Kevin O'Connor | e7cc764 | 2009-10-04 10:05:16 -0400 | [diff] [blame] | 1 | // Paravirtualization support. |
| 2 | // |
| 3 | // Copyright (C) 2009 Red Hat Inc. |
| 4 | // |
| 5 | // Authors: |
| 6 | // Gleb Natapov <gnatapov@redhat.com> |
| 7 | // |
| 8 | // This file may be distributed under the terms of the GNU LGPLv3 license. |
| 9 | |
Kevin O'Connor | 01a8520 | 2009-10-18 09:49:59 -0400 | [diff] [blame] | 10 | #include "config.h" // CONFIG_COREBOOT |
Gerd Hoffmann | c4c9fae | 2009-12-18 12:16:04 +0100 | [diff] [blame] | 11 | #include "util.h" // ntoh[ls] |
Kevin O'Connor | 01a8520 | 2009-10-18 09:49:59 -0400 | [diff] [blame] | 12 | #include "ioport.h" // outw |
| 13 | #include "paravirt.h" // qemu_cfg_port_probe |
| 14 | #include "smbios.h" // struct smbios_structure_header |
Kevin O'Connor | e7cc764 | 2009-10-04 10:05:16 -0400 | [diff] [blame] | 15 | |
| 16 | int qemu_cfg_present; |
| 17 | |
| 18 | static void |
| 19 | qemu_cfg_select(u16 f) |
| 20 | { |
| 21 | outw(f, PORT_QEMU_CFG_CTL); |
| 22 | } |
| 23 | |
| 24 | static void |
| 25 | qemu_cfg_read(u8 *buf, int len) |
| 26 | { |
Kevin O'Connor | 6039fc5 | 2010-08-25 21:43:19 -0400 | [diff] [blame] | 27 | insb(PORT_QEMU_CFG_DATA, buf, len); |
Kevin O'Connor | e7cc764 | 2009-10-04 10:05:16 -0400 | [diff] [blame] | 28 | } |
| 29 | |
| 30 | static void |
Kevin O'Connor | 4e4b410 | 2009-10-08 21:21:59 -0400 | [diff] [blame] | 31 | qemu_cfg_skip(int len) |
| 32 | { |
| 33 | while (len--) |
| 34 | inb(PORT_QEMU_CFG_DATA); |
| 35 | } |
| 36 | |
| 37 | static void |
Kevin O'Connor | e7cc764 | 2009-10-04 10:05:16 -0400 | [diff] [blame] | 38 | qemu_cfg_read_entry(void *buf, int e, int len) |
| 39 | { |
| 40 | qemu_cfg_select(e); |
| 41 | qemu_cfg_read(buf, len); |
| 42 | } |
| 43 | |
| 44 | void qemu_cfg_port_probe(void) |
| 45 | { |
| 46 | char *sig = "QEMU"; |
| 47 | int i; |
| 48 | |
| 49 | if (CONFIG_COREBOOT) |
| 50 | return; |
| 51 | |
| 52 | qemu_cfg_present = 1; |
| 53 | |
| 54 | qemu_cfg_select(QEMU_CFG_SIGNATURE); |
| 55 | |
| 56 | for (i = 0; i < 4; i++) |
| 57 | if (inb(PORT_QEMU_CFG_DATA) != sig[i]) { |
| 58 | qemu_cfg_present = 0; |
| 59 | break; |
| 60 | } |
| 61 | dprintf(4, "qemu_cfg_present=%d\n", qemu_cfg_present); |
| 62 | } |
| 63 | |
| 64 | void qemu_cfg_get_uuid(u8 *uuid) |
| 65 | { |
| 66 | if (!qemu_cfg_present) |
| 67 | return; |
| 68 | |
| 69 | qemu_cfg_read_entry(uuid, QEMU_CFG_UUID, 16); |
| 70 | } |
| 71 | |
| 72 | int qemu_cfg_show_boot_menu(void) |
| 73 | { |
| 74 | u16 v; |
| 75 | if (!qemu_cfg_present) |
| 76 | return 1; |
| 77 | |
| 78 | qemu_cfg_read_entry(&v, QEMU_CFG_BOOT_MENU, sizeof(v)); |
| 79 | |
| 80 | return v; |
| 81 | } |
| 82 | |
Kevin O'Connor | 4d2b619 | 2009-10-08 21:37:21 -0400 | [diff] [blame] | 83 | int qemu_cfg_irq0_override(void) |
| 84 | { |
| 85 | u8 v; |
| 86 | |
| 87 | if (!qemu_cfg_present) |
| 88 | return 0; |
| 89 | |
| 90 | qemu_cfg_read_entry(&v, QEMU_CFG_IRQ0_OVERRIDE, sizeof(v)); |
| 91 | |
| 92 | return v; |
| 93 | } |
| 94 | |
