Commit | Line | Data |
---|---|---|
c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * acpi_tables.c - ACPI Boot-Time Table Parsing | |
4 | * | |
5 | * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
1da177e4 LT |
6 | */ |
7 | ||
07f438df HG |
8 | /* Uncomment next line to get verbose printout */ |
9 | /* #define DEBUG */ | |
730bf5eb HG |
10 | #define pr_fmt(fmt) "ACPI: " fmt |
11 | ||
1da177e4 LT |
12 | #include <linux/init.h> |
13 | #include <linux/kernel.h> | |
1da177e4 LT |
14 | #include <linux/smp.h> |
15 | #include <linux/string.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/irq.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/acpi.h> | |
5ae74f2c | 20 | #include <linux/memblock.h> |
57c8a661 | 21 | #include <linux/earlycpio.h> |
da3d3f98 | 22 | #include <linux/initrd.h> |
6ea0e815 | 23 | #include <linux/security.h> |
c85cc817 | 24 | #include "internal.h" |
1da177e4 | 25 | |
74216699 RW |
26 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
27 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
28 | #endif | |
29 | ||
04348e69 | 30 | #define ACPI_MAX_TABLES 128 |
1da177e4 | 31 | |
1da177e4 LT |
32 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
33 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; | |
34 | ||
ad71860a | 35 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
1da177e4 | 36 | |
4e381a4f | 37 | static int acpi_apic_instance __initdata; |
a1fdcc0d | 38 | |
60574d1e KB |
39 | enum acpi_subtable_type { |
40 | ACPI_SUBTABLE_COMMON, | |
3bc0e8eb | 41 | ACPI_SUBTABLE_HMAT, |
60574d1e KB |
42 | }; |
43 | ||
44 | struct acpi_subtable_entry { | |
45 | union acpi_subtable_headers *hdr; | |
46 | enum acpi_subtable_type type; | |
47 | }; | |
48 | ||
4fc0a7e8 LZ |
49 | /* |
50 | * Disable table checksum verification for the early stage due to the size | |
51 | * limitation of the current x86 early mapping implementation. | |
52 | */ | |
53 | static bool acpi_verify_table_checksum __initdata = false; | |
54 | ||
a1fdcc0d | 55 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
1da177e4 LT |
56 | { |
57 | if (!header) | |
58 | return; | |
59 | ||
60 | switch (header->type) { | |
61 | ||
5f3b1a8b | 62 | case ACPI_MADT_TYPE_LOCAL_APIC: |
4be44fcd | 63 | { |
5f3b1a8b AS |
64 | struct acpi_madt_local_apic *p = |
65 | (struct acpi_madt_local_apic *)header; | |
07f438df HG |
66 | pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
67 | p->processor_id, p->id, | |
68 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 69 | } |
1da177e4 LT |
70 | break; |
71 | ||
7237d3de SS |
72 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
73 | { | |
74 | struct acpi_madt_local_x2apic *p = | |
75 | (struct acpi_madt_local_x2apic *)header; | |
07f438df HG |
76 | pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
77 | p->local_apic_id, p->uid, | |
78 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
7237d3de SS |
79 | } |
80 | break; | |
81 | ||
5f3b1a8b | 82 | case ACPI_MADT_TYPE_IO_APIC: |
4be44fcd | 83 | { |
5f3b1a8b AS |
84 | struct acpi_madt_io_apic *p = |
85 | (struct acpi_madt_io_apic *)header; | |
07f438df HG |
86 | pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
87 | p->id, p->address, p->global_irq_base); | |
4be44fcd | 88 | } |
1da177e4 LT |
89 | break; |
90 | ||
5f3b1a8b | 91 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
4be44fcd | 92 | { |
5f3b1a8b AS |
93 | struct acpi_madt_interrupt_override *p = |
94 | (struct acpi_madt_interrupt_override *)header; | |
730bf5eb HG |
95 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
96 | p->bus, p->source_irq, p->global_irq, | |
97 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
98 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); | |
5f3b1a8b AS |
99 | if (p->inti_flags & |
100 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) | |
730bf5eb HG |
101 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
102 | p->inti_flags & | |
5f3b1a8b | 103 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
4be44fcd | 104 | } |
1da177e4 LT |
