[PATCH v6 15/33] hw/isa/piix3: Create power management controller in host device

[Bernhard Beschow <shentey@gmail.com>]

The power management controller is an integral part of PIIX3 (function
3). So create it as part of the south bridge.

Note that the ACPI function is optional in QEMU. This is why it gets
object_initialize_child()'ed in realize rather than in instance_init.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20221022150508.26830-14-shentey@gmail.com>
---
 include/hw/southbridge/piix.h |  6 ++++++
 hw/i386/pc_piix.c             | 24 ++++++++++++++----------
 hw/isa/piix3.c                | 14 ++++++++++++++
 hw/isa/Kconfig                |  1 +
 4 files changed, 35 insertions(+), 10 deletions(-)

diff --git a/include/hw/southbridge/piix.h b/include/hw/southbridge/piix.h
index 762709f2fd..b1eaab1d95 100644
--- a/include/hw/southbridge/piix.h
+++ b/include/hw/southbridge/piix.h
@@ -14,6 +14,7 @@
 
 #include "hw/pci/pci_device.h"
 #include "qom/object.h"
+#include "hw/acpi/piix4.h"
 #include "hw/rtc/mc146818rtc.h"
 #include "hw/usb/hcd-uhci.h"
 
@@ -56,6 +57,9 @@ struct PIIXState {
 
     RTCState rtc;
     UHCIState uhci;
+    PIIX4PMState pm;
+
+    uint32_t smb_io_base;
 
     /* Reset Control Register contents */
     uint8_t rcr;
@@ -63,7 +67,9 @@ struct PIIXState {
     /* IO memory region for Reset Control Register (PIIX_RCR_IOPORT) */
     MemoryRegion rcr_mem;
 
+    bool has_acpi;
     bool has_usb;
+    bool smm_enabled;
 };
 typedef struct PIIXState PIIX3State;
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 61d8152078..5ea8d4a585 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -46,12 +46,12 @@
 #include "sysemu/kvm.h"
 #include "hw/kvm/clock.h"
 #include "hw/sysbus.h"
+#include "hw/i2c/i2c.h"
 #include "hw/i2c/smbus_eeprom.h"
 #include "hw/xen/xen-x86.h"
 #include "hw/xen/xen.h"
 #include "exec/memory.h"
 #include "hw/acpi/acpi.h"
-#include "hw/acpi/piix4.h"
 #include "qapi/error.h"
 #include "qemu/error-report.h"
 #include "sysemu/xen.h"
@@ -97,6 +97,7 @@ static void pc_init1(MachineState *machine,
     MemoryRegion *system_io = get_system_io();
     PCIBus *pci_bus;
     ISABus *isa_bus;
+    Object *piix4_pm;
     int piix3_devfn = -1;
     qemu_irq smi_irq;
     GSIState *gsi_state;
@@ -237,15 +238,25 @@ static void pc_init1(MachineState *machine,
         pci_dev = pci_new_multifunction(-1, true, type);
         object_property_set_bool(OBJECT(pci_dev), "has-usb",
                                  machine_usb(machine), &error_abort);
+        object_property_set_bool(OBJECT(pci_dev), "has-acpi",
+                                 x86_machine_is_acpi_enabled(x86ms),
+                                 &error_abort);
+        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);
+        object_property_set_bool(OBJECT(pci_dev), "smm-enabled",
+                                 x86_machine_is_smm_enabled(x86ms),
+                                 &error_abort);
         pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
+
         piix3 = PIIX3_PCI_DEVICE(pci_dev);
         piix3->pic = x86ms->gsi;
         piix3_devfn = piix3->dev.devfn;
         isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(piix3), "isa.0"));
         rtc_state = ISA_DEVICE(object_resolve_path_component(OBJECT(pci_dev),
                                                              "rtc"));
+        piix4_pm = object_resolve_path_component(OBJECT(pci_dev), "pm");
     } else {
         pci_bus = NULL;
+        piix4_pm = NULL;
         isa_bus = isa_bus_new(NULL, get_system_memory(), system_io,
                               &error_abort);
 
@@ -315,15 +326,8 @@ static void pc_init1(MachineState *machine,
     }
 #endif
 
-    if (pcmc->pci_enabled && x86_machine_is_acpi_enabled(X86_MACHINE(pcms))) {
-        PCIDevice *piix4_pm;
-
+    if (piix4_pm) {
         smi_irq = qemu_allocate_irq(pc_acpi_smi_interrupt, first_cpu, 0);
-        piix4_pm = pci_new(piix3_devfn + 3, TYPE_PIIX4_PM);
-        qdev_prop_set_uint32(DEVICE(piix4_pm), "smb_io_base", 0xb100);
-        qdev_prop_set_bit(DEVICE(piix4_pm), "smm-enabled",
-                          x86_machine_is_smm_enabled(x86ms));
-        pci_realize_and_unref(piix4_pm, pci_bus, &error_fatal);
 
         qdev_connect_gpio_out(DEVICE(piix4_pm), 0, x86ms->gsi[9]);
         qdev_connect_gpio_out_named(DEVICE(piix4_pm), "smi-irq", 0, smi_irq);
@@ -337,7 +341,7 @@ static void pc_init1(MachineState *machine,
                                  object_property_allow_set_link,
                                  OBJ_PROP_LINK_STRONG);
         object_property_set_link(OBJECT(machine), PC_MACHINE_ACPI_DEVICE_PROP,
-                                 OBJECT(piix4_pm), &error_abort);
+                                 piix4_pm, &error_abort);
     }
 
     if (machine->nvdimms_state->is_enabled) {
diff --git a/hw/isa/piix3.c b/hw/isa/piix3.c
index 45c20dea17..ed7d58bc98 100644
--- a/hw/isa/piix3.c
+++ b/hw/isa/piix3.c
@@ -319,6 +319,17 @@ static void pci_piix3_realize(PCIDevice *dev, Error **errp)
             return;
         }
     }
+
+    /* Power Management */
+    if (d->has_acpi) {
+        object_initialize_child(OBJECT(d), "pm", &d->pm, TYPE_PIIX4_PM);
+        qdev_prop_set_int32(DEVICE(&d->pm), "addr", dev->devfn + 3);
+        qdev_prop_set_uint32(DEVICE(&d->pm), "smb_io_base", d->smb_io_base);
+        qdev_prop_set_bit(DEVICE(&d->pm), "smm-enabled", d->smm_enabled);
+        if (!qdev_realize(DEVICE(&d->pm), BUS(pci_bus), errp)) {
+            return;
+        }
+    }
 }
 
 static void build_pci_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
@@ -353,7 +364,10 @@ static void pci_piix3_init(Object *obj)
 }
 
 static Property pci_piix3_props[] = {
+    DEFINE_PROP_UINT32("smb_io_base", PIIX3State, smb_io_base, 0),
+    DEFINE_PROP_BOOL("has-acpi", PIIX3State, has_acpi, true),
     DEFINE_PROP_BOOL("has-usb", PIIX3State, has_usb, true),
+    DEFINE_PROP_BOOL("smm-enabled", PIIX3State, smm_enabled, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/isa/Kconfig b/hw/isa/Kconfig
index f01bc0dff3..cf79580384 100644
--- a/hw/isa/Kconfig
+++ b/hw/isa/Kconfig
@@ -33,6 +33,7 @@ config PC87312
 
 config PIIX3
     bool
+    select ACPI_PIIX4
     select I8257
     select ISA_BUS
     select MC146818RTC
-- 
2.39.0