1 /*
2 * SMBIOS Support
3 *
4 * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
5 *
6 * Authors:
7 * Alex Williamson <alex.williamson@hp.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 */
13
14 #include "sysemu.h"
15 #include "smbios.h"
16
17 /*
18 * Structures shared with the BIOS
19 */
20 struct smbios_header {
21 uint16_t length;
22 uint8_t type;
23 } __attribute__((__packed__));
24
25 struct smbios_field {
26 struct smbios_header header;
27 uint8_t type;
28 uint16_t offset;
29 uint8_t data[];
30 } __attribute__((__packed__));
31
32 struct smbios_table {
33 struct smbios_header header;
34 uint8_t data[];
35 } __attribute__((__packed__));
36
37 #define SMBIOS_FIELD_ENTRY 0
38 #define SMBIOS_TABLE_ENTRY 1
39
40
41 static uint8_t *smbios_entries;
42 static size_t smbios_entries_len;
43
smbios_get_table(size_t * length)44 uint8_t *smbios_get_table(size_t *length)
45 {
46 *length = smbios_entries_len;
47 return smbios_entries;
48 }
49
50 /*
51 * To avoid unresolvable overlaps in data, don't allow both
52 * tables and fields for the same smbios type.
53 */
smbios_check_collision(int type,int entry)54 static void smbios_check_collision(int type, int entry)
55 {
56 uint16_t *num_entries = (uint16_t *)smbios_entries;
57 struct smbios_header *header;
58 char *p;
59 int i;
60
61 if (!num_entries)
62 return;
63
64 p = (char *)(num_entries + 1);
65
66 for (i = 0; i < *num_entries; i++) {
67 header = (struct smbios_header *)p;
68 if (entry == SMBIOS_TABLE_ENTRY && header->type == SMBIOS_FIELD_ENTRY) {
69 struct smbios_field *field = (void *)header;
70 if (type == field->type) {
71 fprintf(stderr, "SMBIOS type %d field already defined, "
72 "cannot add table\n", type);
73 exit(1);
74 }
75 } else if (entry == SMBIOS_FIELD_ENTRY &&
76 header->type == SMBIOS_TABLE_ENTRY) {
77 struct smbios_structure_header *table = (void *)(header + 1);
78 if (type == table->type) {
79 fprintf(stderr, "SMBIOS type %d table already defined, "
80 "cannot add field\n", type);
81 exit(1);
82 }
83 }
84 p += le16_to_cpu(header->length);
85 }
86 }
87
smbios_add_field(int type,int offset,int len,void * data)88 void smbios_add_field(int type, int offset, int len, void *data)
89 {
90 struct smbios_field *field;
91
92 smbios_check_collision(type, SMBIOS_FIELD_ENTRY);
93
94 if (!smbios_entries) {
95 smbios_entries_len = sizeof(uint16_t);
96 smbios_entries = qemu_mallocz(smbios_entries_len);
97 }
98 smbios_entries = qemu_realloc(smbios_entries, smbios_entries_len +
99 sizeof(*field) + len);
100 field = (struct smbios_field *)(smbios_entries + smbios_entries_len);
101 field->header.type = SMBIOS_FIELD_ENTRY;
102 field->header.length = cpu_to_le16(sizeof(*field) + len);
103
104 field->type = type;
105 field->offset = cpu_to_le16(offset);
106 memcpy(field->data, data, len);
107
108 smbios_entries_len += sizeof(*field) + len;
109 (*(uint16_t *)smbios_entries) =
110 cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
111 }
112
smbios_build_type_0_fields(const char * t)113 static void smbios_build_type_0_fields(const char *t)
114 {
115 char buf[1024];
116
117 if (get_param_value(buf, sizeof(buf), "vendor", t))
118 smbios_add_field(0, offsetof(struct smbios_type_0, vendor_str),
119 strlen(buf) + 1, buf);
120 if (get_param_value(buf, sizeof(buf), "version", t))
121 smbios_add_field(0, offsetof(struct smbios_type_0, bios_version_str),
122 strlen(buf) + 1, buf);
123 if (get_param_value(buf, sizeof(buf), "date", t))
