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 56 /* ACPI SCI override configuration */ 57 u8 acpi_sci_flags __initdata; 58 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 59 int acpi_skip_timer_override __initdata; 60 int acpi_use_timer_override __initdata; 61 int acpi_fix_pin2_polarity __initdata; 62 63 #ifdef CONFIG_X86_LOCAL_APIC 64 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 65 static bool acpi_support_online_capable; 66 #endif 67 68 #ifdef CONFIG_X86_64 69 /* Physical address of the Multiprocessor Wakeup Structure mailbox */ 70 static u64 acpi_mp_wake_mailbox_paddr; 71 /* Virtual address of the Multiprocessor Wakeup Structure mailbox */ 72 static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox; 73 #endif 74 75 #ifdef CONFIG_X86_IO_APIC 76 /* 77 * Locks related to IOAPIC hotplug 78 * Hotplug side: 79 * ->device_hotplug_lock 80 * ->acpi_ioapic_lock 81 * ->ioapic_lock 82 * Interrupt mapping side: 83 * ->acpi_ioapic_lock 84 * ->ioapic_mutex 85 * ->ioapic_lock 86 */ 87 static DEFINE_MUTEX(acpi_ioapic_lock); 88 #endif 89 90 /* -------------------------------------------------------------------------- 91 Boot-time Configuration 92 -------------------------------------------------------------------------- */ 93 94 /* 95 * The default interrupt routing model is PIC (8259). This gets 96 * overridden if IOAPICs are enumerated (below). 97 */ 98 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 99 100 101 /* 102 * ISA irqs by default are the first 16 gsis but can be 103 * any gsi as specified by an interrupt source override. 104 */ 105 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 106 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 107 }; 108 109 /* 110 * This is just a simple wrapper around early_memremap(), 111 * with sanity checks for phys == 0 and size == 0. 112 */ 113 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 114 { 115 116 if (!phys || !size) 117 return NULL; 118 119 return early_memremap(phys, size); 120 } 121 122 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 123 { 124 if (!map || !size) 125 return; 126 127 early_memunmap(map, size); 128 } 129 130 #ifdef CONFIG_X86_LOCAL_APIC 131 static int __init acpi_parse_madt(struct acpi_table_header *table) 132 { 133 struct acpi_table_madt *madt = NULL; 134 135 if (!boot_cpu_has(X86_FEATURE_APIC)) 136 return -EINVAL; 137 138 madt = (struct acpi_table_madt *)table; 139 if (!madt) { 140 pr_warn("Unable to map MADT\n"); 141 return -ENODEV; 142 } 143 144 if (madt->address) { 145 acpi_lapic_addr = (u64) madt->address; 146 147 pr_debug("Local APIC address 0x%08x\n", madt->address); 148 } 149 if (madt->header.revision >= 5) 150 acpi_support_online_capable = true; 151 152 default_acpi_madt_oem_check(madt->header.oem_id, 153 madt->header.oem_table_id); 154 155 return 0; 156 } 157 158 /** 159 * acpi_register_lapic - register a local apic and generates a logic cpu number 160 * @id: local apic id to register 161 * @acpiid: ACPI id to register 162 * @enabled: this cpu is enabled or not 163 * 164 * Returns the logic cpu number which maps to the local apic 165 */ 166 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 167 { 168 unsigned int ver = 0; 169 int cpu; 170 171 if (id >= MAX_LOCAL_APIC) { 172 pr_info("skipped apicid that is too big\n"); 173 return -EINVAL; 174 } 175 176 if (!enabled) { 177 ++disabled_cpus; 178 return -EINVAL; 179 } 180 181 if (boot_cpu_physical_apicid != -1U) 182 ver = boot_cpu_apic_version; 183 184 cpu = generic_processor_info(id, ver); 185 if (cpu >= 0) 186 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 187 188 return cpu; 189 } 190 191 static int __init 192 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 193 { 194 struct acpi_madt_local_x2apic *processor = NULL; 195 #ifdef CONFIG_X86_X2APIC 196 u32 apic_id; 197 u8 enabled; 198 #endif 199 200 processor = (struct acpi_madt_local_x2apic *)header; 201 202 if (BAD_MADT_ENTRY(processor, end)) 203 return -EINVAL; 204 205 acpi_table_print_madt_entry(&header->common); 206 207 #ifdef CONFIG_X86_X2APIC 208 apic_id = processor->local_apic_id; 209 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 210 211 /* Ignore invalid ID */ 212 if (apic_id == 0xffffffff) 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->apic_id_valid(apic_id)) { 223 if (enabled) 224 pr_warn("x2apic entry ignored\n"); 225 return 0; 226 } 227 228 acpi_register_lapic(apic_id, processor->uid, enabled); 229 #else 230 pr_warn("x2apic entry ignored\n"); 231 #endif 232 233 return 0; 234 } 235 236 static int __init 237 acpi_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_support_online_capable && 254 !(processor->lapic_flags & ACPI_MADT_ENABLED) && 255 !(processor->lapic_flags & ACPI_MADT_ONLINE_CAPABLE)) 256 return 0; 257 258 /* 259 * We need to register disabled CPU as well to permit 260 * counting disabled CPUs. This allows us to size 261 * cpus_possible_map more accurately, to permit 262 * to not preallocating memory for all NR_CPUS 263 * when we use CPU hotplug. 264 */ 265 acpi_register_lapic(processor->id, /* APIC ID */ 266 processor->processor_id, /* ACPI ID */ 267 processor->lapic_flags & ACPI_MADT_ENABLED); 268 269 return 0; 270 } 271 272 static int __init 273 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 274 { 275 struct acpi_madt_local_sapic *processor = NULL; 276 277 processor = (struct acpi_madt_local_sapic *)header; 278 279 if (BAD_MADT_ENTRY(processor, end)) 280 return -EINVAL; 281 282 acpi_table_print_madt_entry(&header->common); 283 284 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 285 processor->processor_id, /* ACPI ID */ 286 processor->lapic_flags & ACPI_MADT_ENABLED); 287 288 return 0; 289 } 290 291 static int __init 292 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 293 const unsigned long end) 294 { 295 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 296 297 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 298 299 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 300 return -EINVAL; 301 302 acpi_table_print_madt_entry(&header->common); 303 304 acpi_lapic_addr = lapic_addr_ovr->address; 305 306 return 0; 307 } 308 309 static int __init 310 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 311 const unsigned long end) 312 { 313 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 314 315 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 316 317 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 318 return -EINVAL; 319 320 acpi_table_print_madt_entry(&header->common); 321 322 if (x2apic_nmi->lint != 1) 323 pr_warn("NMI not connected to LINT 1!