Kevin O'Connor | cc6dc46 | 2009-10-08 21:18:41 -0400 | [diff] [blame] | 95 | u16 qemu_cfg_acpi_additional_tables(void) |
| 96 | { |
| 97 | u16 cnt; |
| 98 | |
| 99 | if (!qemu_cfg_present) |
| 100 | return 0; |
| 101 | |
| 102 | qemu_cfg_read_entry(&cnt, QEMU_CFG_ACPI_TABLES, sizeof(cnt)); |
| 103 | |
| 104 | return cnt; |
| 105 | } |
| 106 | |
| 107 | u16 qemu_cfg_next_acpi_table_len(void) |
| 108 | { |
| 109 | u16 len; |
| 110 | |
| 111 | qemu_cfg_read((u8*)&len, sizeof(len)); |
| 112 | |
| 113 | return len; |
| 114 | } |
| 115 | |
| 116 | void* qemu_cfg_next_acpi_table_load(void *addr, u16 len) |
| 117 | { |
| 118 | qemu_cfg_read(addr, len); |
| 119 | return addr; |
| 120 | } |
| 121 | |
Kevin O'Connor | 4e4b410 | 2009-10-08 21:21:59 -0400 | [diff] [blame] | 122 | u16 qemu_cfg_smbios_entries(void) |
| 123 | { |
| 124 | u16 cnt; |
| 125 | |
| 126 | if (!qemu_cfg_present) |
| 127 | return 0; |
| 128 | |
| 129 | qemu_cfg_read_entry(&cnt, QEMU_CFG_SMBIOS_ENTRIES, sizeof(cnt)); |
| 130 | |
| 131 | return cnt; |
| 132 | } |
| 133 | |
Jes Sorensen | 0360e8e | 2010-02-16 09:46:08 +0100 | [diff] [blame] | 134 | u32 qemu_cfg_e820_entries(void) |
| 135 | { |
| 136 | u32 cnt; |
| 137 | |
| 138 | if (!qemu_cfg_present) |
| 139 | return 0; |
| 140 | |
| 141 | qemu_cfg_read_entry(&cnt, QEMU_CFG_E820_TABLE, sizeof(cnt)); |
| 142 | return cnt; |
| 143 | } |
| 144 | |
| 145 | void* qemu_cfg_e820_load_next(void *addr) |
| 146 | { |
| 147 | qemu_cfg_read(addr, sizeof(struct e820_reservation)); |
| 148 | return addr; |
| 149 | } |
| 150 | |
Kevin O'Connor | 4e4b410 | 2009-10-08 21:21:59 -0400 | [diff] [blame] | 151 | struct smbios_header { |
| 152 | u16 length; |
| 153 | u8 type; |
| 154 | } PACKED; |
| 155 | |
| 156 | struct smbios_field { |
| 157 | struct smbios_header header; |
| 158 | u8 type; |
| 159 | u16 offset; |
| 160 | u8 data[]; |
| 161 | } PACKED; |
| 162 | |
| 163 | struct smbios_table { |
| 164 | struct smbios_header header; |
| 165 | u8 data[]; |
| 166 | } PACKED; |
| 167 | |
| 168 | #define SMBIOS_FIELD_ENTRY 0 |
| 169 | #define SMBIOS_TABLE_ENTRY 1 |
| 170 | |
| 171 | size_t qemu_cfg_smbios_load_field(int type, size_t offset, void *addr) |
| 172 | { |
| 173 | int i; |
| 174 | |
| 175 | for (i = qemu_cfg_smbios_entries(); i > 0; i--) { |
| 176 | struct smbios_field field; |
| 177 | |
| 178 | qemu_cfg_read((u8 *)&field, sizeof(struct smbios_header)); |
| 179 | field.header.length -= sizeof(struct smbios_header); |
| 180 | |
| 181 | if (field.header.type != SMBIOS_FIELD_ENTRY) { |
| 182 | qemu_cfg_skip(field.header.length); |
| 183 | continue; |
| 184 | } |
| 185 | |
| 186 | qemu_cfg_read((u8 *)&field.type, |
| 187 | sizeof(field) - sizeof(struct smbios_header)); |
| 188 | field.header.length -= sizeof(field) - sizeof(struct smbios_header); |
| 189 | |
| 190 | if (field.type != type || field.offset != offset) { |
| 191 | qemu_cfg_skip(field.header.length); |
| 192 | continue; |
| 193 | } |
| 194 | |
| 195 | qemu_cfg_read(addr, field.header.length); |
| 196 | return (size_t)field.header.length; |
