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 void qemu_boot_set(const char *boot_order
, Error
**errp
)
52 if (!boot_set_handler
) {
53 error_setg(errp
, "no function defined to set boot device list for"
54 " this architecture");
58 if (boot_set_handler(boot_set_opaque
, boot_order
)) {
59 error_setg(errp
, "setting boot device list failed");
64 void validate_bootdevices(const char *devices
, Error
**errp
)
66 /* We just do some generic consistency checks */
70 for (p
= devices
; *p
!= '\0'; p
++) {
71 /* Allowed boot devices are:
72 * a-b: floppy disk drives
73 * c-f: IDE disk drives
74 * g-m: machine implementation dependent drives
75 * n-p: network devices
76 * It's up to each machine implementation to check if the given boot
77 * devices match the actual hardware implementation and firmware
80 if (*p
< 'a' || *p
> 'p') {
81 error_setg(errp
, "Invalid boot device '%c'", *p
);
84 if (bitmap
& (1 << (*p
- 'a'))) {
85 error_setg(errp
, "Boot device '%c' was given twice", *p
);
88 bitmap
|= 1 << (*p
- 'a');
92 void restore_boot_order(void *opaque
)
94 char *normal_boot_order
= opaque
;
97 /* Restore boot order and remove ourselves after the first boot */
103 qemu_boot_set(normal_boot_order
, NULL
);
105 qemu_unregister_reset(restore_boot_order
, normal_boot_order
);
106 g_free(normal_boot_order
);
109 void check_boot_index(int32_t bootindex
, Error
**errp
)
113 if (bootindex
>= 0) {
114 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
115 if (i
->bootindex
== bootindex
) {
116 error_setg(errp
, "The bootindex %d has already been used",
124 void del_boot_device_path(DeviceState
*dev
, const char *suffix
)
132 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
133 if ((!suffix
|| !g_strcmp0(i
->suffix
, suffix
)) &&
135 QTAILQ_REMOVE(&fw_boot_order
, i
, link
);
144 void add_boot_device_path(int32_t bootindex
, DeviceState
*dev
,
147 FWBootEntry
*node
, *i
;
150 del_boot_device_path(dev
, suffix
);
154 assert(dev
!= NULL
|| suffix
!= NULL
);
156 del_boot_device_path(dev
, suffix
);
158 node
= g_malloc0(sizeof(FWBootEntry
));
159 node
->bootindex
= bootindex
;
160 node
->suffix
= g_strdup(suffix
);
163 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
164 if (i
->bootindex
== bootindex
) {
165 error_report("Two devices with same boot index %d", bootindex
);
167 } else if (i
->bootindex
< bootindex
) {
170 QTAILQ_INSERT_BEFORE(i
, node
, link
);
173 QTAILQ_INSERT_TAIL(&fw_boot_order
, node
, link
);
176 DeviceState
*get_boot_device(uint32_t position
)
178 uint32_t counter
= 0;
179 FWBootEntry
*i
= NULL
;
180 DeviceState
*res
= NULL
;
182 if (!QTAILQ_EMPTY(&fw_boot_order
)) {
183 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
184 if (counter
== position
) {
195 * This function returns null terminated string that consist of new line
196 * separated device paths.
198 * memory pointed by "size" is assigned total length of the array in bytes
201 char *get_boot_devices_list(size_t *size
, bool ignore_suffixes
)
207 QTAILQ_FOREACH(i
, &fw_boot_order
, link
) {
208 char *devpath
= NULL
, *bootpath
;
212 devpath
= qdev_get_fw_dev_path(i
->dev
);
216 if (i
->suffix
&& !ignore_suffixes
&& devpath
) {
217 size_t bootpathlen
= strlen(devpath
) + strlen(i
->suffix
) + 1;
219 bootpath
= g_malloc(bootpathlen
);
220 snprintf(bootpath
, bootpathlen
, "%s%s", devpath
, i
->suffix
);
222 } else if (devpath
) {
224 } else if (!ignore_suffixes
) {
226 bootpath
= g_strdup(i
->suffix
);
228 bootpath
= g_strdup("");
232 list
[total
-1] = '\n';
234 len
= strlen(bootpath
) + 1;
235 list
= g_realloc(list
, total
+ len
);
236 memcpy(&list
[total
], bootpath
, len
);
243 if (boot_strict
&& *size
> 0) {
244 list
[total
-1] = '\n';
245 list
= g_realloc(list
, total
+ 5);
246 memcpy(&list
[total
], "HALT", 5);
258 static void device_get_bootindex(Object
*obj
, Visitor
*v
, void *opaque
,
259 const char *name
, Error
**errp
)
261 BootIndexProperty
*prop
= opaque
;
262 visit_type_int32(v
, prop
->bootindex
, name
, errp
);
265 static void device_set_bootindex(Object
*obj
, Visitor
*v
, void *opaque
,
266 const char *name
, Error
**errp
)
268 BootIndexProperty
*prop
= opaque
;
270 Error
*local_err
= NULL
;
272 visit_type_int32(v
, &boot_index
, name
, &local_err
);
276 /* check whether bootindex is present in fw_boot_order list */
277 check_boot_index(boot_index
, &local_err
);
281 /* change bootindex to a new one */
282 *prop
->bootindex
= boot_index
;
284 add_boot_device_path(*prop
->bootindex
, prop
->dev
, prop
->suffix
);
288 error_propagate(errp
, local_err
);
292 static void property_release_bootindex(Object
*obj
, const char *name
,
296 BootIndexProperty
*prop
= opaque
;
298 del_boot_device_path(prop
->dev
, prop
->suffix
);
302 void device_add_bootindex_property(Object
*obj
, int32_t *bootindex
,
303 const char *name
, const char *suffix
,
304 DeviceState
*dev
, Error
**errp
)
306 Error
*local_err
= NULL
;
307 BootIndexProperty
*prop
= g_malloc0(sizeof(*prop
));
309 prop
->bootindex
= bootindex
;
310 prop
->suffix
= suffix
;
313 object_property_add(obj
, name
, "int32",
314 device_get_bootindex
,
315 device_set_bootindex
,
316 property_release_bootindex
,
320 error_propagate(errp
, local_err
);
324 /* initialize devices' bootindex property to -1 */
325 object_property_set_int(obj
, -1, name
, NULL
);