105 | break; |
106 | ||
5f3b1a8b | 107 | case ACPI_MADT_TYPE_NMI_SOURCE: |
4be44fcd | 108 | { |
5f3b1a8b AS |
109 | struct acpi_madt_nmi_source *p = |
110 | (struct acpi_madt_nmi_source *)header; | |
730bf5eb HG |
111 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
112 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
113 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
114 | p->global_irq); | |
4be44fcd | 115 | } |
1da177e4 LT |
116 | break; |
117 | ||
5f3b1a8b | 118 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
4be44fcd | 119 | { |
5f3b1a8b AS |
120 | struct acpi_madt_local_apic_nmi *p = |
121 | (struct acpi_madt_local_apic_nmi *)header; | |
730bf5eb HG |
122 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
123 | p->processor_id, | |
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->lint); | |
7237d3de SS |
127 | } |
128 | break; | |
129 | ||
130 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: | |
131 | { | |
132 | u16 polarity, trigger; | |
133 | struct acpi_madt_local_x2apic_nmi *p = | |
134 | (struct acpi_madt_local_x2apic_nmi *)header; | |
135 | ||
136 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; | |
137 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
138 | ||
730bf5eb HG |
139 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
140 | p->uid, | |
141 | mps_inti_flags_polarity[polarity], | |
142 | mps_inti_flags_trigger[trigger], | |
143 | p->lint); | |
4be44fcd | 144 | } |
1da177e4 LT |
145 | break; |
146 | ||
5f3b1a8b | 147 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
4be44fcd | 148 | { |
5f3b1a8b AS |
149 | struct acpi_madt_local_apic_override *p = |
150 | (struct acpi_madt_local_apic_override *)header; | |
730bf5eb HG |
151 | pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
152 | (void *)(unsigned long)p->address); | |
4be44fcd | 153 | } |
1da177e4 LT |
154 | break; |
155 | ||
5f3b1a8b | 156 | case ACPI_MADT_TYPE_IO_SAPIC: |
4be44fcd | 157 | { |
5f3b1a8b AS |
158 | struct acpi_madt_io_sapic *p = |
159 | (struct acpi_madt_io_sapic *)header; | |
07f438df HG |
160 | pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
161 | p->id, (void *)(unsigned long)p->address, | |
162 | p->global_irq_base); | |
4be44fcd | 163 | } |
1da177e4 LT |
164 | break; |
165 | ||
5f3b1a8b | 166 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
4be44fcd | 167 | { |
5f3b1a8b AS |
168 | struct acpi_madt_local_sapic *p = |
169 | (struct acpi_madt_local_sapic *)header; | |
07f438df HG |
170 | pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
171 | p->processor_id, p->id, p->eid, | |
172 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 173 | } |
1da177e4 LT |
174 | break; |
175 | ||
5f3b1a8b | 176 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
4be44fcd | 177 | { |
5f3b1a8b AS |
178 | struct acpi_madt_interrupt_source *p = |
179 | (struct acpi_madt_interrupt_source *)header; | |
730bf5eb HG |
180 | 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", |
181 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
182 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
183 | p->type, p->id, p->eid, p->io_sapic_vector, | |
184 | p->global_irq); | |
4be44fcd | 185 | } |
1da177e4 LT |
186 | break; |
187 | ||
4c1c8d7a HG |
188 | case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
189 | { | |
190 | struct acpi_madt_generic_interrupt *p = | |
191 | (struct acpi_madt_generic_interrupt *)header; | |
192 | pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", | |
193 | p->uid, p->base_address, | |
194 | p->arm_mpidr, | |
195 | (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
196 | ||
197 | } | |
198 | break; | |
199 | ||
200 | case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: | |
201 | { | |
202 | struct acpi_madt_generic_distributor *p = | |
203 | (struct acpi_madt_generic_distributor *)header; | |
204 | pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", | |
205 | p->gic_id, p->base_address, | |
206 | p->global_irq_base); | |
207 | } | |
208 | break; | |
209 | ||
