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