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> |
658aafc8 | 24 | #include <linux/kmemleak.h> |
c85cc817 | 25 | #include "internal.h" |
1da177e4 | 26 | |
74216699 RW |
27 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
28 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
29 | #endif | |
30 | ||
04348e69 | 31 | #define ACPI_MAX_TABLES 128 |
1da177e4 | 32 | |
1da177e4 LT |
33 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
34 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; | |
35 | ||
ad71860a | 36 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
1da177e4 | 37 | |
f64bd790 | 38 | static int acpi_apic_instance __initdata_or_acpilib; |
a1fdcc0d | 39 | |
60574d1e KB |
40 | enum acpi_subtable_type { |
41 | ACPI_SUBTABLE_COMMON, | |
3bc0e8eb | 42 | ACPI_SUBTABLE_HMAT, |
cefc7ca4 | 43 | ACPI_SUBTABLE_PRMT, |
ad2f6397 | 44 | ACPI_SUBTABLE_CEDT, |
60574d1e KB |
45 | }; |
46 | ||
47 | struct acpi_subtable_entry { | |
48 | union acpi_subtable_headers *hdr; | |
49 | enum acpi_subtable_type type; | |
50 | }; | |
51 | ||
4fc0a7e8 LZ |
52 | /* |
53 | * Disable table checksum verification for the early stage due to the size | |
54 | * limitation of the current x86 early mapping implementation. | |
55 | */ | |
f64bd790 | 56 | static bool acpi_verify_table_checksum __initdata_or_acpilib = false; |
4fc0a7e8 | 57 | |
a1fdcc0d | 58 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
1da177e4 LT |
59 | { |
60 | if (!header) | |
61 | return; | |
62 | ||
63 | switch (header->type) { | |
64 | ||
5f3b1a8b | 65 | case ACPI_MADT_TYPE_LOCAL_APIC: |
4be44fcd | 66 | { |
5f3b1a8b AS |
67 | struct acpi_madt_local_apic *p = |
68 | (struct acpi_madt_local_apic *)header; | |
07f438df HG |
69 | pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
70 | p->processor_id, p->id, | |
71 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 72 | } |
1da177e4 LT |
73 | break; |
74 | ||
7237d3de SS |
75 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
76 | { | |
77 | struct acpi_madt_local_x2apic *p = | |
78 | (struct acpi_madt_local_x2apic *)header; | |
07f438df HG |
79 | pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
80 | p->local_apic_id, p->uid, | |
81 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
7237d3de SS |
82 | } |
83 | break; | |
84 | ||
5f3b1a8b | 85 | case ACPI_MADT_TYPE_IO_APIC: |
4be44fcd | 86 | { |
5f3b1a8b AS |
87 | struct acpi_madt_io_apic *p = |
88 | (struct acpi_madt_io_apic *)header; | |
07f438df HG |
89 | pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
90 | p->id, p->address, p->global_irq_base); | |
4be44fcd | 91 | } |
1da177e4 LT |
92 | break; |
93 | ||
5f3b1a8b | 94 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
4be44fcd | 95 | { |
5f3b1a8b AS |
96 | struct acpi_madt_interrupt_override *p = |
97 | (struct acpi_madt_interrupt_override *)header; | |
730bf5eb HG |
98 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
99 | p->bus, p->source_irq, p->global_irq, | |
100 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
101 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); | |
5f3b1a8b AS |
102 | if (p->inti_flags & |
103 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) | |
730bf5eb HG |
104 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
105 | p->inti_flags & | |
5f3b1a8b | 106 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
4be44fcd | 107 | } |
1da177e4 LT |
108 | break; |
109 | ||
5f3b1a8b | 110 | case ACPI_MADT_TYPE_NMI_SOURCE: |
4be44fcd | 111 | { |
5f3b1a8b AS |
112 | struct acpi_madt_nmi_source *p = |
113 | (struct acpi_madt_nmi_source *)header; | |
730bf5eb HG |
114 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
115 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
116 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
117 | p->global_irq); | |
4be44fcd | 118 | } |
1da177e4 LT |
119 | break; |
120 | ||
5f3b1a8b | 121 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
4be44fcd | 122 | { |
5f3b1a8b AS |
123 | struct acpi_madt_local_apic_nmi *p = |
124 | (struct acpi_madt_local_apic_nmi *)header; | |
730bf5eb HG |
125 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
126 | p->processor_id, | |
127 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], | |
128 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
129 | p->lint); | |
7237d3de SS |
130 | } |
