Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * acpi_tables.c - ACPI Boot-Time Table Parsing | |
3 | * | |
4 | * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
1da177e4 LT |
18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
19 | * | |
20 | */ | |
21 | ||
07f438df HG |
22 | /* Uncomment next line to get verbose printout */ |
23 | /* #define DEBUG */ | |
730bf5eb HG |
24 | #define pr_fmt(fmt) "ACPI: " fmt |
25 | ||
1da177e4 LT |
26 | #include <linux/init.h> |
27 | #include <linux/kernel.h> | |
1da177e4 LT |
28 | #include <linux/smp.h> |
29 | #include <linux/string.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/irq.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/acpi.h> | |
5ae74f2c | 34 | #include <linux/memblock.h> |
57c8a661 | 35 | #include <linux/earlycpio.h> |
da3d3f98 | 36 | #include <linux/initrd.h> |
c85cc817 | 37 | #include "internal.h" |
1da177e4 | 38 | |
74216699 RW |
39 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
40 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
41 | #endif | |
42 | ||
04348e69 | 43 | #define ACPI_MAX_TABLES 128 |
1da177e4 | 44 | |
1da177e4 LT |
45 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
46 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; | |
47 | ||
ad71860a | 48 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
1da177e4 | 49 | |
4e381a4f | 50 | static int acpi_apic_instance __initdata; |
a1fdcc0d | 51 | |
60574d1e KB |
52 | enum acpi_subtable_type { |
53 | ACPI_SUBTABLE_COMMON, | |
54 | }; | |
55 | ||
56 | struct acpi_subtable_entry { | |
57 | union acpi_subtable_headers *hdr; | |
58 | enum acpi_subtable_type type; | |
59 | }; | |
60 | ||
4fc0a7e8 LZ |
61 | /* |
62 | * Disable table checksum verification for the early stage due to the size | |
63 | * limitation of the current x86 early mapping implementation. | |
64 | */ | |
65 | static bool acpi_verify_table_checksum __initdata = false; | |
66 | ||
a1fdcc0d | 67 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
1da177e4 LT |
68 | { |
69 | if (!header) | |
70 | return; | |
71 | ||
72 | switch (header->type) { | |
73 | ||
5f3b1a8b | 74 | case ACPI_MADT_TYPE_LOCAL_APIC: |
4be44fcd | 75 | { |
5f3b1a8b AS |
76 | struct acpi_madt_local_apic *p = |
77 | (struct acpi_madt_local_apic *)header; | |
07f438df HG |
78 | pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
79 | p->processor_id, p->id, | |
80 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 81 | } |
1da177e4 LT |
82 | break; |
83 | ||
7237d3de SS |
84 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
85 | { | |
86 | struct acpi_madt_local_x2apic *p = | |
87 | (struct acpi_madt_local_x2apic *)header; | |
07f438df HG |
88 | pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
89 | p->local_apic_id, p->uid, | |
90 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
7237d3de SS |
91 | } |
92 | break; | |
93 | ||
5f3b1a8b | 94 | case ACPI_MADT_TYPE_IO_APIC: |
4be44fcd | 95 | { |
5f3b1a8b AS |
96 | struct acpi_madt_io_apic *p = |
97 | (struct acpi_madt_io_apic *)header; | |
07f438df HG |
98 | pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
99 | p->id, p->address, p->global_irq_base); | |
4be44fcd | 100 | } |
1da177e4 LT |
101 | break; |
102 | ||
5f3b1a8b | 103 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
4be44fcd | 104 | { |
5f3b1a8b AS |
105 | struct acpi_madt_interrupt_override *p = |
106 | (struct acpi_madt_interrupt_override *)header; | |
730bf5eb HG |
107 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
108 | p->bus, p->source_irq, p->global_irq, | |
109 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
110 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); | |
5f3b1a8b AS |
111 | if (p->inti_flags & |
112 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) | |
730bf5eb HG |
113 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
114 | p->inti_flags & | |
5f3b1a8b | 115 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