1da177e4 | 210 | default: |
730bf5eb HG |
211 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
212 | header->type); | |
1da177e4 LT |
213 | break; |
214 | } | |
215 | } | |
216 | ||
60574d1e KB |
217 | static unsigned long __init |
218 | acpi_get_entry_type(struct acpi_subtable_entry *entry) | |
219 | { | |
220 | switch (entry->type) { | |
221 | case ACPI_SUBTABLE_COMMON: | |
222 | return entry->hdr->common.type; | |
3bc0e8eb KB |
223 | case ACPI_SUBTABLE_HMAT: |
224 | return entry->hdr->hmat.type; | |
60574d1e KB |
225 | } |
226 | return 0; | |
227 | } | |
228 | ||
229 | static unsigned long __init | |
230 | acpi_get_entry_length(struct acpi_subtable_entry *entry) | |
231 | { | |
232 | switch (entry->type) { | |
233 | case ACPI_SUBTABLE_COMMON: | |
234 | return entry->hdr->common.length; | |
3bc0e8eb KB |
235 | case ACPI_SUBTABLE_HMAT: |
236 | return entry->hdr->hmat.length; | |
60574d1e KB |
237 | } |
238 | return 0; | |
239 | } | |
240 | ||
241 | static unsigned long __init | |
242 | acpi_get_subtable_header_length(struct acpi_subtable_entry *entry) | |
243 | { | |
244 | switch (entry->type) { | |
245 | case ACPI_SUBTABLE_COMMON: | |
246 | return sizeof(entry->hdr->common); | |
3bc0e8eb KB |
247 | case ACPI_SUBTABLE_HMAT: |
248 | return sizeof(entry->hdr->hmat); | |
60574d1e KB |
249 | } |
250 | return 0; | |
251 | } | |
252 | ||
253 | static enum acpi_subtable_type __init | |
254 | acpi_get_subtable_type(char *id) | |
255 | { | |
3bc0e8eb KB |
256 | if (strncmp(id, ACPI_SIG_HMAT, 4) == 0) |
257 | return ACPI_SUBTABLE_HMAT; | |
60574d1e KB |
258 | return ACPI_SUBTABLE_COMMON; |
259 | } | |
260 | ||
9b3fedde LA |
261 | /** |
262 | * acpi_parse_entries_array - for each proc_num find a suitable subtable | |
263 | * | |
264 | * @id: table id (for debugging purposes) | |
904aaf80 | 265 | * @table_size: size of the root table |
9b3fedde LA |
266 | * @table_header: where does the table start? |
267 | * @proc: array of acpi_subtable_proc struct containing entry id | |
268 | * and associated handler with it | |
269 | * @proc_num: how big proc is? | |
270 | * @max_entries: how many entries can we process? | |
271 | * | |
272 | * For each proc_num find a subtable with proc->id and run proc->handler | |
273 | * on it. Assumption is that there's only single handler for particular | |
274 | * entry id. | |
275 | * | |
904aaf80 AS |
276 | * The table_size is not the size of the complete ACPI table (the length |
277 | * field in the header struct), but only the size of the root table; i.e., | |
278 | * the offset from the very first byte of the complete ACPI table, to the | |
279 | * first byte of the very first subtable. | |
280 | * | |
9b3fedde LA |
281 | * On success returns sum of all matching entries for all proc handlers. |
282 | * Otherwise, -ENODEV or -EINVAL is returned. | |
283 | */ | |
2e018c59 | 284 | static int __init acpi_parse_entries_array(char *id, unsigned long table_size, |
f08bb472 | 285 | struct acpi_table_header *table_header, |
9b3fedde LA |
286 | struct acpi_subtable_proc *proc, int proc_num, |
287 | unsigned int max_entries) | |
1da177e4 | 288 | { |
60574d1e KB |
289 | struct acpi_subtable_entry entry; |
290 | unsigned long table_end, subtable_len, entry_len; | |
9b3fedde | 291 | int count = 0; |
8726d4f4 | 292 | int errs = 0; |
9b3fedde | 293 | int i; |
1da177e4 | 294 | |
68ca4069 | 295 | if (acpi_disabled) |
e5b8fc6a LB |
296 | return -ENODEV; |
297 | ||
9b3fedde | 298 | if (!id) |
1da177e4 LT |
299 | return -EINVAL; |
300 | ||
f08bb472 AC |
301 | if (!table_size) |
302 | return -EINVAL; | |
1da177e4 | 303 | |
6eb87fed | 304 | if (!table_header) { |
730bf5eb | 305 | pr_warn("%4.4s not present\n", id); |
1da177e4 LT |
306 | return -ENODEV; |
307 | } | |
308 | ||
6eb87fed | 309 | table_end = (unsigned long)table_header + table_header->length; |
1da177e4 LT |
310 | |
311 | /* Parse all entries looking for a match. */ | |
312 | ||
60574d1e KB |
313 | entry.type = acpi_get_subtable_type(id); |
314 | entry.hdr = (union acpi_subtable_headers *) | |
