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boot.c
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linux-6.19.14/arch/x86/kernel/acpi/boot.c
1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 4 * 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 7 */ 8#define pr_fmt(fmt) "ACPI: " fmt 9 10#include <linux/init.h> 11#include <linux/acpi.h> 12#include <linux/acpi_pmtmr.h> 13#include <linux/efi.h> 14#include <linux/cpumask.h> 15#include <linux/export.h> 16#include <linux/dmi.h> 17#include <linux/irq.h> 18#include <linux/slab.h> 19#include <linux/memblock.h> 20#include <linux/ioport.h> 21#include <linux/pci.h> 22#include <linux/efi-bgrt.h> 23#include <linux/serial_core.h> 24#include <linux/pgtable.h> 25 26#include <xen/xen.h> 27 28#include <asm/e820/api.h> 29#include <asm/irqdomain.h> 30#include <asm/pci_x86.h> 31#include <asm/io_apic.h> 32#include <asm/apic.h> 33#include <asm/io.h> 34#include <asm/mpspec.h> 35#include <asm/smp.h> 36#include <asm/i8259.h> 37#include <asm/setup.h> 38#include <asm/hypervisor.h> 39 40#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 41static int __initdata acpi_force = 0; 42int acpi_disabled; 43EXPORT_SYMBOL(acpi_disabled); 44 45#ifdef CONFIG_X86_64 46# include <asm/proto.h> 47#endif /* X86 */ 48 49int acpi_noirq; /* skip ACPI IRQ initialization */ 50static int acpi_nobgrt; /* skip ACPI BGRT */ 51int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 52EXPORT_SYMBOL(acpi_pci_disabled); 53 54int acpi_lapic; 55int acpi_ioapic; 56int acpi_strict; 57int acpi_disable_cmcff; 58bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 59 60/* ACPI SCI override configuration */ 61u8 acpi_sci_flags __initdata; 62u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 63int acpi_skip_timer_override __initdata; 64int acpi_use_timer_override __initdata; 65int acpi_fix_pin2_polarity __initdata; 66 67#ifdef CONFIG_X86_LOCAL_APIC 68static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 69static bool has_lapic_cpus __initdata; 70static bool acpi_support_online_capable; 71#endif 72 73#ifdef CONFIG_X86_IO_APIC 74/* 75 * Locks related to IOAPIC hotplug 76 * Hotplug side: 77 * ->device_hotplug_lock 78 * ->acpi_ioapic_lock 79 * ->ioapic_lock 80 * Interrupt mapping side: 81 * ->acpi_ioapic_lock 82 * ->ioapic_mutex 83 * ->ioapic_lock 84 */ 85static DEFINE_MUTEX(acpi_ioapic_lock); 86#endif 87 88/* -------------------------------------------------------------------------- 89 Boot-time Configuration 90 -------------------------------------------------------------------------- */ 91 92/* 93 * The default interrupt routing model is PIC (8259). This gets 94 * overridden if IOAPICs are enumerated (below). 95 */ 96enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 97 98 99/* 100 * ISA irqs by default are the first 16 gsis but can be 101 * any gsi as specified by an interrupt source override. 102 */ 103static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 104 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 105}; 106 107/* 108 * This is just a simple wrapper around early_memremap(), 109 * with sanity checks for phys == 0 and size == 0. 110 */ 111void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 112{ 113 114 if (!phys || !size) 115 return NULL; 116 117 return early_memremap(phys, size); 118} 119 120void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 121{ 122 if (!map || !size) 123 return; 124 125 early_memunmap(map, size); 126} 127 128#ifdef CONFIG_X86_LOCAL_APIC 129static int __init acpi_parse_madt(struct acpi_table_header *table) 130{ 131 struct acpi_table_madt *madt = NULL; 132 133 if (!boot_cpu_has(X86_FEATURE_APIC)) 134 return -EINVAL; 135 136 madt = (struct acpi_table_madt *)table; 137 if (!madt) { 138 pr_warn("Unable to map MADT\n"); 139 return -ENODEV; 140 } 141 142 if (madt->address) { 143 acpi_lapic_addr = (u64) madt->address; 144 145 pr_debug("Local APIC address 0x%08x\n", madt->address); 146 } 147 148 if (madt->flags & ACPI_MADT_PCAT_COMPAT) 149 legacy_pic_pcat_compat(); 150 151 /* ACPI 6.3 and newer support the online capable bit. */ 152 if (acpi_gbl_FADT.header.revision > 6 || 153 (acpi_gbl_FADT.header.revision == 6 && 154 acpi_gbl_FADT.minor_revision >= 3)) 155 acpi_support_online_capable = true; 156 157 default_acpi_madt_oem_check(madt->header.oem_id, 158 madt->header.oem_table_id); 159 160 return 0; 161} 162 163static bool __init acpi_is_processor_usable(u32 lapic_flags) 164{ 165 if (lapic_flags & ACPI_MADT_ENABLED) 166 return true; 167 168 if (acpi_support_online_capable) 169 return lapic_flags & ACPI_MADT_ONLINE_CAPABLE; 170 171 /* 172 * QEMU expects legacy "Enabled=0" LAPIC entries to be counted as usable 173 * in order to support CPU hotplug in guests. 174 */ 175 return !hypervisor_is_type(X86_HYPER_NATIVE); 176} 177 178static int __init 179acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 180{ 181 struct acpi_madt_local_x2apic *processor = NULL; 182#ifdef CONFIG_X86_X2APIC 183 u32 apic_id; 184 u8 enabled; 185#endif 186 187 processor = (struct acpi_madt_local_x2apic *)header; 188 189 if (BAD_MADT_ENTRY(processor, end)) 190 return -EINVAL; 191 192 acpi_table_print_madt_entry(&header->common); 193 194#ifdef CONFIG_X86_X2APIC 195 apic_id = processor->local_apic_id; 196 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 197 198 /* Ignore invalid ID */ 199 if (apic_id == 0xffffffff) 200 return 0; 201 202 /* don't register processors that cannot be onlined */ 203 if (!acpi_is_processor_usable(processor->lapic_flags)) 204 return 0; 205 206 /* 207 * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure 208 * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID 209 * in x2APIC must be equal or greater than 0xff. 210 */ 211 if (has_lapic_cpus && apic_id < 0xff) 212 return 0; 213 214 /* 215 * We need to register disabled CPU as well to permit 216 * counting disabled CPUs. This allows us to size 217 * cpus_possible_map more accurately, to permit 218 * to not preallocating memory for all NR_CPUS 219 * when we use CPU hotplug. 