4be44fcd | 116 | } |
1da177e4 LT |
117 | break; |
118 | ||
5f3b1a8b | 119 | case ACPI_MADT_TYPE_NMI_SOURCE: |
4be44fcd | 120 | { |
5f3b1a8b AS |
121 | struct acpi_madt_nmi_source *p = |
122 | (struct acpi_madt_nmi_source *)header; | |
730bf5eb HG |
123 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
124 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
125 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
126 | p->global_irq); | |
4be44fcd | 127 | } |
1da177e4 LT |
128 | break; |
129 | ||
5f3b1a8b | 130 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
4be44fcd | 131 | { |
5f3b1a8b AS |
132 | struct acpi_madt_local_apic_nmi *p = |
133 | (struct acpi_madt_local_apic_nmi *)header; | |
730bf5eb HG |
134 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
135 | p->processor_id, | |
136 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], | |
137 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
138 | p->lint); | |
7237d3de SS |
139 | } |
140 | break; | |
141 | ||
142 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: | |
143 | { | |
144 | u16 polarity, trigger; | |
145 | struct acpi_madt_local_x2apic_nmi *p = | |
146 | (struct acpi_madt_local_x2apic_nmi *)header; | |
147 | ||
148 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; | |
149 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
150 | ||
730bf5eb HG |
151 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
152 | p->uid, | |
153 | mps_inti_flags_polarity[polarity], | |
154 | mps_inti_flags_trigger[trigger], | |
155 | p->lint); | |
4be44fcd | 156 | } |
1da177e4 LT |
157 | break; |
158 | ||
5f3b1a8b | 159 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
4be44fcd | 160 | { |
5f3b1a8b AS |
161 | struct acpi_madt_local_apic_override *p = |
162 | (struct acpi_madt_local_apic_override *)header; | |
730bf5eb HG |
163 | pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
164 | (void *)(unsigned long)p->address); | |
4be44fcd | 165 | } |
1da177e4 LT |
166 | break; |
167 | ||
5f3b1a8b | 168 | case ACPI_MADT_TYPE_IO_SAPIC: |
4be44fcd | 169 | { |
5f3b1a8b AS |
170 | struct acpi_madt_io_sapic *p = |
171 | (struct acpi_madt_io_sapic *)header; | |
07f438df HG |
172 | pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
173 | p->id, (void *)(unsigned long)p->address, | |
174 | p->global_irq_base); | |
4be44fcd | 175 | } |
1da177e4 LT |
176 | break; |
177 | ||
5f3b1a8b | 178 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
4be44fcd | 179 | { |
5f3b1a8b AS |
180 | struct acpi_madt_local_sapic *p = |
181 | (struct acpi_madt_local_sapic *)header; | |
07f438df HG |
182 | pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
183 | p->processor_id, p->id, p->eid, | |
184 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 185 | } |
1da177e4 LT |
186 | break; |
187 | ||
5f3b1a8b | 188 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
4be44fcd | 189 | { |
5f3b1a8b AS |
190 | struct acpi_madt_interrupt_source *p = |
191 | (struct acpi_madt_interrupt_source *)header; | |
730bf5eb HG |
192 | pr_info("PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n", |
193 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
194 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
195 | p->type, p->id, p->eid, p->io_sapic_vector, | |
196 | p->global_irq); | |
4be44fcd | 197 | } |
1da177e4 LT |
198 | break; |
199 | ||
4c1c8d7a HG |
200 | case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
201 | { | |
202 | struct acpi_madt_generic_interrupt *p = | |
203 | (struct acpi_madt_generic_interrupt *)header; | |
204 | pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", | |
205 | p->uid, p->base_address, | |
206 | p->arm_mpidr, | |
207 | (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
208 | ||
209 | } | |
210 | break; | |
211 | ||
212 | case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: | |
213 | { | |
214 | struct acpi_madt_generic_distributor *p = | |