131 | break; | |
132 | ||
133 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: | |
134 | { | |
135 | u16 polarity, trigger; | |
136 | struct acpi_madt_local_x2apic_nmi *p = | |
137 | (struct acpi_madt_local_x2apic_nmi *)header; | |
138 | ||
139 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; | |
140 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
141 | ||
730bf5eb HG |
142 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
143 | p->uid, | |
144 | mps_inti_flags_polarity[polarity], | |
145 | mps_inti_flags_trigger[trigger], | |
146 | p->lint); | |
4be44fcd | 147 | } |
1da177e4 LT |
148 | break; |
149 | ||
5f3b1a8b | 150 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
4be44fcd | 151 | { |
5f3b1a8b AS |
152 | struct acpi_madt_local_apic_override *p = |
153 | (struct acpi_madt_local_apic_override *)header; | |
0b1be2c0 VH |
154 | pr_info("LAPIC_ADDR_OVR (address[0x%llx])\n", |
155 | p->address); | |
4be44fcd | 156 | } |
1da177e4 LT |
157 | break; |
158 | ||
5f3b1a8b | 159 | case ACPI_MADT_TYPE_IO_SAPIC: |
4be44fcd | 160 | { |
5f3b1a8b AS |
161 | struct acpi_madt_io_sapic *p = |
162 | (struct acpi_madt_io_sapic *)header; | |
07f438df HG |
163 | pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
164 | p->id, (void *)(unsigned long)p->address, | |
165 | p->global_irq_base); | |
4be44fcd | 166 | } |
1da177e4 LT |
167 | break; |
168 | ||
5f3b1a8b | 169 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
4be44fcd | 170 | { |
5f3b1a8b AS |
171 | struct acpi_madt_local_sapic *p = |
172 | (struct acpi_madt_local_sapic *)header; | |
07f438df HG |
173 | pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
174 | p->processor_id, p->id, p->eid, | |
175 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 176 | } |
1da177e4 LT |
177 | break; |
178 | ||
5f3b1a8b | 179 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
4be44fcd | 180 | { |
5f3b1a8b AS |
181 | struct acpi_madt_interrupt_source *p = |
182 | (struct acpi_madt_interrupt_source *)header; | |
730bf5eb HG |
183 | 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", |
184 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
185 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
186 | p->type, p->id, p->eid, p->io_sapic_vector, | |
187 | p->global_irq); | |
4be44fcd | 188 | } |
1da177e4 LT |
189 | break; |
190 | ||
4c1c8d7a HG |
191 | case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
192 | { | |
193 | struct acpi_madt_generic_interrupt *p = | |
194 | (struct acpi_madt_generic_interrupt *)header; | |
195 | pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", | |
196 | p->uid, p->base_address, | |
197 | p->arm_mpidr, | |
198 | (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
199 | ||
200 | } | |
201 | break; | |
202 | ||
203 | case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: | |
204 | { | |
205 | struct acpi_madt_generic_distributor *p = | |
206 | (struct acpi_madt_generic_distributor *)header; | |
207 | pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", | |
208 | p->gic_id, p->base_address, | |
209 | p->global_irq_base); | |
210 | } | |
211 | break; | |
212 | ||
1da177e4 | 213 | default: |
730bf5eb HG |
214 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
215 | header->type); | |
1da177e4 LT |
216 | break; |
217 | } | |
218 | } | |
219 | ||
f64bd790 | 220 | static unsigned long __init_or_acpilib |
60574d1e KB |
221 | acpi_get_entry_type(struct acpi_subtable_entry *entry) |
222 | { | |
223 | switch (entry->type) { | |
224 | case ACPI_SUBTABLE_COMMON: | |
225 | return entry->hdr->common.type; | |
3bc0e8eb KB |
226 | case ACPI_SUBTABLE_HMAT: |
227 | return entry->hdr->hmat.type; | |
cefc7ca4 EK |
228 | case ACPI_SUBTABLE_PRMT: |
229 | return 0; | |
ad2f6397 DW |
230 | case ACPI_SUBTABLE_CEDT: |
231 | return entry->hdr->cedt.type; | |
60574d1e KB |
232 | } |
233 | return 0; | |
234 | } | |
235 | ||
f64bd790 | 236 | static unsigned long __init_or_acpilib |
60574d1e KB |
237 | acpi_get_entry_length(struct acpi_subtable_entry *entry) |
238 | { | |
239 | switch (entry->type) { | |
240 | case ACPI_SUBTABLE_COMMON: | |
241 | return entry->hdr->common.length; | |
3bc0e8eb KB |
242 | case ACPI_SUBTABLE_HMAT: |
243 | return entry->hdr->hmat.length; | |
cefc7ca4 EK |
244 | case ACPI_SUBTABLE_PRMT: |
245 | return entry->hdr->prmt.length; | |
ad2f6397 DW |