6eb87fed | 315 | ((unsigned long)table_header + table_size); |
60574d1e | 316 | subtable_len = acpi_get_subtable_header_length(&entry); |
1da177e4 | 317 | |
60574d1e | 318 | while (((unsigned long)entry.hdr) + subtable_len < table_end) { |
9b3fedde LA |
319 | if (max_entries && count >= max_entries) |
320 | break; | |
321 | ||
322 | for (i = 0; i < proc_num; i++) { | |
60574d1e | 323 | if (acpi_get_entry_type(&entry) != proc[i].id) |
9b3fedde | 324 | continue; |
362414d9 | 325 | if (!proc[i].handler || |
60574d1e | 326 | (!errs && proc[i].handler(entry.hdr, table_end))) { |
8726d4f4 AS |
327 | errs++; |
328 | continue; | |
329 | } | |
369d913b | 330 | |
fa162a05 | 331 | proc[i].count++; |
9b3fedde | 332 | break; |
4ceacd02 | 333 | } |
9b3fedde LA |
334 | if (i != proc_num) |
335 | count++; | |
4ceacd02 | 336 | |
369d913b FY |
337 | /* |
338 | * If entry->length is 0, break from this loop to avoid | |
339 | * infinite loop. | |
340 | */ | |
60574d1e KB |
341 | entry_len = acpi_get_entry_length(&entry); |
342 | if (entry_len == 0) { | |
9b3fedde | 343 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
f08bb472 | 344 | return -EINVAL; |
369d913b | 345 | } |
1da177e4 | 346 | |
60574d1e KB |
347 | entry.hdr = (union acpi_subtable_headers *) |
348 | ((unsigned long)entry.hdr + entry_len); | |
1da177e4 | 349 | } |
f08bb472 | 350 | |
1da177e4 | 351 | if (max_entries && count > max_entries) { |
99b0efd7 AS |
352 | pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n", |
353 | id, proc->id, count); | |
1da177e4 LT |
354 | } |
355 | ||
8726d4f4 | 356 | return errs ? -EINVAL : count; |
f08bb472 AC |
357 | } |
358 | ||
2e018c59 | 359 | int __init acpi_table_parse_entries_array(char *id, |
f08bb472 | 360 | unsigned long table_size, |
9b3fedde | 361 | struct acpi_subtable_proc *proc, int proc_num, |
f08bb472 AC |
362 | unsigned int max_entries) |
363 | { | |
364 | struct acpi_table_header *table_header = NULL; | |
f08bb472 AC |
365 | int count; |
366 | u32 instance = 0; | |
367 | ||
368 | if (acpi_disabled) | |
369 | return -ENODEV; | |
370 | ||
9b3fedde | 371 | if (!id) |
f08bb472 AC |
372 | return -EINVAL; |
373 | ||
374 | if (!strncmp(id, ACPI_SIG_MADT, 4)) | |
375 | instance = acpi_apic_instance; | |
376 | ||
6b11d1d6 | 377 | acpi_get_table(id, instance, &table_header); |
f08bb472 AC |
378 | if (!table_header) { |
379 | pr_warn("%4.4s not present\n", id); | |
380 | return -ENODEV; | |
381 | } | |
382 | ||
9b3fedde LA |
383 | count = acpi_parse_entries_array(id, table_size, table_header, |
384 | proc, proc_num, max_entries); | |
f08bb472 | 385 | |
6b11d1d6 | 386 | acpi_put_table(table_header); |
f08bb472 | 387 | return count; |
1da177e4 LT |
388 | } |
389 | ||
2e018c59 | 390 | int __init acpi_table_parse_entries(char *id, |
9b3fedde LA |
391 | unsigned long table_size, |
392 | int entry_id, | |
393 | acpi_tbl_entry_handler handler, | |
394 | unsigned int max_entries) | |
395 | { | |
396 | struct acpi_subtable_proc proc = { | |
397 | .id = entry_id, | |
398 | .handler = handler, | |
399 | }; | |
400 | ||
401 | return acpi_table_parse_entries_array(id, table_size, &proc, 1, | |
402 | max_entries); | |
403 | } | |
404 | ||
2e018c59 | 405 | int __init acpi_table_parse_madt(enum acpi_madt_type id, |
b43e1065 | 406 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
1da177e4 | 407 | { |
6eb87fed | 408 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
4be44fcd LB |
409 | sizeof(struct acpi_table_madt), id, |
410 | handler, max_entries); | |
1da177e4 LT |
411 | } |
412 | ||
7f8f97c3 LB |
413 | /** |
414 | * acpi_table_parse - find table with @id, run @handler on it | |
7f8f97c3 LB |
415 | * @id: table id to find |
416 | * @handler: handler to run | |
417 | * | |
418 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, | |
f8a571b2 | 419 | * run @handler on it. |
420 | * | |
421 | * Return 0 if table found, -errno if not. | |
7f8f97c3 | 422 | */ |
b43e1065 | 423 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
1da177e4 | 424 | { |
