X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=device_tree.c;h=f8b46b3c7331ae42dcc3be5ee4c5ce3d370d47c6;hb=3d6ad6bb466f487bcc861f99e2c9054230df1076;hp=3d41c4434bb385b9b7bcdf4a504b110ab74386d0;hpb=78e24f235eda4d3313917a50e135b7e06a046407;p=mirror_qemu.git

diff --git a/device_tree.c b/device_tree.c
index 3d41c4434b..f8b46b3c73 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -17,8 +17,10 @@
 #include <dirent.h>
 #endif
 
-#include "qemu-common.h"
+#include "qapi/error.h"
 #include "qemu/error-report.h"
+#include "qemu/option.h"
+#include "qemu/bswap.h"
 #include "sysemu/device_tree.h"
 #include "sysemu/sysemu.h"
 #include "hw/loader.h"
@@ -27,7 +29,7 @@
 
 #include <libfdt.h>
 
-#define FDT_MAX_SIZE  0x10000
+#define FDT_MAX_SIZE  0x100000
 
 void *create_device_tree(int *sizep)
 {
@@ -82,6 +84,10 @@ void *load_device_tree(const char *filename_path, int *sizep)
                      filename_path);
         goto fail;
     }
+    if (dt_size > INT_MAX / 2 - 10000) {
+        error_report("Device tree file '%s' is too large", filename_path);
+        goto fail;
+    }
 
     /* Expand to 2x size to give enough room for manipulation.  */
     dt_size += 10000;
@@ -89,7 +95,7 @@ void *load_device_tree(const char *filename_path, int *sizep)
     /* First allocate space in qemu for device tree */
     fdt = g_malloc0(dt_size);
 
-    dt_file_load_size = load_image(filename_path, fdt);
+    dt_file_load_size = load_image_size(filename_path, fdt, dt_size);
     if (dt_file_load_size < 0) {
         error_report("Unable to open device tree file '%s'",
                      filename_path);
@@ -138,14 +144,16 @@ static void read_fstree(void *fdt, const char *dirname)
     const char *parent_node;
 
     if (strstr(dirname, root_dir) != dirname) {
-        error_setg(&error_fatal, "%s: %s must be searched within %s",
-                   __func__, dirname, root_dir);
+        error_report("%s: %s must be searched within %s",
+                     __func__, dirname, root_dir);
+        exit(1);
     }
     parent_node = &dirname[strlen(SYSFS_DT_BASEDIR)];
 
     d = opendir(dirname);
     if (!d) {
-        error_setg(&error_fatal, "%s cannot open %s", __func__, dirname);
+        error_report("%s cannot open %s", __func__, dirname);
+        exit(1);
     }
 
     while ((de = readdir(d)) != NULL) {
@@ -159,7 +167,8 @@ static void read_fstree(void *fdt, const char *dirname)
         tmpnam = g_strdup_printf("%s/%s", dirname, de->d_name);
 
         if (lstat(tmpnam, &st) < 0) {
-            error_setg(&error_fatal, "%s cannot lstat %s", __func__, tmpnam);
+            error_report("%s cannot lstat %s", __func__, tmpnam);
+            exit(1);
         }
 
         if (S_ISREG(st.st_mode)) {
@@ -167,8 +176,9 @@ static void read_fstree(void *fdt, const char *dirname)
             gsize len;
 
             if (!g_file_get_contents(tmpnam, &val, &len, NULL)) {
-                error_setg(&error_fatal, "%s not able to extract info from %s",
-                           __func__, tmpnam);
+                error_report("%s not able to extract info from %s",
+                             __func__, tmpnam);
+                exit(1);
             }
 
             if (strlen(parent_node) > 0) {
@@ -203,9 +213,9 @@ void *load_device_tree_from_sysfs(void)
     host_fdt = create_device_tree(&host_fdt_size);
     read_fstree(host_fdt, SYSFS_DT_BASEDIR);
     if (fdt_check_header(host_fdt)) {
-        error_setg(&error_fatal,
-                   "%s host device tree extracted into memory is invalid",
-                   __func__);
+        error_report("%s host device tree extracted into memory is invalid",
+                     __func__);
+        exit(1);
     }
     return host_fdt;
 }
@@ -226,6 +236,61 @@ static int findnode_nofail(void *fdt, const char *node_path)
     return offset;
 }
 
+char **qemu_fdt_node_unit_path(void *fdt, const char *name, Error **errp)
+{
+    char *prefix =  g_strdup_printf("%s@", name);
+    unsigned int path_len = 16, n = 0;
+    GSList *path_list = NULL, *iter;
+    const char *iter_name;
+    int offset, len, ret;
+    char **path_array;
+
+    offset = fdt_next_node(fdt, -1, NULL);
+
+    while (offset >= 0) {
+        iter_name = fdt_get_name(fdt, offset, &len);
+        if (!iter_name) {
+            offset = len;
+            break;
+        }
+        if (!strcmp(iter_name, name) || g_str_has_prefix(iter_name, prefix)) {
+            char *path;
+
+            path = g_malloc(path_len);
+            while ((ret = fdt_get_path(fdt, offset, path, path_len))
+                  == -FDT_ERR_NOSPACE) {
+                path_len += 16;
+                path = g_realloc(path, path_len);
+            }
+            path_list = g_slist_prepend(path_list, path);
+            n++;
+        }
+        offset = fdt_next_node(fdt, offset, NULL);
+    }
+    g_free(prefix);
+
+    if (offset < 0 && offset != -FDT_ERR_NOTFOUND) {
+        error_setg(errp, "%s: abort parsing dt for %s node units: %s",
+                   __func__, name, fdt_strerror(offset));
+        for (iter = path_list; iter; iter = iter->next) {
+            g_free(iter->data);
+        }
+        g_slist_free(path_list);
+        return NULL;
+    }
+
+    path_array = g_new(char *, n + 1);
+    path_array[n--] = NULL;
+
+    for (iter = path_list; iter; iter = iter->next) {
+        path_array[n--] = iter->data;
+    }
+
+    g_slist_free(path_list);
+
+    return path_array;
+}
+
 char **qemu_fdt_node_path(void *fdt, const char *name, char *compat,
                           Error **errp)
 {
@@ -350,15 +415,22 @@ const void *qemu_fdt_getprop(void *fdt, const char *node_path,
 }
 
 uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path,
-                               const char *property)
+                               const char *property, int *lenp, Error **errp)
 {
     int len;
-    const uint32_t *p = qemu_fdt_getprop(fdt, node_path, property, &len,
-                                         &error_fatal);
-    if (len != 4) {
-        error_report("%s: %s/%s not 4 bytes long (not a cell?)",
-                     __func__, node_path, property);
-        exit(1);
+    const uint32_t *p;
+
+    if (!lenp) {
+        lenp = &len;
+    }
+    p = qemu_fdt_getprop(fdt, node_path, property, lenp, errp);
+    if (!p) {
+        return 0;
+    } else if (*lenp != 4) {
+        error_setg(errp, "%s: %s/%s not 4 bytes long (not a cell?)",
+                   __func__, node_path, property);
+        *lenp = -EINVAL;
+        return 0;
     }
     return be32_to_cpu(*p);
 }