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_or_panic(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 915 SMP_CACHE_BYTES); 916 917 hpet_res->name = (void *)&hpet_res[1]; 918 hpet_res->flags = IORESOURCE_MEM; 919 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 920 hpet_tbl->sequence); 921 922 hpet_res->start = hpet_address; 923 hpet_res->end = hpet_address + (1 * 1024) - 1; 924 925 return 0; 926 } 927 928 /* 929 * hpet_insert_resource inserts the HPET resources used into the resource 930 * tree. 931 */ 932 static __init int hpet_insert_resource(void) 933 { 934 if (!hpet_res) 935 return 1; 936 937 return insert_resource(&iomem_resource, hpet_res); 938 } 939 940 late_initcall(hpet_insert_resource); 941 942 #else 943 #define acpi_parse_hpet NULL 944 #endif 945 946 static int __init acpi_parse_fadt(struct acpi_table_header *table) 947 { 948 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 949 pr_debug("no legacy devices present\n"); 950 x86_platform.legacy.devices.pnpbios = 0; 951 } 952 953 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 954 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 955 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 956 pr_debug("i8042 controller is absent\n"); 957 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 958 } 959 960 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 961 pr_debug("not registering RTC platform device\n"); 962 x86_platform.legacy.rtc = 0; 963 } 964 965 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 966 pr_debug("probing for VGA not safe\n"); 967 x86_platform.legacy.no_vga = 1; 968 } 969 970 #ifdef CONFIG_X86_PM_TIMER 971 /* detect the location of the ACPI PM Timer */ 972 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 973 /* FADT rev. 2 */ 974 if (acpi_gbl_FADT.xpm_timer_block.space_id != 975 ACPI_ADR_SPACE_SYSTEM_IO) 976 return 0; 977 978 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 979 /* 980 * "X" fields are optional extensions to the original V1.0 981 * fields, so we must selectively expand V1.0 fields if the 982 * corresponding X field is zero. 983 */ 984 if (!pmtmr_ioport) 985 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 986 } else { 987 /* FADT rev. 1 */ 988 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 989 } 990 if (pmtmr_ioport) 991 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 992 #endif 993 return 0; 994 } 995 996 #ifdef CONFIG_X86_LOCAL_APIC 997 /* 998 * Parse LAPIC entries in MADT 999 * returns 0 on success, < 0 on error 1000 */ 1001 1002 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1003 { 1004 int count; 1005 1006 if (!boot_cpu_has(X86_FEATURE_APIC)) 1007 return -ENODEV; 1008 1009 /* 1010 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1011 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1012 */ 1013 1014 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1015 acpi_parse_lapic_addr_ovr, 0); 1016 if (count < 0) { 1017 pr_err("Error parsing LAPIC address override entry\n"); 1018 return count; 1019 } 1020 1021 register_lapic_address(acpi_lapic_addr); 1022 1023 return count; 1024 } 1025 1026 static int __init acpi_parse_madt_lapic_entries(void) 1027 { 1028 int count, x2count = 0; 1029 1030 if (!boot_cpu_has(X86_FEATURE_APIC)) 1031 return -ENODEV; 1032 1033 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1034 acpi_parse_sapic, MAX_LOCAL_APIC); 1035 1036 if (!count) { 1037 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 1038 acpi_parse_lapic, MAX_LOCAL_APIC); 1039 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 1040 acpi_parse_x2apic, MAX_LOCAL_APIC); 1041 } 1042 if (!count && !x2count) { 1043 pr_err("No LAPIC entries present\n"); 1044 /* TBD: Cleanup to allow fallback to MPS */ 1045 return -ENODEV; 1046 } else if (count < 0 || x2count < 0) { 1047 pr_err("Error parsing LAPIC entry\n"); 1048 /* TBD: Cleanup to allow fallback to MPS */ 1049 return count; 1050 } 1051 1052 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1053 acpi_parse_x2apic_nmi, 0); 1054 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1055 acpi_parse_lapic_nmi, 0); 1056 if (count < 0 || x2count < 0) { 1057 pr_err("Error parsing LAPIC NMI entry\n"); 1058 /* TBD: Cleanup to allow fallback to MPS */ 1059 return count; 1060 } 1061 return 0; 1062 } 1063 #endif /* CONFIG_X86_LOCAL_APIC */ 1064 1065 #ifdef CONFIG_X86_IO_APIC 1066 static void __init mp_config_acpi_legacy_irqs(void) 1067 { 1068 int i; 1069 struct mpc_intsrc mp_irq; 1070 1071 #ifdef CONFIG_EISA 1072 /* 1073 * Fabricate the legacy ISA bus (bus #31). 