220 */ 221 if (!apic_id_valid(apic_id)) { 222 if (enabled) 223 pr_warn("x2apic entry ignored\n"); 224 return 0; 225 } 226 227 topology_register_apic(apic_id, processor->uid, enabled); 228#else 229 pr_warn("x2apic entry ignored\n"); 230#endif 231 232 return 0; 233} 234 235static int __init 236acpi_check_lapic(union acpi_subtable_headers *header, const unsigned long end) 237{ 238 struct acpi_madt_local_apic *processor = NULL; 239 240 processor = (struct acpi_madt_local_apic *)header; 241 242 if (BAD_MADT_ENTRY(processor, end)) 243 return -EINVAL; 244 245 /* Ignore invalid ID */ 246 if (processor->id == 0xff) 247 return 0; 248 249 /* Ignore processors that can not be onlined */ 250 if (!acpi_is_processor_usable(processor->lapic_flags)) 251 return 0; 252 253 has_lapic_cpus = true; 254 return 0; 255} 256 257static int __init 258acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 259{ 260 struct acpi_madt_local_apic *processor = NULL; 261 262 processor = (struct acpi_madt_local_apic *)header; 263 264 if (BAD_MADT_ENTRY(processor, end)) 265 return -EINVAL; 266 267 acpi_table_print_madt_entry(&header->common); 268 269 /* Ignore invalid ID */ 270 if (processor->id == 0xff) 271 return 0; 272 273 /* don't register processors that can not be onlined */ 274 if (!acpi_is_processor_usable(processor->lapic_flags)) 275 return 0; 276 277 /* 278 * We need to register disabled CPU as well to permit 279 * counting disabled CPUs. This allows us to size 280 * cpus_possible_map more accurately, to permit 281 * to not preallocating memory for all NR_CPUS 282 * when we use CPU hotplug. 283 */ 284 topology_register_apic(processor->id, /* APIC ID */ 285 processor->processor_id, /* ACPI ID */ 286 processor->lapic_flags & ACPI_MADT_ENABLED); 287 288 return 0; 289} 290 291static int __init 292acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 293{ 294 struct acpi_madt_local_sapic *processor = NULL; 295 296 processor = (struct acpi_madt_local_sapic *)header; 297 298 if (BAD_MADT_ENTRY(processor, end)) 299 return -EINVAL; 300 301 acpi_table_print_madt_entry(&header->common); 302 303 topology_register_apic((processor->id << 8) | processor->eid,/* APIC ID */ 304 processor->processor_id, /* ACPI ID */ 305 processor->lapic_flags & ACPI_MADT_ENABLED); 306 307 return 0; 308} 309 310static int __init 311acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 312 const unsigned long end) 313{ 314 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 315 316 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 317 318 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 319 return -EINVAL; 320 321 acpi_table_print_madt_entry(&header->common); 322 323 acpi_lapic_addr = lapic_addr_ovr->address; 324 325 return 0; 326} 327 328static int __init 329acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 330 const unsigned long end) 331{ 332 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 333 334 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 335 336 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 337 return -EINVAL; 338 339 acpi_table_print_madt_entry(&header->common); 340 341 if (x2apic_nmi->lint != 1) 342 pr_warn("NMI not connected to LINT 1!\n"); 343 344 return 0; 345} 346 347static int __init 348acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 349{ 350 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 351 352 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 353 354 if (BAD_MADT_ENTRY(lapic_nmi, end)) 355 return -EINVAL; 356 357 acpi_table_print_madt_entry(&header->common); 358 359 if (lapic_nmi->lint != 1) 360 pr_warn("NMI not connected to LINT 1!\n"); 361 362 return 0; 363} 364#endif /* CONFIG_X86_LOCAL_APIC */ 365 366#ifdef CONFIG_X86_IO_APIC 367#define MP_ISA_BUS 0 368 369static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 370 u8 trigger, u32 gsi); 371 372static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 373 u32 gsi) 374{ 375 /* 376 * Check bus_irq boundary. 377 */ 378 if (bus_irq >= NR_IRQS_LEGACY) { 379 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 380 return; 381 } 382 383 /* 384 * TBD: This check is for faulty timer entries, where the override 385 * erroneously sets the trigger to level, resulting in a HUGE 386 * increase of timer interrupts! 387 */ 388 if ((bus_irq == 0) && (trigger == 3)) 389 trigger = 1; 390 391 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 392 return; 393 /* 394 * Reset default identity mapping if gsi is also an legacy IRQ, 395 * otherwise there will be more than one entry with the same GSI 396 * and acpi_isa_irq_to_gsi() may give wrong result. 397 */ 398 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 399 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 400 isa_irq_to_gsi[bus_irq] = gsi; 401} 402 403static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 404 int polarity) 405{ 406#ifdef CONFIG_X86_MPPARSE 407 struct mpc_intsrc mp_irq; 408 struct pci_dev *pdev; 409 unsigned char number; 410 unsigned int devfn; 411 int ioapic; 412 u8 pin; 413 414 if (!acpi_ioapic) 415 return; 416 if (!dev || !dev_is_pci(dev)) 417 return; 418 419 pdev = to_pci_dev(dev); 420 number = pdev->bus->number; 421 devfn = pdev->devfn; 422 pin = pdev->pin; 423 /* print the entry should happen on mptable identically */ 424 mp_irq.type = MP_INTSRC; 425 mp_irq.irqtype = mp_INT; 426 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 427 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 428 mp_irq.srcbus = number; 429 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 430 ioapic = mp_find_ioapic(gsi); 431 mp_irq.dstapic = mpc_ioapic_id(ioapic); 432 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 433 434 mp_save_irq(&mp_irq); 435#endif 436} 437 438static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 439 u8 trigger, u32 gsi) 440{ 441 struct mpc_intsrc mp_irq; 442 int ioapic, pin; 443 444 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 445 ioapic = mp_find_ioapic(gsi); 446 if (ioapic < 0) { 447 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 448 return ioapic; 449 } 450 451 pin = mp_find_ioapic_pin(ioapic, gsi); 452 453 mp_irq.type = MP_INTSRC; 454 mp_irq.irqtype = mp_INT; 455 mp_irq.irqflag = (trigger << 2) | polarity; 456 mp_irq.srcbus = MP_ISA_BUS; 457 mp_irq.srcbusirq = bus_irq; 458 mp_irq.dstapic = mpc_ioapic_id(ioapic); 459 mp_irq.dstirq = pin; 460 461 mp_save_irq(&mp_irq); 462 463 return 0; 464} 465 466static int __init 467acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 