pseries: Consolidate construction of /chosen device tree node

For historical reasons, building the /chosen node in the guest device tree
is split across several places and includes both parts which write the DT
sequentially and others which use random access functions.

This patch consolidates construction of the node into one place, using
random access functions throughout.

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>

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 102f0081ec7c0b0ad92a4cf2cfbd37de99a08e01..1d8dd7f5b9e72c5fc0b42ee58e74576fea926c81 100644 (file)
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -273,14 +273,10 @@ static void add_str(GString *s, const gchar *s1)
 
 static void *spapr_create_fdt_skel(sPAPRMachineState *spapr)
 {
-    MachineState *machine = MACHINE(spapr);
     void *fdt;
-    uint32_t start_prop = cpu_to_be32(spapr->initrd_base);
-    uint32_t end_prop = cpu_to_be32(spapr->initrd_base + spapr->initrd_size);
     GString *hypertas = g_string_sized_new(256);
     GString *qemu_hypertas = g_string_sized_new(256);
     uint32_t refpoints[] = {cpu_to_be32(0x4), cpu_to_be32(0x4)};
-    unsigned char vec5[] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x80};
     char *buf;
 
     add_str(hypertas, "hcall-pft");
@@ -337,35 +333,6 @@ static void *spapr_create_fdt_skel(sPAPRMachineState *spapr)
     _FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
     _FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
 
-    /* /chosen */
-    _FDT((fdt_begin_node(fdt, "chosen")));
-
-    /* Set Form1_affinity */
-    _FDT((fdt_property(fdt, "ibm,architecture-vec-5", vec5, sizeof(vec5))));
-
-    _FDT((fdt_property_string(fdt, "bootargs", machine->kernel_cmdline)));
-    _FDT((fdt_property(fdt, "linux,initrd-start",
-                       &start_prop, sizeof(start_prop))));
-    _FDT((fdt_property(fdt, "linux,initrd-end",
-                       &end_prop, sizeof(end_prop))));
-    if (spapr->kernel_size) {
-        uint64_t kprop[2] = { cpu_to_be64(KERNEL_LOAD_ADDR),
-                              cpu_to_be64(spapr->kernel_size) };
-
-        _FDT((fdt_property(fdt, "qemu,boot-kernel", &kprop, sizeof(kprop))));
-        if (spapr->kernel_le) {
-            _FDT((fdt_property(fdt, "qemu,boot-kernel-le", NULL, 0)));
-        }
-    }
-    if (boot_menu) {
-        _FDT((fdt_property_cell(fdt, "qemu,boot-menu", boot_menu)));
-    }
-    _FDT((fdt_property_cell(fdt, "qemu,graphic-width", graphic_width)));
-    _FDT((fdt_property_cell(fdt, "qemu,graphic-height", graphic_height)));
-    _FDT((fdt_property_cell(fdt, "qemu,graphic-depth", graphic_depth)));
-
-    _FDT((fdt_end_node(fdt)));
-
     /* RTAS */
     _FDT((fdt_begin_node(fdt, "rtas")));
 
@@ -873,6 +840,68 @@ int spapr_h_cas_compose_response(sPAPRMachineState *spapr,
     return 0;
 }
 
+static void spapr_dt_chosen(sPAPRMachineState *spapr, void *fdt)
+{
+    MachineState *machine = MACHINE(spapr);
+    int chosen;
+    const char *boot_device = machine->boot_order;
+    char *stdout_path = spapr_vio_stdout_path(spapr->vio_bus);
+    size_t cb = 0;
+    char *bootlist = get_boot_devices_list(&cb, true);
+    unsigned char vec5[] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x80};
+
+    _FDT(chosen = fdt_add_subnode(fdt, 0, "chosen"));
+
+    /* Set Form1_affinity */
+    _FDT(fdt_setprop(fdt, chosen, "ibm,architecture-vec-5",
+                     vec5, sizeof(vec5)));
+
+    _FDT(fdt_setprop_string(fdt, chosen, "bootargs", machine->kernel_cmdline));
+    _FDT(fdt_setprop_cell(fdt, chosen, "linux,initrd-start",
+                          spapr->initrd_base));
+    _FDT(fdt_setprop_cell(fdt, chosen, "linux,initrd-end",
+                          spapr->initrd_base + spapr->initrd_size));
+
+    if (spapr->kernel_size) {
+        uint64_t kprop[2] = { cpu_to_be64(KERNEL_LOAD_ADDR),
+                              cpu_to_be64(spapr->kernel_size) };
+
+        _FDT(fdt_setprop(fdt, chosen, "qemu,boot-kernel",
+                         &kprop, sizeof(kprop)));
+        if (spapr->kernel_le) {
+            _FDT(fdt_setprop(fdt, chosen, "qemu,boot-kernel-le", NULL, 0));
+        }
+    }
+    if (boot_menu) {
+        _FDT((fdt_setprop_cell(fdt, chosen, "qemu,boot-menu", boot_menu)));
+    }
+    _FDT(fdt_setprop_cell(fdt, chosen, "qemu,graphic-width", graphic_width));
+    _FDT(fdt_setprop_cell(fdt, chosen, "qemu,graphic-height", graphic_height));
+    _FDT(fdt_setprop_cell(fdt, chosen, "qemu,graphic-depth", graphic_depth));
+
+    if (cb && bootlist) {
+        int i;
+
+        for (i = 0; i < cb; i++) {
+            if (bootlist[i] == '\n') {
+                bootlist[i] = ' ';
+            }
+        }
+        _FDT(fdt_setprop_string(fdt, chosen, "qemu,boot-list", bootlist));
+    }
+
+    if (boot_device && strlen(boot_device)) {
+        _FDT(fdt_setprop_string(fdt, chosen, "qemu,boot-device", boot_device));
+    }
+
+    if (!spapr->has_graphics && stdout_path) {
+        _FDT(fdt_setprop_string(fdt, chosen, "linux,stdout-path", stdout_path));
+    }
+
+    g_free(stdout_path);
+    g_free(bootlist);
+}
+
 static void *spapr_build_fdt(sPAPRMachineState *spapr,
                              hwaddr rtas_addr,
                              hwaddr rtas_size)
@@ -880,10 +909,7 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
     MachineState *machine = MACHINE(qdev_get_machine());
     MachineClass *mc = MACHINE_GET_CLASS(machine);
     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;
 
@@ -932,34 +958,6 @@ 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));
     }
@@ -974,7 +972,8 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
         }
     }
 
-    g_free(bootlist);
+    /* /chosen */
+    spapr_dt_chosen(spapr, fdt);
 
     /* Build memory reserve map */
     if (spapr->kernel_size) {

diff --git a/hw/ppc/spapr_vio.c b/hw/ppc/spapr_vio.c
index 3648aa59604465d99466f2d7e4d401e4d275dbc5..2b67df0a973eaa54891e6c69d920fa25488c82fd 100644 (file)
--- a/hw/ppc/spapr_vio.c
+++ b/hw/ppc/spapr_vio.c
@@ -665,28 +665,19 @@ 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;
+    if (!dev) {
+        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 0b025fd66b427c1d9f89c6ba7cc0b61ba1da639d..a0e75424fa7f7e3882a56b9be7307136b6d7b994 100644 (file)
--- a/include/hw/ppc/spapr_vio.h
+++ b/include/hw/ppc/spapr_vio.h
@@ -81,7 +81,7 @@ 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);
+extern gchar *spapr_vio_stdout_path(VIOsPAPRBus *bus);
 
 static inline qemu_irq spapr_vio_qirq(VIOsPAPRDevice *dev)
 {