aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Functions to help device tree manipulation using libfdt. |
| 3 | * It also provides functions to read entries from device tree proc |
| 4 | * interface. |
| 5 | * |
| 6 | * Copyright 2008 IBM Corporation. |
| 7 | * Authors: Jerone Young <jyoung5@us.ibm.com> |
| 8 | * Hollis Blanchard <hollisb@us.ibm.com> |
| 9 | * |
| 10 | * This work is licensed under the GNU GPL license version 2 or later. |
| 11 | * |
| 12 | */ |
| 13 | |
Peter Maydell | d38ea87 | 2016-01-29 17:50:05 +0000 | [diff] [blame] | 14 | #include "qemu/osdep.h" |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 15 | |
Eric Auger | 60e43e9 | 2016-02-19 09:42:29 -0700 | [diff] [blame] | 16 | #ifdef CONFIG_LINUX |
| 17 | #include <dirent.h> |
| 18 | #endif |
| 19 | |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 20 | #include "qapi/error.h" |
Li Liu | db013f8 | 2014-08-26 14:38:02 +0800 | [diff] [blame] | 21 | #include "qemu/error-report.h" |
Markus Armbruster | 922a01a | 2018-02-01 12:18:46 +0100 | [diff] [blame] | 22 | #include "qemu/option.h" |
Paolo Bonzini | 58369e2 | 2016-03-15 17:22:36 +0100 | [diff] [blame] | 23 | #include "qemu/bswap.h" |
Alex Bennée | 78da6a1 | 2021-03-03 17:36:38 +0000 | [diff] [blame] | 24 | #include "qemu/cutils.h" |
Jason A. Donenfeld | e1e618b | 2022-10-25 02:43:18 +0200 | [diff] [blame] | 25 | #include "qemu/guest-random.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 26 | #include "sysemu/device_tree.h" |
Blue Swirl | 39b7f20 | 2009-09-22 17:51:36 +0000 | [diff] [blame] | 27 | #include "hw/loader.h" |
Marcel Apfelbaum | 6cabe7f | 2015-02-04 17:43:53 +0200 | [diff] [blame] | 28 | #include "hw/boards.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 29 | #include "qemu/config-file.h" |
Daniel Henrique Barboza | bf353ad | 2022-09-26 14:38:40 -0300 | [diff] [blame] | 30 | #include "qapi/qapi-commands-machine.h" |
| 31 | #include "qapi/qmp/qdict.h" |
| 32 | #include "monitor/hmp.h" |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 33 | |
| 34 | #include <libfdt.h> |
| 35 | |
Geert Uytterhoeven | 14ec3cb | 2018-04-26 11:04:38 +0100 | [diff] [blame] | 36 | #define FDT_MAX_SIZE 0x100000 |
Alexander Graf | ce36252 | 2012-05-17 15:33:54 +0200 | [diff] [blame] | 37 | |
| 38 | void *create_device_tree(int *sizep) |
| 39 | { |
| 40 | void *fdt; |
| 41 | int ret; |
| 42 | |
| 43 | *sizep = FDT_MAX_SIZE; |
| 44 | fdt = g_malloc0(FDT_MAX_SIZE); |
| 45 | ret = fdt_create(fdt, FDT_MAX_SIZE); |
| 46 | if (ret < 0) { |
| 47 | goto fail; |
| 48 | } |
Peter Maydell | ef6de70 | 2013-11-22 17:17:09 +0000 | [diff] [blame] | 49 | ret = fdt_finish_reservemap(fdt); |
| 50 | if (ret < 0) { |
| 51 | goto fail; |
| 52 | } |
Alexander Graf | ce36252 | 2012-05-17 15:33:54 +0200 | [diff] [blame] | 53 | ret = fdt_begin_node(fdt, ""); |
| 54 | if (ret < 0) { |
| 55 | goto fail; |
| 56 | } |
| 57 | ret = fdt_end_node(fdt); |
| 58 | if (ret < 0) { |
| 59 | goto fail; |
| 60 | } |
| 61 | ret = fdt_finish(fdt); |
| 62 | if (ret < 0) { |
| 63 | goto fail; |
| 64 | } |
| 65 | ret = fdt_open_into(fdt, fdt, *sizep); |
| 66 | if (ret) { |
Bernhard Beschow | d4fae97 | 2022-01-16 12:46:49 +0100 | [diff] [blame] | 67 | error_report("%s: Unable to copy device tree into memory: %s", |
| 68 | __func__, fdt_strerror(ret)); |
Alexander Graf | ce36252 | 2012-05-17 15:33:54 +0200 | [diff] [blame] | 69 | exit(1); |
| 70 | } |
| 71 | |
| 72 | return fdt; |
| 73 | fail: |
Li Liu | 508e221 | 2014-08-26 14:38:03 +0800 | [diff] [blame] | 74 | error_report("%s Couldn't create dt: %s", __func__, fdt_strerror(ret)); |
Alexander Graf | ce36252 | 2012-05-17 15:33:54 +0200 | [diff] [blame] | 75 | exit(1); |
| 76 | } |
| 77 | |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 78 | void *load_device_tree(const char *filename_path, int *sizep) |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 79 | { |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 80 | int dt_size; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 81 | int dt_file_load_size; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 82 | int ret; |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 83 | void *fdt = NULL; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 84 | |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 85 | *sizep = 0; |
