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, 18 insertions, 5 deletions

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 3a263f631a..ad02d56aa7 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -1117,14 +1117,14 @@ 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)
@@ -1814,6 +1814,19 @@ static ICSState *pnv_ics_get(XICSFabric *xi, int irq)
     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 int pnv_ics_resend_child(Object *child, void *opaque)
 {
     PnvPHB3 *phb3 = (PnvPHB3 *) object_dynamic_cast(child, TYPE_PNV_PHB3);