ppc/pnv: Attach PHB3 root port device when defaults are enabled

This cleanups the PHB3 model a bit more since the root port is an
independent device and it will ease our task when adding user created
PHB3s.

pnv_phb_attach_root_port() is made public in pnv.c so it can be reused
with the pnv_phb4 root port later.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220105212338.49899-4-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

hw/pci-host/pnv_phb3.c

@@ -19,6 +19,7 @@
 #include "hw/irq.h"
 #include "hw/qdev-properties.h"
 #include "qom/object.h"
+#include "sysemu/sysemu.h"
 
 #define phb3_error(phb, fmt, ...)                                       \
     qemu_log_mask(LOG_GUEST_ERROR, "phb3[%d:%d]: " fmt "\n",            \
@@ -981,10 +982,6 @@ static void pnv_phb3_instance_init(Object *obj)
     /* Power Bus Common Queue */
     object_initialize_child(obj, "pbcq", &phb->pbcq, TYPE_PNV_PBCQ);
 
-    /* Root Port */
-    object_initialize_child(obj, "root", &phb->root, TYPE_PNV_PHB3_ROOT_PORT);
-    qdev_prop_set_int32(DEVICE(&phb->root), "addr", PCI_DEVFN(0, 0));
-    qdev_prop_set_bit(DEVICE(&phb->root), "multifunction", false);
 }
 
 static void pnv_phb3_realize(DeviceState *dev, Error **errp)
@@ -1053,10 +1050,10 @@ static void pnv_phb3_realize(DeviceState *dev, Error **errp)
 
     pci_setup_iommu(pci->bus, pnv_phb3_dma_iommu, phb);
 
-    /* Add a single Root port */
-    qdev_prop_set_uint8(DEVICE(&phb->root), "chassis", phb->chip_id);
-    qdev_prop_set_uint16(DEVICE(&phb->root), "slot", phb->phb_id);
-    qdev_realize(DEVICE(&phb->root), BUS(pci->bus), &error_fatal);
+    if (defaults_enabled()) {
+        pnv_phb_attach_root_port(PCI_HOST_BRIDGE(phb),
+                                 TYPE_PNV_PHB3_ROOT_PORT);
+    }
 }
 
 void pnv_phb3_update_regions(PnvPHB3 *phb)
@@ -1177,7 +1174,7 @@ static void pnv_phb3_root_port_class_init(ObjectClass *klass, void *data)
 
     device_class_set_parent_realize(dc, pnv_phb3_root_port_realize,
                                     &rpc->parent_realize);
-    dc->user_creatable = false;
+    dc->user_creatable = true;
 
     k->vendor_id = PCI_VENDOR_ID_IBM;
     k->device_id = 0x03dc;

hw/ppc/pnv.c

@@ -1156,6 +1156,14 @@ static void pnv_chip_icp_realize(Pnv8Chip *chip8, Error **errp)
     }
 }
 
+/* Attach a root port device */
+void pnv_phb_attach_root_port(PCIHostState *pci, const char *name)
+{
+    PCIDevice *root = pci_new(PCI_DEVFN(0, 0), name);
+
+    pci_realize_and_unref(root, pci->bus, &error_fatal);
+}
+
 static void pnv_chip_power8_realize(DeviceState *dev, Error **errp)
 {
     PnvChipClass *pcc = PNV_CHIP_GET_CLASS(dev);

include/hw/pci-host/pnv_phb3.h

@@ -155,8 +155,6 @@ struct PnvPHB3 {
 
     PnvPBCQState pbcq;
 
-    PnvPHB3RootPort root;
-
     QLIST_HEAD(, PnvPhb3DMASpace) dma_spaces;
 
     PnvChip *chip;

include/hw/ppc/pnv.h

@@ -177,6 +177,7 @@ DECLARE_INSTANCE_CHECKER(PnvChip, PNV_CHIP_POWER10,
                          TYPE_PNV_CHIP_POWER10)
 
 PowerPCCPU *pnv_chip_find_cpu(PnvChip *chip, uint32_t pir);
+void pnv_phb_attach_root_port(PCIHostState *pci, const char *name);
 
 #define TYPE_PNV_MACHINE       MACHINE_TYPE_NAME("powernv")
 typedef struct PnvMachineClass PnvMachineClass;