1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 4 * 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 7 */ 8 #define pr_fmt(fmt) "ACPI: " fmt 9 10 #include <linux/init.h> 11 #include <linux/acpi.h> 12 #include <linux/acpi_pmtmr.h> 13 #include <linux/efi.h> 14 #include <linux/cpumask.h> 15 #include <linux/export.h> 16 #include <linux/dmi.h> 17 #include <linux/irq.h> 18 #include <linux/slab.h> 19 #include <linux/memblock.h> 20 #include <linux/ioport.h> 21 #include <linux/pci.h> 22 #include <linux/efi-bgrt.h> 23 #include <linux/serial_core.h> 24 #include <linux/pgtable.h> 25 26 #include <asm/e820/api.h> 27 #include <asm/irqdomain.h> 28 #include <asm/pci_x86.h> 29 #include <asm/io_apic.h> 30 #include <asm/apic.h> 31 #include <asm/io.h> 32 #include <asm/mpspec.h> 33 #include <asm/smp.h> 34 #include <asm/i8259.h> 35 #include <asm/setup.h> 36 37 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 38 static int __initdata acpi_force = 0; 39 int acpi_disabled; 40 EXPORT_SYMBOL(acpi_disabled); 41 42 #ifdef CONFIG_X86_64 43 # include <asm/proto.h> 44 #endif /* X86 */ 45 46 int acpi_noirq; /* skip ACPI IRQ initialization */ 47 static int acpi_nobgrt; /* skip ACPI BGRT */ 48 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 49 EXPORT_SYMBOL(acpi_pci_disabled); 50 51 int acpi_lapic; 52 int acpi_ioapic; 53 int acpi_strict; 54 int acpi_disable_cmcff; 55 bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 56 57 /* ACPI SCI override configuration */ 58 u8 acpi_sci_flags __initdata; 59 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 60 int acpi_skip_timer_override __initdata; 61 int acpi_use_timer_override __initdata; 62 int acpi_fix_pin2_polarity __initdata; 63 64 #ifdef CONFIG_X86_LOCAL_APIC 65 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 66 static bool has_lapic_cpus __initdata; 67 static bool acpi_support_online_capable; 68 #endif 69 70 #ifdef CONFIG_X86_64 71 /* Physical address of the Multiprocessor Wakeup Structure mailbox */ 72 static u64 acpi_mp_wake_mailbox_paddr; 73 /* Virtual address of the Multiprocessor Wakeup Structure mailbox */ 74 static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox; 75 #endif 76 77 #ifdef CONFIG_X86_IO_APIC 78 /* 79 * Locks related to IOAPIC hotplug 80 * Hotplug side: 81 * ->device_hotplug_lock 82 * ->acpi_ioapic_lock 83 * ->ioapic_lock 84 * Interrupt mapping side: 85 * ->acpi_ioapic_lock 86 * ->ioapic_mutex 87 * ->ioapic_lock 88 */ 89 static DEFINE_MUTEX(acpi_ioapic_lock); 90 #endif 91 92 /* -------------------------------------------------------------------------- 93 Boot-time Configuration 94 -------------------------------------------------------------------------- */ 95 96 /* 97 * The default interrupt routing model is PIC (8259). This gets 98 * overridden if IOAPICs are enumerated (below). 99 */ 100 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 101 102 103 /* 104 * ISA irqs by default are the first 16 gsis but can be 105 * any gsi as specified by an interrupt source override. 106 */ 107 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 109 }; 110 111 /* 112 * This is just a simple wrapper around early_memremap(), 113 * with sanity checks for phys == 0 and size == 0. 114 */ 115 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 116 { 117 118 if (!phys || !size) 119 return NULL; 120 121 return early_memremap(phys, size); 122 } 123 124 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 125 { 126 if (!map || !size) 127 return; 128 129 early_memunmap(map, size); 130 } 131 132 #ifdef CONFIG_X86_LOCAL_APIC 133 static int __init acpi_parse_madt(struct acpi_table_header *table) 134 { 135 struct acpi_table_madt *madt = NULL; 136 137 if (!boot_cpu_has(X86_FEATURE_APIC)) 138 return -EINVAL; 139 140 madt = (struct acpi_table_madt *)table; 141 if (!madt) { 142 pr_warn("Unable to map MADT\n"); 143 return -ENODEV; 144 } 145 146 if (madt->address) { 