1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 4 * 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 7 */ 8 #define pr_fmt(fmt) "ACPI: " fmt 9 10 #include <linux/init.h> 11 #include <linux/acpi.h> 12 #include <linux/acpi_pmtmr.h> 13 #include <linux/efi.h> 14 #include <linux/cpumask.h> 15 #include <linux/export.h> 16 #include <linux/dmi.h> 17 #include <linux/irq.h> 18 #include <linux/slab.h> 19 #include <linux/memblock.h> 20 #include <linux/ioport.h> 21 #include <linux/pci.h> 22 #include <linux/efi-bgrt.h> 23 #include <linux/serial_core.h> 24 #include <linux/pgtable.h> 25 26 #include <xen/xen.h> 27 28 #include <asm/e820/api.h> 29 #include <asm/irqdomain.h> 30 #include <asm/pci_x86.h> 31 #include <asm/io_apic.h> 32 #include <asm/apic.h> 33 #include <asm/io.h> 34 #include <asm/mpspec.h> 35 #include <asm/smp.h> 36 #include <asm/i8259.h> 37 #include <asm/setup.h> 38 #include <asm/hypervisor.h> 39 40 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 41 static int __initdata acpi_force = 0; 42 int acpi_disabled; 43 EXPORT_SYMBOL(acpi_disabled); 44 45 #ifdef CONFIG_X86_64 46 # include <asm/proto.h> 47 #endif /* X86 */ 48 49 int acpi_noirq; /* skip ACPI IRQ initialization */ 50 static int acpi_nobgrt; /* skip ACPI BGRT */ 51 static int acpi_spcr_add __initdata; /* add SPCR-provided console */ 52 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 53 EXPORT_SYMBOL(acpi_pci_disabled); 54 55 int acpi_lapic; 56 int acpi_ioapic; 57 int acpi_strict; 58 int acpi_disable_cmcff; 59 bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 60 61 /* ACPI SCI override configuration */ 62 u8 acpi_sci_flags __initdata; 63 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 64 int acpi_skip_timer_override __initdata; 65 int acpi_use_timer_override __initdata; 66 int acpi_fix_pin2_polarity __initdata; 67 68 #ifdef CONFIG_X86_LOCAL_APIC 69 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 70 static bool has_lapic_cpus __initdata; 71 static bool acpi_support_online_capable; 72 #endif 73 74 #ifdef CONFIG_X86_IO_APIC 75 /* 76 * Locks related to IOAPIC hotplug 77 * Hotplug side: 78 * ->device_hotplug_lock 79 * ->acpi_ioapic_lock 80 * ->ioapic_lock 81 * Interrupt mapping side: 82 * ->acpi_ioapic_lock 83 * ->ioapic_mutex 84 * ->ioapic_lock 85 */ 86 static DEFINE_MUTEX(acpi_ioapic_lock); 87 #endif 88 89 /* -------------------------------------------------------------------------- 90 Boot-time Configuration 91 -------------------------------------------------------------------------- */ 92 93 /* 94 * The default interrupt routing model is PIC (8259). This gets 95 * overridden if IOAPICs are enumerated (below). 96 */ 97 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 98 99 100 /* 101 * ISA irqs by default are the first 16 gsis but can be 102 * any gsi as specified by an interrupt source override. 103 */ 104 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 105 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 106 }; 107 108 /* 109 * This is just a simple wrapper around early_memremap(), 110 * with sanity checks for phys == 0 and size == 0. 111 */ 112 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 113 { 114 115 if (!phys || !size) 116 return NULL; 117 118 return early_memremap(phys, size); 119 } 120 121 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 122 { 123 if (!map || !size) 124 return; 125 126 early_memunmap(map, size); 127 } 128 129 #ifdef CONFIG_X86_LOCAL_APIC 130 static int __init acpi_parse_madt(struct acpi_table_header *table) 131 { 132 struct acpi_table_madt *madt = NULL; 133 134 if (!boot_cpu_has(X86_FEATURE_APIC)) 135 return -EINVAL; 136 137 madt = (struct acpi_table_madt *)table; 138 if (!madt) { 139 pr_warn("Unable to map MADT\n"); 140 return -ENODEV; 141 } 142 143 if (madt->address) { 144 acpi_lapic_addr = (u64) madt->address; 145 146 pr_debug("Local APIC address 0x%08x\n", madt->address); 147 } 148 149 if (madt->flags & ACPI_MADT_PCAT_COMPAT) 150 legacy_pic_pcat_compat(); 151 152 /* ACPI 6.3 and newer support the online capable bit. */ 153 if (acpi_gbl_FADT.header.revision > 6 || 154 (acpi_gbl_FADT.header.revision == 6 && 155 acpi_gbl_FADT.minor_revision >= 3)) 156 acpi_support_online_capable = true; 157 158 default_acpi_madt_oem_check(madt->header.oem_id, 159 madt->header.oem_table_id); 160 161 return 0; 162 } 163 164 static bool __init acpi_is_processor_usable(u32 lapic_flags) 165 { 166 if (lapic_flags & ACPI_MADT_ENABLED) 167 return true; 168 169 if (acpi_support_online_capable) 170 return lapic_flags & ACPI_MADT_ONLINE_CAPABLE; 171 172 /* 173 * QEMU expects legacy "Enabled=0" LAPIC entries to be counted as usable 174 * in order to support CPU hotplug in guests. 175 */ 176 return !hypervisor_is_type(X86_HYPER_NATIVE); 177 } 178 179 static int __init 180 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 181 { 182 struct acpi_madt_local_x2apic *processor = NULL; 183 #ifdef CONFIG_X86_X2APIC 184 u32 apic_id; 185 u8 enabled; 186 #endif 187 188 processor = (struct acpi_madt_local_x2apic *)header; 189 190 if (BAD_MADT_ENTRY(processor, end)) 191 return -EINVAL; 192 193 acpi_table_print_madt_entry(&header->common); 194 195 #ifdef CONFIG_X86_X2APIC 196 apic_id = processor->local_apic_id; 197 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 198 199 /* Ignore invalid ID */ 200 if (apic_id == 0xffffffff) 201 return 0; 202 203 /* don't register processors that cannot be onlined */ 204 if (!acpi_is_processor_usable(processor->lapic_flags)) 205 return 0; 206 207 /* 208 * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure 209 * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID 210 * in x2APIC must be equal or greater than 0xff. 211 */ 212 if (has_lapic_cpus && apic_id < 0xff) 213 return 0; 214 215 /* 216 * We need to register disabled CPU as well to permit 217 * counting disabled CPUs. This allows us to size 218 * cpus_possible_map more accurately, to permit 219 * to not preallocating memory for all NR_CPUS 220 * when we use CPU hotplug. 