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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
9#include <linux/init.h>
10#include <linux/acpi.h>
11#include <linux/acpi_pmtmr.h>
12#include <linux/efi.h>
13#include <linux/cpumask.h>
14#include <linux/export.h>
15#include <linux/dmi.h>
16#include <linux/irq.h>
17#include <linux/slab.h>
18#include <linux/memblock.h>
19#include <linux/ioport.h>
20#include <linux/pci.h>
21#include <linux/efi-bgrt.h>
22#include <linux/serial_core.h>
23
24#include <asm/e820/api.h>
25#include <asm/irqdomain.h>
26#include <asm/pci_x86.h>
27#include <asm/pgtable.h>
28#include <asm/io_apic.h>
29#include <asm/apic.h>
30#include <asm/io.h>
31#include <asm/mpspec.h>
32#include <asm/smp.h>
33#include <asm/i8259.h>
34#include <asm/setup.h>
35
36#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
37static int __initdata acpi_force = 0;
38int acpi_disabled;
39EXPORT_SYMBOL(acpi_disabled);
40
41#ifdef CONFIG_X86_64
42# include <asm/proto.h>
43#endif /* X86 */
44
45#define PREFIX "ACPI: "
46
47int acpi_noirq; /* skip ACPI IRQ initialization */
48int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
49EXPORT_SYMBOL(acpi_pci_disabled);
50
51int acpi_lapic;
52int acpi_ioapic;
53int acpi_strict;
54int acpi_disable_cmcff;
55
56/* ACPI SCI override configuration */
57u8 acpi_sci_flags __initdata;
58u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
59int acpi_skip_timer_override __initdata;
60int acpi_use_timer_override __initdata;
61int acpi_fix_pin2_polarity __initdata;
62
63#ifdef CONFIG_X86_LOCAL_APIC
64static 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 */
79static 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 */
90enum 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 */
97static 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 */
105void __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
114void __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
123static 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 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
133 return -ENODEV;
134 }
135
136 if (madt->address) {
137 acpi_lapic_addr = (u64) madt->address;
138
139 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
140 madt->address);
141 }
142
143 default_acpi_madt_oem_check(madt->header.oem_id,
144 madt->header.oem_table_id);
145
146 return 0;
147}
148
149/**
150 * acpi_register_lapic - register a local apic and generates a logic cpu number
151 * @id: local apic id to register
152 * @acpiid: ACPI id to register
153 * @enabled: this cpu is enabled or not
154 *
155 * Returns the logic cpu number which maps to the local apic
156 */
157static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
158{
159 unsigned int ver = 0;
160 int cpu;
161
162 if (id >= MAX_LOCAL_APIC) {
163 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
164 return -EINVAL;
165 }
166
167 if (!enabled) {
168 ++disabled_cpus;
169 return -EINVAL;
170 }
171
172 if (boot_cpu_physical_apicid != -1U)
173 ver = boot_cpu_apic_version;
174
175 cpu = generic_processor_info(id, ver);
176 if (cpu >= 0)
177 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
178
179 return cpu;
180}
181
182static int __init
183acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
184{
185 struct acpi_madt_local_x2apic *processor = NULL;
186#ifdef CONFIG_X86_X2APIC
187 u32 apic_id;
188 u8 enabled;
189#endif
190
191 processor = (struct acpi_madt_local_x2apic *)header;
192
193 if (BAD_MADT_ENTRY(processor, end))
194 return -EINVAL;
195
196 acpi_table_print_madt_entry(&header->common);
197
198#ifdef CONFIG_X86_X2APIC
199 apic_id = processor->local_apic_id;
200 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
201
202 /* Ignore invalid ID */
203 if (apic_id == 0xffffffff)
204 return 0;
205
206 /*
207 * We need to register disabled CPU as well to permit
208 * counting disabled CPUs. This allows us to size
209 * cpus_possible_map more accurately, to permit
210 * to not preallocating memory for all NR_CPUS
211 * when we use CPU hotplug.
212 */
213 if (!apic->apic_id_valid(apic_id)) {
214 if (enabled)
215 pr_warn(PREFIX "x2apic entry ignored\n");
216 return 0;
217 }
218
219 acpi_register_lapic(apic_id, processor->uid, enabled);
220#else
221 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
222#endif
223
224 return 0;
225}
226
227static int __init
228acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
229{
230 struct acpi_madt_local_apic *processor = NULL;
231
232 processor = (struct acpi_madt_local_apic *)header;
233
234 if (BAD_MADT_ENTRY(processor, end))
235 return -EINVAL;
236
237 acpi_table_print_madt_entry(&header->common);
238
239 /* Ignore invalid ID */
240 if (processor->id == 0xff)
241 return 0;
242
243 /*
244 * We need to register disabled CPU as well to permit
245 * counting disabled CPUs. This allows us to size
246 * cpus_possible_map more accurately, to permit
247 * to not preallocating memory for all NR_CPUS
248 * when we use CPU hotplug.
249 */
250 acpi_register_lapic(processor->id, /* APIC ID */
251 processor->processor_id, /* ACPI ID */
252 processor->lapic_flags & ACPI_MADT_ENABLED);
253
254 return 0;
255}
256
257static int __init
258acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
259{
260 struct acpi_madt_local_sapic *processor = NULL;
261
262 processor = (struct acpi_madt_local_sapic *)header;
263
264 if (BAD_MADT_ENTRY(processor, end))
265 return -EINVAL;
266
267 acpi_table_print_madt_entry(&header->common);
268
269 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
270 processor->processor_id, /* ACPI ID */
271 processor->lapic_flags & ACPI_MADT_ENABLED);
272
273 return 0;
274}
275
276static int __init
277acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
278 const unsigned long end)
279{
280 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
281
282 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
283
284 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
285 return -EINVAL;
286
287 acpi_table_print_madt_entry(&header->common);
288
289 acpi_lapic_addr = lapic_addr_ovr->address;
290
291 return 0;
292}
293
294static int __init
295acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
296 const unsigned long end)
297{
298 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
299
300 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
301
302 if (BAD_MADT_ENTRY(x2apic_nmi, end))
303 return -EINVAL;
304
305 acpi_table_print_madt_entry(&header->common);
306
307 if (x2apic_nmi->lint != 1)
308 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
309
310 return 0;
311}
312
313static int __init
314acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
315{
316 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
317
318 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
319
320 if (BAD_MADT_ENTRY(lapic_nmi, end))
321 return -EINVAL;
322
323 acpi_table_print_madt_entry(&header->common);
324
325 if (lapic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
327
328 return 0;
329}
330
331#endif /*CONFIG_X86_LOCAL_APIC */
332
333#ifdef CONFIG_X86_IO_APIC
334#define MP_ISA_BUS 0
335
336static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
337 u8 trigger, u32 gsi);
338
339static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
340 u32 gsi)
341{
342 /*
343 * Check bus_irq boundary.
344 */
345 if (bus_irq >= NR_IRQS_LEGACY) {
346 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
347 return;
348 }
349
350 /*
351 * TBD: This check is for faulty timer entries, where the override
352 * erroneously sets the trigger to level, resulting in a HUGE
353 * increase of timer interrupts!
354 */
355 if ((bus_irq == 0) && (trigger == 3))
356 trigger = 1;
357
358 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
359 return;
360 /*
361 * Reset default identity mapping if gsi is also an legacy IRQ,
362 * otherwise there will be more than one entry with the same GSI
363 * and acpi_isa_irq_to_gsi() may give wrong result.
364 */
365 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
366 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
367 isa_irq_to_gsi[bus_irq] = gsi;
368}
369
370static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
371 int polarity)
372{
373#ifdef CONFIG_X86_MPPARSE
374 struct mpc_intsrc mp_irq;
375 struct pci_dev *pdev;
376 unsigned char number;
377 unsigned int devfn;
378 int ioapic;
379 u8 pin;
380
381 if (!acpi_ioapic)
382 return 0;
383 if (!dev || !dev_is_pci(dev))
384 return 0;
385
386 pdev = to_pci_dev(dev);
387 number = pdev->bus->number;
388 devfn = pdev->devfn;
389 pin = pdev->pin;
390 /* print the entry should happen on mptable identically */
391 mp_irq.type = MP_INTSRC;
392 mp_irq.irqtype = mp_INT;
393 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
394 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
395 mp_irq.srcbus = number;
396 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
397 ioapic = mp_find_ioapic(gsi);
398 mp_irq.dstapic = mpc_ioapic_id(ioapic);
399 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
400
401 mp_save_irq(&mp_irq);
402#endif
403 return 0;
404}
405
406static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
407 u8 trigger, u32 gsi)
408{
409 struct mpc_intsrc mp_irq;
410 int ioapic, pin;
411
412 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
413 ioapic = mp_find_ioapic(gsi);
414 if (ioapic < 0) {
415 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
416 return ioapic;
417 }
418
419 pin = mp_find_ioapic_pin(ioapic, gsi);
420
421 mp_irq.type = MP_INTSRC;
422 mp_irq.irqtype = mp_INT;
423 mp_irq.irqflag = (trigger << 2) | polarity;
424 mp_irq.srcbus = MP_ISA_BUS;
425 mp_irq.srcbusirq = bus_irq;
426 mp_irq.dstapic = mpc_ioapic_id(ioapic);
427 mp_irq.dstirq = pin;
428
429 mp_save_irq(&mp_irq);
430
431 return 0;
432}
433
434static int __init
435acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
436{
437 struct acpi_madt_io_apic *ioapic = NULL;
438 struct ioapic_domain_cfg cfg = {
439 .type = IOAPIC_DOMAIN_DYNAMIC,
440 .ops = &mp_ioapic_irqdomain_ops,
441 };
442
443 ioapic = (struct acpi_madt_io_apic *)header;
444
445 if (BAD_MADT_ENTRY(ioapic, end))
446 return -EINVAL;
447
448 acpi_table_print_madt_entry(&header->common);
449
450 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
451 if (ioapic->global_irq_base < nr_legacy_irqs())
452 cfg.type = IOAPIC_DOMAIN_LEGACY;
453
454 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
455 &cfg);
456
457 return 0;
458}
459
460/*
461 * Parse Interrupt Source Override for the ACPI SCI
462 */
463static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
464{
465 if (trigger == 0) /* compatible SCI trigger is level */
466 trigger = 3;
467
468 if (polarity == 0) /* compatible SCI polarity is low */
469 polarity = 3;
470
471 /* Command-line over-ride via acpi_sci= */
472 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
473 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
474
475 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
476 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
477
478 if (bus_irq < NR_IRQS_LEGACY)
479 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
480 else
481 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
482
483 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
484
485 /*
486 * stash over-ride to indicate we've been here
487 * and for later update of acpi_gbl_FADT
488 */
489 acpi_sci_override_gsi = gsi;
490 return;
491}
492
493static int __init
494acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
495 const unsigned long end)
496{
497 struct acpi_madt_interrupt_override *intsrc = NULL;
498
499 intsrc = (struct acpi_madt_interrupt_override *)header;
500
501 if (BAD_MADT_ENTRY(intsrc, end))
502 return -EINVAL;
503
504 acpi_table_print_madt_entry(&header->common);
505
506 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
507 acpi_sci_ioapic_setup(intsrc->source_irq,
508 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
509 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
510 intsrc->global_irq);
511 return 0;
512 }
513
514 if (intsrc->source_irq == 0) {
515 if (acpi_skip_timer_override) {
516 printk(PREFIX "BIOS IRQ0 override ignored.\n");
517 return 0;
518 }
519
520 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
521 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
522 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
523 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
524 }
525 }
526
527 mp_override_legacy_irq(intsrc->source_irq,
528 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
529 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
530 intsrc->global_irq);
531
532 return 0;
533}
534
535static int __init
536acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
537{
538 struct acpi_madt_nmi_source *nmi_src = NULL;
539
540 nmi_src = (struct acpi_madt_nmi_source *)header;
541
542 if (BAD_MADT_ENTRY(nmi_src, end))
543 return -EINVAL;
544
545 acpi_table_print_madt_entry(&header->common);
546
547 /* TBD: Support nimsrc entries? */
548
549 return 0;
550}
551
552#endif /* CONFIG_X86_IO_APIC */
553
554/*
555 * acpi_pic_sci_set_trigger()
556 *
557 * use ELCR to set PIC-mode trigger type for SCI
558 *
559 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
560 * it may require Edge Trigger -- use "acpi_sci=edge"
561 *
562 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
563 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
564 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
565 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
566 */
567
568void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
569{
570 unsigned int mask = 1 << irq;
571 unsigned int old, new;
572
573 /* Real old ELCR mask */
574 old = inb(0x4d0) | (inb(0x4d1) << 8);
575
576 /*
577 * If we use ACPI to set PCI IRQs, then we should clear ELCR
578 * since we will set it correctly as we enable the PCI irq
579 * routing.