ceb6c468 | 425 | struct acpi_table_header *table = NULL; |
a1fdcc0d | 426 | |
68ca4069 | 427 | if (acpi_disabled) |
e5b8fc6a LB |
428 | return -ENODEV; |
429 | ||
de2d1a7e | 430 | if (!id || !handler) |
1da177e4 LT |
431 | return -EINVAL; |
432 | ||
a1fdcc0d | 433 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
6b11d1d6 | 434 | acpi_get_table(id, acpi_apic_instance, &table); |
a1fdcc0d | 435 | else |
6b11d1d6 | 436 | acpi_get_table(id, 0, &table); |
a1fdcc0d | 437 | |
ceb6c468 AS |
438 | if (table) { |
439 | handler(table); | |
6b11d1d6 | 440 | acpi_put_table(table); |
ceb6c468 | 441 | return 0; |
7f8f97c3 | 442 | } else |
95df812d | 443 | return -ENODEV; |
1da177e4 LT |
444 | } |
445 | ||
904aaf80 | 446 | /* |
a1fdcc0d LB |
447 | * The BIOS is supposed to supply a single APIC/MADT, |
448 | * but some report two. Provide a knob to use either. | |
449 | * (don't you wish instance 0 and 1 were not the same?) | |
450 | */ | |
451 | static void __init check_multiple_madt(void) | |
452 | { | |
453 | struct acpi_table_header *table = NULL; | |
454 | ||
6b11d1d6 | 455 | acpi_get_table(ACPI_SIG_MADT, 2, &table); |
a1fdcc0d | 456 | if (table) { |
730bf5eb HG |
457 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
458 | acpi_apic_instance); | |
459 | pr_warn("If \"acpi_apic_instance=%d\" works better, " | |
460 | "notify linux-acpi@vger.kernel.org\n", | |
461 | acpi_apic_instance ? 0 : 2); | |
6b11d1d6 | 462 | acpi_put_table(table); |
a1fdcc0d LB |
463 | |
464 | } else | |
465 | acpi_apic_instance = 0; | |
466 | ||
467 | return; | |
468 | } | |
469 | ||
5ae74f2c LZ |
470 | static void acpi_table_taint(struct acpi_table_header *table) |
471 | { | |
472 | pr_warn("Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
473 | table->signature, table->oem_table_id); | |
474 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); | |
475 | } | |
476 | ||
5d881327 | 477 | #ifdef CONFIG_ACPI_TABLE_UPGRADE |
5ae74f2c LZ |
478 | static u64 acpi_tables_addr; |
479 | static int all_tables_size; | |
480 | ||
481 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
482 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) | |
483 | { | |
484 | u8 sum = 0; | |
485 | u8 *end = buffer + length; | |
486 | ||
487 | while (buffer < end) | |
488 | sum = (u8) (sum + *(buffer++)); | |
489 | return sum; | |
490 | } | |
491 | ||
492 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
2229a12b | 493 | static const char table_sigs[][ACPI_NAMESEG_SIZE] __initconst = { |
c78fea61 AO |
494 | ACPI_SIG_BERT, ACPI_SIG_BGRT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, |
495 | ACPI_SIG_EINJ, ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, | |
496 | ACPI_SIG_MSCT, ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, | |
497 | ACPI_SIG_ASF, ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, | |
498 | ACPI_SIG_HPET, ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, | |
499 | ACPI_SIG_MCHI, ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, | |
500 | ACPI_SIG_TCPA, ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, | |
501 | ACPI_SIG_WDDT, ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, | |
502 | ACPI_SIG_PSDT, ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, | |
503 | ACPI_SIG_IORT, ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT, | |
2229a12b | 504 | ACPI_SIG_NHLT }; |
5ae74f2c LZ |
505 | |
506 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) | |
507 | ||
5d881327 LZ |
508 | #define NR_ACPI_INITRD_TABLES 64 |
509 | static struct cpio_data __initdata acpi_initrd_files[NR_ACPI_INITRD_TABLES]; | |
510 | static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES); | |
5ae74f2c LZ |
511 | |
512 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
513 | ||
da3d3f98 | 514 | void __init acpi_table_upgrade(void) |
5ae74f2c | 515 | { |
98a455d9 SY |
516 | void *data; |
517 | size_t size; | |
5ae74f2c LZ |
518 | int sig, no, table_nr = 0, total_offset = 0; |
519 | long offset = 0; | |
520 | struct acpi_table_header *table; | |
521 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