246 | case ACPI_SUBTABLE_CEDT: |
247 | return entry->hdr->cedt.length; | |
60574d1e KB |
248 | } |
249 | return 0; | |
250 | } | |
251 | ||
f64bd790 | 252 | static unsigned long __init_or_acpilib |
60574d1e KB |
253 | acpi_get_subtable_header_length(struct acpi_subtable_entry *entry) |
254 | { | |
255 | switch (entry->type) { | |
256 | case ACPI_SUBTABLE_COMMON: | |
257 | return sizeof(entry->hdr->common); | |
3bc0e8eb KB |
258 | case ACPI_SUBTABLE_HMAT: |
259 | return sizeof(entry->hdr->hmat); | |
cefc7ca4 EK |
260 | case ACPI_SUBTABLE_PRMT: |
261 | return sizeof(entry->hdr->prmt); | |
ad2f6397 DW |
262 | case ACPI_SUBTABLE_CEDT: |
263 | return sizeof(entry->hdr->cedt); | |
60574d1e KB |
264 | } |
265 | return 0; | |
266 | } | |
267 | ||
f64bd790 | 268 | static enum acpi_subtable_type __init_or_acpilib |
60574d1e KB |
269 | acpi_get_subtable_type(char *id) |
270 | { | |
3bc0e8eb KB |
271 | if (strncmp(id, ACPI_SIG_HMAT, 4) == 0) |
272 | return ACPI_SUBTABLE_HMAT; | |
cefc7ca4 EK |
273 | if (strncmp(id, ACPI_SIG_PRMT, 4) == 0) |
274 | return ACPI_SUBTABLE_PRMT; | |
ad2f6397 DW |
275 | if (strncmp(id, ACPI_SIG_CEDT, 4) == 0) |
276 | return ACPI_SUBTABLE_CEDT; | |
60574d1e KB |
277 | return ACPI_SUBTABLE_COMMON; |
278 | } | |
279 | ||
2d03e46a DW |
280 | static __init_or_acpilib bool has_handler(struct acpi_subtable_proc *proc) |
281 | { | |
282 | return proc->handler || proc->handler_arg; | |
283 | } | |
284 | ||
285 | static __init_or_acpilib int call_handler(struct acpi_subtable_proc *proc, | |
286 | union acpi_subtable_headers *hdr, | |
287 | unsigned long end) | |
288 | { | |
289 | if (proc->handler) | |
290 | return proc->handler(hdr, end); | |
291 | if (proc->handler_arg) | |
292 | return proc->handler_arg(hdr, proc->arg, end); | |
293 | return -EINVAL; | |
294 | } | |
295 | ||
9b3fedde LA |
296 | /** |
297 | * acpi_parse_entries_array - for each proc_num find a suitable subtable | |
298 | * | |
299 | * @id: table id (for debugging purposes) | |
904aaf80 | 300 | * @table_size: size of the root table |
9b3fedde LA |
301 | * @table_header: where does the table start? |
302 | * @proc: array of acpi_subtable_proc struct containing entry id | |
303 | * and associated handler with it | |
304 | * @proc_num: how big proc is? | |
305 | * @max_entries: how many entries can we process? | |
306 | * | |
307 | * For each proc_num find a subtable with proc->id and run proc->handler | |
308 | * on it. Assumption is that there's only single handler for particular | |
309 | * entry id. | |
310 | * | |
904aaf80 AS |
311 | * The table_size is not the size of the complete ACPI table (the length |
312 | * field in the header struct), but only the size of the root table; i.e., | |
313 | * the offset from the very first byte of the complete ACPI table, to the | |
314 | * first byte of the very first subtable. | |
315 | * | |
9b3fedde LA |
316 | * On success returns sum of all matching entries for all proc handlers. |
317 | * Otherwise, -ENODEV or -EINVAL is returned. | |
318 | */ | |
f64bd790 DW |
319 | static int __init_or_acpilib acpi_parse_entries_array( |
320 | char *id, unsigned long table_size, | |
321 | struct acpi_table_header *table_header, struct acpi_subtable_proc *proc, | |
322 | int proc_num, unsigned int max_entries) | |
1da177e4 | 323 | { |
60574d1e KB |
324 | struct acpi_subtable_entry entry; |
325 | unsigned long table_end, subtable_len, entry_len; | |
9b3fedde | 326 | int count = 0; |
8726d4f4 | 327 | int errs = 0; |
9b3fedde | 328 | int i; |
1da177e4 | 329 | |
6eb87fed | 330 | table_end = (unsigned long)table_header + table_header->length; |
1da177e4 LT |
331 | |
332 | /* Parse all entries looking for a match. */ | |
333 | ||
60574d1e KB |
334 | entry.type = acpi_get_subtable_type(id); |
335 | entry.hdr = (union acpi_subtable_headers *) | |
6eb87fed | 336 | ((unsigned long)table_header + table_size); |
60574d1e | 337 | subtable_len = acpi_get_subtable_header_length(&entry); |
1da177e4 | 338 | |
60574d1e | 339 | while (((unsigned long)entry.hdr) + subtable_len < table_end) { |
9b3fedde LA |
340 | if (max_entries && count >= max_entries) |
341 | break; | |
342 | ||
343 | for (i = 0; i < proc_num; i++) { | |
60574d1e | 344 | if (acpi_get_entry_type(&entry) != proc[i].id) |
9b3fedde | 345 | continue; |
2d03e46a DW |
346 | if (!has_handler(&proc[i]) || |
347 | (!errs && | |