147 acpi_lapic_addr = (u64) madt->address; 148 149 pr_debug("Local APIC address 0x%08x\n", madt->address); 150 } 151 152 if (madt->flags & ACPI_MADT_PCAT_COMPAT) 153 legacy_pic_pcat_compat(); 154 155 /* ACPI 6.3 and newer support the online capable bit. */ 156 if (acpi_gbl_FADT.header.revision > 6 || 157 (acpi_gbl_FADT.header.revision == 6 && 158 acpi_gbl_FADT.minor_revision >= 3)) 159 acpi_support_online_capable = true; 160 161 default_acpi_madt_oem_check(madt->header.oem_id, 162 madt->header.oem_table_id); 163 164 return 0; 165 } 166 167 /** 168 * acpi_register_lapic - register a local apic and generates a logic cpu number 169 * @id: local apic id to register 170 * @acpiid: ACPI id to register 171 * @enabled: this cpu is enabled or not 172 * 173 * Returns the logic cpu number which maps to the local apic 174 */ 175 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 176 { 177 int cpu; 178 179 if (id >= MAX_LOCAL_APIC) { 180 pr_info("skipped apicid that is too big\n"); 181 return -EINVAL; 182 } 183 184 if (!enabled) { 185 ++disabled_cpus; 186 return -EINVAL; 187 } 188 189 cpu = generic_processor_info(id); 190 if (cpu >= 0) 191 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 192 193 return cpu; 194 } 195 196 static bool __init acpi_is_processor_usable(u32 lapic_flags) 197 { 198 if (lapic_flags & ACPI_MADT_ENABLED) 199 return true; 200 201 if (!acpi_support_online_capable || 202 (lapic_flags & ACPI_MADT_ONLINE_CAPABLE)) 203 return true; 204 205 return false; 206 } 207 208 static int __init 209 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 210 { 211 struct acpi_madt_local_x2apic *processor = NULL; 212 #ifdef CONFIG_X86_X2APIC 213 u32 apic_id; 214 u8 enabled; 215 #endif 216 217 processor = (struct acpi_madt_local_x2apic *)header; 218 219 if (BAD_MADT_ENTRY(processor, end)) 220 return -EINVAL; 221 222 acpi_table_print_madt_entry(&header->common); 223 224 #ifdef CONFIG_X86_X2APIC 225 apic_id = processor->local_apic_id; 226 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 227 228 /* Ignore invalid ID */ 229 if (apic_id == 0xffffffff) 230 return 0; 231 232 /* don't register processors that cannot be onlined */ 233 if (!acpi_is_processor_usable(processor->lapic_flags)) 234 return 0; 235 236 /* 237 * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure 238 * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID 239 * in x2APIC must be equal or greater than 0xff. 240 */ 241 if (has_lapic_cpus && apic_id < 0xff) 242 return 0; 243 244 /* 245 * We need to register disabled CPU as well to permit 246 * counting disabled CPUs. This allows us to size 247 * cpus_possible_map more accurately, to permit 248 * to not preallocating memory for all NR_CPUS 249 * when we use CPU hotplug. 250 */ 251 if (!apic_id_valid(apic_id)) { 252 if (enabled) 253 pr_warn("x2apic entry ignored\n"); 254 return 0; 255 } 256 257 acpi_register_lapic(apic_id, processor->uid, enabled); 258 #else 259 pr_warn("x2apic entry ignored\n"); 260 #endif 261 262 return 0; 263 } 264 265 static int __init 266 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 267 { 268 struct acpi_madt_local_apic *processor = NULL; 269 270 processor = (struct acpi_madt_local_apic *)header; 271 272 if (BAD_MADT_ENTRY(processor, end)) 273 return -EINVAL; 274 275 acpi_table_print_madt_entry(&header->common); 276 277 /* Ignore invalid ID */ 278 if (processor->id == 0xff) 279 return 0; 280 281 /* don't register processors that can not be onlined */ 282 if (!acpi_is_processor_usable(processor->lapic_flags)) 283 return 0; 284 285 /* 286 * We need to register disabled CPU as well to permit 287 * counting disabled CPUs. This allows us to size 288 * cpus_possible_map more accurately, to permit 289 * to not preallocating memory for all NR_CPUS 290 * when we use CPU hotplug. 