| 86 | dt_size = get_image_size(filename_path); |
| 87 | if (dt_size < 0) { |
Li Liu | db013f8 | 2014-08-26 14:38:02 +0800 | [diff] [blame] | 88 | error_report("Unable to get size of device tree file '%s'", |
| 89 | filename_path); |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 90 | goto fail; |
| 91 | } |
Markus Armbruster | 065e629 | 2019-04-09 19:40:18 +0200 | [diff] [blame] | 92 | if (dt_size > INT_MAX / 2 - 10000) { |
| 93 | error_report("Device tree file '%s' is too large", filename_path); |
| 94 | goto fail; |
| 95 | } |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 96 | |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 97 | /* Expand to 2x size to give enough room for manipulation. */ |
Alexander Graf | ded57c5 | 2011-07-23 10:54:11 +0200 | [diff] [blame] | 98 | dt_size += 10000; |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 99 | dt_size *= 2; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 100 | /* First allocate space in qemu for device tree */ |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 101 | fdt = g_malloc0(dt_size); |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 102 | |
Peter Maydell | da885fe | 2018-12-14 13:30:52 +0000 | [diff] [blame] | 103 | dt_file_load_size = load_image_size(filename_path, fdt, dt_size); |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 104 | if (dt_file_load_size < 0) { |
Li Liu | db013f8 | 2014-08-26 14:38:02 +0800 | [diff] [blame] | 105 | error_report("Unable to open device tree file '%s'", |
| 106 | filename_path); |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 107 | goto fail; |
| 108 | } |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 109 | |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 110 | ret = fdt_open_into(fdt, fdt, dt_size); |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 111 | if (ret) { |
Bernhard Beschow | d4fae97 | 2022-01-16 12:46:49 +0100 | [diff] [blame] | 112 | error_report("%s: Unable to copy device tree into memory: %s", |
| 113 | __func__, fdt_strerror(ret)); |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 114 | goto fail; |
| 115 | } |
| 116 | |
| 117 | /* Check sanity of device tree */ |
| 118 | if (fdt_check_header(fdt)) { |
Li Liu | db013f8 | 2014-08-26 14:38:02 +0800 | [diff] [blame] | 119 | error_report("Device tree file loaded into memory is invalid: %s", |
| 120 | filename_path); |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 121 | goto fail; |
| 122 | } |
pbrook | 7ec632b | 2009-04-10 16:23:59 +0000 | [diff] [blame] | 123 | *sizep = dt_size; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 124 | return fdt; |
| 125 | |
| 126 | fail: |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 127 | g_free(fdt); |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 128 | return NULL; |
| 129 | } |
| 130 | |
Eric Auger | 60e43e9 | 2016-02-19 09:42:29 -0700 | [diff] [blame] | 131 | #ifdef CONFIG_LINUX |
| 132 | |
| 133 | #define SYSFS_DT_BASEDIR "/proc/device-tree" |
| 134 | |
| 135 | /** |
| 136 | * read_fstree: this function is inspired from dtc read_fstree |
| 137 | * @fdt: preallocated fdt blob buffer, to be populated |
| 138 | * @dirname: directory to scan under SYSFS_DT_BASEDIR |
| 139 | * the search is recursive and the tree is searched down to the |
| 140 | * leaves (property files). |
| 141 | * |
| 142 | * the function asserts in case of error |
| 143 | */ |
| 144 | static void read_fstree(void *fdt, const char *dirname) |
| 145 | { |
| 146 | DIR *d; |
| 147 | struct dirent *de; |
| 148 | struct stat st; |
| 149 | const char *root_dir = SYSFS_DT_BASEDIR; |
| 150 | const char *parent_node; |
| 151 | |
| 152 | if (strstr(dirname, root_dir) != dirname) { |
Philippe Mathieu-Daudé | 38754e4 | 2018-06-29 15:11:00 +0100 | [diff] [blame] | 153 | error_report("%s: %s must be searched within %s", |
| 154 | __func__, dirname, root_dir); |
| 155 | exit(1); |
Eric Auger | 60e43e9 | 2016-02-19 09:42:29 -0700 | [diff] [blame] | 156 | } |
| 157 | parent_node = &dirname[strlen(SYSFS_DT_BASEDIR)]; |
| 158 | |