221 */ 222 if (!apic_id_valid(apic_id)) { 223 if (enabled) 224 pr_warn("x2apic entry ignored\n"); 225 return 0; 226 } 227 228 topology_register_apic(apic_id, processor->uid, enabled); 229 #else 230 pr_warn("x2apic entry ignored\n"); 231 #endif 232 233 return 0; 234 } 235 236 static int __init 237 acpi_check_lapic(union acpi_subtable_headers *header, const unsigned long end) 238 { 239 struct acpi_madt_local_apic *processor = NULL; 240 241 processor = (struct acpi_madt_local_apic *)header; 242 243 if (BAD_MADT_ENTRY(processor, end)) 244 return -EINVAL; 245 246 /* Ignore invalid ID */ 247 if (processor->id == 0xff) 248 return 0; 249 250 /* Ignore processors that can not be onlined */ 251 if (!acpi_is_processor_usable(processor->lapic_flags)) 252 return 0; 253 254 has_lapic_cpus = true; 255 return 0; 256 } 257 258 static int __init 259 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 260 { 261 struct acpi_madt_local_apic *processor = NULL; 262 263 processor = (struct acpi_madt_local_apic *)header; 264 265 if (BAD_MADT_ENTRY(processor, end)) 266 return -EINVAL; 267 268 acpi_table_print_madt_entry(&header->common); 269 270 /* Ignore invalid ID */ 271 if (processor->id == 0xff) 272 return 0; 273 274 /* don't register processors that can not be onlined */ 275 if (!acpi_is_processor_usable(processor->lapic_flags)) 276 return 0; 277 278 /* 279 * We need to register disabled CPU as well to permit 280 * counting disabled CPUs. This allows us to size 281 * cpus_possible_map more accurately, to permit 282 * to not preallocating memory for all NR_CPUS 283 * when we use CPU hotplug. 284 */ 285 topology_register_apic(processor->id, /* APIC ID */ 286 processor->processor_id, /* ACPI ID */ 287 processor->lapic_flags & ACPI_MADT_ENABLED); 288 289 return 0; 290 } 291 292 static int __init 293 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 294 { 295 struct acpi_madt_local_sapic *processor = NULL; 296 297 processor = (struct acpi_madt_local_sapic *)header; 298 299 if (BAD_MADT_ENTRY(processor, end)) 300 return -EINVAL; 301 302 acpi_table_print_madt_entry(&header->common); 303 304 topology_register_apic((processor->id << 8) | processor->eid,/* APIC ID */ 305 processor->processor_id, /* ACPI ID */ 306 processor->lapic_flags & ACPI_MADT_ENABLED); 307 308 return 0; 309 } 310 311 static int __init 312 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 313 const unsigned long end) 314 { 315 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 316 317 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 318 319 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 320 return -EINVAL; 321 322 acpi_table_print_madt_entry(&header->common); 323 324 acpi_lapic_addr = lapic_addr_ovr->address; 325 326 return 0; 327 } 328 329 static int __init 330 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 331 const unsigned long end) 332 { 333 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 334 335 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 336 337 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 338 return -EINVAL; 339 340 acpi_table_print_madt_entry(&header->common); 341 342 if (x2apic_nmi->lint != 1) 343 pr_warn("NMI not connected to LINT 1!\n"); 344 345 return 0; 346 } 347 348 static int __init 349 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 350 { 351 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 352 353 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 354 355 if (BAD_MADT_ENTRY(lapic_nmi, end)) 356 return -EINVAL; 357 358 acpi_table_print_madt_entry(&header->common); 359 360 if (lapic_nmi->lint != 1) 361 pr_warn("NMI not connected to LINT 1!\n"); 362 363 return 0; 364 } 365 #endif /* CONFIG_X86_LOCAL_APIC */ 366 367 #ifdef CONFIG_X86_IO_APIC 368 #define MP_ISA_BUS 0 369 370 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 371 u8 trigger, u32 gsi); 372 373 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 374 u32 gsi) 375 { 376 /* 377 * Check bus_irq boundary. 378 */ 379 if (bus_irq >= NR_IRQS_LEGACY) { 380 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 381 return; 382 } 383 384 /* 385 * TBD: This check is for faulty timer entries, where the override 386 * erroneously sets the trigger to level, resulting in a HUGE 387 * increase of timer interrupts! 388 */ 389 if ((bus_irq == 0) && (trigger == 3)) 390 trigger = 1; 391 392 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 393 return; 394 /* 395 * Reset default identity mapping if gsi is also an legacy IRQ, 396 * otherwise there will be more than one entry with the same GSI 397 * and acpi_isa_irq_to_gsi() may give wrong result. 398 */ 399 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 400 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 401 isa_irq_to_gsi[bus_irq] = gsi; 402 } 403 404 static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 405 int polarity) 406 { 407 #ifdef CONFIG_X86_MPPARSE 408 struct mpc_intsrc mp_irq; 409 struct pci_dev *pdev; 410 unsigned char number; 411 unsigned int devfn; 412 int ioapic; 413 u8 pin; 414 415 if (!acpi_ioapic) 416 return; 417 if (!dev || !dev_is_pci(dev)) 418 return; 419 420 pdev = to_pci_dev(dev); 421 number = pdev->bus->number; 422 devfn = pdev->devfn; 423 pin = pdev->pin; 424 /* print the entry should happen on mptable identically */ 425 mp_irq.type = MP_INTSRC; 426 mp_irq.irqtype = mp_INT; 427 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 428 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 429 mp_irq.srcbus = number; 430 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 431 ioapic = mp_find_ioapic(gsi); 432 mp_irq.dstapic = mpc_ioapic_id(ioapic); 433 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 434 435 mp_save_irq(&mp_irq); 436 #endif 437 } 438 439 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 440 u8 trigger, u32 gsi) 441 { 442 struct mpc_intsrc mp_irq; 443 int ioapic, pin; 444 445 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 446 ioapic = mp_find_ioapic(gsi); 447 if (ioapic < 0) { 448 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 449 return ioapic; 450 } 451 452 pin = mp_find_ioapic_pin(ioapic, gsi); 453 454 mp_irq.type = MP_INTSRC; 455 mp_irq.irqtype = mp_INT; 456 mp_irq.irqflag = (trigger << 2) | polarity; 457 mp_irq.srcbus = MP_ISA_BUS; 458 mp_irq.srcbusirq = bus_irq; 459 mp_irq.dstapic = mpc_ioapic_id(ioapic); 460 mp_irq.dstirq = pin; 461 462 mp_save_irq(&mp_irq); 463 464 return 0; 465 } 466 467 static int __init 468 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 469 { 470 struct acpi_madt_io_apic *ioapic = NULL; 471 