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 */ 38static int __initdata acpi_force = 0; 39int acpi_disabled; 40EXPORT_SYMBOL(acpi_disabled); 41 42#ifdef CONFIG_X86_64 43# include <asm/proto.h> 44#endif /* X86 */ 45 46int acpi_noirq; /* skip ACPI IRQ initialization */ 47static int acpi_nobgrt; /* skip ACPI BGRT */ 48int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 49EXPORT_SYMBOL(acpi_pci_disabled); 50 51int acpi_lapic; 52int acpi_ioapic; 53int acpi_strict; 54int acpi_disable_cmcff; 55bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 56 57/* ACPI SCI override configuration */ 58u8 acpi_sci_flags __initdata; 59u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 60int acpi_skip_timer_override __initdata; 61int acpi_use_timer_override __initdata; 62int acpi_fix_pin2_polarity __initdata; 63 64#ifdef CONFIG_X86_LOCAL_APIC 65static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 66static bool has_lapic_cpus __initdata; 67static bool acpi_support_online_capable; 68#endif 69 70#ifdef CONFIG_X86_64 71/* Physical address of the Multiprocessor Wakeup Structure mailbox */ 72static u64 acpi_mp_wake_mailbox_paddr; 73/* Virtual address of the Multiprocessor Wakeup Structure mailbox */ 74static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox; 75#endif 76 77#ifdef CONFIG_X86_IO_APIC 78/* 79 * Locks related to IOAPIC hotplug 80 * Hotplug side: 81 * ->device_hotplug_lock 82 * ->acpi_ioapic_lock 83 * ->ioapic_lock 84 * Interrupt mapping side: 85 * ->acpi_ioapic_lock 86 * ->ioapic_mutex 87 * ->ioapic_lock 88 */ 89static DEFINE_MUTEX(acpi_ioapic_lock); 90#endif 91 92/* -------------------------------------------------------------------------- 93 Boot-time Configuration 94 -------------------------------------------------------------------------- */ 95 96/* 97 * The default interrupt routing model is PIC (8259). This gets 98 * overridden if IOAPICs are enumerated (below). 99 */ 100enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 101 102 103/* 104 * ISA irqs by default are the first 16 gsis but can be 105 * any gsi as specified by an interrupt source override. 106 */ 107static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 109}; 110 111/* 112 * This is just a simple wrapper around early_memremap(), 113 * with sanity checks for phys == 0 and size == 0. 114 */ 115void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 116{ 117 118 if (!phys || !size) 119 return NULL; 120 121 return early_memremap(phys, size); 122} 123 124void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 125{ 126 if (!map || !size) 127 return; 128 129 early_memunmap(map, size); 130} 131 132#ifdef CONFIG_X86_LOCAL_APIC 133static int __init acpi_parse_madt(struct acpi_table_header *table) 134{ 135 struct acpi_table_madt *madt = NULL; 136 137 if (!boot_cpu_has(X86_FEATURE_APIC)) 138 return -EINVAL; 139 140 madt = (struct acpi_table_madt *)table; 141 if (!madt) { 142 pr_warn("Unable to map MADT\n"); 143 return -ENODEV; 144 } 145 146 if (madt->address) { 147 acpi_lapic_addr = (u64) madt->address; 148 149 pr_debug("Local APIC address 0x%08x\n", madt->address); 150 } 151 152 if (madt->flags & ACPI_MADT_PCAT_COMPAT) 153 legacy_pic_pcat_compat(); 154 155 /* ACPI 6.3 and newer support the online capable bit. */ 156 if (acpi_gbl_FADT.header.revision > 6 || 157 (acpi_gbl_FADT.header.revision == 6 && 158 acpi_gbl_FADT.minor_revision >= 3)) 159 acpi_support_online_capable = true; 160 161 default_acpi_madt_oem_check(madt->header.oem_id, 162 madt->header.oem_table_id); 163 164 return 0; 165} 166 167static bool __init acpi_is_processor_usable(u32 lapic_flags) 168{ 169 if (lapic_flags & ACPI_MADT_ENABLED) 170 return true; 171 172 if (!acpi_support_online_capable || 173 (lapic_flags & ACPI_MADT_ONLINE_CAPABLE)) 174 return true; 175 176 return false; 177} 178 179static int __init 180acpi_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 236static int __init 237acpi_parse_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 acpi_table_print_madt_entry(&header->common); 247 248 /* Ignore invalid ID */ 249 if (processor->id == 0xff) 250 return 0; 251 252 /* don't register processors that can not be onlined */ 253 if (!acpi_is_processor_usable(processor->lapic_flags)) 254 return 0; 255 256 /* 257 * We need to register disabled CPU as well to permit 258 * counting disabled CPUs. This allows us to size 259 * cpus_possible_map more accurately, to permit 260 * to not preallocating memory for all NR_CPUS 261 * when we use CPU hotplug. 262 */ 263 topology_register_apic(processor->id, /* APIC ID */ 264 processor->processor_id, /* ACPI ID */ 265 processor->lapic_flags & ACPI_MADT_ENABLED); 266 267 has_lapic_cpus = true; 268 return 0; 269} 270 271static int __init 272acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 273{ 274 struct acpi_madt_local_sapic *processor = NULL; 275 276 processor = (struct acpi_madt_local_sapic *)header; 277 278 if (BAD_MADT_ENTRY(processor, end)) 279 return -EINVAL; 280 281 acpi_table_print_madt_entry(&header->common); 282 283 topology_register_apic((processor->id << 8) | processor->eid,/* APIC ID */ 284 processor->processor_id, /* ACPI ID */ 285 processor->lapic_flags & ACPI_MADT_ENABLED); 286 287 return 0; 288} 289 290static int __init 291acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 292 const unsigned long end) 293{ 294 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 295 296 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 297 298 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 299 return -EINVAL; 300 301 acpi_table_print_madt_entry(&header->common); 302 303 acpi_lapic_addr = lapic_addr_ovr->address; 304 305 return 0; 306} 307 308static int __init 309acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 310 const unsigned long end) 311{ 312 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 313 314 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 315 316 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 317 return -EINVAL; 318 319 acpi_table_print_madt_entry(&header->common); 320 321 if (x2apic_nmi->lint != 1) 322 pr_warn("NMI not connected to LINT 1!