1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 *
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 */
8 #define pr_fmt(fmt) "ACPI: " fmt
9
10 #include <linux/init.h>
11 #include <linux/acpi.h>
12 #include <linux/acpi_pmtmr.h>
13 #include <linux/efi.h>
14 #include <linux/cpumask.h>
15 #include <linux/export.h>
16 #include <linux/dmi.h>
17 #include <linux/irq.h>
18 #include <linux/slab.h>
19 #include <linux/memblock.h>
20 #include <linux/ioport.h>
21 #include <linux/pci.h>
22 #include <linux/efi-bgrt.h>
23 #include <linux/serial_core.h>
24 #include <linux/pgtable.h>
25
26 #include <asm/e820/api.h>
27 #include <asm/irqdomain.h>
28 #include <asm/pci_x86.h>
29 #include <asm/io_apic.h>
30 #include <asm/apic.h>
31 #include <asm/io.h>
32 #include <asm/mpspec.h>
33 #include <asm/smp.h>
34 #include <asm/i8259.h>
35 #include <asm/setup.h>
36
37 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
38 static int __initdata acpi_force = 0;
39 int acpi_disabled;
40 EXPORT_SYMBOL(acpi_disabled);
41
42 #ifdef CONFIG_X86_64
43 # include <asm/proto.h>
44 #endif /* X86 */
45
46 int acpi_noirq; /* skip ACPI IRQ initialization */
47 static int acpi_nobgrt; /* skip ACPI BGRT */
48 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
49 EXPORT_SYMBOL(acpi_pci_disabled);
50
51 int acpi_lapic;
52 int acpi_ioapic;
53 int acpi_strict;
54 int acpi_disable_cmcff;
55
56 /* ACPI SCI override configuration */
57 u8 acpi_sci_flags __initdata;
58 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
59 int acpi_skip_timer_override __initdata;
60 int acpi_use_timer_override __initdata;
61 int acpi_fix_pin2_polarity __initdata;
62
63 #ifdef CONFIG_X86_LOCAL_APIC
64 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
65 #endif
66
67 #ifdef CONFIG_X86_IO_APIC
68 /*
69 * Locks related to IOAPIC hotplug
70 * Hotplug side:
71 * ->device_hotplug_lock
72 * ->acpi_ioapic_lock
73 * ->ioapic_lock
74 * Interrupt mapping side:
75 * ->acpi_ioapic_lock
76 * ->ioapic_mutex
77 * ->ioapic_lock
78 */
79 static DEFINE_MUTEX(acpi_ioapic_lock);
80 #endif
81
82 /* --------------------------------------------------------------------------
83 Boot-time Configuration
84 -------------------------------------------------------------------------- */
85
86 /*
87 * The default interrupt routing model is PIC (8259). This gets
88 * overridden if IOAPICs are enumerated (below).
89 */
90 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
91
92
93 /*
94 * ISA irqs by default are the first 16 gsis but can be
95 * any gsi as specified by an interrupt source override.
96 */
97 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
98 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
99 };
100
101 /*
102 * This is just a simple wrapper around early_memremap(),
103 * with sanity checks for phys == 0 and size == 0.
104 */
__acpi_map_table(unsigned long phys,unsigned long size)105 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
106 {
107
108 if (!phys || !size)
109 return NULL;
110
111 return early_memremap(phys, size);
112 }
113
__acpi_unmap_table(void __iomem * map,unsigned long size)114 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
115 {
116 if (!map || !size)
117 return;
118
119 early_memunmap(map, size);
120 }
121
122 #ifdef CONFIG_X86_LOCAL_APIC
acpi_parse_madt(struct acpi_table_header * table)123 static int __init acpi_parse_madt(struct acpi_table_header *table)
124 {
125 struct acpi_table_madt *madt = NULL;
126
127 if (!boot_cpu_has(X86_FEATURE_APIC))
128 return -EINVAL;
129
130 madt = (struct acpi_table_madt *)table;
131 if (!madt) {
132 pr_warn("Unable to map MADT\n");
133 return -ENODEV;
134 }
135
136 if (madt->address) {
137 acpi_lapic_addr = (u64) madt->address;
138
139 pr_debug("Local APIC address 0x%08x\n", madt->address);
140 }
141
142 default_acpi_madt_oem_check(madt->header.oem_id,
143 madt->header.oem_table_id);
144
145 return 0;
146 }
147
148 /**
149 * acpi_register_lapic - register a local apic and generates a logic cpu number
150 * @id: local apic id to register
151 * @acpiid: ACPI id to register
152 * @enabled: this cpu is enabled or not
153 *
154 * Returns the logic cpu number which maps to the local apic
155 */
acpi_register_lapic(int id,u32 acpiid,u8 enabled)156 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
157 {
158 unsigned int ver = 0;
159 int cpu;
160
161 if (id >= MAX_LOCAL_APIC) {
162 pr_info("skipped apicid that is too big\n");
163 return -EINVAL;
164 }
165
166 if (!enabled) {
167 ++disabled_cpus;
168 return -EINVAL;
169 }
170
171 if (boot_cpu_physical_apicid != -1U)
172 ver = boot_cpu_apic_version;
173
174 cpu = generic_processor_info(id, ver);
175 if (cpu >= 0)
176 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
177
178 return cpu;
179 }
180
181 static int __init
acpi_parse_x2apic(union acpi_subtable_headers * header,const unsigned long end)182 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
183 {
184 struct acpi_madt_local_x2apic *processor = NULL;
185 #ifdef CONFIG_X86_X2APIC
186 u32 apic_id;
187 u8 enabled;
188 #endif
189
190 processor = (struct acpi_madt_local_x2apic *)header;
191
192 if (BAD_MADT_ENTRY(processor, end))
193 return -EINVAL;
194
195 acpi_table_print_madt_entry(&header->common);
196
197 #ifdef CONFIG_X86_X2APIC
198 apic_id = processor->local_apic_id;
199 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
200
201 /* Ignore invalid ID */
202 if (apic_id == 0xffffffff)
203 return 0;
204
205 /*
206 * We need to register disabled CPU as well to permit
207 * counting disabled CPUs. This allows us to size
208 * cpus_possible_map more accurately, to permit
209 * to not preallocating memory for all NR_CPUS
210 * when we use CPU hotplug.