580 */
581 new = acpi_noirq ? old : 0;
582
583 /*
584 * Update SCI information in the ELCR, it isn't in the PCI
585 * routing tables..
586 */
587 switch (trigger) {
588 case 1: /* Edge - clear */
589 new &= ~mask;
590 break;
591 case 3: /* Level - set */
592 new |= mask;
593 break;
594 }
595
596 if (old == new)
597 return;
598
599 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
600 outb(new, 0x4d0);
601 outb(new >> 8, 0x4d1);
602}
603
604int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
605{
606 int rc, irq, trigger, polarity;
607
608 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
609 *irqp = gsi;
610 return 0;
611 }
612
613 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
614 if (rc)
615 return rc;
616
617 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
618 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
619 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
620 if (irq < 0)
621 return irq;
622
623 *irqp = irq;
624 return 0;
625}
626EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
627
628int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
629{
630 if (isa_irq < nr_legacy_irqs() &&
631 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
632 *gsi = isa_irq_to_gsi[isa_irq];
633 return 0;
634 }
635
636 return -1;
637}
638
639static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
640 int trigger, int polarity)
641{
642#ifdef CONFIG_PCI
643 /*
644 * Make sure all (legacy) PCI IRQs are set as level-triggered.
645 */
646 if (trigger == ACPI_LEVEL_SENSITIVE)
647 elcr_set_level_irq(gsi);
648#endif
649
650 return gsi;
651}
652
653#ifdef CONFIG_X86_LOCAL_APIC
654static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
655 int trigger, int polarity)
656{
657 int irq = gsi;
658#ifdef CONFIG_X86_IO_APIC
659 int node;
660 struct irq_alloc_info info;
661
662 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
663 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
664 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
665 ioapic_set_alloc_attr(&info, node, trigger, polarity);
666
667 mutex_lock(&acpi_ioapic_lock);
668 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
669 /* Don't set up the ACPI SCI because it's already set up */
670 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
671 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
672 mutex_unlock(&acpi_ioapic_lock);
673#endif
674
675 return irq;
676}
677
678static void acpi_unregister_gsi_ioapic(u32 gsi)
679{
680#ifdef CONFIG_X86_IO_APIC
681 int irq;
682
683 mutex_lock(&acpi_ioapic_lock);
684 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
685 if (irq > 0)
686 mp_unmap_irq(irq);
687 mutex_unlock(&acpi_ioapic_lock);
688#endif
689}
690#endif
691
692int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
693 int trigger, int polarity) = acpi_register_gsi_pic;
694void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
695
696#ifdef CONFIG_ACPI_SLEEP
697int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
698#else
699int (*acpi_suspend_lowlevel)(void);
700#endif
701
702/*
703 * success: return IRQ number (>=0)
704 * failure: return < 0
705 */
706int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
707{
708 return __acpi_register_gsi(dev, gsi, trigger, polarity);
709}
710EXPORT_SYMBOL_GPL(acpi_register_gsi);
711
712void acpi_unregister_gsi(u32 gsi)
713{
714 if (__acpi_unregister_gsi)
715 __acpi_unregister_gsi(gsi);
716}
717EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
718
719#ifdef CONFIG_X86_LOCAL_APIC
720static void __init acpi_set_irq_model_ioapic(void)
721{
722 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
723 __acpi_register_gsi = acpi_register_gsi_ioapic;
724 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
725 acpi_ioapic = 1;
726}
727#endif
728
729/*
730 * ACPI based hotplug support for CPU
731 */
732#ifdef CONFIG_ACPI_HOTPLUG_CPU
733#include <acpi/processor.h>
734
735static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
736{
737#ifdef CONFIG_ACPI_NUMA
738 int nid;
739
740 nid = acpi_get_node(handle);
741 if (nid != NUMA_NO_NODE) {
742 set_apicid_to_node(physid, nid);
743 numa_set_node(cpu, nid);
744 }
745#endif
746 return 0;
747}
748
749int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
750 int *pcpu)
751{
752 int cpu;
753
754 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
755 if (cpu < 0) {
756 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
757 return cpu;
758 }
759
760 acpi_processor_set_pdc(handle);
761 acpi_map_cpu2node(handle, cpu, physid);
762
763 *pcpu = cpu;
764 return 0;
765}
766EXPORT_SYMBOL(acpi_map_cpu);
767
768int acpi_unmap_cpu(int cpu)
769{
770#ifdef CONFIG_ACPI_NUMA
771 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
772#endif
773
774 per_cpu(x86_cpu_to_apicid, cpu) = -1;
775 set_cpu_present(cpu, false);
776 num_processors--;
777
778 return (0);
779}
780EXPORT_SYMBOL(acpi_unmap_cpu);
781#endif /* CONFIG_ACPI_HOTPLUG_CPU */
782
783int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
784{
785 int ret = -ENOSYS;
786#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
787 int ioapic_id;
788 u64 addr;
789 struct ioapic_domain_cfg cfg = {
790 .type = IOAPIC_DOMAIN_DYNAMIC,
791 .ops = &mp_ioapic_irqdomain_ops,
792 };
793
794 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
795 if (ioapic_id < 0) {
796 unsigned long long uid;
797 acpi_status status;
798
799 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
800 NULL, &uid);
801 if (ACPI_FAILURE(status)) {
802 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
803 return -EINVAL;
804 }
805 ioapic_id = (int)uid;
806 }
807
808 mutex_lock(&acpi_ioapic_lock);
809 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
810 mutex_unlock(&acpi_ioapic_lock);
811#endif
812
813 return ret;
814}
815EXPORT_SYMBOL(acpi_register_ioapic);
816
817int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
818{
819 int ret = -ENOSYS;
820
821#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
822 mutex_lock(&acpi_ioapic_lock);
823 ret = mp_unregister_ioapic(gsi_base);
824 mutex_unlock(&acpi_ioapic_lock);
825#endif
826
827 return ret;
828}
829EXPORT_SYMBOL(acpi_unregister_ioapic);
830
831/**
832 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
833 * has been registered
834 * @handle: ACPI handle of the IOAPIC device
835 * @gsi_base: GSI base associated with the IOAPIC
836 *
837 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
838 * with acpi_register_ioapic()/acpi_unregister_ioapic().
839 */
840int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
841{
842 int ret = 0;
843
844#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
845 mutex_lock(&acpi_ioapic_lock);
846 ret = mp_ioapic_registered(gsi_base);
847 mutex_unlock(&acpi_ioapic_lock);
848#endif
849
850 return ret;
851}
852
853static int __init acpi_parse_sbf(struct acpi_table_header *table)
854{
855 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
856
857 sbf_port = sb->cmos_index; /* Save CMOS port */
858
859 return 0;
860}
861
862#ifdef CONFIG_HPET_TIMER
863#include <asm/hpet.h>
864
865static struct resource *hpet_res __initdata;
866
867static int __init acpi_parse_hpet(struct acpi_table_header *table)
868{
869 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
870
871 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
872 printk(KERN_WARNING PREFIX "HPET timers must be located in "
873 "memory.\n");
874 return -1;
875 }
876
877 hpet_address = hpet_tbl->address.address;
878 hpet_blockid = hpet_tbl->sequence;
879
880 /*
881 * Some broken BIOSes advertise HPET at 0x0. We really do not
882 * want to allocate a resource there.
883 */
884 if (!hpet_address) {
885 printk(KERN_WARNING PREFIX
886 "HPET id: %#x base: %#lx is invalid\n",
887 hpet_tbl->id, hpet_address);
888 return 0;
889 }
890#ifdef CONFIG_X86_64
891 /*
892 * Some even more broken BIOSes advertise HPET at
893 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
894 * some noise:
895 */
896 if (hpet_address == 0xfed0000000000000UL) {
897 if (!hpet_force_user) {
898 printk(KERN_WARNING PREFIX "HPET id: %#x "
899 "base: 0xfed0000000000000 is bogus\n "
900 "try hpet=force on the kernel command line to "
901 "fix it up to 0xfed00000.\n", hpet_tbl->id);
902 hpet_address = 0;
903 return 0;
904 }
905 printk(KERN_WARNING PREFIX
906 "HPET id: %#x base: 0xfed0000000000000 fixed up "
907 "to 0xfed00000.\n", hpet_tbl->id);
908 hpet_address >>= 32;
909 }
910#endif
911 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
912 hpet_tbl->id, hpet_address);
913
914 /*
915 * Allocate and initialize the HPET firmware resource for adding into
916 * the resource tree during the lateinit timeframe.
917 */
918#define HPET_RESOURCE_NAME_SIZE 9
919 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
920 SMP_CACHE_BYTES);
921 if (!hpet_res)
922 panic("%s: Failed to allocate %zu bytes\n", __func__,
923 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
924
925 hpet_res->name = (void *)&hpet_res[1];
926 hpet_res->flags = IORESOURCE_MEM;
927 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
928 hpet_tbl->sequence);
929
930 hpet_res->start = hpet_address;
931 hpet_res->end = hpet_address + (1 * 1024) - 1;
932
933 return 0;
934}
935
936/*
937 * hpet_insert_resource inserts the HPET resources used into the resource
938 * tree.
939 */
940static __init int hpet_insert_resource(void)
941{
942 if (!hpet_res)
943 return 1;
944
945 return insert_resource(&iomem_resource, hpet_res);
946}
947
948late_initcall(hpet_insert_resource);
949
950#else
951#define acpi_parse_hpet NULL
952#endif
953
954static int __init acpi_parse_fadt(struct acpi_table_header *table)
955{
956 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
957 pr_debug("ACPI: no legacy devices present\n");
958 x86_platform.legacy.devices.pnpbios = 0;
959 }
960
961 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
962 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
963 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
964 pr_debug("ACPI: i8042 controller is absent\n");
965 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
966 }
967
968 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
969 pr_debug("ACPI: not registering RTC platform device\n");
970 x86_platform.legacy.rtc = 0;
971 }
972
973 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
974 pr_debug("ACPI: probing for VGA not safe\n");
975 x86_platform.legacy.no_vga = 1;
976 }
977
978#ifdef CONFIG_X86_PM_TIMER
979 /* detect the location of the ACPI PM Timer */
980 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
981 /* FADT rev. 2 */
982 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
983 ACPI_ADR_SPACE_SYSTEM_IO)
984 return 0;
985
986 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
987 /*
988 * "X" fields are optional extensions to the original V1.0
989 * fields, so we must selectively expand V1.0 fields if the
990 * corresponding X field is zero.
