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"
31 #include "hw/qdev-core.h"
33 typedef struct FWBootEntry FWBootEntry;
36 QTAILQ_ENTRY(FWBootEntry) link;
42 static QTAILQ_HEAD(, FWBootEntry) fw_boot_order =
43 QTAILQ_HEAD_INITIALIZER(fw_boot_order);
44 static QEMUBootSetHandler *boot_set_handler;
45 static void *boot_set_opaque;
47 void qemu_register_boot_set(QEMUBootSetHandler *func, void *opaque)
49 boot_set_handler = func;
50 boot_set_opaque = opaque;
53 void qemu_boot_set(const char *boot_order, Error **errp)
55 Error *local_err = NULL;
57 if (!boot_set_handler) {
58 error_setg(errp, "no function defined to set boot device list for"
59 " this architecture");
63 validate_bootdevices(boot_order, &local_err);
65 error_propagate(errp, local_err);
69 boot_set_handler(boot_set_opaque, boot_order, errp);
72 void validate_bootdevices(const char *devices, Error **errp)
74 /* We just do some generic consistency checks */
78 for (p = devices; *p != '\0'; p++) {
79 /* Allowed boot devices are:
80 * a-b: floppy disk drives
81 * c-f: IDE disk drives
82 * g-m: machine implementation dependent drives
83 * n-p: network devices
84 * It's up to each machine implementation to check if the given boot
85 * devices match the actual hardware implementation and firmware
88 if (*p < 'a' || *p > 'p') {
89 error_setg(errp, "Invalid boot device '%c'", *p);
92 if (bitmap & (1 << (*p - 'a'))) {
93 error_setg(errp, "Boot device '%c' was given twice", *p);
96 bitmap |= 1 << (*p - 'a');
100 void restore_boot_order(void *opaque)
102 char *normal_boot_order = opaque;
103 static int first = 1;
105 /* Restore boot order and remove ourselves after the first boot */
111 if (boot_set_handler) {
112 qemu_boot_set(normal_boot_order, &error_abort);
115 qemu_unregister_reset(restore_boot_order, normal_boot_order);
116 g_free(normal_boot_order);
119 void check_boot_index(int32_t bootindex, Error **errp)
123 if (bootindex >= 0) {
124 QTAILQ_FOREACH(i, &fw_boot_order, link) {
125 if (i->bootindex == bootindex) {
126 error_setg(errp, "The bootindex %d has already been used",
134 void del_boot_device_path(DeviceState *dev, const char *suffix)
142 QTAILQ_FOREACH(i, &fw_boot_order, link) {
143 if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
145 QTAILQ_REMOVE(&fw_boot_order, i, link);
154 void add_boot_device_path(int32_t bootindex, DeviceState *dev,
157 FWBootEntry *node, *i;
160 del_boot_device_path(dev, suffix);
164 assert(dev != NULL || suffix != NULL);
166 del_boot_device_path(dev, suffix);
168 node = g_malloc0(sizeof(FWBootEntry));
169 node->bootindex = bootindex;
170 node->suffix = g_strdup(suffix);
173 QTAILQ_FOREACH(i, &fw_boot_order, link) {
174 if (i->bootindex == bootindex) {
175 error_report("Two devices with same boot index %d", bootindex);
177 } else if (i->bootindex < bootindex) {
180 QTAILQ_INSERT_BEFORE(i, node, link);
183 QTAILQ_INSERT_TAIL(&fw_boot_order, node, link);
186 DeviceState *get_boot_device(uint32_t position)
188 uint32_t counter = 0;
189 FWBootEntry *i = NULL;
190 DeviceState *res = NULL;
192 if (!QTAILQ_EMPTY(&fw_boot_order)) {
193 QTAILQ_FOREACH(i, &fw_boot_order, link) {
194 if (counter == position) {
205 * This function returns null terminated string that consist of new line
206 * separated device paths.
208 * memory pointed by "size" is assigned total length of the array in bytes
211 char *get_boot_devices_list(size_t *size, bool ignore_suffixes)
217 QTAILQ_FOREACH(i, &fw_boot_order, link) {
218 char *devpath = NULL, *suffix = NULL;
224 devpath = qdev_get_fw_dev_path(i->dev);
228 if (!ignore_suffixes) {
230 d = qdev_get_own_fw_dev_path_from_handler(i->dev->parent_bus,
236 suffix = g_strdup(i->suffix);
239 suffix = g_strdup(i->suffix);
243 bootpath = g_strdup_printf("%s%s",
244 devpath ? devpath : "",
245 suffix ? suffix : "");
250 list[total-1] = '\n';
252 len = strlen(bootpath) + 1;
253 list = g_realloc(list, total + len);
254 memcpy(&list[total], bootpath, len);
261 if (boot_strict && *size > 0) {
262 list[total-1] = '\n';
263 list = g_realloc(list, total + 5);
264 memcpy(&list[total], "HALT", 5);
276 static void device_get_bootindex(Object *obj, Visitor *v, const char *name,
277 void *opaque, Error **errp)
279 BootIndexProperty *prop = opaque;
280 visit_type_int32(v, name, prop->bootindex, errp);
283 static void device_set_bootindex(Object *obj, Visitor *v, const char *name,
284 void *opaque, Error **errp)
286 BootIndexProperty *prop = opaque;
288 Error *local_err = NULL;
290 visit_type_int32(v, name, &boot_index, &local_err);
294 /* check whether bootindex is present in fw_boot_order list */
295 check_boot_index(boot_index, &local_err);
299 /* change bootindex to a new one */
300 *prop->bootindex = boot_index;
302 add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix);
305 error_propagate(errp, local_err);
308 static void property_release_bootindex(Object *obj, const char *name,
312 BootIndexProperty *prop = opaque;
314 del_boot_device_path(prop->dev, prop->suffix);
318 void device_add_bootindex_property(Object *obj, int32_t *bootindex,
319 const char *name, const char *suffix,
320 DeviceState *dev, Error **errp)
322 Error *local_err = NULL;
323 BootIndexProperty *prop = g_malloc0(sizeof(*prop));
325 prop->bootindex = bootindex;
326 prop->suffix = suffix;
329 object_property_add(obj, name, "int32",
330 device_get_bootindex,
331 device_set_bootindex,
332 property_release_bootindex,
336 error_propagate(errp, local_err);
340 /* initialize devices' bootindex property to -1 */
341 object_property_set_int(obj, -1, name, NULL);