215 | (struct acpi_madt_generic_distributor *)header; | |
216 | pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", | |
217 | p->gic_id, p->base_address, | |
218 | p->global_irq_base); | |
219 | } | |
220 | break; | |
221 | ||
1da177e4 | 222 | default: |
730bf5eb HG |
223 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
224 | header->type); | |
1da177e4 LT |
225 | break; |
226 | } | |
227 | } | |
228 | ||
60574d1e KB |
229 | static unsigned long __init |
230 | acpi_get_entry_type(struct acpi_subtable_entry *entry) | |
231 | { | |
232 | switch (entry->type) { | |
233 | case ACPI_SUBTABLE_COMMON: | |
234 | return entry->hdr->common.type; | |
235 | } | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static unsigned long __init | |
240 | acpi_get_entry_length(struct acpi_subtable_entry *entry) | |
241 | { | |
242 | switch (entry->type) { | |
243 | case ACPI_SUBTABLE_COMMON: | |
244 | return entry->hdr->common.length; | |
245 | } | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static unsigned long __init | |
250 | acpi_get_subtable_header_length(struct acpi_subtable_entry *entry) | |
251 | { | |
252 | switch (entry->type) { | |
253 | case ACPI_SUBTABLE_COMMON: | |
254 | return sizeof(entry->hdr->common); | |
255 | } | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static enum acpi_subtable_type __init | |
260 | acpi_get_subtable_type(char *id) | |
261 | { | |
262 | return ACPI_SUBTABLE_COMMON; | |
263 | } | |
264 | ||
9b3fedde LA |
265 | /** |
266 | * acpi_parse_entries_array - for each proc_num find a suitable subtable | |
267 | * | |
268 | * @id: table id (for debugging purposes) | |
904aaf80 | 269 | * @table_size: size of the root table |
9b3fedde LA |
270 | * @table_header: where does the table start? |
271 | * @proc: array of acpi_subtable_proc struct containing entry id | |
272 | * and associated handler with it | |
273 | * @proc_num: how big proc is? | |
274 | * @max_entries: how many entries can we process? | |
275 | * | |
276 | * For each proc_num find a subtable with proc->id and run proc->handler | |
277 | * on it. Assumption is that there's only single handler for particular | |
278 | * entry id. | |
279 | * | |
904aaf80 AS |
280 | * The table_size is not the size of the complete ACPI table (the length |
281 | * field in the header struct), but only the size of the root table; i.e., | |
282 | * the offset from the very first byte of the complete ACPI table, to the | |
283 | * first byte of the very first subtable. | |
284 | * | |
9b3fedde LA |
285 | * On success returns sum of all matching entries for all proc handlers. |
286 | * Otherwise, -ENODEV or -EINVAL is returned. | |
287 | */ | |
288 | static int __init | |
289 | acpi_parse_entries_array(char *id, unsigned long table_size, | |
f08bb472 | 290 | struct acpi_table_header *table_header, |
9b3fedde LA |
291 | struct acpi_subtable_proc *proc, int proc_num, |
292 | unsigned int max_entries) | |
1da177e4 | 293 | { |
60574d1e KB |
294 | struct acpi_subtable_entry entry; |
295 | unsigned long table_end, subtable_len, entry_len; | |
9b3fedde | 296 | int count = 0; |
8726d4f4 | 297 | int errs = 0; |
9b3fedde | 298 | int i; |
1da177e4 | 299 | |
68ca4069 | 300 | if (acpi_disabled) |
e5b8fc6a LB |
301 | return -ENODEV; |
302 | ||
9b3fedde | 303 | if (!id) |
1da177e4 LT |
304 | return -EINVAL; |
305 | ||
f08bb472 AC |
306 | if (!table_size) |
307 | return -EINVAL; | |
1da177e4 | 308 | |
6eb87fed | 309 | if (!table_header) { |
730bf5eb | 310 | pr_warn("%4.4s not present\n", id); |
1da177e4 LT |
311 | return -ENODEV; |
312 | } | |
313 | ||
6eb87fed | 314 | table_end = (unsigned long)table_header + table_header->length; |
1da177e4 LT |
315 | |
316 | /* Parse all entries looking for a match. */ | |
317 | ||
60574d1e KB |
318 | entry.type = acpi_get_subtable_type(id); |
319 | entry.hdr = (union acpi_subtable_headers *) | |
6eb87fed | 320 | ((unsigned long)table_header + table_size); |