211 */
212 if (!apic->apic_id_valid(apic_id)) {
213 if (enabled)
214 pr_warn("x2apic entry ignored\n");
215 return 0;
216 }
217
218 acpi_register_lapic(apic_id, processor->uid, enabled);
219 #else
220 pr_warn("x2apic entry ignored\n");
221 #endif
222
223 return 0;
224 }
225
226 static int __init
acpi_parse_lapic(union acpi_subtable_headers * header,const unsigned long end)227 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
228 {
229 struct acpi_madt_local_apic *processor = NULL;
230
231 processor = (struct acpi_madt_local_apic *)header;
232
233 if (BAD_MADT_ENTRY(processor, end))
234 return -EINVAL;
235
236 acpi_table_print_madt_entry(&header->common);
237
238 /* Ignore invalid ID */
239 if (processor->id == 0xff)
240 return 0;
241
242 /*
243 * We need to register disabled CPU as well to permit
244 * counting disabled CPUs. This allows us to size
245 * cpus_possible_map more accurately, to permit
246 * to not preallocating memory for all NR_CPUS
247 * when we use CPU hotplug.
248 */
249 acpi_register_lapic(processor->id, /* APIC ID */
250 processor->processor_id, /* ACPI ID */
251 processor->lapic_flags & ACPI_MADT_ENABLED);
252
253 return 0;
254 }
255
256 static int __init
acpi_parse_sapic(union acpi_subtable_headers * header,const unsigned long end)257 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
258 {
259 struct acpi_madt_local_sapic *processor = NULL;
260
261 processor = (struct acpi_madt_local_sapic *)header;
262
263 if (BAD_MADT_ENTRY(processor, end))
264 return -EINVAL;
265
266 acpi_table_print_madt_entry(&header->common);
267
268 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
269 processor->processor_id, /* ACPI ID */
270 processor->lapic_flags & ACPI_MADT_ENABLED);
271
272 return 0;
273 }
274
275 static int __init
acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,const unsigned long end)276 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
277 const unsigned long end)
278 {
279 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
280
281 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
282
283 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
284 return -EINVAL;
285
286 acpi_table_print_madt_entry(&header->common);
287
288 acpi_lapic_addr = lapic_addr_ovr->address;
289
290 return 0;
291 }
292
293 static int __init
acpi_parse_x2apic_nmi(union acpi_subtable_headers * header,const unsigned long end)294 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
295 const unsigned long end)
296 {
297 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
298
299 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
300
301 if (BAD_MADT_ENTRY(x2apic_nmi, end))
302 return -EINVAL;
303
304 acpi_table_print_madt_entry(&header->common);
305
306 if (x2apic_nmi->lint != 1)
307 pr_warn("NMI not connected to LINT 1!\n");
308
309 return 0;
310 }
311
312 static int __init
acpi_parse_lapic_nmi(union acpi_subtable_headers * header,const unsigned long end)313 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
314 {
315 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
316
317 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
318
319 if (BAD_MADT_ENTRY(lapic_nmi, end))
320 return -EINVAL;
321
322 acpi_table_print_madt_entry(&header->common);
323
324 if (lapic_nmi->lint != 1)
325 pr_warn("NMI not connected to LINT 1!\n");
326
327 return 0;
328 }
329
330 #endif /*CONFIG_X86_LOCAL_APIC */
331
332 #ifdef CONFIG_X86_IO_APIC
333 #define MP_ISA_BUS 0
334
335 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
336 u8 trigger, u32 gsi);
337
mp_override_legacy_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)338 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
339 u32 gsi)
340 {
341 /*
342 * Check bus_irq boundary.
343 */
344 if (bus_irq >= NR_IRQS_LEGACY) {
345 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
346 return;
347 }
348
349 /*
350 * TBD: This check is for faulty timer entries, where the override
351 * erroneously sets the trigger to level, resulting in a HUGE
352 * increase of timer interrupts!
353 */
354 if ((bus_irq == 0) && (trigger == 3))
355 trigger = 1;
356
357 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
358 return;
359 /*
360 * Reset default identity mapping if gsi is also an legacy IRQ,
361 * otherwise there will be more than one entry with the same GSI
362 * and acpi_isa_irq_to_gsi() may give wrong result.
363 */
364 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
365 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
366 isa_irq_to_gsi[bus_irq] = gsi;
367 }
368
mp_config_acpi_gsi(struct device * dev,u32 gsi,int trigger,int polarity)369 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
370 int polarity)
371 {
372 #ifdef CONFIG_X86_MPPARSE
373 struct mpc_intsrc mp_irq;
374 struct pci_dev *pdev;
375 unsigned char number;
376 unsigned int devfn;
377 int ioapic;
378 u8 pin;
379
380 if (!acpi_ioapic)
381 return 0;
382 if (!dev || !dev_is_pci(dev))
383 return 0;
384
385 pdev = to_pci_dev(dev);
386 number = pdev->bus->number;
387 devfn = pdev->devfn;
388 pin = pdev->pin;
389 /* print the entry should happen on mptable identically */
390 mp_irq.type = MP_INTSRC;
391 mp_irq.irqtype = mp_INT;
392 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
393 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
394 mp_irq.srcbus = number;
395 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
396 ioapic = mp_find_ioapic(gsi);
397 mp_irq.dstapic = mpc_ioapic_id(ioapic);
398 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
399
400 mp_save_irq(&mp_irq);
401 #endif
402 return 0;
403 }
404
mp_register_ioapic_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)405 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
406 u8 trigger, u32 gsi)
407 {
408 struct mpc_intsrc mp_irq;
409 int ioapic, pin;
410
411 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
412 ioapic = mp_find_ioapic(gsi);
413 if (ioapic < 0) {
414 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
415 return ioapic;
416 }
417
418 pin = mp_find_ioapic_pin(ioapic, gsi);
419
420 mp_irq.type = MP_INTSRC;
421 mp_irq.irqtype = mp_INT;
422 mp_irq.irqflag = (trigger << 2) | polarity;
423 mp_irq.srcbus = MP_ISA_BUS;
424 mp_irq.srcbusirq = bus_irq;
425 mp_irq.dstapic = mpc_ioapic_id(ioapic);