348 | call_handler(&proc[i], entry.hdr, table_end))) { | |
8726d4f4 AS |
349 | errs++; |
350 | continue; | |
351 | } | |
369d913b | 352 | |
fa162a05 | 353 | proc[i].count++; |
9b3fedde | 354 | break; |
4ceacd02 | 355 | } |
9b3fedde LA |
356 | if (i != proc_num) |
357 | count++; | |
4ceacd02 | 358 | |
369d913b FY |
359 | /* |
360 | * If entry->length is 0, break from this loop to avoid | |
361 | * infinite loop. | |
362 | */ | |
60574d1e KB |
363 | entry_len = acpi_get_entry_length(&entry); |
364 | if (entry_len == 0) { | |
9b3fedde | 365 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
f08bb472 | 366 | return -EINVAL; |
369d913b | 367 | } |
1da177e4 | 368 | |
60574d1e KB |
369 | entry.hdr = (union acpi_subtable_headers *) |
370 | ((unsigned long)entry.hdr + entry_len); | |
1da177e4 | 371 | } |
f08bb472 | 372 | |
1da177e4 | 373 | if (max_entries && count > max_entries) { |
99b0efd7 AS |
374 | pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n", |
375 | id, proc->id, count); | |
1da177e4 LT |
376 | } |
377 | ||
8726d4f4 | 378 | return errs ? -EINVAL : count; |
f08bb472 AC |
379 | } |
380 | ||
f64bd790 DW |
381 | int __init_or_acpilib acpi_table_parse_entries_array( |
382 | char *id, unsigned long table_size, struct acpi_subtable_proc *proc, | |
383 | int proc_num, unsigned int max_entries) | |
f08bb472 AC |
384 | { |
385 | struct acpi_table_header *table_header = NULL; | |
f08bb472 AC |
386 | int count; |
387 | u32 instance = 0; | |
388 | ||
389 | if (acpi_disabled) | |
390 | return -ENODEV; | |
391 | ||
9b3fedde | 392 | if (!id) |
f08bb472 AC |
393 | return -EINVAL; |
394 | ||
24194a7e HG |
395 | if (!table_size) |
396 | return -EINVAL; | |
397 | ||
f08bb472 AC |
398 | if (!strncmp(id, ACPI_SIG_MADT, 4)) |
399 | instance = acpi_apic_instance; | |
400 | ||
6b11d1d6 | 401 | acpi_get_table(id, instance, &table_header); |
f08bb472 | 402 | if (!table_header) { |
f98da1d6 | 403 | pr_debug("%4.4s not present\n", id); |
f08bb472 AC |
404 | return -ENODEV; |
405 | } | |
406 | ||
9b3fedde LA |
407 | count = acpi_parse_entries_array(id, table_size, table_header, |
408 | proc, proc_num, max_entries); | |
f08bb472 | 409 | |
6b11d1d6 | 410 | acpi_put_table(table_header); |
f08bb472 | 411 | return count; |
1da177e4 LT |
412 | } |
413 | ||
2d03e46a DW |
414 | static int __init_or_acpilib __acpi_table_parse_entries( |
415 | char *id, unsigned long table_size, int entry_id, | |
416 | acpi_tbl_entry_handler handler, acpi_tbl_entry_handler_arg handler_arg, | |
417 | void *arg, unsigned int max_entries) | |
9b3fedde LA |
418 | { |
419 | struct acpi_subtable_proc proc = { | |
420 | .id = entry_id, | |
421 | .handler = handler, | |
2d03e46a DW |
422 | .handler_arg = handler_arg, |
423 | .arg = arg, | |
9b3fedde LA |
424 | }; |
425 | ||
426 | return acpi_table_parse_entries_array(id, table_size, &proc, 1, | |
427 | max_entries); | |
428 | } | |
429 | ||
2d03e46a DW |
430 | int __init_or_acpilib |
431 | acpi_table_parse_cedt(enum acpi_cedt_type id, | |
432 | acpi_tbl_entry_handler_arg handler_arg, void *arg) | |
433 | { | |
434 | return __acpi_table_parse_entries(ACPI_SIG_CEDT, | |
435 | sizeof(struct acpi_table_cedt), id, | |
436 | NULL, handler_arg, arg, 0); | |
437 | } | |
438 | EXPORT_SYMBOL_ACPI_LIB(acpi_table_parse_cedt); | |
439 | ||
440 | int __init acpi_table_parse_entries(char *id, unsigned long table_size, | |
441 | int entry_id, | |
442 | acpi_tbl_entry_handler handler, | |
443 | unsigned int max_entries) | |
444 | { | |
445 | return __acpi_table_parse_entries(id, table_size, entry_id, handler, | |
446 | NULL, NULL, max_entries); | |
447 | } | |
448 | ||
2e018c59 | 449 | int __init acpi_table_parse_madt(enum acpi_madt_type id, |
b43e1065 | 450 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
1da177e4 | 451 | { |
6eb87fed | 452 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
4be44fcd LB |
453 | sizeof(struct acpi_table_madt), id, |
454 | handler, max_entries); | |
1da177e4 LT |
455 | } |
456 | ||
7f8f97c3 LB |
457 | /** |
458 | * acpi_table_parse - find table with @id, run @handler on it | |
7f8f97c3 LB |
459 | * @id: table id to find |
460 | * @handler: handler to run | |
461 | * | |
462 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, | |
f8a571b2 | 463 | * run @handler on it. |
464 | * | |
465 | * Return 0 if table found, -errno if not. | |