291 */ 292 acpi_register_lapic(processor->id, /* APIC ID */ 293 processor->processor_id, /* ACPI ID */ 294 processor->lapic_flags & ACPI_MADT_ENABLED); 295 296 has_lapic_cpus = true; 297 return 0; 298 } 299 300 static int __init 301 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 302 { 303 struct acpi_madt_local_sapic *processor = NULL; 304 305 processor = (struct acpi_madt_local_sapic *)header; 306 307 if (BAD_MADT_ENTRY(processor, end)) 308 return -EINVAL; 309 310 acpi_table_print_madt_entry(&header->common); 311 312 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 313 processor->processor_id, /* ACPI ID */ 314 processor->lapic_flags & ACPI_MADT_ENABLED); 315 316 return 0; 317 } 318 319 static int __init 320 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 321 const unsigned long end) 322 { 323 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 324 325 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 326 327 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 328 return -EINVAL; 329 330 acpi_table_print_madt_entry(&header->common); 331 332 acpi_lapic_addr = lapic_addr_ovr->address; 333 334 return 0; 335 } 336 337 static int __init 338 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 339 const unsigned long end) 340 { 341 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 342 343 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 344 345 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 346 return -EINVAL; 347 348 acpi_table_print_madt_entry(&header->common); 349 350 if (x2apic_nmi->lint != 1) 351 pr_warn("NMI not connected to LINT 1!\n"); 352 353 return 0; 354 } 355 356 static int __init 357 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 358 { 359 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 360 361 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 362 363 if (BAD_MADT_ENTRY(lapic_nmi, end)) 364 return -EINVAL; 365 366 acpi_table_print_madt_entry(&header->common); 367 368 if (lapic_nmi->lint != 1) 369 pr_warn("NMI not connected to LINT 1!\n"); 370 371 return 0; 372 } 373 374 #ifdef CONFIG_X86_64 375 static int acpi_wakeup_cpu(u32 apicid, unsigned long start_ip) 376 { 377 /* 378 * Remap mailbox memory only for the first call to acpi_wakeup_cpu(). 379 * 380 * Wakeup of secondary CPUs is fully serialized in the core code. 381 * No need to protect acpi_mp_wake_mailbox from concurrent accesses. 382 */ 383 if (!acpi_mp_wake_mailbox) { 384 acpi_mp_wake_mailbox = memremap(acpi_mp_wake_mailbox_paddr, 385 sizeof(*acpi_mp_wake_mailbox), 386 MEMREMAP_WB); 387 } 388 389 /* 390 * Mailbox memory is shared between the firmware and OS. Firmware will 391 * listen on mailbox command address, and once it receives the wakeup 392 * command, the CPU associated with the given apicid will be booted. 393 * 394 * The value of 'apic_id' and 'wakeup_vector' must be visible to the 395 * firmware before the wakeup command is visible. smp_store_release() 396 * ensures ordering and visibility. 397 */ 398 acpi_mp_wake_mailbox->apic_id = apicid; 399 acpi_mp_wake_mailbox->wakeup_vector = start_ip; 400 smp_store_release(&acpi_mp_wake_mailbox->command, 401 ACPI_MP_WAKE_COMMAND_WAKEUP); 402 403 /* 404 * Wait for the CPU to wake up. 405 * 406 * The CPU being woken up is essentially in a spin loop waiting to be 407 * woken up. It should not take long for it wake up and acknowledge by 408 * zeroing out ->command. 409 * 410 * ACPI specification doesn't provide any guidance on how long kernel 411 * has to wait for a wake up acknowledgement. It also doesn't provide 412 * a way to cancel a wake up request if it takes too long. 413 * 414 * In TDX environment, the VMM has control over how long it takes to 415 * wake up secondary. It can postpone scheduling secondary vCPU 416 * indefinitely. Giving up on wake up request and reporting error opens 417 * possible attack vector for VMM: it can wake up a secondary CPU when 418 * kernel doesn't expect it. Wait until positive result of the wake up 419 * request. 