\n"); 324 325 return 0; 326 } 327 328 static int __init 329 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 330 { 331 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 332 333 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 334 335 if (BAD_MADT_ENTRY(lapic_nmi, end)) 336 return -EINVAL; 337 338 acpi_table_print_madt_entry(&header->common); 339 340 if (lapic_nmi->lint != 1) 341 pr_warn("NMI not connected to LINT 1!\n"); 342 343 return 0; 344 } 345 346 #ifdef CONFIG_X86_64 347 static int acpi_wakeup_cpu(int apicid, unsigned long start_ip) 348 { 349 /* 350 * Remap mailbox memory only for the first call to acpi_wakeup_cpu(). 351 * 352 * Wakeup of secondary CPUs is fully serialized in the core code. 353 * No need to protect acpi_mp_wake_mailbox from concurrent accesses. 354 */ 355 if (!acpi_mp_wake_mailbox) { 356 acpi_mp_wake_mailbox = memremap(acpi_mp_wake_mailbox_paddr, 357 sizeof(*acpi_mp_wake_mailbox), 358 MEMREMAP_WB); 359 } 360 361 /* 362 * Mailbox memory is shared between the firmware and OS. Firmware will 363 * listen on mailbox command address, and once it receives the wakeup 364 * command, the CPU associated with the given apicid will be booted. 365 * 366 * The value of 'apic_id' and 'wakeup_vector' must be visible to the 367 * firmware before the wakeup command is visible. smp_store_release() 368 * ensures ordering and visibility. 369 */ 370 acpi_mp_wake_mailbox->apic_id = apicid; 371 acpi_mp_wake_mailbox->wakeup_vector = start_ip; 372 smp_store_release(&acpi_mp_wake_mailbox->command, 373 ACPI_MP_WAKE_COMMAND_WAKEUP); 374 375 /* 376 * Wait for the CPU to wake up. 377 * 378 * The CPU being woken up is essentially in a spin loop waiting to be 379 * woken up. It should not take long for it wake up and acknowledge by 380 * zeroing out ->command. 381 * 382 * ACPI specification doesn't provide any guidance on how long kernel 383 * has to wait for a wake up acknowledgement. It also doesn't provide 384 * a way to cancel a wake up request if it takes too long. 385 * 386 * In TDX environment, the VMM has control over how long it takes to 387 * wake up secondary. It can postpone scheduling secondary vCPU 388 * indefinitely. Giving up on wake up request and reporting error opens 389 * possible attack vector for VMM: it can wake up a secondary CPU when 390 * kernel doesn't expect it. Wait until positive result of the wake up 391 * request. 392 */ 393 while (READ_ONCE(acpi_mp_wake_mailbox->command)) 394 cpu_relax(); 395 396 return 0; 397 } 398 #endif /* CONFIG_X86_64 */ 399 #endif /* CONFIG_X86_LOCAL_APIC */ 400 401 #ifdef CONFIG_X86_IO_APIC 402 #define MP_ISA_BUS 0 403 404 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 405 u8 trigger, u32 gsi); 406 407 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 408 u32 gsi) 409 { 410 /* 411 * Check bus_irq boundary. 412 */ 413 if (bus_irq >= NR_IRQS_LEGACY) { 414 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 415 return; 416 } 417 418 /* 419 * TBD: This check is for faulty timer entries, where the override 420 * erroneously sets the trigger to level, resulting in a HUGE 421 * increase of timer interrupts! 422 */ 423 if ((bus_irq == 0) && (trigger == 3)) 424 trigger = 1; 425 426 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 427 return; 428 /* 429 * Reset default identity mapping if gsi is also an legacy IRQ, 430 * otherwise there will be more than one entry with the same GSI 431 * and acpi_isa_irq_to_gsi() may give wrong result. 432 */ 433 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 434 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 435 isa_irq_to_gsi[bus_irq] = gsi; 436 } 437 438 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 439 int polarity) 440 { 441 #ifdef CONFIG_X86_MPPARSE 442 struct mpc_intsrc mp_irq; 443 struct pci_dev *pdev; 444 unsigned char number; 445 unsigned int devfn; 446 int ioapic; 447 u8 pin; 448 449 if (!acpi_ioapic) 450 return 0; 451 if (!dev || !dev_is_pci(dev)) 452 return 0; 453 454 pdev = to_pci_dev(dev); 455 number = pdev->bus->number; 456 devfn = pdev->devfn; 457 pin = pdev->pin; 458 /* print the entry should happen on mptable identically */ 459 mp_irq.type = MP_INTSRC; 460 mp_irq.irqtype = mp_INT; 461 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 462 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 463 mp_irq.srcbus = number; 464 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 465 ioapic = mp_find_ioapic(gsi); 466 mp_irq.dstapic = mpc_ioapic_id(ioapic); 467 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 468 469 mp_save_irq(&mp_irq); 470 #endif 471 return 0; 472 } 473 474 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 475 u8 trigger, u32 gsi) 476 { 477 struct mpc_intsrc mp_irq; 478 int ioapic, pin; 479 480 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 481 ioapic = mp_find_ioapic(gsi); 482 if (ioapic < 0) { 483 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 484 return ioapic; 485 } 486 487 pin = mp_find_ioapic_pin(ioapic, gsi); 488 489 mp_irq.type = MP_INTSRC; 490 mp_irq.irqtype = mp_INT; 491 mp_irq.irqflag = (trigger << 2) | polarity; 492 mp_irq.srcbus = MP_ISA_BUS; 493 mp_irq.srcbusirq = bus_irq; 494 mp_irq.dstapic = mpc_ioapic_id(ioapic); 495 mp_irq.dstirq = pin; 496 497 mp_save_irq(&mp_irq); 498 499 return 0; 500 } 501 502 static int __init 503 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 504 { 505 struct acpi_madt_io_apic *ioapic = NULL; 506 struct ioapic_domain_cfg cfg = { 507 .type = IOAPIC_DOMAIN_DYNAMIC, 508 .ops = &mp_ioapic_irqdomain_ops, 509 }; 510 511 ioapic = (struct acpi_madt_io_apic *)header; 512 513 if (BAD_MADT_ENTRY(ioapic, end)) 514 return -EINVAL; 515 516 acpi_table_print_madt_entry(&header->common); 517 518 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 