| 159 | d = opendir(dirname); |
| 160 | if (!d) { |
Philippe Mathieu-Daudé | 38754e4 | 2018-06-29 15:11:00 +0100 | [diff] [blame] | 161 | error_report("%s cannot open %s", __func__, dirname); |
| 162 | exit(1); |
Eric Auger | 60e43e9 | 2016-02-19 09:42:29 -0700 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | while ((de = readdir(d)) != NULL) { |
| 166 | char *tmpnam; |
| 167 | |
| 168 | if (!g_strcmp0(de->d_name, ".") |
| 169 | || !g_strcmp0(de->d_name, "..")) { |
| 170 | continue; |
| 171 | } |
| 172 | |
| 173 | tmpnam = g_strdup_printf("%s/%s", dirname, de->d_name); |
| 174 | |
| 175 | if (lstat(tmpnam, &st) < 0) { |
Philippe Mathieu-Daudé | 38754e4 | 2018-06-29 15:11:00 +0100 | [diff] [blame] | 176 | error_report("%s cannot lstat %s", __func__, tmpnam); |
| 177 | exit(1); |
Eric Auger | 60e43e9 | 2016-02-19 09:42:29 -0700 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | if (S_ISREG(st.st_mode)) { |
| 181 | gchar *val; |
| 182 | gsize len; |
| 183 | |
| 184 | if (!g_file_get_contents(tmpnam, &val, &len, NULL)) { |
Philippe Mathieu-Daudé | 38754e4 | 2018-06-29 15:11:00 +0100 | [diff] [blame] | 185 | error_report("%s not able to extract info from %s", |
| 186 | __func__, tmpnam); |
| 187 | exit(1); |
Eric Auger | 60e43e9 | 2016-02-19 09:42:29 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | if (strlen(parent_node) > 0) { |
| 191 | qemu_fdt_setprop(fdt, parent_node, |
| 192 | de->d_name, val, len); |
| 193 | } else { |
| 194 | qemu_fdt_setprop(fdt, "/", de->d_name, val, len); |
| 195 | } |
| 196 | g_free(val); |
| 197 | } else if (S_ISDIR(st.st_mode)) { |
| 198 | char *node_name; |
| 199 | |
| 200 | node_name = g_strdup_printf("%s/%s", |
| 201 | parent_node, de->d_name); |
| 202 | qemu_fdt_add_subnode(fdt, node_name); |
| 203 | g_free(node_name); |
| 204 | read_fstree(fdt, tmpnam); |
| 205 | } |
| 206 | |
| 207 | g_free(tmpnam); |
| 208 | } |
| 209 | |
| 210 | closedir(d); |
| 211 | } |
| 212 | |
| 213 | /* load_device_tree_from_sysfs: extract the dt blob from host sysfs */ |
| 214 | void *load_device_tree_from_sysfs(void) |
| 215 | { |
| 216 | void *host_fdt; |
| 217 | int host_fdt_size; |
| 218 | |
| 219 | host_fdt = create_device_tree(&host_fdt_size); |
| 220 | read_fstree(host_fdt, SYSFS_DT_BASEDIR); |
| 221 | if (fdt_check_header(host_fdt)) { |
Philippe Mathieu-Daudé | 38754e4 | 2018-06-29 15:11:00 +0100 | [diff] [blame] | 222 | error_report("%s host device tree extracted into memory is invalid", |
| 223 | __func__); |
| 224 | exit(1); |
Eric Auger | 60e43e9 | 2016-02-19 09:42:29 -0700 | [diff] [blame] | 225 | } |
| 226 | return host_fdt; |
| 227 | } |
| 228 | |
| 229 | #endif /* CONFIG_LINUX */ |
| 230 | |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 231 | static int findnode_nofail(void *fdt, const char *node_path) |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 232 | { |
| 233 | int offset; |
| 234 | |
| 235 | offset = fdt_path_offset(fdt, node_path); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 236 | if (offset < 0) { |
Li Liu | 508e221 | 2014-08-26 14:38:03 +0800 | [diff] [blame] | 237 | error_report("%s Couldn't find node %s: %s", __func__, node_path, |
| 238 | fdt_strerror(offset)); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 239 | exit(1); |
| 240 | } |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 241 | |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 242 | return offset; |
| 243 | } |
| 244 | |
Eric Auger | f963cc2 | 2018-06-29 15:11:01 +0100 | [diff] [blame] | 245 | char **qemu_fdt_node_unit_path(void *fdt, const char *name, Error **errp) |
| 246 | { |
| 247 | char *prefix = g_strdup_printf("%s@", name); |
| 248 | unsigned int path_len = 16, n = 0; |
| 249 | GSList *path_list = NULL, *iter; |
| 250 | const char *iter_name; |
| 251 | int offset, len, ret; |
| 252 | char **path_array; |
| 253 | |
| 254 | offset = fdt_next_node(fdt, -1, NULL); |
| 255 | |
| 256 | while (offset >= 0) { |
| 257 | iter_name = fdt_get_name(fdt, offset, &len); |
| 258 | if (!iter_name) { |
| 259 | offset = len; |
| 260 | break; |
| 261 | } |
| 262 | if (!strcmp(iter_name, name) || g_str_has_prefix(iter_name, prefix)) { |
| 263 | char *path; |
| 264 | |
