ppc/pnv: Introduce support for user created PHB3 devices

PHB3 devices and PCI devices can now be added to the powernv8 machine
using :

  -device pnv-phb3,chip-id=0,index=1 \
  -device nec-usb-xhci,bus=pci.1,addr=0x0

The 'index' property identifies the PHB3 in the chip. In case of user
created devices, a lookup on 'chip-id' is required to assign the
owning chip.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220105212338.49899-7-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/hw/pci-host/pnv_phb3.c b/hw/pci-host/pnv_phb3.c
index fdc8d0b..1ebe43d 100644
--- a/hw/pci-host/pnv_phb3.c
+++ b/hw/pci-host/pnv_phb3.c
@@ -991,6 +991,15 @@ static void pnv_phb3_realize(DeviceState *dev, Error **errp)
     PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine());
     int i;
 
+    /* User created devices */
+    if (!phb->chip) {
+        phb->chip = pnv_get_chip(pnv, phb->chip_id);
+        if (!phb->chip) {
+            error_setg(errp, "invalid chip id: %d", phb->chip_id);
+            return;
+        }
+    }
+
     if (phb->phb_id >= PNV_CHIP_GET_CLASS(phb->chip)->num_phbs) {
         error_setg(errp, "invalid PHB index: %d", phb->phb_id);
         return;
@@ -1104,7 +1113,7 @@ static void pnv_phb3_class_init(ObjectClass *klass, void *data)
     dc->realize = pnv_phb3_realize;
     device_class_set_props(dc, pnv_phb3_properties);
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
-    dc->user_creatable = false;
+    dc->user_creatable = true;
 }
 
 static const TypeInfo pnv_phb3_type_info = {