2 * QEMU Boot Device Implement
4 * Copyright (c) 2014 HUAWEI TECHNOLOGIES CO., LTD.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 #include "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "sysemu/sysemu.h"
28 #include "qapi/visitor.h"
29 #include "qemu/error-report.h"
32 typedef struct FWBootEntry FWBootEntry;
35 QTAILQ_ENTRY(FWBootEntry) link;
41 static QTAILQ_HEAD(, FWBootEntry) fw_boot_order =
42 QTAILQ_HEAD_INITIALIZER(fw_boot_order);
43 static QEMUBootSetHandler *boot_set_handler;
44 static void *boot_set_opaque;
46 void qemu_register_boot_set(QEMUBootSetHandler *func, void *opaque)
48 boot_set_handler = func;
49 boot_set_opaque = opaque;
52 void qemu_boot_set(const char *boot_order, Error **errp)
54 Error *local_err = NULL;
56 if (!boot_set_handler) {
57 error_setg(errp, "no function defined to set boot device list for"
58 " this architecture");
62 validate_bootdevices(boot_order, &local_err);
64 error_propagate(errp, local_err);
68 boot_set_handler(boot_set_opaque, boot_order, errp);
71 void validate_bootdevices(const char *devices, Error **errp)
73 /* We just do some generic consistency checks */
77 for (p = devices; *p != '\0'; p++) {
78 /* Allowed boot devices are:
79 * a-b: floppy disk drives
80 * c-f: IDE disk drives
81 * g-m: machine implementation dependent drives
82 * n-p: network devices
83 * It's up to each machine implementation to check if the given boot
84 * devices match the actual hardware implementation and firmware
87 if (*p < 'a' || *p > 'p') {
88 error_setg(errp, "Invalid boot device '%c'", *p);
91 if (bitmap & (1 << (*p - 'a'))) {
92 error_setg(errp, "Boot device '%c' was given twice", *p);
95 bitmap |= 1 << (*p - 'a');
99 void restore_boot_order(void *opaque)
101 char *normal_boot_order = opaque;
102 static int first = 1;
104 /* Restore boot order and remove ourselves after the first boot */
110 if (boot_set_handler) {
111 qemu_boot_set(normal_boot_order, &error_abort);
114 qemu_unregister_reset(restore_boot_order, normal_boot_order);
115 g_free(normal_boot_order);
118 void check_boot_index(int32_t bootindex, Error **errp)
122 if (bootindex >= 0) {
123 QTAILQ_FOREACH(i, &fw_boot_order, link) {
124 if (i->bootindex == bootindex) {
125 error_setg(errp, "The bootindex %d has already been used",
133 void del_boot_device_path(DeviceState *dev, const char *suffix)
141 QTAILQ_FOREACH(i, &fw_boot_order, link) {
142 if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
144 QTAILQ_REMOVE(&fw_boot_order, i, link);
153 void add_boot_device_path(int32_t bootindex, DeviceState *dev,
156 FWBootEntry *node, *i;
159 del_boot_device_path(dev, suffix);
163 assert(dev != NULL || suffix != NULL);
165 del_boot_device_path(dev, suffix);
167 node = g_malloc0(sizeof(FWBootEntry));
168 node->bootindex = bootindex;
169 node->suffix = g_strdup(suffix);
172 QTAILQ_FOREACH(i, &fw_boot_order, link) {
173 if (i->bootindex == bootindex) {
174 error_report("Two devices with same boot index %d", bootindex);
176 } else if (i->bootindex < bootindex) {
179 QTAILQ_INSERT_BEFORE(i, node, link);
182 QTAILQ_INSERT_TAIL(&fw_boot_order, node, link);
185 DeviceState *get_boot_device(uint32_t position)
187 uint32_t counter = 0;
188 FWBootEntry *i = NULL;
189 DeviceState *res = NULL;
191 if (!QTAILQ_EMPTY(&fw_boot_order)) {
192 QTAILQ_FOREACH(i, &fw_boot_order, link) {
193 if (counter == position) {
204 * This function returns null terminated string that consist of new line
205 * separated device paths.
207 * memory pointed by "size" is assigned total length of the array in bytes
210 char *get_boot_devices_list(size_t *size, bool ignore_suffixes)
216 QTAILQ_FOREACH(i, &fw_boot_order, link) {
217 char *devpath = NULL, *suffix = NULL;
223 devpath = qdev_get_fw_dev_path(i->dev);
227 if (!ignore_suffixes) {
229 d = qdev_get_own_fw_dev_path_from_handler(i->dev->parent_bus,
235 suffix = g_strdup(i->suffix);
238 suffix = g_strdup(i->suffix);
242 bootpath = g_strdup_printf("%s%s",
243 devpath ? devpath : "",
244 suffix ? suffix : "");
249 list[total-1] = '\n';
251 len = strlen(bootpath) + 1;
252 list = g_realloc(list, total + len);
253 memcpy(&list[total], bootpath, len);
260 if (boot_strict && *size > 0) {
261 list[total-1] = '\n';
262 list = g_realloc(list, total + 5);
263 memcpy(&list[total], "HALT", 5);
275 static void device_get_bootindex(Object *obj, Visitor *v, const char *name,
276 void *opaque, Error **errp)
278 BootIndexProperty *prop = opaque;
279 visit_type_int32(v, name, prop->bootindex, errp);
282 static void device_set_bootindex(Object *obj, Visitor *v, const char *name,
283 void *opaque, Error **errp)
285 BootIndexProperty *prop = opaque;
287 Error *local_err = NULL;
289 visit_type_int32(v, name, &boot_index, &local_err);
293 /* check whether bootindex is present in fw_boot_order list */
294 check_boot_index(boot_index, &local_err);
298 /* change bootindex to a new one */
299 *prop->bootindex = boot_index;
301 add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix);
305 error_propagate(errp, local_err);
309 static void property_release_bootindex(Object *obj, const char *name,
313 BootIndexProperty *prop = opaque;
315 del_boot_device_path(prop->dev, prop->suffix);
319 void device_add_bootindex_property(Object *obj, int32_t *bootindex,
320 const char *name, const char *suffix,
321 DeviceState *dev, Error **errp)
323 Error *local_err = NULL;
324 BootIndexProperty *prop = g_malloc0(sizeof(*prop));
326 prop->bootindex = bootindex;
327 prop->suffix = suffix;
330 object_property_add(obj, name, "int32",
331 device_get_bootindex,
332 device_set_bootindex,
333 property_release_bootindex,
337 error_propagate(errp, local_err);
341 /* initialize devices' bootindex property to -1 */
342 object_property_set_int(obj, -1, name, NULL);