| 265 | path = g_malloc(path_len); |
| 266 | while ((ret = fdt_get_path(fdt, offset, path, path_len)) |
| 267 | == -FDT_ERR_NOSPACE) { |
| 268 | path_len += 16; |
| 269 | path = g_realloc(path, path_len); |
| 270 | } |
| 271 | path_list = g_slist_prepend(path_list, path); |
| 272 | n++; |
| 273 | } |
| 274 | offset = fdt_next_node(fdt, offset, NULL); |
| 275 | } |
| 276 | g_free(prefix); |
| 277 | |
| 278 | if (offset < 0 && offset != -FDT_ERR_NOTFOUND) { |
| 279 | error_setg(errp, "%s: abort parsing dt for %s node units: %s", |
| 280 | __func__, name, fdt_strerror(offset)); |
| 281 | for (iter = path_list; iter; iter = iter->next) { |
| 282 | g_free(iter->data); |
| 283 | } |
| 284 | g_slist_free(path_list); |
| 285 | return NULL; |
| 286 | } |
| 287 | |
| 288 | path_array = g_new(char *, n + 1); |
| 289 | path_array[n--] = NULL; |
| 290 | |
| 291 | for (iter = path_list; iter; iter = iter->next) { |
| 292 | path_array[n--] = iter->data; |
| 293 | } |
| 294 | |
| 295 | g_slist_free(path_list); |
| 296 | |
| 297 | return path_array; |
| 298 | } |
| 299 | |
Edgar E. Iglesias | 958bae1 | 2020-04-23 14:11:12 +0200 | [diff] [blame] | 300 | char **qemu_fdt_node_path(void *fdt, const char *name, const char *compat, |
Eric Auger | 6d79566 | 2016-02-19 09:42:30 -0700 | [diff] [blame] | 301 | Error **errp) |
| 302 | { |
| 303 | int offset, len, ret; |
| 304 | const char *iter_name; |
| 305 | unsigned int path_len = 16, n = 0; |
| 306 | GSList *path_list = NULL, *iter; |
| 307 | char **path_array; |
| 308 | |
| 309 | offset = fdt_node_offset_by_compatible(fdt, -1, compat); |
| 310 | |
| 311 | while (offset >= 0) { |
| 312 | iter_name = fdt_get_name(fdt, offset, &len); |
| 313 | if (!iter_name) { |
| 314 | offset = len; |
| 315 | break; |
| 316 | } |
Edgar E. Iglesias | 80972d3 | 2020-04-23 14:11:11 +0200 | [diff] [blame] | 317 | if (!name || !strcmp(iter_name, name)) { |
Eric Auger | 6d79566 | 2016-02-19 09:42:30 -0700 | [diff] [blame] | 318 | char *path; |
| 319 | |
| 320 | path = g_malloc(path_len); |
| 321 | while ((ret = fdt_get_path(fdt, offset, path, path_len)) |
| 322 | == -FDT_ERR_NOSPACE) { |
| 323 | path_len += 16; |
| 324 | path = g_realloc(path, path_len); |
| 325 | } |
| 326 | path_list = g_slist_prepend(path_list, path); |
| 327 | n++; |
| 328 | } |
| 329 | offset = fdt_node_offset_by_compatible(fdt, offset, compat); |
| 330 | } |
| 331 | |
| 332 | if (offset < 0 && offset != -FDT_ERR_NOTFOUND) { |
| 333 | error_setg(errp, "%s: abort parsing dt for %s/%s: %s", |
| 334 | __func__, name, compat, fdt_strerror(offset)); |
| 335 | for (iter = path_list; iter; iter = iter->next) { |
| 336 | g_free(iter->data); |
| 337 | } |
| 338 | g_slist_free(path_list); |
| 339 | return NULL; |
| 340 | } |
| 341 | |
| 342 | path_array = g_new(char *, n + 1); |
| 343 | path_array[n--] = NULL; |
| 344 | |
| 345 | for (iter = path_list; iter; iter = iter->next) { |
| 346 | path_array[n--] = iter->data; |
| 347 | } |
| 348 | |
| 349 | g_slist_free(path_list); |
| 350 | |
| 351 | return path_array; |
| 352 | } |
| 353 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 354 | int qemu_fdt_setprop(void *fdt, const char *node_path, |
Peter Crosthwaite | be5907f | 2013-11-11 18:15:21 +1000 | [diff] [blame] | 355 | const char *property, const void *val, int size) |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 356 | { |
| 357 | int r; |
| 358 | |
Peter Crosthwaite | be5907f | 2013-11-11 18:15:21 +1000 | [diff] [blame] | 359 | r = fdt_setprop(fdt, findnode_nofail(fdt, node_path), property, val, size); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 360 | if (r < 0) { |
Li Liu | 508e221 | 2014-08-26 14:38:03 +0800 | [diff] [blame] | 361 | error_report("%s: Couldn't set %s/%s: %s", __func__, node_path, |
| 362 | property, fdt_strerror(r)); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 363 | exit(1); |
| 364 | } |
| 365 | |
| 366 | return r; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 367 | } |
| 368 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 369 | int qemu_fdt_setprop_cell(void *fdt, const char *node_path, |
