pseries: Consolidate construction of /vdevice device tree node

Construction of the /vdevice node (and its children) is divided between
spapr_create_fdt_skel() (at init time), which creates the base node, and
spapr_populate_vdevice() (at reset time) which creates the nodes for each
individual virtual device.

This consolidates both into a single function called from
spapr_build_fdt().

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>

hw/ppc/spapr.c

@@ -316,18 +316,6 @@ static void *spapr_create_fdt_skel(sPAPRMachineState *spapr)
     _FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
     _FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
 
-    /* vdevice */
-    _FDT((fdt_begin_node(fdt, "vdevice")));
-
-    _FDT((fdt_property_string(fdt, "device_type", "vdevice")));
-    _FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
-    _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
-    _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
-    _FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
-    _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
-
-    _FDT((fdt_end_node(fdt)));
-
     _FDT((fdt_end_node(fdt))); /* close root node */
     _FDT((fdt_finish(fdt)));
 
@@ -943,11 +931,8 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
         exit(1);
     }
 
-    ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
+    /* /vdevice */
-    if (ret < 0) {
+    spapr_dt_vdevice(spapr->vio_bus, fdt);
-        error_report("couldn't setup vio devices in fdt");
-        exit(1);
-    }
 
     if (object_resolve_path_type("", TYPE_SPAPR_RNG, NULL)) {
         ret = spapr_rng_populate_dt(fdt);

hw/ppc/spapr_vio.c

@@ -36,6 +36,7 @@
 #include "hw/ppc/spapr.h"
 #include "hw/ppc/spapr_vio.h"
 #include "hw/ppc/xics.h"
+#include "hw/ppc/fdt.h"
 #include "trace.h"
 
 #include <libfdt.h>
@@ -624,11 +625,21 @@ static int compare_reg(const void *p1, const void *p2)
     return 1;
 }
 
-int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt)
+void spapr_dt_vdevice(VIOsPAPRBus *bus, void *fdt)
 {
     DeviceState *qdev, **qdevs;
     BusChild *kid;
     int i, num, ret = 0;
+    int node;
+
+    _FDT(node = fdt_add_subnode(fdt, 0, "vdevice"));
+
+    _FDT(fdt_setprop_string(fdt, node, "device_type", "vdevice"));
+    _FDT(fdt_setprop_string(fdt, node, "compatible", "IBM,vdevice"));
+    _FDT(fdt_setprop_cell(fdt, node, "#address-cells", 1));
+    _FDT(fdt_setprop_cell(fdt, node, "#size-cells", 0));
+    _FDT(fdt_setprop_cell(fdt, node, "#interrupt-cells", 2));
+    _FDT(fdt_setprop(fdt, node, "interrupt-controller", NULL, 0));
 
     /* Count qdevs on the bus list */
     num = 0;
@@ -650,19 +661,17 @@ int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt)
      * to know that will mean they are in forward order in the tree. */
     for (i = num - 1; i >= 0; i--) {
         VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]);
+        VIOsPAPRDeviceClass *vdc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
 
         ret = vio_make_devnode(dev, fdt);
-
         if (ret < 0) {
-            goto out;
+            error_report("Couldn't create device node /vdevice/%s@%"PRIx32,
+                         vdc->dt_name, dev->reg);
+            exit(1);
         }
     }
 
-    ret = 0;
-out:
     g_free(qdevs);
-
-    return ret;
 }
 
 gchar *spapr_vio_stdout_path(VIOsPAPRBus *bus)

include/hw/ppc/spapr_vio.h

@@ -80,7 +80,7 @@ struct VIOsPAPRBus {
 
 extern VIOsPAPRBus *spapr_vio_bus_init(void);
 extern VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg);
-extern int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt);
+void spapr_dt_vdevice(VIOsPAPRBus *bus, void *fdt);
 extern gchar *spapr_vio_stdout_path(VIOsPAPRBus *bus);
 
 static inline qemu_irq spapr_vio_qirq(VIOsPAPRDevice *dev)