468{ 469 struct acpi_madt_io_apic *ioapic = NULL; 470 struct ioapic_domain_cfg cfg = { 471 .type = IOAPIC_DOMAIN_DYNAMIC, 472 .ops = &mp_ioapic_irqdomain_ops, 473 }; 474 475 ioapic = (struct acpi_madt_io_apic *)header; 476 477 if (BAD_MADT_ENTRY(ioapic, end)) 478 return -EINVAL; 479 480 acpi_table_print_madt_entry(&header->common); 481 482 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 483 if (ioapic->global_irq_base < nr_legacy_irqs()) 484 cfg.type = IOAPIC_DOMAIN_LEGACY; 485 486 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 487 &cfg); 488 489 return 0; 490} 491 492/* 493 * Parse Interrupt Source Override for the ACPI SCI 494 */ 495static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 496{ 497 if (trigger == 0) /* compatible SCI trigger is level */ 498 trigger = 3; 499 500 if (polarity == 0) /* compatible SCI polarity is low */ 501 polarity = 3; 502 503 /* Command-line over-ride via acpi_sci= */ 504 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 505 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 506 507 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 508 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 509 510 if (bus_irq < NR_IRQS_LEGACY) 511 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 512 else 513 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 514 515 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 516 517 /* 518 * stash over-ride to indicate we've been here 519 * and for later update of acpi_gbl_FADT 520 */ 521 acpi_sci_override_gsi = gsi; 522 return; 523} 524 525static int __init 526acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 527 const unsigned long end) 528{ 529 struct acpi_madt_interrupt_override *intsrc = NULL; 530 531 intsrc = (struct acpi_madt_interrupt_override *)header; 532 533 if (BAD_MADT_ENTRY(intsrc, end)) 534 return -EINVAL; 535 536 acpi_table_print_madt_entry(&header->common); 537 538 if (intsrc->source_irq < NR_IRQS_LEGACY) 539 acpi_int_src_ovr[intsrc->source_irq] = true; 540 541 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 542 acpi_sci_ioapic_setup(intsrc->source_irq, 543 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 544 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 545 intsrc->global_irq); 546 return 0; 547 } 548 549 if (intsrc->source_irq == 0) { 550 if (acpi_skip_timer_override) { 551 pr_warn("BIOS IRQ0 override ignored.\n"); 552 return 0; 553 } 554 555 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 556 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 557 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 558 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 559 } 560 } 561 562 mp_override_legacy_irq(intsrc->source_irq, 563 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 564 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 565 intsrc->global_irq); 566 567 return 0; 568} 569 570static int __init 571acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 572{ 573 struct acpi_madt_nmi_source *nmi_src = NULL; 574 575 nmi_src = (struct acpi_madt_nmi_source *)header; 576 577 if (BAD_MADT_ENTRY(nmi_src, end)) 578 return -EINVAL; 579 580 acpi_table_print_madt_entry(&header->common); 581 582 /* TBD: Support nimsrc entries? */ 583 584 return 0; 585} 586 587#endif /* CONFIG_X86_IO_APIC */ 588 589/* 590 * acpi_pic_sci_set_trigger() 591 * 592 * use ELCR to set PIC-mode trigger type for SCI 593 * 594 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 595 * it may require Edge Trigger -- use "acpi_sci=edge" 596 * 597 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 598 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 599 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 600 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 601 */ 602 603void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 604{ 605 unsigned int mask = 1 << irq; 606 unsigned int old, new; 607 608 /* Real old ELCR mask */ 609 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 610 611 /* 612 * If we use ACPI to set PCI IRQs, then we should clear ELCR 613 * since we will set it correctly as we enable the PCI irq 614 * routing. 615 */ 616 new = acpi_noirq ? old : 0; 617 618 /* 619 * Update SCI information in the ELCR, it isn't in the PCI 620 * routing tables.. 621 */ 622 switch (trigger) { 623 case 1: /* Edge - clear */ 624 new &= ~mask; 625 break; 626 case 3: /* Level - set */ 627 new |= mask; 628 break; 629 } 630 631 if (old == new) 632 return; 633 634 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 635 outb(new, PIC_ELCR1); 636 outb(new >> 8, PIC_ELCR2); 637} 638 639int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 640{ 641 int rc, irq, trigger, polarity; 642 643 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 644 *irqp = gsi; 645 return 0; 646 } 647 648 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 649 if (rc) 650 return rc; 651 652 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 653 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 654 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 655 if (irq < 0) 656 return irq; 657 658 *irqp = irq; 659 return 0; 660} 661EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 662 663int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 664{ 665 if (isa_irq < nr_legacy_irqs() && 666 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 667 *gsi = isa_irq_to_gsi[isa_irq]; 668 return 0; 669 } 670 671 return -1; 672} 673 674static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 675 int trigger, int polarity) 676{ 677#ifdef CONFIG_PCI 678 /* 679 * Make sure all (legacy) PCI IRQs are set as level-triggered. 