1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 4 * 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 7 */ 8 #define pr_fmt(fmt) "ACPI: " fmt 9 10 #include <linux/init.h> 11 #include <linux/acpi.h> 12 #include <linux/acpi_pmtmr.h> 13 #include <linux/efi.h> 14 #include <linux/cpumask.h> 15 #include <linux/export.h> 16 #include <linux/dmi.h> 17 #include <linux/irq.h> 18 #include <linux/slab.h> 19 #include <linux/memblock.h> 20 #include <linux/ioport.h> 21 #include <linux/pci.h> 22 #include <linux/efi-bgrt.h> 23 #include <linux/serial_core.h> 24 #include <linux/pgtable.h> 25 26 #include <asm/e820/api.h> 27 #include <asm/irqdomain.h> 28 #include <asm/pci_x86.h> 29 #include <asm/io_apic.h> 30 #include <asm/apic.h> 31 #include <asm/io.h> 32 #include <asm/mpspec.h> 33 #include <asm/smp.h> 34 #include <asm/i8259.h> 35 #include <asm/setup.h> 36 37 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 38 static int __initdata acpi_force = 0; 39 int acpi_disabled; 40 EXPORT_SYMBOL(acpi_disabled); 41 42 #ifdef CONFIG_X86_64 43 # include <asm/proto.h> 44 #endif /* X86 */ 45 46 int acpi_noirq; /* skip ACPI IRQ initialization */ 47 static int acpi_nobgrt; /* skip ACPI BGRT */ 48 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 49 EXPORT_SYMBOL(acpi_pci_disabled); 50 51 int acpi_lapic; 52 int acpi_ioapic; 53 int acpi_strict; 54 int acpi_disable_cmcff; 55 bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 56 57 /* ACPI SCI override configuration */ 58 u8 acpi_sci_flags __initdata; 59 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 60 int acpi_skip_timer_override __initdata; 61 int acpi_use_timer_override __initdata; 62 int acpi_fix_pin2_polarity __initdata; 63 64 #ifdef CONFIG_X86_LOCAL_APIC 65 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 66 static bool acpi_support_online_capable; 67 #endif 68 69 #ifdef CONFIG_X86_64 70 /* Physical address of the Multiprocessor Wakeup Structure mailbox */ 71 static u64 acpi_mp_wake_mailbox_paddr; 72 /* Virtual address of the Multiprocessor Wakeup Structure mailbox */ 73 static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox; 74 #endif 75 76 #ifdef CONFIG_X86_IO_APIC 77 /* 78 * Locks related to IOAPIC hotplug 79 * Hotplug side: 80 * ->device_hotplug_lock 81 * ->acpi_ioapic_lock 82 * ->ioapic_lock 83 * Interrupt mapping side: 84 * ->acpi_ioapic_lock 85 * ->ioapic_mutex 86 * ->ioapic_lock 87 */ 88 static DEFINE_MUTEX(acpi_ioapic_lock); 89 #endif 90 91 /* -------------------------------------------------------------------------- 92 Boot-time Configuration 93 -------------------------------------------------------------------------- */ 94 95 /* 96 * The default interrupt routing model is PIC (8259). This gets 97 * overridden if IOAPICs are enumerated (below). 98 */ 99 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 100 101 102 /* 103 * ISA irqs by default are the first 16 gsis but can be 104 * any gsi as specified by an interrupt source override. 105 */ 106 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 107 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 108 }; 109 110 /* 111 * This is just a simple wrapper around early_memremap(), 112 * with sanity checks for phys == 0 and size == 0. 113 */ 114 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 115 { 116 117 if (!phys || !size) 118 return NULL; 119 120 return early_memremap(phys, size); 121 } 122 123 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 124 { 125 if (!map || !size) 126 return; 127 128 early_memunmap(map, size); 129 } 130 131 #ifdef CONFIG_X86_LOCAL_APIC 132 static int __init acpi_parse_madt(struct acpi_table_header *table) 133 { 134 struct acpi_table_madt *madt = NULL; 135 136 if (!boot_cpu_has(X86_FEATURE_APIC)) 137 return -EINVAL; 138 139 madt = (struct acpi_table_madt *)table; 140 if (!madt) { 141 pr_warn("Unable to map MADT\n"); 142 return -ENODEV; 143 } 144 145 if (madt->address) { 146 acpi_lapic_addr = (u64) madt->address; 147 148 pr_debug("Local APIC address 0x%08x\n", madt->address); 149 } 150 151 /* ACPI 6.3 and newer support the online capable bit. */ 152 if (acpi_gbl_FADT.header.revision > 6 || 153 (acpi_gbl_FADT.header.revision == 6 && 154 acpi_gbl_FADT.minor_revision >= 3)) 155 acpi_support_online_capable = true; 156 157 default_acpi_madt_oem_check(madt->header.oem_id, 158 madt->header.oem_table_id); 159 160 return 0; 161 } 162 163 /** 164 * acpi_register_lapic - register a local apic and generates a logic cpu number 165 * @id: local apic id to register 166 * @acpiid: ACPI id to register 167 * @enabled: this cpu is enabled or not 168 * 169 * Returns the logic cpu number which maps to the local apic 170 */ 171 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 172 { 173 int cpu; 174 175 if (id >= MAX_LOCAL_APIC) { 176 pr_info("skipped apicid that is too big\n"); 177 return -EINVAL; 178 } 179 180 if (!enabled) { 181 ++disabled_cpus; 182 return -EINVAL; 183 } 184 185 cpu = generic_processor_info(id); 186 if (cpu >= 0) 187 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 188 189 return cpu; 190 } 191 192 static bool __init acpi_is_processor_usable(u32 lapic_flags) 193 { 194 if (lapic_flags & ACPI_MADT_ENABLED) 195 return true; 196 197 if (!acpi_support_online_capable || 198 (lapic_flags & ACPI_MADT_ONLINE_CAPABLE)) 199 return true; 200 201 return false; 202 } 203 204 static int __init 205 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 206 { 207 struct acpi_madt_local_x2apic *processor = NULL; 208 #ifdef CONFIG_X86_X2APIC 209 u32 apic_id; 210 u8 enabled; 211 #endif 212 213 processor = (struct acpi_madt_local_x2apic *)header; 214 215 if (BAD_MADT_ENTRY(processor, end)) 216 return -EINVAL; 217 218 acpi_table_print_madt_entry(&header->common); 219 220 #ifdef CONFIG_X86_X2APIC 221 apic_id = processor->local_apic_id; 222 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 223 224 /* Ignore invalid ID */ 225 if (apic_id == 0xffffffff) 226 return 0; 227 228 /* don't register processors that cannot be onlined */ 229 if (!acpi_is_processor_usable(processor->lapic_flags)) 230 return 0; 231 232 /* 233 * We need to register disabled CPU as well to permit 234 * counting disabled CPUs. This allows us to size 235 * cpus_possible_map more accurately, to permit 236 * to not preallocating memory for all NR_CPUS 237 * when we use CPU hotplug. 