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 <xen/xen.h>
27
28#include <asm/e820/api.h>
29#include <asm/irqdomain.h>
30#include <asm/pci_x86.h>
31#include <asm/io_apic.h>
32#include <asm/apic.h>
33#include <asm/io.h>
34#include <asm/mpspec.h>
35#include <asm/smp.h>
36#include <asm/i8259.h>
37#include <asm/setup.h>
38
39#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
40static int __initdata acpi_force = 0;
41int acpi_disabled;
42EXPORT_SYMBOL(acpi_disabled);
43
44#ifdef CONFIG_X86_64
45# include <asm/proto.h>
46#endif /* X86 */
47
48int acpi_noirq; /* skip ACPI IRQ initialization */
49static int acpi_nobgrt; /* skip ACPI BGRT */
50int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
51EXPORT_SYMBOL(acpi_pci_disabled);
52
53int acpi_lapic;
54int acpi_ioapic;
55int acpi_strict;
56int acpi_disable_cmcff;
57bool acpi_int_src_ovr[NR_IRQS_LEGACY];
58
59/* ACPI SCI override configuration */
60u8 acpi_sci_flags __initdata;
61u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
62int acpi_skip_timer_override __initdata;
63int acpi_use_timer_override __initdata;
64int acpi_fix_pin2_polarity __initdata;
65
66#ifdef CONFIG_X86_LOCAL_APIC
67static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
68static bool has_lapic_cpus __initdata;
69static bool acpi_support_online_capable;
70#endif
71
72#ifdef CONFIG_X86_IO_APIC
73/*
74 * Locks related to IOAPIC hotplug
75 * Hotplug side:
76 * ->device_hotplug_lock
77 * ->acpi_ioapic_lock
78 * ->ioapic_lock
79 * Interrupt mapping side:
80 * ->acpi_ioapic_lock
81 * ->ioapic_mutex
82 * ->ioapic_lock
83 */
84static DEFINE_MUTEX(acpi_ioapic_lock);
85#endif
86
87/* --------------------------------------------------------------------------
88 Boot-time Configuration
89 -------------------------------------------------------------------------- */
90
91/*
92 * The default interrupt routing model is PIC (8259). This gets
93 * overridden if IOAPICs are enumerated (below).
94 */
95enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
96
97
98/*
99 * ISA irqs by default are the first 16 gsis but can be
100 * any gsi as specified by an interrupt source override.
101 */
102static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
103 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
104};
105
106/*
107 * This is just a simple wrapper around early_memremap(),
108 * with sanity checks for phys == 0 and size == 0.
109 */
110void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
111{
112
113 if (!phys || !size)
114 return NULL;
115
116 return early_memremap(phys_addr: phys, size);
117}
118
119void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
120{
121 if (!map || !size)
122 return;
123
124 early_memunmap(addr: map, size);
125}
126
127#ifdef CONFIG_X86_LOCAL_APIC
128static int __init acpi_parse_madt(struct acpi_table_header *table)
129{
130 struct acpi_table_madt *madt = NULL;
131
132 if (!boot_cpu_has(X86_FEATURE_APIC))
133 return -EINVAL;
134
135 madt = (struct acpi_table_madt *)table;
136 if (!madt) {
137 pr_warn("Unable to map MADT\n");
138 return -ENODEV;
139 }
140
141 if (madt->address) {
142 acpi_lapic_addr = (u64) madt->address;
143
144 pr_debug("Local APIC address 0x%08x\n", madt->address);
145 }
146
147 if (madt->flags & ACPI_MADT_PCAT_COMPAT)
148 legacy_pic_pcat_compat();
149
150 /* ACPI 6.3 and newer support the online capable bit. */
151 if (acpi_gbl_FADT.header.revision > 6 ||
152 (acpi_gbl_FADT.header.revision == 6 &&
153 acpi_gbl_FADT.minor_revision >= 3))
154 acpi_support_online_capable = true;
155
156 default_acpi_madt_oem_check(madt->header.oem_id,
157 madt->header.oem_table_id);
158
159 return 0;
160}
161
162static bool __init acpi_is_processor_usable(u32 lapic_flags)
163{
164 if (lapic_flags & ACPI_MADT_ENABLED)
165 return true;
166
167 if (!acpi_support_online_capable ||
168 (lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
169 return true;
170
171 return false;
172}
173
174static int __init
175acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
176{
177 struct acpi_madt_local_x2apic *processor = NULL;
178#ifdef CONFIG_X86_X2APIC
179 u32 apic_id;
180 u8 enabled;
181#endif
182
183 processor = (struct acpi_madt_local_x2apic *)header;
184
185 if (BAD_MADT_ENTRY(processor, end))
186 return -EINVAL;
187
188 acpi_table_print_madt_entry(madt: &header->common);
189
190#ifdef CONFIG_X86_X2APIC
191 apic_id = processor->local_apic_id;
192 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
193
194 /* Ignore invalid ID */
195 if (apic_id == 0xffffffff)
196 return 0;
197
198 /* don't register processors that cannot be onlined */
199 if (!acpi_is_processor_usable(lapic_flags: processor->lapic_flags))
200 return 0;
201
202 /*
203 * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure
204 * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID
205 * in x2APIC must be equal or greater than 0xff.
206 */
207 if (has_lapic_cpus && apic_id < 0xff)
208 return 0;
209
210 /*
211 * We need to register disabled CPU as well to permit
212 * counting disabled CPUs. This allows us to size
213 * cpus_possible_map more accurately, to permit
214 * to not preallocating memory for all NR_CPUS
215 * when we use CPU hotplug.
216 */
217 if (!apic_id_valid(apic_id)) {
218 if (enabled)
219 pr_warn("x2apic entry ignored\n");
220 return 0;
221 }
222
223 topology_register_apic(apic_id, acpi_id: processor->uid, present: enabled);
224#else
225 pr_warn("x2apic entry ignored\n");
226#endif
227
228 return 0;
229}
230
231static int __init
232acpi_check_lapic(union acpi_subtable_headers *header, const unsigned long end)
233{
234 struct acpi_madt_local_apic *processor = NULL;
235
236 processor = (struct acpi_madt_local_apic *)header;
237
238 if (BAD_MADT_ENTRY(processor, end))
239 return -EINVAL;
240
241 /* Ignore invalid ID */
242 if (processor->id == 0xff)
243 return 0;
244
245 /* Ignore processors that can not be onlined */
246 if (!acpi_is_processor_usable(lapic_flags: processor->lapic_flags))
247 return 0;
248
249 has_lapic_cpus = true;
250 return 0;
251}
252
253static int __init
254acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
255{
256 struct acpi_madt_local_apic *processor = NULL;
257
258 processor = (struct acpi_madt_local_apic *)header;
259
260 if (BAD_MADT_ENTRY(processor, end))
261 return -EINVAL;
262
263 acpi_table_print_madt_entry(madt: &header->common);
264
265 /* Ignore invalid ID */
266 if (processor->id == 0xff)
267 return 0;
268
269 /* don't register processors that can not be onlined */
270 if (!acpi_is_processor_usable(lapic_flags: processor->lapic_flags))
271 return 0;
272
273 /*
274 * We need to register disabled CPU as well to permit
275 * counting disabled CPUs. This allows us to size
276 * cpus_possible_map more accurately, to permit
277 * to not preallocating memory for all NR_CPUS
278 * when we use CPU hotplug.