1074 */ 1075 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1076 #endif 1077 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1078 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1079 1080 /* 1081 * Use the default configuration for the IRQs 0-15. Unless 1082 * overridden by (MADT) interrupt source override entries. 1083 */ 1084 for (i = 0; i < nr_legacy_irqs(); i++) { 1085 int ioapic, pin; 1086 unsigned int dstapic; 1087 int idx; 1088 u32 gsi; 1089 1090 /* Locate the gsi that irq i maps to. */ 1091 if (acpi_isa_irq_to_gsi(i, &gsi)) 1092 continue; 1093 1094 /* 1095 * Locate the IOAPIC that manages the ISA IRQ. 1096 */ 1097 ioapic = mp_find_ioapic(gsi); 1098 if (ioapic < 0) 1099 continue; 1100 pin = mp_find_ioapic_pin(ioapic, gsi); 1101 dstapic = mpc_ioapic_id(ioapic); 1102 1103 for (idx = 0; idx < mp_irq_entries; idx++) { 1104 struct mpc_intsrc *irq = mp_irqs + idx; 1105 1106 /* Do we already have a mapping for this ISA IRQ? */ 1107 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1108 break; 1109 1110 /* Do we already have a mapping for this IOAPIC pin */ 1111 if (irq->dstapic == dstapic && irq->dstirq == pin) 1112 break; 1113 } 1114 1115 if (idx != mp_irq_entries) { 1116 pr_debug("ACPI: IRQ%d used by override.\n", i); 1117 continue; /* IRQ already used */ 1118 } 1119 1120 mp_irq.type = MP_INTSRC; 1121 mp_irq.irqflag = 0; /* Conforming */ 1122 mp_irq.srcbus = MP_ISA_BUS; 1123 mp_irq.dstapic = dstapic; 1124 mp_irq.irqtype = mp_INT; 1125 mp_irq.srcbusirq = i; /* Identity mapped */ 1126 mp_irq.dstirq = pin; 1127 1128 mp_save_irq(&mp_irq); 1129 } 1130 } 1131 1132 /* 1133 * Parse IOAPIC related entries in MADT 1134 * returns 0 on success, < 0 on error 1135 */ 1136 static int __init acpi_parse_madt_ioapic_entries(void) 1137 { 1138 int count; 1139 1140 /* 1141 * ACPI interpreter is required to complete interrupt setup, 1142 * so if it is off, don't enumerate the io-apics with ACPI. 1143 * If MPS is present, it will handle them, 1144 * otherwise the system will stay in PIC mode 1145 */ 1146 if (acpi_disabled || acpi_noirq) 1147 return -ENODEV; 1148 1149 if (!boot_cpu_has(X86_FEATURE_APIC)) 1150 return -ENODEV; 1151 1152 /* 1153 * if "noapic" boot option, don't look for IO-APICs 1154 */ 1155 if (ioapic_is_disabled) { 1156 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1157 return -ENODEV; 1158 } 1159 1160 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1161 MAX_IO_APICS); 1162 if (!count) { 1163 pr_err("No IOAPIC entries present\n"); 1164 return -ENODEV; 1165 } else if (count < 0) { 1166 pr_err("Error parsing IOAPIC entry\n"); 1167 return count; 1168 } 1169 1170 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1171 acpi_parse_int_src_ovr, 1172 irq_get_nr_irqs()); 1173 if (count < 0) { 1174 pr_err("Error parsing interrupt source overrides entry\n"); 1175 /* TBD: Cleanup to allow fallback to MPS */ 1176 return count; 1177 } 1178 1179 /* 1180 * If BIOS did not supply an INT_SRC_OVR for the SCI 1181 * pretend we got one so we can set the SCI flags. 1182 * But ignore setting up SCI on hardware reduced platforms. 