238 */ 239 if (!apic_id_valid(apic_id)) { 240 if (enabled) 241 pr_warn("x2apic entry ignored\n"); 242 return 0; 243 } 244 245 acpi_register_lapic(apic_id, processor->uid, enabled); 246 #else 247 pr_warn("x2apic entry ignored\n"); 248 #endif 249 250 return 0; 251 } 252 253 static int __init 254 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 255 { 256 struct acpi_madt_local_apic *processor = NULL; 257 258 processor = (struct acpi_madt_local_apic *)header; 259 260 if (BAD_MADT_ENTRY(processor, end)) 261 return -EINVAL; 262 263 acpi_table_print_madt_entry(&header->common); 264 265 /* Ignore invalid ID */ 266 if (processor->id == 0xff) 267 return 0; 268 269 /* don't register processors that can not be onlined */ 270 if (!acpi_is_processor_usable(processor->lapic_flags)) 271 return 0; 272 273 /* 274 * We need to register disabled CPU as well to permit 275 * counting disabled CPUs. This allows us to size 276 * cpus_possible_map more accurately, to permit 277 * to not preallocating memory for all NR_CPUS 278 * when we use CPU hotplug. 279 */ 280 acpi_register_lapic(processor->id, /* APIC ID */ 281 processor->processor_id, /* ACPI ID */ 282 processor->lapic_flags & ACPI_MADT_ENABLED); 283 284 return 0; 285 } 286 287 static int __init 288 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 289 { 290 struct acpi_madt_local_sapic *processor = NULL; 291 292 processor = (struct acpi_madt_local_sapic *)header; 293 294 if (BAD_MADT_ENTRY(processor, end)) 295 return -EINVAL; 296 297 acpi_table_print_madt_entry(&header->common); 298 299 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 300 processor->processor_id, /* ACPI ID */ 301 processor->lapic_flags & ACPI_MADT_ENABLED); 302 303 return 0; 304 } 305 306 static int __init 307 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 308 const unsigned long end) 309 { 310 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 311 312 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 313 314 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 315 return -EINVAL; 316 317 acpi_table_print_madt_entry(&header->common); 318 319 acpi_lapic_addr = lapic_addr_ovr->address; 320 321 return 0; 322 } 323 324 static int __init 325 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 326 const unsigned long end) 327 { 328 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 329 330 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 331 332 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 333 return -EINVAL; 334 335 acpi_table_print_madt_entry(&header->common); 336 337 if (x2apic_nmi->lint != 1) 338 pr_warn("NMI not connected to LINT 1!\n"); 339 340 return 0; 341 } 342 343 static int __init 344 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 345 { 346 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 347 348 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 349 350 if (BAD_MADT_ENTRY(lapic_nmi, end)) 351 return -EINVAL; 352 353 acpi_table_print_madt_entry(&header->common); 354 355 if (lapic_nmi->lint != 1) 356 pr_warn("NMI not connected to LINT 1!\n"); 357 358 return 0; 359 } 360 361 #ifdef CONFIG_X86_64 362 static int acpi_wakeup_cpu(int apicid, unsigned long start_ip) 363 { 364 /* 365 * Remap mailbox memory only for the first call to acpi_wakeup_cpu(). 366 * 367 * Wakeup of secondary CPUs is fully serialized in the core code. 368 * No need to protect acpi_mp_wake_mailbox from concurrent accesses. 369 */ 370 if (!acpi_mp_wake_mailbox) { 371 acpi_mp_wake_mailbox = memremap(acpi_mp_wake_mailbox_paddr, 372 sizeof(*acpi_mp_wake_mailbox), 373 MEMREMAP_WB); 374 } 375 376 /* 377 * Mailbox memory is shared between the firmware and OS. Firmware will 378 * listen on mailbox command address, and once it receives the wakeup 379 * command, the CPU associated with the given apicid will be booted. 380 * 381 * The value of 'apic_id' and 'wakeup_vector' must be visible to the 382 * firmware before the wakeup command is visible. smp_store_release() 383 * ensures ordering and visibility. 384 */ 385 acpi_mp_wake_mailbox->apic_id = apicid; 386 acpi_mp_wake_mailbox->wakeup_vector = start_ip; 387 smp_store_release(&acpi_mp_wake_mailbox->command, 388 ACPI_MP_WAKE_COMMAND_WAKEUP); 389 390 /* 391 * Wait for the CPU to wake up. 392 * 393 * The CPU being woken up is essentially in a spin loop waiting to be 394 * woken up. It should not take long for it wake up and acknowledge by 395 * zeroing out ->command. 396 * 397 * ACPI specification doesn't provide any guidance on how long kernel 398 * has to wait for a wake up acknowledgement. It also doesn't provide 399 * a way to cancel a wake up request if it takes too long. 400 * 401 * In TDX environment, the VMM has control over how long it takes to 402 * wake up secondary. It can postpone scheduling secondary vCPU 403 * indefinitely. Giving up on wake up request and reporting error opens 404 * possible attack vector for VMM: it can wake up a secondary CPU when 405 * kernel doesn't expect it. Wait until positive result of the wake up 406 * request. 407 */ 408 while (READ_ONCE(acpi_mp_wake_mailbox->command)) 409 cpu_relax(); 410 411 return 0; 412 } 413 #endif /* CONFIG_X86_64 */ 414 #endif /* CONFIG_X86_LOCAL_APIC */ 415 416 #ifdef CONFIG_X86_IO_APIC 417 #define MP_ISA_BUS 0 418 419 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 420 u8 trigger, u32 gsi); 421 422 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 423 u32 gsi) 424 { 425 /* 426 * Check bus_irq boundary. 427 */ 428 if (bus_irq >= NR_IRQS_LEGACY) { 429 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 430 return; 431 } 432 433 /* 434 * TBD: This check is for faulty timer entries, where the override 435 * erroneously sets the trigger to level, resulting in a HUGE 436 * increase of timer interrupts! 437 */ 438 if ((bus_irq == 0) && (trigger == 3)) 439 trigger = 1; 440 441 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 442 return; 443 /* 444 * Reset default identity mapping if gsi is also an legacy IRQ, 445 * otherwise there will be more than one entry with the same GSI 446 * and acpi_isa_irq_to_gsi() may give wrong result. 