1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 4 * 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 7 */ 8 #define pr_fmt(fmt) "ACPI: " fmt 9 10 #include <linux/init.h> 11 #include <linux/acpi.h> 12 #include <linux/acpi_pmtmr.h> 13 #include <linux/efi.h> 14 #include <linux/cpumask.h> 15 #include <linux/export.h> 16 #include <linux/dmi.h> 17 #include <linux/irq.h> 18 #include <linux/slab.h> 19 #include <linux/memblock.h> 20 #include <linux/ioport.h> 21 #include <linux/pci.h> 22 #include <linux/efi-bgrt.h> 23 #include <linux/serial_core.h> 24 #include <linux/pgtable.h> 25 26 #include <asm/e820/api.h> 27 #include <asm/irqdomain.h> 28 #include <asm/pci_x86.h> 29 #include <asm/io_apic.h> 30 #include <asm/apic.h> 31 #include <asm/io.h> 32 #include <asm/mpspec.h> 33 #include <asm/smp.h> 34 #include <asm/i8259.h> 35 #include <asm/setup.h> 36 37 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 38 static int __initdata acpi_force = 0; 39 int acpi_disabled; 40 EXPORT_SYMBOL(acpi_disabled); 41 42 #ifdef CONFIG_X86_64 43 # include <asm/proto.h> 44 #endif /* X86 */ 45 46 int acpi_noirq; /* skip ACPI IRQ initialization */ 47 static int acpi_nobgrt; /* skip ACPI BGRT */ 48 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 49 EXPORT_SYMBOL(acpi_pci_disabled); 50 51 int acpi_lapic; 52 int acpi_ioapic; 53 int acpi_strict; 54 int acpi_disable_cmcff; 55 56 /* ACPI SCI override configuration */ 57 u8 acpi_sci_flags __initdata; 58 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 59 int acpi_skip_timer_override __initdata; 60 int acpi_use_timer_override __initdata; 61 int acpi_fix_pin2_polarity __initdata; 62 63 #ifdef CONFIG_X86_LOCAL_APIC 64 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 65 static bool acpi_support_online_capable; 66 #endif 67 68 #ifdef CONFIG_X86_IO_APIC 69 /* 70 * Locks related to IOAPIC hotplug 71 * Hotplug side: 72 * ->device_hotplug_lock 73 * ->acpi_ioapic_lock 74 * ->ioapic_lock 75 * Interrupt mapping side: 76 * ->acpi_ioapic_lock 77 * ->ioapic_mutex 78 * ->ioapic_lock 79 */ 80 static DEFINE_MUTEX(acpi_ioapic_lock); 81 #endif 82 83 /* -------------------------------------------------------------------------- 84 Boot-time Configuration 85 -------------------------------------------------------------------------- */ 86 87 /* 88 * The default interrupt routing model is PIC (8259). This gets 89 * overridden if IOAPICs are enumerated (below). 90 */ 91 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 92 93 94 /* 95 * ISA irqs by default are the first 16 gsis but can be 96 * any gsi as specified by an interrupt source override. 97 */ 98 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 99 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 100 }; 101 102 /* 103 * This is just a simple wrapper around early_memremap(), 104 * with sanity checks for phys == 0 and size == 0. 105 */ 106 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 107 { 108 109 if (!phys || !size) 110 return NULL; 111 112 return early_memremap(phys, size); 113 } 114 115 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 116 { 117 if (!map || !size) 118 return; 119 120 early_memunmap(map, size); 121 } 122 123 #ifdef CONFIG_X86_LOCAL_APIC 124 static int __init acpi_parse_madt(struct acpi_table_header *table) 125 { 126 struct acpi_table_madt *madt = NULL; 127 128 if (!boot_cpu_has(X86_FEATURE_APIC)) 129 return -EINVAL; 130 131 madt = (struct acpi_table_madt *)table; 132 if (!madt) { 133 pr_warn("Unable to map MADT\n"); 134 return -ENODEV; 135 } 136 137 if (madt->address) { 138 acpi_lapic_addr = (u64) madt->address; 139 140 pr_debug("Local APIC address 0x%08x\n", madt->address); 141 } 142 if (madt->header.revision >= 5) 143 acpi_support_online_capable = true; 144 145 default_acpi_madt_oem_check(madt->header.oem_id, 146 madt->header.oem_table_id); 147 148 return 0; 149 } 150 151 /** 152 * acpi_register_lapic - register a local apic and generates a logic cpu number 153 * @id: local apic id to register 154 * @acpiid: ACPI id to register 155 * @enabled: this cpu is enabled or not 156 * 157 * Returns the logic cpu number which maps to the local apic 158 */ 159 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 160 { 161 unsigned int ver = 0; 162 int cpu; 163 164 if (id >= MAX_LOCAL_APIC) { 165 pr_info("skipped apicid that is too big\n"); 166 return -EINVAL; 167 } 168 169 if (!enabled) { 170 ++disabled_cpus; 171 return -EINVAL; 172 } 173 174 if (boot_cpu_physical_apicid != -1U) 175 ver = boot_cpu_apic_version; 176 177 cpu = generic_processor_info(id, ver); 178 if (cpu >= 0) 179 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 180 181 return cpu; 182 } 183 184 static int __init 185 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 186 { 187 struct acpi_madt_local_x2apic *processor = NULL; 188 #ifdef CONFIG_X86_X2APIC 189 u32 apic_id; 190 u8 enabled; 191 #endif 192 193 processor = (struct acpi_madt_local_x2apic *)header; 194 195 if (BAD_MADT_ENTRY(processor, end)) 196 return -EINVAL; 197 198 acpi_table_print_madt_entry(&header->common); 199 200 #ifdef CONFIG_X86_X2APIC 201 apic_id = processor->local_apic_id; 202 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 203 204 /* Ignore invalid ID */ 205 if (apic_id == 0xffffffff) 206 return 0; 207 208 /* 209 * We need to register disabled CPU as well to permit 210 * counting disabled CPUs. This allows us to size 211 * cpus_possible_map more accurately, to permit 212 * to not preallocating memory for all NR_CPUS 213 * when we use CPU hotplug. 