7f8f97c3 | 466 | */ |
b43e1065 | 467 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
1da177e4 | 468 | { |
ceb6c468 | 469 | struct acpi_table_header *table = NULL; |
a1fdcc0d | 470 | |
68ca4069 | 471 | if (acpi_disabled) |
e5b8fc6a LB |
472 | return -ENODEV; |
473 | ||
de2d1a7e | 474 | if (!id || !handler) |
1da177e4 LT |
475 | return -EINVAL; |
476 | ||
a1fdcc0d | 477 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
6b11d1d6 | 478 | acpi_get_table(id, acpi_apic_instance, &table); |
a1fdcc0d | 479 | else |
6b11d1d6 | 480 | acpi_get_table(id, 0, &table); |
a1fdcc0d | 481 | |
ceb6c468 AS |
482 | if (table) { |
483 | handler(table); | |
6b11d1d6 | 484 | acpi_put_table(table); |
ceb6c468 | 485 | return 0; |
7f8f97c3 | 486 | } else |
95df812d | 487 | return -ENODEV; |
1da177e4 LT |
488 | } |
489 | ||
904aaf80 | 490 | /* |
a1fdcc0d LB |
491 | * The BIOS is supposed to supply a single APIC/MADT, |
492 | * but some report two. Provide a knob to use either. | |
493 | * (don't you wish instance 0 and 1 were not the same?) | |
494 | */ | |
495 | static void __init check_multiple_madt(void) | |
496 | { | |
497 | struct acpi_table_header *table = NULL; | |
498 | ||
6b11d1d6 | 499 | acpi_get_table(ACPI_SIG_MADT, 2, &table); |
a1fdcc0d | 500 | if (table) { |
730bf5eb HG |
501 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
502 | acpi_apic_instance); | |
503 | pr_warn("If \"acpi_apic_instance=%d\" works better, " | |
504 | "notify linux-acpi@vger.kernel.org\n", | |
505 | acpi_apic_instance ? 0 : 2); | |
6b11d1d6 | 506 | acpi_put_table(table); |
a1fdcc0d LB |
507 | |
508 | } else | |
509 | acpi_apic_instance = 0; | |
510 | ||
511 | return; | |
512 | } | |
513 | ||
5ae74f2c LZ |
514 | static void acpi_table_taint(struct acpi_table_header *table) |
515 | { | |
516 | pr_warn("Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
517 | table->signature, table->oem_table_id); | |
518 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); | |
519 | } | |
520 | ||
5d881327 | 521 | #ifdef CONFIG_ACPI_TABLE_UPGRADE |
5ae74f2c LZ |
522 | static u64 acpi_tables_addr; |
523 | static int all_tables_size; | |
524 | ||
525 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
526 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) | |
527 | { | |
528 | u8 sum = 0; | |
529 | u8 *end = buffer + length; | |
530 | ||
531 | while (buffer < end) | |
532 | sum = (u8) (sum + *(buffer++)); | |
533 | return sum; | |
534 | } | |
535 | ||
536 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
2229a12b | 537 | static const char table_sigs[][ACPI_NAMESEG_SIZE] __initconst = { |
c78fea61 AO |
538 | ACPI_SIG_BERT, ACPI_SIG_BGRT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, |
539 | ACPI_SIG_EINJ, ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, | |
540 | ACPI_SIG_MSCT, ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, | |
541 | ACPI_SIG_ASF, ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, | |
542 | ACPI_SIG_HPET, ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, | |
543 | ACPI_SIG_MCHI, ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, | |
544 | ACPI_SIG_TCPA, ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, | |
545 | ACPI_SIG_WDDT, ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, | |
546 | ACPI_SIG_PSDT, ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, | |
547 | ACPI_SIG_IORT, ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT, | |
e86801b0 | 548 | ACPI_SIG_NHLT, ACPI_SIG_AEST, ACPI_SIG_CEDT, ACPI_SIG_AGDI }; |
5ae74f2c LZ |
549 | |
550 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) | |
551 | ||
5d881327 LZ |
552 | #define NR_ACPI_INITRD_TABLES 64 |
553 | static struct cpio_data __initdata acpi_initrd_files[NR_ACPI_INITRD_TABLES]; | |
554 | static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES); | |
5ae74f2c LZ |
555 | |
556 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
557 | ||
da3d3f98 | 558 | void __init acpi_table_upgrade(void) |
5ae74f2c | 559 | { |
98a455d9 SY |
560 | void *data; |
561 | size_t size; | |
5ae74f2c LZ |
562 | int sig, no, table_nr = 0, total_offset = 0; |
563 | long offset = 0; | |
564 | struct acpi_table_header *table; | |
565 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
566 | struct cpio_data file; | |
567 | ||
98a455d9 SY |
568 | if (IS_ENABLED(CONFIG_ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD)) { |