struct ioapic_domain_cfg cfg = { 472 .type = IOAPIC_DOMAIN_DYNAMIC, 473 .ops = &mp_ioapic_irqdomain_ops, 474 }; 475 476 ioapic = (struct acpi_madt_io_apic *)header; 477 478 if (BAD_MADT_ENTRY(ioapic, end)) 479 return -EINVAL; 480 481 acpi_table_print_madt_entry(&header->common); 482 483 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 484 if (ioapic->global_irq_base < nr_legacy_irqs()) 485 cfg.type = IOAPIC_DOMAIN_LEGACY; 486 487 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 488 &cfg); 489 490 return 0; 491 } 492 493 /* 494 * Parse Interrupt Source Override for the ACPI SCI 495 */ 496 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 497 { 498 if (trigger == 0) /* compatible SCI trigger is level */ 499 trigger = 3; 500 501 if (polarity == 0) /* compatible SCI polarity is low */ 502 polarity = 3; 503 504 /* Command-line over-ride via acpi_sci= */ 505 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 506 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 507 508 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 509 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 510 511 if (bus_irq < NR_IRQS_LEGACY) 512 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 513 else 514 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 515 516 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 517 518 /* 519 * stash over-ride to indicate we've been here 520 * and for later update of acpi_gbl_FADT 521 */ 522 acpi_sci_override_gsi = gsi; 523 return; 524 } 525 526 static int __init 527 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 528 const unsigned long end) 529 { 530 struct acpi_madt_interrupt_override *intsrc = NULL; 531 532 intsrc = (struct acpi_madt_interrupt_override *)header; 533 534 if (BAD_MADT_ENTRY(intsrc, end)) 535 return -EINVAL; 536 537 acpi_table_print_madt_entry(&header->common); 538 539 if (intsrc->source_irq < NR_IRQS_LEGACY) 540 acpi_int_src_ovr[intsrc->source_irq] = true; 541 542 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 543 acpi_sci_ioapic_setup(intsrc->source_irq, 544 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 545 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 546 intsrc->global_irq); 547 return 0; 548 } 549 550 if (intsrc->source_irq == 0) { 551 if (acpi_skip_timer_override) { 552 pr_warn("BIOS IRQ0 override ignored.\n"); 553 return 0; 554 } 555 556 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 557 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 558 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 559 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 560 } 561 } 562 563 mp_override_legacy_irq(intsrc->source_irq, 564 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 565 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 566 intsrc->global_irq); 567 568 return 0; 569 } 570 571 static int __init 572 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 573 { 574 struct acpi_madt_nmi_source *nmi_src = NULL; 575 576 nmi_src = (struct acpi_madt_nmi_source *)header; 577 578 if (BAD_MADT_ENTRY(nmi_src, end)) 579 return -EINVAL; 580 581 acpi_table_print_madt_entry(&header->common); 582 583 /* TBD: Support nimsrc entries? */ 584 585 return 0; 586 } 587 588 #endif /* CONFIG_X86_IO_APIC */ 589 590 /* 591 * acpi_pic_sci_set_trigger() 592 * 593 * use ELCR to set PIC-mode trigger type for SCI 594 * 595 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 596 * it may require Edge Trigger -- use "acpi_sci=edge" 597 * 598 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 599 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 600 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 601 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 602 */ 603 604 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 605 { 606 unsigned int mask = 1 << irq; 607 unsigned int old, new; 608 609 /* Real old ELCR mask */ 610 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 611 612 /* 613 * If we use ACPI to set PCI IRQs, then we should clear ELCR 614 * since we will set it correctly as we enable the PCI irq 615 * routing. 616 */ 617 new = acpi_noirq ? old : 0; 618 619 /* 620 * Update SCI information in the ELCR, it isn't in the PCI 621 * routing tables.. 622 */ 623 switch (trigger) { 624 case 1: /* Edge - clear */ 625 new &= ~mask; 626 break; 627 case 3: /* Level - set */ 628 new |= mask; 629 break; 630 } 631 632 if (old == new) 633 return; 634 635 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 636 outb(new, PIC_ELCR1); 637 outb(new >> 8, PIC_ELCR2); 638 } 639 640 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 641 { 642 int rc, irq, trigger, polarity; 643 644 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 645 *irqp = gsi; 646 return 0; 647 } 648 649 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 650 if (rc) 651 return rc; 652 653 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 654 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 655 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 656 if (irq < 0) 657 return irq; 658 659 *irqp = irq; 660 return 0; 661 } 662 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 663 664 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 665 { 666 if (isa_irq < nr_legacy_irqs() && 667 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 668 *gsi = isa_irq_to_gsi[isa_irq]; 669 return 0; 670 } 671 672 return -1; 673 } 674 675 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 676 int trigger, int polarity) 677 { 678 #ifdef CONFIG_PCI 679 /* 680 * Make sure all (legacy) PCI IRQs are set as level-triggered. 