991 */
992 if (!pmtmr_ioport)
993 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
994 } else {
995 /* FADT rev. 1 */
996 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
997 }
998 if (pmtmr_ioport)
999 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1000 pmtmr_ioport);
1001#endif
1002 return 0;
1003}
1004
1005#ifdef CONFIG_X86_LOCAL_APIC
1006/*
1007 * Parse LAPIC entries in MADT
1008 * returns 0 on success, < 0 on error
1009 */
1010
1011static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1012{
1013 int count;
1014
1015 if (!boot_cpu_has(X86_FEATURE_APIC))
1016 return -ENODEV;
1017
1018 /*
1019 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1020 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1021 */
1022
1023 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1024 acpi_parse_lapic_addr_ovr, 0);
1025 if (count < 0) {
1026 printk(KERN_ERR PREFIX
1027 "Error parsing LAPIC address override entry\n");
1028 return count;
1029 }
1030
1031 register_lapic_address(acpi_lapic_addr);
1032
1033 return count;
1034}
1035
1036static int __init acpi_parse_madt_lapic_entries(void)
1037{
1038 int count;
1039 int x2count = 0;
1040 int ret;
1041 struct acpi_subtable_proc madt_proc[2];
1042
1043 if (!boot_cpu_has(X86_FEATURE_APIC))
1044 return -ENODEV;
1045
1046 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1047 acpi_parse_sapic, MAX_LOCAL_APIC);
1048
1049 if (!count) {
1050 memset(madt_proc, 0, sizeof(madt_proc));
1051 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1052 madt_proc[0].handler = acpi_parse_lapic;
1053 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1054 madt_proc[1].handler = acpi_parse_x2apic;
1055 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1056 sizeof(struct acpi_table_madt),
1057 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1058 if (ret < 0) {
1059 printk(KERN_ERR PREFIX
1060 "Error parsing LAPIC/X2APIC entries\n");
1061 return ret;
1062 }
1063
1064 count = madt_proc[0].count;
1065 x2count = madt_proc[1].count;
1066 }
1067 if (!count && !x2count) {
1068 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1069 /* TBD: Cleanup to allow fallback to MPS */
1070 return -ENODEV;
1071 } else if (count < 0 || x2count < 0) {
1072 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1073 /* TBD: Cleanup to allow fallback to MPS */
1074 return count;
1075 }
1076
1077 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1078 acpi_parse_x2apic_nmi, 0);
1079 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1080 acpi_parse_lapic_nmi, 0);
1081 if (count < 0 || x2count < 0) {
1082 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1083 /* TBD: Cleanup to allow fallback to MPS */
1084 return count;
1085 }
1086 return 0;
1087}
1088#endif /* CONFIG_X86_LOCAL_APIC */
1089
1090#ifdef CONFIG_X86_IO_APIC
1091static void __init mp_config_acpi_legacy_irqs(void)
1092{
1093 int i;
1094 struct mpc_intsrc mp_irq;
1095
1096#ifdef CONFIG_EISA
1097 /*
1098 * Fabricate the legacy ISA bus (bus #31).
1099 */
1100 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1101#endif
1102 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1103 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1104
1105 /*
1106 * Use the default configuration for the IRQs 0-15. Unless
1107 * overridden by (MADT) interrupt source override entries.
1108 */
1109 for (i = 0; i < nr_legacy_irqs(); i++) {
1110 int ioapic, pin;
1111 unsigned int dstapic;
1112 int idx;
1113 u32 gsi;
1114
1115 /* Locate the gsi that irq i maps to. */
1116 if (acpi_isa_irq_to_gsi(i, &gsi))
1117 continue;
1118
1119 /*
1120 * Locate the IOAPIC that manages the ISA IRQ.
1121 */
1122 ioapic = mp_find_ioapic(gsi);
1123 if (ioapic < 0)
1124 continue;
1125 pin = mp_find_ioapic_pin(ioapic, gsi);
1126 dstapic = mpc_ioapic_id(ioapic);
1127
1128 for (idx = 0; idx < mp_irq_entries; idx++) {
1129 struct mpc_intsrc *irq = mp_irqs + idx;
1130
1131 /* Do we already have a mapping for this ISA IRQ? */
1132 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1133 break;
1134
1135 /* Do we already have a mapping for this IOAPIC pin */
1136 if (irq->dstapic == dstapic && irq->dstirq == pin)
1137 break;
1138 }
1139
1140 if (idx != mp_irq_entries) {
1141 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1142 continue; /* IRQ already used */
1143 }
1144
1145 mp_irq.type = MP_INTSRC;
1146 mp_irq.irqflag = 0; /* Conforming */
1147 mp_irq.srcbus = MP_ISA_BUS;
1148 mp_irq.dstapic = dstapic;
1149 mp_irq.irqtype = mp_INT;
1150 mp_irq.srcbusirq = i; /* Identity mapped */
1151 mp_irq.dstirq = pin;
1152
1153 mp_save_irq(&mp_irq);
1154 }
1155}
1156
1157/*
1158 * Parse IOAPIC related entries in MADT
1159 * returns 0 on success, < 0 on error
1160 */
1161static int __init acpi_parse_madt_ioapic_entries(void)
1162{
1163 int count;
1164
1165 /*
1166 * ACPI interpreter is required to complete interrupt setup,
1167 * so if it is off, don't enumerate the io-apics with ACPI.
1168 * If MPS is present, it will handle them,
1169 * otherwise the system will stay in PIC mode
1170 */
1171 if (acpi_disabled || acpi_noirq)
1172 return -ENODEV;
1173
1174 if (!boot_cpu_has(X86_FEATURE_APIC))
1175 return -ENODEV;
1176
1177 /*
1178 * if "noapic" boot option, don't look for IO-APICs
1179 */
1180 if (skip_ioapic_setup) {
1181 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1182 "due to 'noapic' option.\n");
1183 return -ENODEV;
1184 }
1185
1186 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1187 MAX_IO_APICS);
1188 if (!count) {
1189 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1190 return -ENODEV;
1191 } else if (count < 0) {
1192 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1193 return count;
1194 }
1195
1196 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1197 acpi_parse_int_src_ovr, nr_irqs);
1198 if (count < 0) {
1199 printk(KERN_ERR PREFIX
1200 "Error parsing interrupt source overrides entry\n");
1201 /* TBD: Cleanup to allow fallback to MPS */
1202 return count;
1203 }
1204
1205 /*
1206 * If BIOS did not supply an INT_SRC_OVR for the SCI
1207 * pretend we got one so we can set the SCI flags.
1208 * But ignore setting up SCI on hardware reduced platforms.
1209 */
1210 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1211 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1212 acpi_gbl_FADT.sci_interrupt);
1213
1214 /* Fill in identity legacy mappings where no override */
1215 mp_config_acpi_legacy_irqs();
1216
1217 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1218 acpi_parse_nmi_src, nr_irqs);
1219 if (count < 0) {
1220 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1221 /* TBD: Cleanup to allow fallback to MPS */
1222 return count;
1223 }
1224
1225 return 0;
1226}
1227#else
1228static inline int acpi_parse_madt_ioapic_entries(void)
1229{
1230 return -1;
1231}
1232#endif /* !CONFIG_X86_IO_APIC */
1233
1234static void __init early_acpi_process_madt(void)
1235{
1236#ifdef CONFIG_X86_LOCAL_APIC
1237 int error;
1238
1239 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1240
1241 /*
1242 * Parse MADT LAPIC entries
1243 */
1244 error = early_acpi_parse_madt_lapic_addr_ovr();
1245 if (!error) {
1246 acpi_lapic = 1;
1247 smp_found_config = 1;
1248 }
1249 if (error == -EINVAL) {
1250 /*
1251 * Dell Precision Workstation 410, 610 come here.
1252 */
1253 printk(KERN_ERR PREFIX
1254 "Invalid BIOS MADT, disabling ACPI\n");
1255 disable_acpi();
1256 }
1257 }
1258#endif
1259}
1260
1261static void __init acpi_process_madt(void)
1262{
1263#ifdef CONFIG_X86_LOCAL_APIC
1264 int error;
1265
1266 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1267
1268 /*
1269 * Parse MADT LAPIC entries
1270 */
1271 error = acpi_parse_madt_lapic_entries();
1272 if (!error) {
1273 acpi_lapic = 1;
1274
1275 /*
1276 * Parse MADT IO-APIC entries
1277 */
1278 mutex_lock(&acpi_ioapic_lock);
1279 error = acpi_parse_madt_ioapic_entries();
1280 mutex_unlock(&acpi_ioapic_lock);
1281 if (!error) {
1282 acpi_set_irq_model_ioapic();
1283
1284 smp_found_config = 1;
1285 }
1286 }
1287 if (error == -EINVAL) {
1288 /*
1289 * Dell Precision Workstation 410, 610 come here.
1290 */
1291 printk(KERN_ERR PREFIX
1292 "Invalid BIOS MADT, disabling ACPI\n");
1293 disable_acpi();
1294 }
1295 } else {
1296 /*
1297 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1298 * In the event an MPS table was found, forget it.
1299 * Boot with "acpi=off" to use MPS on such a system.
1300 */
1301 if (smp_found_config) {
1302 printk(KERN_WARNING PREFIX
1303 "No APIC-table, disabling MPS\n");
1304 smp_found_config = 0;
1305 }
1306 }
1307
1308 /*
1309 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1310 * processors, where MPS only supports physical.
1311 */
1312 if (acpi_lapic && acpi_ioapic)
1313 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1314 "information\n");
1315 else if (acpi_lapic)
1316 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1317 "configuration information\n");
1318#endif
1319 return;
1320}
1321
1322static int __init disable_acpi_irq(const struct dmi_system_id *d)
1323{
1324 if (!acpi_force) {
1325 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1326 d->ident);
1327 acpi_noirq_set();
1328 }
1329 return 0;
1330}
1331
1332static int __init disable_acpi_pci(const struct dmi_system_id *d)
1333{
1334 if (!acpi_force) {
1335 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1336 d->ident);
1337 acpi_disable_pci();
1338 }
1339 return 0;
1340}
1341
1342static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1343{
1344 if (!acpi_force) {
1345 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1346 disable_acpi();
1347 } else {
1348 printk(KERN_NOTICE
1349 "Warning: DMI blacklist says broken, but acpi forced\n");
1350 }
1351 return 0;
1352}
1353
1354/*
1355 * Force ignoring BIOS IRQ0 override
1356 */
1357static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1358{
1359 if (!acpi_skip_timer_override) {
1360 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1361 d->ident);
1362 acpi_skip_timer_override = 1;
1363 }
1364 return 0;
1365}
1366
1367/*
1368 * ACPI offers an alternative platform interface model that removes
1369 * ACPI hardware requirements for platforms that do not implement
1370 * the PC Architecture.
1371 *
1372 * We initialize the Hardware-reduced ACPI model here:
1373 */
1374void __init acpi_generic_reduced_hw_init(void)
1375{
1376 /*
1377 * Override x86_init functions and bypass legacy PIC in
1378 * hardware reduced ACPI mode.
1379 */
1380 x86_init.timers.timer_init = x86_init_noop;
1381 x86_init.irqs.pre_vector_init = x86_init_noop;
1382 legacy_pic = &null_legacy_pic;
1383}
1384
1385static void __init acpi_reduced_hw_init(void)
1386{
1387 if (acpi_gbl_reduced_hardware)
1388 x86_init.acpi.reduced_hw_early_init();
1389}
1390
1391/*
1392 * If your system is blacklisted here, but you find that acpi=force
1393 * works for you, please contact linux-acpi@vger.kernel.org
1394 */
1395static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1396 /*
1397 * Boxes that need ACPI disabled
1398 */
1399 {
1400 .callback = dmi_disable_acpi,
1401 .ident = "IBM Thinkpad",
1402 .matches = {
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1405 },
1406 },
1407
1408 /*
1409 * Boxes that need ACPI PCI IRQ routing disabled
1410 */
1411 {
1412 .callback = disable_acpi_irq,
1413 .ident = "ASUS A7V",
1414 .matches = {
1415 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1416 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1417 /* newer BIOS, Revision 1011, does work */
1418 DMI_MATCH(DMI_BIOS_VERSION,
1419 "ASUS A7V ACPI BIOS Revision 1007"),
1420 },
1421 },
1422 {
1423 /*
1424 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1425 * for LPC bridge, which is needed for the PCI
1426 * interrupt links to work. DSDT fix is in bug 5966.