| 370 | const char *property, uint32_t val) |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 371 | { |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 372 | int r; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 373 | |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 374 | r = fdt_setprop_cell(fdt, findnode_nofail(fdt, node_path), property, val); |
| 375 | if (r < 0) { |
Li Liu | 508e221 | 2014-08-26 14:38:03 +0800 | [diff] [blame] | 376 | error_report("%s: Couldn't set %s/%s = %#08x: %s", __func__, |
| 377 | node_path, property, val, fdt_strerror(r)); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 378 | exit(1); |
| 379 | } |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 380 | |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 381 | return r; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 382 | } |
| 383 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 384 | int qemu_fdt_setprop_u64(void *fdt, const char *node_path, |
| 385 | const char *property, uint64_t val) |
Alexander Graf | bb28eb3 | 2012-05-18 01:53:01 +0200 | [diff] [blame] | 386 | { |
| 387 | val = cpu_to_be64(val); |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 388 | return qemu_fdt_setprop(fdt, node_path, property, &val, sizeof(val)); |
Alexander Graf | bb28eb3 | 2012-05-18 01:53:01 +0200 | [diff] [blame] | 389 | } |
| 390 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 391 | int qemu_fdt_setprop_string(void *fdt, const char *node_path, |
| 392 | const char *property, const char *string) |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 393 | { |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 394 | int r; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 395 | |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 396 | r = fdt_setprop_string(fdt, findnode_nofail(fdt, node_path), property, string); |
| 397 | if (r < 0) { |
Li Liu | 508e221 | 2014-08-26 14:38:03 +0800 | [diff] [blame] | 398 | error_report("%s: Couldn't set %s/%s = %s: %s", __func__, |
| 399 | node_path, property, string, fdt_strerror(r)); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 400 | exit(1); |
| 401 | } |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 402 | |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 403 | return r; |
aurel32 | f652e6a | 2008-12-16 10:43:48 +0000 | [diff] [blame] | 404 | } |
Alexander Graf | d69a8e6 | 2011-07-21 01:52:57 +0200 | [diff] [blame] | 405 | |
Alex Bennée | 78da6a1 | 2021-03-03 17:36:38 +0000 | [diff] [blame] | 406 | /* |
| 407 | * libfdt doesn't allow us to add string arrays directly but they are |
| 408 | * test a series of null terminated strings with a length. We build |
| 409 | * the string up here so we can calculate the final length. |
| 410 | */ |
| 411 | int qemu_fdt_setprop_string_array(void *fdt, const char *node_path, |
| 412 | const char *prop, char **array, int len) |
| 413 | { |
| 414 | int ret, i, total_len = 0; |
| 415 | char *str, *p; |
| 416 | for (i = 0; i < len; i++) { |
| 417 | total_len += strlen(array[i]) + 1; |
| 418 | } |
| 419 | p = str = g_malloc0(total_len); |
| 420 | for (i = 0; i < len; i++) { |
Alistair Francis | 5567fa8 | 2023-09-25 14:30:23 +1000 | [diff] [blame] | 421 | int offset = strlen(array[i]) + 1; |
| 422 | pstrcpy(p, offset, array[i]); |
| 423 | p += offset; |
Alex Bennée | 78da6a1 | 2021-03-03 17:36:38 +0000 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | ret = qemu_fdt_setprop(fdt, node_path, prop, str, total_len); |
| 427 | g_free(str); |
| 428 | return ret; |
| 429 | } |
| 430 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 431 | const void *qemu_fdt_getprop(void *fdt, const char *node_path, |
Eric Auger | 78e24f2 | 2016-02-19 09:42:30 -0700 | [diff] [blame] | 432 | const char *property, int *lenp, Error **errp) |
Peter Maydell | f0aa713 | 2012-07-20 13:34:50 +0100 | [diff] [blame] | 433 | { |
| 434 | int len; |
| 435 | const void *r; |
Eric Auger | 78e24f2 | 2016-02-19 09:42:30 -0700 | [diff] [blame] | 436 | |
Peter Maydell | f0aa713 | 2012-07-20 13:34:50 +0100 | [diff] [blame] | 437 | if (!lenp) { |
| 438 | lenp = &len; |
| 439 | } |
| 440 | r = fdt_getprop(fdt, findnode_nofail(fdt, node_path), property, lenp); |
| 441 | if (!r) { |