420 */ 421 while (READ_ONCE(acpi_mp_wake_mailbox->command)) 422 cpu_relax(); 423 424 return 0; 425 } 426 #endif /* CONFIG_X86_64 */ 427 #endif /* CONFIG_X86_LOCAL_APIC */ 428 429 #ifdef CONFIG_X86_IO_APIC 430 #define MP_ISA_BUS 0 431 432 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 433 u8 trigger, u32 gsi); 434 435 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 436 u32 gsi) 437 { 438 /* 439 * Check bus_irq boundary. 440 */ 441 if (bus_irq >= NR_IRQS_LEGACY) { 442 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 443 return; 444 } 445 446 /* 447 * TBD: This check is for faulty timer entries, where the override 448 * erroneously sets the trigger to level, resulting in a HUGE 449 * increase of timer interrupts! 450 */ 451 if ((bus_irq == 0) && (trigger == 3)) 452 trigger = 1; 453 454 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 455 return; 456 /* 457 * Reset default identity mapping if gsi is also an legacy IRQ, 458 * otherwise there will be more than one entry with the same GSI 459 * and acpi_isa_irq_to_gsi() may give wrong result. 460 */ 461 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 462 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 463 isa_irq_to_gsi[bus_irq] = gsi; 464 } 465 466 static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 467 int polarity) 468 { 469 #ifdef CONFIG_X86_MPPARSE 470 struct mpc_intsrc mp_irq; 471 struct pci_dev *pdev; 472 unsigned char number; 473 unsigned int devfn; 474 int ioapic; 475 u8 pin; 476 477 if (!acpi_ioapic) 478 return; 479 if (!dev || !dev_is_pci(dev)) 480 return; 481 482 pdev = to_pci_dev(dev); 483 number = pdev->bus->number; 484 devfn = pdev->devfn; 485 pin = pdev->pin; 486 /* print the entry should happen on mptable identically */ 487 mp_irq.type = MP_INTSRC; 488 mp_irq.irqtype = mp_INT; 489 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 490 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 491 mp_irq.srcbus = number; 492 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 493 ioapic = mp_find_ioapic(gsi); 494 mp_irq.dstapic = mpc_ioapic_id(ioapic); 495 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 496 497 mp_save_irq(&mp_irq); 498 #endif 499 } 500 501 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 502 u8 trigger, u32 gsi) 503 { 504 struct mpc_intsrc mp_irq; 505 int ioapic, pin; 506 507 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 508 ioapic = mp_find_ioapic(gsi); 509 if (ioapic < 0) { 510 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 511 return ioapic; 512 } 513 514 pin = mp_find_ioapic_pin(ioapic, gsi); 515 516 mp_irq.type = MP_INTSRC; 517 mp_irq.irqtype = mp_INT; 518 mp_irq.irqflag = (trigger << 2) | polarity; 519 mp_irq.srcbus = MP_ISA_BUS; 520 mp_irq.srcbusirq = bus_irq; 521 mp_irq.dstapic = mpc_ioapic_id(ioapic); 522 mp_irq.dstirq = pin; 523 524 mp_save_irq(&mp_irq); 525 526 return 0; 527 } 528 529 static int __init 530 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 531 { 532 struct acpi_madt_io_apic *ioapic = NULL; 533 struct ioapic_domain_cfg cfg = { 534 .type = IOAPIC_DOMAIN_DYNAMIC, 535 .ops = &mp_ioapic_irqdomain_ops, 536 }; 537 538 ioapic = (struct acpi_madt_io_apic *)header; 539 540 if (BAD_MADT_ENTRY(ioapic, end)) 541 return -EINVAL; 542 543 acpi_table_print_madt_entry(&header->common); 544 545 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 546 if (ioapic->global_irq_base < nr_legacy_irqs()) 547 cfg.type = IOAPIC_DOMAIN_LEGACY; 548 549 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 550 &cfg); 551 552 return 0; 553 } 554 555 /* 556 * Parse Interrupt Source Override for the ACPI SCI 557 */ 558 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 559 { 560 if (trigger == 0) /* compatible SCI trigger is level */ 561 trigger = 3; 562 563 if (polarity == 0) /* compatible SCI polarity is low */ 564 polarity = 3; 565 566 /* Command-line over-ride via acpi_sci= */ 567 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 568 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 569 570 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 571 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 572 573 if (bus_irq < NR_IRQS_LEGACY) 574 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 575 else 576 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 577 578 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 579 580 /* 581 * stash over-ride to indicate we've been here 582 * and for later update of acpi_gbl_FADT 583 */ 584 acpi_sci_override_gsi = gsi; 585 return; 586 } 587 588 static int __init 589 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 590 const unsigned long end) 591 { 592 struct acpi_madt_interrupt_override *intsrc = NULL; 593 594 intsrc = (struct acpi_madt_interrupt_override *)header; 595 596 if (BAD_MADT_ENTRY(intsrc, end)) 597 return -EINVAL; 598 599 acpi_table_print_madt_entry(&header->common); 600 601 if (intsrc->source_irq < NR_IRQS_LEGACY) 602 acpi_int_src_ovr[intsrc->source_irq] = true; 603 604 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 605 acpi_sci_ioapic_setup(intsrc->source_irq, 606 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 607 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 608 intsrc->global_irq); 609 return 0; 610 } 611 612 if (intsrc->source_irq == 0) { 613 if (acpi_skip_timer_override) { 614 pr_warn("BIOS IRQ0 override ignored.\n"); 615 return 0; 616 } 617 618 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 619 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 620 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 621 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 622 } 623 } 624 625 mp_override_legacy_irq(intsrc->source_irq, 626 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 627 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 628 intsrc->global_irq); 629 630 return 0; 631 } 632 633 static int __init 634 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 635 { 636 struct acpi_madt_nmi_source *nmi_src = NULL; 637 638 nmi_src = (struct acpi_madt_nmi_source *)header; 639 640 if (BAD_MADT_ENTRY(nmi_src, end)) 641 return -EINVAL; 642 643 acpi_table_print_madt_entry(&header->common); 644 645 /* TBD: Support nimsrc entries? */ 646 647 return 0; 648 } 649 650 #endif /* CONFIG_X86_IO_APIC */ 651 652 /* 653 * acpi_pic_sci_set_trigger() 654 * 655 * use ELCR to set PIC-mode trigger type for SCI 656 * 657 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 658 * it may require Edge Trigger -- use "acpi_sci=edge" 659 * 660 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 661 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 662 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 663 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 664 */ 665 666 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 667 { 668 unsigned int mask = 1 << irq; 669 unsigned int old, new; 670 671 /* Real old ELCR mask */ 672 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 673 674 /* 675 * If we use ACPI to set PCI IRQs, then we should clear ELCR 676 * since we will set it correctly as we enable the PCI irq 677 * routing. 678 */ 679 new = acpi_noirq ? old : 0; 680 681 /* 682 * Update SCI information in the ELCR, it isn't in the PCI 683 * routing tables.. 