1427 * 2645, 2646 model numbers are shared with 600/600E/600X
1428 */
1429 .callback = disable_acpi_irq,
1430 .ident = "IBM Thinkpad 600 Series 2645",
1431 .matches = {
1432 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1433 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1434 },
1435 },
1436 {
1437 .callback = disable_acpi_irq,
1438 .ident = "IBM Thinkpad 600 Series 2646",
1439 .matches = {
1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1441 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1442 },
1443 },
1444 /*
1445 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1446 */
1447 { /* _BBN 0 bug */
1448 .callback = disable_acpi_pci,
1449 .ident = "ASUS PR-DLS",
1450 .matches = {
1451 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1452 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1453 DMI_MATCH(DMI_BIOS_VERSION,
1454 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1455 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1456 },
1457 },
1458 {
1459 .callback = disable_acpi_pci,
1460 .ident = "Acer TravelMate 36x Laptop",
1461 .matches = {
1462 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1463 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1464 },
1465 },
1466 {}
1467};
1468
1469/* second table for DMI checks that should run after early-quirks */
1470static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1471 /*
1472 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1473 * which includes some code which overrides all temperature
1474 * trip points to 16C if the INTIN2 input of the I/O APIC
1475 * is enabled. This input is incorrectly designated the
1476 * ISA IRQ 0 via an interrupt source override even though
1477 * it is wired to the output of the master 8259A and INTIN0
1478 * is not connected at all. Force ignoring BIOS IRQ0
1479 * override in that cases.
1480 */
1481 {
1482 .callback = dmi_ignore_irq0_timer_override,
1483 .ident = "HP nx6115 laptop",
1484 .matches = {
1485 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1487 },
1488 },
1489 {
1490 .callback = dmi_ignore_irq0_timer_override,
1491 .ident = "HP NX6125 laptop",
1492 .matches = {
1493 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1494 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1495 },
1496 },
1497 {
1498 .callback = dmi_ignore_irq0_timer_override,
1499 .ident = "HP NX6325 laptop",
1500 .matches = {
1501 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1502 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1503 },
1504 },
1505 {
1506 .callback = dmi_ignore_irq0_timer_override,
1507 .ident = "HP 6715b laptop",
1508 .matches = {
1509 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1510 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1511 },
1512 },
1513 {
1514 .callback = dmi_ignore_irq0_timer_override,
1515 .ident = "FUJITSU SIEMENS",
1516 .matches = {
1517 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1518 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1519 },
1520 },
1521 {}
1522};
1523
1524/*
1525 * acpi_boot_table_init() and acpi_boot_init()
1526 * called from setup_arch(), always.
1527 * 1. checksums all tables
1528 * 2. enumerates lapics
1529 * 3. enumerates io-apics
1530 *
1531 * acpi_table_init() is separate to allow reading SRAT without
1532 * other side effects.
1533 *
1534 * side effects of acpi_boot_init:
1535 * acpi_lapic = 1 if LAPIC found
1536 * acpi_ioapic = 1 if IOAPIC found
1537 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1538 * if acpi_blacklisted() acpi_disabled = 1;
1539 * acpi_irq_model=...
1540 * ...
1541 */
1542
1543void __init acpi_boot_table_init(void)
1544{
1545 dmi_check_system(acpi_dmi_table);
1546
1547 /*
1548 * If acpi_disabled, bail out
1549 */
1550 if (acpi_disabled)
1551 return;
1552
1553 /*
1554 * Initialize the ACPI boot-time table parser.
1555 */
1556 if (acpi_table_init()) {
1557 disable_acpi();
1558 return;
1559 }
1560
1561 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1562
1563 /*
1564 * blacklist may disable ACPI entirely
1565 */
1566 if (acpi_blacklisted()) {
1567 if (acpi_force) {
1568 printk(KERN_WARNING PREFIX "acpi=force override\n");
1569 } else {
1570 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1571 disable_acpi();
1572 return;
1573 }
1574 }
1575}
1576
1577int __init early_acpi_boot_init(void)
1578{
1579 /*
1580 * If acpi_disabled, bail out
1581 */
1582 if (acpi_disabled)
1583 return 1;
1584
1585 /*
1586 * Process the Multiple APIC Description Table (MADT), if present
1587 */
1588 early_acpi_process_madt();
1589
1590 /*
1591 * Hardware-reduced ACPI mode initialization:
1592 */
1593 acpi_reduced_hw_init();
1594
1595 return 0;
1596}
1597
1598int __init acpi_boot_init(void)
1599{
1600 /* those are executed after early-quirks are executed */
1601 dmi_check_system(acpi_dmi_table_late);
1602
1603 /*
1604 * If acpi_disabled, bail out
1605 */
1606 if (acpi_disabled)
1607 return 1;
1608
1609 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1610
1611 /*
1612 * set sci_int and PM timer address
1613 */
1614 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1615
1616 /*
1617 * Process the Multiple APIC Description Table (MADT), if present
1618 */
1619 acpi_process_madt();
1620
1621 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1622 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1623 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1624
1625 if (!acpi_noirq)
1626 x86_init.pci.init = pci_acpi_init;
1627
1628 /* Do not enable ACPI SPCR console by default */
1629 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1630 return 0;
1631}
1632
1633static int __init parse_acpi(char *arg)
1634{
1635 if (!arg)
1636 return -EINVAL;
1637
1638 /* "acpi=off" disables both ACPI table parsing and interpreter */
1639 if (strcmp(arg, "off") == 0) {
1640 disable_acpi();
1641 }
1642 /* acpi=force to over-ride black-list */
1643 else if (strcmp(arg, "force") == 0) {
1644 acpi_force = 1;
1645 acpi_disabled = 0;
1646 }
1647 /* acpi=strict disables out-of-spec workarounds */
1648 else if (strcmp(arg, "strict") == 0) {
1649 acpi_strict = 1;
1650 }
1651 /* acpi=rsdt use RSDT instead of XSDT */
1652 else if (strcmp(arg, "rsdt") == 0) {
1653 acpi_gbl_do_not_use_xsdt = TRUE;
1654 }
1655 /* "acpi=noirq" disables ACPI interrupt routing */
1656 else if (strcmp(arg, "noirq") == 0) {
1657 acpi_noirq_set();
1658 }
1659 /* "acpi=copy_dsdt" copys DSDT */
1660 else if (strcmp(arg, "copy_dsdt") == 0) {
1661 acpi_gbl_copy_dsdt_locally = 1;
1662 }
1663 /* "acpi=nocmcff" disables FF mode for corrected errors */
1664 else if (strcmp(arg, "nocmcff") == 0) {
1665 acpi_disable_cmcff = 1;
1666 } else {
1667 /* Core will printk when we return error. */
1668 return -EINVAL;
1669 }
1670 return 0;
1671}
1672early_param("acpi", parse_acpi);
1673
1674/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1675static int __init parse_pci(char *arg)
1676{
1677 if (arg && strcmp(arg, "noacpi") == 0)
1678 acpi_disable_pci();
1679 return 0;
1680}
1681early_param("pci", parse_pci);
1682
1683int __init acpi_mps_check(void)
1684{
1685#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1686/* mptable code is not built-in*/
1687 if (acpi_disabled || acpi_noirq) {
1688 printk(KERN_WARNING "MPS support code is not built-in.\n"
1689 "Using acpi=off or acpi=noirq or pci=noacpi "
1690 "may have problem\n");
1691 return 1;
1692 }
1693#endif
1694 return 0;
1695}
1696
1697#ifdef CONFIG_X86_IO_APIC
1698static int __init parse_acpi_skip_timer_override(char *arg)
1699{
1700 acpi_skip_timer_override = 1;
1701 return 0;
1702}
1703early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1704
1705static int __init parse_acpi_use_timer_override(char *arg)
1706{
1707 acpi_use_timer_override = 1;
1708 return 0;
1709}
1710early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1711#endif /* CONFIG_X86_IO_APIC */
1712
1713static int __init setup_acpi_sci(char *s)
1714{
1715 if (!s)
1716 return -EINVAL;
1717 if (!strcmp(s, "edge"))
1718 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1719 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1720 else if (!strcmp(s, "level"))
1721 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1722 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1723 else if (!strcmp(s, "high"))
1724 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1725 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1726 else if (!strcmp(s, "low"))
1727 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1728 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1729 else
1730 return -EINVAL;
1731 return 0;
1732}
1733early_param("acpi_sci", setup_acpi_sci);
1734
1735int __acpi_acquire_global_lock(unsigned int *lock)
1736{
1737 unsigned int old, new, val;
1738 do {
1739 old = *lock;
1740 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1741 val = cmpxchg(lock, old, new);
1742 } while (unlikely (val != old));
1743 return (new < 3) ? -1 : 0;
1744}
1745
1746int __acpi_release_global_lock(unsigned int *lock)
1747{
1748 unsigned int old, new, val;
1749 do {
1750 old = *lock;
1751 new = old & ~0x3;
1752 val = cmpxchg(lock, old, new);
1753 } while (unlikely (val != old));
1754 return old & 0x1;
1755}
1756
1757void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1758{
1759 e820__range_add(addr, size, E820_TYPE_ACPI);
1760 e820__update_table_print();
1761}
1762
1763void x86_default_set_root_pointer(u64 addr)
1764{
1765 boot_params.acpi_rsdp_addr = addr;
1766}
1767
1768u64 x86_default_get_root_pointer(void)
1769{
1770 return boot_params.acpi_rsdp_addr;
1771}
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 */
38static int __initdata acpi_force = 0;
39int acpi_disabled;
40EXPORT_SYMBOL(acpi_disabled);
41
42#ifdef CONFIG_X86_64
43# include <asm/proto.h>
44#endif /* X86 */
45
46int acpi_noirq; /* skip ACPI IRQ initialization */
47static int acpi_nobgrt; /* skip ACPI BGRT */
48int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
49EXPORT_SYMBOL(acpi_pci_disabled);
50
51int acpi_lapic;
52int acpi_ioapic;
53int acpi_strict;
54int acpi_disable_cmcff;
55bool acpi_int_src_ovr[NR_IRQS_LEGACY];
56
57/* ACPI SCI override configuration */
58u8 acpi_sci_flags __initdata;
59u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
60int acpi_skip_timer_override __initdata;
61int acpi_use_timer_override __initdata;
62int acpi_fix_pin2_polarity __initdata;
63
64#ifdef CONFIG_X86_LOCAL_APIC
65static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
66static bool has_lapic_cpus __initdata;
67static bool acpi_support_online_capable;
68#endif
69
70#ifdef CONFIG_X86_64
71/* Physical address of the Multiprocessor Wakeup Structure mailbox */
72static u64 acpi_mp_wake_mailbox_paddr;
73/* Virtual address of the Multiprocessor Wakeup Structure mailbox */
74static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox;
75#endif
76
77#ifdef CONFIG_X86_IO_APIC
78/*
79 * Locks related to IOAPIC hotplug
80 * Hotplug side:
81 * ->device_hotplug_lock
82 * ->acpi_ioapic_lock
83 * ->ioapic_lock
84 * Interrupt mapping side:
85 * ->acpi_ioapic_lock
86 * ->ioapic_mutex
87 * ->ioapic_lock
88 */
89static DEFINE_MUTEX(acpi_ioapic_lock);
90#endif
91
92/* --------------------------------------------------------------------------
93 Boot-time Configuration
94 -------------------------------------------------------------------------- */
95
96/*
97 * The default interrupt routing model is PIC (8259). This gets
98 * overridden if IOAPICs are enumerated (below).
99 */
100enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
101
102
103/*
104 * ISA irqs by default are the first 16 gsis but can be
105 * any gsi as specified by an interrupt source override.
106 */
107static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
109};
110
111/*
112 * This is just a simple wrapper around early_memremap(),
113 * with sanity checks for phys == 0 and size == 0.