\n"); 323 324 return 0; 325} 326 327static int __init 328acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 329{ 330 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 331 332 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 333 334 if (BAD_MADT_ENTRY(lapic_nmi, end)) 335 return -EINVAL; 336 337 acpi_table_print_madt_entry(&header->common); 338 339 if (lapic_nmi->lint != 1) 340 pr_warn("NMI not connected to LINT 1!\n"); 341 342 return 0; 343} 344 345#ifdef CONFIG_X86_64 346static int acpi_wakeup_cpu(u32 apicid, unsigned long start_ip) 347{ 348 /* 349 * Remap mailbox memory only for the first call to acpi_wakeup_cpu(). 350 * 351 * Wakeup of secondary CPUs is fully serialized in the core code. 352 * No need to protect acpi_mp_wake_mailbox from concurrent accesses. 353 */ 354 if (!acpi_mp_wake_mailbox) { 355 acpi_mp_wake_mailbox = memremap(acpi_mp_wake_mailbox_paddr, 356 sizeof(*acpi_mp_wake_mailbox), 357 MEMREMAP_WB); 358 } 359 360 /* 361 * Mailbox memory is shared between the firmware and OS. Firmware will 362 * listen on mailbox command address, and once it receives the wakeup 363 * command, the CPU associated with the given apicid will be booted. 364 * 365 * The value of 'apic_id' and 'wakeup_vector' must be visible to the 366 * firmware before the wakeup command is visible. smp_store_release() 367 * ensures ordering and visibility. 368 */ 369 acpi_mp_wake_mailbox->apic_id = apicid; 370 acpi_mp_wake_mailbox->wakeup_vector = start_ip; 371 smp_store_release(&acpi_mp_wake_mailbox->command, 372 ACPI_MP_WAKE_COMMAND_WAKEUP); 373 374 /* 375 * Wait for the CPU to wake up. 376 * 377 * The CPU being woken up is essentially in a spin loop waiting to be 378 * woken up. It should not take long for it wake up and acknowledge by 379 * zeroing out ->command. 380 * 381 * ACPI specification doesn't provide any guidance on how long kernel 382 * has to wait for a wake up acknowledgement. It also doesn't provide 383 * a way to cancel a wake up request if it takes too long. 384 * 385 * In TDX environment, the VMM has control over how long it takes to 386 * wake up secondary. It can postpone scheduling secondary vCPU 387 * indefinitely. Giving up on wake up request and reporting error opens 388 * possible attack vector for VMM: it can wake up a secondary CPU when 389 * kernel doesn't expect it. Wait until positive result of the wake up 390 * request. 391 */ 392 while (READ_ONCE(acpi_mp_wake_mailbox->command)) 393 cpu_relax(); 394 395 return 0; 396} 397#endif /* CONFIG_X86_64 */ 398#endif /* CONFIG_X86_LOCAL_APIC */ 399 400#ifdef CONFIG_X86_IO_APIC 401#define MP_ISA_BUS 0 402 403static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 404 u8 trigger, u32 gsi); 405 406static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 407 u32 gsi) 408{ 409 /* 410 * Check bus_irq boundary. 411 */ 412 if (bus_irq >= NR_IRQS_LEGACY) { 413 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 414 return; 415 } 416 417 /* 418 * TBD: This check is for faulty timer entries, where the override 419 * erroneously sets the trigger to level, resulting in a HUGE 420 * increase of timer interrupts! 421 */ 422 if ((bus_irq == 0) && (trigger == 3)) 423 trigger = 1; 424 425 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 426 return; 427 /* 428 * Reset default identity mapping if gsi is also an legacy IRQ, 429 * otherwise there will be more than one entry with the same GSI 430 * and acpi_isa_irq_to_gsi() may give wrong result. 431 */ 432 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 433 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 434 isa_irq_to_gsi[bus_irq] = gsi; 435} 436 437static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 438 int polarity) 439{ 440#ifdef CONFIG_X86_MPPARSE 441 struct mpc_intsrc mp_irq; 442 struct pci_dev *pdev; 443 unsigned char number; 444 unsigned int devfn; 445 int ioapic; 446 u8 pin; 447 448 if (!acpi_ioapic) 449 return; 450 if (!dev || !dev_is_pci(dev)) 451 return; 452 453 pdev = to_pci_dev(dev); 454 number = pdev->bus->number; 455 devfn = pdev->devfn; 456 pin = pdev->pin; 457 /* print the entry should happen on mptable identically */ 458 mp_irq.type = MP_INTSRC; 459 mp_irq.irqtype = mp_INT; 460 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 461 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 462 mp_irq.srcbus = number; 463 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 464 ioapic = mp_find_ioapic(gsi); 465 mp_irq.dstapic = mpc_ioapic_id(ioapic); 466 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 467 468 mp_save_irq(&mp_irq); 469#endif 470} 471 472static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 473 u8 trigger, u32 gsi) 474{ 475 struct mpc_intsrc mp_irq; 476 int ioapic, pin; 477 478 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 479 ioapic = mp_find_ioapic(gsi); 480 if (ioapic < 0) { 481 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 482 return ioapic; 483 } 484 485 pin = mp_find_ioapic_pin(ioapic, gsi); 486 487 mp_irq.type = MP_INTSRC; 488 mp_irq.irqtype = mp_INT; 489 mp_irq.irqflag = (trigger << 2) | polarity; 490 mp_irq.srcbus = MP_ISA_BUS; 491 mp_irq.srcbusirq = bus_irq; 492 mp_irq.dstapic = mpc_ioapic_id(ioapic); 493 mp_irq.dstirq = pin; 494 495 mp_save_irq(&mp_irq); 496 497 return 0; 498} 499 500static int __init 501acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 502{ 503 struct acpi_madt_io_apic *ioapic = NULL; 504 struct ioapic_domain_cfg cfg = { 505 .type = IOAPIC_DOMAIN_DYNAMIC, 506 .ops = &mp_ioapic_irqdomain_ops, 507 }; 508 509 ioapic = (struct acpi_madt_io_apic *)header; 510 511 if (BAD_MADT_ENTRY(ioapic, end)) 512 return -EINVAL; 513 514 acpi_table_print_madt_entry(&header->common); 515 516 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 517 if (ioapic->global_irq_base < nr_legacy_irqs()) 518 cfg.type = IOAPIC_DOMAIN_LEGACY; 519 520 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 521 &cfg); 522 523 