| 197 | } |
| 198 | return 0; |
| 199 | } |
| 200 | |
Kevin O'Connor | 4e4b410 | 2009-10-08 21:21:59 -0400 | [diff] [blame] | 201 | int qemu_cfg_smbios_load_external(int type, char **p, unsigned *nr_structs, |
| 202 | unsigned *max_struct_size, char *end) |
| 203 | { |
| 204 | static u64 used_bitmap[4] = { 0 }; |
| 205 | char *start = *p; |
| 206 | int i; |
| 207 | |
| 208 | /* Check if we've already reported these tables */ |
| 209 | if (used_bitmap[(type >> 6) & 0x3] & (1ULL << (type & 0x3f))) |
| 210 | return 1; |
| 211 | |
| 212 | /* Don't introduce spurious end markers */ |
| 213 | if (type == 127) |
| 214 | return 0; |
| 215 | |
| 216 | for (i = qemu_cfg_smbios_entries(); i > 0; i--) { |
| 217 | struct smbios_table table; |
| 218 | struct smbios_structure_header *header = (void *)*p; |
| 219 | int string; |
| 220 | |
| 221 | qemu_cfg_read((u8 *)&table, sizeof(struct smbios_header)); |
| 222 | table.header.length -= sizeof(struct smbios_header); |
| 223 | |
| 224 | if (table.header.type != SMBIOS_TABLE_ENTRY) { |
| 225 | qemu_cfg_skip(table.header.length); |
| 226 | continue; |
| 227 | } |
| 228 | |
| 229 | if (end - *p < sizeof(struct smbios_structure_header)) { |
Kevin O'Connor | cfdc13f | 2010-02-14 13:07:54 -0500 | [diff] [blame] | 230 | warn_noalloc(); |
Kevin O'Connor | 4e4b410 | 2009-10-08 21:21:59 -0400 | [diff] [blame] | 231 | break; |
| 232 | } |
| 233 | |
| 234 | qemu_cfg_read((u8 *)*p, sizeof(struct smbios_structure_header)); |
| 235 | table.header.length -= sizeof(struct smbios_structure_header); |
| 236 | |
| 237 | if (header->type != type) { |
| 238 | qemu_cfg_skip(table.header.length); |
| 239 | continue; |
| 240 | } |
| 241 | |
| 242 | *p += sizeof(struct smbios_structure_header); |
| 243 | |
| 244 | /* Entries end with a double NULL char, if there's a string at |
| 245 | * the end (length is greater than formatted length), the string |
| 246 | * terminator provides the first NULL. */ |
| 247 | string = header->length < table.header.length + |
| 248 | sizeof(struct smbios_structure_header); |
| 249 | |
| 250 | /* Read the rest and terminate the entry */ |
| 251 | if (end - *p < table.header.length) { |
Kevin O'Connor | cfdc13f | 2010-02-14 13:07:54 -0500 | [diff] [blame] | 252 | warn_noalloc(); |
Kevin O'Connor | 4e4b410 | 2009-10-08 21:21:59 -0400 | [diff] [blame] | 253 | *p -= sizeof(struct smbios_structure_header); |
| 254 | continue; |
| 255 | } |
| 256 | qemu_cfg_read((u8 *)*p, table.header.length); |
| 257 | *p += table.header.length; |
| 258 | *((u8*)*p) = 0; |
| 259 | (*p)++; |
| 260 | if (!string) { |
| 261 | *((u8*)*p) = 0; |
| 262 | (*p)++; |
| 263 | } |
| 264 | |
| 265 | (*nr_structs)++; |
| 266 | if (*p - (char *)header > *max_struct_size) |
| 267 | *max_struct_size = *p - (char *)header; |
| 268 | } |
| 269 | |
| 270 | if (start != *p) { |
| 271 | /* Mark that we've reported on this type */ |
| 272 | used_bitmap[(type >> 6) & 0x3] |= (1ULL << (type & 0x3f)); |
| 273 | return 1; |