124 smbios_add_field(0, offsetof(struct smbios_type_0,
125 bios_release_date_str),
126 strlen(buf) + 1, buf);
127 if (get_param_value(buf, sizeof(buf), "release", t)) {
128 int major, minor;
129 sscanf(buf, "%d.%d", &major, &minor);
130 smbios_add_field(0, offsetof(struct smbios_type_0,
131 system_bios_major_release), 1, &major);
132 smbios_add_field(0, offsetof(struct smbios_type_0,
133 system_bios_minor_release), 1, &minor);
134 }
135 }
136
smbios_build_type_1_fields(const char * t)137 static void smbios_build_type_1_fields(const char *t)
138 {
139 char buf[1024];
140
141 if (get_param_value(buf, sizeof(buf), "manufacturer", t))
142 smbios_add_field(1, offsetof(struct smbios_type_1, manufacturer_str),
143 strlen(buf) + 1, buf);
144 if (get_param_value(buf, sizeof(buf), "product", t))
145 smbios_add_field(1, offsetof(struct smbios_type_1, product_name_str),
146 strlen(buf) + 1, buf);
147 if (get_param_value(buf, sizeof(buf), "version", t))
148 smbios_add_field(1, offsetof(struct smbios_type_1, version_str),
149 strlen(buf) + 1, buf);
150 if (get_param_value(buf, sizeof(buf), "serial", t))
151 smbios_add_field(1, offsetof(struct smbios_type_1, serial_number_str),
152 strlen(buf) + 1, buf);
153 if (get_param_value(buf, sizeof(buf), "uuid", t)) {
154 if (qemu_uuid_parse(buf, qemu_uuid) != 0) {
155 fprintf(stderr, "Invalid SMBIOS UUID string\n");
156 exit(1);
157 }
158 }
159 if (get_param_value(buf, sizeof(buf), "sku", t))
160 smbios_add_field(1, offsetof(struct smbios_type_1, sku_number_str),
161 strlen(buf) + 1, buf);
162 if (get_param_value(buf, sizeof(buf), "family", t))
163 smbios_add_field(1, offsetof(struct smbios_type_1, family_str),
164 strlen(buf) + 1, buf);
165 }
166
smbios_entry_add(const char * t)167 int smbios_entry_add(const char *t)
168 {
169 char buf[1024];
170
171 if (get_param_value(buf, sizeof(buf), "file", t)) {
172 struct smbios_structure_header *header;
173 struct smbios_table *table;
174 int size = get_image_size(buf);
175
176 if (size < sizeof(struct smbios_structure_header)) {
177 fprintf(stderr, "Cannot read smbios file %s", buf);
178 exit(1);
179 }
180
181 if (!smbios_entries) {
182 smbios_entries_len = sizeof(uint16_t);
183 smbios_entries = qemu_mallocz(smbios_entries_len);
184 }
185
186 smbios_entries = qemu_realloc(smbios_entries, smbios_entries_len +
187 sizeof(*table) + size);
188 table = (struct smbios_table *)(smbios_entries + smbios_entries_len);
189 table->header.type = SMBIOS_TABLE_ENTRY;
190 table->header.length = cpu_to_le16(sizeof(*table) + size);
191
192 if (load_image(buf, table->data) != size) {
193 fprintf(stderr, "Failed to load smbios file %s", buf);
194 exit(1);
195 }
196
197 header = (struct smbios_structure_header *)(table->data);
198 smbios_check_collision(header->type, SMBIOS_TABLE_ENTRY);
199
200 smbios_entries_len += sizeof(*table) + size;
201 (*(uint16_t *)smbios_entries) =
202 cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
203 return 0;
204 }
205
206 if (get_param_value(buf, sizeof(buf), "type", t)) {
207 unsigned long type = strtoul(buf, NULL, 0);
208 switch (type) {
209 case 0:
210 smbios_build_type_0_fields(t);
211 return 0;
212 case 1:
213 smbios_build_type_1_fields(t);
214 return 0;
215 default:
216 fprintf(stderr, "Don't know how to build fields for SMBIOS type "
217 "%ld\n", type);
218 exit(1);
219 }
220 }
221
222 fprintf(stderr, "smbios: must specify type= or file=\n");
223 return -1;
224 }
225