426 mp_irq.dstirq = pin;
427
428 mp_save_irq(&mp_irq);
429
430 return 0;
431 }
432
433 static int __init
acpi_parse_ioapic(union acpi_subtable_headers * header,const unsigned long end)434 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
435 {
436 struct acpi_madt_io_apic *ioapic = NULL;
437 struct ioapic_domain_cfg cfg = {
438 .type = IOAPIC_DOMAIN_DYNAMIC,
439 .ops = &mp_ioapic_irqdomain_ops,
440 };
441
442 ioapic = (struct acpi_madt_io_apic *)header;
443
444 if (BAD_MADT_ENTRY(ioapic, end))
445 return -EINVAL;
446
447 acpi_table_print_madt_entry(&header->common);
448
449 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
450 if (ioapic->global_irq_base < nr_legacy_irqs())
451 cfg.type = IOAPIC_DOMAIN_LEGACY;
452
453 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
454 &cfg);
455
456 return 0;
457 }
458
459 /*
460 * Parse Interrupt Source Override for the ACPI SCI
461 */
acpi_sci_ioapic_setup(u8 bus_irq,u16 polarity,u16 trigger,u32 gsi)462 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
463 {
464 if (trigger == 0) /* compatible SCI trigger is level */
465 trigger = 3;
466
467 if (polarity == 0) /* compatible SCI polarity is low */
468 polarity = 3;
469
470 /* Command-line over-ride via acpi_sci= */
471 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
472 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
473
474 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
475 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
476
477 if (bus_irq < NR_IRQS_LEGACY)
478 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
479 else
480 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
481
482 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
483
484 /*
485 * stash over-ride to indicate we've been here
486 * and for later update of acpi_gbl_FADT
487 */
488 acpi_sci_override_gsi = gsi;
489 return;
490 }
491
492 static int __init
acpi_parse_int_src_ovr(union acpi_subtable_headers * header,const unsigned long end)493 acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
494 const unsigned long end)
495 {
496 struct acpi_madt_interrupt_override *intsrc = NULL;
497
498 intsrc = (struct acpi_madt_interrupt_override *)header;
499
500 if (BAD_MADT_ENTRY(intsrc, end))
501 return -EINVAL;
502
503 acpi_table_print_madt_entry(&header->common);
504
505 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
506 acpi_sci_ioapic_setup(intsrc->source_irq,
507 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
508 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
509 intsrc->global_irq);
510 return 0;
511 }
512
513 if (intsrc->source_irq == 0) {
514 if (acpi_skip_timer_override) {
515 pr_warn("BIOS IRQ0 override ignored.\n");
516 return 0;
517 }
518
519 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
520 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
521 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
522 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
523 }
524 }
525
526 mp_override_legacy_irq(intsrc->source_irq,
527 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
528 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
529 intsrc->global_irq);
530
531 return 0;
532 }
533
534 static int __init
acpi_parse_nmi_src(union acpi_subtable_headers * header,const unsigned long end)535 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
536 {
537 struct acpi_madt_nmi_source *nmi_src = NULL;
538
539 nmi_src = (struct acpi_madt_nmi_source *)header;
540
541 if (BAD_MADT_ENTRY(nmi_src, end))
542 return -EINVAL;
543
544 acpi_table_print_madt_entry(&header->common);
545
546 /* TBD: Support nimsrc entries? */
547
548 return 0;
549 }
550
551 #endif /* CONFIG_X86_IO_APIC */
552
553 /*
554 * acpi_pic_sci_set_trigger()
555 *
556 * use ELCR to set PIC-mode trigger type for SCI
557 *
558 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
559 * it may require Edge Trigger -- use "acpi_sci=edge"
560 *
561 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers
562 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
563 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
564 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
565 */
566
acpi_pic_sci_set_trigger(unsigned int irq,u16 trigger)567 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
568 {
569 unsigned int mask = 1 << irq;
570 unsigned int old, new;
571
572 /* Real old ELCR mask */
573 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
574
575 /*
576 * If we use ACPI to set PCI IRQs, then we should clear ELCR
577 * since we will set it correctly as we enable the PCI irq
578 * routing.
579 */
580 new = acpi_noirq ? old : 0;
581
582 /*
583 * Update SCI information in the ELCR, it isn't in the PCI
584 * routing tables..
585 */
586 switch (trigger) {
587 case 1: /* Edge - clear */
588 new &= ~mask;
589 break;
590 case 3: /* Level - set */
591 new |= mask;
592 break;
593 }
594
595 if (old == new)
596 return;
597
598 pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
599 outb(new, PIC_ELCR1);
600 outb(new >> 8, PIC_ELCR2);
601 }
602
acpi_gsi_to_irq(u32 gsi,unsigned int * irqp)603 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
604 {
605 int rc, irq, trigger, polarity;
606
607 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
608 *irqp = gsi;
609 return 0;
610 }
611
612 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
613 if (rc)
614 return rc;
615
616 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
617 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
618 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
619 if (irq < 0)
620 return irq;
621
622 *irqp = irq;
623 return 0;
624 }
625 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
626
acpi_isa_irq_to_gsi(unsigned isa_irq,u32 * gsi)627 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
628 {
629 if (isa_irq < nr_legacy_irqs() &&
630 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
631 *gsi = isa_irq_to_gsi[isa_irq];
632 return 0;
633 }
634
635 return -1;
636 }
637
acpi_register_gsi_pic(struct device * dev,u32 gsi,int trigger,int polarity)638 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
639 int trigger, int polarity)
640 {
641 #ifdef CONFIG_PCI
642 /*
643 * Make sure all (legacy) PCI IRQs are set as level-triggered.