214 */ 215 if (!apic->apic_id_valid(apic_id)) { 216 if (enabled) 217 pr_warn("x2apic entry ignored\n"); 218 return 0; 219 } 220 221 acpi_register_lapic(apic_id, processor->uid, enabled); 222 #else 223 pr_warn("x2apic entry ignored\n"); 224 #endif 225 226 return 0; 227 } 228 229 static int __init 230 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 231 { 232 struct acpi_madt_local_apic *processor = NULL; 233 234 processor = (struct acpi_madt_local_apic *)header; 235 236 if (BAD_MADT_ENTRY(processor, end)) 237 return -EINVAL; 238 239 acpi_table_print_madt_entry(&header->common); 240 241 /* Ignore invalid ID */ 242 if (processor->id == 0xff) 243 return 0; 244 245 /* don't register processors that can not be onlined */ 246 if (acpi_support_online_capable && 247 !(processor->lapic_flags & ACPI_MADT_ENABLED) && 248 !(processor->lapic_flags & ACPI_MADT_ONLINE_CAPABLE)) 249 return 0; 250 251 /* 252 * We need to register disabled CPU as well to permit 253 * counting disabled CPUs. This allows us to size 254 * cpus_possible_map more accurately, to permit 255 * to not preallocating memory for all NR_CPUS 256 * when we use CPU hotplug. 257 */ 258 acpi_register_lapic(processor->id, /* APIC ID */ 259 processor->processor_id, /* ACPI ID */ 260 processor->lapic_flags & ACPI_MADT_ENABLED); 261 262 return 0; 263 } 264 265 static int __init 266 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 267 { 268 struct acpi_madt_local_sapic *processor = NULL; 269 270 processor = (struct acpi_madt_local_sapic *)header; 271 272 if (BAD_MADT_ENTRY(processor, end)) 273 return -EINVAL; 274 275 acpi_table_print_madt_entry(&header->common); 276 277 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 278 processor->processor_id, /* ACPI ID */ 279 processor->lapic_flags & ACPI_MADT_ENABLED); 280 281 return 0; 282 } 283 284 static int __init 285 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 286 const unsigned long end) 287 { 288 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 289 290 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 291 292 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 293 return -EINVAL; 294 295 acpi_table_print_madt_entry(&header->common); 296 297 acpi_lapic_addr = lapic_addr_ovr->address; 298 299 return 0; 300 } 301 302 static int __init 303 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 304 const unsigned long end) 305 { 306 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 307 308 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 309 310 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 311 return -EINVAL; 312 313 acpi_table_print_madt_entry(&header->common); 314 315 if (x2apic_nmi->lint != 1) 316 pr_warn("NMI not connected to LINT 1!\n"); 317 318 return 0; 319 } 320 321 static int __init 322 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 323 { 324 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 325 326 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 327 328 if (BAD_MADT_ENTRY(lapic_nmi, end)) 329 return -EINVAL; 330 331 acpi_table_print_madt_entry(&header->common); 332 333 if (lapic_nmi->lint != 1) 334 pr_warn("NMI not connected to LINT 1!\n"); 335 336 return 0; 337 } 338 339 #endif /*CONFIG_X86_LOCAL_APIC */ 340 341 #ifdef CONFIG_X86_IO_APIC 342 #define MP_ISA_BUS 0 343 344 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 345 u8 trigger, u32 gsi); 346 347 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 348 u32 gsi) 349 { 350 /* 351 * Check bus_irq boundary. 352 */ 353 if (bus_irq >= NR_IRQS_LEGACY) { 354 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 355 return; 356 } 357 358 /* 359 * TBD: This check is for faulty timer entries, where the override 360 * erroneously sets the trigger to level, resulting in a HUGE 361 * increase of timer interrupts! 362 */ 363 if ((bus_irq == 0) && (trigger == 3)) 364 trigger = 1; 365 366 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 367 return; 368 /* 369 * Reset default identity mapping if gsi is also an legacy IRQ, 370 * otherwise there will be more than one entry with the same GSI 371 * and acpi_isa_irq_to_gsi() may give wrong result. 372 */ 373 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 374 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 375 isa_irq_to_gsi[bus_irq] = gsi; 376 } 377 378 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 379 int polarity) 380 { 381 #ifdef CONFIG_X86_MPPARSE 382 struct mpc_intsrc mp_irq; 383 struct pci_dev *pdev; 384 unsigned char number; 385 unsigned int devfn; 386 int ioapic; 387 u8 pin; 388 389 if (!acpi_ioapic) 390 return 0; 391 if (!dev || !dev_is_pci(dev)) 392 return 0; 393 394 pdev = to_pci_dev(dev); 395 number = pdev->bus->number; 396 devfn = pdev->devfn; 397 pin = pdev->pin; 398 /* print the entry should happen on mptable identically */ 399 mp_irq.type = MP_INTSRC; 400 mp_irq.irqtype = mp_INT; 401 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 402 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 403 mp_irq.srcbus = number; 404 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 405 ioapic = mp_find_ioapic(gsi); 406 mp_irq.dstapic = mpc_ioapic_id(ioapic); 407 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 408 409 mp_save_irq(&mp_irq); 410 #endif 411 return 0; 412 } 413 414 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 415 u8 trigger, u32 gsi) 416 { 417 struct mpc_intsrc mp_irq; 418 int ioapic, pin; 419 420 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 421 ioapic = mp_find_ioapic(gsi); 422 if (ioapic < 0) { 423 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 424 return ioapic; 425 } 426 427 pin = mp_find_ioapic_pin(ioapic, gsi); 428 429 mp_irq.type = MP_INTSRC; 430 mp_irq.irqtype = mp_INT; 431 mp_irq.irqflag = (trigger << 2) | polarity; 432 mp_irq.srcbus = MP_ISA_BUS; 433 mp_irq.srcbusirq = bus_irq; 434 mp_irq.dstapic = mpc_ioapic_id(ioapic); 435 mp_irq.dstirq = pin; 436 437 mp_save_irq(&mp_irq); 438 439 return 0; 440 } 441 442 static int __init 443 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 444 { 445 struct acpi_madt_io_apic *ioapic = NULL; 446 struct ioapic_domain_cfg cfg = { 447 .type = IOAPIC_DOMAIN_DYNAMIC, 448 .ops = &mp_ioapic_irqdomain_ops, 449 }; 450 451 ioapic = (struct acpi_madt_io_apic *)header; 452 453 if (BAD_MADT_ENTRY(ioapic, end)) 454 return -EINVAL; 455 456 acpi_table_print_madt_entry(&header->common); 457 458 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 459 if (ioapic->global_irq_base < nr_legacy_irqs()) 460 cfg.type = IOAPIC_DOMAIN_LEGACY; 461 462 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 463 &cfg); 464 465 return 0; 466 } 467 468 /* 469 * Parse Interrupt Source Override for the ACPI SCI 470 */ 471 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 472 { 473 if (trigger == 0) /* compatible SCI trigger is level */ 474 trigger = 3; 475 476 if (polarity == 0) /* compatible SCI polarity is low */ 477 polarity = 3; 478 479 /* Command-line over-ride via acpi_sci= */ 480 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 481 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 482 483 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 484 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 485 486 if (bus_irq < NR_IRQS_LEGACY) 487 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 488 else 489 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 490 491 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 492 493 /* 494 * stash over-ride to indicate we've been here 495 * and for later update of acpi_gbl_FADT 496 */ 497 acpi_sci_override_gsi = gsi; 498 return; 499 } 500 501 static int __init 502 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 503 const unsigned long end) 504 { 505 struct acpi_madt_interrupt_override *intsrc = NULL; 506 507 intsrc = (struct acpi_madt_interrupt_override *)header; 508 509 if (BAD_MADT_ENTRY(intsrc, end)) 510 return -EINVAL; 511 512 acpi_table_print_madt_entry(&header->common); 513 514 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 515 acpi_sci_ioapic_setup(intsrc->source_irq, 516 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 517 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 518 intsrc->global_irq); 519 return 0; 520 } 521 522 if (intsrc->source_irq == 0) { 523 if (acpi_skip_timer_override) { 524 pr_warn("BIOS IRQ0 override ignored.\n"); 525 return 0; 526 } 527 528 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 529 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 530 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 531 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 532 } 533 } 534 535 mp_override_legacy_irq(intsrc->source_irq, 536 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 537 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 538 intsrc->global_irq); 539 540 return 0; 541 } 542 543 static int __init 544 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 545 { 546 struct acpi_madt_nmi_source *nmi_src = NULL; 547 548 nmi_src = (struct acpi_madt_nmi_source *)header; 549 550 if (BAD_MADT_ENTRY(nmi_src, end)) 551 return -EINVAL; 552 553 acpi_table_print_madt_entry(&header->common); 554 555 /* TBD: Support nimsrc entries? */ 556 557 return 0; 558 } 559 560 #endif /* CONFIG_X86_IO_APIC */ 561 562 /* 563 * acpi_pic_sci_set_trigger() 564 * 565 * use ELCR to set PIC-mode trigger type for SCI 566 * 567 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 568 * it may require Edge Trigger -- use "acpi_sci=edge" 569 * 570 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 571 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 572 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 573 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 574 */ 575 576 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 577 { 578 unsigned int mask = 1 << irq; 579 unsigned int old, new; 580 581 /* Real old ELCR mask */ 582 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 583 584 /* 585 * If we use ACPI to set PCI IRQs, then we should clear ELCR 586 * since we will set it correctly as we enable the PCI irq 587 * routing. 588 */ 589 new = acpi_noirq ? old : 0; 590 591 /* 592 * Update SCI information in the ELCR, it isn't in the PCI 593 * routing tables.. 594 */ 595 switch (trigger) { 596 case 1: /* Edge - clear */ 597 new &= ~mask; 598 break; 599 case 3: /* Level - set */ 600 new |= mask; 601 break; 602 } 603 604 if (old == new) 605 return; 606 607 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 608 outb(new, PIC_ELCR1); 609 outb(new >> 8, PIC_ELCR2); 610 } 611 612 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 613 { 614 int rc, irq, trigger, polarity; 615 616 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 617 *irqp = gsi; 618 return 0; 619 } 620 621 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 622 if (rc) 623 return rc; 624 625 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 626 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 627 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 628 if (irq < 0) 629 return irq; 630 631 *irqp = irq; 632 return 0; 633 } 634 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 635 636 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 637 { 638 if (isa_irq < nr_legacy_irqs() && 639 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 640 *gsi = isa_irq_to_gsi[isa_irq]; 641 return 0; 642 } 643 644 return -1; 645 } 646 647 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 648 int trigger, int polarity) 649 { 650 #ifdef CONFIG_PCI 651 /* 652 * Make sure all (legacy) PCI IRQs are set as level-triggered. 