519 if (ioapic->global_irq_base < nr_legacy_irqs()) 520 cfg.type = IOAPIC_DOMAIN_LEGACY; 521 522 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 523 &cfg); 524 525 return 0; 526 } 527 528 /* 529 * Parse Interrupt Source Override for the ACPI SCI 530 */ 531 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 532 { 533 if (trigger == 0) /* compatible SCI trigger is level */ 534 trigger = 3; 535 536 if (polarity == 0) /* compatible SCI polarity is low */ 537 polarity = 3; 538 539 /* Command-line over-ride via acpi_sci= */ 540 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 541 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 542 543 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 544 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 545 546 if (bus_irq < NR_IRQS_LEGACY) 547 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 548 else 549 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 550 551 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 552 553 /* 554 * stash over-ride to indicate we've been here 555 * and for later update of acpi_gbl_FADT 556 */ 557 acpi_sci_override_gsi = gsi; 558 return; 559 } 560 561 static int __init 562 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 563 const unsigned long end) 564 { 565 struct acpi_madt_interrupt_override *intsrc = NULL; 566 567 intsrc = (struct acpi_madt_interrupt_override *)header; 568 569 if (BAD_MADT_ENTRY(intsrc, end)) 570 return -EINVAL; 571 572 acpi_table_print_madt_entry(&header->common); 573 574 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 575 acpi_sci_ioapic_setup(intsrc->source_irq, 576 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 577 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 578 intsrc->global_irq); 579 return 0; 580 } 581 582 if (intsrc->source_irq == 0) { 583 if (acpi_skip_timer_override) { 584 pr_warn("BIOS IRQ0 override ignored.\n"); 585 return 0; 586 } 587 588 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 589 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 590 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 591 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 592 } 593 } 594 595 mp_override_legacy_irq(intsrc->source_irq, 596 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 597 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 598 intsrc->global_irq); 599 600 return 0; 601 } 602 603 static int __init 604 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 605 { 606 struct acpi_madt_nmi_source *nmi_src = NULL; 607 608 nmi_src = (struct acpi_madt_nmi_source *)header; 609 610 if (BAD_MADT_ENTRY(nmi_src, end)) 611 return -EINVAL; 612 613 acpi_table_print_madt_entry(&header->common); 614 615 /* TBD: Support nimsrc entries? */ 616 617 return 0; 618 } 619 620 #endif /* CONFIG_X86_IO_APIC */ 621 622 /* 623 * acpi_pic_sci_set_trigger() 624 * 625 * use ELCR to set PIC-mode trigger type for SCI 626 * 627 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 628 * it may require Edge Trigger -- use "acpi_sci=edge" 629 * 630 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 631 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 632 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 633 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 634 */ 635 636 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 637 { 638 unsigned int mask = 1 << irq; 639 unsigned int old, new; 640 641 /* Real old ELCR mask */ 642 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 643 644 /* 645 * If we use ACPI to set PCI IRQs, then we should clear ELCR 646 * since we will set it correctly as we enable the PCI irq 647 * routing. 648 */ 649 new = acpi_noirq ? old : 0; 650 651 /* 652 * Update SCI information in the ELCR, it isn't in the PCI 653 * routing tables.. 654 */ 655 switch (trigger) { 656 case 1: /* Edge - clear */ 657 new &= ~mask; 658 break; 659 case 3: /* Level - set */ 660 new |= mask; 661 break; 662 } 663 664 if (old == new) 665 return; 666 667 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 668 outb(new, PIC_ELCR1); 669 outb(new >> 8, PIC_ELCR2); 670 } 671 672 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 673 { 674 int rc, irq, trigger, polarity; 675 676 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 677 *irqp = gsi; 678 return 0; 679 } 680 681 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 682 if (rc) 683 return rc; 684 685 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 686 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 687 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 688 if (irq < 0) 689 return irq; 690 691 *irqp = irq; 692 return 0; 693 } 694 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 695 696 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 697 { 698 if (isa_irq < nr_legacy_irqs() && 699 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 700 *gsi = isa_irq_to_gsi[isa_irq]; 701 return 0; 702 } 703 704 return -1; 705 } 706 707 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 708 int trigger, int polarity) 709 { 710 #ifdef CONFIG_PCI 711 /* 712 * Make sure all (legacy) PCI IRQs are set as level-triggered. 713 */ 714 if (trigger == ACPI_LEVEL_SENSITIVE) 715 elcr_set_level_irq(gsi); 716 #endif 717 718 return gsi; 719 } 720 721 #ifdef CONFIG_X86_LOCAL_APIC 722 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 723 int trigger, int polarity) 724 { 725 int irq = gsi; 726 #ifdef CONFIG_X86_IO_APIC 727 int node; 728 struct irq_alloc_info info; 729 730 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 731 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 732 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 733 ioapic_set_alloc_attr(&info, node, trigger, polarity); 734 735 mutex_lock(&acpi_ioapic_lock); 736 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 737 /* Don't set up the ACPI SCI because it's already set up */ 738 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 739 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 740 mutex_unlock(&acpi_ioapic_lock); 741 #endif 742 743 return irq; 744 } 745 746 static void acpi_unregister_gsi_ioapic(u32 gsi) 747 { 748 #ifdef CONFIG_X86_IO_APIC 