681 */ 682 if (trigger == ACPI_LEVEL_SENSITIVE) 683 elcr_set_level_irq(gsi); 684 #endif 685 686 return gsi; 687 } 688 689 #ifdef CONFIG_X86_LOCAL_APIC 690 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 691 int trigger, int polarity) 692 { 693 int irq = gsi; 694 #ifdef CONFIG_X86_IO_APIC 695 int node; 696 struct irq_alloc_info info; 697 698 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 699 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 700 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 701 ioapic_set_alloc_attr(&info, node, trigger, polarity); 702 703 mutex_lock(&acpi_ioapic_lock); 704 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 705 /* Don't set up the ACPI SCI because it's already set up */ 706 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 707 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 708 mutex_unlock(&acpi_ioapic_lock); 709 #endif 710 711 return irq; 712 } 713 714 static void acpi_unregister_gsi_ioapic(u32 gsi) 715 { 716 #ifdef CONFIG_X86_IO_APIC 717 int irq; 718 719 mutex_lock(&acpi_ioapic_lock); 720 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 721 if (irq > 0) 722 mp_unmap_irq(irq); 723 mutex_unlock(&acpi_ioapic_lock); 724 #endif 725 } 726 #endif 727 728 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 729 int trigger, int polarity) = acpi_register_gsi_pic; 730 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 731 732 #ifdef CONFIG_ACPI_SLEEP 733 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 734 #else 735 int (*acpi_suspend_lowlevel)(void); 736 #endif 737 738 /* 739 * success: return IRQ number (>=0) 740 * failure: return < 0 741 */ 742 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 743 { 744 return __acpi_register_gsi(dev, gsi, trigger, polarity); 745 } 746 EXPORT_SYMBOL_GPL(acpi_register_gsi); 747 748 void acpi_unregister_gsi(u32 gsi) 749 { 750 if (__acpi_unregister_gsi) 751 __acpi_unregister_gsi(gsi); 752 } 753 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 754 755 #ifdef CONFIG_X86_LOCAL_APIC 756 static void __init acpi_set_irq_model_ioapic(void) 757 { 758 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 759 __acpi_register_gsi = acpi_register_gsi_ioapic; 760 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 761 acpi_ioapic = 1; 762 } 763 #endif 764 765 /* 766 * ACPI based hotplug support for CPU 767 */ 768 #ifdef CONFIG_ACPI_HOTPLUG_CPU 769 #include <acpi/processor.h> 770 771 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 772 { 773 #ifdef CONFIG_ACPI_NUMA 774 int nid; 775 776 nid = acpi_get_node(handle); 777 if (nid != NUMA_NO_NODE) { 778 set_apicid_to_node(physid, nid); 779 numa_set_node(cpu, nid); 780 } 781 #endif 782 return 0; 783 } 784 785 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu) 786 { 787 int cpu = topology_hotplug_apic(physid, acpi_id); 788 789 if (cpu < 0) { 790 pr_info("Unable to map lapic to logical cpu number\n"); 791 return cpu; 792 } 793 794 acpi_processor_set_pdc(handle); 795 acpi_map_cpu2node(handle, cpu, physid); 796 797 *pcpu = cpu; 798 return 0; 799 } 800 EXPORT_SYMBOL(acpi_map_cpu); 801 802 int acpi_unmap_cpu(int cpu) 803 { 804 #ifdef CONFIG_ACPI_NUMA 805 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 806 #endif 807 topology_hotunplug_apic(cpu); 808 return 0; 809 } 810 EXPORT_SYMBOL(acpi_unmap_cpu); 811 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 812 813 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 814 { 815 int ret = -ENOSYS; 816 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 817 int ioapic_id; 818 u64 addr; 819 struct ioapic_domain_cfg cfg = { 820 .type = IOAPIC_DOMAIN_DYNAMIC, 821 .ops = &mp_ioapic_irqdomain_ops, 822 }; 823 824 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 825 if (ioapic_id < 0) { 826 unsigned long long uid; 827 acpi_status status; 828 829 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 830 NULL, &uid); 831 if (ACPI_FAILURE(status)) { 832 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 833 return -EINVAL; 834 } 835 ioapic_id = (int)uid; 836 } 837 838 mutex_lock(&acpi_ioapic_lock); 839 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 840 mutex_unlock(&acpi_ioapic_lock); 841 #endif 842 843 return ret; 844 } 845 EXPORT_SYMBOL(acpi_register_ioapic); 846 847 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 848 { 849 int ret = -ENOSYS; 850 851 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 852 mutex_lock(&acpi_ioapic_lock); 853 ret = mp_unregister_ioapic(gsi_base); 854 mutex_unlock(&acpi_ioapic_lock); 855 #endif 856 857 return ret; 858 } 859 EXPORT_SYMBOL(acpi_unregister_ioapic); 860 861 /** 862 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 863 * has been registered 864 * @handle: ACPI handle of the IOAPIC device 865 * @gsi_base: GSI base associated with the IOAPIC 866 * 867 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 868 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 869 */ 870 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 871 { 872 int ret = 0; 873 874 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 875 mutex_lock(&acpi_ioapic_lock); 876 ret = mp_ioapic_registered(gsi_base); 877 mutex_unlock(&acpi_ioapic_lock); 878 #endif 879 880 return ret; 881 } 882 883 static int __init acpi_parse_sbf(struct acpi_table_header *table) 884 { 885 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 886 887 sbf_port = sb->cmos_index; /* Save CMOS port */ 888 889 return 0; 890 } 891 892 #ifdef CONFIG_HPET_TIMER 893 #include <asm/hpet.h> 894 895 static struct resource *hpet_res __initdata; 896 897 static int __init acpi_parse_hpet(struct acpi_table_header *table) 898 { 899 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 900 901 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 902 pr_warn("HPET timers must be located in memory.\n"); 903 return -1; 904 } 905 906 hpet_address = hpet_tbl->address.address; 907 hpet_blockid = hpet_tbl->sequence; 908 909 /* 910 * Some broken BIOSes advertise HPET at 0x0. We really do not 911 * want to allocate a resource there. 912 */ 913 if (!hpet_address) { 914 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 915 return 0; 916 } 917 #ifdef CONFIG_X86_64 918 /* 919 * Some even more broken BIOSes advertise HPET at 920 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 921 * some noise: 922 */ 923 if (hpet_address == 0xfed0000000000000UL) { 924 if (!hpet_force_user) { 925 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 926 hpet_tbl->id); 927 hpet_address = 0; 928 return 0; 929 } 930 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 931 hpet_tbl->id); 932 hpet_address >>= 32; 933 } 934 #endif 935 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 936 937 /* 938 * Allocate and initialize the HPET firmware resource for adding into 939 * the resource tree during the lateinit timeframe. 