114 */
115void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
116{
117
118 if (!phys || !size)
119 return NULL;
120
121 return early_memremap(phys, size);
122}
123
124void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
125{
126 if (!map || !size)
127 return;
128
129 early_memunmap(map, size);
130}
131
132#ifdef CONFIG_X86_LOCAL_APIC
133static int __init acpi_parse_madt(struct acpi_table_header *table)
134{
135 struct acpi_table_madt *madt = NULL;
136
137 if (!boot_cpu_has(X86_FEATURE_APIC))
138 return -EINVAL;
139
140 madt = (struct acpi_table_madt *)table;
141 if (!madt) {
142 pr_warn("Unable to map MADT\n");
143 return -ENODEV;
144 }
145
146 if (madt->address) {
147 acpi_lapic_addr = (u64) madt->address;
148
149 pr_debug("Local APIC address 0x%08x\n", madt->address);
150 }
151
152 if (madt->flags & ACPI_MADT_PCAT_COMPAT)
153 legacy_pic_pcat_compat();
154
155 /* ACPI 6.3 and newer support the online capable bit. */
156 if (acpi_gbl_FADT.header.revision > 6 ||
157 (acpi_gbl_FADT.header.revision == 6 &&
158 acpi_gbl_FADT.minor_revision >= 3))
159 acpi_support_online_capable = true;
160
161 default_acpi_madt_oem_check(madt->header.oem_id,
162 madt->header.oem_table_id);
163
164 return 0;
165}
166
167static bool __init acpi_is_processor_usable(u32 lapic_flags)
168{
169 if (lapic_flags & ACPI_MADT_ENABLED)
170 return true;
171
172 if (!acpi_support_online_capable ||
173 (lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
174 return true;
175
176 return false;
177}
178
179static int __init
180acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
181{
182 struct acpi_madt_local_x2apic *processor = NULL;
183#ifdef CONFIG_X86_X2APIC
184 u32 apic_id;
185 u8 enabled;
186#endif
187
188 processor = (struct acpi_madt_local_x2apic *)header;
189
190 if (BAD_MADT_ENTRY(processor, end))
191 return -EINVAL;
192
193 acpi_table_print_madt_entry(&header->common);
194
195#ifdef CONFIG_X86_X2APIC
196 apic_id = processor->local_apic_id;
197 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
198
199 /* Ignore invalid ID */
200 if (apic_id == 0xffffffff)
201 return 0;
202
203 /* don't register processors that cannot be onlined */
204 if (!acpi_is_processor_usable(processor->lapic_flags))
205 return 0;
206
207 /*
208 * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure
209 * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID
210 * in x2APIC must be equal or greater than 0xff.
211 */
212 if (has_lapic_cpus && apic_id < 0xff)
213 return 0;
214
215 /*
216 * We need to register disabled CPU as well to permit
217 * counting disabled CPUs. This allows us to size
218 * cpus_possible_map more accurately, to permit
219 * to not preallocating memory for all NR_CPUS
220 * when we use CPU hotplug.
221 */
222 if (!apic_id_valid(apic_id)) {
223 if (enabled)
224 pr_warn("x2apic entry ignored\n");
225 return 0;
226 }
227
228 topology_register_apic(apic_id, processor->uid, enabled);
229#else
230 pr_warn("x2apic entry ignored\n");
231#endif
232
233 return 0;
234}
235
236static int __init
237acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
238{
239 struct acpi_madt_local_apic *processor = NULL;
240
241 processor = (struct acpi_madt_local_apic *)header;
242
243 if (BAD_MADT_ENTRY(processor, end))
244 return -EINVAL;
245
246 acpi_table_print_madt_entry(&header->common);
247
248 /* Ignore invalid ID */
249 if (processor->id == 0xff)
250 return 0;
251
252 /* don't register processors that can not be onlined */
253 if (!acpi_is_processor_usable(processor->lapic_flags))
254 return 0;
255
256 /*
257 * We need to register disabled CPU as well to permit
258 * counting disabled CPUs. This allows us to size
259 * cpus_possible_map more accurately, to permit
260 * to not preallocating memory for all NR_CPUS
261 * when we use CPU hotplug.
262 */
263 topology_register_apic(processor->id, /* APIC ID */
264 processor->processor_id, /* ACPI ID */
265 processor->lapic_flags & ACPI_MADT_ENABLED);
266
267 has_lapic_cpus = true;
268 return 0;
269}
270
271static int __init
272acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
273{
274 struct acpi_madt_local_sapic *processor = NULL;
275
276 processor = (struct acpi_madt_local_sapic *)header;
277
278 if (BAD_MADT_ENTRY(processor, end))
279 return -EINVAL;
280
281 acpi_table_print_madt_entry(&header->common);
282
283 topology_register_apic((processor->id << 8) | processor->eid,/* APIC ID */
284 processor->processor_id, /* ACPI ID */
285 processor->lapic_flags & ACPI_MADT_ENABLED);
286
287 return 0;
288}
289
290static int __init
291acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
292 const unsigned long end)
293{
294 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
295
296 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
297
298 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
299 return -EINVAL;
300
301 acpi_table_print_madt_entry(&header->common);
302
303 acpi_lapic_addr = lapic_addr_ovr->address;
304
305 return 0;
306}
307
308static int __init
309acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
310 const unsigned long end)
311{
312 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
313
314 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
315
316 if (BAD_MADT_ENTRY(x2apic_nmi, end))
317 return -EINVAL;
318
319 acpi_table_print_madt_entry(&header->common);
320
321 if (x2apic_nmi->lint != 1)
322 pr_warn("NMI not connected to LINT 1!\n");
323
324 return 0;
325}
326
327static int __init
328acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
329{
330 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
331
332 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
333
334 if (BAD_MADT_ENTRY(lapic_nmi, end))
335 return -EINVAL;
336
337 acpi_table_print_madt_entry(&header->common);
338
339 if (lapic_nmi->lint != 1)
340 pr_warn("NMI not connected to LINT 1!\n");
341
342 return 0;
343}
344
345#ifdef CONFIG_X86_64
346static int acpi_wakeup_cpu(u32 apicid, unsigned long start_ip)
347{
348 /*
349 * Remap mailbox memory only for the first call to acpi_wakeup_cpu().
350 *
351 * Wakeup of secondary CPUs is fully serialized in the core code.
352 * No need to protect acpi_mp_wake_mailbox from concurrent accesses.
353 */
354 if (!acpi_mp_wake_mailbox) {
355 acpi_mp_wake_mailbox = memremap(acpi_mp_wake_mailbox_paddr,
356 sizeof(*acpi_mp_wake_mailbox),
357 MEMREMAP_WB);
358 }
359
360 /*
361 * Mailbox memory is shared between the firmware and OS. Firmware will
362 * listen on mailbox command address, and once it receives the wakeup
363 * command, the CPU associated with the given apicid will be booted.
364 *
365 * The value of 'apic_id' and 'wakeup_vector' must be visible to the
366 * firmware before the wakeup command is visible. smp_store_release()
367 * ensures ordering and visibility.
368 */
369 acpi_mp_wake_mailbox->apic_id = apicid;
370 acpi_mp_wake_mailbox->wakeup_vector = start_ip;
371 smp_store_release(&acpi_mp_wake_mailbox->command,
372 ACPI_MP_WAKE_COMMAND_WAKEUP);
373
374 /*
375 * Wait for the CPU to wake up.
376 *
377 * The CPU being woken up is essentially in a spin loop waiting to be
378 * woken up. It should not take long for it wake up and acknowledge by
379 * zeroing out ->command.
380 *
381 * ACPI specification doesn't provide any guidance on how long kernel
382 * has to wait for a wake up acknowledgement. It also doesn't provide
383 * a way to cancel a wake up request if it takes too long.
384 *
385 * In TDX environment, the VMM has control over how long it takes to
386 * wake up secondary. It can postpone scheduling secondary vCPU
387 * indefinitely. Giving up on wake up request and reporting error opens
388 * possible attack vector for VMM: it can wake up a secondary CPU when
389 * kernel doesn't expect it. Wait until positive result of the wake up
390 * request.
391 */
392 while (READ_ONCE(acpi_mp_wake_mailbox->command))
393 cpu_relax();
394
395 return 0;
396}
397#endif /* CONFIG_X86_64 */
398#endif /* CONFIG_X86_LOCAL_APIC */
399
400#ifdef CONFIG_X86_IO_APIC
401#define MP_ISA_BUS 0
402
403static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
404 u8 trigger, u32 gsi);
405
406static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
407 u32 gsi)
408{
409 /*
410 * Check bus_irq boundary.
411 */
412 if (bus_irq >= NR_IRQS_LEGACY) {
413 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
414 return;
415 }
416
417 /*
418 * TBD: This check is for faulty timer entries, where the override
419 * erroneously sets the trigger to level, resulting in a HUGE
420 * increase of timer interrupts!
421 */
422 if ((bus_irq == 0) && (trigger == 3))
423 trigger = 1;
424
425 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
426 return;
427 /*
428 * Reset default identity mapping if gsi is also an legacy IRQ,
429 * otherwise there will be more than one entry with the same GSI
430 * and acpi_isa_irq_to_gsi() may give wrong result.
431 */
432 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
433 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
434 isa_irq_to_gsi[bus_irq] = gsi;
435}
436
437static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
438 int polarity)
439{
440#ifdef CONFIG_X86_MPPARSE
441 struct mpc_intsrc mp_irq;
442 struct pci_dev *pdev;
443 unsigned char number;
444 unsigned int devfn;
445 int ioapic;
446 u8 pin;
447
448 if (!acpi_ioapic)
449 return;
450 if (!dev || !dev_is_pci(dev))
451 return;
452
453 pdev = to_pci_dev(dev);
454 number = pdev->bus->number;
455 devfn = pdev->devfn;
456 pin = pdev->pin;
457 /* print the entry should happen on mptable identically */
458 mp_irq.type = MP_INTSRC;
459 mp_irq.irqtype = mp_INT;
460 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
461 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
462 mp_irq.srcbus = number;
463 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
464 ioapic = mp_find_ioapic(gsi);
465 mp_irq.dstapic = mpc_ioapic_id(ioapic);
466 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
467
468 mp_save_irq(&mp_irq);
469#endif
470}
471
472static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
473 u8 trigger, u32 gsi)
474{
475 struct mpc_intsrc mp_irq;
476 int ioapic, pin;
477
478 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
479 ioapic = mp_find_ioapic(gsi);
480 if (ioapic < 0) {
481 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
482 return ioapic;
483 }
484
485 pin = mp_find_ioapic_pin(ioapic, gsi);
486
487 mp_irq.type = MP_INTSRC;
488 mp_irq.irqtype = mp_INT;
489 mp_irq.irqflag = (trigger << 2) | polarity;
490 mp_irq.srcbus = MP_ISA_BUS;
491 mp_irq.srcbusirq = bus_irq;
492 mp_irq.dstapic = mpc_ioapic_id(ioapic);
493 mp_irq.dstirq = pin;
494
495 mp_save_irq(&mp_irq);
496
497 return 0;
498}
499
500static int __init
501acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
502{
503 struct acpi_madt_io_apic *ioapic = NULL;
504 struct ioapic_domain_cfg cfg = {
505 .type = IOAPIC_DOMAIN_DYNAMIC,
506 .ops = &mp_ioapic_irqdomain_ops,
507 };
508
509 ioapic = (struct acpi_madt_io_apic *)header;
510
511 if (BAD_MADT_ENTRY(ioapic, end))
512 return -EINVAL;
513
514 acpi_table_print_madt_entry(&header->common);
515
516 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
517 if (ioapic->global_irq_base < nr_legacy_irqs())
518 cfg.type = IOAPIC_DOMAIN_LEGACY;
519
520 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
521 &cfg);
522
523 return 0;
524}
525
526/*
527 * Parse Interrupt Source Override for the ACPI SCI
528 */
529static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
530{
531 if (trigger == 0) /* compatible SCI trigger is level */
532 trigger = 3;
533
534 if (polarity == 0) /* compatible SCI polarity is low */
535 polarity = 3;
536
537 /* Command-line over-ride via acpi_sci= */
538 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
539 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
540
541 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
542 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
543
544 if (bus_irq < NR_IRQS_LEGACY)
545 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
546 else
547 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
548
549 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
550
551 /*
552 * stash over-ride to indicate we've been here
553 * and for later update of acpi_gbl_FADT
554 */
555 acpi_sci_override_gsi = gsi;
556 return;
557}
558
559static int __init
560acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
561 const unsigned long end)
562{
563 struct acpi_madt_interrupt_override *intsrc = NULL;
564
565 intsrc = (struct acpi_madt_interrupt_override *)header;
566
567 if (BAD_MADT_ENTRY(intsrc, end))
568 return -EINVAL;
569
570 acpi_table_print_madt_entry(&header->common);
571
572 if (intsrc->source_irq < NR_IRQS_LEGACY)
573 acpi_int_src_ovr[intsrc->source_irq] = true;
574
575 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
576 acpi_sci_ioapic_setup(intsrc->source_irq,
577 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
578 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
579 intsrc->global_irq);
580 return 0;
581 }
582
583 if (intsrc->source_irq == 0) {
584 if (acpi_skip_timer_override) {
585 pr_warn("BIOS IRQ0 override ignored.\n");
586 return 0;
587 }
588
589 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
590 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
591 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
592 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
593 }
594 }
595
596 mp_override_legacy_irq(intsrc->source_irq,
597 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
598 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
599 intsrc->global_irq);
600
601 return 0;
602}
603
604static int __init
605acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
606{
607 struct acpi_madt_nmi_source *nmi_src = NULL;
608
609 nmi_src = (struct acpi_madt_nmi_source *)header;
610
611 if (BAD_MADT_ENTRY(nmi_src, end))
612 return -EINVAL;
613
614 acpi_table_print_madt_entry(&header->common);
615
616 /* TBD: Support nimsrc entries? */
617
618 return 0;
619}
620
621#endif /* CONFIG_X86_IO_APIC */
622
623/*
624 * acpi_pic_sci_set_trigger()
625 *
626 * use ELCR to set PIC-mode trigger type for SCI
627 *
628 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
629 * it may require Edge Trigger -- use "acpi_sci=edge"
630 *
631 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers
632 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
633 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
634 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
635 */
636
637void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
638{
639 unsigned int mask = 1 << irq;
640 unsigned int old, new;
641
642 /* Real old ELCR mask */
643 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
644
645 /*
646 * If we use ACPI to set PCI IRQs, then we should clear ELCR
647 * since we will set it correctly as we enable the PCI irq
648 * routing.