447 */ 448 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 449 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 450 isa_irq_to_gsi[bus_irq] = gsi; 451 } 452 453 static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 454 int polarity) 455 { 456 #ifdef CONFIG_X86_MPPARSE 457 struct mpc_intsrc mp_irq; 458 struct pci_dev *pdev; 459 unsigned char number; 460 unsigned int devfn; 461 int ioapic; 462 u8 pin; 463 464 if (!acpi_ioapic) 465 return; 466 if (!dev || !dev_is_pci(dev)) 467 return; 468 469 pdev = to_pci_dev(dev); 470 number = pdev->bus->number; 471 devfn = pdev->devfn; 472 pin = pdev->pin; 473 /* print the entry should happen on mptable identically */ 474 mp_irq.type = MP_INTSRC; 475 mp_irq.irqtype = mp_INT; 476 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 477 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 478 mp_irq.srcbus = number; 479 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 480 ioapic = mp_find_ioapic(gsi); 481 mp_irq.dstapic = mpc_ioapic_id(ioapic); 482 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 483 484 mp_save_irq(&mp_irq); 485 #endif 486 } 487 488 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 489 u8 trigger, u32 gsi) 490 { 491 struct mpc_intsrc mp_irq; 492 int ioapic, pin; 493 494 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 495 ioapic = mp_find_ioapic(gsi); 496 if (ioapic < 0) { 497 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 498 return ioapic; 499 } 500 501 pin = mp_find_ioapic_pin(ioapic, gsi); 502 503 mp_irq.type = MP_INTSRC; 504 mp_irq.irqtype = mp_INT; 505 mp_irq.irqflag = (trigger << 2) | polarity; 506 mp_irq.srcbus = MP_ISA_BUS; 507 mp_irq.srcbusirq = bus_irq; 508 mp_irq.dstapic = mpc_ioapic_id(ioapic); 509 mp_irq.dstirq = pin; 510 511 mp_save_irq(&mp_irq); 512 513 return 0; 514 } 515 516 static int __init 517 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 518 { 519 struct acpi_madt_io_apic *ioapic = NULL; 520 struct ioapic_domain_cfg cfg = { 521 .type = IOAPIC_DOMAIN_DYNAMIC, 522 .ops = &mp_ioapic_irqdomain_ops, 523 }; 524 525 ioapic = (struct acpi_madt_io_apic *)header; 526 527 if (BAD_MADT_ENTRY(ioapic, end)) 528 return -EINVAL; 529 530 acpi_table_print_madt_entry(&header->common); 531 532 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 533 if (ioapic->global_irq_base < nr_legacy_irqs()) 534 cfg.type = IOAPIC_DOMAIN_LEGACY; 535 536 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 537 &cfg); 538 539 return 0; 540 } 541 542 /* 543 * Parse Interrupt Source Override for the ACPI SCI 544 */ 545 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 546 { 547 if (trigger == 0) /* compatible SCI trigger is level */ 548 trigger = 3; 549 550 if (polarity == 0) /* compatible SCI polarity is low */ 551 polarity = 3; 552 553 /* Command-line over-ride via acpi_sci= */ 554 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 555 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 556 557 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 558 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 559 560 if (bus_irq < NR_IRQS_LEGACY) 561 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 562 else 563 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 564 565 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 566 567 /* 568 * stash over-ride to indicate we've been here 569 * and for later update of acpi_gbl_FADT 570 */ 571 acpi_sci_override_gsi = gsi; 572 return; 573 } 574 575 static int __init 576 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 577 const unsigned long end) 578 { 579 struct acpi_madt_interrupt_override *intsrc = NULL; 580 581 intsrc = (struct acpi_madt_interrupt_override *)header; 582 583 if (BAD_MADT_ENTRY(intsrc, end)) 584 return -EINVAL; 585 586 acpi_table_print_madt_entry(&header->common); 587 588 if (intsrc->source_irq < NR_IRQS_LEGACY) 589 acpi_int_src_ovr[intsrc->source_irq] = true; 590 591 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 592 acpi_sci_ioapic_setup(intsrc->source_irq, 593 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 594 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 595 intsrc->global_irq); 596 return 0; 597 } 598 599 if (intsrc->source_irq == 0) { 600 if (acpi_skip_timer_override) { 601 pr_warn("BIOS IRQ0 override ignored.\n"); 602 return 0; 603 } 604 605 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 606 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 607 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 608 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 609 } 610 } 611 612 mp_override_legacy_irq(intsrc->source_irq, 613 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 614 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 615 intsrc->global_irq); 616 617 return 0; 618 } 619 620 static int __init 621 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 622 { 623 struct acpi_madt_nmi_source *nmi_src = NULL; 624 625 nmi_src = (struct acpi_madt_nmi_source *)header; 626 627 if (BAD_MADT_ENTRY(nmi_src, end)) 628 return -EINVAL; 629 630 acpi_table_print_madt_entry(&header->common); 631 632 /* TBD: Support nimsrc entries? */ 633 634 return 0; 635 } 636 637 #endif /* CONFIG_X86_IO_APIC */ 638 639 /* 640 * acpi_pic_sci_set_trigger() 641 * 642 * use ELCR to set PIC-mode trigger type for SCI 643 * 644 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 645 * it may require Edge Trigger -- use "acpi_sci=edge" 646 * 647 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 648 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 649 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 650 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 651 */ 652 653 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 654 { 655 unsigned int mask = 1 << irq; 656 unsigned int old, new; 657 658 /* Real old ELCR mask */ 659 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 660 661 /* 662 * If we use ACPI to set PCI IRQs, then we should clear ELCR 663 * since we will set it correctly as we enable the PCI irq 664 * routing. 665 */ 666 new = acpi_noirq ? old : 0; 667 668 /* 669 * Update SCI information in the ELCR, it isn't in the PCI 670 * routing tables.. 671 */ 672 switch (trigger) { 673 case 1: /* Edge - clear */ 674 new &= ~mask; 675 break; 676 case 3: /* Level - set */ 677 new |= mask; 678 break; 679 } 680 681 if (old == new) 682 return; 683 684 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 685 outb(new, PIC_ELCR1); 686 outb(new >> 8, PIC_ELCR2); 687 } 688 689 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 690 { 691 int rc, irq, trigger, polarity; 692 693 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 694 *irqp = gsi; 695 return 0; 696 } 697 698 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 699 if (rc) 700 return rc; 701 702 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 703 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 704 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 705 if (irq < 0) 706 return irq; 707 708 *irqp = irq; 709 return 0; 710 } 711 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 712 713 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 714 { 715 if (isa_irq < nr_legacy_irqs() && 716 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 717 *gsi = isa_irq_to_gsi[isa_irq]; 718 return 0; 719 } 720 721 return -1; 722 } 723 724 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 725 int trigger, int polarity) 726 { 727 #ifdef CONFIG_PCI 728 /* 729 * Make sure all (legacy) PCI IRQs are set as level-triggered. 