940 */ 941 #define HPET_RESOURCE_NAME_SIZE 9 942 hpet_res = memblock_alloc_or_panic(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 943 SMP_CACHE_BYTES); 944 945 hpet_res->name = (void *)&hpet_res[1]; 946 hpet_res->flags = IORESOURCE_MEM; 947 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 948 hpet_tbl->sequence); 949 950 hpet_res->start = hpet_address; 951 hpet_res->end = hpet_address + (1 * 1024) - 1; 952 953 return 0; 954 } 955 956 /* 957 * hpet_insert_resource inserts the HPET resources used into the resource 958 * tree. 959 */ 960 static __init int hpet_insert_resource(void) 961 { 962 if (!hpet_res) 963 return 1; 964 965 return insert_resource(&iomem_resource, hpet_res); 966 } 967 968 late_initcall(hpet_insert_resource); 969 970 #else 971 #define acpi_parse_hpet NULL 972 #endif 973 974 static int __init acpi_parse_fadt(struct acpi_table_header *table) 975 { 976 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 977 pr_debug("no legacy devices present\n"); 978 x86_platform.legacy.devices.pnpbios = 0; 979 } 980 981 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 982 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 983 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 984 pr_debug("i8042 controller is absent\n"); 985 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 986 } 987 988 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 989 pr_debug("not registering RTC platform device\n"); 990 x86_platform.legacy.rtc = 0; 991 } 992 993 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 994 pr_debug("probing for VGA not safe\n"); 995 x86_platform.legacy.no_vga = 1; 996 } 997 998 #ifdef CONFIG_X86_PM_TIMER 999 /* detect the location of the ACPI PM Timer */ 1000 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 1001 /* FADT rev. 2 */ 1002 if (acpi_gbl_FADT.xpm_timer_block.space_id != 1003 ACPI_ADR_SPACE_SYSTEM_IO) 1004 return 0; 1005 1006 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1007 /* 1008 * "X" fields are optional extensions to the original V1.0 1009 * fields, so we must selectively expand V1.0 fields if the 1010 * corresponding X field is zero. 1011 */ 1012 if (!pmtmr_ioport) 1013 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1014 } else { 1015 /* FADT rev. 1 */ 1016 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1017 } 1018 if (pmtmr_ioport) 1019 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 1020 #endif 1021 return 0; 1022 } 1023 1024 #ifdef CONFIG_X86_LOCAL_APIC 1025 /* 1026 * Parse LAPIC entries in MADT 1027 * returns 0 on success, < 0 on error 1028 */ 1029 1030 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1031 { 1032 int count; 1033 1034 if (!boot_cpu_has(X86_FEATURE_APIC)) 1035 return -ENODEV; 1036 1037 /* 1038 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1039 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1040 */ 1041 1042 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1043 acpi_parse_lapic_addr_ovr, 0); 1044 if (count < 0) { 1045 pr_err("Error parsing LAPIC address override entry\n"); 1046 return count; 1047 } 1048 1049 register_lapic_address(acpi_lapic_addr); 1050 1051 return count; 1052 } 1053 1054 static int __init acpi_parse_madt_lapic_entries(void) 1055 { 1056 int count, x2count = 0; 1057 struct acpi_subtable_proc madt_proc[2]; 1058 int ret; 1059 1060 if (!boot_cpu_has(X86_FEATURE_APIC)) 1061 return -ENODEV; 1062 1063 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1064 acpi_parse_sapic, MAX_LOCAL_APIC); 1065 1066 if (!count) { 1067 /* Check if there are valid LAPIC entries */ 1068 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_check_lapic, MAX_LOCAL_APIC); 1069 1070 /* 1071 * Enumerate the APIC IDs in the order that they appear in the 1072 * MADT, no matter LAPIC entry or x2APIC entry is used. 1073 */ 1074 memset(madt_proc, 0, sizeof(madt_proc)); 1075 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1076 madt_proc[0].handler = acpi_parse_lapic; 1077 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1078 madt_proc[1].handler = acpi_parse_x2apic; 1079 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1080 sizeof(struct acpi_table_madt), 1081 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1082 if (ret < 0) { 1083 pr_err("Error parsing LAPIC/X2APIC entries\n"); 1084 return ret; 1085 } 1086 count = madt_proc[0].count; 1087 x2count = madt_proc[1].count; 1088 } 1089 if (!count && !x2count) { 1090 pr_err("No LAPIC entries present\n"); 1091 /* TBD: Cleanup to allow fallback to MPS */ 1092 return -ENODEV; 1093 } else if (count < 0 || x2count < 0) { 1094 pr_err("Error parsing LAPIC entry\n"); 1095 /* TBD: Cleanup to allow fallback to MPS */ 1096 return count; 1097 } 1098 1099 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1100 acpi_parse_x2apic_nmi, 0); 1101 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1102 acpi_parse_lapic_nmi, 0); 1103 if (count < 0 || x2count < 0) { 1104 pr_err("Error parsing LAPIC NMI entry\n"); 1105 /* TBD: Cleanup to allow fallback to MPS */ 1106 return count; 1107 } 1108 return 0; 1109 } 1110 #endif /* CONFIG_X86_LOCAL_APIC */ 1111 1112 #ifdef CONFIG_X86_IO_APIC 1113 static void __init mp_config_acpi_legacy_irqs(void) 1114 { 1115 int i; 1116 struct mpc_intsrc mp_irq; 1117 1118 #ifdef CONFIG_EISA 1119 /* 1120 * Fabricate the legacy ISA bus (bus #31). 1121 */ 1122 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1123 #endif 1124 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1125 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1126 1127 /* 1128 * Use the default configuration for the IRQs 0-15. Unless 1129 * overridden by (MADT) interrupt source override entries. 1130 */ 1131 for (i = 0; i < nr_legacy_irqs(); i++) { 1132 int ioapic, pin; 1133 unsigned int dstapic; 1134 int idx; 1135 u32 gsi; 1136 1137 /* Locate the gsi that irq i maps to. */ 1138 if (acpi_isa_irq_to_gsi(i, &gsi)) 1139 continue; 1140 1141 /* 1142 * Locate the IOAPIC that manages the ISA IRQ. 1143 */ 1144 ioapic = mp_find_ioapic(gsi); 1145 if (ioapic < 0) 1146 continue; 1147 pin = mp_find_ioapic_pin(ioapic, gsi); 1148 dstapic = mpc_ioapic_id(ioapic); 1149 1150 for (idx = 0; idx < mp_irq_entries; idx++) { 1151 struct mpc_intsrc *irq = mp_irqs + idx; 1152 1153 /* Do we already have a mapping for this ISA IRQ? */ 1154 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1155 break; 1156 1157 /* Do we already have a mapping for this IOAPIC pin */ 1158 if (irq->dstapic == dstapic && irq->dstirq == pin) 1159 break; 1160 } 1161 1162 if (idx != mp_irq_entries) { 1163 pr_debug("ACPI: IRQ%d used by override.