279 */
280 topology_register_apic(apic_id: processor->id, /* APIC ID */
281 acpi_id: processor->processor_id, /* ACPI ID */
282 present: processor->lapic_flags & ACPI_MADT_ENABLED);
283
284 return 0;
285}
286
287static int __init
288acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
289{
290 struct acpi_madt_local_sapic *processor = NULL;
291
292 processor = (struct acpi_madt_local_sapic *)header;
293
294 if (BAD_MADT_ENTRY(processor, end))
295 return -EINVAL;
296
297 acpi_table_print_madt_entry(madt: &header->common);
298
299 topology_register_apic(apic_id: (processor->id << 8) | processor->eid,/* APIC ID */
300 acpi_id: processor->processor_id, /* ACPI ID */
301 present: processor->lapic_flags & ACPI_MADT_ENABLED);
302
303 return 0;
304}
305
306static int __init
307acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
308 const unsigned long end)
309{
310 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
311
312 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
313
314 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
315 return -EINVAL;
316
317 acpi_table_print_madt_entry(madt: &header->common);
318
319 acpi_lapic_addr = lapic_addr_ovr->address;
320
321 return 0;
322}
323
324static int __init
325acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
326 const unsigned long end)
327{
328 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
329
330 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
331
332 if (BAD_MADT_ENTRY(x2apic_nmi, end))
333 return -EINVAL;
334
335 acpi_table_print_madt_entry(madt: &header->common);
336
337 if (x2apic_nmi->lint != 1)
338 pr_warn("NMI not connected to LINT 1!\n");
339
340 return 0;
341}
342
343static int __init
344acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
345{
346 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
347
348 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
349
350 if (BAD_MADT_ENTRY(lapic_nmi, end))
351 return -EINVAL;
352
353 acpi_table_print_madt_entry(madt: &header->common);
354
355 if (lapic_nmi->lint != 1)
356 pr_warn("NMI not connected to LINT 1!\n");
357
358 return 0;
359}
360#endif /* CONFIG_X86_LOCAL_APIC */
361
362#ifdef CONFIG_X86_IO_APIC
363#define MP_ISA_BUS 0
364
365static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
366 u8 trigger, u32 gsi);
367
368static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
369 u32 gsi)
370{
371 /*
372 * Check bus_irq boundary.
373 */
374 if (bus_irq >= NR_IRQS_LEGACY) {
375 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
376 return;
377 }
378
379 /*
380 * TBD: This check is for faulty timer entries, where the override
381 * erroneously sets the trigger to level, resulting in a HUGE
382 * increase of timer interrupts!
383 */
384 if ((bus_irq == 0) && (trigger == 3))
385 trigger = 1;
386
387 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
388 return;
389 /*
390 * Reset default identity mapping if gsi is also an legacy IRQ,
391 * otherwise there will be more than one entry with the same GSI
392 * and acpi_isa_irq_to_gsi() may give wrong result.
393 */
394 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
395 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
396 isa_irq_to_gsi[bus_irq] = gsi;
397}
398
399static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
400 int polarity)
401{
402#ifdef CONFIG_X86_MPPARSE
403 struct mpc_intsrc mp_irq;
404 struct pci_dev *pdev;
405 unsigned char number;
406 unsigned int devfn;
407 int ioapic;
408 u8 pin;
409
410 if (!acpi_ioapic)
411 return;
412 if (!dev || !dev_is_pci(dev))
413 return;
414
415 pdev = to_pci_dev(dev);
416 number = pdev->bus->number;
417 devfn = pdev->devfn;
418 pin = pdev->pin;
419 /* print the entry should happen on mptable identically */
420 mp_irq.type = MP_INTSRC;
421 mp_irq.irqtype = mp_INT;
422 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
423 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
424 mp_irq.srcbus = number;
425 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
426 ioapic = mp_find_ioapic(gsi);
427 mp_irq.dstapic = mpc_ioapic_id(ioapic);
428 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
429
430 mp_save_irq(m: &mp_irq);
431#endif
432}
433
434static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
435 u8 trigger, u32 gsi)
436{
437 struct mpc_intsrc mp_irq;
438 int ioapic, pin;
439
440 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
441 ioapic = mp_find_ioapic(gsi);
442 if (ioapic < 0) {
443 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
444 return ioapic;
445 }
446
447 pin = mp_find_ioapic_pin(ioapic, gsi);
448
449 mp_irq.type = MP_INTSRC;
450 mp_irq.irqtype = mp_INT;
451 mp_irq.irqflag = (trigger << 2) | polarity;
452 mp_irq.srcbus = MP_ISA_BUS;
453 mp_irq.srcbusirq = bus_irq;
454 mp_irq.dstapic = mpc_ioapic_id(ioapic);
455 mp_irq.dstirq = pin;
456
457 mp_save_irq(m: &mp_irq);
458
459 return 0;
460}
461
462static int __init
463acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
464{
465 struct acpi_madt_io_apic *ioapic = NULL;
466 struct ioapic_domain_cfg cfg = {
467 .type = IOAPIC_DOMAIN_DYNAMIC,
468 .ops = &mp_ioapic_irqdomain_ops,
469 };
470
471 ioapic = (struct acpi_madt_io_apic *)header;
472
473 if (BAD_MADT_ENTRY(ioapic, end))
474 return -EINVAL;
475
476 acpi_table_print_madt_entry(madt: &header->common);
477
478 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
479 if (ioapic->global_irq_base < nr_legacy_irqs())
480 cfg.type = IOAPIC_DOMAIN_LEGACY;
481
482 mp_register_ioapic(id: ioapic->id, address: ioapic->address, gsi_base: ioapic->global_irq_base,
483 cfg: &cfg);
484
485 return 0;
486}
487
488/*
489 * Parse Interrupt Source Override for the ACPI SCI
490 */
491static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
492{
493 if (trigger == 0) /* compatible SCI trigger is level */
494 trigger = 3;
495
496 if (polarity == 0) /* compatible SCI polarity is low */
497 polarity = 3;
498
499 /* Command-line over-ride via acpi_sci= */
500 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
501 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
502
503 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
504 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
505
506 if (bus_irq < NR_IRQS_LEGACY)
507 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
508 else
509 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
510
511 acpi_penalize_sci_irq(irq: bus_irq, trigger, polarity);
512
513 /*
514 * stash over-ride to indicate we've been here
515 * and for later update of acpi_gbl_FADT
516 */
517 acpi_sci_override_gsi = gsi;
518 return;
519}
520
521static int __init
522acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
