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 "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 int qemu_boot_set(const char *boot_order
)
52 if (!boot_set_handler
) {
55 return boot_set_handler(boot_set_opaque
, boot_order
);
58 void validate_bootdevices(const char *devices
)
60 /* We just do some generic consistency checks */
64 for (p
= devices
; *p
!= '\0'; p
++) {
65 /* Allowed boot devices are:
66 * a-b: floppy disk drives
67 * c-f: IDE disk drives
68 * g-m: machine implementation dependent drives
69 * n-p: network devices
70 * It's up to each machine implementation to check if the given boot
71 * devices match the actual hardware implementation and firmware
74 if (*p
< 'a' || *p
> 'p') {
75 fprintf(stderr
, "Invalid boot device '%c'\n", *p
);
78 if (bitmap
& (1 << (*p
- 'a'))) {
79 fprintf(stderr
, "Boot device '%c' was given twice\n", *p
);
82 bitmap
|= 1 << (*p
- 'a');
86 void restore_boot_order(void *opaque
)
88 char *normal_boot_order
= opaque
;
91 /* Restore boot order and remove ourselves after the first boot */
97 qemu_boot_set(normal_boot_order
);
99 qemu_unregister_reset(restore_boot_order
, normal_boot_order
);
100 g_free(normal_boot_order
);
103 void check_boot_index(int32_t bootindex
, Error
**errp
)
107 if (bootindex
>= 0) {
108 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
109 if (i
->bootindex
== bootindex
) {
110 error_setg(errp
, "The bootindex %d has already been used",
118 void del_boot_device_path(DeviceState
*dev
, const char *suffix
)
126 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
127 if ((!suffix
|| !g_strcmp0(i
->suffix
, suffix
)) &&
129 QTAILQ_REMOVE(&fw_boot_order
, i
, link
);
138 void add_boot_device_path(int32_t bootindex
, DeviceState
*dev
,
141 FWBootEntry
*node
, *i
;
144 del_boot_device_path(dev
, suffix
);
148 assert(dev
!= NULL
|| suffix
!= NULL
);
150 del_boot_device_path(dev
, suffix
);
152 node
= g_malloc0(sizeof(FWBootEntry
));
153 node
->bootindex
= bootindex
;
154 node
->suffix
= g_strdup(suffix
);
157 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
158 if (i
->bootindex
== bootindex
) {
159 error_report("Two devices with same boot index %d", bootindex
);
161 } else if (i
->bootindex
< bootindex
) {
164 QTAILQ_INSERT_BEFORE(i
, node
, link
);
167 QTAILQ_INSERT_TAIL(&fw_boot_order
, node
, link
);
170 DeviceState
*get_boot_device(uint32_t position
)
172 uint32_t counter
= 0;
173 FWBootEntry
*i
= NULL
;
174 DeviceState
*res
= NULL
;
176 if (!QTAILQ_EMPTY(&fw_boot_order
)) {
177 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
178 if (counter
== position
) {
189 * This function returns null terminated string that consist of new line
190 * separated device paths.
192 * memory pointed by "size" is assigned total length of the array in bytes
195 char *get_boot_devices_list(size_t *size
, bool ignore_suffixes
)
201 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
202 char *devpath
= NULL
, *bootpath
;
206 devpath
= qdev_get_fw_dev_path(i
->dev
);
210 if (i
->suffix
&& !ignore_suffixes
&& devpath
) {
211 size_t bootpathlen
= strlen(devpath
) + strlen(i
->suffix
) + 1;
213 bootpath
= g_malloc(bootpathlen
);
214 snprintf(bootpath
, bootpathlen
, "%s%s", devpath
, i
->suffix
);
216 } else if (devpath
) {
218 } else if (!ignore_suffixes
) {
220 bootpath
= g_strdup(i
->suffix
);
222 bootpath
= g_strdup("");
226 list
[total
-1] = '\n';
228 len
= strlen(bootpath
) + 1;
229 list
= g_realloc(list
, total
+ len
);
230 memcpy(&list
[total
], bootpath
, len
);
237 if (boot_strict
&& *size
> 0) {
238 list
[total
-1] = '\n';
239 list
= g_realloc(list
, total
+ 5);
240 memcpy(&list
[total
], "HALT", 5);
252 static void device_get_bootindex(Object
*obj
, Visitor
*v
, void *opaque
,
253 const char *name
, Error
**errp
)
255 BootIndexProperty
*prop
= opaque
;
256 visit_type_int32(v
, prop
->bootindex
, name
, errp
);
259 static void device_set_bootindex(Object
*obj
, Visitor
*v
, void *opaque
,
260 const char *name
, Error
**errp
)
262 BootIndexProperty
*prop
= opaque
;
264 Error
*local_err
= NULL
;
266 visit_type_int32(v
, &boot_index
, name
, &local_err
);
270 /* check whether bootindex is present in fw_boot_order list */
271 check_boot_index(boot_index
, &local_err
);
275 /* change bootindex to a new one */
276 *prop
->bootindex
= boot_index
;
278 add_boot_device_path(*prop
->bootindex
, prop
->dev
, prop
->suffix
);
282 error_propagate(errp
, local_err
);
286 static void property_release_bootindex(Object
*obj
, const char *name
,
290 BootIndexProperty
*prop
= opaque
;
292 del_boot_device_path(prop
->dev
, prop
->suffix
);
296 void device_add_bootindex_property(Object
*obj
, int32_t *bootindex
,
297 const char *name
, const char *suffix
,
298 DeviceState
*dev
, Error
**errp
)
300 Error
*local_err
= NULL
;
301 BootIndexProperty
*prop
= g_malloc0(sizeof(*prop
));
303 prop
->bootindex
= bootindex
;
304 prop
->suffix
= suffix
;
307 object_property_add(obj
, name
, "int32",
308 device_get_bootindex
,
309 device_set_bootindex
,
310 property_release_bootindex
,
314 error_propagate(errp
, local_err
);
318 /* initialize devices' bootindex property to -1 */
319 object_property_set_int(obj
, -1, name
, NULL
);