From: Alistair Francis <alistair.francis@wdc.com>

Calling qdev_get_machine() in the soc_init function would result in
the following assert

    ../hw/core/qdev.c:858: qdev_get_machine: Assertion `dev' failed.

when trying to run

    ./qemu-system-aarch64 -S -display none -M virt -device xlnx-zynqmp,help

as the machine wasn't created yet. We call qdev_get_machine() to obtain
the number of CPUs in the machine. So instead of initialising the CPUs in
the SoC init let's instead do it in the realise where the machine
will exist.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Tested-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20260312043158.4191378-4-alistair.francis@wdc.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 hw/arm/xlnx-zynqmp.c | 42 ++++++++++++++++++------------------------
 1 file changed, 18 insertions(+), 24 deletions(-)

diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index 5f0e34ccecf..979e55e3057 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -380,30 +380,15 @@ static void xlnx_zynqmp_create_unimp_mmio(XlnxZynqMPState *s)
 
 static void xlnx_zynqmp_init(Object *obj)
 {
-    MachineState *ms = MACHINE(qdev_get_machine());
     XlnxZynqMPState *s = XLNX_ZYNQMP(obj);
     int i;
-    int num_apus = MIN(ms->smp.cpus, XLNX_ZYNQMP_NUM_APU_CPUS);
-    int num_rpus = xlnx_zynqmp_get_rpu_number(ms);
 
     object_initialize_child(obj, "apu-cluster", &s->apu_cluster,
                             TYPE_CPU_CLUSTER);
     qdev_prop_set_uint32(DEVICE(&s->apu_cluster), "cluster-id", 0);
 
-    for (i = 0; i < num_apus; i++) {
-        object_initialize_child(OBJECT(&s->apu_cluster), "apu-cpu[*]",
-                                &s->apu_cpu[i],
-                                ARM_CPU_TYPE_NAME("cortex-a53"));
-    }
-
     object_initialize_child(obj, "gic", &s->gic, gic_class_name());
 
-    if (num_rpus) {
-        /* Do not create the rpu_gic if we don't have rpus */
-        object_initialize_child(obj, "rpu_gic", &s->rpu_gic,
-                                gic_class_name());
-    }
-
     for (i = 0; i < XLNX_ZYNQMP_NUM_GEMS; i++) {
         object_initialize_child(obj, "gem[*]", &s->gem[i], TYPE_CADENCE_GEM);
         object_initialize_child(obj, "gem-irq-orgate[*]",
@@ -453,15 +438,6 @@ static void xlnx_zynqmp_init(Object *obj)
     object_initialize_child(obj, "qspi-irq-orgate",
                             &s->qspi_irq_orgate, TYPE_OR_IRQ);
 
-    if (num_rpus) {
-        for (i = 0; i < ARRAY_SIZE(s->splitter); i++) {
-            g_autofree char *name = g_strdup_printf("irq-splitter%d", i);
-            object_initialize_child(obj, name, &s->splitter[i], TYPE_SPLIT_IRQ);
-        }
-    }
-
-
-
     for (i = 0; i < XLNX_ZYNQMP_NUM_USB; i++) {
         object_initialize_child(obj, "usb[*]", &s->usb[i], TYPE_USB_DWC3);
     }
@@ -483,6 +459,24 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
 
     ram_size = memory_region_size(s->ddr_ram);
 
+    for (i = 0; i < num_apus; i++) {
+        object_initialize_child(OBJECT(&s->apu_cluster), "apu-cpu[*]",
+                                &s->apu_cpu[i],
+                                ARM_CPU_TYPE_NAME("cortex-a53"));
+    }
+
+    if (num_rpus) {
+        /* Do not create the rpu_gic if we don't have rpus */
+        object_initialize_child(OBJECT(dev), "rpu_gic", &s->rpu_gic,
+                                gic_class_name());
+
+        for (i = 0; i < ARRAY_SIZE(s->splitter); i++) {
+            g_autofree char *name = g_strdup_printf("irq-splitter%d", i);
+            object_initialize_child(OBJECT(dev), name, &s->splitter[i], TYPE_SPLIT_IRQ);
+        }
+    }
+
+
     /*
      * Create the DDR Memory Regions. User friendly checks should happen at
      * the board level
-- 
2.53.0