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
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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
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25 #include "sysemu/sysemu.h"
26 #include "qapi/visitor.h"
27 #include "qemu/error-report.h"
30 typedef struct FWBootEntry FWBootEntry;
33 QTAILQ_ENTRY(FWBootEntry) link;
39 static QTAILQ_HEAD(, FWBootEntry) fw_boot_order =
40 QTAILQ_HEAD_INITIALIZER(fw_boot_order);
41 static QEMUBootSetHandler *boot_set_handler;
42 static void *boot_set_opaque;
44 void qemu_register_boot_set(QEMUBootSetHandler *func, void *opaque)
46 boot_set_handler = func;
47 boot_set_opaque = opaque;
50 void qemu_boot_set(const char *boot_order, Error **errp)
52 Error *local_err = NULL;
54 if (!boot_set_handler) {
55 error_setg(errp, "no function defined to set boot device list for"
56 " this architecture");
60 validate_bootdevices(boot_order, &local_err);
62 error_propagate(errp, local_err);
66 if (boot_set_handler(boot_set_opaque, boot_order)) {
67 error_setg(errp, "setting boot device list failed");
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 qemu_boot_set(normal_boot_order, NULL);
113 qemu_unregister_reset(restore_boot_order, normal_boot_order);
114 g_free(normal_boot_order);
117 void check_boot_index(int32_t bootindex, Error **errp)
121 if (bootindex >= 0) {
122 QTAILQ_FOREACH(i, &fw_boot_order, link) {
123 if (i->bootindex == bootindex) {
124 error_setg(errp, "The bootindex %d has already been used",
132 void del_boot_device_path(DeviceState *dev, const char *suffix)
140 QTAILQ_FOREACH(i, &fw_boot_order, link) {
141 if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
143 QTAILQ_REMOVE(&fw_boot_order, i, link);
152 void add_boot_device_path(int32_t bootindex, DeviceState *dev,
155 FWBootEntry *node, *i;
158 del_boot_device_path(dev, suffix);
162 assert(dev != NULL || suffix != NULL);
164 del_boot_device_path(dev, suffix);
166 node = g_malloc0(sizeof(FWBootEntry));
167 node->bootindex = bootindex;
168 node->suffix = g_strdup(suffix);
171 QTAILQ_FOREACH(i, &fw_boot_order, link) {
172 if (i->bootindex == bootindex) {
173 error_report("Two devices with same boot index %d", bootindex);
175 } else if (i->bootindex < bootindex) {
178 QTAILQ_INSERT_BEFORE(i, node, link);
181 QTAILQ_INSERT_TAIL(&fw_boot_order, node, link);
184 DeviceState *get_boot_device(uint32_t position)
186 uint32_t counter = 0;
187 FWBootEntry *i = NULL;
188 DeviceState *res = NULL;
190 if (!QTAILQ_EMPTY(&fw_boot_order)) {
191 QTAILQ_FOREACH(i, &fw_boot_order, link) {
192 if (counter == position) {
203 * This function returns null terminated string that consist of new line
204 * separated device paths.
206 * memory pointed by "size" is assigned total length of the array in bytes
209 char *get_boot_devices_list(size_t *size, bool ignore_suffixes)
215 QTAILQ_FOREACH(i, &fw_boot_order, link) {
216 char *devpath = NULL, *bootpath;
220 devpath = qdev_get_fw_dev_path(i->dev);
224 if (i->suffix && !ignore_suffixes && devpath) {
225 size_t bootpathlen = strlen(devpath) + strlen(i->suffix) + 1;
227 bootpath = g_malloc(bootpathlen);
228 snprintf(bootpath, bootpathlen, "%s%s", devpath, i->suffix);
230 } else if (devpath) {
232 } else if (!ignore_suffixes) {
234 bootpath = g_strdup(i->suffix);
236 bootpath = g_strdup("");
240 list[total-1] = '\n';
242 len = strlen(bootpath) + 1;
243 list = g_realloc(list, total + len);
244 memcpy(&list[total], bootpath, len);
251 if (boot_strict && *size > 0) {
252 list[total-1] = '\n';
253 list = g_realloc(list, total + 5);
254 memcpy(&list[total], "HALT", 5);
266 static void device_get_bootindex(Object *obj, Visitor *v, void *opaque,
267 const char *name, Error **errp)
269 BootIndexProperty *prop = opaque;
270 visit_type_int32(v, prop->bootindex, name, errp);
273 static void device_set_bootindex(Object *obj, Visitor *v, void *opaque,
274 const char *name, Error **errp)
276 BootIndexProperty *prop = opaque;
278 Error *local_err = NULL;
280 visit_type_int32(v, &boot_index, name, &local_err);
284 /* check whether bootindex is present in fw_boot_order list */
285 check_boot_index(boot_index, &local_err);
289 /* change bootindex to a new one */
290 *prop->bootindex = boot_index;
292 add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix);
296 error_propagate(errp, local_err);
300 static void property_release_bootindex(Object *obj, const char *name,
304 BootIndexProperty *prop = opaque;
306 del_boot_device_path(prop->dev, prop->suffix);
310 void device_add_bootindex_property(Object *obj, int32_t *bootindex,
311 const char *name, const char *suffix,
312 DeviceState *dev, Error **errp)
314 Error *local_err = NULL;
315 BootIndexProperty *prop = g_malloc0(sizeof(*prop));
317 prop->bootindex = bootindex;
318 prop->suffix = suffix;
321 object_property_add(obj, name, "int32",
322 device_get_bootindex,
323 device_set_bootindex,
324 property_release_bootindex,
328 error_propagate(errp, local_err);
332 /* initialize devices' bootindex property to -1 */
333 object_property_set_int(obj, -1, name, NULL);