653 */ 654 if (trigger == ACPI_LEVEL_SENSITIVE) 655 elcr_set_level_irq(gsi); 656 #endif 657 658 return gsi; 659 } 660 661 #ifdef CONFIG_X86_LOCAL_APIC 662 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 663 int trigger, int polarity) 664 { 665 int irq = gsi; 666 #ifdef CONFIG_X86_IO_APIC 667 int node; 668 struct irq_alloc_info info; 669 670 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 671 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 672 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 673 ioapic_set_alloc_attr(&info, node, trigger, polarity); 674 675 mutex_lock(&acpi_ioapic_lock); 676 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 677 /* Don't set up the ACPI SCI because it's already set up */ 678 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 679 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 680 mutex_unlock(&acpi_ioapic_lock); 681 #endif 682 683 return irq; 684 } 685 686 static void acpi_unregister_gsi_ioapic(u32 gsi) 687 { 688 #ifdef CONFIG_X86_IO_APIC 689 int irq; 690 691 mutex_lock(&acpi_ioapic_lock); 692 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 693 if (irq > 0) 694 mp_unmap_irq(irq); 695 mutex_unlock(&acpi_ioapic_lock); 696 #endif 697 } 698 #endif 699 700 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 701 int trigger, int polarity) = acpi_register_gsi_pic; 702 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 703 704 #ifdef CONFIG_ACPI_SLEEP 705 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 706 #else 707 int (*acpi_suspend_lowlevel)(void); 708 #endif 709 710 /* 711 * success: return IRQ number (>=0) 712 * failure: return < 0 713 */ 714 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 715 { 716 return __acpi_register_gsi(dev, gsi, trigger, polarity); 717 } 718 EXPORT_SYMBOL_GPL(acpi_register_gsi); 719 720 void acpi_unregister_gsi(u32 gsi) 721 { 722 if (__acpi_unregister_gsi) 723 __acpi_unregister_gsi(gsi); 724 } 725 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 726 727 #ifdef CONFIG_X86_LOCAL_APIC 728 static void __init acpi_set_irq_model_ioapic(void) 729 { 730 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 731 __acpi_register_gsi = acpi_register_gsi_ioapic; 732 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 733 acpi_ioapic = 1; 734 } 735 #endif 736 737 /* 738 * ACPI based hotplug support for CPU 739 */ 740 #ifdef CONFIG_ACPI_HOTPLUG_CPU 741 #include <acpi/processor.h> 742 743 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 744 { 745 #ifdef CONFIG_ACPI_NUMA 746 int nid; 747 748 nid = acpi_get_node(handle); 749 if (nid != NUMA_NO_NODE) { 750 set_apicid_to_node(physid, nid); 751 numa_set_node(cpu, nid); 752 } 753 #endif 754 return 0; 755 } 756 757 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 758 int *pcpu) 759 { 760 int cpu; 761 762 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 763 if (cpu < 0) { 764 pr_info("Unable to map lapic to logical cpu number\n"); 765 return cpu; 766 } 767 768 acpi_processor_set_pdc(handle); 769 acpi_map_cpu2node(handle, cpu, physid); 770 771 *pcpu = cpu; 772 return 0; 773 } 774 EXPORT_SYMBOL(acpi_map_cpu); 775 776 int acpi_unmap_cpu(int cpu) 777 { 778 #ifdef CONFIG_ACPI_NUMA 779 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 780 #endif 781 782 per_cpu(x86_cpu_to_apicid, cpu) = -1; 783 set_cpu_present(cpu, false); 784 num_processors--; 785 786 return (0); 787 } 788 EXPORT_SYMBOL(acpi_unmap_cpu); 789 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 790 791 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 792 { 793 int ret = -ENOSYS; 794 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 795 int ioapic_id; 796 u64 addr; 797 struct ioapic_domain_cfg cfg = { 798 .type = IOAPIC_DOMAIN_DYNAMIC, 799 .ops = &mp_ioapic_irqdomain_ops, 800 }; 801 802 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 803 if (ioapic_id < 0) { 804 unsigned long long uid; 805 acpi_status status; 806 807 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 808 NULL, &uid); 809 if (ACPI_FAILURE(status)) { 810 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 811 return -EINVAL; 812 } 813 ioapic_id = (int)uid; 814 } 815 816 mutex_lock(&acpi_ioapic_lock); 817 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 818 mutex_unlock(&acpi_ioapic_lock); 819 #endif 820 821 return ret; 822 } 823 EXPORT_SYMBOL(acpi_register_ioapic); 824 825 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 826 { 827 int ret = -ENOSYS; 828 829 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 830 mutex_lock(&acpi_ioapic_lock); 831 ret = mp_unregister_ioapic(gsi_base); 832 mutex_unlock(&acpi_ioapic_lock); 833 #endif 834 835 return ret; 836 } 837 EXPORT_SYMBOL(acpi_unregister_ioapic); 838 839 /** 840 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 841 * has been registered 842 * @handle: ACPI handle of the IOAPIC device 843 * @gsi_base: GSI base associated with the IOAPIC 844 * 845 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 846 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 847 */ 848 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 849 { 850 int ret = 0; 851 852 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 853 mutex_lock(&acpi_ioapic_lock); 854 ret = mp_ioapic_registered(gsi_base); 855 mutex_unlock(&acpi_ioapic_lock); 856 #endif 857 858 return ret; 859 } 860 861 static int __init acpi_parse_sbf(struct acpi_table_header *table) 862 { 863 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 864 865 sbf_port = sb->cmos_index; /* Save CMOS port */ 866 867 return 0; 868 } 869 870 #ifdef CONFIG_HPET_TIMER 871 #include <asm/hpet.h> 872 873 static struct resource *hpet_res __initdata; 874 875 static int __init acpi_parse_hpet(struct acpi_table_header *table) 876 { 877 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 878 879 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 880 pr_warn("HPET timers must be located in memory.\n"); 881 return -1; 882 } 883 884 hpet_address = hpet_tbl->address.address; 885 hpet_blockid = hpet_tbl->sequence; 886 887 /* 888 * Some broken BIOSes advertise HPET at 0x0. We really do not 889 * want to allocate a resource there. 