523 const unsigned long end)
524{
525 struct acpi_madt_interrupt_override *intsrc = NULL;
526
527 intsrc = (struct acpi_madt_interrupt_override *)header;
528
529 if (BAD_MADT_ENTRY(intsrc, end))
530 return -EINVAL;
531
532 acpi_table_print_madt_entry(madt: &header->common);
533
534 if (intsrc->source_irq < NR_IRQS_LEGACY)
535 acpi_int_src_ovr[intsrc->source_irq] = true;
536
537 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
538 acpi_sci_ioapic_setup(bus_irq: intsrc->source_irq,
539 polarity: intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
540 trigger: (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
541 gsi: intsrc->global_irq);
542 return 0;
543 }
544
545 if (intsrc->source_irq == 0) {
546 if (acpi_skip_timer_override) {
547 pr_warn("BIOS IRQ0 override ignored.\n");
548 return 0;
549 }
550
551 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
552 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
553 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
554 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
555 }
556 }
557
558 mp_override_legacy_irq(bus_irq: intsrc->source_irq,
559 polarity: intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
560 trigger: (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
561 gsi: intsrc->global_irq);
562
563 return 0;
564}
565
566static int __init
567acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
568{
569 struct acpi_madt_nmi_source *nmi_src = NULL;
570
571 nmi_src = (struct acpi_madt_nmi_source *)header;
572
573 if (BAD_MADT_ENTRY(nmi_src, end))
574 return -EINVAL;
575
576 acpi_table_print_madt_entry(madt: &header->common);
577
578 /* TBD: Support nimsrc entries? */
579
580 return 0;
581}
582
583#endif /* CONFIG_X86_IO_APIC */
584
585/*
586 * acpi_pic_sci_set_trigger()
587 *
588 * use ELCR to set PIC-mode trigger type for SCI
589 *
590 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
591 * it may require Edge Trigger -- use "acpi_sci=edge"
592 *
593 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers
594 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
595 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
596 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
597 */
598
599void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
600{
601 unsigned int mask = 1 << irq;
602 unsigned int old, new;
603
604 /* Real old ELCR mask */
605 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
606
607 /*
608 * If we use ACPI to set PCI IRQs, then we should clear ELCR
609 * since we will set it correctly as we enable the PCI irq
610 * routing.
611 */
612 new = acpi_noirq ? old : 0;
613
614 /*
615 * Update SCI information in the ELCR, it isn't in the PCI
616 * routing tables..
617 */
618 switch (trigger) {
619 case 1: /* Edge - clear */
620 new &= ~mask;
621 break;
622 case 3: /* Level - set */
623 new |= mask;
624 break;
625 }
626
627 if (old == new)
628 return;
629
630 pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
631 outb(value: new, PIC_ELCR1);
632 outb(value: new >> 8, PIC_ELCR2);
633}
634
635int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
636{
637 int rc, irq, trigger, polarity;
638
639 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
640 *irqp = gsi;
641 return 0;
642 }
643
644 rc = acpi_get_override_irq(gsi, trigger: &trigger, polarity: &polarity);
645 if (rc)
646 return rc;
647
648 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
649 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
650 irq = acpi_register_gsi(NULL, gsi, triggering: trigger, polarity);
651 if (irq < 0)
652 return irq;
653
654 *irqp = irq;
655 return 0;
656}
657EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
658
659int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
660{
661 if (isa_irq < nr_legacy_irqs() &&
662 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
663 *gsi = isa_irq_to_gsi[isa_irq];
664 return 0;
665 }
666
667 return -1;
668}
669
670static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
671 int trigger, int polarity)
672{
673#ifdef CONFIG_PCI
674 /*
675 * Make sure all (legacy) PCI IRQs are set as level-triggered.
676 */
677 if (trigger == ACPI_LEVEL_SENSITIVE)
678 elcr_set_level_irq(irq: gsi);
679#endif
680
681 return gsi;
682}
683
684#ifdef CONFIG_X86_LOCAL_APIC
685static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
686 int trigger, int polarity)
687{
688 int irq = gsi;
689#ifdef CONFIG_X86_IO_APIC
690 int node;
691 struct irq_alloc_info info;
692
693 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
694 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
695 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
696 ioapic_set_alloc_attr(info: &info, node, trigger, polarity);
697
698 mutex_lock(lock: &acpi_ioapic_lock);
699 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, info: &info);
700 /* Don't set up the ACPI SCI because it's already set up */
701 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
702 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
703 mutex_unlock(lock: &acpi_ioapic_lock);
704#endif
705
706 return irq;
707}
708
709static void acpi_unregister_gsi_ioapic(u32 gsi)
710{
711#ifdef CONFIG_X86_IO_APIC
712 int irq;
713
714 mutex_lock(lock: &acpi_ioapic_lock);
715 irq = mp_map_gsi_to_irq(gsi, flags: 0, NULL);
716 if (irq > 0)
717 mp_unmap_irq(irq);
718 mutex_unlock(lock: &acpi_ioapic_lock);
719#endif
720}
721#endif
722
723int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
724 int trigger, int polarity) = acpi_register_gsi_pic;
725void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
726
727#ifdef CONFIG_ACPI_SLEEP
728int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
729#else
730int (*acpi_suspend_lowlevel)(void);
731#endif
732
733/*
734 * success: return IRQ number (>=0)
735 * failure: return < 0
736 */
737int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
738{
739 return __acpi_register_gsi(dev, gsi, trigger, polarity);
740}
741EXPORT_SYMBOL_GPL(acpi_register_gsi);
742
743void acpi_unregister_gsi(u32 gsi)
744{
745 if (__acpi_unregister_gsi)
746 __acpi_unregister_gsi(gsi);
747}
748EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
749
750#ifdef CONFIG_X86_LOCAL_APIC
751static void __init acpi_set_irq_model_ioapic(void)
752{
753 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
754 __acpi_register_gsi = acpi_register_gsi_ioapic;
755 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
756 acpi_ioapic = 1;
757}
758#endif
759
760/*
761 * ACPI based hotplug support for CPU
762 */
763#ifdef CONFIG_ACPI_HOTPLUG_CPU
764#include <acpi/processor.h>
765
766static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