644 */
645 if (trigger == ACPI_LEVEL_SENSITIVE)
646 elcr_set_level_irq(gsi);
647 #endif
648
649 return gsi;
650 }
651
652 #ifdef CONFIG_X86_LOCAL_APIC
acpi_register_gsi_ioapic(struct device * dev,u32 gsi,int trigger,int polarity)653 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
654 int trigger, int polarity)
655 {
656 int irq = gsi;
657 #ifdef CONFIG_X86_IO_APIC
658 int node;
659 struct irq_alloc_info info;
660
661 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
662 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
663 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
664 ioapic_set_alloc_attr(&info, node, trigger, polarity);
665
666 mutex_lock(&acpi_ioapic_lock);
667 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
668 /* Don't set up the ACPI SCI because it's already set up */
669 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
670 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
671 mutex_unlock(&acpi_ioapic_lock);
672 #endif
673
674 return irq;
675 }
676
acpi_unregister_gsi_ioapic(u32 gsi)677 static void acpi_unregister_gsi_ioapic(u32 gsi)
678 {
679 #ifdef CONFIG_X86_IO_APIC
680 int irq;
681
682 mutex_lock(&acpi_ioapic_lock);
683 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
684 if (irq > 0)
685 mp_unmap_irq(irq);
686 mutex_unlock(&acpi_ioapic_lock);
687 #endif
688 }
689 #endif
690
691 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
692 int trigger, int polarity) = acpi_register_gsi_pic;
693 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
694
695 #ifdef CONFIG_ACPI_SLEEP
696 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
697 #else
698 int (*acpi_suspend_lowlevel)(void);
699 #endif
700
701 /*
702 * success: return IRQ number (>=0)
703 * failure: return < 0
704 */
acpi_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)705 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
706 {
707 return __acpi_register_gsi(dev, gsi, trigger, polarity);
708 }
709 EXPORT_SYMBOL_GPL(acpi_register_gsi);
710
acpi_unregister_gsi(u32 gsi)711 void acpi_unregister_gsi(u32 gsi)
712 {
713 if (__acpi_unregister_gsi)
714 __acpi_unregister_gsi(gsi);
715 }
716 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
717
718 #ifdef CONFIG_X86_LOCAL_APIC
acpi_set_irq_model_ioapic(void)719 static void __init acpi_set_irq_model_ioapic(void)
720 {
721 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
722 __acpi_register_gsi = acpi_register_gsi_ioapic;
723 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
724 acpi_ioapic = 1;
725 }
726 #endif
727
728 /*
729 * ACPI based hotplug support for CPU
730 */
731 #ifdef CONFIG_ACPI_HOTPLUG_CPU
732 #include <acpi/processor.h>
733
acpi_map_cpu2node(acpi_handle handle,int cpu,int physid)734 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
735 {
736 #ifdef CONFIG_ACPI_NUMA
737 int nid;
738
739 nid = acpi_get_node(handle);
740 if (nid != NUMA_NO_NODE) {
741 set_apicid_to_node(physid, nid);
742 numa_set_node(cpu, nid);
743 }
744 #endif
745 return 0;
746 }
747
acpi_map_cpu(acpi_handle handle,phys_cpuid_t physid,u32 acpi_id,int * pcpu)748 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
749 int *pcpu)
750 {
751 int cpu;
752
753 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
754 if (cpu < 0) {
755 pr_info("Unable to map lapic to logical cpu number\n");
756 return cpu;
757 }
758
759 acpi_processor_set_pdc(handle);
760 acpi_map_cpu2node(handle, cpu, physid);
761
762 *pcpu = cpu;
763 return 0;
764 }
765 EXPORT_SYMBOL(acpi_map_cpu);
766
acpi_unmap_cpu(int cpu)767 int acpi_unmap_cpu(int cpu)
768 {
769 #ifdef CONFIG_ACPI_NUMA
770 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
771 #endif
772
773 per_cpu(x86_cpu_to_apicid, cpu) = -1;
774 set_cpu_present(cpu, false);
775 num_processors--;
776
777 return (0);
778 }
779 EXPORT_SYMBOL(acpi_unmap_cpu);
780 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
781
acpi_register_ioapic(acpi_handle handle,u64 phys_addr,u32 gsi_base)782 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
783 {
784 int ret = -ENOSYS;
785 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
786 int ioapic_id;
787 u64 addr;
788 struct ioapic_domain_cfg cfg = {
789 .type = IOAPIC_DOMAIN_DYNAMIC,
790 .ops = &mp_ioapic_irqdomain_ops,
791 };
792
793 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
794 if (ioapic_id < 0) {
795 unsigned long long uid;
796 acpi_status status;
797
798 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
799 NULL, &uid);
800 if (ACPI_FAILURE(status)) {
801 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
802 return -EINVAL;
803 }
804 ioapic_id = (int)uid;
805 }
806
807 mutex_lock(&acpi_ioapic_lock);
808 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
809 mutex_unlock(&acpi_ioapic_lock);
810 #endif
811
812 return ret;
813 }
814 EXPORT_SYMBOL(acpi_register_ioapic);
815
acpi_unregister_ioapic(acpi_handle handle,u32 gsi_base)816 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
817 {
818 int ret = -ENOSYS;
819
820 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
821 mutex_lock(&acpi_ioapic_lock);
822 ret = mp_unregister_ioapic(gsi_base);
823 mutex_unlock(&acpi_ioapic_lock);
824 #endif
825
826 return ret;
827 }
828 EXPORT_SYMBOL(acpi_unregister_ioapic);
829
830 /**
831 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base
832 * has been registered
833 * @handle: ACPI handle of the IOAPIC device
834 * @gsi_base: GSI base associated with the IOAPIC
835 *
836 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
837 * with acpi_register_ioapic()/acpi_unregister_ioapic().
838 */
acpi_ioapic_registered(acpi_handle handle,u32 gsi_base)839 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
840 {
841 int ret = 0;
842
843 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
844 mutex_lock(&acpi_ioapic_lock);
845 ret = mp_ioapic_registered(gsi_base);
846 mutex_unlock(&acpi_ioapic_lock);
847 #endif
848
849 return ret;
850 }
851
acpi_parse_sbf(struct acpi_table_header * table)852 static int __init acpi_parse_sbf(struct acpi_table_header *table)
853 {
854 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
855
856 sbf_port = sb->cmos_index; /* Save CMOS port */
857
858 return 0;
859 }
860
861 #ifdef CONFIG_HPET_TIMER
862 #include <asm/hpet.h>
863
864 static struct resource *hpet_res __initdata;
865
acpi_parse_hpet(struct acpi_table_header * table)866 static int __init acpi_parse_hpet(struct acpi_table_header *table)
867 {
868 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
869
870 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
871 pr_warn("HPET timers must be located in memory.\n");
872 return -1;
873 }
874
875 hpet_address = hpet_tbl->address.address;
876 hpet_blockid = hpet_tbl->sequence;
877
878 /*
879 * Some broken BIOSes advertise HPET at 0x0. We really do not
880 * want to allocate a resource there.
881 */
882 if (!hpet_address) {
883 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address);
884 return 0;
885 }
886 #ifdef CONFIG_X86_64
887 /*
888 * Some even more broken BIOSes advertise HPET at
889 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
890 * some noise:
891 */
892 if (hpet_address == 0xfed0000000000000UL) {
893 if (!hpet_force_user) {
894 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n",
895 hpet_tbl->id);
896 hpet_address = 0;
897 return 0;
898 }
899 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n",
900 hpet_tbl->id);
901 hpet_address >>= 32;
902 }
903 #endif
904 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address);
905
906 /*
907 * Allocate and initialize the HPET firmware resource for adding into
908 * the resource tree during the lateinit timeframe.
