[PATCH 3/3] hw/acpi/cpu_hotplug: Convert 'Object *device' -> 'DeviceState *parent'

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

ACPI CPU hotplug parent can't be any QOM object, it must be a QDev.
Convert AcpiCpuHotplug::device field as QDev to enforce this.
Rename 'owner' and 'device' variables as 'parent'.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/acpi/acpi-cpu-hotplug-stub.c |  2 +-
 hw/acpi/cpu_hotplug.c           | 18 +++++++++---------
 hw/acpi/ich9.c                  |  5 +++--
 hw/acpi/piix4.c                 |  2 +-
 include/hw/acpi/cpu_hotplug.h   |  4 ++--
 5 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/hw/acpi/acpi-cpu-hotplug-stub.c b/hw/acpi/acpi-cpu-hotplug-stub.c
index cbd7a6ec00..0fcc1ec8ea 100644
--- a/hw/acpi/acpi-cpu-hotplug-stub.c
+++ b/hw/acpi/acpi-cpu-hotplug-stub.c
@@ -13,7 +13,7 @@ void acpi_switch_to_modern_cphp(AcpiCpuHotplug *gpe,
     return;
 }
 
-void legacy_acpi_cpu_hotplug_init(MemoryRegion *container, Object *owner,
+void legacy_acpi_cpu_hotplug_init(MemoryRegion *container, DeviceState *parent,
                                   AcpiCpuHotplug *gpe, uint16_t base)
 {
     return;
diff --git a/hw/acpi/cpu_hotplug.c b/hw/acpi/cpu_hotplug.c
index 636e985c50..b8c9081738 100644
--- a/hw/acpi/cpu_hotplug.c
+++ b/hw/acpi/cpu_hotplug.c
@@ -41,8 +41,8 @@ static void cpu_status_write(void *opaque, hwaddr addr, uint64_t data,
      */
     if (addr == 0 && data == 0) {
         AcpiCpuHotplug *gpe = opaque;
-        object_property_set_bool(gpe->device, "cpu-hotplug-legacy", false,
-                                 &error_abort);
+        object_property_set_bool(OBJECT(gpe->parent), "cpu-hotplug-legacy",
+                                 false, &error_abort);
     }
 }
 
@@ -66,8 +66,8 @@ static void acpi_set_cpu_present_bit(AcpiCpuHotplug *gpe, CPUState *cpu)
 
     cpu_id = k->get_arch_id(cpu);
     if ((cpu_id / 8) >= ACPI_GPE_PROC_LEN) {
-        object_property_set_bool(gpe->device, "cpu-hotplug-legacy", false,
-                                 &error_abort);
+        object_property_set_bool(OBJECT(gpe->parent), "cpu-hotplug-legacy",
+                                 false, &error_abort);
         return;
     }
 
@@ -81,15 +81,15 @@ void legacy_acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, AcpiCpuHotplug *gpe,
     acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
 }
 
-void legacy_acpi_cpu_hotplug_init(MemoryRegion *container, Object *owner,
+void legacy_acpi_cpu_hotplug_init(MemoryRegion *container, DeviceState *parent,
                                   AcpiCpuHotplug *gpe, uint16_t base)
 {
     CPUState *cpu;
 
-    memory_region_init_io(&gpe->io, owner, &AcpiCpuHotplug_ops,
+    memory_region_init_io(&gpe->io, OBJECT(parent), &AcpiCpuHotplug_ops,
                           gpe, "acpi-cpu-hotplug", ACPI_GPE_PROC_LEN);
     memory_region_add_subregion(container, base, &gpe->io);
-    gpe->device = owner;
+    gpe->parent = parent;
 
     CPU_FOREACH(cpu) {
         acpi_set_cpu_present_bit(gpe, cpu);
@@ -100,10 +100,10 @@ void acpi_switch_to_modern_cphp(AcpiCpuHotplug *gpe,
                                 CPUHotplugState *cpuhp_state,
                                 uint16_t io_port)
 {
-    MemoryRegion *container = pci_address_space_io(PCI_DEVICE(gpe->device));
+    MemoryRegion *container = pci_address_space_io(PCI_DEVICE(gpe->parent));
 
     memory_region_del_subregion(container, &gpe->io);
-    cpu_hotplug_hw_init(container, gpe->device, cpuhp_state, io_port);
+    cpu_hotplug_hw_init(container, OBJECT(gpe->parent), cpuhp_state, io_port);
 }
 
 void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState *machine,
diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index 4f8385b894..6c9a737479 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -197,7 +197,7 @@ static bool vmstate_test_use_cpuhp(void *opaque)
 static int vmstate_cpuhp_pre_load(void *opaque)
 {
     ICH9LPCPMRegs *s = opaque;
-    Object *obj = OBJECT(s->gpe.device);
+    Object *obj = OBJECT(s->gpe.parent);
     object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort);
     return 0;
 }
@@ -338,7 +338,8 @@ void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
     qemu_register_powerdown_notifier(&pm->powerdown_notifier);
 
     legacy_acpi_cpu_hotplug_init(pci_address_space_io(lpc_pci),
-        OBJECT(lpc_pci), &pm->gpe, ICH9_CPU_HOTPLUG_IO_BASE);
+                                 DEVICE(lpc_pci), &pm->gpe,
+                                 ICH9_CPU_HOTPLUG_IO_BASE);
 
     if (pm->acpi_memory_hotplug.is_enabled) {
         acpi_memory_hotplug_init(pci_address_space_io(lpc_pci), OBJECT(lpc_pci),
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 5595fe5be5..3a61d89f92 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -571,7 +571,7 @@ static void piix4_acpi_system_hot_add_init(MemoryRegion *container,
     object_property_add_bool(OBJECT(s), "cpu-hotplug-legacy",
                              piix4_get_cpu_hotplug_legacy,
                              piix4_set_cpu_hotplug_legacy);
-    legacy_acpi_cpu_hotplug_init(container, OBJECT(s), &s->gpe,
+    legacy_acpi_cpu_hotplug_init(container, DEVICE(s), &s->gpe,
                                  PIIX4_CPU_HOTPLUG_IO_BASE);
 
     if (s->acpi_memory_hotplug.is_enabled) {
diff --git a/include/hw/acpi/cpu_hotplug.h b/include/hw/acpi/cpu_hotplug.h
index 5ff24ec417..b2f990f0b8 100644
--- a/include/hw/acpi/cpu_hotplug.h
+++ b/include/hw/acpi/cpu_hotplug.h
@@ -20,7 +20,7 @@
 #include "hw/acpi/cpu.h"
 
 typedef struct AcpiCpuHotplug {
-    Object *device;
+    DeviceState *parent;
     MemoryRegion io;
     uint8_t sts[ACPI_GPE_PROC_LEN];
 } AcpiCpuHotplug;
@@ -28,7 +28,7 @@ typedef struct AcpiCpuHotplug {
 void legacy_acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, AcpiCpuHotplug *gpe,
                              DeviceState *dev, Error **errp);
 
-void legacy_acpi_cpu_hotplug_init(MemoryRegion *container, Object *owner,
+void legacy_acpi_cpu_hotplug_init(MemoryRegion *container, DeviceState *parent,
                                   AcpiCpuHotplug *gpe, uint16_t base);
 
 void acpi_switch_to_modern_cphp(AcpiCpuHotplug *gpe,
-- 
2.38.1