Eric Auger | 78e24f2 | 2016-02-19 09:42:30 -0700 | [diff] [blame] | 442 | error_setg(errp, "%s: Couldn't get %s/%s: %s", __func__, |
| 443 | node_path, property, fdt_strerror(*lenp)); |
Peter Maydell | f0aa713 | 2012-07-20 13:34:50 +0100 | [diff] [blame] | 444 | } |
| 445 | return r; |
| 446 | } |
| 447 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 448 | uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path, |
Eric Auger | 58e7109 | 2016-02-19 09:42:30 -0700 | [diff] [blame] | 449 | const char *property, int *lenp, Error **errp) |
Peter Maydell | f0aa713 | 2012-07-20 13:34:50 +0100 | [diff] [blame] | 450 | { |
| 451 | int len; |
Eric Auger | 58e7109 | 2016-02-19 09:42:30 -0700 | [diff] [blame] | 452 | const uint32_t *p; |
| 453 | |
| 454 | if (!lenp) { |
| 455 | lenp = &len; |
| 456 | } |
| 457 | p = qemu_fdt_getprop(fdt, node_path, property, lenp, errp); |
| 458 | if (!p) { |
| 459 | return 0; |
| 460 | } else if (*lenp != 4) { |
| 461 | error_setg(errp, "%s: %s/%s not 4 bytes long (not a cell?)", |
| 462 | __func__, node_path, property); |
| 463 | *lenp = -EINVAL; |
| 464 | return 0; |
Peter Maydell | f0aa713 | 2012-07-20 13:34:50 +0100 | [diff] [blame] | 465 | } |
| 466 | return be32_to_cpu(*p); |
| 467 | } |
| 468 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 469 | uint32_t qemu_fdt_get_phandle(void *fdt, const char *path) |
Alexander Graf | 7d5fd10 | 2012-05-17 15:23:39 +0200 | [diff] [blame] | 470 | { |
| 471 | uint32_t r; |
| 472 | |
| 473 | r = fdt_get_phandle(fdt, findnode_nofail(fdt, path)); |
Stefan Weil | 909a196 | 2013-06-10 22:12:25 +0200 | [diff] [blame] | 474 | if (r == 0) { |
Li Liu | 508e221 | 2014-08-26 14:38:03 +0800 | [diff] [blame] | 475 | error_report("%s: Couldn't get phandle for %s: %s", __func__, |
| 476 | path, fdt_strerror(r)); |
Alexander Graf | 7d5fd10 | 2012-05-17 15:23:39 +0200 | [diff] [blame] | 477 | exit(1); |
| 478 | } |
| 479 | |
| 480 | return r; |
| 481 | } |
| 482 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 483 | int qemu_fdt_setprop_phandle(void *fdt, const char *node_path, |
| 484 | const char *property, |
| 485 | const char *target_node_path) |
Alexander Graf | 8535ab1 | 2012-05-17 14:11:52 +0200 | [diff] [blame] | 486 | { |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 487 | uint32_t phandle = qemu_fdt_get_phandle(fdt, target_node_path); |
| 488 | return qemu_fdt_setprop_cell(fdt, node_path, property, phandle); |
Alexander Graf | 8535ab1 | 2012-05-17 14:11:52 +0200 | [diff] [blame] | 489 | } |
| 490 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 491 | uint32_t qemu_fdt_alloc_phandle(void *fdt) |
Alexander Graf | 3601b57 | 2012-05-17 16:58:55 +0200 | [diff] [blame] | 492 | { |
Alexander Graf | 4b1b1c8 | 2012-06-06 01:01:23 +0200 | [diff] [blame] | 493 | static int phandle = 0x0; |
| 494 | |
| 495 | /* |
| 496 | * We need to find out if the user gave us special instruction at |
Kamalesh Babulal | cc47a16 | 2015-07-24 13:48:13 +0530 | [diff] [blame] | 497 | * which phandle id to start allocating phandles. |
Alexander Graf | 4b1b1c8 | 2012-06-06 01:01:23 +0200 | [diff] [blame] | 498 | */ |
| 499 | if (!phandle) { |
Marcel Apfelbaum | 6cabe7f | 2015-02-04 17:43:53 +0200 | [diff] [blame] | 500 | phandle = machine_phandle_start(current_machine); |
Alexander Graf | 4b1b1c8 | 2012-06-06 01:01:23 +0200 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | if (!phandle) { |
| 504 | /* |
| 505 | * None or invalid phandle given on the command line, so fall back to |
| 506 | * default starting point. |
| 507 | */ |
| 508 | phandle = 0x8000; |
| 509 | } |
Alexander Graf | 3601b57 | 2012-05-17 16:58:55 +0200 | [diff] [blame] | 510 | |
| 511 | return phandle++; |
| 512 | } |
| 513 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 514 | int qemu_fdt_nop_node(void *fdt, const char *node_path) |
Alexander Graf | d69a8e6 | 2011-07-21 01:52:57 +0200 | [diff] [blame] | 515 | { |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 516 | int r; |
Alexander Graf | d69a8e6 | 2011-07-21 01:52:57 +0200 | [diff] [blame] | 517 | |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 518 | r = fdt_nop_node(fdt, findnode_nofail(fdt, node_path)); |
| 519 | if (r < 0) { |