767{
768#ifdef CONFIG_ACPI_NUMA
769 int nid;
770
771 nid = acpi_get_node(handle);
772 if (nid != NUMA_NO_NODE) {
773 set_apicid_to_node(apicid: physid, node: nid);
774 numa_set_node(cpu, node: nid);
775 }
776#endif
777 return 0;
778}
779
780int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu)
781{
782 int cpu = topology_hotplug_apic(apic_id: physid, acpi_id);
783
784 if (cpu < 0) {
785 pr_info("Unable to map lapic to logical cpu number\n");
786 return cpu;
787 }
788
789 acpi_processor_set_pdc(handle);
790 acpi_map_cpu2node(handle, cpu, physid);
791
792 *pcpu = cpu;
793 return 0;
794}
795EXPORT_SYMBOL(acpi_map_cpu);
796
797int acpi_unmap_cpu(int cpu)
798{
799#ifdef CONFIG_ACPI_NUMA
800 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
801#endif
802 topology_hotunplug_apic(cpu);
803 return 0;
804}
805EXPORT_SYMBOL(acpi_unmap_cpu);
806#endif /* CONFIG_ACPI_HOTPLUG_CPU */
807
808int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
809{
810 int ret = -ENOSYS;
811#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
812 int ioapic_id;
813 u64 addr;
814 struct ioapic_domain_cfg cfg = {
815 .type = IOAPIC_DOMAIN_DYNAMIC,
816 .ops = &mp_ioapic_irqdomain_ops,
817 };
818
819 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, phys_addr: &addr);
820 if (ioapic_id < 0) {
821 unsigned long long uid;
822 acpi_status status;
823
824 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
825 NULL, data: &uid);
826 if (ACPI_FAILURE(status)) {
827 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
828 return -EINVAL;
829 }
830 ioapic_id = (int)uid;
831 }
832
833 mutex_lock(lock: &acpi_ioapic_lock);
834 ret = mp_register_ioapic(id: ioapic_id, address: phys_addr, gsi_base, cfg: &cfg);
835 mutex_unlock(lock: &acpi_ioapic_lock);
836#endif
837
838 return ret;
839}
840EXPORT_SYMBOL(acpi_register_ioapic);
841
842int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
843{
844 int ret = -ENOSYS;
845
846#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
847 mutex_lock(lock: &acpi_ioapic_lock);
848 ret = mp_unregister_ioapic(gsi_base);
849 mutex_unlock(lock: &acpi_ioapic_lock);
850#endif
851
852 return ret;
853}
854EXPORT_SYMBOL(acpi_unregister_ioapic);
855
856/**
857 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base
858 * has been registered
859 * @handle: ACPI handle of the IOAPIC device
860 * @gsi_base: GSI base associated with the IOAPIC
861 *
862 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
863 * with acpi_register_ioapic()/acpi_unregister_ioapic().
864 */
865int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
866{
867 int ret = 0;
868
869#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
870 mutex_lock(lock: &acpi_ioapic_lock);
871 ret = mp_ioapic_registered(gsi_base);
872 mutex_unlock(lock: &acpi_ioapic_lock);
873#endif
874
875 return ret;
876}
877
878static int __init acpi_parse_sbf(struct acpi_table_header *table)
879{
880 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
881
882 sbf_port = sb->cmos_index; /* Save CMOS port */
883
884 return 0;
885}
886
887#ifdef CONFIG_HPET_TIMER
888#include <asm/hpet.h>
889
890static struct resource *hpet_res __initdata;
891
892static int __init acpi_parse_hpet(struct acpi_table_header *table)
893{
894 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
895
896 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
897 pr_warn("HPET timers must be located in memory.\n");
898 return -1;
899 }
900
901 hpet_address = hpet_tbl->address.address;
902 hpet_blockid = hpet_tbl->sequence;
903
904 /*
905 * Some broken BIOSes advertise HPET at 0x0. We really do not
906 * want to allocate a resource there.
907 */
908 if (!hpet_address) {
909 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address);
910 return 0;
911 }
912#ifdef CONFIG_X86_64
913 /*
914 * Some even more broken BIOSes advertise HPET at
915 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
916 * some noise:
917 */
918 if (hpet_address == 0xfed0000000000000UL) {
919 if (!hpet_force_user) {
920 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n",
921 hpet_tbl->id);
922 hpet_address = 0;
923 return 0;
924 }
925 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n",
926 hpet_tbl->id);
927 hpet_address >>= 32;
928 }
929#endif
930 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address);
931
932 /*
933 * Allocate and initialize the HPET firmware resource for adding into
934 * the resource tree during the lateinit timeframe.
935 */
936#define HPET_RESOURCE_NAME_SIZE 9
937 hpet_res = memblock_alloc_or_panic(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
938 SMP_CACHE_BYTES);
939
940 hpet_res->name = (void *)&hpet_res[1];
941 hpet_res->flags = IORESOURCE_MEM;
942 snprintf(buf: (char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, fmt: "HPET %u",
943 hpet_tbl->sequence);
944
945 hpet_res->start = hpet_address;
946 hpet_res->end = hpet_address + (1 * 1024) - 1;
947
948 return 0;
949}
950
951/*
952 * hpet_insert_resource inserts the HPET resources used into the resource
953 * tree.
954 */
955static __init int hpet_insert_resource(void)
956{
957 if (!hpet_res)
958 return 1;
959
960 return insert_resource(parent: &iomem_resource, new: hpet_res);
961}
962
963late_initcall(hpet_insert_resource);
964
965#else
966#define acpi_parse_hpet NULL
967#endif
968
969static int __init acpi_parse_fadt(struct acpi_table_header *table)
970{
971 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
972 pr_debug("no legacy devices present\n");
973 x86_platform.legacy.devices.pnpbios = 0;
974 }
975
976 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
977 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
978 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
979 pr_debug("i8042 controller is absent\n");
980 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
981 }
982
983 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
984 pr_debug("not registering RTC platform device\n");
985 x86_platform.legacy.rtc = 0;
986 }
987
988 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
989 pr_debug("probing for VGA not safe\n");
990 x86_platform.legacy.no_vga = 1;
991 }
992
993#ifdef CONFIG_X86_PM_TIMER
994 /* detect the location of the ACPI PM Timer */
995 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
996 /* FADT rev. 2 */
997 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
998 ACPI_ADR_SPACE_SYSTEM_IO)
999 return 0;
1000
1001 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
1002 /*
1003 * "X" fields are optional extensions to the original V1.0
1004 * fields, so we must selectively expand V1.0 fields if the
1005 * corresponding X field is zero.