569 | data = __initramfs_start; | |
570 | size = __initramfs_size; | |
571 | } else { | |
572 | data = (void *)initrd_start; | |
573 | size = initrd_end - initrd_start; | |
574 | } | |
575 | ||
5ae74f2c LZ |
576 | if (data == NULL || size == 0) |
577 | return; | |
578 | ||
5d881327 | 579 | for (no = 0; no < NR_ACPI_INITRD_TABLES; no++) { |
5ae74f2c LZ |
580 | file = find_cpio_data(cpio_path, data, size, &offset); |
581 | if (!file.data) | |
582 | break; | |
583 | ||
584 | data += offset; | |
585 | size -= offset; | |
586 | ||
587 | if (file.size < sizeof(struct acpi_table_header)) { | |
588 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
589 | cpio_path, file.name); | |
590 | continue; | |
591 | } | |
592 | ||
593 | table = file.data; | |
594 | ||
2229a12b | 595 | for (sig = 0; sig < ARRAY_SIZE(table_sigs); sig++) |
5ae74f2c LZ |
596 | if (!memcmp(table->signature, table_sigs[sig], 4)) |
597 | break; | |
598 | ||
2229a12b | 599 | if (sig >= ARRAY_SIZE(table_sigs)) { |
5ae74f2c LZ |
600 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", |
601 | cpio_path, file.name); | |
602 | continue; | |
603 | } | |
604 | if (file.size != table->length) { | |
605 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
606 | cpio_path, file.name); | |
607 | continue; | |
608 | } | |
609 | if (acpi_table_checksum(file.data, table->length)) { | |
610 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
611 | cpio_path, file.name); | |
612 | continue; | |
613 | } | |
614 | ||
615 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
616 | table->signature, cpio_path, file.name, table->length); | |
617 | ||
618 | all_tables_size += table->length; | |
619 | acpi_initrd_files[table_nr].data = file.data; | |
620 | acpi_initrd_files[table_nr].size = file.size; | |
621 | table_nr++; | |
622 | } | |
623 | if (table_nr == 0) | |
624 | return; | |
625 | ||
6ea0e815 LC |
626 | if (security_locked_down(LOCKDOWN_ACPI_TABLES)) { |
627 | pr_notice("kernel is locked down, ignoring table override\n"); | |
628 | return; | |
629 | } | |
630 | ||
5ae74f2c | 631 | acpi_tables_addr = |
a7259df7 MR |
632 | memblock_phys_alloc_range(all_tables_size, PAGE_SIZE, |
633 | 0, ACPI_TABLE_UPGRADE_MAX_PHYS); | |
5ae74f2c LZ |
634 | if (!acpi_tables_addr) { |
635 | WARN_ON(1); | |
636 | return; | |
637 | } | |
638 | /* | |
639 | * Only calling e820_add_reserve does not work and the | |
640 | * tables are invalid (memory got used) later. | |
641 | * memblock_reserve works as expected and the tables won't get modified. | |
642 | * But it's not enough on X86 because ioremap will | |
643 | * complain later (used by acpi_os_map_memory) that the pages | |
644 | * that should get mapped are not marked "reserved". | |
ab6bc04c | 645 | * Both memblock_reserve and e820__range_add (via arch_reserve_mem_area) |
5ae74f2c LZ |
646 | * works fine. |
647 | */ | |
5ae74f2c LZ |
648 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
649 | ||
658aafc8 MR |
650 | kmemleak_ignore_phys(acpi_tables_addr); |
651 | ||
5ae74f2c LZ |
652 | /* |
653 | * early_ioremap only can remap 256k one time. If we map all | |
654 | * tables one time, we will hit the limit. Need to map chunks | |
655 | * one by one during copying the same as that in relocate_initrd(). | |
656 | */ | |
657 | for (no = 0; no < table_nr; no++) { | |
658 | unsigned char *src_p = acpi_initrd_files[no].data; | |
659 | phys_addr_t size = acpi_initrd_files[no].size; | |
660 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
661 | phys_addr_t slop, clen; | |
662 | char *dest_p; | |
663 | ||
664 | total_offset += size; | |
665 | ||
666 | while (size) { | |
667 | slop = dest_addr & ~PAGE_MASK; | |
668 | clen = size; | |
669 | if (clen > MAP_CHUNK_SIZE - slop) | |
670 | clen = MAP_CHUNK_SIZE - slop; | |
ce0c1fcc AM |
671 | dest_p = early_memremap(dest_addr & PAGE_MASK, |
672 | clen + slop); | |
5ae74f2c | 673 | memcpy(dest_p + slop, src_p, clen); |
ce0c1fcc | 674 | early_memunmap(dest_p, clen + slop); |
5ae74f2c LZ |
675 | src_p += clen; |
676 | dest_addr += clen; | |
677 | size -= clen; | |
678 | } | |
679 | } | |
680 | } | |
681 | ||
682 | static acpi_status | |
683 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
684 | acpi_physical_address *address, u32 *length) | |
685 | { | |
686 | int table_offset = 0; | |
687 | int table_index = 0; | |