684 */ 685 switch (trigger) { 686 case 1: /* Edge - clear */ 687 new &= ~mask; 688 break; 689 case 3: /* Level - set */ 690 new |= mask; 691 break; 692 } 693 694 if (old == new) 695 return; 696 697 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 698 outb(new, PIC_ELCR1); 699 outb(new >> 8, PIC_ELCR2); 700 } 701 702 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 703 { 704 int rc, irq, trigger, polarity; 705 706 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 707 *irqp = gsi; 708 return 0; 709 } 710 711 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 712 if (rc) 713 return rc; 714 715 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 716 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 717 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 718 if (irq < 0) 719 return irq; 720 721 *irqp = irq; 722 return 0; 723 } 724 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 725 726 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 727 { 728 if (isa_irq < nr_legacy_irqs() && 729 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 730 *gsi = isa_irq_to_gsi[isa_irq]; 731 return 0; 732 } 733 734 return -1; 735 } 736 737 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 738 int trigger, int polarity) 739 { 740 #ifdef CONFIG_PCI 741 /* 742 * Make sure all (legacy) PCI IRQs are set as level-triggered. 743 */ 744 if (trigger == ACPI_LEVEL_SENSITIVE) 745 elcr_set_level_irq(gsi); 746 #endif 747 748 return gsi; 749 } 750 751 #ifdef CONFIG_X86_LOCAL_APIC 752 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 753 int trigger, int polarity) 754 { 755 int irq = gsi; 756 #ifdef CONFIG_X86_IO_APIC 757 int node; 758 struct irq_alloc_info info; 759 760 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 761 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 762 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 763 ioapic_set_alloc_attr(&info, node, trigger, polarity); 764 765 mutex_lock(&acpi_ioapic_lock); 766 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 767 /* Don't set up the ACPI SCI because it's already set up */ 768 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 769 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 770 mutex_unlock(&acpi_ioapic_lock); 771 #endif 772 773 return irq; 774 } 775 776 static void acpi_unregister_gsi_ioapic(u32 gsi) 777 { 778 #ifdef CONFIG_X86_IO_APIC 779 int irq; 780 781 mutex_lock(&acpi_ioapic_lock); 782 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 783 if (irq > 0) 784 mp_unmap_irq(irq); 785 mutex_unlock(&acpi_ioapic_lock); 786 #endif 787 } 788 #endif 789 790 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 791 int trigger, int polarity) = acpi_register_gsi_pic; 792 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 793 794 #ifdef CONFIG_ACPI_SLEEP 795 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 796 #else 797 int (*acpi_suspend_lowlevel)(void); 798 #endif 799 800 /* 801 * success: return IRQ number (>=0) 802 * failure: return < 0 803 */ 804 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 805 { 806 return __acpi_register_gsi(dev, gsi, trigger, polarity); 807 } 808 EXPORT_SYMBOL_GPL(acpi_register_gsi); 809 810 void acpi_unregister_gsi(u32 gsi) 811 { 812 if (__acpi_unregister_gsi) 813 __acpi_unregister_gsi(gsi); 814 } 815 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 816 817 #ifdef CONFIG_X86_LOCAL_APIC 818 static void __init acpi_set_irq_model_ioapic(void) 819 { 820 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 821 __acpi_register_gsi = acpi_register_gsi_ioapic; 822 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 823 acpi_ioapic = 1; 824 } 825 #endif 826 827 /* 828 * ACPI based hotplug support for CPU 829 */ 830 #ifdef CONFIG_ACPI_HOTPLUG_CPU 831 #include <acpi/processor.h> 832 833 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 834 { 835 #ifdef CONFIG_ACPI_NUMA 836 int nid; 837 838 nid = acpi_get_node(handle); 839 if (nid != NUMA_NO_NODE) { 840 set_apicid_to_node(physid, nid); 841 numa_set_node(cpu, nid); 842 } 843 #endif 844 return 0; 845 } 846 847 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 848 int *pcpu) 849 { 850 int cpu; 851 852 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 853 if (cpu < 0) { 854 pr_info("Unable to map lapic to logical cpu number\n"); 855 return cpu; 856 } 857 858 acpi_processor_set_pdc(handle); 859 acpi_map_cpu2node(handle, cpu, physid); 