[Qemu-devel] [RFC for-2.7 09/11] pseries: Consolidate construction of /chosen device tree node

[David Gibson <david@gibson.dropbear.id.au>]

For historical reasons construction of the /chosen node in the device tree
(amongst others) is split into several places.  This patch brings these
pieces back together to make things clearer.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/spapr.c             | 59 ++++++++++++++++++++--------------------------
 hw/ppc/spapr_vio.c         | 16 +++----------
 include/hw/ppc/spapr_vio.h |  2 +-
 3 files changed, 30 insertions(+), 47 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index d04d403..a000056 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -707,9 +707,7 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
     MachineState *machine = MACHINE(spapr);
     sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(machine);
     const char *boot_device = machine->boot_order;
-    int ret, i;
-    size_t cb = 0;
-    char *bootlist;
+    int ret;
     void *fdt;
     sPAPRPHBState *phb;
     char *buf;
@@ -759,6 +757,8 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
     /* /chosen */
     {
         QDTNode *chosen = qdt_add_subnode(root, "chosen");
+        char *bootlist;
+        size_t cb = 0, i;
 
         /* Set Form1_affinity */
         qdt_setprop_bytes(chosen, "ibm,architecture-vec-5",
@@ -782,6 +782,29 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
         qdt_setprop_cells(chosen, "qemu,graphic-width", graphic_width);
         qdt_setprop_cells(chosen, "qemu,graphic-height", graphic_height);
         qdt_setprop_cells(chosen, "qemu,graphic-depth", graphic_depth);
+
+        bootlist = get_boot_devices_list(&cb, true);
+        if (cb && bootlist) {
+            for (i = 0; i < cb; i++) {
+                if (bootlist[i] == '\n') {
+                    bootlist[i] = ' ';
+                }
+
+            }
+            qdt_setprop_string(chosen, "qemu,boot-list", bootlist);
+        }
+        g_free(bootlist);
+
+        if (boot_device && strlen(boot_device)) {
+            qdt_setprop_string(chosen, "qemu,boot-device", boot_device);
+        }
+
+        if (!spapr->has_graphics) {
+            char *stdout = spapr_vio_stdout_path(spapr->vio_bus);
+
+            qdt_setprop_string(chosen, "linux,stdout-path", stdout);
+            g_free(stdout);
+        }
     }
 
     /* RTAS */
@@ -933,40 +956,10 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
     /* cpus */
     spapr_populate_cpus_dt_node(fdt, spapr);
 
-    bootlist = get_boot_devices_list(&cb, true);
-    if (cb && bootlist) {
-        int offset = fdt_path_offset(fdt, "/chosen");
-        if (offset < 0) {
-            exit(1);
-        }
-        for (i = 0; i < cb; i++) {
-            if (bootlist[i] == '\n') {
-                bootlist[i] = ' ';
-            }
-
-        }
-        ret = fdt_setprop_string(fdt, offset, "qemu,boot-list", bootlist);
-    }
-
-    if (boot_device && strlen(boot_device)) {
-        int offset = fdt_path_offset(fdt, "/chosen");
-
-        if (offset < 0) {
-            exit(1);
-        }
-        fdt_setprop_string(fdt, offset, "qemu,boot-device", boot_device);
-    }
-
-    if (!spapr->has_graphics) {
-        spapr_populate_chosen_stdout(fdt, spapr->vio_bus);
-    }
-
     if (smc->dr_lmb_enabled) {
         _FDT(spapr_drc_populate_dt(fdt, 0, NULL, SPAPR_DR_CONNECTOR_TYPE_LMB));
     }
 
-    g_free(bootlist);
-
     /* Build memory reserve map */
     if (spapr->kernel_size) {
         _FDT((fdt_add_mem_rsv(fdt, KERNEL_LOAD_ADDR, spapr->kernel_size)));
diff --git a/hw/ppc/spapr_vio.c b/hw/ppc/spapr_vio.c
index 8aa021f..18b07e0 100644
--- a/hw/ppc/spapr_vio.c
+++ b/hw/ppc/spapr_vio.c
@@ -679,28 +679,18 @@ out:
     return ret;
 }
 
-int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus)
+gchar *spapr_vio_stdout_path(VIOsPAPRBus *bus)
 {
     VIOsPAPRDevice *dev;
     char *name, *path;
-    int ret, offset;
 
     dev = spapr_vty_get_default(bus);
     if (!dev)
-        return 0;
-
-    offset = fdt_path_offset(fdt, "/chosen");
-    if (offset < 0) {
-        return offset;
-    }
+        return NULL;
 
     name = spapr_vio_get_dev_name(DEVICE(dev));
     path = g_strdup_printf("/vdevice/%s", name);
-
-    ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
-
     g_free(name);
-    g_free(path);
 
-    return ret;
+    return path;
 }
diff --git a/include/hw/ppc/spapr_vio.h b/include/hw/ppc/spapr_vio.h
index c9733e7..ea00c3b 100644
--- a/include/hw/ppc/spapr_vio.h
+++ b/include/hw/ppc/spapr_vio.h
@@ -82,7 +82,7 @@ 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);
-extern int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus);
+gchar *spapr_vio_stdout_path(VIOsPAPRBus *bus);
 
 extern int spapr_vio_signal(VIOsPAPRDevice *dev, target_ulong mode);
 
-- 
2.5.5