909 */
910 #define HPET_RESOURCE_NAME_SIZE 9
911 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
912 SMP_CACHE_BYTES);
913 if (!hpet_res)
914 panic("%s: Failed to allocate %zu bytes\n", __func__,
915 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
916
917 hpet_res->name = (void *)&hpet_res[1];
918 hpet_res->flags = IORESOURCE_MEM;
919 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
920 hpet_tbl->sequence);
921
922 hpet_res->start = hpet_address;
923 hpet_res->end = hpet_address + (1 * 1024) - 1;
924
925 return 0;
926 }
927
928 /*
929 * hpet_insert_resource inserts the HPET resources used into the resource
930 * tree.
931 */
hpet_insert_resource(void)932 static __init int hpet_insert_resource(void)
933 {
934 if (!hpet_res)
935 return 1;
936
937 return insert_resource(&iomem_resource, hpet_res);
938 }
939
940 late_initcall(hpet_insert_resource);
941
942 #else
943 #define acpi_parse_hpet NULL
944 #endif
945
acpi_parse_fadt(struct acpi_table_header * table)946 static int __init acpi_parse_fadt(struct acpi_table_header *table)
947 {
948 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
949 pr_debug("no legacy devices present\n");
950 x86_platform.legacy.devices.pnpbios = 0;
951 }
952
953 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
954 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
955 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
956 pr_debug("i8042 controller is absent\n");
957 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
958 }
959
960 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
961 pr_debug("not registering RTC platform device\n");
962 x86_platform.legacy.rtc = 0;
963 }
964
965 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
966 pr_debug("probing for VGA not safe\n");
967 x86_platform.legacy.no_vga = 1;
968 }
969
970 #ifdef CONFIG_X86_PM_TIMER
971 /* detect the location of the ACPI PM Timer */
972 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
973 /* FADT rev. 2 */
974 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
975 ACPI_ADR_SPACE_SYSTEM_IO)
976 return 0;
977
978 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
979 /*
980 * "X" fields are optional extensions to the original V1.0
981 * fields, so we must selectively expand V1.0 fields if the
982 * corresponding X field is zero.
983 */
984 if (!pmtmr_ioport)
985 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
986 } else {
987 /* FADT rev. 1 */
988 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
989 }
990 if (pmtmr_ioport)
991 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport);
992 #endif
993 return 0;
994 }
995
996 #ifdef CONFIG_X86_LOCAL_APIC
997 /*
998 * Parse LAPIC entries in MADT
999 * returns 0 on success, < 0 on error
1000 */
1001
early_acpi_parse_madt_lapic_addr_ovr(void)1002 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1003 {
1004 int count;
1005
1006 if (!boot_cpu_has(X86_FEATURE_APIC))
1007 return -ENODEV;
1008
1009 /*
1010 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1011 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1012 */
1013
1014 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1015 acpi_parse_lapic_addr_ovr, 0);
1016 if (count < 0) {
1017 pr_err("Error parsing LAPIC address override entry\n");
1018 return count;
1019 }
1020
1021 register_lapic_address(acpi_lapic_addr);
1022
1023 return count;
1024 }
1025
acpi_parse_madt_lapic_entries(void)1026 static int __init acpi_parse_madt_lapic_entries(void)
1027 {
1028 int count;
1029 int x2count = 0;
1030 int ret;
1031 struct acpi_subtable_proc madt_proc[2];
1032
1033 if (!boot_cpu_has(X86_FEATURE_APIC))
1034 return -ENODEV;
1035
1036 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1037 acpi_parse_sapic, MAX_LOCAL_APIC);
1038
1039 if (!count) {
1040 memset(madt_proc, 0, sizeof(madt_proc));
1041 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1042 madt_proc[0].handler = acpi_parse_lapic;
1043 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1044 madt_proc[1].handler = acpi_parse_x2apic;
1045 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1046 sizeof(struct acpi_table_madt),
1047 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1048 if (ret < 0) {
1049 pr_err("Error parsing LAPIC/X2APIC entries\n");
1050 return ret;
1051 }
1052
1053 count = madt_proc[0].count;
1054 x2count = madt_proc[1].count;
1055 }
1056 if (!count && !x2count) {
1057 pr_err("No LAPIC entries present\n");
1058 /* TBD: Cleanup to allow fallback to MPS */
1059 return -ENODEV;
1060 } else if (count < 0 || x2count < 0) {
1061 pr_err("Error parsing LAPIC entry\n");
1062 /* TBD: Cleanup to allow fallback to MPS */
1063 return count;
1064 }
1065
1066 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1067 acpi_parse_x2apic_nmi, 0);
1068 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1069 acpi_parse_lapic_nmi, 0);
1070 if (count < 0 || x2count < 0) {
1071 pr_err("Error parsing LAPIC NMI entry\n");
1072 /* TBD: Cleanup to allow fallback to MPS */
1073 return count;
1074 }
1075 return 0;
1076 }
1077 #endif /* CONFIG_X86_LOCAL_APIC */
1078
1079 #ifdef CONFIG_X86_IO_APIC
mp_config_acpi_legacy_irqs(void)1080 static void __init mp_config_acpi_legacy_irqs(void)
1081 {
1082 int i;
1083 struct mpc_intsrc mp_irq;
1084
1085 #ifdef CONFIG_EISA
1086 /*
1087 * Fabricate the legacy ISA bus (bus #31).
1088 */
1089 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1090 #endif
1091 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1092 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1093
1094 /*
1095 * Use the default configuration for the IRQs 0-15. Unless
1096 * overridden by (MADT) interrupt source override entries.
1097 */
1098 for (i = 0; i < nr_legacy_irqs(); i++) {
1099 int ioapic, pin;
1100 unsigned int dstapic;
1101 int idx;
1102 u32 gsi;
1103
1104 /* Locate the gsi that irq i maps to. */
1105 if (acpi_isa_irq_to_gsi(i, &gsi))
1106 continue;
1107
1108 /*
1109 * Locate the IOAPIC that manages the ISA IRQ.
