[PATCH 04/14] ppc/pnv: Introduce support for user created PHB3 devices

[Cédric Le Goater]

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.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/ppc/pnv.h   |  2 ++
 hw/pci-host/pnv_phb3.c | 11 ++++++++++-
 hw/ppc/pnv.c           | 23 ++++++++++++++++++-----
 3 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
index 6f498c8f1b5f..0710673a7fd8 100644
--- a/include/hw/ppc/pnv.h
+++ b/include/hw/ppc/pnv.h
@@ -215,6 +215,8 @@ struct PnvMachineState {
     hwaddr       fw_load_addr;
 };
 
+PnvChip *pnv_get_chip(PnvMachineState *pnv, uint32_t chip_id);
+
 #define PNV_FDT_ADDR          0x01000000
 #define PNV_TIMEBASE_FREQ     512000000ULL
 
diff --git a/hw/pci-host/pnv_phb3.c b/hw/pci-host/pnv_phb3.c
index 3aa42ef9d4b9..dd1cf37288a0 100644
--- a/hw/pci-host/pnv_phb3.c
+++ b/hw/pci-host/pnv_phb3.c
@@ -998,6 +998,15 @@ static void pnv_phb3_realize(DeviceState *dev, Error 
**errp)
         return;
     }
 
+    /* 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;
+        }
+    }
+
     /* LSI sources */
     object_property_set_link(OBJECT(&phb->lsis), "xics", OBJECT(pnv),
                              &error_abort);
@@ -1105,7 +1114,7 @@ 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 = {
diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index de277c457838..d7fe92cb082d 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -1097,14 +1097,14 @@ static void pnv_chip_power8_instance_init(Object *obj)
 
     object_initialize_child(obj, "homer", &chip8->homer, TYPE_PNV8_HOMER);
 
-    for (i = 0; i < pcc->num_phbs; i++) {
+    if (defaults_enabled()) {
+        chip->num_phbs = pcc->num_phbs;
+    }
+
+    for (i = 0; i < chip->num_phbs; i++) {
         object_initialize_child(obj, "phb[*]", &chip8->phbs[i], TYPE_PNV_PHB3);
     }
 
-    /*
-     * Number of PHBs is the chip default
-     */
-    chip->num_phbs = pcc->num_phbs;
 }
 
 static void pnv_chip_icp_realize(Pnv8Chip *chip8, Error **errp)
@@ -1784,6 +1784,19 @@ PowerPCCPU *pnv_chip_find_cpu(PnvChip *chip, uint32_t 
pir)
     return NULL;
 }
 
+PnvChip *pnv_get_chip(PnvMachineState *pnv, uint32_t chip_id)
+{
+    int i;
+
+    for (i = 0; i < pnv->num_chips; i++) {
+        PnvChip *chip = pnv->chips[i];
+        if (chip->chip_id == chip_id) {
+            return chip;
+        }
+    }
+    return NULL;
+}
+
 static ICSState *pnv_ics_get(XICSFabric *xi, int irq)
 {
     PnvMachineState *pnv = PNV_MACHINE(xi);
-- 
2.31.1