688 | struct acpi_table_header *table; | |
689 | u32 table_length; | |
690 | ||
691 | *length = 0; | |
692 | *address = 0; | |
693 | if (!acpi_tables_addr) | |
694 | return AE_OK; | |
695 | ||
696 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
697 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
698 | ACPI_HEADER_SIZE); | |
699 | if (table_offset + table->length > all_tables_size) { | |
700 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
701 | WARN_ON(1); | |
702 | return AE_OK; | |
703 | } | |
704 | ||
705 | table_length = table->length; | |
706 | ||
707 | /* Only override tables matched */ | |
5d881327 LZ |
708 | if (memcmp(existing_table->signature, table->signature, 4) || |
709 | memcmp(table->oem_id, existing_table->oem_id, | |
710 | ACPI_OEM_ID_SIZE) || | |
5ae74f2c LZ |
711 | memcmp(table->oem_table_id, existing_table->oem_table_id, |
712 | ACPI_OEM_TABLE_ID_SIZE)) { | |
713 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
714 | goto next_table; | |
715 | } | |
5d881327 LZ |
716 | /* |
717 | * Mark the table to avoid being used in | |
718 | * acpi_table_initrd_scan() and check the revision. | |
719 | */ | |
720 | if (test_and_set_bit(table_index, acpi_initrd_installed) || | |
721 | existing_table->oem_revision >= table->oem_revision) { | |
722 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
723 | goto next_table; | |
724 | } | |
5ae74f2c LZ |
725 | |
726 | *length = table_length; | |
727 | *address = acpi_tables_addr + table_offset; | |
5d881327 LZ |
728 | pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n", |
729 | table->signature, table->oem_id, | |
730 | table->oem_table_id); | |
5ae74f2c | 731 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
5ae74f2c LZ |
732 | break; |
733 | ||
734 | next_table: | |
735 | table_offset += table_length; | |
736 | table_index++; | |
737 | } | |
738 | return AE_OK; | |
739 | } | |
740 | ||
741 | static void __init acpi_table_initrd_scan(void) | |
742 | { | |
743 | int table_offset = 0; | |
744 | int table_index = 0; | |
745 | u32 table_length; | |
746 | struct acpi_table_header *table; | |
747 | ||
748 | if (!acpi_tables_addr) | |
749 | return; | |
750 | ||
751 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
752 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
753 | ACPI_HEADER_SIZE); | |
754 | if (table_offset + table->length > all_tables_size) { | |
755 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
756 | WARN_ON(1); | |
757 | return; | |
758 | } | |
759 | ||
760 | table_length = table->length; | |
761 | ||
762 | /* Skip RSDT/XSDT which should only be used for override */ | |
5599fb69 BM |
763 | if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_RSDT) || |
764 | ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_XSDT)) { | |
5ae74f2c LZ |
765 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
766 | goto next_table; | |
767 | } | |
5d881327 LZ |
768 | /* |
769 | * Mark the table to avoid being used in | |
770 | * acpi_table_initrd_override(). Though this is not possible | |
5d6e5966 | 771 | * because override is disabled in acpi_install_physical_table(). |
5d881327 LZ |
772 | */ |
773 | if (test_and_set_bit(table_index, acpi_initrd_installed)) { | |
774 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
775 | goto next_table; | |
776 | } | |
5ae74f2c | 777 | |
5d881327 LZ |
778 | pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n", |
779 | table->signature, table->oem_id, | |
780 | table->oem_table_id); | |
5ae74f2c | 781 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
5d6e5966 | 782 | acpi_install_physical_table(acpi_tables_addr + table_offset); |
5ae74f2c LZ |
783 | next_table: |
784 | table_offset += table_length; | |
785 | table_index++; | |
786 | } | |
787 | } | |
788 | #else | |
5ae74f2c LZ |
789 | static acpi_status |
790 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
791 | acpi_physical_address *address, | |
792 | u32 *table_length) | |
793 | { | |
794 | *table_length = 0; | |
795 | *address = 0; | |
796 | return AE_OK; | |
797 | } | |
798 | ||
799 | static void __init acpi_table_initrd_scan(void) | |
800 | { | |
801 | } | |
5d881327 | 802 | #endif /* CONFIG_ACPI_TABLE_UPGRADE */ |
5ae74f2c LZ |
803 | |
804 | acpi_status | |
805 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
806 | acpi_physical_address *address, | |