680 */ 681 if (trigger == ACPI_LEVEL_SENSITIVE) 682 elcr_set_level_irq(gsi); 683#endif 684 685 return gsi; 686} 687 688#ifdef CONFIG_X86_LOCAL_APIC 689static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 690 int trigger, int polarity) 691{ 692 int irq = gsi; 693#ifdef CONFIG_X86_IO_APIC 694 int node; 695 struct irq_alloc_info info; 696 697 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 698 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 699 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 700 ioapic_set_alloc_attr(&info, node, trigger, polarity); 701 702 mutex_lock(&acpi_ioapic_lock); 703 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 704 /* Don't set up the ACPI SCI because it's already set up */ 705 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 706 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 707 mutex_unlock(&acpi_ioapic_lock); 708#endif 709 710 return irq; 711} 712 713static void acpi_unregister_gsi_ioapic(u32 gsi) 714{ 715#ifdef CONFIG_X86_IO_APIC 716 int irq; 717 718 mutex_lock(&acpi_ioapic_lock); 719 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 720 if (irq > 0) 721 mp_unmap_irq(irq); 722 mutex_unlock(&acpi_ioapic_lock); 723#endif 724} 725#endif 726 727int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 728 int trigger, int polarity) = acpi_register_gsi_pic; 729void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 730 731#ifdef CONFIG_ACPI_SLEEP 732int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 733#else 734int (*acpi_suspend_lowlevel)(void); 735#endif 736 737/* 738 * success: return IRQ number (>=0) 739 * failure: return < 0 740 */ 741int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 742{ 743 return __acpi_register_gsi(dev, gsi, trigger, polarity); 744} 745EXPORT_SYMBOL_GPL(acpi_register_gsi); 746 747void acpi_unregister_gsi(u32 gsi) 748{ 749 if (__acpi_unregister_gsi) 750 __acpi_unregister_gsi(gsi); 751} 752EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 753 754#ifdef CONFIG_X86_LOCAL_APIC 755static void __init acpi_set_irq_model_ioapic(void) 756{ 757 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 758 __acpi_register_gsi = acpi_register_gsi_ioapic; 759 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 760 acpi_ioapic = 1; 761} 762#endif 763 764/* 765 * ACPI based hotplug support for CPU 766 */ 767#ifdef CONFIG_ACPI_HOTPLUG_CPU 768#include <acpi/processor.h> 769 770static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 771{ 772#ifdef CONFIG_ACPI_NUMA 773 int nid; 774 775 nid = acpi_get_node(handle); 776 if (nid != NUMA_NO_NODE) { 777 set_apicid_to_node(physid, nid); 778 numa_set_node(cpu, nid); 779 } 780#endif 781 return 0; 782} 783 784int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu) 785{ 786 int cpu = topology_hotplug_apic(physid, acpi_id); 787 788 if (cpu < 0) { 789 pr_info("Unable to map lapic to logical cpu number\n"); 790 return cpu; 791 } 792 793 acpi_processor_set_pdc(handle); 794 acpi_map_cpu2node(handle, cpu, physid); 795 796 *pcpu = cpu; 797 return 0; 798} 799EXPORT_SYMBOL(acpi_map_cpu); 800 801int acpi_unmap_cpu(int cpu) 802{ 803#ifdef CONFIG_ACPI_NUMA 804 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 805#endif 806 topology_hotunplug_apic(cpu); 807 return 0; 808} 809EXPORT_SYMBOL(acpi_unmap_cpu); 810#endif /* CONFIG_ACPI_HOTPLUG_CPU */ 811 812int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 813{ 814 int ret = -ENOSYS; 815#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 816 int ioapic_id; 817 u64 addr; 818 struct ioapic_domain_cfg cfg = { 819 .type = IOAPIC_DOMAIN_DYNAMIC, 820 .ops = &mp_ioapic_irqdomain_ops, 821 }; 822 823 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 824 if (ioapic_id < 0) { 825 unsigned long long uid; 826 acpi_status status; 827 828 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 829 NULL, &uid); 830 if (ACPI_FAILURE(status)) { 831 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 832 return -EINVAL; 833 } 834 ioapic_id = (int)uid; 835 } 836 837 mutex_lock(&acpi_ioapic_lock); 838 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 839 mutex_unlock(&acpi_ioapic_lock); 840#endif 841 842 return ret; 843} 844EXPORT_SYMBOL(acpi_register_ioapic); 845 846int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 847{ 848 int ret = -ENOSYS; 849 850#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 851 mutex_lock(&acpi_ioapic_lock); 852 ret = mp_unregister_ioapic(gsi_base); 853 mutex_unlock(&acpi_ioapic_lock); 854#endif 855 856 return ret; 857} 858EXPORT_SYMBOL(acpi_unregister_ioapic); 859 860/** 861 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 862 * has been registered 863 * @handle: ACPI handle of the IOAPIC device 864 * @gsi_base: GSI base associated with the IOAPIC 865 * 866 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 867 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 868 */ 869int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 870{ 871 int ret = 0; 872 873#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 874 mutex_lock(&acpi_ioapic_lock); 875 ret = mp_ioapic_registered(gsi_base); 876 mutex_unlock(&acpi_ioapic_lock); 877#endif 878 879 return ret; 880} 881 882static int __init acpi_parse_sbf(struct acpi_table_header *table) 883{ 884 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 885 886 sbf_port = sb->cmos_index; /* Save CMOS port */ 887 888 return 0; 889} 890 891#ifdef CONFIG_HPET_TIMER 892#include <asm/hpet.h> 893 894static struct resource *hpet_res __initdata; 895 896static int __init acpi_parse_hpet(struct acpi_table_header *table) 897{ 898 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 899 900 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 901 pr_warn("HPET timers must be located in memory.\n"); 902 return -1; 903 } 904 905 hpet_address = hpet_tbl->address.address; 906 hpet_blockid = hpet_tbl->sequence; 907 908 /* 909 * Some broken BIOSes advertise HPET at 0x0. We really do not 910 * want to allocate a resource there. 911 */ 912 if (!hpet_address) { 913 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 914 return 0; 915 } 916#ifdef CONFIG_X86_64 917 /* 918 * Some even more broken BIOSes advertise HPET at 919 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 920 * some noise: 921 */ 922 if (hpet_address == 0xfed0000000000000UL) { 923 if (!hpet_force_user) { 924 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 925 hpet_tbl->id); 926 hpet_address = 0; 927 return 0; 928 } 929 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 930 hpet_tbl->id); 931 hpet_address >>= 32; 932 } 933#endif 934 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 935 936 /* 937 * Allocate and initialize the HPET firmware resource for adding into 938 * the resource tree during the lateinit timeframe. 