749 int irq; 750 751 mutex_lock(&acpi_ioapic_lock); 752 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 753 if (irq > 0) 754 mp_unmap_irq(irq); 755 mutex_unlock(&acpi_ioapic_lock); 756 #endif 757 } 758 #endif 759 760 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 761 int trigger, int polarity) = acpi_register_gsi_pic; 762 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 763 764 #ifdef CONFIG_ACPI_SLEEP 765 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 766 #else 767 int (*acpi_suspend_lowlevel)(void); 768 #endif 769 770 /* 771 * success: return IRQ number (>=0) 772 * failure: return < 0 773 */ 774 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 775 { 776 return __acpi_register_gsi(dev, gsi, trigger, polarity); 777 } 778 EXPORT_SYMBOL_GPL(acpi_register_gsi); 779 780 void acpi_unregister_gsi(u32 gsi) 781 { 782 if (__acpi_unregister_gsi) 783 __acpi_unregister_gsi(gsi); 784 } 785 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 786 787 #ifdef CONFIG_X86_LOCAL_APIC 788 static void __init acpi_set_irq_model_ioapic(void) 789 { 790 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 791 __acpi_register_gsi = acpi_register_gsi_ioapic; 792 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 793 acpi_ioapic = 1; 794 } 795 #endif 796 797 /* 798 * ACPI based hotplug support for CPU 799 */ 800 #ifdef CONFIG_ACPI_HOTPLUG_CPU 801 #include <acpi/processor.h> 802 803 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 804 { 805 #ifdef CONFIG_ACPI_NUMA 806 int nid; 807 808 nid = acpi_get_node(handle); 809 if (nid != NUMA_NO_NODE) { 810 set_apicid_to_node(physid, nid); 811 numa_set_node(cpu, nid); 812 } 813 #endif 814 return 0; 815 } 816 817 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 818 int *pcpu) 819 { 820 int cpu; 821 822 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 823 if (cpu < 0) { 824 pr_info("Unable to map lapic to logical cpu number\n"); 825 return cpu; 826 } 827 828 acpi_processor_set_pdc(handle); 829 acpi_map_cpu2node(handle, cpu, physid); 830 831 *pcpu = cpu; 832 return 0; 833 } 834 EXPORT_SYMBOL(acpi_map_cpu); 835 836 int acpi_unmap_cpu(int cpu) 837 { 838 #ifdef CONFIG_ACPI_NUMA 839 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 840 #endif 841 842 per_cpu(x86_cpu_to_apicid, cpu) = -1; 843 set_cpu_present(cpu, false); 844 num_processors--; 845 846 return (0); 847 } 848 EXPORT_SYMBOL(acpi_unmap_cpu); 849 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 850 851 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 852 { 853 int ret = -ENOSYS; 854 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 855 int ioapic_id; 856 u64 addr; 857 struct ioapic_domain_cfg cfg = { 858 .type = IOAPIC_DOMAIN_DYNAMIC, 859 .ops = &mp_ioapic_irqdomain_ops, 860 }; 861 862 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 863 if (ioapic_id < 0) { 864 unsigned long long uid; 865 acpi_status status; 866 867 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 868 NULL, &uid); 869 if (ACPI_FAILURE(status)) { 870 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 871 return -EINVAL; 872 } 873 ioapic_id = (int)uid; 874 } 875 876 mutex_lock(&acpi_ioapic_lock); 877 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 878 mutex_unlock(&acpi_ioapic_lock); 879 #endif 880 881 return ret; 882 } 883 EXPORT_SYMBOL(acpi_register_ioapic); 884 885 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 886 { 887 int ret = -ENOSYS; 888 889 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 890 mutex_lock(&acpi_ioapic_lock); 891 ret = mp_unregister_ioapic(gsi_base); 892 mutex_unlock(&acpi_ioapic_lock); 893 #endif 894 895 return ret; 896 } 897 EXPORT_SYMBOL(acpi_unregister_ioapic); 898 899 /** 900 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 901 * has been registered 902 * @handle: ACPI handle of the IOAPIC device 903 * @gsi_base: GSI base associated with the IOAPIC 904 * 905 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 906 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 907 */ 908 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 909 { 910 int ret = 0; 911 912 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 913 mutex_lock(&acpi_ioapic_lock); 914 ret = mp_ioapic_registered(gsi_base); 915 mutex_unlock(&acpi_ioapic_lock); 916 #endif 917 918 return ret; 919 } 920 921 static int __init acpi_parse_sbf(struct acpi_table_header *table) 922 { 923 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 924 925 sbf_port = sb->cmos_index; /* Save CMOS port */ 926 927 return 0; 928 } 929 930 #ifdef CONFIG_HPET_TIMER 931 #include <asm/hpet.h> 932 933 static struct resource *hpet_res __initdata; 934 935 static int __init acpi_parse_hpet(struct acpi_table_header *table) 936 { 937 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 938 939 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 940 pr_warn("HPET timers must be located in memory.\n"); 941 return -1; 942 } 943 944 hpet_address = hpet_tbl->address.address; 945 hpet_blockid = hpet_tbl->sequence; 946 947 /* 948 * Some broken BIOSes advertise HPET at 0x0. We really do not 949 * want to allocate a resource there. 950 */ 951 if (!hpet_address) { 952 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 953 return 0; 954 } 955 #ifdef CONFIG_X86_64 956 /* 957 * Some even more broken BIOSes advertise HPET at 958 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 959 * some noise: 960 */ 961 if (hpet_address == 0xfed0000000000000UL) { 962 if (!hpet_force_user) { 963 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 964 hpet_tbl->id); 965 hpet_address = 0; 966 return 0; 967 } 968 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 969 hpet_tbl->id); 970 hpet_address >>= 32; 971 } 972 #endif 973 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 974 975 /* 976 * Allocate and initialize the HPET firmware resource for adding into 977 * the resource tree during the lateinit timeframe. 