807 | u32 *table_length) | |
808 | { | |
809 | return acpi_table_initrd_override(existing_table, address, | |
810 | table_length); | |
811 | } | |
812 | ||
1f000e1b | 813 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
82e4eb4e WD |
814 | static void *amlcode __attribute__ ((weakref("AmlCode"))); |
815 | static void *dsdt_amlcode __attribute__ ((weakref("dsdt_aml_code"))); | |
1f000e1b | 816 | #endif |
82e4eb4e | 817 | |
2e018c59 | 818 | acpi_status acpi_os_table_override(struct acpi_table_header *existing_table, |
5ae74f2c LZ |
819 | struct acpi_table_header **new_table) |
820 | { | |
821 | if (!existing_table || !new_table) | |
822 | return AE_BAD_PARAMETER; | |
823 | ||
824 | *new_table = NULL; | |
825 | ||
826 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
82e4eb4e WD |
827 | if (!strncmp(existing_table->signature, "DSDT", 4)) { |
828 | *new_table = (struct acpi_table_header *)&amlcode; | |
829 | if (!(*new_table)) | |
830 | *new_table = (struct acpi_table_header *)&dsdt_amlcode; | |
831 | } | |
5ae74f2c LZ |
832 | #endif |
833 | if (*new_table != NULL) | |
834 | acpi_table_taint(existing_table); | |
835 | return AE_OK; | |
836 | } | |
837 | ||
1da177e4 | 838 | /* |
1a1c130a | 839 | * acpi_locate_initial_tables() |
1da177e4 LT |
840 | * |
841 | * find RSDP, find and checksum SDT/XSDT. | |
842 | * checksum all tables, print SDT/XSDT | |
5f3b1a8b | 843 | * |
1da177e4 LT |
844 | * result: sdt_entry[] is initialized |
845 | */ | |
846 | ||
1a1c130a | 847 | int __init acpi_locate_initial_tables(void) |
1da177e4 | 848 | { |
9e3a9d1e LB |
849 | acpi_status status; |
850 | ||
4fc0a7e8 LZ |
851 | if (acpi_verify_table_checksum) { |
852 | pr_info("Early table checksum verification enabled\n"); | |
023e2ee1 | 853 | acpi_gbl_enable_table_validation = TRUE; |
4fc0a7e8 LZ |
854 | } else { |
855 | pr_info("Early table checksum verification disabled\n"); | |
023e2ee1 | 856 | acpi_gbl_enable_table_validation = FALSE; |
4fc0a7e8 LZ |
857 | } |
858 | ||
9e3a9d1e LB |
859 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
860 | if (ACPI_FAILURE(status)) | |
95df812d | 861 | return -EINVAL; |
9e3a9d1e | 862 | |
1a1c130a RW |
863 | return 0; |
864 | } | |
865 | ||
866 | void __init acpi_reserve_initial_tables(void) | |
867 | { | |
868 | int i; | |
869 | ||
870 | for (i = 0; i < ACPI_MAX_TABLES; i++) { | |
871 | struct acpi_table_desc *table_desc = &initial_tables[i]; | |
872 | u64 start = table_desc->address; | |
873 | u64 size = table_desc->length; | |
874 | ||
875 | if (!start || !size) | |
876 | break; | |
877 | ||
878 | pr_info("Reserving %4s table memory at [mem 0x%llx-0x%llx]\n", | |
879 | table_desc->signature.ascii, start, start + size - 1); | |
880 | ||
881 | memblock_reserve(start, size); | |
882 | } | |
883 | } | |
884 | ||
885 | void __init acpi_table_init_complete(void) | |
886 | { | |
887 | acpi_table_initrd_scan(); | |
a1fdcc0d | 888 | check_multiple_madt(); |
1a1c130a RW |
889 | } |
890 | ||
891 | int __init acpi_table_init(void) | |
892 | { | |
893 | int ret; | |
894 | ||
895 | ret = acpi_locate_initial_tables(); | |
896 | if (ret) | |
897 | return ret; | |
898 | ||
899 | acpi_table_init_complete(); | |
900 | ||
a1fdcc0d LB |
901 | return 0; |
902 | } | |
903 | ||
904 | static int __init acpi_parse_apic_instance(char *str) | |
905 | { | |
f0df2d6b CG |
906 | if (!str) |
907 | return -EINVAL; | |
a1fdcc0d | 908 | |
3d915894 CJ |
909 | if (kstrtoint(str, 0, &acpi_apic_instance)) |
910 | return -EINVAL; | |
a1fdcc0d | 911 | |
730bf5eb | 912 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
a1fdcc0d | 913 | |
1da177e4 LT |
914 | return 0; |
915 | } | |
a1fdcc0d | 916 | early_param("acpi_apic_instance", acpi_parse_apic_instance); |
4fc0a7e8 LZ |
917 | |
918 | static int __init acpi_force_table_verification_setup(char *s) | |
919 | { | |
920 | acpi_verify_table_checksum = true; | |
921 | ||
922 | return 0; | |
923 | } | |
4fc0a7e8 | 924 | early_param("acpi_force_table_verification", acpi_force_table_verification_setup); |
b2ca5dae CIK |
925 | |
926 | static int __init acpi_force_32bit_fadt_addr(char *s) | |
927 | { | |
928 | pr_info("Forcing 32 Bit FADT addresses\n"); | |
929 | acpi_gbl_use32_bit_fadt_addresses = TRUE; | |
930 | ||
931 | return 0; | |
932 | } | |
b2ca5dae | 933 | early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr); |