Li Liu | 508e221 | 2014-08-26 14:38:03 +0800 | [diff] [blame] | 520 | error_report("%s: Couldn't nop node %s: %s", __func__, node_path, |
| 521 | fdt_strerror(r)); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 522 | exit(1); |
| 523 | } |
Alexander Graf | d69a8e6 | 2011-07-21 01:52:57 +0200 | [diff] [blame] | 524 | |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 525 | return r; |
Alexander Graf | d69a8e6 | 2011-07-21 01:52:57 +0200 | [diff] [blame] | 526 | } |
Alexander Graf | 80ad781 | 2011-07-22 13:55:37 +0200 | [diff] [blame] | 527 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 528 | int qemu_fdt_add_subnode(void *fdt, const char *name) |
Alexander Graf | 80ad781 | 2011-07-22 13:55:37 +0200 | [diff] [blame] | 529 | { |
Alexander Graf | 80ad781 | 2011-07-22 13:55:37 +0200 | [diff] [blame] | 530 | char *dupname = g_strdup(name); |
| 531 | char *basename = strrchr(dupname, '/'); |
| 532 | int retval; |
Alexander Graf | c640d08 | 2012-05-17 11:40:42 +0200 | [diff] [blame] | 533 | int parent = 0; |
Alexander Graf | 80ad781 | 2011-07-22 13:55:37 +0200 | [diff] [blame] | 534 | |
| 535 | if (!basename) { |
Stefan Weil | bff39b6 | 2011-10-17 22:12:09 +0200 | [diff] [blame] | 536 | g_free(dupname); |
Alexander Graf | 80ad781 | 2011-07-22 13:55:37 +0200 | [diff] [blame] | 537 | return -1; |
| 538 | } |
| 539 | |
| 540 | basename[0] = '\0'; |
| 541 | basename++; |
| 542 | |
Alexander Graf | c640d08 | 2012-05-17 11:40:42 +0200 | [diff] [blame] | 543 | if (dupname[0]) { |
| 544 | parent = findnode_nofail(fdt, dupname); |
| 545 | } |
| 546 | |
| 547 | retval = fdt_add_subnode(fdt, parent, basename); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 548 | if (retval < 0) { |
Yanan Wang | b863f0b | 2021-10-20 22:21:19 +0800 | [diff] [blame] | 549 | error_report("%s: Failed to create subnode %s: %s", |
| 550 | __func__, name, fdt_strerror(retval)); |
Alexander Graf | ccbcfed | 2011-07-23 10:52:00 +0200 | [diff] [blame] | 551 | exit(1); |
Alexander Graf | 80ad781 | 2011-07-22 13:55:37 +0200 | [diff] [blame] | 552 | } |
| 553 | |
Alexander Graf | 80ad781 | 2011-07-22 13:55:37 +0200 | [diff] [blame] | 554 | g_free(dupname); |
| 555 | return retval; |
| 556 | } |
Alexander Graf | 7119343 | 2012-09-23 08:37:59 +0200 | [diff] [blame] | 557 | |
Yanan Wang | b863f0b | 2021-10-20 22:21:19 +0800 | [diff] [blame] | 558 | /* |
| 559 | * qemu_fdt_add_path: Like qemu_fdt_add_subnode(), but will add |
| 560 | * all missing subnodes from the given path. |
| 561 | */ |
| 562 | int qemu_fdt_add_path(void *fdt, const char *path) |
| 563 | { |
| 564 | const char *name; |
Yanan Wang | b863f0b | 2021-10-20 22:21:19 +0800 | [diff] [blame] | 565 | int namelen, retval; |
| 566 | int parent = 0; |
| 567 | |
| 568 | if (path[0] != '/') { |
| 569 | return -1; |
| 570 | } |
| 571 | |
Thomas Huth | cfeeeb4 | 2022-01-07 14:38:44 +0100 | [diff] [blame] | 572 | do { |
Yanan Wang | 22599b7 | 2022-01-11 11:27:58 +0800 | [diff] [blame] | 573 | name = path + 1; |
| 574 | path = strchr(name, '/'); |
| 575 | namelen = path != NULL ? path - name : strlen(name); |
Yanan Wang | b863f0b | 2021-10-20 22:21:19 +0800 | [diff] [blame] | 576 | |
| 577 | retval = fdt_subnode_offset_namelen(fdt, parent, name, namelen); |
| 578 | if (retval < 0 && retval != -FDT_ERR_NOTFOUND) { |
| 579 | error_report("%s: Unexpected error in finding subnode %.*s: %s", |
| 580 | __func__, namelen, name, fdt_strerror(retval)); |
| 581 | exit(1); |
| 582 | } else if (retval == -FDT_ERR_NOTFOUND) { |
| 583 | retval = fdt_add_subnode_namelen(fdt, parent, name, namelen); |
| 584 | if (retval < 0) { |
| 585 | error_report("%s: Failed to create subnode %.*s: %s", |
| 586 | __func__, namelen, name, fdt_strerror(retval)); |
| 587 | exit(1); |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | parent = retval; |
Yanan Wang | 22599b7 | 2022-01-11 11:27:58 +0800 | [diff] [blame] | 592 | } while (path); |
Yanan Wang | b863f0b | 2021-10-20 22:21:19 +0800 | [diff] [blame] | 593 | |
| 594 | return retval; |
| 595 | } |
| 596 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 597 | void qemu_fdt_dumpdtb(void *fdt, int size) |
Alexander Graf | 7119343 | 2012-09-23 08:37:59 +0200 | [diff] [blame] | 598 | { |