939 */ 940#define HPET_RESOURCE_NAME_SIZE 9 941 hpet_res = memblock_alloc_or_panic(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 942 SMP_CACHE_BYTES); 943 944 hpet_res->name = (void *)&hpet_res[1]; 945 hpet_res->flags = IORESOURCE_MEM; 946 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 947 hpet_tbl->sequence); 948 949 hpet_res->start = hpet_address; 950 hpet_res->end = hpet_address + (1 * 1024) - 1; 951 952 return 0; 953} 954 955/* 956 * hpet_insert_resource inserts the HPET resources used into the resource 957 * tree. 958 */ 959static __init int hpet_insert_resource(void) 960{ 961 if (!hpet_res) 962 return 1; 963 964 return insert_resource(&iomem_resource, hpet_res); 965} 966 967late_initcall(hpet_insert_resource); 968 969#else 970#define acpi_parse_hpet NULL 971#endif 972 973static int __init acpi_parse_fadt(struct acpi_table_header *table) 974{ 975 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 976 pr_debug("no legacy devices present\n"); 977 x86_platform.legacy.devices.pnpbios = 0; 978 } 979 980 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 981 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 982 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 983 pr_debug("i8042 controller is absent\n"); 984 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 985 } 986 987 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 988 pr_debug("not registering RTC platform device\n"); 989 x86_platform.legacy.rtc = 0; 990 } 991 992 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 993 pr_debug("probing for VGA not safe\n"); 994 x86_platform.legacy.no_vga = 1; 995 } 996 997#ifdef CONFIG_X86_PM_TIMER 998 /* detect the location of the ACPI PM Timer */ 999 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 1000 /* FADT rev. 2 */ 1001 if (acpi_gbl_FADT.xpm_timer_block.space_id != 1002 ACPI_ADR_SPACE_SYSTEM_IO) 1003 return 0; 1004 1005 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1006 /* 1007 * "X" fields are optional extensions to the original V1.0 1008 * fields, so we must selectively expand V1.0 fields if the 1009 * corresponding X field is zero. 1010 */ 1011 if (!pmtmr_ioport) 1012 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1013 } else { 1014 /* FADT rev. 1 */ 1015 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1016 } 1017 if (pmtmr_ioport) 1018 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 1019#endif 1020 return 0; 1021} 1022 1023#ifdef CONFIG_X86_LOCAL_APIC 1024/* 1025 * Parse LAPIC entries in MADT 1026 * returns 0 on success, < 0 on error 1027 */ 1028 1029static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1030{ 1031 int count; 1032 1033 if (!boot_cpu_has(X86_FEATURE_APIC)) 1034 return -ENODEV; 1035 1036 /* 1037 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1038 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1039 */ 1040 1041 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1042 acpi_parse_lapic_addr_ovr, 0); 1043 if (count < 0) { 1044 pr_err("Error parsing LAPIC address override entry\n"); 1045 return count; 1046 } 1047 1048 register_lapic_address(acpi_lapic_addr); 1049 1050 return count; 1051} 1052 1053static int __init acpi_parse_madt_lapic_entries(void) 1054{ 1055 int count, x2count = 0; 1056 struct acpi_subtable_proc madt_proc[2]; 1057 int ret; 1058 1059 if (!boot_cpu_has(X86_FEATURE_APIC)) 1060 return -ENODEV; 1061 1062 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1063 acpi_parse_sapic, MAX_LOCAL_APIC); 1064 1065 if (!count) { 1066 /* Check if there are valid LAPIC entries */ 1067 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_check_lapic, MAX_LOCAL_APIC); 1068 1069 /* 1070 * Enumerate the APIC IDs in the order that they appear in the 1071 * MADT, no matter LAPIC entry or x2APIC entry is used. 1072 */ 1073 memset(madt_proc, 0, sizeof(madt_proc)); 1074 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1075 madt_proc[0].handler = acpi_parse_lapic; 1076 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1077 madt_proc[1].handler = acpi_parse_x2apic; 1078 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1079 sizeof(struct acpi_table_madt), 1080 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1081 if (ret < 0) { 1082 pr_err("Error parsing LAPIC/X2APIC entries\n"); 1083 return ret; 1084 } 1085 count = madt_proc[0].count; 1086 x2count = madt_proc[1].count; 1087 } 1088 if (!count && !x2count) { 1089 pr_err("No LAPIC entries present\n"); 1090 /* TBD: Cleanup to allow fallback to MPS */ 1091 return -ENODEV; 1092 } else if (count < 0 || x2count < 0) { 1093 pr_err("Error parsing LAPIC entry\n"); 1094 /* TBD: Cleanup to allow fallback to MPS */ 1095 return count; 1096 } 1097 1098 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1099 acpi_parse_x2apic_nmi, 0); 1100 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1101 acpi_parse_lapic_nmi, 0); 1102 if (count < 0 || x2count < 0) { 1103 pr_err("Error parsing LAPIC NMI entry\n"); 1104 /* TBD: Cleanup to allow fallback to MPS */ 1105 return count; 1106 } 1107 return 0; 1108} 1109#endif /* CONFIG_X86_LOCAL_APIC */ 1110 1111#ifdef CONFIG_X86_IO_APIC 1112static void __init mp_config_acpi_legacy_irqs(void) 1113{ 1114 int i; 1115 struct mpc_intsrc mp_irq; 1116 1117#ifdef CONFIG_EISA 1118 /* 1119 * Fabricate the legacy ISA bus (bus #31). 1120 */ 1121 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1122#endif 1123 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1124 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1125 1126 /* 1127 * Use the default configuration for the IRQs 0-15. Unless 1128 * overridden by (MADT) interrupt source override entries. 1129 */ 1130 for (i = 0; i < nr_legacy_irqs(); i++) { 1131 int ioapic, pin; 1132 unsigned int dstapic; 1133 int idx; 1134 u32 gsi; 1135 1136 /* Locate the gsi that irq i maps to. */ 1137 if (acpi_isa_irq_to_gsi(i, &gsi)) 1138 continue; 1139 1140 /* 1141 * Locate the IOAPIC that manages the ISA IRQ. 1142 */ 1143 ioapic = mp_find_ioapic(gsi); 1144 if (ioapic < 0) 1145 continue; 1146 pin = mp_find_ioapic_pin(ioapic, gsi); 1147 dstapic = mpc_ioapic_id(ioapic); 1148 1149 for (idx = 0; idx < mp_irq_entries; idx++) { 1150 struct mpc_intsrc *irq = mp_irqs + idx; 1151 1152 /* Do we already have a mapping for this ISA IRQ? */ 1153 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1154 break; 1155 1156 /* Do we already have a mapping for this IOAPIC pin */ 1157 if (irq->dstapic == dstapic && irq->dstirq == pin) 1158 break; 1159 } 1160 1161 if (idx != mp_irq_entries) { 1162 pr_debug("ACPI: IRQ%d used by override.