier(&ppms->machine_done);
+}
+
 static void pc_machine_reset(MachineState *machine, ShutdownCause reason)
 {
     CPUState *cs;
@@ -1812,6 +1824,10 @@ static void pc_machine_class_init(ObjectClass *oc, void 
*data)
         pc_machine_set_fd_bootchk);
 }
 
+static void pc_pci_machine_class_init(ObjectClass *oc, void *data)
+{
+}
+
 bool pc_machine_is_pci_enabled(PCMachineState *pcms)
 {
     return PC_MACHINE_GET_CLASS(pcms)->pci_enabled;
@@ -1831,6 +1847,15 @@ static const TypeInfo pc_machine_types[] = {
              { }
         },
     },
+    {
+        .name           = TYPE_PC_PCI_MACHINE,
+        .parent         = TYPE_PC_MACHINE,
+        .abstract       = true,
+        .instance_size  = sizeof(PcPciMachineState),
+        .instance_init  = pc_pci_machine_initfn,
+        .class_size     = sizeof(PcPciMachineClass),
+        .class_init     = pc_pci_machine_class_init,
+    },
 };
 
 DEFINE_TYPES(pc_machine_types)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index b9f85148e3..7ada452f91 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -463,7 +463,7 @@ static void pc_xen_hvm_init(MachineState *machine)
         pc_init1(machine, TYPE_I440FX_PCI_DEVICE); \
     } \
     DEFINE_PC_MACHINE(suffix, name, pc_init_##suffix, optionfn, \
-                      TYPE_PC_MACHINE)
+                      TYPE_PC_PCI_MACHINE)
 
 static void pc_i440fx_machine_options(MachineClass *m)
 {
@@ -838,7 +838,7 @@ static void xenfv_4_2_machine_options(MachineClass *m)
 }
 
 DEFINE_PC_MACHINE(xenfv_4_2, "xenfv-4.2", pc_xen_hvm_init,
-                  xenfv_4_2_machine_options, TYPE_PC_MACHINE);
+                  xenfv_4_2_machine_options, TYPE_PC_PCI_MACHINE);
 
 static void xenfv_3_1_machine_options(MachineClass *m)
 {
@@ -850,5 +850,5 @@ static void xenfv_3_1_machine_options(MachineClass *m)
 }
 
 DEFINE_PC_MACHINE(xenfv, "xenfv-3.1", pc_xen_hvm_init,
-                  xenfv_3_1_machine_options, TYPE_PC_MACHINE);
+                  xenfv_3_1_machine_options, TYPE_PC_PCI_MACHINE);
 #endif
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 7dbee38f03..c3b0467ef3 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -339,7 +339,7 @@ static void pc_q35_init(MachineState *machine)
         pc_q35_init(machine); \
     } \
     DEFINE_PC_MACHINE(suffix, name, pc_init_##suffix, optionfn, \
-                      TYPE_PC_MACHINE)
+                      TYPE_PC_PCI_MACHINE)
 
 
 static void pc_q35_machine_options(MachineClass *m)
-- 
2.41.0