890 */ 891 if (!hpet_address) { 892 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 893 return 0; 894 } 895 #ifdef CONFIG_X86_64 896 /* 897 * Some even more broken BIOSes advertise HPET at 898 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 899 * some noise: 900 */ 901 if (hpet_address == 0xfed0000000000000UL) { 902 if (!hpet_force_user) { 903 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 904 hpet_tbl->id); 905 hpet_address = 0; 906 return 0; 907 } 908 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 909 hpet_tbl->id); 910 hpet_address >>= 32; 911 } 912 #endif 913 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 914 915 /* 916 * Allocate and initialize the HPET firmware resource for adding into 917 * the resource tree during the lateinit timeframe. 918 */ 919 #define HPET_RESOURCE_NAME_SIZE 9 920 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 921 SMP_CACHE_BYTES); 922 if (!hpet_res) 923 panic("%s: Failed to allocate %zu bytes\n", __func__, 924 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 925 926 hpet_res->name = (void *)&hpet_res[1]; 927 hpet_res->flags = IORESOURCE_MEM; 928 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 929 hpet_tbl->sequence); 930 931 hpet_res->start = hpet_address; 932 hpet_res->end = hpet_address + (1 * 1024) - 1; 933 934 return 0; 935 } 936 937 /* 938 * hpet_insert_resource inserts the HPET resources used into the resource 939 * tree. 940 */ 941 static __init int hpet_insert_resource(void) 942 { 943 if (!hpet_res) 944 return 1; 945 946 return insert_resource(&iomem_resource, hpet_res); 947 } 948 949 late_initcall(hpet_insert_resource); 950 951 #else 952 #define acpi_parse_hpet NULL 953 #endif 954 955 static int __init acpi_parse_fadt(struct acpi_table_header *table) 956 { 957 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 958 pr_debug("no legacy devices present\n"); 959 x86_platform.legacy.devices.pnpbios = 0; 960 } 961 962 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 963 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 964 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 965 pr_debug("i8042 controller is absent\n"); 966 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 967 } 968 969 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 970 pr_debug("not registering RTC platform device\n"); 971 x86_platform.legacy.rtc = 0; 972 } 973 974 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 975 pr_debug("probing for VGA not safe\n"); 976 x86_platform.legacy.no_vga = 1; 977 } 978 979 #ifdef CONFIG_X86_PM_TIMER 980 /* detect the location of the ACPI PM Timer */ 981 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 982 /* FADT rev. 2 */ 983 if (acpi_gbl_FADT.xpm_timer_block.space_id != 984 ACPI_ADR_SPACE_SYSTEM_IO) 985 return 0; 986 987 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 988 /* 989 * "X" fields are optional extensions to the original V1.0 990 * fields, so we must selectively expand V1.0 fields if the 991 * corresponding X field is zero. 992 */ 993 if (!pmtmr_ioport) 994 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 995 } else { 996 /* FADT rev. 1 */ 997 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 998 } 999 if (pmtmr_ioport) 1000 pr_info("PM-Timer IO Port: %#x\n", 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 1011 static 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 pr_err("Error parsing LAPIC address override entry\n"); 1027 return count; 1028 } 1029 1030 register_lapic_address(acpi_lapic_addr); 1031 1032 return count; 1033 } 1034 1035 static int __init acpi_parse_madt_lapic_entries(void) 1036 { 1037 int count; 1038 int x2count = 0; 1039 int ret; 1040 struct acpi_subtable_proc madt_proc[2]; 1041 1042 if (!boot_cpu_has(X86_FEATURE_APIC)) 1043 return -ENODEV; 1044 1045 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1046 acpi_parse_sapic, MAX_LOCAL_APIC); 1047 1048 if (!count) { 1049 memset(madt_proc, 0, sizeof(madt_proc)); 1050 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1051 madt_proc[0].handler = acpi_parse_lapic; 1052 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1053 madt_proc[1].handler = acpi_parse_x2apic; 1054 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1055 sizeof(struct acpi_table_madt), 1056 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1057 if (ret < 0) { 1058 pr_err("Error parsing LAPIC/X2APIC entries\n"); 1059 return ret; 1060 } 1061 1062 count = madt_proc[0].count; 1063 x2count = madt_proc[1].count; 1064 } 1065 if (!count && !x2count) { 1066 pr_err("No LAPIC entries present\n"); 1067 /* TBD: Cleanup to allow fallback to MPS */ 1068 return -ENODEV; 1069 } else if (count < 0 || x2count < 0) { 1070 pr_err("Error parsing LAPIC entry\n"); 1071 /* TBD: Cleanup to allow fallback to MPS */ 1072 return count; 1073 } 1074 1075 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1076 acpi_parse_x2apic_nmi, 0); 1077 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1078 acpi_parse_lapic_nmi, 0); 1079 if (count < 0 || x2count < 0) { 1080 pr_err("Error parsing LAPIC NMI entry\n"); 1081 /* TBD: Cleanup to allow fallback to MPS */ 1082 return count; 1083 } 1084 return 0; 1085 } 1086 #endif /* CONFIG_X86_LOCAL_APIC */ 1087 1088 #ifdef CONFIG_X86_IO_APIC 1089 static void __init mp_config_acpi_legacy_irqs(void) 1090 { 1091 int i; 1092 struct mpc_intsrc mp_irq; 1093 1094 #ifdef CONFIG_EISA 1095 /* 1096 * Fabricate the legacy ISA bus (bus #31). 1097 */ 1098 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1099 #endif 1100 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1101 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1102 1103 /* 1104 * Use the default configuration for the IRQs 0-15. Unless 1105 * overridden by (MADT) interrupt source override entries. 