\n", i); 1163 continue; /* IRQ already used */ 1164 } 1165 1166 mp_irq.type = MP_INTSRC; 1167 mp_irq.irqflag = 0; /* Conforming */ 1168 mp_irq.srcbus = MP_ISA_BUS; 1169 mp_irq.dstapic = dstapic; 1170 mp_irq.irqtype = mp_INT; 1171 mp_irq.srcbusirq = i; /* Identity mapped */ 1172 mp_irq.dstirq = pin; 1173 1174 mp_save_irq(&mp_irq); 1175 } 1176} 1177 1178/* 1179 * Parse IOAPIC related entries in MADT 1180 * returns 0 on success, < 0 on error 1181 */ 1182static int __init acpi_parse_madt_ioapic_entries(void) 1183{ 1184 int count; 1185 1186 /* 1187 * ACPI interpreter is required to complete interrupt setup, 1188 * so if it is off, don't enumerate the io-apics with ACPI. 1189 * If MPS is present, it will handle them, 1190 * otherwise the system will stay in PIC mode 1191 */ 1192 if (acpi_disabled || acpi_noirq) 1193 return -ENODEV; 1194 1195 if (!boot_cpu_has(X86_FEATURE_APIC)) 1196 return -ENODEV; 1197 1198 /* 1199 * if "noapic" boot option, don't look for IO-APICs 1200 */ 1201 if (ioapic_is_disabled) { 1202 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1203 return -ENODEV; 1204 } 1205 1206 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1207 MAX_IO_APICS); 1208 if (!count) { 1209 pr_err("No IOAPIC entries present\n"); 1210 return -ENODEV; 1211 } else if (count < 0) { 1212 pr_err("Error parsing IOAPIC entry\n"); 1213 return count; 1214 } 1215 1216 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1217 acpi_parse_int_src_ovr, 1218 irq_get_nr_irqs()); 1219 if (count < 0) { 1220 pr_err("Error parsing interrupt source overrides entry\n"); 1221 /* TBD: Cleanup to allow fallback to MPS */ 1222 return count; 1223 } 1224 1225 /* 1226 * If BIOS did not supply an INT_SRC_OVR for the SCI 1227 * pretend we got one so we can set the SCI flags. 1228 * But ignore setting up SCI on hardware reduced platforms. 1229 */ 1230 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1231 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1232 acpi_gbl_FADT.sci_interrupt); 1233 1234 /* Fill in identity legacy mappings where no override */ 1235 mp_config_acpi_legacy_irqs(); 1236 1237 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1238 acpi_parse_nmi_src, 1239 irq_get_nr_irqs()); 1240 if (count < 0) { 1241 pr_err("Error parsing NMI SRC entry\n"); 1242 /* TBD: Cleanup to allow fallback to MPS */ 1243 return count; 1244 } 1245 1246 return 0; 1247} 1248#else 1249static inline int acpi_parse_madt_ioapic_entries(void) 1250{ 1251 return -1; 1252} 1253#endif /* !CONFIG_X86_IO_APIC */ 1254 1255static void __init early_acpi_process_madt(void) 1256{ 1257#ifdef CONFIG_X86_LOCAL_APIC 1258 int error; 1259 1260 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1261 1262 /* 1263 * Parse MADT LAPIC entries 1264 */ 1265 error = early_acpi_parse_madt_lapic_addr_ovr(); 1266 if (!error) { 1267 acpi_lapic = 1; 1268 smp_found_config = 1; 1269 } 1270 if (error == -EINVAL) { 1271 /* 1272 * Dell Precision Workstation 410, 610 come here. 1273 */ 1274 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1275 disable_acpi(); 1276 } 1277 } 1278#endif 1279} 1280 1281static void __init acpi_process_madt(void) 1282{ 1283#ifdef CONFIG_X86_LOCAL_APIC 1284 int error; 1285 1286 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1287 1288 /* 1289 * Parse MADT LAPIC entries 1290 */ 1291 error = acpi_parse_madt_lapic_entries(); 1292 if (!error) { 1293 acpi_lapic = 1; 1294 1295 /* 1296 * Parse MADT IO-APIC entries 1297 */ 1298 mutex_lock(&acpi_ioapic_lock); 1299 error = acpi_parse_madt_ioapic_entries(); 1300 mutex_unlock(&acpi_ioapic_lock); 1301 if (!error) { 1302 acpi_set_irq_model_ioapic(); 1303 1304 smp_found_config = 1; 1305 } 1306 1307#ifdef CONFIG_ACPI_MADT_WAKEUP 1308 /* 1309 * Parse MADT MP Wake entry. 1310 */ 1311 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1312 acpi_parse_mp_wake, 1); 1313#endif 1314 } 1315 if (error == -EINVAL) { 1316 /* 1317 * Dell Precision Workstation 410, 610 come here. 1318 */ 1319 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1320 disable_acpi(); 1321 } 1322 } else { 1323 /* 1324 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1325 * In the event an MPS table was found, forget it. 1326 * Boot with "acpi=off" to use MPS on such a system. 1327 */ 1328 if (smp_found_config) { 1329 pr_warn("No APIC-table, disabling MPS\n"); 1330 smp_found_config = 0; 1331 } 1332 } 1333 1334 /* 1335 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1336 * processors, where MPS only supports physical. 1337 */ 1338 if (acpi_lapic && acpi_ioapic) 1339 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1340 else if (acpi_lapic) 1341 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1342#endif 1343 return; 1344} 1345 1346static int __init disable_acpi_irq(const struct dmi_system_id *d) 1347{ 1348 if (!acpi_force) { 1349 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1350 acpi_noirq_set(); 1351 } 1352 return 0; 1353} 1354 1355static int __init disable_acpi_pci(const struct dmi_system_id *d) 1356{ 1357 if (!acpi_force) { 1358 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1359 acpi_disable_pci(); 1360 } 1361 return 0; 1362} 1363 1364static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1365{ 1366 if (!acpi_force) { 1367 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1368 acpi_gbl_do_not_use_xsdt = TRUE; 1369 } else { 1370 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1371 } 1372 return 0; 1373} 1374 1375static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1376{ 1377 if (!acpi_force) { 1378 pr_notice("%s detected: acpi off\n", d->ident); 1379 disable_acpi(); 1380 } else { 1381 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1382 } 1383 return 0; 1384} 1385 1386/* 1387 * Force ignoring BIOS IRQ0 override 1388 */ 1389static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1390{ 1391 if (!acpi_skip_timer_override) { 1392 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1393 d->ident); 1394 acpi_skip_timer_override = 1; 1395 } 1396 return 0; 1397} 1398 1399/* 1400 * ACPI offers an alternative platform interface model that removes 1401 * ACPI hardware requirements for platforms that do not implement 1402 * the PC Architecture. 