[PATCH 20/32] hw/isa/piix4: Make PIIX4's ACPI and USB functions optional

[Bernhard Beschow]

This aligns PIIX4 with PIIX3.

Signed-off-by: Bernhard Beschow <shen...@gmail.com>
Message-Id: <20221022150508.26830-30-shen...@gmail.com>
---
 hw/isa/piix4.c  | 44 ++++++++++++++++++++++++++++++++------------
 hw/mips/malta.c |  6 ++++--
 2 files changed, 36 insertions(+), 14 deletions(-)

diff --git a/hw/isa/piix4.c b/hw/isa/piix4.c
index aceb21ee3e..24d943c609 100644
--- a/hw/isa/piix4.c
+++ b/hw/isa/piix4.c
@@ -51,9 +51,16 @@ struct PIIX4State {
     PCIIDEState ide;
     UHCIState uhci;
     PIIX4PMState pm;
+
+    uint32_t smb_io_base;
+
     /* Reset Control Register */
     MemoryRegion rcr_mem;
     uint8_t rcr;
+
+    bool has_acpi;
+    bool has_usb;
+    bool smm_enabled;
 };
 
 OBJECT_DECLARE_SIMPLE_TYPE(PIIX4State, PIIX4_PCI_DEVICE)
@@ -259,17 +266,26 @@ static void piix4_realize(PCIDevice *dev, Error **errp)
     }
 
     /* USB */
-    qdev_prop_set_int32(DEVICE(&s->uhci), "addr", dev->devfn + 2);
-    if (!qdev_realize(DEVICE(&s->uhci), BUS(pci_bus), errp)) {
-        return;
+    if (s->has_usb) {
+        object_initialize_child(OBJECT(dev), "uhci", &s->uhci,
+                                TYPE_PIIX4_USB_UHCI);
+        qdev_prop_set_int32(DEVICE(&s->uhci), "addr", dev->devfn + 2);
+        if (!qdev_realize(DEVICE(&s->uhci), BUS(pci_bus), errp)) {
+            return;
+        }
     }
 
     /* ACPI controller */
-    qdev_prop_set_int32(DEVICE(&s->pm), "addr", dev->devfn + 3);
-    if (!qdev_realize(DEVICE(&s->pm), BUS(pci_bus), errp)) {
-        return;
+    if (s->has_acpi) {
+        object_initialize_child(OBJECT(s), "pm", &s->pm, TYPE_PIIX4_PM);
+        qdev_prop_set_int32(DEVICE(&s->pm), "addr", dev->devfn + 3);
+        qdev_prop_set_uint32(DEVICE(&s->pm), "smb_io_base", s->smb_io_base);
+        qdev_prop_set_bit(DEVICE(&s->pm), "smm-enabled", s->smm_enabled);
+        if (!qdev_realize(DEVICE(&s->pm), BUS(pci_bus), errp)) {
+            return;
+        }
+        qdev_connect_gpio_out(DEVICE(&s->pm), 0, s->isa[9]);
     }
-    qdev_connect_gpio_out(DEVICE(&s->pm), 0, s->isa[9]);
 
     pci_bus_irqs(pci_bus, piix4_set_irq, pci_slot_get_pirq, s, PIIX_NUM_PIRQS);
 }
@@ -280,13 +296,16 @@ static void piix4_init(Object *obj)
 
     object_initialize_child(obj, "rtc", &s->rtc, TYPE_MC146818_RTC);
     object_initialize_child(obj, "ide", &s->ide, TYPE_PIIX4_IDE);
-    object_initialize_child(obj, "uhci", &s->uhci, TYPE_PIIX4_USB_UHCI);
-
-    object_initialize_child(obj, "pm", &s->pm, TYPE_PIIX4_PM);
-    qdev_prop_set_uint32(DEVICE(&s->pm), "smb_io_base", 0x1100);
-    qdev_prop_set_bit(DEVICE(&s->pm), "smm-enabled", 0);
 }
 
+static Property piix4_props[] = {
+    DEFINE_PROP_UINT32("smb_io_base", PIIX4State, smb_io_base, 0),
+    DEFINE_PROP_BOOL("has-acpi", PIIX4State, has_acpi, true),
+    DEFINE_PROP_BOOL("has-usb", PIIX4State, has_usb, true),
+    DEFINE_PROP_BOOL("smm-enabled", PIIX4State, smm_enabled, false),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void piix4_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -305,6 +324,7 @@ static void piix4_class_init(ObjectClass *klass, void *data)
      */
     dc->user_creatable = false;
     dc->hotpluggable = false;
+    device_class_set_props(dc, piix4_props);
 }
 
 static const TypeInfo piix4_info = {
diff --git a/hw/mips/malta.c b/hw/mips/malta.c
index c3dcd43f37..4d0251ee12 100644
--- a/hw/mips/malta.c
+++ b/hw/mips/malta.c
@@ -1422,8 +1422,10 @@ void mips_malta_init(MachineState *machine)
     empty_slot_init("GT64120", 0, 0x20000000);
 
     /* Southbridge */
-    piix4 = pci_create_simple_multifunction(pci_bus, PIIX4_PCI_DEVFN, true,
-                                            TYPE_PIIX4_PCI_DEVICE);
+    piix4 = pci_new_multifunction(PIIX4_PCI_DEVFN, true,
+                                  TYPE_PIIX4_PCI_DEVICE);
+    qdev_prop_set_uint32(DEVICE(piix4), "smb_io_base", 0x1100);
+    pci_realize_and_unref(piix4, pci_bus, &error_fatal);
     isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(piix4), "isa.0"));
 
     dev = DEVICE(object_resolve_path_component(OBJECT(piix4), "ide"));
-- 
2.38.1