1106 */ 1107 for (i = 0; i < nr_legacy_irqs(); i++) { 1108 int ioapic, pin; 1109 unsigned int dstapic; 1110 int idx; 1111 u32 gsi; 1112 1113 /* Locate the gsi that irq i maps to. */ 1114 if (acpi_isa_irq_to_gsi(i, &gsi)) 1115 continue; 1116 1117 /* 1118 * Locate the IOAPIC that manages the ISA IRQ. 1119 */ 1120 ioapic = mp_find_ioapic(gsi); 1121 if (ioapic < 0) 1122 continue; 1123 pin = mp_find_ioapic_pin(ioapic, gsi); 1124 dstapic = mpc_ioapic_id(ioapic); 1125 1126 for (idx = 0; idx < mp_irq_entries; idx++) { 1127 struct mpc_intsrc *irq = mp_irqs + idx; 1128 1129 /* Do we already have a mapping for this ISA IRQ? */ 1130 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1131 break; 1132 1133 /* Do we already have a mapping for this IOAPIC pin */ 1134 if (irq->dstapic == dstapic && irq->dstirq == pin) 1135 break; 1136 } 1137 1138 if (idx != mp_irq_entries) { 1139 pr_debug("ACPI: IRQ%d used by override.\n", i); 1140 continue; /* IRQ already used */ 1141 } 1142 1143 mp_irq.type = MP_INTSRC; 1144 mp_irq.irqflag = 0; /* Conforming */ 1145 mp_irq.srcbus = MP_ISA_BUS; 1146 mp_irq.dstapic = dstapic; 1147 mp_irq.irqtype = mp_INT; 1148 mp_irq.srcbusirq = i; /* Identity mapped */ 1149 mp_irq.dstirq = pin; 1150 1151 mp_save_irq(&mp_irq); 1152 } 1153 } 1154 1155 /* 1156 * Parse IOAPIC related entries in MADT 1157 * returns 0 on success, < 0 on error 1158 */ 1159 static int __init acpi_parse_madt_ioapic_entries(void) 1160 { 1161 int count; 1162 1163 /* 1164 * ACPI interpreter is required to complete interrupt setup, 1165 * so if it is off, don't enumerate the io-apics with ACPI. 1166 * If MPS is present, it will handle them, 1167 * otherwise the system will stay in PIC mode 1168 */ 1169 if (acpi_disabled || acpi_noirq) 1170 return -ENODEV; 1171 1172 if (!boot_cpu_has(X86_FEATURE_APIC)) 1173 return -ENODEV; 1174 1175 /* 1176 * if "noapic" boot option, don't look for IO-APICs 1177 */ 1178 if (skip_ioapic_setup) { 1179 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1180 return -ENODEV; 1181 } 1182 1183 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1184 MAX_IO_APICS); 1185 if (!count) { 1186 pr_err("No IOAPIC entries present\n"); 1187 return -ENODEV; 1188 } else if (count < 0) { 1189 pr_err("Error parsing IOAPIC entry\n"); 1190 return count; 1191 } 1192 1193 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1194 acpi_parse_int_src_ovr, nr_irqs); 1195 if (count < 0) { 1196 pr_err("Error parsing interrupt source overrides entry\n"); 1197 /* TBD: Cleanup to allow fallback to MPS */ 1198 return count; 1199 } 1200 1201 /* 1202 * If BIOS did not supply an INT_SRC_OVR for the SCI 1203 * pretend we got one so we can set the SCI flags. 1204 * But ignore setting up SCI on hardware reduced platforms. 1205 */ 1206 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1207 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1208 acpi_gbl_FADT.sci_interrupt); 1209 1210 /* Fill in identity legacy mappings where no override */ 1211 mp_config_acpi_legacy_irqs(); 1212 1213 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1214 acpi_parse_nmi_src, nr_irqs); 1215 if (count < 0) { 1216 pr_err("Error parsing NMI SRC entry\n"); 1217 /* TBD: Cleanup to allow fallback to MPS */ 1218 return count; 1219 } 1220 1221 return 0; 1222 } 1223 #else 1224 static inline int acpi_parse_madt_ioapic_entries(void) 1225 { 1226 return -1; 1227 } 1228 #endif /* !CONFIG_X86_IO_APIC */ 1229 1230 static void __init early_acpi_process_madt(void) 1231 { 1232 #ifdef CONFIG_X86_LOCAL_APIC 1233 int error; 1234 1235 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1236 1237 /* 1238 * Parse MADT LAPIC entries 1239 */ 1240 error = early_acpi_parse_madt_lapic_addr_ovr(); 1241 if (!error) { 1242 acpi_lapic = 1; 1243 smp_found_config = 1; 1244 } 1245 if (error == -EINVAL) { 1246 /* 1247 * Dell Precision Workstation 410, 610 come here. 1248 */ 1249 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1250 disable_acpi(); 1251 } 1252 } 1253 #endif 1254 } 1255 1256 static void __init acpi_process_madt(void) 1257 { 1258 #ifdef CONFIG_X86_LOCAL_APIC 1259 int error; 1260 1261 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1262 1263 /* 1264 * Parse MADT LAPIC entries 1265 */ 1266 error = acpi_parse_madt_lapic_entries(); 1267 if (!error) { 1268 acpi_lapic = 1; 1269 1270 /* 1271 * Parse MADT IO-APIC entries 1272 */ 1273 mutex_lock(&acpi_ioapic_lock); 1274 error = acpi_parse_madt_ioapic_entries(); 1275 mutex_unlock(&acpi_ioapic_lock); 1276 if (!error) { 1277 acpi_set_irq_model_ioapic(); 1278 1279 smp_found_config = 1; 1280 } 1281 } 1282 if (error == -EINVAL) { 1283 /* 1284 * Dell Precision Workstation 410, 610 come here. 1285 */ 1286 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1287 disable_acpi(); 1288 } 1289 } else { 1290 /* 1291 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1292 * In the event an MPS table was found, forget it. 1293 * Boot with "acpi=off" to use MPS on such a system. 1294 */ 1295 if (smp_found_config) { 1296 pr_warn("No APIC-table, disabling MPS\n"); 1297 smp_found_config = 0; 1298 } 1299 } 1300 1301 /* 1302 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1303 * processors, where MPS only supports physical. 1304 */ 1305 if (acpi_lapic && acpi_ioapic) 1306 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1307 else if (acpi_lapic) 1308 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1309 #endif 1310 return; 1311 } 1312 1313 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1314 { 1315 if (!acpi_force) { 1316 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1317 acpi_noirq_set(); 1318 } 1319 return 0; 1320 } 1321 1322 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1323 { 1324 if (!acpi_force) { 1325 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1326 acpi_disable_pci(); 1327 } 1328 return 0; 1329 } 1330 1331 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1332 { 1333 if (!acpi_force) { 1334 pr_notice("%s detected: acpi off\n", d->ident); 1335 disable_acpi(); 1336 } else { 1337 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1338 } 1339 return 0; 1340 } 1341 1342 /* 1343 * Force ignoring BIOS IRQ0 override 1344 */ 1345 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1346 { 1347 if (!acpi_skip_timer_override) { 1348 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1349 d->ident); 1350 acpi_skip_timer_override = 1; 1351 } 1352 return 0; 1353 } 1354 1355 /* 1356 * ACPI offers an alternative platform interface model that removes 1357 * ACPI hardware requirements for platforms that do not implement 1358 * the PC Architecture. 