1006 */
1007 if (!pmtmr_ioport)
1008 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1009 } else {
1010 /* FADT rev. 1 */
1011 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1012 }
1013 if (pmtmr_ioport)
1014 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport);
1015#endif
1016 return 0;
1017}
1018
1019#ifdef CONFIG_X86_LOCAL_APIC
1020/*
1021 * Parse LAPIC entries in MADT
1022 * returns 0 on success, < 0 on error
1023 */
1024
1025static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1026{
1027 int count;
1028
1029 if (!boot_cpu_has(X86_FEATURE_APIC))
1030 return -ENODEV;
1031
1032 /*
1033 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1034 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1035 */
1036
1037 count = acpi_table_parse_madt(id: ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1038 handler: acpi_parse_lapic_addr_ovr, max_entries: 0);
1039 if (count < 0) {
1040 pr_err("Error parsing LAPIC address override entry\n");
1041 return count;
1042 }
1043
1044 register_lapic_address(address: acpi_lapic_addr);
1045
1046 return count;
1047}
1048
1049static int __init acpi_parse_madt_lapic_entries(void)
1050{
1051 int count, x2count = 0;
1052 struct acpi_subtable_proc madt_proc[2];
1053 int ret;
1054
1055 if (!boot_cpu_has(X86_FEATURE_APIC))
1056 return -ENODEV;
1057
1058 count = acpi_table_parse_madt(id: ACPI_MADT_TYPE_LOCAL_SAPIC,
1059 handler: acpi_parse_sapic, MAX_LOCAL_APIC);
1060
1061 if (!count) {
1062 /* Check if there are valid LAPIC entries */
1063 acpi_table_parse_madt(id: ACPI_MADT_TYPE_LOCAL_APIC, handler: acpi_check_lapic, MAX_LOCAL_APIC);
1064
1065 /*
1066 * Enumerate the APIC IDs in the order that they appear in the
1067 * MADT, no matter LAPIC entry or x2APIC entry is used.
1068 */
1069 memset(s: madt_proc, c: 0, n: sizeof(madt_proc));
1070 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1071 madt_proc[0].handler = acpi_parse_lapic;
1072 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1073 madt_proc[1].handler = acpi_parse_x2apic;
1074 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1075 table_size: sizeof(struct acpi_table_madt),
1076 proc: madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1077 if (ret < 0) {
1078 pr_err("Error parsing LAPIC/X2APIC entries\n");
1079 return ret;
1080 }
1081 count = madt_proc[0].count;
1082 x2count = madt_proc[1].count;
1083 }
1084 if (!count && !x2count) {
1085 pr_err("No LAPIC entries present\n");
1086 /* TBD: Cleanup to allow fallback to MPS */
1087 return -ENODEV;
1088 } else if (count < 0 || x2count < 0) {
1089 pr_err("Error parsing LAPIC entry\n");
1090 /* TBD: Cleanup to allow fallback to MPS */
1091 return count;
1092 }
1093
1094 x2count = acpi_table_parse_madt(id: ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1095 handler: acpi_parse_x2apic_nmi, max_entries: 0);
1096 count = acpi_table_parse_madt(id: ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1097 handler: acpi_parse_lapic_nmi, max_entries: 0);
1098 if (count < 0 || x2count < 0) {
1099 pr_err("Error parsing LAPIC NMI entry\n");
1100 /* TBD: Cleanup to allow fallback to MPS */
1101 return count;
1102 }
1103 return 0;
1104}
1105#endif /* CONFIG_X86_LOCAL_APIC */
1106
1107#ifdef CONFIG_X86_IO_APIC
1108static void __init mp_config_acpi_legacy_irqs(void)
1109{
1110 int i;
1111 struct mpc_intsrc mp_irq;
1112
1113#ifdef CONFIG_EISA
1114 /*
1115 * Fabricate the legacy ISA bus (bus #31).
1116 */
1117 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1118#endif
1119 set_bit(MP_ISA_BUS, addr: mp_bus_not_pci);
1120 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1121
1122 /*
1123 * Use the default configuration for the IRQs 0-15. Unless
1124 * overridden by (MADT) interrupt source override entries.
1125 */
1126 for (i = 0; i < nr_legacy_irqs(); i++) {
1127 int ioapic, pin;
1128 unsigned int dstapic;
1129 int idx;
1130 u32 gsi;
1131
1132 /* Locate the gsi that irq i maps to. */
1133 if (acpi_isa_irq_to_gsi(isa_irq: i, gsi: &gsi))
1134 continue;
1135
1136 /*
1137 * Locate the IOAPIC that manages the ISA IRQ.
1138 */
1139 ioapic = mp_find_ioapic(gsi);
1140 if (ioapic < 0)
1141 continue;
1142 pin = mp_find_ioapic_pin(ioapic, gsi);
1143 dstapic = mpc_ioapic_id(ioapic);
1144
1145 for (idx = 0; idx < mp_irq_entries; idx++) {
1146 struct mpc_intsrc *irq = mp_irqs + idx;
1147
1148 /* Do we already have a mapping for this ISA IRQ? */
1149 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1150 break;
1151
1152 /* Do we already have a mapping for this IOAPIC pin */
1153 if (irq->dstapic == dstapic && irq->dstirq == pin)
1154 break;
1155 }
1156
1157 if (idx != mp_irq_entries) {
1158 pr_debug("ACPI: IRQ%d used by override.\n", i);
1159 continue; /* IRQ already used */
1160 }
1161
1162 mp_irq.type = MP_INTSRC;
1163 mp_irq.irqflag = 0; /* Conforming */
1164 mp_irq.srcbus = MP_ISA_BUS;
1165 mp_irq.dstapic = dstapic;
1166 mp_irq.irqtype = mp_INT;
1167 mp_irq.srcbusirq = i; /* Identity mapped */
1168 mp_irq.dstirq = pin;
1169
1170 mp_save_irq(m: &mp_irq);
1171 }
1172}
1173
1174/*
1175 * Parse IOAPIC related entries in MADT
1176 * returns 0 on success, < 0 on error
1177 */
1178static int __init acpi_parse_madt_ioapic_entries(void)
1179{
1180 int count;
1181
1182 /*
1183 * ACPI interpreter is required to complete interrupt setup,
1184 * so if it is off, don't enumerate the io-apics with ACPI.