522 | struct cpio_data file; | |
523 | ||
98a455d9 SY |
524 | if (IS_ENABLED(CONFIG_ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD)) { |
525 | data = __initramfs_start; | |
526 | size = __initramfs_size; | |
527 | } else { | |
528 | data = (void *)initrd_start; | |
529 | size = initrd_end - initrd_start; | |
530 | } | |
531 | ||
5ae74f2c LZ |
532 | if (data == NULL || size == 0) |
533 | return; | |
534 | ||
5d881327 | 535 | for (no = 0; no < NR_ACPI_INITRD_TABLES; no++) { |
5ae74f2c LZ |
536 | file = find_cpio_data(cpio_path, data, size, &offset); |
537 | if (!file.data) | |
538 | break; | |
539 | ||
540 | data += offset; | |
541 | size -= offset; | |
542 | ||
543 | if (file.size < sizeof(struct acpi_table_header)) { | |
544 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
545 | cpio_path, file.name); | |
546 | continue; | |
547 | } | |
548 | ||
549 | table = file.data; | |
550 | ||
2229a12b | 551 | for (sig = 0; sig < ARRAY_SIZE(table_sigs); sig++) |
5ae74f2c LZ |
552 | if (!memcmp(table->signature, table_sigs[sig], 4)) |
553 | break; | |
554 | ||
2229a12b | 555 | if (sig >= ARRAY_SIZE(table_sigs)) { |
5ae74f2c LZ |
556 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", |
557 | cpio_path, file.name); | |
558 | continue; | |
559 | } | |
560 | if (file.size != table->length) { | |
561 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
562 | cpio_path, file.name); | |
563 | continue; | |
564 | } | |
565 | if (acpi_table_checksum(file.data, table->length)) { | |
566 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
567 | cpio_path, file.name); | |
568 | continue; | |
569 | } | |
570 | ||
571 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
572 | table->signature, cpio_path, file.name, table->length); | |
573 | ||
574 | all_tables_size += table->length; | |
575 | acpi_initrd_files[table_nr].data = file.data; | |
576 | acpi_initrd_files[table_nr].size = file.size; | |
577 | table_nr++; | |
578 | } | |
579 | if (table_nr == 0) | |
580 | return; | |
581 | ||
6ea0e815 LC |
582 | if (security_locked_down(LOCKDOWN_ACPI_TABLES)) { |
583 | pr_notice("kernel is locked down, ignoring table override\n"); | |
584 | return; | |
585 | } | |
586 | ||
5ae74f2c | 587 | acpi_tables_addr = |
84b06ca3 | 588 | memblock_find_in_range(0, ACPI_TABLE_UPGRADE_MAX_PHYS, |
5ae74f2c LZ |
589 | all_tables_size, PAGE_SIZE); |
590 | if (!acpi_tables_addr) { | |
591 | WARN_ON(1); | |
592 | return; | |
593 | } | |
594 | /* | |
595 | * Only calling e820_add_reserve does not work and the | |
596 | * tables are invalid (memory got used) later. | |
597 | * memblock_reserve works as expected and the tables won't get modified. | |
598 | * But it's not enough on X86 because ioremap will | |
599 | * complain later (used by acpi_os_map_memory) that the pages | |
600 | * that should get mapped are not marked "reserved". | |
ab6bc04c | 601 | * Both memblock_reserve and e820__range_add (via arch_reserve_mem_area) |
5ae74f2c LZ |
602 | * works fine. |
603 | */ | |
604 | memblock_reserve(acpi_tables_addr, all_tables_size); | |
605 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); | |
606 | ||
607 | /* | |
608 | * early_ioremap only can remap 256k one time. If we map all | |
609 | * tables one time, we will hit the limit. Need to map chunks | |
610 | * one by one during copying the same as that in relocate_initrd(). | |
611 | */ | |
612 | for (no = 0; no < table_nr; no++) { | |
613 | unsigned char *src_p = acpi_initrd_files[no].data; | |
614 | phys_addr_t size = acpi_initrd_files[no].size; | |
615 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
616 | phys_addr_t slop, clen; | |
617 | char *dest_p; | |
618 | ||
619 | total_offset += size; | |
620 | ||
621 | while (size) { | |
622 | slop = dest_addr & ~PAGE_MASK; | |
623 | clen = size; | |
624 | if (clen > MAP_CHUNK_SIZE - slop) | |
625 | clen = MAP_CHUNK_SIZE - slop; | |
ce0c1fcc AM |
626 | dest_p = early_memremap(dest_addr & PAGE_MASK, |
627 | clen + slop); | |
5ae74f2c | 628 | memcpy(dest_p + slop, src_p, clen); |