60574d1e | 321 | subtable_len = acpi_get_subtable_header_length(&entry); |
1da177e4 | 322 | |
60574d1e | 323 | while (((unsigned long)entry.hdr) + subtable_len < table_end) { |
9b3fedde LA |
324 | if (max_entries && count >= max_entries) |
325 | break; | |
326 | ||
327 | for (i = 0; i < proc_num; i++) { | |
60574d1e | 328 | if (acpi_get_entry_type(&entry) != proc[i].id) |
9b3fedde | 329 | continue; |
362414d9 | 330 | if (!proc[i].handler || |
60574d1e | 331 | (!errs && proc[i].handler(entry.hdr, table_end))) { |
8726d4f4 AS |
332 | errs++; |
333 | continue; | |
334 | } | |
369d913b | 335 | |
fa162a05 | 336 | proc[i].count++; |
9b3fedde | 337 | break; |
4ceacd02 | 338 | } |
9b3fedde LA |
339 | if (i != proc_num) |
340 | count++; | |
4ceacd02 | 341 | |
369d913b FY |
342 | /* |
343 | * If entry->length is 0, break from this loop to avoid | |
344 | * infinite loop. | |
345 | */ | |
60574d1e KB |
346 | entry_len = acpi_get_entry_length(&entry); |
347 | if (entry_len == 0) { | |
9b3fedde | 348 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
f08bb472 | 349 | return -EINVAL; |
369d913b | 350 | } |
1da177e4 | 351 | |
60574d1e KB |
352 | entry.hdr = (union acpi_subtable_headers *) |
353 | ((unsigned long)entry.hdr + entry_len); | |
1da177e4 | 354 | } |
f08bb472 | 355 | |
1da177e4 | 356 | if (max_entries && count > max_entries) { |
99b0efd7 AS |
357 | pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n", |
358 | id, proc->id, count); | |
1da177e4 LT |
359 | } |
360 | ||
8726d4f4 | 361 | return errs ? -EINVAL : count; |
f08bb472 AC |
362 | } |
363 | ||
9b3fedde LA |
364 | int __init |
365 | acpi_table_parse_entries_array(char *id, | |
f08bb472 | 366 | unsigned long table_size, |
9b3fedde | 367 | struct acpi_subtable_proc *proc, int proc_num, |
f08bb472 AC |
368 | unsigned int max_entries) |
369 | { | |
370 | struct acpi_table_header *table_header = NULL; | |
f08bb472 AC |
371 | int count; |
372 | u32 instance = 0; | |
373 | ||
374 | if (acpi_disabled) | |
375 | return -ENODEV; | |
376 | ||
9b3fedde | 377 | if (!id) |
f08bb472 AC |
378 | return -EINVAL; |
379 | ||
380 | if (!strncmp(id, ACPI_SIG_MADT, 4)) | |
381 | instance = acpi_apic_instance; | |
382 | ||
6b11d1d6 | 383 | acpi_get_table(id, instance, &table_header); |
f08bb472 AC |
384 | if (!table_header) { |
385 | pr_warn("%4.4s not present\n", id); | |
386 | return -ENODEV; | |
387 | } | |
388 | ||
9b3fedde LA |
389 | count = acpi_parse_entries_array(id, table_size, table_header, |
390 | proc, proc_num, max_entries); | |
f08bb472 | 391 | |
6b11d1d6 | 392 | acpi_put_table(table_header); |
f08bb472 | 393 | return count; |
1da177e4 LT |
394 | } |
395 | ||
9b3fedde LA |
396 | int __init |
397 | acpi_table_parse_entries(char *id, | |
398 | unsigned long table_size, | |
399 | int entry_id, | |
400 | acpi_tbl_entry_handler handler, | |
401 | unsigned int max_entries) | |
402 | { | |
403 | struct acpi_subtable_proc proc = { | |
404 | .id = entry_id, | |
405 | .handler = handler, | |
406 | }; | |
407 | ||
408 | return acpi_table_parse_entries_array(id, table_size, &proc, 1, | |
409 | max_entries); | |
410 | } | |
411 | ||
1da177e4 | 412 | int __init |
5f3b1a8b | 413 | acpi_table_parse_madt(enum acpi_madt_type id, |
b43e1065 | 414 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
1da177e4 | 415 | { |
6eb87fed | 416 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
4be44fcd LB |
417 | sizeof(struct acpi_table_madt), id, |
418 | handler, max_entries); | |
1da177e4 LT |
419 | } |
420 | ||
7f8f97c3 LB |
421 | /** |
422 | * acpi_table_parse - find table with @id, run @handler on it | |
7f8f97c3 LB |
423 | * @id: table id to find |
424 | * @handler: handler to run | |
425 | * | |
426 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, | |
f8a571b2 | 427 | * run @handler on it. |
428 | * | |
429 | * Return 0 if table found, -errno if not. | |
7f8f97c3 | 430 | */ |