730 */ 731 if (trigger == ACPI_LEVEL_SENSITIVE) 732 elcr_set_level_irq(gsi); 733 #endif 734 735 return gsi; 736 } 737 738 #ifdef CONFIG_X86_LOCAL_APIC 739 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 740 int trigger, int polarity) 741 { 742 int irq = gsi; 743 #ifdef CONFIG_X86_IO_APIC 744 int node; 745 struct irq_alloc_info info; 746 747 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 748 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 749 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 750 ioapic_set_alloc_attr(&info, node, trigger, polarity); 751 752 mutex_lock(&acpi_ioapic_lock); 753 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 754 /* Don't set up the ACPI SCI because it's already set up */ 755 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 756 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 757 mutex_unlock(&acpi_ioapic_lock); 758 #endif 759 760 return irq; 761 } 762 763 static void acpi_unregister_gsi_ioapic(u32 gsi) 764 { 765 #ifdef CONFIG_X86_IO_APIC 766 int irq; 767 768 mutex_lock(&acpi_ioapic_lock); 769 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 770 if (irq > 0) 771 mp_unmap_irq(irq); 772 mutex_unlock(&acpi_ioapic_lock); 773 #endif 774 } 775 #endif 776 777 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 778 int trigger, int polarity) = acpi_register_gsi_pic; 779 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 780 781 #ifdef CONFIG_ACPI_SLEEP 782 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 783 #else 784 int (*acpi_suspend_lowlevel)(void); 785 #endif 786 787 /* 788 * success: return IRQ number (>=0) 789 * failure: return < 0 790 */ 791 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 792 { 793 return __acpi_register_gsi(dev, gsi, trigger, polarity); 794 } 795 EXPORT_SYMBOL_GPL(acpi_register_gsi); 796 797 void acpi_unregister_gsi(u32 gsi) 798 { 799 if (__acpi_unregister_gsi) 800 __acpi_unregister_gsi(gsi); 801 } 802 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 803 804 #ifdef CONFIG_X86_LOCAL_APIC 805 static void __init acpi_set_irq_model_ioapic(void) 806 { 807 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 808 __acpi_register_gsi = acpi_register_gsi_ioapic; 809 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 810 acpi_ioapic = 1; 811 } 812 #endif 813 814 /* 815 * ACPI based hotplug support for CPU 816 */ 817 #ifdef CONFIG_ACPI_HOTPLUG_CPU 818 #include <acpi/processor.h> 819 820 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 821 { 822 #ifdef CONFIG_ACPI_NUMA 823 int nid; 824 825 nid = acpi_get_node(handle); 826 if (nid != NUMA_NO_NODE) { 827 set_apicid_to_node(physid, nid); 828 numa_set_node(cpu, nid); 829 } 830 #endif 831 return 0; 832 } 833 834 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 835 int *pcpu) 836 { 837 int cpu; 838 839 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 840 if (cpu < 0) { 841 pr_info("Unable to map lapic to logical cpu number\n"); 842 return cpu; 843 } 844 845 acpi_processor_set_pdc(handle); 846 acpi_map_cpu2node(handle, cpu, physid); 847 848 *pcpu = cpu; 849 return 0; 850 } 851 EXPORT_SYMBOL(acpi_map_cpu); 852 853 int acpi_unmap_cpu(int cpu) 854 { 855 #ifdef CONFIG_ACPI_NUMA 856 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 857 #endif 858 859 per_cpu(x86_cpu_to_apicid, cpu) = -1; 860 set_cpu_present(cpu, false); 861 num_processors--; 862 863 return (0); 864 } 865 EXPORT_SYMBOL(acpi_unmap_cpu); 866 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 867 868 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 869 { 870 int ret = -ENOSYS; 871 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 872 int ioapic_id; 873 u64 addr; 874 struct ioapic_domain_cfg cfg = { 875 .type = IOAPIC_DOMAIN_DYNAMIC, 876 .ops = &mp_ioapic_irqdomain_ops, 877 }; 878 879 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 880 if (ioapic_id < 0) { 881 unsigned long long uid; 882 acpi_status status; 883 884 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 885 NULL, &uid); 886 if (ACPI_FAILURE(status)) { 887 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 888 return -EINVAL; 889 } 890 ioapic_id = (int)uid; 891 } 892 893 mutex_lock(&acpi_ioapic_lock); 894 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 895 mutex_unlock(&acpi_ioapic_lock); 896 #endif 897 898 return ret; 899 } 900 EXPORT_SYMBOL(acpi_register_ioapic); 901 902 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 903 { 904 int ret = -ENOSYS; 905 906 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 907 mutex_lock(&acpi_ioapic_lock); 908 ret = mp_unregister_ioapic(gsi_base); 909 mutex_unlock(&acpi_ioapic_lock); 910 #endif 911 912 return ret; 913 } 914 EXPORT_SYMBOL(acpi_unregister_ioapic); 915 916 /** 917 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 918 * has been registered 919 * @handle: ACPI handle of the IOAPIC device 920 * @gsi_base: GSI base associated with the IOAPIC 921 * 922 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 923 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 924 */ 925 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 926 { 927 int ret = 0; 928 929 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 930 mutex_lock(&acpi_ioapic_lock); 931 ret = mp_ioapic_registered(gsi_base); 932 mutex_unlock(&acpi_ioapic_lock); 933 #endif 934 935 return ret; 936 } 937 938 static int __init acpi_parse_sbf(struct acpi_table_header *table) 939 { 940 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 941 942 sbf_port = sb->cmos_index; /* Save CMOS port */ 943 944 return 0; 945 } 946 947 #ifdef CONFIG_HPET_TIMER 948 #include <asm/hpet.h> 949 950 static struct resource *hpet_res __initdata; 951 952 static int __init acpi_parse_hpet(struct acpi_table_header *table) 953 { 954 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 955 956 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 957 pr_warn("HPET timers must be located in memory.