\n", i); 1164 continue; /* IRQ already used */ 1165 } 1166 1167 mp_irq.type = MP_INTSRC; 1168 mp_irq.irqflag = 0; /* Conforming */ 1169 mp_irq.srcbus = MP_ISA_BUS; 1170 mp_irq.dstapic = dstapic; 1171 mp_irq.irqtype = mp_INT; 1172 mp_irq.srcbusirq = i; /* Identity mapped */ 1173 mp_irq.dstirq = pin; 1174 1175 mp_save_irq(&mp_irq); 1176 } 1177 } 1178 1179 /* 1180 * Parse IOAPIC related entries in MADT 1181 * returns 0 on success, < 0 on error 1182 */ 1183 static int __init acpi_parse_madt_ioapic_entries(void) 1184 { 1185 int count; 1186 1187 /* 1188 * ACPI interpreter is required to complete interrupt setup, 1189 * so if it is off, don't enumerate the io-apics with ACPI. 1190 * If MPS is present, it will handle them, 1191 * otherwise the system will stay in PIC mode 1192 */ 1193 if (acpi_disabled || acpi_noirq) 1194 return -ENODEV; 1195 1196 if (!boot_cpu_has(X86_FEATURE_APIC)) 1197 return -ENODEV; 1198 1199 /* 1200 * if "noapic" boot option, don't look for IO-APICs 1201 */ 1202 if (ioapic_is_disabled) { 1203 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1204 return -ENODEV; 1205 } 1206 1207 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1208 MAX_IO_APICS); 1209 if (!count) { 1210 pr_err("No IOAPIC entries present\n"); 1211 return -ENODEV; 1212 } else if (count < 0) { 1213 pr_err("Error parsing IOAPIC entry\n"); 1214 return count; 1215 } 1216 1217 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1218 acpi_parse_int_src_ovr, 1219 irq_get_nr_irqs()); 1220 if (count < 0) { 1221 pr_err("Error parsing interrupt source overrides entry\n"); 1222 /* TBD: Cleanup to allow fallback to MPS */ 1223 return count; 1224 } 1225 1226 /* 1227 * If BIOS did not supply an INT_SRC_OVR for the SCI 1228 * pretend we got one so we can set the SCI flags. 1229 * But ignore setting up SCI on hardware reduced platforms. 1230 */ 1231 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1232 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1233 acpi_gbl_FADT.sci_interrupt); 1234 1235 /* Fill in identity legacy mappings where no override */ 1236 mp_config_acpi_legacy_irqs(); 1237 1238 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1239 acpi_parse_nmi_src, 1240 irq_get_nr_irqs()); 1241 if (count < 0) { 1242 pr_err("Error parsing NMI SRC entry\n"); 1243 /* TBD: Cleanup to allow fallback to MPS */ 1244 return count; 1245 } 1246 1247 return 0; 1248 } 1249 #else 1250 static inline int acpi_parse_madt_ioapic_entries(void) 1251 { 1252 return -1; 1253 } 1254 #endif /* !CONFIG_X86_IO_APIC */ 1255 1256 static void __init early_acpi_process_madt(void) 1257 { 1258 #ifdef CONFIG_X86_LOCAL_APIC 1259 int error; 1260 1261 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1262 1263 /* 1264 * Parse MADT LAPIC entries 1265 */ 1266 error = early_acpi_parse_madt_lapic_addr_ovr(); 1267 if (!error) { 1268 acpi_lapic = 1; 1269 smp_found_config = 1; 1270 } 1271 if (error == -EINVAL) { 1272 /* 1273 * Dell Precision Workstation 410, 610 come here. 1274 */ 1275 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1276 disable_acpi(); 1277 } 1278 } 1279 #endif 1280 } 1281 1282 static void __init acpi_process_madt(void) 1283 { 1284 #ifdef CONFIG_X86_LOCAL_APIC 1285 int error; 1286 1287 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1288 1289 /* 1290 * Parse MADT LAPIC entries 1291 */ 1292 error = acpi_parse_madt_lapic_entries(); 1293 if (!error) { 1294 acpi_lapic = 1; 1295 1296 /* 1297 * Parse MADT IO-APIC entries 1298 */ 1299 mutex_lock(&acpi_ioapic_lock); 1300 error = acpi_parse_madt_ioapic_entries(); 1301 mutex_unlock(&acpi_ioapic_lock); 1302 if (!error) { 1303 acpi_set_irq_model_ioapic(); 1304 1305 smp_found_config = 1; 1306 } 1307 1308 #ifdef CONFIG_ACPI_MADT_WAKEUP 1309 /* 1310 * Parse MADT MP Wake entry. 1311 */ 1312 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1313 acpi_parse_mp_wake, 1); 1314 #endif 1315 } 1316 if (error == -EINVAL) { 1317 /* 1318 * Dell Precision Workstation 410, 610 come here. 1319 */ 1320 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1321 disable_acpi(); 1322 } 1323 } else { 1324 /* 1325 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1326 * In the event an MPS table was found, forget it. 1327 * Boot with "acpi=off" to use MPS on such a system. 1328 */ 1329 if (smp_found_config) { 1330 pr_warn("No APIC-table, disabling MPS\n"); 1331 smp_found_config = 0; 1332 } 1333 } 1334 1335 /* 1336 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1337 * processors, where MPS only supports physical. 1338 */ 1339 if (acpi_lapic && acpi_ioapic) 1340 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1341 else if (acpi_lapic) 1342 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1343 #endif 1344 return; 1345 } 1346 1347 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1348 { 1349 if (!acpi_force) { 1350 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1351 acpi_noirq_set(); 1352 } 1353 return 0; 1354 } 1355 1356 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1357 { 1358 if (!acpi_force) { 1359 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1360 acpi_disable_pci(); 1361 } 1362 return 0; 1363 } 1364 1365 static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1366 { 1367 if (!acpi_force) { 1368 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1369 acpi_gbl_do_not_use_xsdt = TRUE; 1370 } else { 1371 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1372 } 1373 return 0; 1374 } 1375 1376 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1377 { 1378 if (!acpi_force) { 1379 pr_notice("%s detected: acpi off\n", d->ident); 1380 disable_acpi(); 1381 } else { 1382 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1383 } 1384 return 0; 1385 } 1386 1387 /* 1388 * Force ignoring BIOS IRQ0 override 1389 */ 1390 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1391 { 1392 if (!acpi_skip_timer_override) { 1393 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1394 d->ident); 1395 acpi_skip_timer_override = 1; 1396 } 1397 return 0; 1398 } 1399 1400 /* 1401 * ACPI offers an alternative platform interface model that removes 1402 * ACPI hardware requirements for platforms that do not implement 1403 * the PC Architecture. 