b43e1065 | 431 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
1da177e4 | 432 | { |
ceb6c468 | 433 | struct acpi_table_header *table = NULL; |
a1fdcc0d | 434 | |
68ca4069 | 435 | if (acpi_disabled) |
e5b8fc6a LB |
436 | return -ENODEV; |
437 | ||
de2d1a7e | 438 | if (!id || !handler) |
1da177e4 LT |
439 | return -EINVAL; |
440 | ||
a1fdcc0d | 441 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
6b11d1d6 | 442 | acpi_get_table(id, acpi_apic_instance, &table); |
a1fdcc0d | 443 | else |
6b11d1d6 | 444 | acpi_get_table(id, 0, &table); |
a1fdcc0d | 445 | |
ceb6c468 AS |
446 | if (table) { |
447 | handler(table); | |
6b11d1d6 | 448 | acpi_put_table(table); |
ceb6c468 | 449 | return 0; |
7f8f97c3 | 450 | } else |
95df812d | 451 | return -ENODEV; |
1da177e4 LT |
452 | } |
453 | ||
904aaf80 | 454 | /* |
a1fdcc0d LB |
455 | * The BIOS is supposed to supply a single APIC/MADT, |
456 | * but some report two. Provide a knob to use either. | |
457 | * (don't you wish instance 0 and 1 were not the same?) | |
458 | */ | |
459 | static void __init check_multiple_madt(void) | |
460 | { | |
461 | struct acpi_table_header *table = NULL; | |
462 | ||
6b11d1d6 | 463 | acpi_get_table(ACPI_SIG_MADT, 2, &table); |
a1fdcc0d | 464 | if (table) { |
730bf5eb HG |
465 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
466 | acpi_apic_instance); | |
467 | pr_warn("If \"acpi_apic_instance=%d\" works better, " | |
468 | "notify linux-acpi@vger.kernel.org\n", | |
469 | acpi_apic_instance ? 0 : 2); | |
6b11d1d6 | 470 | acpi_put_table(table); |
a1fdcc0d LB |
471 | |
472 | } else | |
473 | acpi_apic_instance = 0; | |
474 | ||
475 | return; | |
476 | } | |
477 | ||
5ae74f2c LZ |
478 | static void acpi_table_taint(struct acpi_table_header *table) |
479 | { | |
480 | pr_warn("Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
481 | table->signature, table->oem_table_id); | |
482 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); | |
483 | } | |
484 | ||
5d881327 | 485 | #ifdef CONFIG_ACPI_TABLE_UPGRADE |
5ae74f2c LZ |
486 | static u64 acpi_tables_addr; |
487 | static int all_tables_size; | |
488 | ||
489 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
490 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) | |
491 | { | |
492 | u8 sum = 0; | |
493 | u8 *end = buffer + length; | |
494 | ||
495 | while (buffer < end) | |
496 | sum = (u8) (sum + *(buffer++)); | |
497 | return sum; | |
498 | } | |
499 | ||
500 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
501 | static const char * const table_sigs[] = { | |
502 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
503 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
504 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
505 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
506 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
507 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
508 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
509 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
89067434 | 510 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, ACPI_SIG_IORT, |
bce1a651 | 511 | ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT, NULL }; |
5ae74f2c LZ |
512 | |
513 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) | |
514 | ||
5d881327 LZ |
515 | #define NR_ACPI_INITRD_TABLES 64 |
516 | static struct cpio_data __initdata acpi_initrd_files[NR_ACPI_INITRD_TABLES]; | |
517 | static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES); | |
5ae74f2c LZ |
518 | |
519 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
520 | ||
da3d3f98 | 521 | void __init acpi_table_upgrade(void) |
5ae74f2c | 522 | { |
98a455d9 SY |
523 | void *data; |
524 | size_t size; | |
5ae74f2c LZ |
525 | int sig, no, table_nr = 0, total_offset = 0; |
526 | long offset = 0; | |
527 | struct acpi_table_header *table; | |
528 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
529 | struct cpio_data file; | |