1185 * If MPS is present, it will handle them,
1186 * otherwise the system will stay in PIC mode
1187 */
1188 if (acpi_disabled || acpi_noirq)
1189 return -ENODEV;
1190
1191 if (!boot_cpu_has(X86_FEATURE_APIC))
1192 return -ENODEV;
1193
1194 /*
1195 * if "noapic" boot option, don't look for IO-APICs
1196 */
1197 if (ioapic_is_disabled) {
1198 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
1199 return -ENODEV;
1200 }
1201
1202 count = acpi_table_parse_madt(id: ACPI_MADT_TYPE_IO_APIC, handler: acpi_parse_ioapic,
1203 MAX_IO_APICS);
1204 if (!count) {
1205 pr_err("No IOAPIC entries present\n");
1206 return -ENODEV;
1207 } else if (count < 0) {
1208 pr_err("Error parsing IOAPIC entry\n");
1209 return count;
1210 }
1211
1212 count = acpi_table_parse_madt(id: ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1213 handler: acpi_parse_int_src_ovr,
1214 max_entries: irq_get_nr_irqs());
1215 if (count < 0) {
1216 pr_err("Error parsing interrupt source overrides entry\n");
1217 /* TBD: Cleanup to allow fallback to MPS */
1218 return count;
1219 }
1220
1221 /*
1222 * If BIOS did not supply an INT_SRC_OVR for the SCI
1223 * pretend we got one so we can set the SCI flags.
1224 * But ignore setting up SCI on hardware reduced platforms.
1225 */
1226 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1227 acpi_sci_ioapic_setup(bus_irq: acpi_gbl_FADT.sci_interrupt, polarity: 0, trigger: 0,
1228 gsi: acpi_gbl_FADT.sci_interrupt);
1229
1230 /* Fill in identity legacy mappings where no override */
1231 mp_config_acpi_legacy_irqs();
1232
1233 count = acpi_table_parse_madt(id: ACPI_MADT_TYPE_NMI_SOURCE,
1234 handler: acpi_parse_nmi_src,
1235 max_entries: irq_get_nr_irqs());
1236 if (count < 0) {
1237 pr_err("Error parsing NMI SRC entry\n");
1238 /* TBD: Cleanup to allow fallback to MPS */
1239 return count;
1240 }
1241
1242 return 0;
1243}
1244#else
1245static inline int acpi_parse_madt_ioapic_entries(void)
1246{
1247 return -1;
1248}
1249#endif /* !CONFIG_X86_IO_APIC */
1250
1251static void __init early_acpi_process_madt(void)
1252{
1253#ifdef CONFIG_X86_LOCAL_APIC
1254 int error;
1255
1256 if (!acpi_table_parse(ACPI_SIG_MADT, handler: acpi_parse_madt)) {
1257
1258 /*
1259 * Parse MADT LAPIC entries
1260 */
1261 error = early_acpi_parse_madt_lapic_addr_ovr();
1262 if (!error) {
1263 acpi_lapic = 1;
1264 smp_found_config = 1;
1265 }
1266 if (error == -EINVAL) {
1267 /*
1268 * Dell Precision Workstation 410, 610 come here.
1269 */
1270 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1271 disable_acpi();
1272 }
1273 }
1274#endif
1275}
1276
1277static void __init acpi_process_madt(void)
1278{
1279#ifdef CONFIG_X86_LOCAL_APIC
1280 int error;
1281
1282 if (!acpi_table_parse(ACPI_SIG_MADT, handler: acpi_parse_madt)) {
1283
1284 /*
1285 * Parse MADT LAPIC entries
1286 */
1287 error = acpi_parse_madt_lapic_entries();
1288 if (!error) {
1289 acpi_lapic = 1;
1290
1291 /*
1292 * Parse MADT IO-APIC entries
1293 */
1294 mutex_lock(lock: &acpi_ioapic_lock);
1295 error = acpi_parse_madt_ioapic_entries();
1296 mutex_unlock(lock: &acpi_ioapic_lock);
1297 if (!error) {
1298 acpi_set_irq_model_ioapic();
1299
1300 smp_found_config = 1;
1301 }
1302
1303#ifdef CONFIG_ACPI_MADT_WAKEUP
1304 /*
1305 * Parse MADT MP Wake entry.
1306 */
1307 acpi_table_parse_madt(id: ACPI_MADT_TYPE_MULTIPROC_WAKEUP,
1308 handler: acpi_parse_mp_wake, max_entries: 1);
1309#endif
1310 }
1311 if (error == -EINVAL) {
1312 /*
1313 * Dell Precision Workstation 410, 610 come here.
1314 */
1315 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1316 disable_acpi();
1317 }
1318 } else {
1319 /*
1320 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1321 * In the event an MPS table was found, forget it.
1322 * Boot with "acpi=off" to use MPS on such a system.
1323 */
1324 if (smp_found_config) {
1325 pr_warn("No APIC-table, disabling MPS\n");
1326 smp_found_config = 0;
1327 }
1328 }
1329
1330 /*
1331 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1332 * processors, where MPS only supports physical.
1333 */
1334 if (acpi_lapic && acpi_ioapic)
1335 pr_info("Using ACPI (MADT) for SMP configuration information\n");
1336 else if (acpi_lapic)
1337 pr_info("Using ACPI for processor (LAPIC) configuration information\n");
1338#endif
1339 return;
1340}
1341
1342static int __init disable_acpi_irq(const struct dmi_system_id *d)
1343{
1344 if (!acpi_force) {
1345 pr_notice("%s detected: force use of acpi=noirq\n", d->ident);
1346 acpi_noirq_set();
1347 }
1348 return 0;
1349}
1350
1351static int __init disable_acpi_pci(const struct dmi_system_id *d)
1352{
1353 if (!acpi_force) {
1354 pr_notice("%s detected: force use of pci=noacpi\n", d->ident);
1355 acpi_disable_pci();
1356 }
1357 return 0;
1358}
1359
1360static int __init disable_acpi_xsdt(const struct dmi_system_id *d)
1361{
1362 if (!acpi_force) {
1363 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident);
1364 acpi_gbl_do_not_use_xsdt = TRUE;
1365 } else {
1366 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n");
1367 }
1368 return 0;
1369}
1370
1371static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1372{
1373 if (!acpi_force) {
1374 pr_notice("%s detected: acpi off\n", d->ident);
1375 disable_acpi();
1376 } else {
1377 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n");
1378 }
1379 return 0;
1380}
1381
1382/*
1383 * Force ignoring BIOS IRQ0 override
1384 */
1385static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1386{
1387 if (!acpi_skip_timer_override) {
1388 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1389 d->ident);
1390 acpi_skip_timer_override = 1;
1391 }
1392 return 0;
1393}
1394
1395/*
1396 * ACPI offers an alternative platform interface model that removes
1397 * ACPI hardware requirements for platforms that do not implement
1398 * the PC Architecture.