return 0; 524} 525 526/* 527 * Parse Interrupt Source Override for the ACPI SCI 528 */ 529static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 530{ 531 if (trigger == 0) /* compatible SCI trigger is level */ 532 trigger = 3; 533 534 if (polarity == 0) /* compatible SCI polarity is low */ 535 polarity = 3; 536 537 /* Command-line over-ride via acpi_sci= */ 538 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 539 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 540 541 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 542 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 543 544 if (bus_irq < NR_IRQS_LEGACY) 545 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 546 else 547 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 548 549 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 550 551 /* 552 * stash over-ride to indicate we've been here 553 * and for later update of acpi_gbl_FADT 554 */ 555 acpi_sci_override_gsi = gsi; 556 return; 557} 558 559static int __init 560acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 561 const unsigned long end) 562{ 563 struct acpi_madt_interrupt_override *intsrc = NULL; 564 565 intsrc = (struct acpi_madt_interrupt_override *)header; 566 567 if (BAD_MADT_ENTRY(intsrc, end)) 568 return -EINVAL; 569 570 acpi_table_print_madt_entry(&header->common); 571 572 if (intsrc->source_irq < NR_IRQS_LEGACY) 573 acpi_int_src_ovr[intsrc->source_irq] = true; 574 575 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 576 acpi_sci_ioapic_setup(intsrc->source_irq, 577 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 578 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 579 intsrc->global_irq); 580 return 0; 581 } 582 583 if (intsrc->source_irq == 0) { 584 if (acpi_skip_timer_override) { 585 pr_warn("BIOS IRQ0 override ignored.\n"); 586 return 0; 587 } 588 589 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 590 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 591 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 592 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 593 } 594 } 595 596 mp_override_legacy_irq(intsrc->source_irq, 597 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 598 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 599 intsrc->global_irq); 600 601 return 0; 602} 603 604static int __init 605acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 606{ 607 struct acpi_madt_nmi_source *nmi_src = NULL; 608 609 nmi_src = (struct acpi_madt_nmi_source *)header; 610 611 if (BAD_MADT_ENTRY(nmi_src, end)) 612 return -EINVAL; 613 614 acpi_table_print_madt_entry(&header->common); 615 616 /* TBD: Support nimsrc entries? */ 617 618 return 0; 619} 620 621#endif /* CONFIG_X86_IO_APIC */ 622 623/* 624 * acpi_pic_sci_set_trigger() 625 * 626 * use ELCR to set PIC-mode trigger type for SCI 627 * 628 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 629 * it may require Edge Trigger -- use "acpi_sci=edge" 630 * 631 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 632 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 633 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 634 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 635 */ 636 637void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 638{ 639 unsigned int mask = 1 << irq; 640 unsigned int old, new; 641 642 /* Real old ELCR mask */ 643 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 644 645 /* 646 * If we use ACPI to set PCI IRQs, then we should clear ELCR 647 * since we will set it correctly as we enable the PCI irq 648 * routing. 649 */ 650 new = acpi_noirq ? old : 0; 651 652 /* 653 * Update SCI information in the ELCR, it isn't in the PCI 654 * routing tables.. 655 */ 656 switch (trigger) { 657 case 1: /* Edge - clear */ 658 new &= ~mask; 659 break; 660 case 3: /* Level - set */ 661 new |= mask; 662 break; 663 } 664 665 if (old == new) 666 return; 667 668 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 669 outb(new, PIC_ELCR1); 670 outb(new >> 8, PIC_ELCR2); 671} 672 673int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 674{ 675 int rc, irq, trigger, polarity; 676 677 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 678 *irqp = gsi; 679 return 0; 680 } 681 682 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 683 if (rc) 684 return rc; 685 686 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 687 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 688 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 689 if (irq < 0) 690 return irq; 691 692 *irqp = irq; 693 return 0; 694} 695EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 696 697int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 698{ 699 if (isa_irq < nr_legacy_irqs() && 700 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 701 *gsi = isa_irq_to_gsi[isa_irq]; 702 return 0; 703 } 704 705 return -1; 706} 707 708static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 709 int trigger, int polarity) 710{ 711#ifdef CONFIG_PCI 712 /* 713 * Make sure all (legacy) PCI IRQs are set as level-triggered. 714 */ 715 if (trigger == ACPI_LEVEL_SENSITIVE) 716 elcr_set_level_irq(gsi); 717#endif 718 719 return gsi; 720} 721 722#ifdef CONFIG_X86_LOCAL_APIC 723static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 724 int trigger, int polarity) 725{ 726 int irq = gsi; 727#ifdef CONFIG_X86_IO_APIC 728 int node; 729 struct irq_alloc_info info; 730 731 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 732 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 733 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 734 ioapic_set_alloc_attr(&info, node, trigger, polarity); 735 736 mutex_lock(&acpi_ioapic_lock); 737 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 738 /* Don't set up the ACPI SCI because it's already set up */ 739 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 740 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 741 mutex_unlock(&acpi_ioapic_lock); 742#endif 743 744 return irq; 745} 746 747static void