530 | ||
98a455d9 SY |
531 | if (IS_ENABLED(CONFIG_ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD)) { |
532 | data = __initramfs_start; | |
533 | size = __initramfs_size; | |
534 | } else { | |
535 | data = (void *)initrd_start; | |
536 | size = initrd_end - initrd_start; | |
537 | } | |
538 | ||
5ae74f2c LZ |
539 | if (data == NULL || size == 0) |
540 | return; | |
541 | ||
5d881327 | 542 | for (no = 0; no < NR_ACPI_INITRD_TABLES; no++) { |
5ae74f2c LZ |
543 | file = find_cpio_data(cpio_path, data, size, &offset); |
544 | if (!file.data) | |
545 | break; | |
546 | ||
547 | data += offset; | |
548 | size -= offset; | |
549 | ||
550 | if (file.size < sizeof(struct acpi_table_header)) { | |
551 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
552 | cpio_path, file.name); | |
553 | continue; | |
554 | } | |
555 | ||
556 | table = file.data; | |
557 | ||
558 | for (sig = 0; table_sigs[sig]; sig++) | |
559 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
560 | break; | |
561 | ||
562 | if (!table_sigs[sig]) { | |
563 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
564 | cpio_path, file.name); | |
565 | continue; | |
566 | } | |
567 | if (file.size != table->length) { | |
568 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
569 | cpio_path, file.name); | |
570 | continue; | |
571 | } | |
572 | if (acpi_table_checksum(file.data, table->length)) { | |
573 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
574 | cpio_path, file.name); | |
575 | continue; | |
576 | } | |
577 | ||
578 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
579 | table->signature, cpio_path, file.name, table->length); | |
580 | ||
581 | all_tables_size += table->length; | |
582 | acpi_initrd_files[table_nr].data = file.data; | |
583 | acpi_initrd_files[table_nr].size = file.size; | |
584 | table_nr++; | |
585 | } | |
586 | if (table_nr == 0) | |
587 | return; | |
588 | ||
589 | acpi_tables_addr = | |
84b06ca3 | 590 | memblock_find_in_range(0, ACPI_TABLE_UPGRADE_MAX_PHYS, |
5ae74f2c LZ |
591 | all_tables_size, PAGE_SIZE); |
592 | if (!acpi_tables_addr) { | |
593 | WARN_ON(1); | |
594 | return; | |
595 | } | |
596 | /* | |
597 | * Only calling e820_add_reserve does not work and the | |
598 | * tables are invalid (memory got used) later. | |
599 | * memblock_reserve works as expected and the tables won't get modified. | |
600 | * But it's not enough on X86 because ioremap will | |
601 | * complain later (used by acpi_os_map_memory) that the pages | |
602 | * that should get mapped are not marked "reserved". | |
ab6bc04c | 603 | * Both memblock_reserve and e820__range_add (via arch_reserve_mem_area) |
5ae74f2c LZ |
604 | * works fine. |
605 | */ | |
606 | memblock_reserve(acpi_tables_addr, all_tables_size); | |
607 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); | |
608 | ||
609 | /* | |
610 | * early_ioremap only can remap 256k one time. If we map all | |
611 | * tables one time, we will hit the limit. Need to map chunks | |
612 | * one by one during copying the same as that in relocate_initrd(). | |
613 | */ | |
614 | for (no = 0; no < table_nr; no++) { | |
615 | unsigned char *src_p = acpi_initrd_files[no].data; | |
616 | phys_addr_t size = acpi_initrd_files[no].size; | |
617 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
618 | phys_addr_t slop, clen; | |
619 | char *dest_p; | |
620 | ||
621 | total_offset += size; | |
622 | ||
623 | while (size) { | |
624 | slop = dest_addr & ~PAGE_MASK; | |
625 | clen = size; | |
626 | if (clen > MAP_CHUNK_SIZE - slop) | |
627 | clen = MAP_CHUNK_SIZE - slop; | |
ce0c1fcc AM |
628 | dest_p = early_memremap(dest_addr & PAGE_MASK, |
629 | clen + slop); | |
5ae74f2c | 630 | memcpy(dest_p + slop, src_p, clen); |
ce0c1fcc | 631 | early_memunmap(dest_p, clen + slop); |
5ae74f2c LZ |
632 | src_p += clen; |
633 | dest_addr += clen; | |
634 | size -= clen; | |
635 | } | |
636 | } | |
637 | } | |
638 | ||