1404 * 1405 * We initialize the Hardware-reduced ACPI model here: 1406 */ 1407 void __init acpi_generic_reduced_hw_init(void) 1408 { 1409 /* 1410 * Override x86_init functions and bypass legacy PIC in 1411 * hardware reduced ACPI mode. 1412 */ 1413 x86_init.timers.timer_init = x86_init_noop; 1414 x86_init.irqs.pre_vector_init = x86_init_noop; 1415 legacy_pic = &null_legacy_pic; 1416 } 1417 1418 static void __init acpi_reduced_hw_init(void) 1419 { 1420 if (acpi_gbl_reduced_hardware) 1421 x86_init.acpi.reduced_hw_early_init(); 1422 } 1423 1424 /* 1425 * If your system is blacklisted here, but you find that acpi=force 1426 * works for you, please contact linux-acpi@vger.kernel.org 1427 */ 1428 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1429 /* 1430 * Boxes that need ACPI disabled 1431 */ 1432 { 1433 .callback = dmi_disable_acpi, 1434 .ident = "IBM Thinkpad", 1435 .matches = { 1436 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1437 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1438 }, 1439 }, 1440 1441 /* 1442 * Boxes that need ACPI PCI IRQ routing disabled 1443 */ 1444 { 1445 .callback = disable_acpi_irq, 1446 .ident = "ASUS A7V", 1447 .matches = { 1448 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1449 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1450 /* newer BIOS, Revision 1011, does work */ 1451 DMI_MATCH(DMI_BIOS_VERSION, 1452 "ASUS A7V ACPI BIOS Revision 1007"), 1453 }, 1454 }, 1455 { 1456 /* 1457 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1458 * for LPC bridge, which is needed for the PCI 1459 * interrupt links to work. DSDT fix is in bug 5966. 1460 * 2645, 2646 model numbers are shared with 600/600E/600X 1461 */ 1462 .callback = disable_acpi_irq, 1463 .ident = "IBM Thinkpad 600 Series 2645", 1464 .matches = { 1465 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1466 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1467 }, 1468 }, 1469 { 1470 .callback = disable_acpi_irq, 1471 .ident = "IBM Thinkpad 600 Series 2646", 1472 .matches = { 1473 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1474 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1475 }, 1476 }, 1477 /* 1478 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1479 */ 1480 { /* _BBN 0 bug */ 1481 .callback = disable_acpi_pci, 1482 .ident = "ASUS PR-DLS", 1483 .matches = { 1484 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1485 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1486 DMI_MATCH(DMI_BIOS_VERSION, 1487 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1488 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1489 }, 1490 }, 1491 { 1492 .callback = disable_acpi_pci, 1493 .ident = "Acer TravelMate 36x Laptop", 1494 .matches = { 1495 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1496 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1497 }, 1498 }, 1499 /* 1500 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1501 */ 1502 { 1503 .callback = disable_acpi_xsdt, 1504 .ident = "Advantech DAC-BJ01", 1505 .matches = { 1506 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1507 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1508 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1509 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1510 }, 1511 }, 1512 {} 1513 }; 1514 1515 /* second table for DMI checks that should run after early-quirks */ 1516 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1517 /* 1518 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1519 * which includes some code which overrides all temperature 1520 * trip points to 16C if the INTIN2 input of the I/O APIC 1521 * is enabled. This input is incorrectly designated the 1522 * ISA IRQ 0 via an interrupt source override even though 1523 * it is wired to the output of the master 8259A and INTIN0 1524 * is not connected at all. Force ignoring BIOS IRQ0 1525 * override in that cases. 1526 */ 1527 { 1528 .callback = dmi_ignore_irq0_timer_override, 1529 .ident = "HP nx6115 laptop", 1530 .matches = { 1531 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1532 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1533 }, 1534 }, 1535 { 1536 .callback = dmi_ignore_irq0_timer_override, 1537 .ident = "HP NX6125 laptop", 1538 .matches = { 1539 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1540 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1541 }, 1542 }, 1543 { 1544 .callback = dmi_ignore_irq0_timer_override, 1545 .ident = "HP NX6325 laptop", 1546 .matches = { 1547 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1548 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1549 }, 1550 }, 1551 { 1552 .callback = dmi_ignore_irq0_timer_override, 1553 .ident = "HP 6715b laptop", 1554 .matches = { 1555 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1556 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1557 }, 1558 }, 1559 { 1560 .callback = dmi_ignore_irq0_timer_override, 1561 .ident = "FUJITSU SIEMENS", 1562 .matches = { 1563 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1564 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1565 }, 1566 }, 1567 {} 1568 }; 1569 1570 /* 1571 * acpi_boot_table_init() and acpi_boot_init() 1572 * called from setup_arch(), always. 1573 * 1. checksums all tables 1574 * 2. enumerates lapics 1575 * 3. enumerates io-apics 1576 * 1577 * acpi_table_init() is separate to allow reading SRAT without 1578 * other side effects. 1579 * 1580 * side effects of acpi_boot_init: 1581 * acpi_lapic = 1 if LAPIC found 1582 * acpi_ioapic = 1 if IOAPIC found 1583 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1584 * if acpi_blacklisted() acpi_disabled = 1; 1585 * acpi_irq_model=... 1586 * ... 1587 */ 1588 1589 void __init acpi_boot_table_init(void) 1590 { 1591 dmi_check_system(acpi_dmi_table); 1592 1593 /* 1594 * If acpi_disabled, bail out 1595 */ 1596 if (acpi_disabled) 1597 return; 1598 1599 /* 1600 * Initialize the ACPI boot-time table parser. 