ce0c1fcc | 629 | early_memunmap(dest_p, clen + slop); |
5ae74f2c LZ |
630 | src_p += clen; |
631 | dest_addr += clen; | |
632 | size -= clen; | |
633 | } | |
634 | } | |
635 | } | |
636 | ||
637 | static acpi_status | |
638 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
639 | acpi_physical_address *address, u32 *length) | |
640 | { | |
641 | int table_offset = 0; | |
642 | int table_index = 0; | |
643 | struct acpi_table_header *table; | |
644 | u32 table_length; | |
645 | ||
646 | *length = 0; | |
647 | *address = 0; | |
648 | if (!acpi_tables_addr) | |
649 | return AE_OK; | |
650 | ||
651 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
652 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
653 | ACPI_HEADER_SIZE); | |
654 | if (table_offset + table->length > all_tables_size) { | |
655 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
656 | WARN_ON(1); | |
657 | return AE_OK; | |
658 | } | |
659 | ||
660 | table_length = table->length; | |
661 | ||
662 | /* Only override tables matched */ | |
5d881327 LZ |
663 | if (memcmp(existing_table->signature, table->signature, 4) || |
664 | memcmp(table->oem_id, existing_table->oem_id, | |
665 | ACPI_OEM_ID_SIZE) || | |
5ae74f2c LZ |
666 | memcmp(table->oem_table_id, existing_table->oem_table_id, |
667 | ACPI_OEM_TABLE_ID_SIZE)) { | |
668 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
669 | goto next_table; | |
670 | } | |
5d881327 LZ |
671 | /* |
672 | * Mark the table to avoid being used in | |
673 | * acpi_table_initrd_scan() and check the revision. | |
674 | */ | |
675 | if (test_and_set_bit(table_index, acpi_initrd_installed) || | |
676 | existing_table->oem_revision >= table->oem_revision) { | |
677 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
678 | goto next_table; | |
679 | } | |
5ae74f2c LZ |
680 | |
681 | *length = table_length; | |
682 | *address = acpi_tables_addr + table_offset; | |
5d881327 LZ |
683 | pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n", |
684 | table->signature, table->oem_id, | |
685 | table->oem_table_id); | |
5ae74f2c | 686 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
5ae74f2c LZ |
687 | break; |
688 | ||
689 | next_table: | |
690 | table_offset += table_length; | |
691 | table_index++; | |
692 | } | |
693 | return AE_OK; | |
694 | } | |
695 | ||
696 | static void __init acpi_table_initrd_scan(void) | |
697 | { | |
698 | int table_offset = 0; | |
699 | int table_index = 0; | |
700 | u32 table_length; | |
701 | struct acpi_table_header *table; | |
702 | ||
703 | if (!acpi_tables_addr) | |
704 | return; | |
705 | ||
706 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
707 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
708 | ACPI_HEADER_SIZE); | |
709 | if (table_offset + table->length > all_tables_size) { | |
710 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
711 | WARN_ON(1); | |
712 | return; | |
713 | } | |
714 | ||
715 | table_length = table->length; | |
716 | ||
717 | /* Skip RSDT/XSDT which should only be used for override */ | |
5599fb69 BM |
718 | if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_RSDT) || |
719 | ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_XSDT)) { | |
5ae74f2c LZ |
720 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
721 | goto next_table; | |
722 | } | |
5d881327 LZ |
723 | /* |
724 | * Mark the table to avoid being used in | |
725 | * acpi_table_initrd_override(). Though this is not possible | |
726 | * because override is disabled in acpi_install_table(). | |
727 | */ | |
728 | if (test_and_set_bit(table_index, acpi_initrd_installed)) { | |
729 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
730 | goto next_table; | |
731 | } | |
5ae74f2c | 732 | |
5d881327 LZ |
733 | pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n", |
734 | table->signature, table->oem_id, | |
735 | table->oem_table_id); | |
5ae74f2c LZ |
736 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
737 | acpi_install_table(acpi_tables_addr + table_offset, TRUE); | |