1359 * 1360 * We initialize the Hardware-reduced ACPI model here: 1361 */ 1362 void __init acpi_generic_reduced_hw_init(void) 1363 { 1364 /* 1365 * Override x86_init functions and bypass legacy PIC in 1366 * hardware reduced ACPI mode. 1367 */ 1368 x86_init.timers.timer_init = x86_init_noop; 1369 x86_init.irqs.pre_vector_init = x86_init_noop; 1370 legacy_pic = &null_legacy_pic; 1371 } 1372 1373 static void __init acpi_reduced_hw_init(void) 1374 { 1375 if (acpi_gbl_reduced_hardware) 1376 x86_init.acpi.reduced_hw_early_init(); 1377 } 1378 1379 /* 1380 * If your system is blacklisted here, but you find that acpi=force 1381 * works for you, please contact linux-acpi@vger.kernel.org 1382 */ 1383 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1384 /* 1385 * Boxes that need ACPI disabled 1386 */ 1387 { 1388 .callback = dmi_disable_acpi, 1389 .ident = "IBM Thinkpad", 1390 .matches = { 1391 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1392 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1393 }, 1394 }, 1395 1396 /* 1397 * Boxes that need ACPI PCI IRQ routing disabled 1398 */ 1399 { 1400 .callback = disable_acpi_irq, 1401 .ident = "ASUS A7V", 1402 .matches = { 1403 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1404 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1405 /* newer BIOS, Revision 1011, does work */ 1406 DMI_MATCH(DMI_BIOS_VERSION, 1407 "ASUS A7V ACPI BIOS Revision 1007"), 1408 }, 1409 }, 1410 { 1411 /* 1412 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1413 * for LPC bridge, which is needed for the PCI 1414 * interrupt links to work. DSDT fix is in bug 5966. 1415 * 2645, 2646 model numbers are shared with 600/600E/600X 1416 */ 1417 .callback = disable_acpi_irq, 1418 .ident = "IBM Thinkpad 600 Series 2645", 1419 .matches = { 1420 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1421 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1422 }, 1423 }, 1424 { 1425 .callback = disable_acpi_irq, 1426 .ident = "IBM Thinkpad 600 Series 2646", 1427 .matches = { 1428 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1429 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1430 }, 1431 }, 1432 /* 1433 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1434 */ 1435 { /* _BBN 0 bug */ 1436 .callback = disable_acpi_pci, 1437 .ident = "ASUS PR-DLS", 1438 .matches = { 1439 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1440 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1441 DMI_MATCH(DMI_BIOS_VERSION, 1442 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1443 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1444 }, 1445 }, 1446 { 1447 .callback = disable_acpi_pci, 1448 .ident = "Acer TravelMate 36x Laptop", 1449 .matches = { 1450 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1451 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1452 }, 1453 }, 1454 {} 1455 }; 1456 1457 /* second table for DMI checks that should run after early-quirks */ 1458 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1459 /* 1460 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1461 * which includes some code which overrides all temperature 1462 * trip points to 16C if the INTIN2 input of the I/O APIC 1463 * is enabled. This input is incorrectly designated the 1464 * ISA IRQ 0 via an interrupt source override even though 1465 * it is wired to the output of the master 8259A and INTIN0 1466 * is not connected at all. Force ignoring BIOS IRQ0 1467 * override in that cases. 1468 */ 1469 { 1470 .callback = dmi_ignore_irq0_timer_override, 1471 .ident = "HP nx6115 laptop", 1472 .matches = { 1473 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1474 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1475 }, 1476 }, 1477 { 1478 .callback = dmi_ignore_irq0_timer_override, 1479 .ident = "HP NX6125 laptop", 1480 .matches = { 1481 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1482 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1483 }, 1484 }, 1485 { 1486 .callback = dmi_ignore_irq0_timer_override, 1487 .ident = "HP NX6325 laptop", 1488 .matches = { 1489 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1490 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1491 }, 1492 }, 1493 { 1494 .callback = dmi_ignore_irq0_timer_override, 1495 .ident = "HP 6715b laptop", 1496 .matches = { 1497 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1498 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1499 }, 1500 }, 1501 { 1502 .callback = dmi_ignore_irq0_timer_override, 1503 .ident = "FUJITSU SIEMENS", 1504 .matches = { 1505 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1506 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1507 }, 1508 }, 1509 {} 1510 }; 1511 1512 /* 1513 * acpi_boot_table_init() and acpi_boot_init() 1514 * called from setup_arch(), always. 1515 * 1. checksums all tables 1516 * 2. enumerates lapics 1517 * 3. enumerates io-apics 1518 * 1519 * acpi_table_init() is separate to allow reading SRAT without 1520 * other side effects. 1521 * 1522 * side effects of acpi_boot_init: 1523 * acpi_lapic = 1 if LAPIC found 1524 * acpi_ioapic = 1 if IOAPIC found 1525 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1526 * if acpi_blacklisted() acpi_disabled = 1; 1527 * acpi_irq_model=... 1528 * ... 1529 */ 1530 1531 void __init acpi_boot_table_init(void) 1532 { 1533 dmi_check_system(acpi_dmi_table); 1534 1535 /* 1536 * If acpi_disabled, bail out 1537 */ 1538 if (acpi_disabled) 1539 return; 1540 1541 /* 1542 * Initialize the ACPI boot-time table parser. 