\n"); 958 return -1; 959 } 960 961 hpet_address = hpet_tbl->address.address; 962 hpet_blockid = hpet_tbl->sequence; 963 964 /* 965 * Some broken BIOSes advertise HPET at 0x0. We really do not 966 * want to allocate a resource there. 967 */ 968 if (!hpet_address) { 969 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 970 return 0; 971 } 972 #ifdef CONFIG_X86_64 973 /* 974 * Some even more broken BIOSes advertise HPET at 975 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 976 * some noise: 977 */ 978 if (hpet_address == 0xfed0000000000000UL) { 979 if (!hpet_force_user) { 980 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 981 hpet_tbl->id); 982 hpet_address = 0; 983 return 0; 984 } 985 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 986 hpet_tbl->id); 987 hpet_address >>= 32; 988 } 989 #endif 990 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 991 992 /* 993 * Allocate and initialize the HPET firmware resource for adding into 994 * the resource tree during the lateinit timeframe. 995 */ 996 #define HPET_RESOURCE_NAME_SIZE 9 997 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 998 SMP_CACHE_BYTES); 999 if (!hpet_res) 1000 panic("%s: Failed to allocate %zu bytes\n", __func__, 1001 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 1002 1003 hpet_res->name = (void *)&hpet_res[1]; 1004 hpet_res->flags = IORESOURCE_MEM; 1005 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 1006 hpet_tbl->sequence); 1007 1008 hpet_res->start = hpet_address; 1009 hpet_res->end = hpet_address + (1 * 1024) - 1; 1010 1011 return 0; 1012 } 1013 1014 /* 1015 * hpet_insert_resource inserts the HPET resources used into the resource 1016 * tree. 1017 */ 1018 static __init int hpet_insert_resource(void) 1019 { 1020 if (!hpet_res) 1021 return 1; 1022 1023 return insert_resource(&iomem_resource, hpet_res); 1024 } 1025 1026 late_initcall(hpet_insert_resource); 1027 1028 #else 1029 #define acpi_parse_hpet NULL 1030 #endif 1031 1032 static int __init acpi_parse_fadt(struct acpi_table_header *table) 1033 { 1034 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 1035 pr_debug("no legacy devices present\n"); 1036 x86_platform.legacy.devices.pnpbios = 0; 1037 } 1038 1039 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 1040 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 1041 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 1042 pr_debug("i8042 controller is absent\n"); 1043 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 1044 } 1045 1046 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 1047 pr_debug("not registering RTC platform device\n"); 1048 x86_platform.legacy.rtc = 0; 1049 } 1050 1051 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 1052 pr_debug("probing for VGA not safe\n"); 1053 x86_platform.legacy.no_vga = 1; 1054 } 1055 1056 #ifdef CONFIG_X86_PM_TIMER 1057 /* detect the location of the ACPI PM Timer */ 1058 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 1059 /* FADT rev. 2 */ 1060 if (acpi_gbl_FADT.xpm_timer_block.space_id != 1061 ACPI_ADR_SPACE_SYSTEM_IO) 1062 return 0; 1063 1064 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1065 /* 1066 * "X" fields are optional extensions to the original V1.0 1067 * fields, so we must selectively expand V1.0 fields if the 1068 * corresponding X field is zero. 1069 */ 1070 if (!pmtmr_ioport) 1071 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1072 } else { 1073 /* FADT rev. 1 */ 1074 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1075 } 1076 if (pmtmr_ioport) 1077 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 1078 #endif 1079 return 0; 1080 } 1081 1082 #ifdef CONFIG_X86_LOCAL_APIC 1083 /* 1084 * Parse LAPIC entries in MADT 1085 * returns 0 on success, < 0 on error 1086 */ 1087 1088 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1089 { 1090 int count; 1091 1092 if (!boot_cpu_has(X86_FEATURE_APIC)) 1093 return -ENODEV; 1094 1095 /* 1096 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1097 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1098 */ 1099 1100 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1101 acpi_parse_lapic_addr_ovr, 0); 1102 if (count < 0) { 1103 pr_err("Error parsing LAPIC address override entry\n"); 1104 return count; 1105 } 1106 1107 register_lapic_address(acpi_lapic_addr); 1108 1109 return count; 1110 } 1111 1112 static int __init acpi_parse_madt_lapic_entries(void) 1113 { 1114 int count; 1115 int x2count = 0; 1116 int ret; 1117 struct acpi_subtable_proc madt_proc[2]; 1118 1119 if (!boot_cpu_has(X86_FEATURE_APIC)) 1120 return -ENODEV; 1121 1122 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1123 acpi_parse_sapic, MAX_LOCAL_APIC); 1124 1125 if (!count) { 1126 memset(madt_proc, 0, sizeof(madt_proc)); 1127 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1128 madt_proc[0].handler = acpi_parse_lapic; 1129 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1130 madt_proc[1].handler = acpi_parse_x2apic; 1131 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1132 sizeof(struct acpi_table_madt), 1133 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1134 if (ret < 0) { 1135 pr_err("Error parsing LAPIC/X2APIC entries\n"); 1136 return ret; 1137 } 1138 1139 count = madt_proc[0].count; 1140 x2count = madt_proc[1].count; 1141 } 1142 if (!count && !x2count) { 1143 pr_err("No LAPIC entries present\n"); 1144 /* TBD: Cleanup to allow fallback to MPS */ 1145 return -ENODEV; 1146 } else if (count < 0 || x2count < 0) { 1147 pr_err("Error parsing LAPIC entry\n"); 1148 /* TBD: Cleanup to allow fallback to MPS */ 1149 return count; 1150 } 1151 1152 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1153 acpi_parse_x2apic_nmi, 0); 1154 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1155 acpi_parse_lapic_nmi, 0); 1156 if (count < 0 || x2count < 0) { 1157 pr_err("Error parsing LAPIC NMI entry\n"); 1158 /* TBD: Cleanup to allow fallback to MPS */ 1159 return count; 1160 } 1161 return 0; 1162 } 1163 1164 #ifdef CONFIG_X86_64 1165 static int __init acpi_parse_mp_wake(union acpi_subtable_headers *header, 1166 const unsigned long end) 1167 { 1168 struct acpi_madt_multiproc_wakeup *mp_wake; 1169 1170 if (!IS_ENABLED(CONFIG_SMP)) 1171 return -ENODEV; 1172 1173 mp_wake = (struct acpi_madt_multiproc_wakeup *)header; 1174 if (BAD_MADT_ENTRY(mp_wake, end)) 1175 return -EINVAL; 1176 1177 acpi_table_print_madt_entry(&header->common); 1178 1179 acpi_mp_wake_mailbox_paddr = mp_wake->base_address; 1180 1181 apic_update_callback(wakeup_secondary_cpu_64, acpi_wakeup_cpu); 1182 1183 return 0; 1184 } 1185 #endif /* CONFIG_X86_64 */ 1186 #endif /* CONFIG_X86_LOCAL_APIC */ 1187 1188 #ifdef CONFIG_X86_IO_APIC 1189 static void __init mp_config_acpi_legacy_irqs(void) 1190 { 1191 int i; 1192 struct mpc_intsrc mp_irq; 1193 1194 #ifdef CONFIG_EISA 1195 /* 1196 * Fabricate the legacy ISA bus (bus #31). 