[RFC PATCH-for-9.1 05/29] hw/i386/pc: Remove PCMachineClass::pci_enabled field

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

All TYPE_PC_PCI_MACHINE-based machines have pci_enabled
set to %true. By checking a TYPE_PC_MACHINE inherits the
TYPE_PC_PCI_MACHINE base class, we don't need this field
anymore.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/i386/pc.h | 1 -
 hw/i386/pc.c         | 3 +--
 hw/i386/pc_piix.c    | 1 -
 3 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 1a4a61148a..0b23e5ec7b 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -87,7 +87,6 @@ typedef struct PCMachineClass {
     X86MachineClass parent_class;
 
     /* Device configuration: */
-    bool pci_enabled;
     const char *default_south_bridge;
 
     /* Compat options: */
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index eafd521489..a16bb1554c 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1740,7 +1740,6 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     PCMachineClass *pcmc = PC_MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 
-    pcmc->pci_enabled = true;
     pcmc->has_acpi_build = true;
     pcmc->smbios_defaults = true;
     pcmc->gigabyte_align = true;
@@ -1830,7 +1829,7 @@ 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;
+    return !!object_dynamic_cast(OBJECT(pcms), TYPE_PC_PCI_MACHINE);
 }
 
 static const TypeInfo pc_machine_types[] = {
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 7ada452f91..776d02db73 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -813,7 +813,6 @@ static void isapc_machine_options(MachineClass *m)
     m->max_cpus = 1;
     m->option_rom_has_mr = true;
     m->rom_file_has_mr = false;
-    pcmc->pci_enabled = false;
     pcmc->has_acpi_build = false;
     pcmc->smbios_defaults = false;
     pcmc->gigabyte_align = false;
-- 
2.41.0