1399 *
1400 * We initialize the Hardware-reduced ACPI model here:
1401 */
1402void __init acpi_generic_reduced_hw_init(void)
1403{
1404 /*
1405 * Override x86_init functions and bypass legacy PIC in
1406 * hardware reduced ACPI mode.
1407 */
1408 x86_init.timers.timer_init = x86_init_noop;
1409 x86_init.irqs.pre_vector_init = x86_init_noop;
1410 legacy_pic = &null_legacy_pic;
1411}
1412
1413static void __init acpi_reduced_hw_init(void)
1414{
1415 if (acpi_gbl_reduced_hardware)
1416 x86_init.acpi.reduced_hw_early_init();
1417}
1418
1419/*
1420 * If your system is blacklisted here, but you find that acpi=force
1421 * works for you, please contact linux-acpi@vger.kernel.org
1422 */
1423static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1424 /*
1425 * Boxes that need ACPI disabled
1426 */
1427 {
1428 .callback = dmi_disable_acpi,
1429 .ident = "IBM Thinkpad",
1430 .matches = {
1431 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1432 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1433 },
1434 },
1435
1436 /*
1437 * Boxes that need ACPI PCI IRQ routing disabled
1438 */
1439 {
1440 .callback = disable_acpi_irq,
1441 .ident = "ASUS A7V",
1442 .matches = {
1443 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1444 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1445 /* newer BIOS, Revision 1011, does work */
1446 DMI_MATCH(DMI_BIOS_VERSION,
1447 "ASUS A7V ACPI BIOS Revision 1007"),
1448 },
1449 },
1450 {
1451 /*
1452 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1453 * for LPC bridge, which is needed for the PCI
1454 * interrupt links to work. DSDT fix is in bug 5966.
1455 * 2645, 2646 model numbers are shared with 600/600E/600X
1456 */
1457 .callback = disable_acpi_irq,
1458 .ident = "IBM Thinkpad 600 Series 2645",
1459 .matches = {
1460 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1461 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1462 },
1463 },
1464 {
1465 .callback = disable_acpi_irq,
1466 .ident = "IBM Thinkpad 600 Series 2646",
1467 .matches = {
1468 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1469 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1470 },
1471 },
1472 /*
1473 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1474 */
1475 { /* _BBN 0 bug */
1476 .callback = disable_acpi_pci,
1477 .ident = "ASUS PR-DLS",
1478 .matches = {
1479 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1480 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1481 DMI_MATCH(DMI_BIOS_VERSION,
1482 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1483 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1484 },
1485 },
1486 {
1487 .callback = disable_acpi_pci,
1488 .ident = "Acer TravelMate 36x Laptop",
1489 .matches = {
1490 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1491 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1492 },
1493 },
1494 /*
1495 * Boxes that need ACPI XSDT use disabled due to corrupted tables
1496 */
1497 {
1498 .callback = disable_acpi_xsdt,
1499 .ident = "Advantech DAC-BJ01",
1500 .matches = {
1501 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1502 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"),
1503 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"),
1504 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"),
1505 },
1506 },
1507 {}
1508};
1509
1510/* second table for DMI checks that should run after early-quirks */
1511static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1512 /*
1513 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1514 * which includes some code which overrides all temperature
1515 * trip points to 16C if the INTIN2 input of the I/O APIC
1516 * is enabled. This input is incorrectly designated the
1517 * ISA IRQ 0 via an interrupt source override even though
1518 * it is wired to the output of the master 8259A and INTIN0
1519 * is not connected at all. Force ignoring BIOS IRQ0
1520 * override in that cases.
1521 */
1522 {
1523 .callback = dmi_ignore_irq0_timer_override,
1524 .ident = "HP nx6115 laptop",
1525 .matches = {
1526 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1527 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1528 },
1529 },
1530 {
1531 .callback = dmi_ignore_irq0_timer_override,
1532 .ident = "HP NX6125 laptop",
1533 .matches = {
1534 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1535 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1536 },
1537 },
1538 {
1539 .callback = dmi_ignore_irq0_timer_override,
1540 .ident = "HP NX6325 laptop",
1541 .matches = {
1542 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1543 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1544 },
1545 },
1546 {
1547 .callback = dmi_ignore_irq0_timer_override,
1548 .ident = "HP 6715b laptop",
1549 .matches = {
1550 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1551 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1552 },
1553 },
1554 {
1555 .callback = dmi_ignore_irq0_timer_override,
1556 .ident = "FUJITSU SIEMENS",
1557 .matches = {
1558 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1559 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1560 },
1561 },
1562 {}
1563};
1564
1565/*
1566 * acpi_boot_table_init() and acpi_boot_init()
1567 * called from setup_arch(), always.
1568 * 1. checksums all tables
1569 * 2. enumerates lapics
1570 * 3. enumerates io-apics
1571 *
1572 * acpi_table_init() is separate to allow reading SRAT without
1573 * other side effects.
1574 *
1575 * side effects of acpi_boot_init:
1576 * acpi_lapic = 1 if LAPIC found
1577 * acpi_ioapic = 1 if IOAPIC found
1578 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1579 * if acpi_blacklisted() acpi_disabled = 1;
1580 * acpi_irq_model=...
1581 * ...
1582 */
1583
1584void __init acpi_boot_table_init(void)
1585{
1586 dmi_check_system(list: acpi_dmi_table);
1587
1588 /*
1589 * If acpi_disabled, bail out
1590 */
1591 if (acpi_disabled)
1592 return;
1593
1594 /*
1595 * Initialize the ACPI boot-time table parser.