649 */
650 new = acpi_noirq ? old : 0;
651
652 /*
653 * Update SCI information in the ELCR, it isn't in the PCI
654 * routing tables..
655 */
656 switch (trigger) {
657 case 1: /* Edge - clear */
658 new &= ~mask;
659 break;
660 case 3: /* Level - set */
661 new |= mask;
662 break;
663 }
664
665 if (old == new)
666 return;
667
668 pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
669 outb(new, PIC_ELCR1);
670 outb(new >> 8, PIC_ELCR2);
671}
672
673int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
674{
675 int rc, irq, trigger, polarity;
676
677 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
678 *irqp = gsi;
679 return 0;
680 }
681
682 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
683 if (rc)
684 return rc;
685
686 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
687 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
688 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
689 if (irq < 0)
690 return irq;
691
692 *irqp = irq;
693 return 0;
694}
695EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
696
697int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
698{
699 if (isa_irq < nr_legacy_irqs() &&
700 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
701 *gsi = isa_irq_to_gsi[isa_irq];
702 return 0;
703 }
704
705 return -1;
706}
707
708static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
709 int trigger, int polarity)
710{
711#ifdef CONFIG_PCI
712 /*
713 * Make sure all (legacy) PCI IRQs are set as level-triggered.
714 */
715 if (trigger == ACPI_LEVEL_SENSITIVE)
716 elcr_set_level_irq(gsi);
717#endif
718
719 return gsi;
720}
721
722#ifdef CONFIG_X86_LOCAL_APIC
723static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
724 int trigger, int polarity)
725{
726 int irq = gsi;
727#ifdef CONFIG_X86_IO_APIC
728 int node;
729 struct irq_alloc_info info;
730
731 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
732 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
733 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
734 ioapic_set_alloc_attr(&info, node, trigger, polarity);
735
736 mutex_lock(&acpi_ioapic_lock);
737 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
738 /* Don't set up the ACPI SCI because it's already set up */
739 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
740 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
741 mutex_unlock(&acpi_ioapic_lock);
742#endif
743
744 return irq;
745}
746
747static void acpi_unregister_gsi_ioapic(u32 gsi)
748{
749#ifdef CONFIG_X86_IO_APIC
750 int irq;
751
752 mutex_lock(&acpi_ioapic_lock);
753 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
754 if (irq > 0)
755 mp_unmap_irq(irq);
756 mutex_unlock(&acpi_ioapic_lock);
757#endif
758}
759#endif
760
761int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
762 int trigger, int polarity) = acpi_register_gsi_pic;
763void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
764
765#ifdef CONFIG_ACPI_SLEEP
766int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
767#else
768int (*acpi_suspend_lowlevel)(void);
769#endif
770
771/*
772 * success: return IRQ number (>=0)
773 * failure: return < 0
774 */
775int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
776{
777 return __acpi_register_gsi(dev, gsi, trigger, polarity);
778}
779EXPORT_SYMBOL_GPL(acpi_register_gsi);
780
781void acpi_unregister_gsi(u32 gsi)
782{
783 if (__acpi_unregister_gsi)
784 __acpi_unregister_gsi(gsi);
785}
786EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
787
788#ifdef CONFIG_X86_LOCAL_APIC
789static void __init acpi_set_irq_model_ioapic(void)
790{
791 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
792 __acpi_register_gsi = acpi_register_gsi_ioapic;
793 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
794 acpi_ioapic = 1;
795}
796#endif
797
798/*
799 * ACPI based hotplug support for CPU
800 */
801#ifdef CONFIG_ACPI_HOTPLUG_CPU
802#include <acpi/processor.h>
803
804static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
805{
806#ifdef CONFIG_ACPI_NUMA
807 int nid;
808
809 nid = acpi_get_node(handle);
810 if (nid != NUMA_NO_NODE) {
811 set_apicid_to_node(physid, nid);
812 numa_set_node(cpu, nid);
813 }
814#endif
815 return 0;
816}
817
818int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu)
819{
820 int cpu = topology_hotplug_apic(physid, acpi_id);
821
822 if (cpu < 0) {
823 pr_info("Unable to map lapic to logical cpu number\n");
824 return cpu;
825 }
826
827 acpi_processor_set_pdc(handle);
828 acpi_map_cpu2node(handle, cpu, physid);
829
830 *pcpu = cpu;
831 return 0;
832}
833EXPORT_SYMBOL(acpi_map_cpu);
834
835int acpi_unmap_cpu(int cpu)
836{
837#ifdef CONFIG_ACPI_NUMA
838 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
839#endif
840 topology_hotunplug_apic(cpu);
841 return 0;
842}
843EXPORT_SYMBOL(acpi_unmap_cpu);
844#endif /* CONFIG_ACPI_HOTPLUG_CPU */
845
846int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
847{
848 int ret = -ENOSYS;
849#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
850 int ioapic_id;
851 u64 addr;
852 struct ioapic_domain_cfg cfg = {
853 .type = IOAPIC_DOMAIN_DYNAMIC,
854 .ops = &mp_ioapic_irqdomain_ops,
855 };
856
857 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
858 if (ioapic_id < 0) {
859 unsigned long long uid;
860 acpi_status status;
861
862 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
863 NULL, &uid);
864 if (ACPI_FAILURE(status)) {
865 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
866 return -EINVAL;
867 }
868 ioapic_id = (int)uid;
869 }
870
871 mutex_lock(&acpi_ioapic_lock);
872 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
873 mutex_unlock(&acpi_ioapic_lock);
874#endif
875
876 return ret;
877}
878EXPORT_SYMBOL(acpi_register_ioapic);
879
880int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
881{
882 int ret = -ENOSYS;
883
884#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
885 mutex_lock(&acpi_ioapic_lock);
886 ret = mp_unregister_ioapic(gsi_base);
887 mutex_unlock(&acpi_ioapic_lock);
888#endif
889
890 return ret;
891}
892EXPORT_SYMBOL(acpi_unregister_ioapic);
893
894/**
895 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base
896 * has been registered
897 * @handle: ACPI handle of the IOAPIC device
898 * @gsi_base: GSI base associated with the IOAPIC
899 *
900 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
901 * with acpi_register_ioapic()/acpi_unregister_ioapic().
902 */
903int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
904{
905 int ret = 0;
906
907#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
908 mutex_lock(&acpi_ioapic_lock);
909 ret = mp_ioapic_registered(gsi_base);
910 mutex_unlock(&acpi_ioapic_lock);
911#endif
912
913 return ret;
914}
915
916static int __init acpi_parse_sbf(struct acpi_table_header *table)
917{
918 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
919
920 sbf_port = sb->cmos_index; /* Save CMOS port */
921
922 return 0;
923}
924
925#ifdef CONFIG_HPET_TIMER
926#include <asm/hpet.h>
927
928static struct resource *hpet_res __initdata;
929
930static int __init acpi_parse_hpet(struct acpi_table_header *table)
931{
932 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
933
934 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
935 pr_warn("HPET timers must be located in memory.\n");
936 return -1;
937 }
938
939 hpet_address = hpet_tbl->address.address;
940 hpet_blockid = hpet_tbl->sequence;
941
942 /*
943 * Some broken BIOSes advertise HPET at 0x0. We really do not
944 * want to allocate a resource there.
945 */
946 if (!hpet_address) {
947 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address);
948 return 0;
949 }
950#ifdef CONFIG_X86_64
951 /*
952 * Some even more broken BIOSes advertise HPET at
953 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
954 * some noise:
955 */
956 if (hpet_address == 0xfed0000000000000UL) {
957 if (!hpet_force_user) {
958 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n",
959 hpet_tbl->id);
960 hpet_address = 0;
961 return 0;
962 }
963 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n",
964 hpet_tbl->id);
965 hpet_address >>= 32;
966 }
967#endif
968 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address);
969
970 /*
971 * Allocate and initialize the HPET firmware resource for adding into
972 * the resource tree during the lateinit timeframe.
973 */
974#define HPET_RESOURCE_NAME_SIZE 9
975 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
976 SMP_CACHE_BYTES);
977 if (!hpet_res)
978 panic("%s: Failed to allocate %zu bytes\n", __func__,
979 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
980
981 hpet_res->name = (void *)&hpet_res[1];
982 hpet_res->flags = IORESOURCE_MEM;
983 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
984 hpet_tbl->sequence);
985
986 hpet_res->start = hpet_address;
987 hpet_res->end = hpet_address + (1 * 1024) - 1;
988
989 return 0;
990}
991
992/*
993 * hpet_insert_resource inserts the HPET resources used into the resource
994 * tree.
995 */
996static __init int hpet_insert_resource(void)
997{
998 if (!hpet_res)
999 return 1;
1000
1001 return insert_resource(&iomem_resource, hpet_res);
1002}
1003
1004late_initcall(hpet_insert_resource);
1005
1006#else
1007#define acpi_parse_hpet NULL
1008#endif
1009
1010static int __init acpi_parse_fadt(struct acpi_table_header *table)
1011{
1012 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
1013 pr_debug("no legacy devices present\n");
1014 x86_platform.legacy.devices.pnpbios = 0;
1015 }
1016
1017 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
1018 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
1019 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
1020 pr_debug("i8042 controller is absent\n");
1021 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
1022 }
1023
1024 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
1025 pr_debug("not registering RTC platform device\n");
1026 x86_platform.legacy.rtc = 0;
1027 }
1028
1029 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
1030 pr_debug("probing for VGA not safe\n");
1031 x86_platform.legacy.no_vga = 1;
1032 }
1033
1034#ifdef CONFIG_X86_PM_TIMER
1035 /* detect the location of the ACPI PM Timer */
1036 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
1037 /* FADT rev. 2 */
1038 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
1039 ACPI_ADR_SPACE_SYSTEM_IO)
1040 return 0;
1041
1042 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
1043 /*
1044 * "X" fields are optional extensions to the original V1.0
1045 * fields, so we must selectively expand V1.0 fields if the
1046 * corresponding X field is zero.