1197 */ 1198 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1199 #endif 1200 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1201 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1202 1203 /* 1204 * Use the default configuration for the IRQs 0-15. Unless 1205 * overridden by (MADT) interrupt source override entries. 1206 */ 1207 for (i = 0; i < nr_legacy_irqs(); i++) { 1208 int ioapic, pin; 1209 unsigned int dstapic; 1210 int idx; 1211 u32 gsi; 1212 1213 /* Locate the gsi that irq i maps to. */ 1214 if (acpi_isa_irq_to_gsi(i, &gsi)) 1215 continue; 1216 1217 /* 1218 * Locate the IOAPIC that manages the ISA IRQ. 1219 */ 1220 ioapic = mp_find_ioapic(gsi); 1221 if (ioapic < 0) 1222 continue; 1223 pin = mp_find_ioapic_pin(ioapic, gsi); 1224 dstapic = mpc_ioapic_id(ioapic); 1225 1226 for (idx = 0; idx < mp_irq_entries; idx++) { 1227 struct mpc_intsrc *irq = mp_irqs + idx; 1228 1229 /* Do we already have a mapping for this ISA IRQ? */ 1230 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1231 break; 1232 1233 /* Do we already have a mapping for this IOAPIC pin */ 1234 if (irq->dstapic == dstapic && irq->dstirq == pin) 1235 break; 1236 } 1237 1238 if (idx != mp_irq_entries) { 1239 pr_debug("ACPI: IRQ%d used by override.\n", i); 1240 continue; /* IRQ already used */ 1241 } 1242 1243 mp_irq.type = MP_INTSRC; 1244 mp_irq.irqflag = 0; /* Conforming */ 1245 mp_irq.srcbus = MP_ISA_BUS; 1246 mp_irq.dstapic = dstapic; 1247 mp_irq.irqtype = mp_INT; 1248 mp_irq.srcbusirq = i; /* Identity mapped */ 1249 mp_irq.dstirq = pin; 1250 1251 mp_save_irq(&mp_irq); 1252 } 1253 } 1254 1255 /* 1256 * Parse IOAPIC related entries in MADT 1257 * returns 0 on success, < 0 on error 1258 */ 1259 static int __init acpi_parse_madt_ioapic_entries(void) 1260 { 1261 int count; 1262 1263 /* 1264 * ACPI interpreter is required to complete interrupt setup, 1265 * so if it is off, don't enumerate the io-apics with ACPI. 1266 * If MPS is present, it will handle them, 1267 * otherwise the system will stay in PIC mode 1268 */ 1269 if (acpi_disabled || acpi_noirq) 1270 return -ENODEV; 1271 1272 if (!boot_cpu_has(X86_FEATURE_APIC)) 1273 return -ENODEV; 1274 1275 /* 1276 * if "noapic" boot option, don't look for IO-APICs 1277 */ 1278 if (ioapic_is_disabled) { 1279 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1280 return -ENODEV; 1281 } 1282 1283 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1284 MAX_IO_APICS); 1285 if (!count) { 1286 pr_err("No IOAPIC entries present\n"); 1287 return -ENODEV; 1288 } else if (count < 0) { 1289 pr_err("Error parsing IOAPIC entry\n"); 1290 return count; 1291 } 1292 1293 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1294 acpi_parse_int_src_ovr, nr_irqs); 1295 if (count < 0) { 1296 pr_err("Error parsing interrupt source overrides entry\n"); 1297 /* TBD: Cleanup to allow fallback to MPS */ 1298 return count; 1299 } 1300 1301 /* 1302 * If BIOS did not supply an INT_SRC_OVR for the SCI 1303 * pretend we got one so we can set the SCI flags. 1304 * But ignore setting up SCI on hardware reduced platforms. 1305 */ 1306 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1307 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1308 acpi_gbl_FADT.sci_interrupt); 1309 1310 /* Fill in identity legacy mappings where no override */ 1311 mp_config_acpi_legacy_irqs(); 1312 1313 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1314 acpi_parse_nmi_src, nr_irqs); 1315 if (count < 0) { 1316 pr_err("Error parsing NMI SRC entry\n"); 1317 /* TBD: Cleanup to allow fallback to MPS */ 1318 return count; 1319 } 1320 1321 return 0; 1322 } 1323 #else 1324 static inline int acpi_parse_madt_ioapic_entries(void) 1325 { 1326 return -1; 1327 } 1328 #endif /* !CONFIG_X86_IO_APIC */ 1329 1330 static void __init early_acpi_process_madt(void) 1331 { 1332 #ifdef CONFIG_X86_LOCAL_APIC 1333 int error; 1334 1335 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1336 1337 /* 1338 * Parse MADT LAPIC entries 1339 */ 1340 error = early_acpi_parse_madt_lapic_addr_ovr(); 1341 if (!error) { 1342 acpi_lapic = 1; 1343 smp_found_config = 1; 1344 } 1345 if (error == -EINVAL) { 1346 /* 1347 * Dell Precision Workstation 410, 610 come here. 1348 */ 1349 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1350 disable_acpi(); 1351 } 1352 } 1353 #endif 1354 } 1355 1356 static void __init acpi_process_madt(void) 1357 { 1358 #ifdef CONFIG_X86_LOCAL_APIC 1359 int error; 1360 1361 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1362 1363 /* 1364 * Parse MADT LAPIC entries 1365 */ 1366 error = acpi_parse_madt_lapic_entries(); 1367 if (!error) { 1368 acpi_lapic = 1; 1369 1370 /* 1371 * Parse MADT IO-APIC entries 1372 */ 1373 mutex_lock(&acpi_ioapic_lock); 1374 error = acpi_parse_madt_ioapic_entries(); 1375 mutex_unlock(&acpi_ioapic_lock); 1376 if (!error) { 1377 acpi_set_irq_model_ioapic(); 1378 1379 smp_found_config = 1; 1380 } 1381 1382 #ifdef CONFIG_X86_64 1383 /* 1384 * Parse MADT MP Wake entry. 1385 */ 1386 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1387 acpi_parse_mp_wake, 1); 1388 #endif 1389 } 1390 if (error == -EINVAL) { 1391 /* 1392 * Dell Precision Workstation 410, 610 come here. 1393 */ 1394 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1395 disable_acpi(); 1396 } 1397 } else { 1398 /* 1399 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1400 * In the event an MPS table was found, forget it. 1401 * Boot with "acpi=off" to use MPS on such a system. 1402 */ 1403 if (smp_found_config) { 1404 pr_warn("No APIC-table, disabling MPS\n"); 1405 smp_found_config = 0; 1406 } 1407 } 1408 1409 /* 1410 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1411 * processors, where MPS only supports physical. 