acpi_unregister_gsi_ioapic(u32 gsi) 748{ 749#ifdef CONFIG_X86_IO_APIC 750 int irq; 751 752 mutex_lock(&acpi_ioapic_lock); 753 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 754 if (irq > 0) 755 mp_unmap_irq(irq); 756 mutex_unlock(&acpi_ioapic_lock); 757#endif 758} 759#endif 760 761int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 762 int trigger, int polarity) = acpi_register_gsi_pic; 763void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 764 765#ifdef CONFIG_ACPI_SLEEP 766int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 767#else 768int (*acpi_suspend_lowlevel)(void); 769#endif 770 771/* 772 * success: return IRQ number (>=0) 773 * failure: return < 0 774 */ 775int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 776{ 777 return __acpi_register_gsi(dev, gsi, trigger, polarity); 778} 779EXPORT_SYMBOL_GPL(acpi_register_gsi); 780 781void acpi_unregister_gsi(u32 gsi) 782{ 783 if (__acpi_unregister_gsi) 784 __acpi_unregister_gsi(gsi); 785} 786EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 787 788#ifdef CONFIG_X86_LOCAL_APIC 789static void __init acpi_set_irq_model_ioapic(void) 790{ 791 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 792 __acpi_register_gsi = acpi_register_gsi_ioapic; 793 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 794 acpi_ioapic = 1; 795} 796#endif 797 798/* 799 * ACPI based hotplug support for CPU 800 */ 801#ifdef CONFIG_ACPI_HOTPLUG_CPU 802#include <acpi/processor.h> 803 804static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 805{ 806#ifdef CONFIG_ACPI_NUMA 807 int nid; 808 809 nid = acpi_get_node(handle); 810 if (nid != NUMA_NO_NODE) { 811 set_apicid_to_node(physid, nid); 812 numa_set_node(cpu, nid); 813 } 814#endif 815 return 0; 816} 817 818int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu) 819{ 820 int cpu = topology_hotplug_apic(physid, acpi_id); 821 822 if (cpu < 0) { 823 pr_info("Unable to map lapic to logical cpu number\n"); 824 return cpu; 825 } 826 827 acpi_processor_set_pdc(handle); 828 acpi_map_cpu2node(handle, cpu, physid); 829 830 *pcpu = cpu; 831 return 0; 832} 833EXPORT_SYMBOL(acpi_map_cpu); 834 835int acpi_unmap_cpu(int cpu) 836{ 837#ifdef CONFIG_ACPI_NUMA 838 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 839#endif 840 topology_hotunplug_apic(cpu); 841 return 0; 842} 843EXPORT_SYMBOL(acpi_unmap_cpu); 844#endif /* CONFIG_ACPI_HOTPLUG_CPU */ 845 846int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 847{ 848 int ret = -ENOSYS; 849#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 850 int ioapic_id; 851 u64 addr; 852 struct ioapic_domain_cfg cfg = { 853 .type = IOAPIC_DOMAIN_DYNAMIC, 854 .ops = &mp_ioapic_irqdomain_ops, 855 }; 856 857 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 858 if (ioapic_id < 0) { 859 unsigned long long uid; 860 acpi_status status; 861 862 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 863 NULL, &uid); 864 if (ACPI_FAILURE(status)) { 865 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 866 return -EINVAL; 867 } 868 ioapic_id = (int)uid; 869 } 870 871 mutex_lock(&acpi_ioapic_lock); 872 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 873 mutex_unlock(&acpi_ioapic_lock); 874#endif 875 876 return ret; 877} 878EXPORT_SYMBOL(acpi_register_ioapic); 879 880int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 881{ 882 int ret = -ENOSYS; 883 884#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 885 mutex_lock(&acpi_ioapic_lock); 886 ret = mp_unregister_ioapic(gsi_base); 887 mutex_unlock(&acpi_ioapic_lock); 888#endif 889 890 return ret; 891} 892EXPORT_SYMBOL(acpi_unregister_ioapic); 893 894/** 895 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 896 * has been registered 897 * @handle: ACPI handle of the IOAPIC device 898 * @gsi_base: GSI base associated with the IOAPIC 899 * 900 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 901 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 902 */ 903int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 904{ 905 int ret = 0; 906 907#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 908 mutex_lock(&acpi_ioapic_lock); 909 ret = mp_ioapic_registered(gsi_base); 910 mutex_unlock(&acpi_ioapic_lock); 911#endif 912 913 return ret; 914} 915 916static int __init acpi_parse_sbf(struct acpi_table_header *table) 917{ 918 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 919 920 sbf_port = sb->cmos_index; /* Save CMOS port */ 921 922 return 0; 923} 924 925#ifdef CONFIG_HPET_TIMER 926#include <asm/hpet.h> 927 928static struct resource *hpet_res __initdata; 929 930static int __init acpi_parse_hpet(struct acpi_table_header *table) 931{ 932 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 933 934 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 935 pr_warn("HPET timers must be located in memory.\n"); 936 return -1; 937 } 938 939 hpet_address = hpet_tbl->address.address; 940 hpet_blockid = hpet_tbl->sequence; 941 942 /* 943 * Some broken BIOSes advertise HPET at 0x0. We really do not 944 * want to allocate a resource there. 945 */ 946 if (!hpet_address) { 947 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 948 return 0; 949 } 950#ifdef CONFIG_X86_64 951 /* 952 * Some even more broken BIOSes advertise HPET at 953 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 954 * some noise: 955 */ 956 if (hpet_address == 0xfed0000000000000UL) { 957 if (!hpet_force_user) { 958 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 959 hpet_tbl->id); 960 hpet_address = 0; 961 return 0; 962 } 963 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 964 hpet_tbl->id); 965 hpet_address >>= 32; 966 } 967#endif 968 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 969 970 /* 971 * Allocate and initialize the HPET firmware resource for adding into 972 * the resource tree during the lateinit timeframe. 