1596 */
1597 if (acpi_locate_initial_tables())
1598 disable_acpi();
1599 else
1600 acpi_reserve_initial_tables();
1601}
1602
1603int __init early_acpi_boot_init(void)
1604{
1605 if (acpi_disabled)
1606 return 1;
1607
1608 acpi_table_init_complete();
1609
1610 acpi_table_parse(ACPI_SIG_BOOT, handler: acpi_parse_sbf);
1611
1612 /*
1613 * blacklist may disable ACPI entirely
1614 */
1615 if (acpi_blacklisted()) {
1616 if (acpi_force) {
1617 pr_warn("acpi=force override\n");
1618 } else {
1619 pr_warn("Disabling ACPI support\n");
1620 disable_acpi();
1621 return 1;
1622 }
1623 }
1624
1625 /*
1626 * Process the Multiple APIC Description Table (MADT), if present
1627 */
1628 early_acpi_process_madt();
1629
1630 /*
1631 * Hardware-reduced ACPI mode initialization:
1632 */
1633 acpi_reduced_hw_init();
1634
1635 return 0;
1636}
1637
1638int __init acpi_boot_init(void)
1639{
1640 /* those are executed after early-quirks are executed */
1641 dmi_check_system(list: acpi_dmi_table_late);
1642
1643 /*
1644 * If acpi_disabled, bail out
1645 */
1646 if (acpi_disabled)
1647 return 1;
1648
1649 acpi_table_parse(ACPI_SIG_BOOT, handler: acpi_parse_sbf);
1650
1651 /*
1652 * set sci_int and PM timer address
1653 */
1654 acpi_table_parse(ACPI_SIG_FADT, handler: acpi_parse_fadt);
1655
1656 /*
1657 * Process the Multiple APIC Description Table (MADT), if present
1658 */
1659 acpi_process_madt();
1660
1661 acpi_table_parse(ACPI_SIG_HPET, handler: acpi_parse_hpet);
1662 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1663 acpi_table_parse(ACPI_SIG_BGRT, handler: acpi_parse_bgrt);
1664
1665 if (!acpi_noirq)
1666 x86_init.pci.init = pci_acpi_init;
1667
1668 /* Do not enable ACPI SPCR console by default */
1669 acpi_parse_spcr(enable_earlycon: earlycon_acpi_spcr_enable, enable_console: false);
1670 return 0;
1671}
1672
1673static int __init parse_acpi(char *arg)
1674{
1675 if (!arg)
1676 return -EINVAL;
1677
1678 /* "acpi=off" disables both ACPI table parsing and interpreter */
1679 if (strcmp(arg, "off") == 0) {
1680 disable_acpi();
1681 }
1682 /* acpi=force to over-ride black-list */
1683 else if (strcmp(arg, "force") == 0) {
1684 acpi_force = 1;
1685 acpi_disabled = 0;
1686 }
1687 /* acpi=strict disables out-of-spec workarounds */
1688 else if (strcmp(arg, "strict") == 0) {
1689 acpi_strict = 1;
1690 }
1691 /* acpi=rsdt use RSDT instead of XSDT */
1692 else if (strcmp(arg, "rsdt") == 0) {
1693 acpi_gbl_do_not_use_xsdt = TRUE;
1694 }
1695 /* "acpi=noirq" disables ACPI interrupt routing */
1696 else if (strcmp(arg, "noirq") == 0) {
1697 acpi_noirq_set();
1698 }
1699 /* "acpi=copy_dsdt" copies DSDT */
1700 else if (strcmp(arg, "copy_dsdt") == 0) {
1701 acpi_gbl_copy_dsdt_locally = 1;
1702 }
1703 /* "acpi=nocmcff" disables FF mode for corrected errors */
1704 else if (strcmp(arg, "nocmcff") == 0) {
1705 acpi_disable_cmcff = 1;
1706 } else {
1707 /* Core will printk when we return error. */
1708 return -EINVAL;
1709 }
1710 return 0;
1711}
1712early_param("acpi", parse_acpi);
1713
1714static int __init parse_acpi_bgrt(char *arg)
1715{
1716 acpi_nobgrt = true;
1717 return 0;
1718}
1719early_param("bgrt_disable", parse_acpi_bgrt);
1720
1721/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1722static int __init parse_pci(char *arg)
1723{
1724 if (arg && strcmp(arg, "noacpi") == 0)
1725 acpi_disable_pci();
1726 return 0;
1727}
1728early_param("pci", parse_pci);
1729
1730int __init acpi_mps_check(void)
1731{
1732#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1733/* mptable code is not built-in*/
1734
1735 /*
1736 * Xen disables ACPI in PV DomU guests but it still emulates APIC and
1737 * supports SMP. Returning early here ensures that APIC is not disabled
1738 * unnecessarily and the guest is not limited to a single vCPU.
1739 */
1740 if (xen_pv_domain() && !xen_initial_domain())
1741 return 0;
1742
1743 if (acpi_disabled || acpi_noirq) {
1744 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
1745 return 1;
1746 }
1747#endif
1748 return 0;
1749}
1750
1751#ifdef CONFIG_X86_IO_APIC
1752static int __init parse_acpi_skip_timer_override(char *arg)
1753{
1754 acpi_skip_timer_override = 1;
1755 return 0;
1756}
1757early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1758
1759static int __init parse_acpi_use_timer_override(char *arg)
1760{
1761 acpi_use_timer_override = 1;
1762 return 0;
1763}
1764early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1765#endif /* CONFIG_X86_IO_APIC */
1766
1767static int __init setup_acpi_sci(char *s)
1768{
1769 if (!s)
1770 return -EINVAL;
1771 if (!strcmp(s, "edge"))
1772 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1773 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1774 else if (!strcmp(s, "level"))
1775 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1776 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1777 else if (!strcmp(s, "high"))
1778 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1779 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1780 else if (!strcmp(s, "low"))
1781 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1782 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1783 else
1784 return -EINVAL;
1785 return 0;
1786}
1787early_param("acpi_sci", setup_acpi_sci);
1788
1789int __acpi_acquire_global_lock(unsigned int *lock)
1790{
1791 unsigned int old, new, val;
1792
1793 old = READ_ONCE(*lock);
1794 do {
1795 val = (old >> 1) & 0x1;
1796 new = (old & ~0x3) + 2 + val;
1797 } while (!try_cmpxchg(lock, &old, new));
1798
1799 if (val)
1800 return 0;
1801
1802 return -1;
1803}
1804
1805int __acpi_release_global_lock(unsigned int *lock)
1806{
1807 unsigned int old, new;
1808
1809 old = READ_ONCE(*lock);
1810 do {
1811 new = old & ~0x3;
1812 } while (!try_cmpxchg(lock, &old, new));
1813 return old & 0x1;
1814}
1815
1816void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1817{
1818 e820__range_add(start: addr, size, type: E820_TYPE_NVS);
1819 e820__update_table_print();
1820}
1821
1822void x86_default_set_root_pointer(u64 addr)
1823{
1824 boot_params.acpi_rsdp_addr = addr;
1825}
1826
1827u64 x86_default_get_root_pointer(void)
1828{
1829 return boot_params.acpi_rsdp_addr;
1830}
1831
1832#ifdef CONFIG_XEN_PV
1833void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
1834{
1835 return ioremap_cache(phys, size);
1836}
1837
1838void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, acpi_size size) =
1839 x86_acpi_os_ioremap;
1840EXPORT_SYMBOL_GPL(acpi_os_ioremap);
1841#endif
1842