Paolo Bonzini | f2ce39b | 2020-11-02 09:44:36 -0500 | [diff] [blame] | 599 | const char *dumpdtb = current_machine->dumpdtb; |
Alexander Graf | 7119343 | 2012-09-23 08:37:59 +0200 | [diff] [blame] | 600 | |
Markus Armbruster | 2ff3de6 | 2013-07-04 15:09:22 +0200 | [diff] [blame] | 601 | if (dumpdtb) { |
| 602 | /* Dump the dtb to a file and quit */ |
Leonardo Bras | 9f252c7 | 2020-03-19 01:03:26 -0300 | [diff] [blame] | 603 | if (g_file_set_contents(dumpdtb, fdt, size, NULL)) { |
| 604 | info_report("dtb dumped to %s. Exiting.", dumpdtb); |
| 605 | exit(0); |
| 606 | } |
| 607 | error_report("%s: Failed dumping dtb to %s", __func__, dumpdtb); |
| 608 | exit(1); |
Alexander Graf | 7119343 | 2012-09-23 08:37:59 +0200 | [diff] [blame] | 609 | } |
Alexander Graf | 7119343 | 2012-09-23 08:37:59 +0200 | [diff] [blame] | 610 | } |
Peter Maydell | 97c38f8 | 2013-07-16 13:25:05 +0100 | [diff] [blame] | 611 | |
Peter Crosthwaite | 5a4348d | 2013-11-11 18:14:41 +1000 | [diff] [blame] | 612 | int qemu_fdt_setprop_sized_cells_from_array(void *fdt, |
| 613 | const char *node_path, |
| 614 | const char *property, |
| 615 | int numvalues, |
| 616 | uint64_t *values) |
Peter Maydell | 97c38f8 | 2013-07-16 13:25:05 +0100 | [diff] [blame] | 617 | { |
| 618 | uint32_t *propcells; |
| 619 | uint64_t value; |
| 620 | int cellnum, vnum, ncells; |
| 621 | uint32_t hival; |
Sergey Fedorov | 2bf9feb | 2014-12-11 18:45:05 +0300 | [diff] [blame] | 622 | int ret; |
Peter Maydell | 97c38f8 | 2013-07-16 13:25:05 +0100 | [diff] [blame] | 623 | |
| 624 | propcells = g_new0(uint32_t, numvalues * 2); |
| 625 | |
| 626 | cellnum = 0; |
| 627 | for (vnum = 0; vnum < numvalues; vnum++) { |
| 628 | ncells = values[vnum * 2]; |
| 629 | if (ncells != 1 && ncells != 2) { |
Sergey Fedorov | 2bf9feb | 2014-12-11 18:45:05 +0300 | [diff] [blame] | 630 | ret = -1; |
| 631 | goto out; |
Peter Maydell | 97c38f8 | 2013-07-16 13:25:05 +0100 | [diff] [blame] | 632 | } |
| 633 | value = values[vnum * 2 + 1]; |
| 634 | hival = cpu_to_be32(value >> 32); |
| 635 | if (ncells > 1) { |
| 636 | propcells[cellnum++] = hival; |
| 637 | } else if (hival != 0) { |
Sergey Fedorov | 2bf9feb | 2014-12-11 18:45:05 +0300 | [diff] [blame] | 638 | ret = -1; |
| 639 | goto out; |
Peter Maydell | 97c38f8 | 2013-07-16 13:25:05 +0100 | [diff] [blame] | 640 | } |
| 641 | propcells[cellnum++] = cpu_to_be32(value); |
| 642 | } |
| 643 | |
Sergey Fedorov | 2bf9feb | 2014-12-11 18:45:05 +0300 | [diff] [blame] | 644 | ret = qemu_fdt_setprop(fdt, node_path, property, propcells, |
| 645 | cellnum * sizeof(uint32_t)); |
| 646 | out: |
| 647 | g_free(propcells); |
| 648 | return ret; |
Peter Maydell | 97c38f8 | 2013-07-16 13:25:05 +0100 | [diff] [blame] | 649 | } |
Daniel Henrique Barboza | bf353ad | 2022-09-26 14:38:40 -0300 | [diff] [blame] | 650 | |
| 651 | void qmp_dumpdtb(const char *filename, Error **errp) |
| 652 | { |
| 653 | g_autoptr(GError) err = NULL; |
| 654 | uint32_t size; |
| 655 | |
| 656 | if (!current_machine->fdt) { |
| 657 | error_setg(errp, "This machine doesn't have a FDT"); |
| 658 | return; |
| 659 | } |
| 660 | |
| 661 | size = fdt_totalsize(current_machine->fdt); |
| 662 | |
| 663 | g_assert(size > 0); |
| 664 | |
| 665 | if (!g_file_set_contents(filename, current_machine->fdt, size, &err)) { |
| 666 | error_setg(errp, "Error saving FDT to file %s: %s", |
| 667 | filename, err->message); |
| 668 | } |
| 669 | } |
| 670 | |
Jason A. Donenfeld | e1e618b | 2022-10-25 02:43:18 +0200 | [diff] [blame] | 671 | void qemu_fdt_randomize_seeds(void *fdt) |
| 672 | { |
| 673 | int noffset, poffset, len; |
| 674 | const char *name; |
| 675 | uint8_t *data; |
| 676 | |
| 677 | for (noffset = fdt_next_node(fdt, 0, NULL); |
| 678 | noffset >= 0; |
| 679 | noffset = fdt_next_node(fdt, noffset, NULL)) { |
| 680 | for (poffset = fdt_first_property_offset(fdt, noffset); |
| 681 | poffset >= 0; |
| 682 | poffset = fdt_next_property_offset(fdt, poffset)) { |
| 683 | data = (uint8_t *)fdt_getprop_by_offset(fdt, poffset, &name, &len); |
| 684 | if (!data || strcmp(name, "rng-seed")) |
| 685 | continue; |
| 686 | qemu_guest_getrandom_nofail(data, len); |
| 687 | } |
| 688 | } |
| 689 | } |