1412 */ 1413 if (acpi_lapic && acpi_ioapic) 1414 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1415 else if (acpi_lapic) 1416 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1417 #endif 1418 return; 1419 } 1420 1421 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1422 { 1423 if (!acpi_force) { 1424 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1425 acpi_noirq_set(); 1426 } 1427 return 0; 1428 } 1429 1430 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1431 { 1432 if (!acpi_force) { 1433 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1434 acpi_disable_pci(); 1435 } 1436 return 0; 1437 } 1438 1439 static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1440 { 1441 if (!acpi_force) { 1442 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1443 acpi_gbl_do_not_use_xsdt = TRUE; 1444 } else { 1445 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1446 } 1447 return 0; 1448 } 1449 1450 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1451 { 1452 if (!acpi_force) { 1453 pr_notice("%s detected: acpi off\n", d->ident); 1454 disable_acpi(); 1455 } else { 1456 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1457 } 1458 return 0; 1459 } 1460 1461 /* 1462 * Force ignoring BIOS IRQ0 override 1463 */ 1464 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1465 { 1466 if (!acpi_skip_timer_override) { 1467 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1468 d->ident); 1469 acpi_skip_timer_override = 1; 1470 } 1471 return 0; 1472 } 1473 1474 /* 1475 * ACPI offers an alternative platform interface model that removes 1476 * ACPI hardware requirements for platforms that do not implement 1477 * the PC Architecture. 1478 * 1479 * We initialize the Hardware-reduced ACPI model here: 1480 */ 1481 void __init acpi_generic_reduced_hw_init(void) 1482 { 1483 /* 1484 * Override x86_init functions and bypass legacy PIC in 1485 * hardware reduced ACPI mode. 1486 */ 1487 x86_init.timers.timer_init = x86_init_noop; 1488 x86_init.irqs.pre_vector_init = x86_init_noop; 1489 legacy_pic = &null_legacy_pic; 1490 } 1491 1492 static void __init acpi_reduced_hw_init(void) 1493 { 1494 if (acpi_gbl_reduced_hardware) 1495 x86_init.acpi.reduced_hw_early_init(); 1496 } 1497 1498 /* 1499 * If your system is blacklisted here, but you find that acpi=force 1500 * works for you, please contact linux-acpi@vger.kernel.org 1501 */ 1502 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1503 /* 1504 * Boxes that need ACPI disabled 1505 */ 1506 { 1507 .callback = dmi_disable_acpi, 1508 .ident = "IBM Thinkpad", 1509 .matches = { 1510 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1511 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1512 }, 1513 }, 1514 1515 /* 1516 * Boxes that need ACPI PCI IRQ routing disabled 1517 */ 1518 { 1519 .callback = disable_acpi_irq, 1520 .ident = "ASUS A7V", 1521 .matches = { 1522 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1523 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1524 /* newer BIOS, Revision 1011, does work */ 1525 DMI_MATCH(DMI_BIOS_VERSION, 1526 "ASUS A7V ACPI BIOS Revision 1007"), 1527 }, 1528 }, 1529 { 1530 /* 1531 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1532 * for LPC bridge, which is needed for the PCI 1533 * interrupt links to work. DSDT fix is in bug 5966. 1534 * 2645, 2646 model numbers are shared with 600/600E/600X 1535 */ 1536 .callback = disable_acpi_irq, 1537 .ident = "IBM Thinkpad 600 Series 2645", 1538 .matches = { 1539 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1540 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1541 }, 1542 }, 1543 { 1544 .callback = disable_acpi_irq, 1545 .ident = "IBM Thinkpad 600 Series 2646", 1546 .matches = { 1547 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1548 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1549 }, 1550 }, 1551 /* 1552 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1553 */ 1554 { /* _BBN 0 bug */ 1555 .callback = disable_acpi_pci, 1556 .ident = "ASUS PR-DLS", 1557 .matches = { 1558 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1559 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1560 DMI_MATCH(DMI_BIOS_VERSION, 1561 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1562 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1563 }, 1564 }, 1565 { 1566 .callback = disable_acpi_pci, 1567 .ident = "Acer TravelMate 36x Laptop", 1568 .matches = { 1569 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1570 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1571 }, 1572 }, 1573 /* 1574 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1575 */ 1576 { 1577 .callback = disable_acpi_xsdt, 1578 .ident = "Advantech DAC-BJ01", 1579 .matches = { 1580 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1581 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1582 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1583 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1584 }, 1585 }, 1586 {} 1587 }; 1588 1589 /* second table for DMI checks that should run after early-quirks */ 1590 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1591 /* 1592 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1593 * which includes some code which overrides all temperature 1594 * trip points to 16C if the INTIN2 input of the I/O APIC 1595 * is enabled. This input is incorrectly designated the 1596 * ISA IRQ 0 via an interrupt source override even though 1597 * it is wired to the output of the master 8259A and INTIN0 1598 * is not connected at all. Force ignoring BIOS IRQ0 1599 * override in that cases. 1600 */ 1601 { 1602 .callback = dmi_ignore_irq0_timer_override, 1603 .ident = "HP nx6115 laptop", 1604 .matches = { 1605 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1606 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1607 }, 1608 }, 1609 { 1610 .callback = dmi_ignore_irq0_timer_override, 1611 .ident = "HP NX6125 laptop", 1612 .matches = { 1613 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1614 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1615 }, 1616 }, 1617 { 1618 .callback = dmi_ignore_irq0_timer_override, 1619 .ident = "HP NX6325 laptop", 1620 .matches = { 1621 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1622 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1623 }, 1624 }, 1625 { 1626 .callback = dmi_ignore_irq0_timer_override, 1627 .ident = "HP 6715b laptop", 1628 .matches = { 1629 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1630 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1631 }, 1632 }, 1633 { 1634 .callback = dmi_ignore_irq0_timer_override, 1635 .ident = "FUJITSU SIEMENS", 1636 .matches = { 1637 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1638 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1639 }, 1640 }, 1641 {} 1642 }; 1643 1644 /* 1645 * acpi_boot_table_init() and acpi_boot_init() 1646 * called from setup_arch(), always. 