973 */ 974#define HPET_RESOURCE_NAME_SIZE 9 975 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 976 SMP_CACHE_BYTES); 977 if (!hpet_res) 978 panic("%s: Failed to allocate %zu bytes\n", __func__, 979 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 980 981 hpet_res->name = (void *)&hpet_res[1]; 982 hpet_res->flags = IORESOURCE_MEM; 983 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 984 hpet_tbl->sequence); 985 986 hpet_res->start = hpet_address; 987 hpet_res->end = hpet_address + (1 * 1024) - 1; 988 989 return 0; 990} 991 992/* 993 * hpet_insert_resource inserts the HPET resources used into the resource 994 * tree. 995 */ 996static __init int hpet_insert_resource(void) 997{ 998 if (!hpet_res) 999 return 1; 1000 1001 return insert_resource(&iomem_resource, hpet_res); 1002} 1003 1004late_initcall(hpet_insert_resource); 1005 1006#else 1007#define acpi_parse_hpet NULL 1008#endif 1009 1010static int __init acpi_parse_fadt(struct acpi_table_header *table) 1011{ 1012 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 1013 pr_debug("no legacy devices present\n"); 1014 x86_platform.legacy.devices.pnpbios = 0; 1015 } 1016 1017 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 1018 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 1019 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 1020 pr_debug("i8042 controller is absent\n"); 1021 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 1022 } 1023 1024 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 1025 pr_debug("not registering RTC platform device\n"); 1026 x86_platform.legacy.rtc = 0; 1027 } 1028 1029 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 1030 pr_debug("probing for VGA not safe\n"); 1031 x86_platform.legacy.no_vga = 1; 1032 } 1033 1034#ifdef CONFIG_X86_PM_TIMER 1035 /* detect the location of the ACPI PM Timer */ 1036 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 1037 /* FADT rev. 2 */ 1038 if (acpi_gbl_FADT.xpm_timer_block.space_id != 1039 ACPI_ADR_SPACE_SYSTEM_IO) 1040 return 0; 1041 1042 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1043 /* 1044 * "X" fields are optional extensions to the original V1.0 1045 * fields, so we must selectively expand V1.0 fields if the 1046 * corresponding X field is zero. 1047 */ 1048 if (!pmtmr_ioport) 1049 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1050 } else { 1051 /* FADT rev. 1 */ 1052 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1053 } 1054 if (pmtmr_ioport) 1055 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 1056#endif 1057 return 0; 1058} 1059 1060#ifdef CONFIG_X86_LOCAL_APIC 1061/* 1062 * Parse LAPIC entries in MADT 1063 * returns 0 on success, < 0 on error 1064 */ 1065 1066static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1067{ 1068 int count; 1069 1070 if (!boot_cpu_has(X86_FEATURE_APIC)) 1071 return -ENODEV; 1072 1073 /* 1074 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1075 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1076 */ 1077 1078 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1079 acpi_parse_lapic_addr_ovr, 0); 1080 if (count < 0) { 1081 pr_err("Error parsing LAPIC address override entry\n"); 1082 return count; 1083 } 1084 1085 register_lapic_address(acpi_lapic_addr); 1086 1087 return count; 1088} 1089 1090static int __init acpi_parse_madt_lapic_entries(void) 1091{ 1092 int count, x2count = 0; 1093 1094 if (!boot_cpu_has(X86_FEATURE_APIC)) 1095 return -ENODEV; 1096 1097 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1098 acpi_parse_sapic, MAX_LOCAL_APIC); 1099 1100 if (!count) { 1101 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 1102 acpi_parse_lapic, MAX_LOCAL_APIC); 1103 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 1104 acpi_parse_x2apic, MAX_LOCAL_APIC); 1105 } 1106 if (!count && !x2count) { 1107 pr_err("No LAPIC entries present\n"); 1108 /* TBD: Cleanup to allow fallback to MPS */ 1109 return -ENODEV; 1110 } else if (count < 0 || x2count < 0) { 1111 pr_err("Error parsing LAPIC entry\n"); 1112 /* TBD: Cleanup to allow fallback to MPS */ 1113 return count; 1114 } 1115 1116 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1117 acpi_parse_x2apic_nmi, 0); 1118 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1119 acpi_parse_lapic_nmi, 0); 1120 if (count < 0 || x2count < 0) { 1121 pr_err("Error parsing LAPIC NMI entry\n"); 1122 /* TBD: Cleanup to allow fallback to MPS */ 1123 return count; 1124 } 1125 return 0; 1126} 1127 1128#ifdef CONFIG_X86_64 1129static int __init acpi_parse_mp_wake(union acpi_subtable_headers *header, 1130 const unsigned long end) 1131{ 1132 struct acpi_madt_multiproc_wakeup *mp_wake; 1133 1134 if (!IS_ENABLED(CONFIG_SMP)) 1135 return -ENODEV; 1136 1137 mp_wake = (struct acpi_madt_multiproc_wakeup *)header; 1138 if (BAD_MADT_ENTRY(mp_wake, end)) 1139 return -EINVAL; 1140 1141 acpi_table_print_madt_entry(&header->common); 1142 1143 acpi_mp_wake_mailbox_paddr = mp_wake->base_address; 1144 1145 apic_update_callback(wakeup_secondary_cpu_64, acpi_wakeup_cpu); 1146 1147 return 0; 1148} 1149#endif /* CONFIG_X86_64 */ 1150#endif /* CONFIG_X86_LOCAL_APIC */ 1151 1152#ifdef CONFIG_X86_IO_APIC 1153static void __init mp_config_acpi_legacy_irqs(void) 1154{ 1155 int i; 1156 struct mpc_intsrc mp_irq; 1157 1158#ifdef CONFIG_EISA 1159 /* 1160 * Fabricate the legacy ISA bus (bus #31). 1161 */ 1162 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1163#endif 1164 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1165 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1166 1167 /* 1168 * Use the default configuration for the IRQs 0-15. Unless 1169 * overridden by (MADT) interrupt source override entries. 1170 */ 1171 for (i = 0; i < nr_legacy_irqs(); i++) { 1172 int ioapic, pin; 1173 unsigned int dstapic; 1174 int idx; 1175 u32 gsi; 1176 1177 /* Locate the gsi that irq i maps to. */ 1178 if (acpi_isa_irq_to_gsi(i, &gsi)) 1179 continue; 1180 1181 /* 1182 * Locate the IOAPIC that manages the ISA IRQ. 1183 */ 1184 ioapic = mp_find_ioapic(gsi); 1185 if (ioapic < 0) 1186 continue; 1187 pin = mp_find_ioapic_pin(ioapic, gsi); 1188 dstapic = mpc_ioapic_id(ioapic); 1189 1190 for (idx = 0; idx < mp_irq_entries; idx++) { 1191 struct mpc_intsrc *irq = mp_irqs + idx; 1192 1193 /* Do we already have a mapping for this ISA IRQ? */ 1194 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1195 break; 1196 1197 /* Do we already have a mapping for this IOAPIC pin */ 1198 if (irq->dstapic == dstapic && irq->dstirq == pin) 1199 break; 1200 } 1201 1202 if (idx != mp_irq_entries) { 1203 pr_debug("ACPI: IRQ%d used by override.