ppc/pnv: Reparent user created PHB3 devices to the PnvChip

The powernv machine uses the object hierarchy to populate the device
tree and each device should be parented to the chip it belongs to.
This is not the case for user created devices which are parented to
the container "/unattached".

Make sure a PHB3 device is parented to its chip by reparenting the
object if necessary.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220105212338.49899-8-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

diff --git a/hw/pci-host/pnv_phb3.c b/hw/pci-host/pnv_phb3.c
index 1ebe43df5dd12f7338570513221e256be71f6bc7..a52aedcad31b72b2032bdbf55fdeff3fd7b273c6 100644 (file)
--- a/hw/pci-host/pnv_phb3.c
+++ b/hw/pci-host/pnv_phb3.c
@@ -998,6 +998,12 @@ static void pnv_phb3_realize(DeviceState *dev, Error **errp)
             error_setg(errp, "invalid chip id: %d", phb->chip_id);
             return;
         }
+
+        /*
+         * Reparent user created devices to the chip to build
+         * correctly the device tree.
+         */
+        pnv_chip_parent_fixup(phb->chip, OBJECT(phb), phb->phb_id);
     }
 
     if (phb->phb_id >= PNV_CHIP_GET_CLASS(phb->chip)->num_phbs) {

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index ad02d56aa75e32a669822a9e0922bd46288efd6c..fa5e7bc751927b5958eb267d1295c763da0e261c 100644 (file)
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -1814,6 +1814,23 @@ static ICSState *pnv_ics_get(XICSFabric *xi, int irq)
     return NULL;
 }
 
+void pnv_chip_parent_fixup(PnvChip *chip, Object *obj, int index)
+{
+    Object *parent = OBJECT(chip);
+    g_autofree char *default_id =
+        g_strdup_printf("%s[%d]", object_get_typename(obj), index);
+
+    if (obj->parent == parent) {
+        return;
+    }
+
+    object_ref(obj);
+    object_unparent(obj);
+    object_property_add_child(
+        parent, DEVICE(obj)->id ? DEVICE(obj)->id : default_id, obj);
+    object_unref(obj);
+}
+
 PnvChip *pnv_get_chip(PnvMachineState *pnv, uint32_t chip_id)
 {
     int i;

diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
index 64bab7112be3b979cc702abf1af8acd43fd1e4a1..f4219da7c516d6c50efeaba4dbe232f9f6e43568 100644 (file)
--- a/include/hw/ppc/pnv.h
+++ b/include/hw/ppc/pnv.h
@@ -178,6 +178,7 @@ DECLARE_INSTANCE_CHECKER(PnvChip, PNV_CHIP_POWER10,
 
 PowerPCCPU *pnv_chip_find_cpu(PnvChip *chip, uint32_t pir);
 void pnv_phb_attach_root_port(PCIHostState *pci, const char *name);
+void pnv_chip_parent_fixup(PnvChip *chip, Object *obj, int index);
 
 #define TYPE_PNV_MACHINE       MACHINE_TYPE_NAME("powernv")
 typedef struct PnvMachineClass PnvMachineClass;