5ae74f2c LZ |
738 | next_table: |
739 | table_offset += table_length; | |
740 | table_index++; | |
741 | } | |
742 | } | |
743 | #else | |
5ae74f2c LZ |
744 | static acpi_status |
745 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
746 | acpi_physical_address *address, | |
747 | u32 *table_length) | |
748 | { | |
749 | *table_length = 0; | |
750 | *address = 0; | |
751 | return AE_OK; | |
752 | } | |
753 | ||
754 | static void __init acpi_table_initrd_scan(void) | |
755 | { | |
756 | } | |
5d881327 | 757 | #endif /* CONFIG_ACPI_TABLE_UPGRADE */ |
5ae74f2c LZ |
758 | |
759 | acpi_status | |
760 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
761 | acpi_physical_address *address, | |
762 | u32 *table_length) | |
763 | { | |
764 | return acpi_table_initrd_override(existing_table, address, | |
765 | table_length); | |
766 | } | |
767 | ||
1f000e1b | 768 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
82e4eb4e WD |
769 | static void *amlcode __attribute__ ((weakref("AmlCode"))); |
770 | static void *dsdt_amlcode __attribute__ ((weakref("dsdt_aml_code"))); | |
1f000e1b | 771 | #endif |
82e4eb4e | 772 | |
2e018c59 | 773 | acpi_status acpi_os_table_override(struct acpi_table_header *existing_table, |
5ae74f2c LZ |
774 | struct acpi_table_header **new_table) |
775 | { | |
776 | if (!existing_table || !new_table) | |
777 | return AE_BAD_PARAMETER; | |
778 | ||
779 | *new_table = NULL; | |
780 | ||
781 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
82e4eb4e WD |
782 | if (!strncmp(existing_table->signature, "DSDT", 4)) { |
783 | *new_table = (struct acpi_table_header *)&amlcode; | |
784 | if (!(*new_table)) | |
785 | *new_table = (struct acpi_table_header *)&dsdt_amlcode; | |
786 | } | |
5ae74f2c LZ |
787 | #endif |
788 | if (*new_table != NULL) | |
789 | acpi_table_taint(existing_table); | |
790 | return AE_OK; | |
791 | } | |
792 | ||
1da177e4 LT |
793 | /* |
794 | * acpi_table_init() | |
795 | * | |
796 | * find RSDP, find and checksum SDT/XSDT. | |
797 | * checksum all tables, print SDT/XSDT | |
5f3b1a8b | 798 | * |
1da177e4 LT |
799 | * result: sdt_entry[] is initialized |
800 | */ | |
801 | ||
4be44fcd | 802 | int __init acpi_table_init(void) |
1da177e4 | 803 | { |
9e3a9d1e LB |
804 | acpi_status status; |
805 | ||
4fc0a7e8 LZ |
806 | if (acpi_verify_table_checksum) { |
807 | pr_info("Early table checksum verification enabled\n"); | |
023e2ee1 | 808 | acpi_gbl_enable_table_validation = TRUE; |
4fc0a7e8 LZ |
809 | } else { |
810 | pr_info("Early table checksum verification disabled\n"); | |
023e2ee1 | 811 | acpi_gbl_enable_table_validation = FALSE; |
4fc0a7e8 LZ |
812 | } |
813 | ||
9e3a9d1e LB |
814 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
815 | if (ACPI_FAILURE(status)) | |
95df812d | 816 | return -EINVAL; |
5ae74f2c | 817 | acpi_table_initrd_scan(); |
9e3a9d1e | 818 | |
a1fdcc0d LB |
819 | check_multiple_madt(); |
820 | return 0; | |
821 | } | |
822 | ||
823 | static int __init acpi_parse_apic_instance(char *str) | |
824 | { | |
f0df2d6b CG |
825 | if (!str) |
826 | return -EINVAL; | |
a1fdcc0d | 827 | |
3d915894 CJ |
828 | if (kstrtoint(str, 0, &acpi_apic_instance)) |
829 | return -EINVAL; | |
a1fdcc0d | 830 | |
730bf5eb | 831 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
a1fdcc0d | 832 | |
1da177e4 LT |
833 | return 0; |
834 | } | |
a1fdcc0d | 835 | early_param("acpi_apic_instance", acpi_parse_apic_instance); |
4fc0a7e8 LZ |
836 | |
837 | static int __init acpi_force_table_verification_setup(char *s) | |
838 | { | |
839 | acpi_verify_table_checksum = true; | |
840 | ||
841 | return 0; | |
842 | } | |
4fc0a7e8 | 843 | early_param("acpi_force_table_verification", acpi_force_table_verification_setup); |
b2ca5dae CIK |
844 | |
845 | static int __init acpi_force_32bit_fadt_addr(char *s) | |
846 | { | |
847 | pr_info("Forcing 32 Bit FADT addresses\n"); | |
848 | acpi_gbl_use32_bit_fadt_addresses = TRUE; | |
849 | ||
850 | return 0; | |
851 | } | |
b2ca5dae | 852 | early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr); |