978 */ 979 #define HPET_RESOURCE_NAME_SIZE 9 980 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 981 SMP_CACHE_BYTES); 982 if (!hpet_res) 983 panic("%s: Failed to allocate %zu bytes\n", __func__, 984 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 985 986 hpet_res->name = (void *)&hpet_res[1]; 987 hpet_res->flags = IORESOURCE_MEM; 988 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 989 hpet_tbl->sequence); 990 991 hpet_res->start = hpet_address; 992 hpet_res->end = hpet_address + (1 * 1024) - 1; 993 994 return 0; 995 } 996 997 /* 998 * hpet_insert_resource inserts the HPET resources used into the resource 999 * tree. 1000 */ 1001 static __init int hpet_insert_resource(void) 1002 { 1003 if (!hpet_res) 1004 return 1; 1005 1006 return insert_resource(&iomem_resource, hpet_res); 1007 } 1008 1009 late_initcall(hpet_insert_resource); 1010 1011 #else 1012 #define acpi_parse_hpet NULL 1013 #endif 1014 1015 static int __init acpi_parse_fadt(struct acpi_table_header *table) 1016 { 1017 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 1018 pr_debug("no legacy devices present\n"); 1019 x86_platform.legacy.devices.pnpbios = 0; 1020 } 1021 1022 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 1023 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 1024 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 1025 pr_debug("i8042 controller is absent\n"); 1026 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 1027 } 1028 1029 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 1030 pr_debug("not registering RTC platform device\n"); 1031 x86_platform.legacy.rtc = 0; 1032 } 1033 1034 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 1035 pr_debug("probing for VGA not safe\n"); 1036 x86_platform.legacy.no_vga = 1; 1037 } 1038 1039 #ifdef CONFIG_X86_PM_TIMER 1040 /* detect the location of the ACPI PM Timer */ 1041 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 1042 /* FADT rev. 2 */ 1043 if (acpi_gbl_FADT.xpm_timer_block.space_id != 1044 ACPI_ADR_SPACE_SYSTEM_IO) 1045 return 0; 1046 1047 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1048 /* 1049 * "X" fields are optional extensions to the original V1.0 1050 * fields, so we must selectively expand V1.0 fields if the 1051 * corresponding X field is zero. 1052 */ 1053 if (!pmtmr_ioport) 1054 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1055 } else { 1056 /* FADT rev. 1 */ 1057 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1058 } 1059 if (pmtmr_ioport) 1060 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 1061 #endif 1062 return 0; 1063 } 1064 1065 #ifdef CONFIG_X86_LOCAL_APIC 1066 /* 1067 * Parse LAPIC entries in MADT 1068 * returns 0 on success, < 0 on error 1069 */ 1070 1071 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1072 { 1073 int count; 1074 1075 if (!boot_cpu_has(X86_FEATURE_APIC)) 1076 return -ENODEV; 1077 1078 /* 1079 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1080 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1081 */ 1082 1083 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1084 acpi_parse_lapic_addr_ovr, 0); 1085 if (count < 0) { 1086 pr_err("Error parsing LAPIC address override entry\n"); 1087 return count; 1088 } 1089 1090 register_lapic_address(acpi_lapic_addr); 1091 1092 return count; 1093 } 1094 1095 static int __init acpi_parse_madt_lapic_entries(void) 1096 { 1097 int count; 1098 int x2count = 0; 1099 int ret; 1100 struct acpi_subtable_proc madt_proc[2]; 1101 1102 if (!boot_cpu_has(X86_FEATURE_APIC)) 1103 return -ENODEV; 1104 1105 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1106 acpi_parse_sapic, MAX_LOCAL_APIC); 1107 1108 if (!count) { 1109 memset(madt_proc, 0, sizeof(madt_proc)); 1110 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1111 madt_proc[0].handler = acpi_parse_lapic; 1112 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1113 madt_proc[1].handler = acpi_parse_x2apic; 1114 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1115 sizeof(struct acpi_table_madt), 1116 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1117 if (ret < 0) { 1118 pr_err("Error parsing LAPIC/X2APIC entries\n"); 1119 return ret; 1120 } 1121 1122 count = madt_proc[0].count; 1123 x2count = madt_proc[1].count; 1124 } 1125 if (!count && !x2count) { 1126 pr_err("No LAPIC entries present\n"); 1127 /* TBD: Cleanup to allow fallback to MPS */ 1128 return -ENODEV; 1129 } else if (count < 0 || x2count < 0) { 1130 pr_err("Error parsing LAPIC entry\n"); 1131 /* TBD: Cleanup to allow fallback to MPS */ 1132 return count; 1133 } 1134 1135 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1136 acpi_parse_x2apic_nmi, 0); 1137 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1138 acpi_parse_lapic_nmi, 0); 1139 if (count < 0 || x2count < 0) { 1140 pr_err("Error parsing LAPIC NMI entry\n"); 1141 /* TBD: Cleanup to allow fallback to MPS */ 1142 return count; 1143 } 1144 return 0; 1145 } 1146 1147 #ifdef CONFIG_X86_64 1148 static int __init acpi_parse_mp_wake(union acpi_subtable_headers *header, 1149 const unsigned long end) 1150 { 1151 struct acpi_madt_multiproc_wakeup *mp_wake; 1152 1153 if (!IS_ENABLED(CONFIG_SMP)) 1154 return -ENODEV; 1155 1156 mp_wake = (struct acpi_madt_multiproc_wakeup *)header; 1157 if (BAD_MADT_ENTRY(mp_wake, end)) 1158 return -EINVAL; 1159 1160 acpi_table_print_madt_entry(&header->common); 1161 1162 acpi_mp_wake_mailbox_paddr = mp_wake->base_address; 1163 1164 acpi_wake_cpu_handler_update(acpi_wakeup_cpu); 1165 1166 return 0; 1167 } 1168 #endif /* CONFIG_X86_64 */ 1169 #endif /* CONFIG_X86_LOCAL_APIC */ 1170 1171 #ifdef CONFIG_X86_IO_APIC 1172 static void __init mp_config_acpi_legacy_irqs(void) 1173 { 1174 int i; 1175 struct mpc_intsrc mp_irq; 1176 1177 #ifdef CONFIG_EISA 1178 /* 1179 * Fabricate the legacy ISA bus (bus #31). 1180 */ 1181 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1182 #endif 1183 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1184 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1185 1186 /* 1187 * Use the default configuration for the IRQs 0-15. Unless 1188 * overridden by (MADT) interrupt source override entries. 