1647 * 1. checksums all tables 1648 * 2. enumerates lapics 1649 * 3. enumerates io-apics 1650 * 1651 * acpi_table_init() is separate to allow reading SRAT without 1652 * other side effects. 1653 * 1654 * side effects of acpi_boot_init: 1655 * acpi_lapic = 1 if LAPIC found 1656 * acpi_ioapic = 1 if IOAPIC found 1657 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1658 * if acpi_blacklisted() acpi_disabled = 1; 1659 * acpi_irq_model=... 1660 * ... 1661 */ 1662 1663 void __init acpi_boot_table_init(void) 1664 { 1665 dmi_check_system(acpi_dmi_table); 1666 1667 /* 1668 * If acpi_disabled, bail out 1669 */ 1670 if (acpi_disabled) 1671 return; 1672 1673 /* 1674 * Initialize the ACPI boot-time table parser. 1675 */ 1676 if (acpi_locate_initial_tables()) 1677 disable_acpi(); 1678 else 1679 acpi_reserve_initial_tables(); 1680 } 1681 1682 int __init early_acpi_boot_init(void) 1683 { 1684 if (acpi_disabled) 1685 return 1; 1686 1687 acpi_table_init_complete(); 1688 1689 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1690 1691 /* 1692 * blacklist may disable ACPI entirely 1693 */ 1694 if (acpi_blacklisted()) { 1695 if (acpi_force) { 1696 pr_warn("acpi=force override\n"); 1697 } else { 1698 pr_warn("Disabling ACPI support\n"); 1699 disable_acpi(); 1700 return 1; 1701 } 1702 } 1703 1704 /* 1705 * Process the Multiple APIC Description Table (MADT), if present 1706 */ 1707 early_acpi_process_madt(); 1708 1709 /* 1710 * Hardware-reduced ACPI mode initialization: 1711 */ 1712 acpi_reduced_hw_init(); 1713 1714 return 0; 1715 } 1716 1717 int __init acpi_boot_init(void) 1718 { 1719 /* those are executed after early-quirks are executed */ 1720 dmi_check_system(acpi_dmi_table_late); 1721 1722 /* 1723 * If acpi_disabled, bail out 1724 */ 1725 if (acpi_disabled) 1726 return 1; 1727 1728 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1729 1730 /* 1731 * set sci_int and PM timer address 1732 */ 1733 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1734 1735 /* 1736 * Process the Multiple APIC Description Table (MADT), if present 1737 */ 1738 acpi_process_madt(); 1739 1740 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1741 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1742 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1743 1744 if (!acpi_noirq) 1745 x86_init.pci.init = pci_acpi_init; 1746 1747 /* Do not enable ACPI SPCR console by default */ 1748 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1749 return 0; 1750 } 1751 1752 static int __init parse_acpi(char *arg) 1753 { 1754 if (!arg) 1755 return -EINVAL; 1756 1757 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1758 if (strcmp(arg, "off") == 0) { 1759 disable_acpi(); 1760 } 1761 /* acpi=force to over-ride black-list */ 1762 else if (strcmp(arg, "force") == 0) { 1763 acpi_force = 1; 1764 acpi_disabled = 0; 1765 } 1766 /* acpi=strict disables out-of-spec workarounds */ 1767 else if (strcmp(arg, "strict") == 0) { 1768 acpi_strict = 1; 1769 } 1770 /* acpi=rsdt use RSDT instead of XSDT */ 1771 else if (strcmp(arg, "rsdt") == 0) { 1772 acpi_gbl_do_not_use_xsdt = TRUE; 1773 } 1774 /* "acpi=noirq" disables ACPI interrupt routing */ 1775 else if (strcmp(arg, "noirq") == 0) { 1776 acpi_noirq_set(); 1777 } 1778 /* "acpi=copy_dsdt" copies DSDT */ 1779 else if (strcmp(arg, "copy_dsdt") == 0) { 1780 acpi_gbl_copy_dsdt_locally = 1; 1781 } 1782 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1783 else if (strcmp(arg, "nocmcff") == 0) { 1784 acpi_disable_cmcff = 1; 1785 } else { 1786 /* Core will printk when we return error. */ 1787 return -EINVAL; 1788 } 1789 return 0; 1790 } 1791 early_param("acpi", parse_acpi); 1792 1793 static int __init parse_acpi_bgrt(char *arg) 1794 { 1795 acpi_nobgrt = true; 1796 return 0; 1797 } 1798 early_param("bgrt_disable", parse_acpi_bgrt); 1799 1800 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1801 static int __init parse_pci(char *arg) 1802 { 1803 if (arg && strcmp(arg, "noacpi") == 0) 1804 acpi_disable_pci(); 1805 return 0; 1806 } 1807 early_param("pci", parse_pci); 1808 1809 int __init acpi_mps_check(void) 1810 { 1811 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1812 /* mptable code is not built-in*/ 1813 if (acpi_disabled || acpi_noirq) { 1814 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1815 return 1; 1816 } 1817 #endif 1818 return 0; 1819 } 1820 1821 #ifdef CONFIG_X86_IO_APIC 1822 static int __init parse_acpi_skip_timer_override(char *arg) 1823 { 1824 acpi_skip_timer_override = 1; 1825 return 0; 1826 } 1827 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1828 1829 static int __init parse_acpi_use_timer_override(char *arg) 1830 { 1831 acpi_use_timer_override = 1; 1832 return 0; 1833 } 1834 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1835 #endif /* CONFIG_X86_IO_APIC */ 1836 1837 static int __init setup_acpi_sci(char *s) 1838 { 1839 if (!s) 1840 return -EINVAL; 1841 if (!strcmp(s, "edge")) 1842 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1843 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1844 else if (!strcmp(s, "level")) 1845 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1846 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1847 else if (!strcmp(s, "high")) 1848 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1849 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1850 else if (!strcmp(s, "low")) 1851 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1852 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1853 else 1854 return -EINVAL; 1855 return 0; 1856 } 1857 early_param("acpi_sci", setup_acpi_sci); 1858 1859 int __acpi_acquire_global_lock(unsigned int *lock) 1860 { 1861 unsigned int old, new, val; 1862 1863 old = READ_ONCE(*lock); 1864 do { 1865 val = (old >> 1) & 0x1; 1866 new = (old & ~0x3) + 2 + val; 1867 } while (!try_cmpxchg(lock, &old, new)); 1868 1869 if (val) 1870 return 0; 1871 1872 return -1; 1873 } 1874 1875 int __acpi_release_global_lock(unsigned int *lock) 1876 { 1877 unsigned int old, new; 1878 1879 old = READ_ONCE(*lock); 1880 do { 1881 new = old & ~0x3; 1882 } while (!try_cmpxchg(lock, &old, new)); 1883 return old & 0x1; 1884 } 1885 1886 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1887 { 1888 e820__range_add(addr, size, E820_TYPE_NVS); 1889 e820__update_table_print(); 1890 } 1891 1892 void x86_default_set_root_pointer(u64 addr) 1893 { 1894 boot_params.acpi_rsdp_addr = addr; 1895 } 1896 1897 u64 x86_default_get_root_pointer(void) 1898 { 1899 return boot_params.acpi_rsdp_addr; 1900 } 1901