1110 */
1111 ioapic = mp_find_ioapic(gsi);
1112 if (ioapic < 0)
1113 continue;
1114 pin = mp_find_ioapic_pin(ioapic, gsi);
1115 dstapic = mpc_ioapic_id(ioapic);
1116
1117 for (idx = 0; idx < mp_irq_entries; idx++) {
1118 struct mpc_intsrc *irq = mp_irqs + idx;
1119
1120 /* Do we already have a mapping for this ISA IRQ? */
1121 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1122 break;
1123
1124 /* Do we already have a mapping for this IOAPIC pin */
1125 if (irq->dstapic == dstapic && irq->dstirq == pin)
1126 break;
1127 }
1128
1129 if (idx != mp_irq_entries) {
1130 pr_debug("ACPI: IRQ%d used by override.\n", i);
1131 continue; /* IRQ already used */
1132 }
1133
1134 mp_irq.type = MP_INTSRC;
1135 mp_irq.irqflag = 0; /* Conforming */
1136 mp_irq.srcbus = MP_ISA_BUS;
1137 mp_irq.dstapic = dstapic;
1138 mp_irq.irqtype = mp_INT;
1139 mp_irq.srcbusirq = i; /* Identity mapped */
1140 mp_irq.dstirq = pin;
1141
1142 mp_save_irq(&mp_irq);
1143 }
1144 }
1145
1146 /*
1147 * Parse IOAPIC related entries in MADT
1148 * returns 0 on success, < 0 on error
1149 */
acpi_parse_madt_ioapic_entries(void)1150 static int __init acpi_parse_madt_ioapic_entries(void)
1151 {
1152 int count;
1153
1154 /*
1155 * ACPI interpreter is required to complete interrupt setup,
1156 * so if it is off, don't enumerate the io-apics with ACPI.
1157 * If MPS is present, it will handle them,
1158 * otherwise the system will stay in PIC mode
1159 */
1160 if (acpi_disabled || acpi_noirq)
1161 return -ENODEV;
1162
1163 if (!boot_cpu_has(X86_FEATURE_APIC))
1164 return -ENODEV;
1165
1166 /*
1167 * if "noapic" boot option, don't look for IO-APICs
1168 */
1169 if (skip_ioapic_setup) {
1170 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
1171 return -ENODEV;
1172 }
1173
1174 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1175 MAX_IO_APICS);
1176 if (!count) {
1177 pr_err("No IOAPIC entries present\n");
1178 return -ENODEV;
1179 } else if (count < 0) {
1180 pr_err("Error parsing IOAPIC entry\n");
1181 return count;
1182 }
1183
1184 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1185 acpi_parse_int_src_ovr, nr_irqs);
1186 if (count < 0) {
1187 pr_err("Error parsing interrupt source overrides entry\n");
1188 /* TBD: Cleanup to allow fallback to MPS */
1189 return count;
1190 }
1191
1192 /*
1193 * If BIOS did not supply an INT_SRC_OVR for the SCI
1194 * pretend we got one so we can set the SCI flags.
1195 * But ignore setting up SCI on hardware reduced platforms.
1196 */
1197 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1198 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1199 acpi_gbl_FADT.sci_interrupt);
1200
1201 /* Fill in identity legacy mappings where no override */
1202 mp_config_acpi_legacy_irqs();
1203
1204 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1205 acpi_parse_nmi_src, nr_irqs);
1206 if (count < 0) {
1207 pr_err("Error parsing NMI SRC entry\n");
1208 /* TBD: Cleanup to allow fallback to MPS */
1209 return count;
1210 }
1211
1212 return 0;
1213 }
1214 #else
acpi_parse_madt_ioapic_entries(void)1215 static inline int acpi_parse_madt_ioapic_entries(void)
1216 {
1217 return -1;
1218 }
1219 #endif /* !CONFIG_X86_IO_APIC */
1220
early_acpi_process_madt(void)1221 static void __init early_acpi_process_madt(void)
1222 {
1223 #ifdef CONFIG_X86_LOCAL_APIC
1224 int error;
1225
1226 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1227
1228 /*
1229 * Parse MADT LAPIC entries
1230 */
1231 error = early_acpi_parse_madt_lapic_addr_ovr();
1232 if (!error) {
1233 acpi_lapic = 1;
1234 smp_found_config = 1;
1235 }
1236 if (error == -EINVAL) {
1237 /*
1238 * Dell Precision Workstation 410, 610 come here.
1239 */
1240 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1241 disable_acpi();
1242 }
1243 }
1244 #endif
1245 }
1246
acpi_process_madt(void)1247 static void __init acpi_process_madt(void)
1248 {
1249 #ifdef CONFIG_X86_LOCAL_APIC
1250 int error;
1251
1252 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1253
1254 /*
1255 * Parse MADT LAPIC entries
1256 */
1257 error = acpi_parse_madt_lapic_entries();
1258 if (!error) {
1259 acpi_lapic = 1;
1260
1261 /*
1262 * Parse MADT IO-APIC entries
1263 */
1264 mutex_lock(&acpi_ioapic_lock);
1265 error = acpi_parse_madt_ioapic_entries();
1266 mutex_unlock(&acpi_ioapic_lock);
1267 if (!error) {
1268 acpi_set_irq_model_ioapic();
1269
1270 smp_found_config = 1;
1271 }
1272 }
1273 if (error == -EINVAL) {
1274 /*
1275 * Dell Precision Workstation 410, 610 come here.
1276 */
1277 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1278 disable_acpi();
1279 }
1280 } else {
1281 /*
1282 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1283 * In the event an MPS table was found, forget it.
1284 * Boot with "acpi=off" to use MPS on such a system.
1285 */
1286 if (smp_found_config) {
1287 pr_warn("No APIC-table, disabling MPS\n");
1288 smp_found_config = 0;
1289 }
1290 }
1291
1292 /*
1293 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1294 * processors, where MPS only supports physical.
1295 */
1296 if (acpi_lapic && acpi_ioapic)
1297 pr_info("Using ACPI (MADT) for SMP configuration information\n");
1298 else if (acpi_lapic)
1299 pr_info("Using ACPI for processor (LAPIC) configuration information\n");
1300 #endif
1301 return;
1302 }
1303
disable_acpi_irq(const struct dmi_system_id * d)1304 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1305 {
1306 if (!acpi_force) {
1307 pr_notice("%s detected: force use of acpi=noirq\n", d->ident);
1308 acpi_noirq_set();
1309 }
1310 return 0;
1311 }
1312
disable_acpi_pci(const struct dmi_system_id * d)1313 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1314 {
1315 if (!acpi_force) {
1316 pr_notice("%s detected: force use of pci=noacpi\n", d->ident);
1317 acpi_disable_pci();
1318 }
1319 return 0;
1320 }
1321
dmi_disable_acpi(const struct dmi_system_id * d)1322 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1323 {
1324 if (!acpi_force) {
1325 pr_notice("%s detected: acpi off\n", d->ident);
1326 disable_acpi();
1327 } else {
1328 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n");
1329 }
1330 return 0;
1331 }
1332
1333 /*
1334 * Force ignoring BIOS IRQ0 override
1335 */
dmi_ignore_irq0_timer_override(const struct dmi_system_id * d)1336 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1337 {
1338 if (!acpi_skip_timer_override) {
1339 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1340 d->ident);
1341 acpi_skip_timer_override = 1;
1342 }
1343 return 0;
1344 }
1345
1346 /*
1347 * ACPI offers an alternative platform interface model that removes
1348 * ACPI hardware requirements for platforms that do not implement
1349 * the PC Architecture.