1189 */ 1190 for (i = 0; i < nr_legacy_irqs(); i++) { 1191 int ioapic, pin; 1192 unsigned int dstapic; 1193 int idx; 1194 u32 gsi; 1195 1196 /* Locate the gsi that irq i maps to. */ 1197 if (acpi_isa_irq_to_gsi(i, &gsi)) 1198 continue; 1199 1200 /* 1201 * Locate the IOAPIC that manages the ISA IRQ. 1202 */ 1203 ioapic = mp_find_ioapic(gsi); 1204 if (ioapic < 0) 1205 continue; 1206 pin = mp_find_ioapic_pin(ioapic, gsi); 1207 dstapic = mpc_ioapic_id(ioapic); 1208 1209 for (idx = 0; idx < mp_irq_entries; idx++) { 1210 struct mpc_intsrc *irq = mp_irqs + idx; 1211 1212 /* Do we already have a mapping for this ISA IRQ? */ 1213 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1214 break; 1215 1216 /* Do we already have a mapping for this IOAPIC pin */ 1217 if (irq->dstapic == dstapic && irq->dstirq == pin) 1218 break; 1219 } 1220 1221 if (idx != mp_irq_entries) { 1222 pr_debug("ACPI: IRQ%d used by override.\n", i); 1223 continue; /* IRQ already used */ 1224 } 1225 1226 mp_irq.type = MP_INTSRC; 1227 mp_irq.irqflag = 0; /* Conforming */ 1228 mp_irq.srcbus = MP_ISA_BUS; 1229 mp_irq.dstapic = dstapic; 1230 mp_irq.irqtype = mp_INT; 1231 mp_irq.srcbusirq = i; /* Identity mapped */ 1232 mp_irq.dstirq = pin; 1233 1234 mp_save_irq(&mp_irq); 1235 } 1236 } 1237 1238 /* 1239 * Parse IOAPIC related entries in MADT 1240 * returns 0 on success, < 0 on error 1241 */ 1242 static int __init acpi_parse_madt_ioapic_entries(void) 1243 { 1244 int count; 1245 1246 /* 1247 * ACPI interpreter is required to complete interrupt setup, 1248 * so if it is off, don't enumerate the io-apics with ACPI. 1249 * If MPS is present, it will handle them, 1250 * otherwise the system will stay in PIC mode 1251 */ 1252 if (acpi_disabled || acpi_noirq) 1253 return -ENODEV; 1254 1255 if (!boot_cpu_has(X86_FEATURE_APIC)) 1256 return -ENODEV; 1257 1258 /* 1259 * if "noapic" boot option, don't look for IO-APICs 1260 */ 1261 if (skip_ioapic_setup) { 1262 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1263 return -ENODEV; 1264 } 1265 1266 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1267 MAX_IO_APICS); 1268 if (!count) { 1269 pr_err("No IOAPIC entries present\n"); 1270 return -ENODEV; 1271 } else if (count < 0) { 1272 pr_err("Error parsing IOAPIC entry\n"); 1273 return count; 1274 } 1275 1276 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1277 acpi_parse_int_src_ovr, nr_irqs); 1278 if (count < 0) { 1279 pr_err("Error parsing interrupt source overrides entry\n"); 1280 /* TBD: Cleanup to allow fallback to MPS */ 1281 return count; 1282 } 1283 1284 /* 1285 * If BIOS did not supply an INT_SRC_OVR for the SCI 1286 * pretend we got one so we can set the SCI flags. 1287 * But ignore setting up SCI on hardware reduced platforms. 1288 */ 1289 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1290 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1291 acpi_gbl_FADT.sci_interrupt); 1292 1293 /* Fill in identity legacy mappings where no override */ 1294 mp_config_acpi_legacy_irqs(); 1295 1296 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1297 acpi_parse_nmi_src, nr_irqs); 1298 if (count < 0) { 1299 pr_err("Error parsing NMI SRC entry\n"); 1300 /* TBD: Cleanup to allow fallback to MPS */ 1301 return count; 1302 } 1303 1304 return 0; 1305 } 1306 #else 1307 static inline int acpi_parse_madt_ioapic_entries(void) 1308 { 1309 return -1; 1310 } 1311 #endif /* !CONFIG_X86_IO_APIC */ 1312 1313 static void __init early_acpi_process_madt(void) 1314 { 1315 #ifdef CONFIG_X86_LOCAL_APIC 1316 int error; 1317 1318 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1319 1320 /* 1321 * Parse MADT LAPIC entries 1322 */ 1323 error = early_acpi_parse_madt_lapic_addr_ovr(); 1324 if (!error) { 1325 acpi_lapic = 1; 1326 smp_found_config = 1; 1327 } 1328 if (error == -EINVAL) { 1329 /* 1330 * Dell Precision Workstation 410, 610 come here. 1331 */ 1332 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1333 disable_acpi(); 1334 } 1335 } 1336 #endif 1337 } 1338 1339 static void __init acpi_process_madt(void) 1340 { 1341 #ifdef CONFIG_X86_LOCAL_APIC 1342 int error; 1343 1344 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1345 1346 /* 1347 * Parse MADT LAPIC entries 1348 */ 1349 error = acpi_parse_madt_lapic_entries(); 1350 if (!error) { 1351 acpi_lapic = 1; 1352 1353 /* 1354 * Parse MADT IO-APIC entries 1355 */ 1356 mutex_lock(&acpi_ioapic_lock); 1357 error = acpi_parse_madt_ioapic_entries(); 1358 mutex_unlock(&acpi_ioapic_lock); 1359 if (!error) { 1360 acpi_set_irq_model_ioapic(); 1361 1362 smp_found_config = 1; 1363 } 1364 1365 #ifdef CONFIG_X86_64 1366 /* 1367 * Parse MADT MP Wake entry. 1368 */ 1369 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1370 acpi_parse_mp_wake, 1); 1371 #endif 1372 } 1373 if (error == -EINVAL) { 1374 /* 1375 * Dell Precision Workstation 410, 610 come here. 1376 */ 1377 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1378 disable_acpi(); 1379 } 1380 } else { 1381 /* 1382 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1383 * In the event an MPS table was found, forget it. 1384 * Boot with "acpi=off" to use MPS on such a system. 1385 */ 1386 if (smp_found_config) { 1387 pr_warn("No APIC-table, disabling MPS\n"); 1388 smp_found_config = 0; 1389 } 1390 } 1391 1392 /* 1393 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1394 * processors, where MPS only supports physical. 1395 */ 1396 if (acpi_lapic && acpi_ioapic) 1397 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1398 else if (acpi_lapic) 1399 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1400 #endif 1401 return; 1402 } 1403 1404 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1405 { 1406 if (!acpi_force) { 1407 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1408 acpi_noirq_set(); 1409 } 1410 return 0; 1411 } 1412 1413 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1414 { 1415 if (!acpi_force) { 1416 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1417 acpi_disable_pci(); 1418 } 1419 return 0; 1420 } 1421 1422 static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1423 { 1424 if (!acpi_force) { 1425 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1426 acpi_gbl_do_not_use_xsdt = TRUE; 1427 } else { 1428 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1429 } 1430 return 0; 1431 } 1432 1433 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1434 { 1435 if (!acpi_force) { 1436 pr_notice("%s detected: acpi off\n", d->ident); 1437 disable_acpi(); 1438 } else { 1439 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1440 } 1441 return 0; 1442 } 1443 1444 /* 1445 * Force ignoring BIOS IRQ0 override 1446 */ 1447 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1448 { 1449 if (!acpi_skip_timer_override) { 1450 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1451 d->ident); 1452 acpi_skip_timer_override = 1; 1453 } 1454 return 0; 1455 } 1456 1457 /* 1458 * ACPI offers an alternative platform interface model that removes 1459 * ACPI hardware requirements for platforms that do not implement 1460 * the PC Architecture. 