1543 */ 1544 if (acpi_locate_initial_tables()) 1545 disable_acpi(); 1546 else 1547 acpi_reserve_initial_tables(); 1548 } 1549 1550 int __init early_acpi_boot_init(void) 1551 { 1552 if (acpi_disabled) 1553 return 1; 1554 1555 acpi_table_init_complete(); 1556 1557 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1558 1559 /* 1560 * blacklist may disable ACPI entirely 1561 */ 1562 if (acpi_blacklisted()) { 1563 if (acpi_force) { 1564 pr_warn("acpi=force override\n"); 1565 } else { 1566 pr_warn("Disabling ACPI support\n"); 1567 disable_acpi(); 1568 return 1; 1569 } 1570 } 1571 1572 /* 1573 * Process the Multiple APIC Description Table (MADT), if present 1574 */ 1575 early_acpi_process_madt(); 1576 1577 /* 1578 * Hardware-reduced ACPI mode initialization: 1579 */ 1580 acpi_reduced_hw_init(); 1581 1582 return 0; 1583 } 1584 1585 int __init acpi_boot_init(void) 1586 { 1587 /* those are executed after early-quirks are executed */ 1588 dmi_check_system(acpi_dmi_table_late); 1589 1590 /* 1591 * If acpi_disabled, bail out 1592 */ 1593 if (acpi_disabled) 1594 return 1; 1595 1596 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1597 1598 /* 1599 * set sci_int and PM timer address 1600 */ 1601 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1602 1603 /* 1604 * Process the Multiple APIC Description Table (MADT), if present 1605 */ 1606 acpi_process_madt(); 1607 1608 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1609 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1610 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1611 1612 if (!acpi_noirq) 1613 x86_init.pci.init = pci_acpi_init; 1614 1615 /* Do not enable ACPI SPCR console by default */ 1616 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1617 return 0; 1618 } 1619 1620 static int __init parse_acpi(char *arg) 1621 { 1622 if (!arg) 1623 return -EINVAL; 1624 1625 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1626 if (strcmp(arg, "off") == 0) { 1627 disable_acpi(); 1628 } 1629 /* acpi=force to over-ride black-list */ 1630 else if (strcmp(arg, "force") == 0) { 1631 acpi_force = 1; 1632 acpi_disabled = 0; 1633 } 1634 /* acpi=strict disables out-of-spec workarounds */ 1635 else if (strcmp(arg, "strict") == 0) { 1636 acpi_strict = 1; 1637 } 1638 /* acpi=rsdt use RSDT instead of XSDT */ 1639 else if (strcmp(arg, "rsdt") == 0) { 1640 acpi_gbl_do_not_use_xsdt = TRUE; 1641 } 1642 /* "acpi=noirq" disables ACPI interrupt routing */ 1643 else if (strcmp(arg, "noirq") == 0) { 1644 acpi_noirq_set(); 1645 } 1646 /* "acpi=copy_dsdt" copies DSDT */ 1647 else if (strcmp(arg, "copy_dsdt") == 0) { 1648 acpi_gbl_copy_dsdt_locally = 1; 1649 } 1650 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1651 else if (strcmp(arg, "nocmcff") == 0) { 1652 acpi_disable_cmcff = 1; 1653 } else { 1654 /* Core will printk when we return error. */ 1655 return -EINVAL; 1656 } 1657 return 0; 1658 } 1659 early_param("acpi", parse_acpi); 1660 1661 static int __init parse_acpi_bgrt(char *arg) 1662 { 1663 acpi_nobgrt = true; 1664 return 0; 1665 } 1666 early_param("bgrt_disable", parse_acpi_bgrt); 1667 1668 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1669 static int __init parse_pci(char *arg) 1670 { 1671 if (arg && strcmp(arg, "noacpi") == 0) 1672 acpi_disable_pci(); 1673 return 0; 1674 } 1675 early_param("pci", parse_pci); 1676 1677 int __init acpi_mps_check(void) 1678 { 1679 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1680 /* mptable code is not built-in*/ 1681 if (acpi_disabled || acpi_noirq) { 1682 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1683 return 1; 1684 } 1685 #endif 1686 return 0; 1687 } 1688 1689 #ifdef CONFIG_X86_IO_APIC 1690 static int __init parse_acpi_skip_timer_override(char *arg) 1691 { 1692 acpi_skip_timer_override = 1; 1693 return 0; 1694 } 1695 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1696 1697 static int __init parse_acpi_use_timer_override(char *arg) 1698 { 1699 acpi_use_timer_override = 1; 1700 return 0; 1701 } 1702 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1703 #endif /* CONFIG_X86_IO_APIC */ 1704 1705 static int __init setup_acpi_sci(char *s) 1706 { 1707 if (!s) 1708 return -EINVAL; 1709 if (!strcmp(s, "edge")) 1710 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1711 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1712 else if (!strcmp(s, "level")) 1713 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1714 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1715 else if (!strcmp(s, "high")) 1716 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1717 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1718 else if (!strcmp(s, "low")) 1719 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1720 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1721 else 1722 return -EINVAL; 1723 return 0; 1724 } 1725 early_param("acpi_sci", setup_acpi_sci); 1726 1727 int __acpi_acquire_global_lock(unsigned int *lock) 1728 { 1729 unsigned int old, new, val; 1730 do { 1731 old = *lock; 1732 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1733 val = cmpxchg(lock, old, new); 1734 } while (unlikely (val != old)); 1735 return ((new & 0x3) < 3) ? -1 : 0; 1736 } 1737 1738 int __acpi_release_global_lock(unsigned int *lock) 1739 { 1740 unsigned int old, new, val; 1741 do { 1742 old = *lock; 1743 new = old & ~0x3; 1744 val = cmpxchg(lock, old, new); 1745 } while (unlikely (val != old)); 1746 return old & 0x1; 1747 } 1748 1749 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1750 { 1751 e820__range_add(addr, size, E820_TYPE_ACPI); 1752 e820__update_table_print(); 1753 } 1754 1755 void x86_default_set_root_pointer(u64 addr) 1756 { 1757 boot_params.acpi_rsdp_addr = addr; 1758 } 1759 1760 u64 x86_default_get_root_pointer(void) 1761 { 1762 return boot_params.acpi_rsdp_addr; 1763 } 1764