\n", i); 1204 continue; /* IRQ already used */ 1205 } 1206 1207 mp_irq.type = MP_INTSRC; 1208 mp_irq.irqflag = 0; /* Conforming */ 1209 mp_irq.srcbus = MP_ISA_BUS; 1210 mp_irq.dstapic = dstapic; 1211 mp_irq.irqtype = mp_INT; 1212 mp_irq.srcbusirq = i; /* Identity mapped */ 1213 mp_irq.dstirq = pin; 1214 1215 mp_save_irq(&mp_irq); 1216 } 1217} 1218 1219/* 1220 * Parse IOAPIC related entries in MADT 1221 * returns 0 on success, < 0 on error 1222 */ 1223static int __init acpi_parse_madt_ioapic_entries(void) 1224{ 1225 int count; 1226 1227 /* 1228 * ACPI interpreter is required to complete interrupt setup, 1229 * so if it is off, don't enumerate the io-apics with ACPI. 1230 * If MPS is present, it will handle them, 1231 * otherwise the system will stay in PIC mode 1232 */ 1233 if (acpi_disabled || acpi_noirq) 1234 return -ENODEV; 1235 1236 if (!boot_cpu_has(X86_FEATURE_APIC)) 1237 return -ENODEV; 1238 1239 /* 1240 * if "noapic" boot option, don't look for IO-APICs 1241 */ 1242 if (ioapic_is_disabled) { 1243 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1244 return -ENODEV; 1245 } 1246 1247 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1248 MAX_IO_APICS); 1249 if (!count) { 1250 pr_err("No IOAPIC entries present\n"); 1251 return -ENODEV; 1252 } else if (count < 0) { 1253 pr_err("Error parsing IOAPIC entry\n"); 1254 return count; 1255 } 1256 1257 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1258 acpi_parse_int_src_ovr, nr_irqs); 1259 if (count < 0) { 1260 pr_err("Error parsing interrupt source overrides entry\n"); 1261 /* TBD: Cleanup to allow fallback to MPS */ 1262 return count; 1263 } 1264 1265 /* 1266 * If BIOS did not supply an INT_SRC_OVR for the SCI 1267 * pretend we got one so we can set the SCI flags. 1268 * But ignore setting up SCI on hardware reduced platforms. 1269 */ 1270 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1271 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1272 acpi_gbl_FADT.sci_interrupt); 1273 1274 /* Fill in identity legacy mappings where no override */ 1275 mp_config_acpi_legacy_irqs(); 1276 1277 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1278 acpi_parse_nmi_src, nr_irqs); 1279 if (count < 0) { 1280 pr_err("Error parsing NMI SRC entry\n"); 1281 /* TBD: Cleanup to allow fallback to MPS */ 1282 return count; 1283 } 1284 1285 return 0; 1286} 1287#else 1288static inline int acpi_parse_madt_ioapic_entries(void) 1289{ 1290 return -1; 1291} 1292#endif /* !CONFIG_X86_IO_APIC */ 1293 1294static void __init early_acpi_process_madt(void) 1295{ 1296#ifdef CONFIG_X86_LOCAL_APIC 1297 int error; 1298 1299 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1300 1301 /* 1302 * Parse MADT LAPIC entries 1303 */ 1304 error = early_acpi_parse_madt_lapic_addr_ovr(); 1305 if (!error) { 1306 acpi_lapic = 1; 1307 smp_found_config = 1; 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 } 1317#endif 1318} 1319 1320static void __init acpi_process_madt(void) 1321{ 1322#ifdef CONFIG_X86_LOCAL_APIC 1323 int error; 1324 1325 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1326 1327 /* 1328 * Parse MADT LAPIC entries 1329 */ 1330 error = acpi_parse_madt_lapic_entries(); 1331 if (!error) { 1332 acpi_lapic = 1; 1333 1334 /* 1335 * Parse MADT IO-APIC entries 1336 */ 1337 mutex_lock(&acpi_ioapic_lock); 1338 error = acpi_parse_madt_ioapic_entries(); 1339 mutex_unlock(&acpi_ioapic_lock); 1340 if (!error) { 1341 acpi_set_irq_model_ioapic(); 1342 1343 smp_found_config = 1; 1344 } 1345 1346#ifdef CONFIG_X86_64 1347 /* 1348 * Parse MADT MP Wake entry. 1349 */ 1350 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1351 acpi_parse_mp_wake, 1); 1352#endif 1353 } 1354 if (error == -EINVAL) { 1355 /* 1356 * Dell Precision Workstation 410, 610 come here. 1357 */ 1358 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1359 disable_acpi(); 1360 } 1361 } else { 1362 /* 1363 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1364 * In the event an MPS table was found, forget it. 1365 * Boot with "acpi=off" to use MPS on such a system. 1366 */ 1367 if (smp_found_config) { 1368 pr_warn("No APIC-table, disabling MPS\n"); 1369 smp_found_config = 0; 1370 } 1371 } 1372 1373 /* 1374 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1375 * processors, where MPS only supports physical. 1376 */ 1377 if (acpi_lapic && acpi_ioapic) 1378 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1379 else if (acpi_lapic) 1380 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1381#endif 1382 return; 1383} 1384 1385static int __init disable_acpi_irq(const struct dmi_system_id *d) 1386{ 1387 if (!acpi_force) { 1388 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1389 acpi_noirq_set(); 1390 } 1391 return 0; 1392} 1393 1394static int __init disable_acpi_pci(const struct dmi_system_id *d) 1395{ 1396 if (!acpi_force) { 1397 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1398 acpi_disable_pci(); 1399 } 1400 return 0; 1401} 1402 1403static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1404{ 1405 if (!acpi_force) { 1406 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1407 acpi_gbl_do_not_use_xsdt = TRUE; 1408 } else { 1409 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1410 } 1411 return 0; 1412} 1413 1414static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1415{ 1416 if (!acpi_force) { 1417 pr_notice("%s detected: acpi off\n", d->ident); 1418 disable_acpi(); 1419 } else { 1420 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1421 } 1422 return 0; 1423} 1424 1425/* 1426 * Force ignoring BIOS IRQ0 override 1427 */ 1428static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1429{ 1430 if (!acpi_skip_timer_override) { 1431 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1432 d->ident); 1433 acpi_skip_timer_override = 1; 1434 } 1435 return 0; 1436} 1437 1438/* 1439 * ACPI offers an alternative platform interface model that removes 1440 * ACPI hardware requirements for platforms that do not implement 1441 * the PC Architecture. 