1403 * 1404 * We initialize the Hardware-reduced ACPI model here: 1405 */ 1406void __init acpi_generic_reduced_hw_init(void) 1407{ 1408 /* 1409 * Override x86_init functions and bypass legacy PIC in 1410 * hardware reduced ACPI mode. 1411 */ 1412 x86_init.timers.timer_init = x86_init_noop; 1413 x86_init.irqs.pre_vector_init = x86_init_noop; 1414 legacy_pic = &null_legacy_pic; 1415} 1416 1417static void __init acpi_reduced_hw_init(void) 1418{ 1419 if (acpi_gbl_reduced_hardware) 1420 x86_init.acpi.reduced_hw_early_init(); 1421} 1422 1423/* 1424 * If your system is blacklisted here, but you find that acpi=force 1425 * works for you, please contact linux-acpi@vger.kernel.org 1426 */ 1427static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1428 /* 1429 * Boxes that need ACPI disabled 1430 */ 1431 { 1432 .callback = dmi_disable_acpi, 1433 .ident = "IBM Thinkpad", 1434 .matches = { 1435 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1436 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1437 }, 1438 }, 1439 1440 /* 1441 * Boxes that need ACPI PCI IRQ routing disabled 1442 */ 1443 { 1444 .callback = disable_acpi_irq, 1445 .ident = "ASUS A7V", 1446 .matches = { 1447 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1448 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1449 /* newer BIOS, Revision 1011, does work */ 1450 DMI_MATCH(DMI_BIOS_VERSION, 1451 "ASUS A7V ACPI BIOS Revision 1007"), 1452 }, 1453 }, 1454 { 1455 /* 1456 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1457 * for LPC bridge, which is needed for the PCI 1458 * interrupt links to work. DSDT fix is in bug 5966. 1459 * 2645, 2646 model numbers are shared with 600/600E/600X 1460 */ 1461 .callback = disable_acpi_irq, 1462 .ident = "IBM Thinkpad 600 Series 2645", 1463 .matches = { 1464 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1465 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1466 }, 1467 }, 1468 { 1469 .callback = disable_acpi_irq, 1470 .ident = "IBM Thinkpad 600 Series 2646", 1471 .matches = { 1472 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1473 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1474 }, 1475 }, 1476 /* 1477 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1478 */ 1479 { /* _BBN 0 bug */ 1480 .callback = disable_acpi_pci, 1481 .ident = "ASUS PR-DLS", 1482 .matches = { 1483 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1484 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1485 DMI_MATCH(DMI_BIOS_VERSION, 1486 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1487 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1488 }, 1489 }, 1490 { 1491 .callback = disable_acpi_pci, 1492 .ident = "Acer TravelMate 36x Laptop", 1493 .matches = { 1494 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1495 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1496 }, 1497 }, 1498 /* 1499 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1500 */ 1501 { 1502 .callback = disable_acpi_xsdt, 1503 .ident = "Advantech DAC-BJ01", 1504 .matches = { 1505 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1506 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1507 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1508 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1509 }, 1510 }, 1511 {} 1512}; 1513 1514/* second table for DMI checks that should run after early-quirks */ 1515static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1516 /* 1517 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1518 * which includes some code which overrides all temperature 1519 * trip points to 16C if the INTIN2 input of the I/O APIC 1520 * is enabled. This input is incorrectly designated the 1521 * ISA IRQ 0 via an interrupt source override even though 1522 * it is wired to the output of the master 8259A and INTIN0 1523 * is not connected at all. Force ignoring BIOS IRQ0 1524 * override in that cases. 1525 */ 1526 { 1527 .callback = dmi_ignore_irq0_timer_override, 1528 .ident = "HP nx6115 laptop", 1529 .matches = { 1530 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1531 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1532 }, 1533 }, 1534 { 1535 .callback = dmi_ignore_irq0_timer_override, 1536 .ident = "HP NX6125 laptop", 1537 .matches = { 1538 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1539 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1540 }, 1541 }, 1542 { 1543 .callback = dmi_ignore_irq0_timer_override, 1544 .ident = "HP NX6325 laptop", 1545 .matches = { 1546 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1547 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1548 }, 1549 }, 1550 { 1551 .callback = dmi_ignore_irq0_timer_override, 1552 .ident = "HP 6715b laptop", 1553 .matches = { 1554 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1555 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1556 }, 1557 }, 1558 { 1559 .callback = dmi_ignore_irq0_timer_override, 1560 .ident = "FUJITSU SIEMENS", 1561 .matches = { 1562 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1563 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1564 }, 1565 }, 1566 {} 1567}; 1568 1569/* 1570 * acpi_boot_table_init() and acpi_boot_init() 1571 * called from setup_arch(), always. 1572 * 1. checksums all tables 1573 * 2. enumerates lapics 1574 * 3. enumerates io-apics 1575 * 1576 * acpi_table_init() is separate to allow reading SRAT without 1577 * other side effects. 1578 * 1579 * side effects of acpi_boot_init: 1580 * acpi_lapic = 1 if LAPIC found 1581 * acpi_ioapic = 1 if IOAPIC found 1582 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1583 * if acpi_blacklisted() acpi_disabled = 1; 1584 * acpi_irq_model=... 1585 * ... 1586 */ 1587 1588void __init acpi_boot_table_init(void) 1589{ 1590 dmi_check_system(acpi_dmi_table); 1591 1592 /* 1593 * If acpi_disabled, bail out 1594 */ 1595 if (acpi_disabled) 1596 return; 1597 1598 /* 1599 * Initialize the ACPI boot-time table parser. 