1461 * 1462 * We initialize the Hardware-reduced ACPI model here: 1463 */ 1464 void __init acpi_generic_reduced_hw_init(void) 1465 { 1466 /* 1467 * Override x86_init functions and bypass legacy PIC in 1468 * hardware reduced ACPI mode. 1469 */ 1470 x86_init.timers.timer_init = x86_init_noop; 1471 x86_init.irqs.pre_vector_init = x86_init_noop; 1472 legacy_pic = &null_legacy_pic; 1473 } 1474 1475 static void __init acpi_reduced_hw_init(void) 1476 { 1477 if (acpi_gbl_reduced_hardware) 1478 x86_init.acpi.reduced_hw_early_init(); 1479 } 1480 1481 /* 1482 * If your system is blacklisted here, but you find that acpi=force 1483 * works for you, please contact linux-acpi@vger.kernel.org 1484 */ 1485 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1486 /* 1487 * Boxes that need ACPI disabled 1488 */ 1489 { 1490 .callback = dmi_disable_acpi, 1491 .ident = "IBM Thinkpad", 1492 .matches = { 1493 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1494 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1495 }, 1496 }, 1497 1498 /* 1499 * Boxes that need ACPI PCI IRQ routing disabled 1500 */ 1501 { 1502 .callback = disable_acpi_irq, 1503 .ident = "ASUS A7V", 1504 .matches = { 1505 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1506 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1507 /* newer BIOS, Revision 1011, does work */ 1508 DMI_MATCH(DMI_BIOS_VERSION, 1509 "ASUS A7V ACPI BIOS Revision 1007"), 1510 }, 1511 }, 1512 { 1513 /* 1514 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1515 * for LPC bridge, which is needed for the PCI 1516 * interrupt links to work. DSDT fix is in bug 5966. 1517 * 2645, 2646 model numbers are shared with 600/600E/600X 1518 */ 1519 .callback = disable_acpi_irq, 1520 .ident = "IBM Thinkpad 600 Series 2645", 1521 .matches = { 1522 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1523 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1524 }, 1525 }, 1526 { 1527 .callback = disable_acpi_irq, 1528 .ident = "IBM Thinkpad 600 Series 2646", 1529 .matches = { 1530 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1531 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1532 }, 1533 }, 1534 /* 1535 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1536 */ 1537 { /* _BBN 0 bug */ 1538 .callback = disable_acpi_pci, 1539 .ident = "ASUS PR-DLS", 1540 .matches = { 1541 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1542 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1543 DMI_MATCH(DMI_BIOS_VERSION, 1544 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1545 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1546 }, 1547 }, 1548 { 1549 .callback = disable_acpi_pci, 1550 .ident = "Acer TravelMate 36x Laptop", 1551 .matches = { 1552 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1553 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1554 }, 1555 }, 1556 /* 1557 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1558 */ 1559 { 1560 .callback = disable_acpi_xsdt, 1561 .ident = "Advantech DAC-BJ01", 1562 .matches = { 1563 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1564 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1565 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1566 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1567 }, 1568 }, 1569 {} 1570 }; 1571 1572 /* second table for DMI checks that should run after early-quirks */ 1573 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1574 /* 1575 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1576 * which includes some code which overrides all temperature 1577 * trip points to 16C if the INTIN2 input of the I/O APIC 1578 * is enabled. This input is incorrectly designated the 1579 * ISA IRQ 0 via an interrupt source override even though 1580 * it is wired to the output of the master 8259A and INTIN0 1581 * is not connected at all. Force ignoring BIOS IRQ0 1582 * override in that cases. 1583 */ 1584 { 1585 .callback = dmi_ignore_irq0_timer_override, 1586 .ident = "HP nx6115 laptop", 1587 .matches = { 1588 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1589 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1590 }, 1591 }, 1592 { 1593 .callback = dmi_ignore_irq0_timer_override, 1594 .ident = "HP NX6125 laptop", 1595 .matches = { 1596 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1597 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1598 }, 1599 }, 1600 { 1601 .callback = dmi_ignore_irq0_timer_override, 1602 .ident = "HP NX6325 laptop", 1603 .matches = { 1604 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1605 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1606 }, 1607 }, 1608 { 1609 .callback = dmi_ignore_irq0_timer_override, 1610 .ident = "HP 6715b laptop", 1611 .matches = { 1612 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1613 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1614 }, 1615 }, 1616 { 1617 .callback = dmi_ignore_irq0_timer_override, 1618 .ident = "FUJITSU SIEMENS", 1619 .matches = { 1620 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1621 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1622 }, 1623 }, 1624 {} 1625 }; 1626 1627 /* 1628 * acpi_boot_table_init() and acpi_boot_init() 1629 * called from setup_arch(), always. 1630 * 1. checksums all tables 1631 * 2. enumerates lapics 1632 * 3. enumerates io-apics 1633 * 1634 * acpi_table_init() is separate to allow reading SRAT without 1635 * other side effects. 1636 * 1637 * side effects of acpi_boot_init: 1638 * acpi_lapic = 1 if LAPIC found 1639 * acpi_ioapic = 1 if IOAPIC found 1640 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1641 * if acpi_blacklisted() acpi_disabled = 1; 1642 * acpi_irq_model=... 