639 | static acpi_status | |
640 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
641 | acpi_physical_address *address, u32 *length) | |
642 | { | |
643 | int table_offset = 0; | |
644 | int table_index = 0; | |
645 | struct acpi_table_header *table; | |
646 | u32 table_length; | |
647 | ||
648 | *length = 0; | |
649 | *address = 0; | |
650 | if (!acpi_tables_addr) | |
651 | return AE_OK; | |
652 | ||
653 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
654 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
655 | ACPI_HEADER_SIZE); | |
656 | if (table_offset + table->length > all_tables_size) { | |
657 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
658 | WARN_ON(1); | |
659 | return AE_OK; | |
660 | } | |
661 | ||
662 | table_length = table->length; | |
663 | ||
664 | /* Only override tables matched */ | |
5d881327 LZ |
665 | if (memcmp(existing_table->signature, table->signature, 4) || |
666 | memcmp(table->oem_id, existing_table->oem_id, | |
667 | ACPI_OEM_ID_SIZE) || | |
5ae74f2c LZ |
668 | memcmp(table->oem_table_id, existing_table->oem_table_id, |
669 | ACPI_OEM_TABLE_ID_SIZE)) { | |
670 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
671 | goto next_table; | |
672 | } | |
5d881327 LZ |
673 | /* |
674 | * Mark the table to avoid being used in | |
675 | * acpi_table_initrd_scan() and check the revision. | |
676 | */ | |
677 | if (test_and_set_bit(table_index, acpi_initrd_installed) || | |
678 | existing_table->oem_revision >= table->oem_revision) { | |
679 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
680 | goto next_table; | |
681 | } | |
5ae74f2c LZ |
682 | |
683 | *length = table_length; | |
684 | *address = acpi_tables_addr + table_offset; | |
5d881327 LZ |
685 | pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n", |
686 | table->signature, table->oem_id, | |
687 | table->oem_table_id); | |
5ae74f2c | 688 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
5ae74f2c LZ |
689 | break; |
690 | ||
691 | next_table: | |
692 | table_offset += table_length; | |
693 | table_index++; | |
694 | } | |
695 | return AE_OK; | |
696 | } | |
697 | ||
698 | static void __init acpi_table_initrd_scan(void) | |
699 | { | |
700 | int table_offset = 0; | |
701 | int table_index = 0; | |
702 | u32 table_length; | |
703 | struct acpi_table_header *table; | |
704 | ||
705 | if (!acpi_tables_addr) | |
706 | return; | |
707 | ||
708 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
709 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
710 | ACPI_HEADER_SIZE); | |
711 | if (table_offset + table->length > all_tables_size) { | |
712 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
713 | WARN_ON(1); | |
714 | return; | |
715 | } | |
716 | ||
717 | table_length = table->length; | |
718 | ||
719 | /* Skip RSDT/XSDT which should only be used for override */ | |
5d881327 | 720 | if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) || |
5ae74f2c LZ |
721 | ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) { |
722 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
723 | goto next_table; | |
724 | } | |
5d881327 LZ |
725 | /* |
726 | * Mark the table to avoid being used in | |
727 | * acpi_table_initrd_override(). Though this is not possible | |
728 | * because override is disabled in acpi_install_table(). | |
729 | */ | |
730 | if (test_and_set_bit(table_index, acpi_initrd_installed)) { | |
731 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
732 | goto next_table; | |
733 | } | |
5ae74f2c | 734 | |
5d881327 LZ |
735 | pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n", |
736 | table->signature, table->oem_id, | |
737 | table->oem_table_id); | |
5ae74f2c LZ |
738 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
739 | acpi_install_table(acpi_tables_addr + table_offset, TRUE); | |
5ae74f2c LZ |
740 | next_table: |
741 | table_offset += table_length; | |
742 | table_index++; | |
743 | } | |
744 | } | |