1350 *
1351 * We initialize the Hardware-reduced ACPI model here:
1352 */
acpi_generic_reduced_hw_init(void)1353 void __init acpi_generic_reduced_hw_init(void)
1354 {
1355 /*
1356 * Override x86_init functions and bypass legacy PIC in
1357 * hardware reduced ACPI mode.
1358 */
1359 x86_init.timers.timer_init = x86_init_noop;
1360 x86_init.irqs.pre_vector_init = x86_init_noop;
1361 legacy_pic = &null_legacy_pic;
1362 }
1363
acpi_reduced_hw_init(void)1364 static void __init acpi_reduced_hw_init(void)
1365 {
1366 if (acpi_gbl_reduced_hardware)
1367 x86_init.acpi.reduced_hw_early_init();
1368 }
1369
1370 /*
1371 * If your system is blacklisted here, but you find that acpi=force
1372 * works for you, please contact linux-acpi@vger.kernel.org
1373 */
1374 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1375 /*
1376 * Boxes that need ACPI disabled
1377 */
1378 {
1379 .callback = dmi_disable_acpi,
1380 .ident = "IBM Thinkpad",
1381 .matches = {
1382 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1383 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1384 },
1385 },
1386
1387 /*
1388 * Boxes that need ACPI PCI IRQ routing disabled
1389 */
1390 {
1391 .callback = disable_acpi_irq,
1392 .ident = "ASUS A7V",
1393 .matches = {
1394 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1395 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1396 /* newer BIOS, Revision 1011, does work */
1397 DMI_MATCH(DMI_BIOS_VERSION,
1398 "ASUS A7V ACPI BIOS Revision 1007"),
1399 },
1400 },
1401 {
1402 /*
1403 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1404 * for LPC bridge, which is needed for the PCI
1405 * interrupt links to work. DSDT fix is in bug 5966.
1406 * 2645, 2646 model numbers are shared with 600/600E/600X
1407 */
1408 .callback = disable_acpi_irq,
1409 .ident = "IBM Thinkpad 600 Series 2645",
1410 .matches = {
1411 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1412 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1413 },
1414 },
1415 {
1416 .callback = disable_acpi_irq,
1417 .ident = "IBM Thinkpad 600 Series 2646",
1418 .matches = {
1419 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1420 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1421 },
1422 },
1423 /*
1424 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1425 */
1426 { /* _BBN 0 bug */
1427 .callback = disable_acpi_pci,
1428 .ident = "ASUS PR-DLS",
1429 .matches = {
1430 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1431 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1432 DMI_MATCH(DMI_BIOS_VERSION,
1433 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1434 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1435 },
1436 },
1437 {
1438 .callback = disable_acpi_pci,
1439 .ident = "Acer TravelMate 36x Laptop",
1440 .matches = {
1441 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1442 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1443 },
1444 },
1445 {}
1446 };
1447
1448 /* second table for DMI checks that should run after early-quirks */
1449 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1450 /*
1451 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1452 * which includes some code which overrides all temperature
1453 * trip points to 16C if the INTIN2 input of the I/O APIC
1454 * is enabled. This input is incorrectly designated the
1455 * ISA IRQ 0 via an interrupt source override even though
1456 * it is wired to the output of the master 8259A and INTIN0
1457 * is not connected at all. Force ignoring BIOS IRQ0
1458 * override in that cases.
1459 */
1460 {
1461 .callback = dmi_ignore_irq0_timer_override,
1462 .ident = "HP nx6115 laptop",
1463 .matches = {
1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1466 },
1467 },
1468 {
1469 .callback = dmi_ignore_irq0_timer_override,
1470 .ident = "HP NX6125 laptop",
1471 .matches = {
1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1474 },
1475 },
1476 {
1477 .callback = dmi_ignore_irq0_timer_override,
1478 .ident = "HP NX6325 laptop",
1479 .matches = {
1480 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1481 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1482 },
1483 },
1484 {
1485 .callback = dmi_ignore_irq0_timer_override,
1486 .ident = "HP 6715b laptop",
1487 .matches = {
1488 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1489 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1490 },
1491 },
1492 {
1493 .callback = dmi_ignore_irq0_timer_override,
1494 .ident = "FUJITSU SIEMENS",
1495 .matches = {
1496 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1497 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1498 },
1499 },
1500 {}
1501 };
1502
1503 /*
1504 * acpi_boot_table_init() and acpi_boot_init()
1505 * called from setup_arch(), always.
1506 * 1. checksums all tables
1507 * 2. enumerates lapics
1508 * 3. enumerates io-apics
1509 *
1510 * acpi_table_init() is separate to allow reading SRAT without
1511 * other side effects.
1512 *
1513 * side effects of acpi_boot_init:
1514 * acpi_lapic = 1 if LAPIC found
1515 * acpi_ioapic = 1 if IOAPIC found
1516 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1517 * if acpi_blacklisted() acpi_disabled = 1;
1518 * acpi_irq_model=...
1519 * ...
1520 */
1521
acpi_boot_table_init(void)1522 void __init acpi_boot_table_init(void)
1523 {
1524 dmi_check_system(acpi_dmi_table);
1525
1526 /*
1527 * If acpi_disabled, bail out
1528 */
1529 if (acpi_disabled)
1530 return;
1531
1532 /*
1533 * Initialize the ACPI boot-time table parser.