1601 */ 1602 if (acpi_locate_initial_tables()) 1603 disable_acpi(); 1604 else 1605 acpi_reserve_initial_tables(); 1606 } 1607 1608 int __init early_acpi_boot_init(void) 1609 { 1610 if (acpi_disabled) 1611 return 1; 1612 1613 acpi_table_init_complete(); 1614 1615 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1616 1617 /* 1618 * blacklist may disable ACPI entirely 1619 */ 1620 if (acpi_blacklisted()) { 1621 if (acpi_force) { 1622 pr_warn("acpi=force override\n"); 1623 } else { 1624 pr_warn("Disabling ACPI support\n"); 1625 disable_acpi(); 1626 return 1; 1627 } 1628 } 1629 1630 /* 1631 * Process the Multiple APIC Description Table (MADT), if present 1632 */ 1633 early_acpi_process_madt(); 1634 1635 /* 1636 * Hardware-reduced ACPI mode initialization: 1637 */ 1638 acpi_reduced_hw_init(); 1639 1640 return 0; 1641 } 1642 1643 int __init acpi_boot_init(void) 1644 { 1645 /* those are executed after early-quirks are executed */ 1646 dmi_check_system(acpi_dmi_table_late); 1647 1648 /* 1649 * If acpi_disabled, bail out 1650 */ 1651 if (acpi_disabled) 1652 return 1; 1653 1654 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1655 1656 /* 1657 * set sci_int and PM timer address 1658 */ 1659 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1660 1661 /* 1662 * Process the Multiple APIC Description Table (MADT), if present 1663 */ 1664 acpi_process_madt(); 1665 1666 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1667 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1668 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1669 1670 if (!acpi_noirq) 1671 x86_init.pci.init = pci_acpi_init; 1672 1673 acpi_parse_spcr(earlycon_acpi_spcr_enable, acpi_spcr_add); 1674 1675 return 0; 1676 } 1677 1678 static int __init parse_acpi(char *arg) 1679 { 1680 if (!arg) 1681 return -EINVAL; 1682 1683 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1684 if (strcmp(arg, "off") == 0) { 1685 disable_acpi(); 1686 } 1687 /* acpi=force to over-ride black-list */ 1688 else if (strcmp(arg, "force") == 0) { 1689 acpi_force = 1; 1690 acpi_disabled = 0; 1691 } 1692 /* acpi=strict disables out-of-spec workarounds */ 1693 else if (strcmp(arg, "strict") == 0) { 1694 acpi_strict = 1; 1695 } 1696 /* acpi=rsdt use RSDT instead of XSDT */ 1697 else if (strcmp(arg, "rsdt") == 0) { 1698 acpi_gbl_do_not_use_xsdt = TRUE; 1699 } 1700 /* "acpi=noirq" disables ACPI interrupt routing */ 1701 else if (strcmp(arg, "noirq") == 0) { 1702 acpi_noirq_set(); 1703 } 1704 /* "acpi=copy_dsdt" copies DSDT */ 1705 else if (strcmp(arg, "copy_dsdt") == 0) { 1706 acpi_gbl_copy_dsdt_locally = 1; 1707 } 1708 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1709 else if (strcmp(arg, "nocmcff") == 0) { 1710 acpi_disable_cmcff = 1; 1711 } 1712 /* "acpi=spcr" adds the SPCR-provided console as a preferred one */ 1713 else if (strcmp(arg, "spcr") == 0) { 1714 acpi_spcr_add = 1; 1715 } else { 1716 /* Core will printk when we return error. */ 1717 return -EINVAL; 1718 } 1719 return 0; 1720 } 1721 early_param("acpi", parse_acpi); 1722 1723 static int __init parse_acpi_bgrt(char *arg) 1724 { 1725 acpi_nobgrt = true; 1726 return 0; 1727 } 1728 early_param("bgrt_disable", parse_acpi_bgrt); 1729 1730 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1731 static int __init parse_pci(char *arg) 1732 { 1733 if (arg && strcmp(arg, "noacpi") == 0) 1734 acpi_disable_pci(); 1735 return 0; 1736 } 1737 early_param("pci", parse_pci); 1738 1739 int __init acpi_mps_check(void) 1740 { 1741 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1742 /* mptable code is not built-in*/ 1743 1744 /* 1745 * Xen disables ACPI in PV DomU guests but it still emulates APIC and 1746 * supports SMP. Returning early here ensures that APIC is not disabled 1747 * unnecessarily and the guest is not limited to a single vCPU. 1748 */ 1749 if (xen_pv_domain() && !xen_initial_domain()) 1750 return 0; 1751 1752 if (acpi_disabled || acpi_noirq) { 1753 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1754 return 1; 1755 } 1756 #endif 1757 return 0; 1758 } 1759 1760 #ifdef CONFIG_X86_IO_APIC 1761 static int __init parse_acpi_skip_timer_override(char *arg) 1762 { 1763 acpi_skip_timer_override = 1; 1764 return 0; 1765 } 1766 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1767 1768 static int __init parse_acpi_use_timer_override(char *arg) 1769 { 1770 acpi_use_timer_override = 1; 1771 return 0; 1772 } 1773 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1774 #endif /* CONFIG_X86_IO_APIC */ 1775 1776 static int __init setup_acpi_sci(char *s) 1777 { 1778 if (!s) 1779 return -EINVAL; 1780 if (!strcmp(s, "edge")) 1781 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1782 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1783 else if (!strcmp(s, "level")) 1784 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1785 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1786 else if (!strcmp(s, "high")) 1787 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1788 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1789 else if (!strcmp(s, "low")) 1790 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1791 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1792 else 1793 return -EINVAL; 1794 return 0; 1795 } 1796 early_param("acpi_sci", setup_acpi_sci); 1797 1798 int __acpi_acquire_global_lock(unsigned int *lock) 1799 { 1800 unsigned int old, new, val; 1801 1802 old = READ_ONCE(*lock); 1803 do { 1804 val = (old >> 1) & 0x1; 1805 new = (old & ~0x3) + 2 + val; 1806 } while (!try_cmpxchg(lock, &old, new)); 1807 1808 if (val) 1809 return 0; 1810 1811 return -1; 1812 } 1813 1814 int __acpi_release_global_lock(unsigned int *lock) 1815 { 1816 unsigned int old, new; 1817 1818 old = READ_ONCE(*lock); 1819 do { 1820 new = old & ~0x3; 1821 } while (!try_cmpxchg(lock, &old, new)); 1822 return old & 0x1; 1823 } 1824 1825 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1826 { 1827 e820__range_add(addr, size, E820_TYPE_NVS); 1828 e820__update_table_print(); 1829 } 1830 1831 void x86_default_set_root_pointer(u64 addr) 1832 { 1833 boot_params.acpi_rsdp_addr = addr; 1834 } 1835 1836 u64 x86_default_get_root_pointer(void) 1837 { 1838 return boot_params.acpi_rsdp_addr; 1839 } 1840 1841 #ifdef CONFIG_XEN_PV 1842 void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size) 1843 { 1844 return ioremap_cache(phys, size); 1845 } 1846 1847 void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, acpi_size size) = 1848 x86_acpi_os_ioremap; 1849 EXPORT_SYMBOL_GPL(acpi_os_ioremap); 1850 #endif 1851