1183 */ 1184 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1185 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1186 acpi_gbl_FADT.sci_interrupt); 1187 1188 /* Fill in identity legacy mappings where no override */ 1189 mp_config_acpi_legacy_irqs(); 1190 1191 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1192 acpi_parse_nmi_src, 1193 irq_get_nr_irqs()); 1194 if (count < 0) { 1195 pr_err("Error parsing NMI SRC entry\n"); 1196 /* TBD: Cleanup to allow fallback to MPS */ 1197 return count; 1198 } 1199 1200 return 0; 1201 } 1202 #else 1203 static inline int acpi_parse_madt_ioapic_entries(void) 1204 { 1205 return -1; 1206 } 1207 #endif /* !CONFIG_X86_IO_APIC */ 1208 1209 static void __init early_acpi_process_madt(void) 1210 { 1211 #ifdef CONFIG_X86_LOCAL_APIC 1212 int error; 1213 1214 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1215 1216 /* 1217 * Parse MADT LAPIC entries 1218 */ 1219 error = early_acpi_parse_madt_lapic_addr_ovr(); 1220 if (!error) { 1221 acpi_lapic = 1; 1222 smp_found_config = 1; 1223 } 1224 if (error == -EINVAL) { 1225 /* 1226 * Dell Precision Workstation 410, 610 come here. 1227 */ 1228 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1229 disable_acpi(); 1230 } 1231 } 1232 #endif 1233 } 1234 1235 static void __init acpi_process_madt(void) 1236 { 1237 #ifdef CONFIG_X86_LOCAL_APIC 1238 int error; 1239 1240 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1241 1242 /* 1243 * Parse MADT LAPIC entries 1244 */ 1245 error = acpi_parse_madt_lapic_entries(); 1246 if (!error) { 1247 acpi_lapic = 1; 1248 1249 /* 1250 * Parse MADT IO-APIC entries 1251 */ 1252 mutex_lock(&acpi_ioapic_lock); 1253 error = acpi_parse_madt_ioapic_entries(); 1254 mutex_unlock(&acpi_ioapic_lock); 1255 if (!error) { 1256 acpi_set_irq_model_ioapic(); 1257 1258 smp_found_config = 1; 1259 } 1260 1261 #ifdef CONFIG_ACPI_MADT_WAKEUP 1262 /* 1263 * Parse MADT MP Wake entry. 1264 */ 1265 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1266 acpi_parse_mp_wake, 1); 1267 #endif 1268 } 1269 if (error == -EINVAL) { 1270 /* 1271 * Dell Precision Workstation 410, 610 come here. 1272 */ 1273 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1274 disable_acpi(); 1275 } 1276 } else { 1277 /* 1278 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1279 * In the event an MPS table was found, forget it. 1280 * Boot with "acpi=off" to use MPS on such a system. 1281 */ 1282 if (smp_found_config) { 1283 pr_warn("No APIC-table, disabling MPS\n"); 1284 smp_found_config = 0; 1285 } 1286 } 1287 1288 /* 1289 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1290 * processors, where MPS only supports physical. 1291 */ 1292 if (acpi_lapic && acpi_ioapic) 1293 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1294 else if (acpi_lapic) 1295 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1296 #endif 1297 return; 1298 } 1299 1300 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1301 { 1302 if (!acpi_force) { 1303 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1304 acpi_noirq_set(); 1305 } 1306 return 0; 1307 } 1308 1309 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1310 { 1311 if (!acpi_force) { 1312 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1313 acpi_disable_pci(); 1314 } 1315 return 0; 1316 } 1317 1318 static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1319 { 1320 if (!acpi_force) { 1321 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1322 acpi_gbl_do_not_use_xsdt = TRUE; 1323 } else { 1324 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1325 } 1326 return 0; 1327 } 1328 1329 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1330 { 1331 if (!acpi_force) { 1332 pr_notice("%s detected: acpi off\n", d->ident); 1333 disable_acpi(); 1334 } else { 1335 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1336 } 1337 return 0; 1338 } 1339 1340 /* 1341 * Force ignoring BIOS IRQ0 override 1342 */ 1343 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1344 { 1345 if (!acpi_skip_timer_override) { 1346 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1347 d->ident); 1348 acpi_skip_timer_override = 1; 1349 } 1350 return 0; 1351 } 1352 1353 /* 1354 * ACPI offers an alternative platform interface model that removes 1355 * ACPI hardware requirements for platforms that do not implement 1356 * the PC Architecture. 