1047 */
1048 if (!pmtmr_ioport)
1049 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1050 } else {
1051 /* FADT rev. 1 */
1052 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1053 }
1054 if (pmtmr_ioport)
1055 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport);
1056#endif
1057 return 0;
1058}
1059
1060#ifdef CONFIG_X86_LOCAL_APIC
1061/*
1062 * Parse LAPIC entries in MADT
1063 * returns 0 on success, < 0 on error
1064 */
1065
1066static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1067{
1068 int count;
1069
1070 if (!boot_cpu_has(X86_FEATURE_APIC))
1071 return -ENODEV;
1072
1073 /*
1074 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1075 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1076 */
1077
1078 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1079 acpi_parse_lapic_addr_ovr, 0);
1080 if (count < 0) {
1081 pr_err("Error parsing LAPIC address override entry\n");
1082 return count;
1083 }
1084
1085 register_lapic_address(acpi_lapic_addr);
1086
1087 return count;
1088}
1089
1090static int __init acpi_parse_madt_lapic_entries(void)
1091{
1092 int count, x2count = 0;
1093
1094 if (!boot_cpu_has(X86_FEATURE_APIC))
1095 return -ENODEV;
1096
1097 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1098 acpi_parse_sapic, MAX_LOCAL_APIC);
1099
1100 if (!count) {
1101 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
1102 acpi_parse_lapic, MAX_LOCAL_APIC);
1103 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
1104 acpi_parse_x2apic, MAX_LOCAL_APIC);
1105 }
1106 if (!count && !x2count) {
1107 pr_err("No LAPIC entries present\n");
1108 /* TBD: Cleanup to allow fallback to MPS */
1109 return -ENODEV;
1110 } else if (count < 0 || x2count < 0) {
1111 pr_err("Error parsing LAPIC entry\n");
1112 /* TBD: Cleanup to allow fallback to MPS */
1113 return count;
1114 }
1115
1116 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1117 acpi_parse_x2apic_nmi, 0);
1118 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1119 acpi_parse_lapic_nmi, 0);
1120 if (count < 0 || x2count < 0) {
1121 pr_err("Error parsing LAPIC NMI entry\n");
1122 /* TBD: Cleanup to allow fallback to MPS */
1123 return count;
1124 }
1125 return 0;
1126}
1127
1128#ifdef CONFIG_X86_64
1129static int __init acpi_parse_mp_wake(union acpi_subtable_headers *header,
1130 const unsigned long end)
1131{
1132 struct acpi_madt_multiproc_wakeup *mp_wake;
1133
1134 if (!IS_ENABLED(CONFIG_SMP))
1135 return -ENODEV;
1136
1137 mp_wake = (struct acpi_madt_multiproc_wakeup *)header;
1138 if (BAD_MADT_ENTRY(mp_wake, end))
1139 return -EINVAL;
1140
1141 acpi_table_print_madt_entry(&header->common);
1142
1143 acpi_mp_wake_mailbox_paddr = mp_wake->base_address;
1144
1145 apic_update_callback(wakeup_secondary_cpu_64, acpi_wakeup_cpu);
1146
1147 return 0;
1148}
1149#endif /* CONFIG_X86_64 */
1150#endif /* CONFIG_X86_LOCAL_APIC */
1151
1152#ifdef CONFIG_X86_IO_APIC
1153static void __init mp_config_acpi_legacy_irqs(void)
1154{
1155 int i;
1156 struct mpc_intsrc mp_irq;
1157
1158#ifdef CONFIG_EISA
1159 /*
1160 * Fabricate the legacy ISA bus (bus #31).
1161 */
1162 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1163#endif
1164 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1165 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1166
1167 /*
1168 * Use the default configuration for the IRQs 0-15. Unless
1169 * overridden by (MADT) interrupt source override entries.
1170 */
1171 for (i = 0; i < nr_legacy_irqs(); i++) {
1172 int ioapic, pin;
1173 unsigned int dstapic;
1174 int idx;
1175 u32 gsi;
1176
1177 /* Locate the gsi that irq i maps to. */
1178 if (acpi_isa_irq_to_gsi(i, &gsi))
1179 continue;
1180
1181 /*
1182 * Locate the IOAPIC that manages the ISA IRQ.
1183 */
1184 ioapic = mp_find_ioapic(gsi);
1185 if (ioapic < 0)
1186 continue;
1187 pin = mp_find_ioapic_pin(ioapic, gsi);
1188 dstapic = mpc_ioapic_id(ioapic);
1189
1190 for (idx = 0; idx < mp_irq_entries; idx++) {
1191 struct mpc_intsrc *irq = mp_irqs + idx;
1192
1193 /* Do we already have a mapping for this ISA IRQ? */
1194 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1195 break;
1196
1197 /* Do we already have a mapping for this IOAPIC pin */
1198 if (irq->dstapic == dstapic && irq->dstirq == pin)
1199 break;
1200 }
1201
1202 if (idx != mp_irq_entries) {
1203 pr_debug("ACPI: IRQ%d used by override.\n", i);
1204 continue; /* IRQ already used */
1205 }
1206
1207 mp_irq.type = MP_INTSRC;
1208 mp_irq.irqflag = 0; /* Conforming */
1209 mp_irq.srcbus = MP_ISA_BUS;
1210 mp_irq.dstapic = dstapic;
1211 mp_irq.irqtype = mp_INT;
1212 mp_irq.srcbusirq = i; /* Identity mapped */
1213 mp_irq.dstirq = pin;
1214
1215 mp_save_irq(&mp_irq);
1216 }
1217}
1218
1219/*
1220 * Parse IOAPIC related entries in MADT
1221 * returns 0 on success, < 0 on error
1222 */
1223static int __init acpi_parse_madt_ioapic_entries(void)
1224{
1225 int count;
1226
1227 /*
1228 * ACPI interpreter is required to complete interrupt setup,
1229 * so if it is off, don't enumerate the io-apics with ACPI.
1230 * If MPS is present, it will handle them,
1231 * otherwise the system will stay in PIC mode
1232 */
1233 if (acpi_disabled || acpi_noirq)
1234 return -ENODEV;
1235
1236 if (!boot_cpu_has(X86_FEATURE_APIC))
1237 return -ENODEV;
1238
1239 /*
1240 * if "noapic" boot option, don't look for IO-APICs
1241 */
1242 if (ioapic_is_disabled) {
1243 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
1244 return -ENODEV;
1245 }
1246
1247 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1248 MAX_IO_APICS);
1249 if (!count) {
1250 pr_err("No IOAPIC entries present\n");
1251 return -ENODEV;
1252 } else if (count < 0) {
1253 pr_err("Error parsing IOAPIC entry\n");
1254 return count;
1255 }
1256
1257 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1258 acpi_parse_int_src_ovr, nr_irqs);
1259 if (count < 0) {
1260 pr_err("Error parsing interrupt source overrides entry\n");
1261 /* TBD: Cleanup to allow fallback to MPS */
1262 return count;
1263 }
1264
1265 /*
1266 * If BIOS did not supply an INT_SRC_OVR for the SCI
1267 * pretend we got one so we can set the SCI flags.
1268 * But ignore setting up SCI on hardware reduced platforms.
1269 */
1270 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1271 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1272 acpi_gbl_FADT.sci_interrupt);
1273
1274 /* Fill in identity legacy mappings where no override */
1275 mp_config_acpi_legacy_irqs();
1276
1277 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1278 acpi_parse_nmi_src, nr_irqs);
1279 if (count < 0) {
1280 pr_err("Error parsing NMI SRC entry\n");
1281 /* TBD: Cleanup to allow fallback to MPS */
1282 return count;
1283 }
1284
1285 return 0;
1286}
1287#else
1288static inline int acpi_parse_madt_ioapic_entries(void)
1289{
1290 return -1;
1291}
1292#endif /* !CONFIG_X86_IO_APIC */
1293
1294static void __init early_acpi_process_madt(void)
1295{
1296#ifdef CONFIG_X86_LOCAL_APIC
1297 int error;
1298
1299 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1300
1301 /*
1302 * Parse MADT LAPIC entries
1303 */
1304 error = early_acpi_parse_madt_lapic_addr_ovr();
1305 if (!error) {
1306 acpi_lapic = 1;
1307 smp_found_config = 1;
1308 }
1309 if (error == -EINVAL) {
1310 /*
1311 * Dell Precision Workstation 410, 610 come here.
1312 */
1313 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1314 disable_acpi();
1315 }
1316 }
1317#endif
1318}
1319
1320static void __init acpi_process_madt(void)
1321{
1322#ifdef CONFIG_X86_LOCAL_APIC
1323 int error;
1324
1325 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1326
1327 /*
1328 * Parse MADT LAPIC entries
1329 */
1330 error = acpi_parse_madt_lapic_entries();
1331 if (!error) {
1332 acpi_lapic = 1;
1333
1334 /*
1335 * Parse MADT IO-APIC entries
1336 */
1337 mutex_lock(&acpi_ioapic_lock);
1338 error = acpi_parse_madt_ioapic_entries();
1339 mutex_unlock(&acpi_ioapic_lock);
1340 if (!error) {
1341 acpi_set_irq_model_ioapic();
1342
1343 smp_found_config = 1;
1344 }
1345
1346#ifdef CONFIG_X86_64
1347 /*
1348 * Parse MADT MP Wake entry.
1349 */
1350 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP,
1351 acpi_parse_mp_wake, 1);
1352#endif
1353 }
1354 if (error == -EINVAL) {
1355 /*
1356 * Dell Precision Workstation 410, 610 come here.
1357 */
1358 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1359 disable_acpi();
1360 }
1361 } else {
1362 /*
1363 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1364 * In the event an MPS table was found, forget it.
1365 * Boot with "acpi=off" to use MPS on such a system.
1366 */
1367 if (smp_found_config) {
1368 pr_warn("No APIC-table, disabling MPS\n");
1369 smp_found_config = 0;
1370 }
1371 }
1372
1373 /*
1374 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1375 * processors, where MPS only supports physical.
1376 */
1377 if (acpi_lapic && acpi_ioapic)
1378 pr_info("Using ACPI (MADT) for SMP configuration information\n");
1379 else if (acpi_lapic)
1380 pr_info("Using ACPI for processor (LAPIC) configuration information\n");
1381#endif
1382 return;
1383}
1384
1385static int __init disable_acpi_irq(const struct dmi_system_id *d)
1386{
1387 if (!acpi_force) {
1388 pr_notice("%s detected: force use of acpi=noirq\n", d->ident);
1389 acpi_noirq_set();
1390 }
1391 return 0;
1392}
1393
1394static int __init disable_acpi_pci(const struct dmi_system_id *d)
1395{
1396 if (!acpi_force) {
1397 pr_notice("%s detected: force use of pci=noacpi\n", d->ident);
1398 acpi_disable_pci();
1399 }
1400 return 0;
1401}
1402
1403static int __init disable_acpi_xsdt(const struct dmi_system_id *d)
1404{
1405 if (!acpi_force) {
1406 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident);
1407 acpi_gbl_do_not_use_xsdt = TRUE;
1408 } else {
1409 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n");
1410 }
1411 return 0;
1412}
1413
1414static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1415{
1416 if (!acpi_force) {
1417 pr_notice("%s detected: acpi off\n", d->ident);
1418 disable_acpi();
1419 } else {
1420 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n");
1421 }
1422 return 0;
1423}
1424
1425/*
1426 * Force ignoring BIOS IRQ0 override
1427 */
1428static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1429{
1430 if (!acpi_skip_timer_override) {
1431 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1432 d->ident);
1433 acpi_skip_timer_override = 1;
1434 }
1435 return 0;
1436}
1437
1438/*
1439 * ACPI offers an alternative platform interface model that removes
1440 * ACPI hardware requirements for platforms that do not implement
1441 * the PC Architecture.