745 | #else | |
5ae74f2c LZ |
746 | static acpi_status |
747 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
748 | acpi_physical_address *address, | |
749 | u32 *table_length) | |
750 | { | |
751 | *table_length = 0; | |
752 | *address = 0; | |
753 | return AE_OK; | |
754 | } | |
755 | ||
756 | static void __init acpi_table_initrd_scan(void) | |
757 | { | |
758 | } | |
5d881327 | 759 | #endif /* CONFIG_ACPI_TABLE_UPGRADE */ |
5ae74f2c LZ |
760 | |
761 | acpi_status | |
762 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
763 | acpi_physical_address *address, | |
764 | u32 *table_length) | |
765 | { | |
766 | return acpi_table_initrd_override(existing_table, address, | |
767 | table_length); | |
768 | } | |
769 | ||
1f000e1b | 770 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
82e4eb4e WD |
771 | static void *amlcode __attribute__ ((weakref("AmlCode"))); |
772 | static void *dsdt_amlcode __attribute__ ((weakref("dsdt_aml_code"))); | |
1f000e1b | 773 | #endif |
82e4eb4e | 774 | |
5ae74f2c LZ |
775 | acpi_status |
776 | acpi_os_table_override(struct acpi_table_header *existing_table, | |
777 | struct acpi_table_header **new_table) | |
778 | { | |
779 | if (!existing_table || !new_table) | |
780 | return AE_BAD_PARAMETER; | |
781 | ||
782 | *new_table = NULL; | |
783 | ||
784 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
82e4eb4e WD |
785 | if (!strncmp(existing_table->signature, "DSDT", 4)) { |
786 | *new_table = (struct acpi_table_header *)&amlcode; | |
787 | if (!(*new_table)) | |
788 | *new_table = (struct acpi_table_header *)&dsdt_amlcode; | |
789 | } | |
5ae74f2c LZ |
790 | #endif |
791 | if (*new_table != NULL) | |
792 | acpi_table_taint(existing_table); | |
793 | return AE_OK; | |
794 | } | |
795 | ||
1da177e4 LT |
796 | /* |
797 | * acpi_table_init() | |
798 | * | |
799 | * find RSDP, find and checksum SDT/XSDT. | |
800 | * checksum all tables, print SDT/XSDT | |
5f3b1a8b | 801 | * |
1da177e4 LT |
802 | * result: sdt_entry[] is initialized |
803 | */ | |
804 | ||
4be44fcd | 805 | int __init acpi_table_init(void) |
1da177e4 | 806 | { |
9e3a9d1e LB |
807 | acpi_status status; |
808 | ||
4fc0a7e8 LZ |
809 | if (acpi_verify_table_checksum) { |
810 | pr_info("Early table checksum verification enabled\n"); | |
023e2ee1 | 811 | acpi_gbl_enable_table_validation = TRUE; |
4fc0a7e8 LZ |
812 | } else { |
813 | pr_info("Early table checksum verification disabled\n"); | |
023e2ee1 | 814 | acpi_gbl_enable_table_validation = FALSE; |
4fc0a7e8 LZ |
815 | } |
816 | ||
9e3a9d1e LB |
817 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
818 | if (ACPI_FAILURE(status)) | |
95df812d | 819 | return -EINVAL; |
5ae74f2c | 820 | acpi_table_initrd_scan(); |
9e3a9d1e | 821 | |
a1fdcc0d LB |
822 | check_multiple_madt(); |
823 | return 0; | |
824 | } | |
825 | ||
826 | static int __init acpi_parse_apic_instance(char *str) | |
827 | { | |
f0df2d6b CG |
828 | if (!str) |
829 | return -EINVAL; | |
a1fdcc0d | 830 | |
3d915894 CJ |
831 | if (kstrtoint(str, 0, &acpi_apic_instance)) |
832 | return -EINVAL; | |
a1fdcc0d | 833 | |
730bf5eb | 834 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
a1fdcc0d | 835 | |
1da177e4 LT |
836 | return 0; |
837 | } | |
a1fdcc0d LB |
838 | |
839 | early_param("acpi_apic_instance", acpi_parse_apic_instance); | |
4fc0a7e8 LZ |
840 | |
841 | static int __init acpi_force_table_verification_setup(char *s) | |
842 | { | |
843 | acpi_verify_table_checksum = true; | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | early_param("acpi_force_table_verification", acpi_force_table_verification_setup); | |
b2ca5dae CIK |
849 | |
850 | static int __init acpi_force_32bit_fadt_addr(char *s) | |
851 | { | |
852 | pr_info("Forcing 32 Bit FADT addresses\n"); | |
853 | acpi_gbl_use32_bit_fadt_addresses = TRUE; | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
858 | early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr); |