1534 */
1535 if (acpi_locate_initial_tables())
1536 disable_acpi();
1537 else
1538 acpi_reserve_initial_tables();
1539 }
1540
early_acpi_boot_init(void)1541 int __init early_acpi_boot_init(void)
1542 {
1543 if (acpi_disabled)
1544 return 1;
1545
1546 acpi_table_init_complete();
1547
1548 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1549
1550 /*
1551 * blacklist may disable ACPI entirely
1552 */
1553 if (acpi_blacklisted()) {
1554 if (acpi_force) {
1555 pr_warn("acpi=force override\n");
1556 } else {
1557 pr_warn("Disabling ACPI support\n");
1558 disable_acpi();
1559 return 1;
1560 }
1561 }
1562
1563 /*
1564 * Process the Multiple APIC Description Table (MADT), if present
1565 */
1566 early_acpi_process_madt();
1567
1568 /*
1569 * Hardware-reduced ACPI mode initialization:
1570 */
1571 acpi_reduced_hw_init();
1572
1573 return 0;
1574 }
1575
acpi_boot_init(void)1576 int __init acpi_boot_init(void)
1577 {
1578 /* those are executed after early-quirks are executed */
1579 dmi_check_system(acpi_dmi_table_late);
1580
1581 /*
1582 * If acpi_disabled, bail out
1583 */
1584 if (acpi_disabled)
1585 return 1;
1586
1587 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1588
1589 /*
1590 * set sci_int and PM timer address
1591 */
1592 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1593
1594 /*
1595 * Process the Multiple APIC Description Table (MADT), if present
1596 */
1597 acpi_process_madt();
1598
1599 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1600 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1601 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1602
1603 if (!acpi_noirq)
1604 x86_init.pci.init = pci_acpi_init;
1605
1606 /* Do not enable ACPI SPCR console by default */
1607 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1608 return 0;
1609 }
1610
parse_acpi(char * arg)1611 static int __init parse_acpi(char *arg)
1612 {
1613 if (!arg)
1614 return -EINVAL;
1615
1616 /* "acpi=off" disables both ACPI table parsing and interpreter */
1617 if (strcmp(arg, "off") == 0) {
1618 disable_acpi();
1619 }
1620 /* acpi=force to over-ride black-list */
1621 else if (strcmp(arg, "force") == 0) {
1622 acpi_force = 1;
1623 acpi_disabled = 0;
1624 }
1625 /* acpi=strict disables out-of-spec workarounds */
1626 else if (strcmp(arg, "strict") == 0) {
1627 acpi_strict = 1;
1628 }
1629 /* acpi=rsdt use RSDT instead of XSDT */
1630 else if (strcmp(arg, "rsdt") == 0) {
1631 acpi_gbl_do_not_use_xsdt = TRUE;
1632 }
1633 /* "acpi=noirq" disables ACPI interrupt routing */
1634 else if (strcmp(arg, "noirq") == 0) {
1635 acpi_noirq_set();
1636 }
1637 /* "acpi=copy_dsdt" copies DSDT */
1638 else if (strcmp(arg, "copy_dsdt") == 0) {
1639 acpi_gbl_copy_dsdt_locally = 1;
1640 }
1641 /* "acpi=nocmcff" disables FF mode for corrected errors */
1642 else if (strcmp(arg, "nocmcff") == 0) {
1643 acpi_disable_cmcff = 1;
1644 } else {
1645 /* Core will printk when we return error. */
1646 return -EINVAL;
1647 }
1648 return 0;
1649 }
1650 early_param("acpi", parse_acpi);
1651
parse_acpi_bgrt(char * arg)1652 static int __init parse_acpi_bgrt(char *arg)
1653 {
1654 acpi_nobgrt = true;
1655 return 0;
1656 }
1657 early_param("bgrt_disable", parse_acpi_bgrt);
1658
1659 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
parse_pci(char * arg)1660 static int __init parse_pci(char *arg)
1661 {
1662 if (arg && strcmp(arg, "noacpi") == 0)
1663 acpi_disable_pci();
1664 return 0;
1665 }
1666 early_param("pci", parse_pci);
1667
acpi_mps_check(void)1668 int __init acpi_mps_check(void)
1669 {
1670 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1671 /* mptable code is not built-in*/
1672 if (acpi_disabled || acpi_noirq) {
1673 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
1674 return 1;
1675 }
1676 #endif
1677 return 0;
1678 }
1679
1680 #ifdef CONFIG_X86_IO_APIC
parse_acpi_skip_timer_override(char * arg)1681 static int __init parse_acpi_skip_timer_override(char *arg)
1682 {
1683 acpi_skip_timer_override = 1;
1684 return 0;
1685 }
1686 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1687
parse_acpi_use_timer_override(char * arg)1688 static int __init parse_acpi_use_timer_override(char *arg)
1689 {
1690 acpi_use_timer_override = 1;
1691 return 0;
1692 }
1693 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1694 #endif /* CONFIG_X86_IO_APIC */
1695
setup_acpi_sci(char * s)1696 static int __init setup_acpi_sci(char *s)
1697 {
1698 if (!s)
1699 return -EINVAL;
1700 if (!strcmp(s, "edge"))
1701 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1702 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1703 else if (!strcmp(s, "level"))
1704 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1705 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1706 else if (!strcmp(s, "high"))
1707 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1708 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1709 else if (!strcmp(s, "low"))
1710 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1711 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1712 else
1713 return -EINVAL;
1714 return 0;
1715 }
1716 early_param("acpi_sci", setup_acpi_sci);
1717
__acpi_acquire_global_lock(unsigned int * lock)1718 int __acpi_acquire_global_lock(unsigned int *lock)
1719 {
1720 unsigned int old, new, val;
1721 do {
1722 old = *lock;
1723 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1724 val = cmpxchg(lock, old, new);
1725 } while (unlikely (val != old));
1726 return ((new & 0x3) < 3) ? -1 : 0;
1727 }
1728
__acpi_release_global_lock(unsigned int * lock)1729 int __acpi_release_global_lock(unsigned int *lock)
1730 {
1731 unsigned int old, new, val;
1732 do {
1733 old = *lock;
1734 new = old & ~0x3;
1735 val = cmpxchg(lock, old, new);
1736 } while (unlikely (val != old));
1737 return old & 0x1;
1738 }
1739
arch_reserve_mem_area(acpi_physical_address addr,size_t size)1740 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1741 {
1742 e820__range_add(addr, size, E820_TYPE_ACPI);
1743 e820__update_table_print();
1744 }
1745
x86_default_set_root_pointer(u64 addr)1746 void x86_default_set_root_pointer(u64 addr)
1747 {
1748 boot_params.acpi_rsdp_addr = addr;
1749 }
1750
x86_default_get_root_pointer(void)1751 u64 x86_default_get_root_pointer(void)
1752 {
1753 return boot_params.acpi_rsdp_addr;
1754 }
1755