1600 */ 1601 if (acpi_locate_initial_tables()) 1602 disable_acpi(); 1603 else 1604 acpi_reserve_initial_tables(); 1605} 1606 1607int __init early_acpi_boot_init(void) 1608{ 1609 if (acpi_disabled) 1610 return 1; 1611 1612 acpi_table_init_complete(); 1613 1614 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1615 1616 /* 1617 * blacklist may disable ACPI entirely 1618 */ 1619 if (acpi_blacklisted()) { 1620 if (acpi_force) { 1621 pr_warn("acpi=force override\n"); 1622 } else { 1623 pr_warn("Disabling ACPI support\n"); 1624 disable_acpi(); 1625 return 1; 1626 } 1627 } 1628 1629 /* 1630 * Process the Multiple APIC Description Table (MADT), if present 1631 */ 1632 early_acpi_process_madt(); 1633 1634 /* 1635 * Hardware-reduced ACPI mode initialization: 1636 */ 1637 acpi_reduced_hw_init(); 1638 1639 return 0; 1640} 1641 1642int __init acpi_boot_init(void) 1643{ 1644 /* those are executed after early-quirks are executed */ 1645 dmi_check_system(acpi_dmi_table_late); 1646 1647 /* 1648 * If acpi_disabled, bail out 1649 */ 1650 if (acpi_disabled) 1651 return 1; 1652 1653 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1654 1655 /* 1656 * set sci_int and PM timer address 1657 */ 1658 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1659 1660 /* 1661 * Process the Multiple APIC Description Table (MADT), if present 1662 */ 1663 acpi_process_madt(); 1664 1665 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1666 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1667 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1668 1669 if (!acpi_noirq) 1670 x86_init.pci.init = pci_acpi_init; 1671 1672 /* Do not enable ACPI SPCR console by default */ 1673 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1674 return 0; 1675} 1676 1677static int __init parse_acpi(char *arg) 1678{ 1679 if (!arg) 1680 return -EINVAL; 1681 1682 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1683 if (strcmp(arg, "off") == 0) { 1684 disable_acpi(); 1685 } 1686 /* acpi=force to over-ride black-list */ 1687 else if (strcmp(arg, "force") == 0) { 1688 acpi_force = 1; 1689 acpi_disabled = 0; 1690 } 1691 /* acpi=strict disables out-of-spec workarounds */ 1692 else if (strcmp(arg, "strict") == 0) { 1693 acpi_strict = 1; 1694 } 1695 /* acpi=rsdt use RSDT instead of XSDT */ 1696 else if (strcmp(arg, "rsdt") == 0) { 1697 acpi_gbl_do_not_use_xsdt = TRUE; 1698 } 1699 /* "acpi=noirq" disables ACPI interrupt routing */ 1700 else if (strcmp(arg, "noirq") == 0) { 1701 acpi_noirq_set(); 1702 } 1703 /* "acpi=copy_dsdt" copies DSDT */ 1704 else if (strcmp(arg, "copy_dsdt") == 0) { 1705 acpi_gbl_copy_dsdt_locally = 1; 1706 } 1707 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1708 else if (strcmp(arg, "nocmcff") == 0) { 1709 acpi_disable_cmcff = 1; 1710 } else { 1711 /* Core will printk when we return error. */ 1712 return -EINVAL; 1713 } 1714 return 0; 1715} 1716early_param("acpi", parse_acpi); 1717 1718static int __init parse_acpi_bgrt(char *arg) 1719{ 1720 acpi_nobgrt = true; 1721 return 0; 1722} 1723early_param("bgrt_disable", parse_acpi_bgrt); 1724 1725/* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1726static int __init parse_pci(char *arg) 1727{ 1728 if (arg && strcmp(arg, "noacpi") == 0) 1729 acpi_disable_pci(); 1730 return 0; 1731} 1732early_param("pci", parse_pci); 1733 1734int __init acpi_mps_check(void) 1735{ 1736#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1737/* mptable code is not built-in*/ 1738 1739 /* 1740 * Xen disables ACPI in PV DomU guests but it still emulates APIC and 1741 * supports SMP. Returning early here ensures that APIC is not disabled 1742 * unnecessarily and the guest is not limited to a single vCPU. 1743 */ 1744 if (xen_pv_domain() && !xen_initial_domain()) 1745 return 0; 1746 1747 if (acpi_disabled || acpi_noirq) { 1748 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1749 return 1; 1750 } 1751#endif 1752 return 0; 1753} 1754 1755#ifdef CONFIG_X86_IO_APIC 1756static int __init parse_acpi_skip_timer_override(char *arg) 1757{ 1758 acpi_skip_timer_override = 1; 1759 return 0; 1760} 1761early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1762 1763static int __init parse_acpi_use_timer_override(char *arg) 1764{ 1765 acpi_use_timer_override = 1; 1766 return 0; 1767} 1768early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1769#endif /* CONFIG_X86_IO_APIC */ 1770 1771static int __init setup_acpi_sci(char *s) 1772{ 1773 if (!s) 1774 return -EINVAL; 1775 if (!strcmp(s, "edge")) 1776 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1777 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1778 else if (!strcmp(s, "level")) 1779 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1780 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1781 else if (!strcmp(s, "high")) 1782 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1783 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1784 else if (!strcmp(s, "low")) 1785 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1786 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1787 else 1788 return -EINVAL; 1789 return 0; 1790} 1791early_param("acpi_sci", setup_acpi_sci); 1792 1793int __acpi_acquire_global_lock(unsigned int *lock) 1794{ 1795 unsigned int old, new, val; 1796 1797 old = READ_ONCE(*lock); 1798 do { 1799 val = (old >> 1) & 0x1; 1800 new = (old & ~0x3) + 2 + val; 1801 } while (!try_cmpxchg(lock, &old, new)); 1802 1803 if (val) 1804 return 0; 1805 1806 return -1; 1807} 1808 1809int __acpi_release_global_lock(unsigned int *lock) 1810{ 1811 unsigned int old, new; 1812 1813 old = READ_ONCE(*lock); 1814 do { 1815 new = old & ~0x3; 1816 } while (!try_cmpxchg(lock, &old, new)); 1817 return old & 0x1; 1818} 1819 1820void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1821{ 1822 e820__range_add(addr, size, E820_TYPE_NVS); 1823 e820__update_table_print(); 1824} 1825 1826void x86_default_set_root_pointer(u64 addr) 1827{ 1828 boot_params.acpi_rsdp_addr = addr; 1829} 1830 1831u64 x86_default_get_root_pointer(void) 1832{ 1833 return boot_params.acpi_rsdp_addr; 1834} 1835 1836#ifdef CONFIG_XEN_PV 1837void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size) 1838{ 1839 return ioremap_cache(phys, size); 1840} 1841 1842void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, acpi_size size) = 1843 x86_acpi_os_ioremap; 1844EXPORT_SYMBOL_GPL(acpi_os_ioremap); 1845#endif
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