1442 * 1443 * We initialize the Hardware-reduced ACPI model here: 1444 */ 1445void __init acpi_generic_reduced_hw_init(void) 1446{ 1447 /* 1448 * Override x86_init functions and bypass legacy PIC in 1449 * hardware reduced ACPI mode. 1450 */ 1451 x86_init.timers.timer_init = x86_init_noop; 1452 x86_init.irqs.pre_vector_init = x86_init_noop; 1453 legacy_pic = &null_legacy_pic; 1454} 1455 1456static void __init acpi_reduced_hw_init(void) 1457{ 1458 if (acpi_gbl_reduced_hardware) 1459 x86_init.acpi.reduced_hw_early_init(); 1460} 1461 1462/* 1463 * If your system is blacklisted here, but you find that acpi=force 1464 * works for you, please contact linux-acpi@vger.kernel.org 1465 */ 1466static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1467 /* 1468 * Boxes that need ACPI disabled 1469 */ 1470 { 1471 .callback = dmi_disable_acpi, 1472 .ident = "IBM Thinkpad", 1473 .matches = { 1474 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1475 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1476 }, 1477 }, 1478 1479 /* 1480 * Boxes that need ACPI PCI IRQ routing disabled 1481 */ 1482 { 1483 .callback = disable_acpi_irq, 1484 .ident = "ASUS A7V", 1485 .matches = { 1486 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1487 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1488 /* newer BIOS, Revision 1011, does work */ 1489 DMI_MATCH(DMI_BIOS_VERSION, 1490 "ASUS A7V ACPI BIOS Revision 1007"), 1491 }, 1492 }, 1493 { 1494 /* 1495 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1496 * for LPC bridge, which is needed for the PCI 1497 * interrupt links to work. DSDT fix is in bug 5966. 1498 * 2645, 2646 model numbers are shared with 600/600E/600X 1499 */ 1500 .callback = disable_acpi_irq, 1501 .ident = "IBM Thinkpad 600 Series 2645", 1502 .matches = { 1503 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1504 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1505 }, 1506 }, 1507 { 1508 .callback = disable_acpi_irq, 1509 .ident = "IBM Thinkpad 600 Series 2646", 1510 .matches = { 1511 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1512 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1513 }, 1514 }, 1515 /* 1516 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1517 */ 1518 { /* _BBN 0 bug */ 1519 .callback = disable_acpi_pci, 1520 .ident = "ASUS PR-DLS", 1521 .matches = { 1522 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1523 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1524 DMI_MATCH(DMI_BIOS_VERSION, 1525 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1526 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1527 }, 1528 }, 1529 { 1530 .callback = disable_acpi_pci, 1531 .ident = "Acer TravelMate 36x Laptop", 1532 .matches = { 1533 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1534 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1535 }, 1536 }, 1537 /* 1538 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1539 */ 1540 { 1541 .callback = disable_acpi_xsdt, 1542 .ident = "Advantech DAC-BJ01", 1543 .matches = { 1544 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1545 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1546 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1547 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1548 }, 1549 }, 1550 {} 1551}; 1552 1553/* second table for DMI checks that should run after early-quirks */ 1554static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1555 /* 1556 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1557 * which includes some code which overrides all temperature 1558 * trip points to 16C if the INTIN2 input of the I/O APIC 1559 * is enabled. This input is incorrectly designated the 1560 * ISA IRQ 0 via an interrupt source override even though 1561 * it is wired to the output of the master 8259A and INTIN0 1562 * is not connected at all. Force ignoring BIOS IRQ0 1563 * override in that cases. 1564 */ 1565 { 1566 .callback = dmi_ignore_irq0_timer_override, 1567 .ident = "HP nx6115 laptop", 1568 .matches = { 1569 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1570 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1571 }, 1572 }, 1573 { 1574 .callback = dmi_ignore_irq0_timer_override, 1575 .ident = "HP NX6125 laptop", 1576 .matches = { 1577 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1578 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1579 }, 1580 }, 1581 { 1582 .callback = dmi_ignore_irq0_timer_override, 1583 .ident = "HP NX6325 laptop", 1584 .matches = { 1585 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1586 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1587 }, 1588 }, 1589 { 1590 .callback = dmi_ignore_irq0_timer_override, 1591 .ident = "HP 6715b laptop", 1592 .matches = { 1593 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1594 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1595 }, 1596 }, 1597 { 1598 .callback = dmi_ignore_irq0_timer_override, 1599 .ident = "FUJITSU SIEMENS", 1600 .matches = { 1601 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1602 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1603 }, 1604 }, 1605 {} 1606}; 1607 1608/* 1609 * acpi_boot_table_init() and acpi_boot_init() 1610 * called from setup_arch(), always. 1611 * 1. checksums all tables 1612 * 2. enumerates lapics 1613 * 3. enumerates io-apics 1614 * 1615 * acpi_table_init() is separate to allow reading SRAT without 1616 * other side effects. 1617 * 1618 * side effects of acpi_boot_init: 1619 * acpi_lapic = 1 if LAPIC found 1620 * acpi_ioapic = 1 if IOAPIC found 1621 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1622 * if acpi_blacklisted() acpi_disabled = 1; 1623 * acpi_irq_model=... 1624 * ... 