| 274 | } |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
Kevin O'Connor | 590e554 | 2009-10-08 22:09:02 -0400 | [diff] [blame] | 279 | int qemu_cfg_get_numa_nodes(void) |
| 280 | { |
| 281 | u64 cnt; |
| 282 | |
| 283 | qemu_cfg_read_entry(&cnt, QEMU_CFG_NUMA, sizeof(cnt)); |
| 284 | |
| 285 | return (int)cnt; |
| 286 | } |
| 287 | |
| 288 | void qemu_cfg_get_numa_data(u64 *data, int n) |
| 289 | { |
| 290 | int i; |
| 291 | |
| 292 | for (i = 0; i < n; i++) |
| 293 | qemu_cfg_read((u8*)(data + i), sizeof(u64)); |
| 294 | } |
Kevin O'Connor | 8470585 | 2009-10-08 22:13:15 -0400 | [diff] [blame] | 295 | |
| 296 | u16 qemu_cfg_get_max_cpus(void) |
| 297 | { |
| 298 | u16 cnt; |
| 299 | |
| 300 | if (!qemu_cfg_present) |
| 301 | return 0; |
| 302 | |
| 303 | qemu_cfg_read_entry(&cnt, QEMU_CFG_MAX_CPUS, sizeof(cnt)); |
| 304 | |
| 305 | return cnt; |
| 306 | } |
Gerd Hoffmann | c4c9fae | 2009-12-18 12:16:04 +0100 | [diff] [blame] | 307 | |
Kevin O'Connor | 59d6ca5 | 2012-05-31 00:20:55 -0400 | [diff] [blame^] | 308 | int qemu_cfg_read_file(struct romfile_s *file, void *dst, u32 maxlen) |
Gerd Hoffmann | c4c9fae | 2009-12-18 12:16:04 +0100 | [diff] [blame] | 309 | { |
Kevin O'Connor | 59d6ca5 | 2012-05-31 00:20:55 -0400 | [diff] [blame^] | 310 | if (file->size > maxlen) |
| 311 | return -1; |
| 312 | qemu_cfg_read_entry(dst, file->id, file->size); |
| 313 | return file->size; |
| 314 | } |
| 315 | |
| 316 | struct QemuCfgFile { |
| 317 | u32 size; /* file size */ |
| 318 | u16 select; /* write this to 0x510 to read it */ |
| 319 | u16 reserved; |
| 320 | char name[56]; |
| 321 | }; |
| 322 | |
| 323 | void qemu_cfg_romfile_setup(void) |
| 324 | { |
| 325 | if (CONFIG_COREBOOT || !qemu_cfg_present) |
| 326 | return; |
Gerd Hoffmann | c4c9fae | 2009-12-18 12:16:04 +0100 | [diff] [blame] | 327 | |
Kevin O'Connor | e230426 | 2010-06-13 16:05:17 -0400 | [diff] [blame] | 328 | u32 count; |
Gerd Hoffmann | c4c9fae | 2009-12-18 12:16:04 +0100 | [diff] [blame] | 329 | qemu_cfg_read_entry(&count, QEMU_CFG_FILE_DIR, sizeof(count)); |
Kevin O'Connor | e230426 | 2010-06-13 16:05:17 -0400 | [diff] [blame] | 330 | count = ntohl(count); |
| 331 | u32 e; |
| 332 | for (e = 0; e < count; e++) { |
Kevin O'Connor | 59d6ca5 | 2012-05-31 00:20:55 -0400 | [diff] [blame^] | 333 | struct QemuCfgFile qfile; |
| 334 | qemu_cfg_read((void*)&qfile, sizeof(qfile)); |
| 335 | struct romfile_s *file = malloc_tmp(sizeof(*file)); |
| 336 | if (!file) { |
| 337 | warn_noalloc(); |
| 338 | return; |
| 339 | } |
| 340 | memset(file, 0, sizeof(*file)); |
| 341 | strtcpy(file->name, qfile.name, sizeof(file->name)); |
| 342 | file->size = ntohl(qfile.size); |
| 343 | file->id = ntohs(qfile.select); |
| 344 | file->copy = qemu_cfg_read_file; |
| 345 | romfile_add(file); |
| 346 | dprintf(3, "Found fw_cfg file: %s (size=%d)\n", file->name, file->size); |
Gerd Hoffmann | c4c9fae | 2009-12-18 12:16:04 +0100 | [diff] [blame] | 347 | } |
Kevin O'Connor | 8b56578 | 2011-07-05 20:32:44 -0400 | [diff] [blame] | 348 | } |