acpi: pci: move out ACPI PCI hotplug generator from generic slot generator build_append_pci_bus_devices()

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230302161543.286002-33-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/acpi/pci-bridge.c

@@ -22,6 +22,16 @@ void build_pci_bridge_aml(AcpiDevAmlIf *adev, Aml *scope)
     PCIBridge *br = PCI_BRIDGE(adev);
 
     if (!DEVICE(br)->hotplugged) {
-        build_append_pci_bus_devices(scope, pci_bridge_get_sec_bus(br));
+        PCIBus *sec_bus = pci_bridge_get_sec_bus(br);
+
+        build_append_pci_bus_devices(scope, sec_bus);
+
+        /*
+         * generate hotplug slots descriptors if
+         * bridge has ACPI PCI hotplug attached,
+         */
+        if (object_property_find(OBJECT(sec_bus), ACPI_PCIHP_PROP_BSEL)) {
+            build_append_pcihp_slots(scope, sec_bus);
+        }
     }
 }

hw/i386/acpi-build.c

@@ -520,7 +520,7 @@ static bool is_devfn_ignored_hotplug(const int devfn, const PCIBus *bus)
     return false;
 }
 
-static void build_append_pcihp_slots(Aml *parent_scope, PCIBus *bus)
+void build_append_pcihp_slots(Aml *parent_scope, PCIBus *bus)
 {
     int devfn;
     Aml *dev, *notify_method = NULL, *method;
@@ -599,10 +599,6 @@ void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus)
         /* device descriptor has been composed, add it into parent context */
         aml_append(parent_scope, dev);
     }
-
-    if (object_property_find(OBJECT(bus), ACPI_PCIHP_PROP_BSEL)) {
-        build_append_pcihp_slots(parent_scope, bus);
-    }
 }
 
 static bool build_append_notfication_callback(Aml *parent_scope,
@@ -1790,6 +1786,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
             Aml *scope = aml_scope("PCI0");
             /* Scan all PCI buses. Generate tables to support hotplug. */
             build_append_pci_bus_devices(scope, bus);
+            if (object_property_find(OBJECT(bus), ACPI_PCIHP_PROP_BSEL)) {
+                build_append_pcihp_slots(scope, bus);
+            }
             aml_append(sb_scope, scope);
         }
     }

include/hw/acpi/pcihp.h

@@ -71,6 +71,8 @@ void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev,
 /* Called on reset */
 void acpi_pcihp_reset(AcpiPciHpState *s, bool acpihp_root_off);
 
+void build_append_pcihp_slots(Aml *parent_scope, PCIBus *bus);
+
 extern const VMStateDescription vmstate_acpi_pcihp_pci_status;
 
 #define VMSTATE_PCI_HOTPLUG(pcihp, state, test_pcihp, test_acpi_index) \