1625 */ 1626 1627void __init acpi_boot_table_init(void) 1628{ 1629 dmi_check_system(acpi_dmi_table); 1630 1631 /* 1632 * If acpi_disabled, bail out 1633 */ 1634 if (acpi_disabled) 1635 return; 1636 1637 /* 1638 * Initialize the ACPI boot-time table parser. 1639 */ 1640 if (acpi_locate_initial_tables()) 1641 disable_acpi(); 1642 else 1643 acpi_reserve_initial_tables(); 1644} 1645 1646int __init early_acpi_boot_init(void) 1647{ 1648 if (acpi_disabled) 1649 return 1; 1650 1651 acpi_table_init_complete(); 1652 1653 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1654 1655 /* 1656 * blacklist may disable ACPI entirely 1657 */ 1658 if (acpi_blacklisted()) { 1659 if (acpi_force) { 1660 pr_warn("acpi=force override\n"); 1661 } else { 1662 pr_warn("Disabling ACPI support\n"); 1663 disable_acpi(); 1664 return 1; 1665 } 1666 } 1667 1668 /* 1669 * Process the Multiple APIC Description Table (MADT), if present 1670 */ 1671 early_acpi_process_madt(); 1672 1673 /* 1674 * Hardware-reduced ACPI mode initialization: 1675 */ 1676 acpi_reduced_hw_init(); 1677 1678 return 0; 1679} 1680 1681int __init acpi_boot_init(void) 1682{ 1683 /* those are executed after early-quirks are executed */ 1684 dmi_check_system(acpi_dmi_table_late); 1685 1686 /* 1687 * If acpi_disabled, bail out 1688 */ 1689 if (acpi_disabled) 1690 return 1; 1691 1692 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1693 1694 /* 1695 * set sci_int and PM timer address 1696 */ 1697 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1698 1699 /* 1700 * Process the Multiple APIC Description Table (MADT), if present 1701 */ 1702 acpi_process_madt(); 1703 1704 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1705 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1706 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1707 1708 if (!acpi_noirq) 1709 x86_init.pci.init = pci_acpi_init; 1710 1711 /* Do not enable ACPI SPCR console by default */ 1712 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1713 return 0; 1714} 1715 1716static int __init parse_acpi(char *arg) 1717{ 1718 if (!arg) 1719 return -EINVAL; 1720 1721 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1722 if (strcmp(arg, "off") == 0) { 1723 disable_acpi(); 1724 } 1725 /* acpi=force to over-ride black-list */ 1726 else if (strcmp(arg, "force") == 0) { 1727 acpi_force = 1; 1728 acpi_disabled = 0; 1729 } 1730 /* acpi=strict disables out-of-spec workarounds */ 1731 else if (strcmp(arg, "strict") == 0) { 1732 acpi_strict = 1; 1733 } 1734 /* acpi=rsdt use RSDT instead of XSDT */ 1735 else if (strcmp(arg, "rsdt") == 0) { 1736 acpi_gbl_do_not_use_xsdt = TRUE; 1737 } 1738 /* "acpi=noirq" disables ACPI interrupt routing */ 1739 else if (strcmp(arg, "noirq") == 0) { 1740 acpi_noirq_set(); 1741 } 1742 /* "acpi=copy_dsdt" copies DSDT */ 1743 else if (strcmp(arg, "copy_dsdt") == 0) { 1744 acpi_gbl_copy_dsdt_locally = 1; 1745 } 1746 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1747 else if (strcmp(arg, "nocmcff") == 0) { 1748 acpi_disable_cmcff = 1; 1749 } else { 1750 /* Core will printk when we return error. */ 1751 return -EINVAL; 1752 } 1753 return 0; 1754} 1755early_param("acpi", parse_acpi); 1756 1757static int __init parse_acpi_bgrt(char *arg) 1758{ 1759 acpi_nobgrt = true; 1760 return 0; 1761} 1762early_param("bgrt_disable", parse_acpi_bgrt); 1763 1764/* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1765static int __init parse_pci(char *arg) 1766{ 1767 if (arg && strcmp(arg, "noacpi") == 0) 1768 acpi_disable_pci(); 1769 return 0; 1770} 1771early_param("pci", parse_pci); 1772 1773int __init acpi_mps_check(void) 1774{ 1775#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1776/* mptable code is not built-in*/ 1777 if (acpi_disabled || acpi_noirq) { 1778 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1779 return 1; 1780 } 1781#endif 1782 return 0; 1783} 1784 1785#ifdef CONFIG_X86_IO_APIC 1786static int __init parse_acpi_skip_timer_override(char *arg) 1787{ 1788 acpi_skip_timer_override = 1; 1789 return 0; 1790} 1791early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1792 1793static int __init parse_acpi_use_timer_override(char *arg) 1794{ 1795 acpi_use_timer_override = 1; 1796 return 0; 1797} 1798early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1799#endif /* CONFIG_X86_IO_APIC */ 1800 1801static int __init setup_acpi_sci(char *s) 1802{ 1803 if (!s) 1804 return -EINVAL; 1805 if (!strcmp(s, "edge")) 1806 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1807 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1808 else if (!strcmp(s, "level")) 1809 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1810 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1811 else if (!strcmp(s, "high")) 1812 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1813 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1814 else if (!strcmp(s, "low")) 1815 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1816 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1817 else 1818 return -EINVAL; 1819 return 0; 1820} 1821early_param("acpi_sci", setup_acpi_sci); 1822 1823int __acpi_acquire_global_lock(unsigned int *lock) 1824{ 1825 unsigned int old, new, val; 1826 1827 old = READ_ONCE(*lock); 1828 do { 1829 val = (old >> 1) & 0x1; 1830 new = (old & ~0x3) + 2 + val; 1831 } while (!try_cmpxchg(lock, &old, new)); 1832 1833 if (val) 1834 return 0; 1835 1836 return -1; 1837} 1838 1839int __acpi_release_global_lock(unsigned int *lock) 1840{ 1841 unsigned int old, new; 1842 1843 old = READ_ONCE(*lock); 1844 do { 1845 new = old & ~0x3; 1846 } while (!try_cmpxchg(lock, &old, new)); 1847 return old & 0x1; 1848} 1849 1850void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1851{ 1852 e820__range_add(addr, size, E820_TYPE_NVS); 1853 e820__update_table_print(); 1854} 1855 1856void x86_default_set_root_pointer(u64 addr) 1857{ 1858 boot_params.acpi_rsdp_addr = addr; 1859} 1860 1861u64 x86_default_get_root_pointer(void) 1862{ 1863 return boot_params.acpi_rsdp_addr; 1864} 1865