1442 *
1443 * We initialize the Hardware-reduced ACPI model here:
1444 */
1445void __init acpi_generic_reduced_hw_init(void)
1446{
1447 /*
1448 * Override x86_init functions and bypass legacy PIC in
1449 * hardware reduced ACPI mode.
1450 */
1451 x86_init.timers.timer_init = x86_init_noop;
1452 x86_init.irqs.pre_vector_init = x86_init_noop;
1453 legacy_pic = &null_legacy_pic;
1454}
1455
1456static void __init acpi_reduced_hw_init(void)
1457{
1458 if (acpi_gbl_reduced_hardware)
1459 x86_init.acpi.reduced_hw_early_init();
1460}
1461
1462/*
1463 * If your system is blacklisted here, but you find that acpi=force
1464 * works for you, please contact linux-acpi@vger.kernel.org
1465 */
1466static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1467 /*
1468 * Boxes that need ACPI disabled
1469 */
1470 {
1471 .callback = dmi_disable_acpi,
1472 .ident = "IBM Thinkpad",
1473 .matches = {
1474 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1475 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1476 },
1477 },
1478
1479 /*
1480 * Boxes that need ACPI PCI IRQ routing disabled
1481 */
1482 {
1483 .callback = disable_acpi_irq,
1484 .ident = "ASUS A7V",
1485 .matches = {
1486 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1487 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1488 /* newer BIOS, Revision 1011, does work */
1489 DMI_MATCH(DMI_BIOS_VERSION,
1490 "ASUS A7V ACPI BIOS Revision 1007"),
1491 },
1492 },
1493 {
1494 /*
1495 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1496 * for LPC bridge, which is needed for the PCI
1497 * interrupt links to work. DSDT fix is in bug 5966.
1498 * 2645, 2646 model numbers are shared with 600/600E/600X
1499 */
1500 .callback = disable_acpi_irq,
1501 .ident = "IBM Thinkpad 600 Series 2645",
1502 .matches = {
1503 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1504 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1505 },
1506 },
1507 {
1508 .callback = disable_acpi_irq,
1509 .ident = "IBM Thinkpad 600 Series 2646",
1510 .matches = {
1511 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1512 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1513 },
1514 },
1515 /*
1516 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1517 */
1518 { /* _BBN 0 bug */
1519 .callback = disable_acpi_pci,
1520 .ident = "ASUS PR-DLS",
1521 .matches = {
1522 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1523 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1524 DMI_MATCH(DMI_BIOS_VERSION,
1525 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1526 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1527 },
1528 },
1529 {
1530 .callback = disable_acpi_pci,
1531 .ident = "Acer TravelMate 36x Laptop",
1532 .matches = {
1533 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1534 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1535 },
1536 },
1537 /*
1538 * Boxes that need ACPI XSDT use disabled due to corrupted tables
1539 */
1540 {
1541 .callback = disable_acpi_xsdt,
1542 .ident = "Advantech DAC-BJ01",
1543 .matches = {
1544 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1545 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"),
1546 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"),
1547 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"),
1548 },
1549 },
1550 {}
1551};
1552
1553/* second table for DMI checks that should run after early-quirks */
1554static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1555 /*
1556 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1557 * which includes some code which overrides all temperature
1558 * trip points to 16C if the INTIN2 input of the I/O APIC
1559 * is enabled. This input is incorrectly designated the
1560 * ISA IRQ 0 via an interrupt source override even though
1561 * it is wired to the output of the master 8259A and INTIN0
1562 * is not connected at all. Force ignoring BIOS IRQ0
1563 * override in that cases.
1564 */
1565 {
1566 .callback = dmi_ignore_irq0_timer_override,
1567 .ident = "HP nx6115 laptop",
1568 .matches = {
1569 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1570 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1571 },
1572 },
1573 {
1574 .callback = dmi_ignore_irq0_timer_override,
1575 .ident = "HP NX6125 laptop",
1576 .matches = {
1577 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1578 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1579 },
1580 },
1581 {
1582 .callback = dmi_ignore_irq0_timer_override,
1583 .ident = "HP NX6325 laptop",
1584 .matches = {
1585 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1586 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1587 },
1588 },
1589 {
1590 .callback = dmi_ignore_irq0_timer_override,
1591 .ident = "HP 6715b laptop",
1592 .matches = {
1593 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1594 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1595 },
1596 },
1597 {
1598 .callback = dmi_ignore_irq0_timer_override,
1599 .ident = "FUJITSU SIEMENS",
1600 .matches = {
1601 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1602 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1603 },
1604 },
1605 {}
1606};
1607
1608/*
1609 * acpi_boot_table_init() and acpi_boot_init()
1610 * called from setup_arch(), always.
1611 * 1. checksums all tables
1612 * 2. enumerates lapics
1613 * 3. enumerates io-apics
1614 *
1615 * acpi_table_init() is separate to allow reading SRAT without
1616 * other side effects.
1617 *
1618 * side effects of acpi_boot_init:
1619 * acpi_lapic = 1 if LAPIC found
1620 * acpi_ioapic = 1 if IOAPIC found
1621 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1622 * if acpi_blacklisted() acpi_disabled = 1;
1623 * acpi_irq_model=...
1624 * ...
1625 */
1626
1627void __init acpi_boot_table_init(void)
1628{
1629 dmi_check_system(acpi_dmi_table);
1630
1631 /*
1632 * If acpi_disabled, bail out
1633 */
1634 if (acpi_disabled)
1635 return;
1636
1637 /*
1638 * Initialize the ACPI boot-time table parser.
1639 */
1640 if (acpi_locate_initial_tables())
1641 disable_acpi();
1642 else
1643 acpi_reserve_initial_tables();
1644}
1645
1646int __init early_acpi_boot_init(void)
1647{
1648 if (acpi_disabled)
1649 return 1;
1650
1651 acpi_table_init_complete();
1652
1653 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1654
1655 /*
1656 * blacklist may disable ACPI entirely
1657 */
1658 if (acpi_blacklisted()) {
1659 if (acpi_force) {
1660 pr_warn("acpi=force override\n");
1661 } else {
1662 pr_warn("Disabling ACPI support\n");
1663 disable_acpi();
1664 return 1;
1665 }
1666 }
1667
1668 /*
1669 * Process the Multiple APIC Description Table (MADT), if present
1670 */
1671 early_acpi_process_madt();
1672
1673 /*
1674 * Hardware-reduced ACPI mode initialization:
1675 */
1676 acpi_reduced_hw_init();
1677
1678 return 0;
1679}
1680
1681int __init acpi_boot_init(void)
1682{
1683 /* those are executed after early-quirks are executed */
1684 dmi_check_system(acpi_dmi_table_late);
1685
1686 /*
1687 * If acpi_disabled, bail out
1688 */
1689 if (acpi_disabled)
1690 return 1;
1691
1692 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1693
1694 /*
1695 * set sci_int and PM timer address
1696 */
1697 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1698
1699 /*
1700 * Process the Multiple APIC Description Table (MADT), if present
1701 */
1702 acpi_process_madt();
1703
1704 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1705 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1706 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1707
1708 if (!acpi_noirq)
1709 x86_init.pci.init = pci_acpi_init;
1710
1711 /* Do not enable ACPI SPCR console by default */
1712 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1713 return 0;
1714}
1715
1716static int __init parse_acpi(char *arg)
1717{
1718 if (!arg)
1719 return -EINVAL;
1720
1721 /* "acpi=off" disables both ACPI table parsing and interpreter */
1722 if (strcmp(arg, "off") == 0) {
1723 disable_acpi();
1724 }
1725 /* acpi=force to over-ride black-list */
1726 else if (strcmp(arg, "force") == 0) {
1727 acpi_force = 1;
1728 acpi_disabled = 0;
1729 }
1730 /* acpi=strict disables out-of-spec workarounds */
1731 else if (strcmp(arg, "strict") == 0) {
1732 acpi_strict = 1;
1733 }
1734 /* acpi=rsdt use RSDT instead of XSDT */
1735 else if (strcmp(arg, "rsdt") == 0) {
1736 acpi_gbl_do_not_use_xsdt = TRUE;
1737 }
1738 /* "acpi=noirq" disables ACPI interrupt routing */
1739 else if (strcmp(arg, "noirq") == 0) {
1740 acpi_noirq_set();
1741 }
1742 /* "acpi=copy_dsdt" copies DSDT */
1743 else if (strcmp(arg, "copy_dsdt") == 0) {
1744 acpi_gbl_copy_dsdt_locally = 1;
1745 }
1746 /* "acpi=nocmcff" disables FF mode for corrected errors */
1747 else if (strcmp(arg, "nocmcff") == 0) {
1748 acpi_disable_cmcff = 1;
1749 } else {
1750 /* Core will printk when we return error. */
1751 return -EINVAL;
1752 }
1753 return 0;
1754}
1755early_param("acpi", parse_acpi);
1756
1757static int __init parse_acpi_bgrt(char *arg)
1758{
1759 acpi_nobgrt = true;
1760 return 0;
1761}
1762early_param("bgrt_disable", parse_acpi_bgrt);
1763
1764/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1765static int __init parse_pci(char *arg)
1766{
1767 if (arg && strcmp(arg, "noacpi") == 0)
1768 acpi_disable_pci();
1769 return 0;
1770}
1771early_param("pci", parse_pci);
1772
1773int __init acpi_mps_check(void)
1774{
1775#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1776/* mptable code is not built-in*/
1777 if (acpi_disabled || acpi_noirq) {
1778 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
1779 return 1;
1780 }
1781#endif
1782 return 0;
1783}
1784
1785#ifdef CONFIG_X86_IO_APIC
1786static int __init parse_acpi_skip_timer_override(char *arg)
1787{
1788 acpi_skip_timer_override = 1;
1789 return 0;
1790}
1791early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1792
1793static int __init parse_acpi_use_timer_override(char *arg)
1794{
1795 acpi_use_timer_override = 1;
1796 return 0;
1797}
1798early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1799#endif /* CONFIG_X86_IO_APIC */
1800
1801static int __init setup_acpi_sci(char *s)
1802{
1803 if (!s)
1804 return -EINVAL;
1805 if (!strcmp(s, "edge"))
1806 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1807 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1808 else if (!strcmp(s, "level"))
1809 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1810 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1811 else if (!strcmp(s, "high"))
1812 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1813 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1814 else if (!strcmp(s, "low"))
1815 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1816 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1817 else
1818 return -EINVAL;
1819 return 0;
1820}
1821early_param("acpi_sci", setup_acpi_sci);
1822
1823int __acpi_acquire_global_lock(unsigned int *lock)
1824{
1825 unsigned int old, new, val;
1826
1827 old = READ_ONCE(*lock);
1828 do {
1829 val = (old >> 1) & 0x1;
1830 new = (old & ~0x3) + 2 + val;
1831 } while (!try_cmpxchg(lock, &old, new));
1832
1833 if (val)
1834 return 0;
1835
1836 return -1;
1837}
1838
1839int __acpi_release_global_lock(unsigned int *lock)
1840{
1841 unsigned int old, new;
1842
1843 old = READ_ONCE(*lock);
1844 do {
1845 new = old & ~0x3;
1846 } while (!try_cmpxchg(lock, &old, new));
1847 return old & 0x1;
1848}
1849
1850void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1851{
1852 e820__range_add(addr, size, E820_TYPE_NVS);
1853 e820__update_table_print();
1854}
1855
1856void x86_default_set_root_pointer(u64 addr)
1857{
1858 boot_params.acpi_rsdp_addr = addr;
1859}
1860
1861u64 x86_default_get_root_pointer(void)
1862{
1863 return boot_params.acpi_rsdp_addr;
1864}