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