1357 * 1358 * We initialize the Hardware-reduced ACPI model here: 1359 */ 1360 void __init acpi_generic_reduced_hw_init(void) 1361 { 1362 /* 1363 * Override x86_init functions and bypass legacy PIC in 1364 * hardware reduced ACPI mode. 1365 */ 1366 x86_init.timers.timer_init = x86_init_noop; 1367 x86_init.irqs.pre_vector_init = x86_init_noop; 1368 legacy_pic = &null_legacy_pic; 1369 } 1370 1371 static void __init acpi_reduced_hw_init(void) 1372 { 1373 if (acpi_gbl_reduced_hardware) 1374 x86_init.acpi.reduced_hw_early_init(); 1375 } 1376 1377 /* 1378 * If your system is blacklisted here, but you find that acpi=force 1379 * works for you, please contact linux-acpi@vger.kernel.org 1380 */ 1381 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1382 /* 1383 * Boxes that need ACPI disabled 1384 */ 1385 { 1386 .callback = dmi_disable_acpi, 1387 .ident = "IBM Thinkpad", 1388 .matches = { 1389 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1390 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1391 }, 1392 }, 1393 1394 /* 1395 * Boxes that need ACPI PCI IRQ routing disabled 1396 */ 1397 { 1398 .callback = disable_acpi_irq, 1399 .ident = "ASUS A7V", 1400 .matches = { 1401 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1402 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1403 /* newer BIOS, Revision 1011, does work */ 1404 DMI_MATCH(DMI_BIOS_VERSION, 1405 "ASUS A7V ACPI BIOS Revision 1007"), 1406 }, 1407 }, 1408 { 1409 /* 1410 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1411 * for LPC bridge, which is needed for the PCI 1412 * interrupt links to work. DSDT fix is in bug 5966. 1413 * 2645, 2646 model numbers are shared with 600/600E/600X 1414 */ 1415 .callback = disable_acpi_irq, 1416 .ident = "IBM Thinkpad 600 Series 2645", 1417 .matches = { 1418 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1419 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1420 }, 1421 }, 1422 { 1423 .callback = disable_acpi_irq, 1424 .ident = "IBM Thinkpad 600 Series 2646", 1425 .matches = { 1426 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1427 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1428 }, 1429 }, 1430 /* 1431 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1432 */ 1433 { /* _BBN 0 bug */ 1434 .callback = disable_acpi_pci, 1435 .ident = "ASUS PR-DLS", 1436 .matches = { 1437 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1438 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1439 DMI_MATCH(DMI_BIOS_VERSION, 1440 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1441 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1442 }, 1443 }, 1444 { 1445 .callback = disable_acpi_pci, 1446 .ident = "Acer TravelMate 36x Laptop", 1447 .matches = { 1448 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1449 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1450 }, 1451 }, 1452 /* 1453 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1454 */ 1455 { 1456 .callback = disable_acpi_xsdt, 1457 .ident = "Advantech DAC-BJ01", 1458 .matches = { 1459 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1460 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1461 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1462 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1463 }, 1464 }, 1465 {} 1466 }; 1467 1468 /* second table for DMI checks that should run after early-quirks */ 1469 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1470 /* 1471 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1472 * which includes some code which overrides all temperature 1473 * trip points to 16C if the INTIN2 input of the I/O APIC 1474 * is enabled. This input is incorrectly designated the 1475 * ISA IRQ 0 via an interrupt source override even though 1476 * it is wired to the output of the master 8259A and INTIN0 1477 * is not connected at all. Force ignoring BIOS IRQ0 1478 * override in that cases. 