1643 * ... 1644 */ 1645 1646 void __init acpi_boot_table_init(void) 1647 { 1648 dmi_check_system(acpi_dmi_table); 1649 1650 /* 1651 * If acpi_disabled, bail out 1652 */ 1653 if (acpi_disabled) 1654 return; 1655 1656 /* 1657 * Initialize the ACPI boot-time table parser. 1658 */ 1659 if (acpi_locate_initial_tables()) 1660 disable_acpi(); 1661 else 1662 acpi_reserve_initial_tables(); 1663 } 1664 1665 int __init early_acpi_boot_init(void) 1666 { 1667 if (acpi_disabled) 1668 return 1; 1669 1670 acpi_table_init_complete(); 1671 1672 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1673 1674 /* 1675 * blacklist may disable ACPI entirely 1676 */ 1677 if (acpi_blacklisted()) { 1678 if (acpi_force) { 1679 pr_warn("acpi=force override\n"); 1680 } else { 1681 pr_warn("Disabling ACPI support\n"); 1682 disable_acpi(); 1683 return 1; 1684 } 1685 } 1686 1687 /* 1688 * Process the Multiple APIC Description Table (MADT), if present 1689 */ 1690 early_acpi_process_madt(); 1691 1692 /* 1693 * Hardware-reduced ACPI mode initialization: 1694 */ 1695 acpi_reduced_hw_init(); 1696 1697 return 0; 1698 } 1699 1700 int __init acpi_boot_init(void) 1701 { 1702 /* those are executed after early-quirks are executed */ 1703 dmi_check_system(acpi_dmi_table_late); 1704 1705 /* 1706 * If acpi_disabled, bail out 1707 */ 1708 if (acpi_disabled) 1709 return 1; 1710 1711 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1712 1713 /* 1714 * set sci_int and PM timer address 1715 */ 1716 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1717 1718 /* 1719 * Process the Multiple APIC Description Table (MADT), if present 1720 */ 1721 acpi_process_madt(); 1722 1723 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1724 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1725 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1726 1727 if (!acpi_noirq) 1728 x86_init.pci.init = pci_acpi_init; 1729 1730 /* Do not enable ACPI SPCR console by default */ 1731 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1732 return 0; 1733 } 1734 1735 static int __init parse_acpi(char *arg) 1736 { 1737 if (!arg) 1738 return -EINVAL; 1739 1740 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1741 if (strcmp(arg, "off") == 0) { 1742 disable_acpi(); 1743 } 1744 /* acpi=force to over-ride black-list */ 1745 else if (strcmp(arg, "force") == 0) { 1746 acpi_force = 1; 1747 acpi_disabled = 0; 1748 } 1749 /* acpi=strict disables out-of-spec workarounds */ 1750 else if (strcmp(arg, "strict") == 0) { 1751 acpi_strict = 1; 1752 } 1753 /* acpi=rsdt use RSDT instead of XSDT */ 1754 else if (strcmp(arg, "rsdt") == 0) { 1755 acpi_gbl_do_not_use_xsdt = TRUE; 1756 } 1757 /* "acpi=noirq" disables ACPI interrupt routing */ 1758 else if (strcmp(arg, "noirq") == 0) { 1759 acpi_noirq_set(); 1760 } 1761 /* "acpi=copy_dsdt" copies DSDT */ 1762 else if (strcmp(arg, "copy_dsdt") == 0) { 1763 acpi_gbl_copy_dsdt_locally = 1; 1764 } 1765 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1766 else if (strcmp(arg, "nocmcff") == 0) { 1767 acpi_disable_cmcff = 1; 1768 } else { 1769 /* Core will printk when we return error. */ 1770 return -EINVAL; 1771 } 1772 return 0; 1773 } 1774 early_param("acpi", parse_acpi); 1775 1776 static int __init parse_acpi_bgrt(char *arg) 1777 { 1778 acpi_nobgrt = true; 1779 return 0; 1780 } 1781 early_param("bgrt_disable", parse_acpi_bgrt); 1782 1783 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1784 static int __init parse_pci(char *arg) 1785 { 1786 if (arg && strcmp(arg, "noacpi") == 0) 1787 acpi_disable_pci(); 1788 return 0; 1789 } 1790 early_param("pci", parse_pci); 1791 1792 int __init acpi_mps_check(void) 1793 { 1794 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1795 /* mptable code is not built-in*/ 1796 if (acpi_disabled || acpi_noirq) { 1797 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1798 return 1; 1799 } 1800 #endif 1801 return 0; 1802 } 1803 1804 #ifdef CONFIG_X86_IO_APIC 1805 static int __init parse_acpi_skip_timer_override(char *arg) 1806 { 1807 acpi_skip_timer_override = 1; 1808 return 0; 1809 } 1810 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1811 1812 static int __init parse_acpi_use_timer_override(char *arg) 1813 { 1814 acpi_use_timer_override = 1; 1815 return 0; 1816 } 1817 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1818 #endif /* CONFIG_X86_IO_APIC */ 1819 1820 static int __init setup_acpi_sci(char *s) 1821 { 1822 if (!s) 1823 return -EINVAL; 1824 if (!strcmp(s, "edge")) 1825 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1826 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1827 else if (!strcmp(s, "level")) 1828 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1829 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1830 else if (!strcmp(s, "high")) 1831 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1832 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1833 else if (!strcmp(s, "low")) 1834 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1835 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1836 else 1837 return -EINVAL; 1838 return 0; 1839 } 1840 early_param("acpi_sci", setup_acpi_sci); 1841 1842 int __acpi_acquire_global_lock(unsigned int *lock) 1843 { 1844 unsigned int old, new, val; 1845 do { 1846 old = *lock; 1847 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1848 val = cmpxchg(lock, old, new); 1849 } while (unlikely (val != old)); 1850 return ((new & 0x3) < 3) ? -1 : 0; 1851 } 1852 1853 int __acpi_release_global_lock(unsigned int *lock) 1854 { 1855 unsigned int old, new, val; 1856 do { 1857 old = *lock; 1858 new = old & ~0x3; 1859 val = cmpxchg(lock, old, new); 1860 } while (unlikely (val != old)); 1861 return old & 0x1; 1862 } 1863 1864 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1865 { 1866 e820__range_add(addr, size, E820_TYPE_ACPI); 1867 e820__update_table_print(); 1868 } 1869 1870 void x86_default_set_root_pointer(u64 addr) 1871 { 1872 boot_params.acpi_rsdp_addr = addr; 1873 } 1874 1875 u64 x86_default_get_root_pointer(void) 1876 { 1877 return boot_params.acpi_rsdp_addr; 1878 } 1879