1479 */ 1480 { 1481 .callback = dmi_ignore_irq0_timer_override, 1482 .ident = "HP nx6115 laptop", 1483 .matches = { 1484 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1485 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1486 }, 1487 }, 1488 { 1489 .callback = dmi_ignore_irq0_timer_override, 1490 .ident = "HP NX6125 laptop", 1491 .matches = { 1492 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1493 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1494 }, 1495 }, 1496 { 1497 .callback = dmi_ignore_irq0_timer_override, 1498 .ident = "HP NX6325 laptop", 1499 .matches = { 1500 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1501 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1502 }, 1503 }, 1504 { 1505 .callback = dmi_ignore_irq0_timer_override, 1506 .ident = "HP 6715b laptop", 1507 .matches = { 1508 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1509 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1510 }, 1511 }, 1512 { 1513 .callback = dmi_ignore_irq0_timer_override, 1514 .ident = "FUJITSU SIEMENS", 1515 .matches = { 1516 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1517 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1518 }, 1519 }, 1520 {} 1521 }; 1522 1523 /* 1524 * acpi_boot_table_init() and acpi_boot_init() 1525 * called from setup_arch(), always. 1526 * 1. checksums all tables 1527 * 2. enumerates lapics 1528 * 3. enumerates io-apics 1529 * 1530 * acpi_table_init() is separate to allow reading SRAT without 1531 * other side effects. 1532 * 1533 * side effects of acpi_boot_init: 1534 * acpi_lapic = 1 if LAPIC found 1535 * acpi_ioapic = 1 if IOAPIC found 1536 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1537 * if acpi_blacklisted() acpi_disabled = 1; 1538 * acpi_irq_model=... 1539 * ... 1540 */ 1541 1542 void __init acpi_boot_table_init(void) 1543 { 1544 dmi_check_system(acpi_dmi_table); 1545 1546 /* 1547 * If acpi_disabled, bail out 1548 */ 1549 if (acpi_disabled) 1550 return; 1551 1552 /* 1553 * Initialize the ACPI boot-time table parser. 1554 */ 1555 if (acpi_locate_initial_tables()) 1556 disable_acpi(); 1557 else 1558 acpi_reserve_initial_tables(); 1559 } 1560 1561 int __init early_acpi_boot_init(void) 1562 { 1563 if (acpi_disabled) 1564 return 1; 1565 1566 acpi_table_init_complete(); 1567 1568 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1569 1570 /* 1571 * blacklist may disable ACPI entirely 1572 */ 1573 if (acpi_blacklisted()) { 1574 if (acpi_force) { 1575 pr_warn("acpi=force override\n"); 1576 } else { 1577 pr_warn("Disabling ACPI support\n"); 1578 disable_acpi(); 1579 return 1; 1580 } 1581 } 1582 1583 /* 1584 * Process the Multiple APIC Description Table (MADT), if present 1585 */ 1586 early_acpi_process_madt(); 1587 1588 /* 1589 * Hardware-reduced ACPI mode initialization: 1590 */ 1591 acpi_reduced_hw_init(); 1592 1593 return 0; 1594 } 1595 1596 int __init acpi_boot_init(void) 1597 { 1598 /* those are executed after early-quirks are executed */ 1599 dmi_check_system(acpi_dmi_table_late); 1600 1601 /* 1602 * If acpi_disabled, bail out 1603 */ 1604 if (acpi_disabled) 1605 return 1; 1606 1607 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1608 1609 /* 1610 * set sci_int and PM timer address 1611 */ 1612 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1613 1614 /* 1615 * Process the Multiple APIC Description Table (MADT), if present 1616 */ 1617 acpi_process_madt(); 1618 1619 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1620 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1621 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1622 1623 if (!acpi_noirq) 1624 x86_init.pci.init = pci_acpi_init; 1625 1626 /* Do not enable ACPI SPCR console by default */ 1627 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1628 return 0; 1629 } 1630 1631 static int __init parse_acpi(char *arg) 1632 { 1633 if (!arg) 1634 return -EINVAL; 1635 1636 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1637 if (strcmp(arg, "off") == 0) { 1638 disable_acpi(); 1639 } 1640 /* acpi=force to over-ride black-list */ 1641 else if (strcmp(arg, "force") == 0) { 1642 acpi_force = 1; 1643 acpi_disabled = 0; 1644 } 1645 /* acpi=strict disables out-of-spec workarounds */ 1646 else if (strcmp(arg, "strict") == 0) { 1647 acpi_strict = 1; 1648 } 1649 /* acpi=rsdt use RSDT instead of XSDT */ 1650 else if (strcmp(arg, "rsdt") == 0) { 1651 acpi_gbl_do_not_use_xsdt = TRUE; 1652 } 1653 /* "acpi=noirq" disables ACPI interrupt routing */ 1654 else if (strcmp(arg, "noirq") == 0) { 1655 acpi_noirq_set(); 1656 } 1657 /* "acpi=copy_dsdt" copies DSDT */ 1658 else if (strcmp(arg, "copy_dsdt") == 0) { 1659 acpi_gbl_copy_dsdt_locally = 1; 1660 } 1661 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1662 else if (strcmp(arg, "nocmcff") == 0) { 1663 acpi_disable_cmcff = 1; 1664 } else { 1665 /* Core will printk when we return error. */ 1666 return -EINVAL; 1667 } 1668 return 0; 1669 } 1670 early_param("acpi", parse_acpi); 1671 1672 static int __init parse_acpi_bgrt(char *arg) 1673 { 1674 acpi_nobgrt = true; 1675 return 0; 1676 } 1677 early_param("bgrt_disable", parse_acpi_bgrt); 1678 1679 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1680 static int __init parse_pci(char *arg) 1681 { 1682 if (arg && strcmp(arg, "noacpi") == 0) 1683 acpi_disable_pci(); 1684 return 0; 1685 } 1686 early_param("pci", parse_pci); 1687 1688 int __init acpi_mps_check(void) 1689 { 1690 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1691 /* mptable code is not built-in*/ 1692 if (acpi_disabled || acpi_noirq) { 1693 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1694 return 1; 1695 } 1696 #endif 1697 return 0; 1698 } 1699 1700 #ifdef CONFIG_X86_IO_APIC 1701 static int __init parse_acpi_skip_timer_override(char *arg) 1702 { 1703 acpi_skip_timer_override = 1; 1704 return 0; 1705 } 1706 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1707 1708 static int __init parse_acpi_use_timer_override(char *arg) 1709 { 1710 acpi_use_timer_override = 1; 1711 return 0; 1712 } 1713 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1714 #endif /* CONFIG_X86_IO_APIC */ 1715 1716 static int __init setup_acpi_sci(char *s) 1717 { 1718 if (!s) 1719 return -EINVAL; 1720 if (!strcmp(s, "edge")) 1721 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1722 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1723 else if (!strcmp(s, "level")) 1724 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1725 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1726 else if (!strcmp(s, "high")) 1727 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1728 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1729 else if (!strcmp(s, "low")) 1730 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1731 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1732 else 1733 return -EINVAL; 1734 return 0; 1735 } 1736 early_param("acpi_sci", setup_acpi_sci); 1737 1738 int __acpi_acquire_global_lock(unsigned int *lock) 1739 { 1740 unsigned int old, new, val; 1741 1742 old = READ_ONCE(*lock); 1743 do { 1744 val = (old >> 1) & 0x1; 1745 new = (old & ~0x3) + 2 + val; 1746 } while (!try_cmpxchg(lock, &old, new)); 1747 1748 if (val) 1749 return 0; 1750 1751 return -1; 1752 } 1753 1754 int __acpi_release_global_lock(unsigned int *lock) 1755 { 1756 unsigned int old, new; 1757 1758 old = READ_ONCE(*lock); 1759 do { 1760 new = old & ~0x3; 1761 } while (!try_cmpxchg(lock, &old, new)); 1762 return old & 0x1; 1763 } 1764 1765 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1766 { 1767 e820__range_add(addr, size, E820_TYPE_NVS); 1768 e820__update_table_print(); 1769 } 1770 1771 void x86_default_set_root_pointer(u64 addr) 1772 { 1773 boot_params.acpi_rsdp_addr = addr; 1774 } 1775 1776 u64 x86_default_get_root_pointer(void) 1777 { 1778 return boot_params.acpi_rsdp_addr; 1779 } 1780 1781 #ifdef CONFIG_XEN_PV 1782 void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size) 1783 { 1784 return ioremap_cache(phys, size); 1785 } 1786 1787 void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, acpi_size size) = 1788 x86_acpi_os_ioremap; 1789 EXPORT_SYMBOL_GPL(acpi_os_ioremap); 1790 #endif 1791