860 861 *pcpu = cpu; 862 return 0; 863 } 864 EXPORT_SYMBOL(acpi_map_cpu); 865 866 int acpi_unmap_cpu(int cpu) 867 { 868 #ifdef CONFIG_ACPI_NUMA 869 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 870 #endif 871 872 per_cpu(x86_cpu_to_apicid, cpu) = BAD_APICID; 873 set_cpu_present(cpu, false); 874 num_processors--; 875 876 return (0); 877 } 878 EXPORT_SYMBOL(acpi_unmap_cpu); 879 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 880 881 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 882 { 883 int ret = -ENOSYS; 884 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 885 int ioapic_id; 886 u64 addr; 887 struct ioapic_domain_cfg cfg = { 888 .type = IOAPIC_DOMAIN_DYNAMIC, 889 .ops = &mp_ioapic_irqdomain_ops, 890 }; 891 892 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 893 if (ioapic_id < 0) { 894 unsigned long long uid; 895 acpi_status status; 896 897 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 898 NULL, &uid); 899 if (ACPI_FAILURE(status)) { 900 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 901 return -EINVAL; 902 } 903 ioapic_id = (int)uid; 904 } 905 906 mutex_lock(&acpi_ioapic_lock); 907 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 908 mutex_unlock(&acpi_ioapic_lock); 909 #endif 910 911 return ret; 912 } 913 EXPORT_SYMBOL(acpi_register_ioapic); 914 915 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 916 { 917 int ret = -ENOSYS; 918 919 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 920 mutex_lock(&acpi_ioapic_lock); 921 ret = mp_unregister_ioapic(gsi_base); 922 mutex_unlock(&acpi_ioapic_lock); 923 #endif 924 925 return ret; 926 } 927 EXPORT_SYMBOL(acpi_unregister_ioapic); 928 929 /** 930 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 931 * has been registered 932 * @handle: ACPI handle of the IOAPIC device 933 * @gsi_base: GSI base associated with the IOAPIC 934 * 935 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 936 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 937 */ 938 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 939 { 940 int ret = 0; 941 942 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 943 mutex_lock(&acpi_ioapic_lock); 944 ret = mp_ioapic_registered(gsi_base); 945 mutex_unlock(&acpi_ioapic_lock); 946 #endif 947 948 return ret; 949 } 950 951 static int __init acpi_parse_sbf(struct acpi_table_header *table) 952 { 953 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 954 955 sbf_port = sb->cmos_index; /* Save CMOS port */ 956 957 return 0; 958 } 959 960 #ifdef CONFIG_HPET_TIMER 961 #include <asm/hpet.h> 962 963 static struct resource *hpet_res __initdata; 964 965 static int __init acpi_parse_hpet(struct acpi_table_header *table) 966 { 967 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 968 969 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 970 pr_warn("HPET timers must be located in memory.\n"); 971 return -1; 972 } 973 974 hpet_address = hpet_tbl->address.address; 975 hpet_blockid = hpet_tbl->sequence; 976 977 /* 978 * Some broken BIOSes advertise HPET at 0x0. We really do not 979 * want to allocate a resource there. 980 */ 981 if (!hpet_address) { 982 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 983 return 0; 984 } 985 #ifdef CONFIG_X86_64 986 /* 987 * Some even more broken BIOSes advertise HPET at 988 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 989 * some noise: 990 */ 991 if (hpet_address == 0xfed0000000000000UL) { 992 if (!hpet_force_user) { 993 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 994 hpet_tbl->id); 995 hpet_address = 0; 996 return 0; 997 } 998 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 999 hpet_tbl->id); 1000 hpet_address >>= 32; 1001 } 1002 #endif 1003 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 1004 1005 /* 1006 * Allocate and initialize the HPET firmware resource for adding into 1007 * the resource tree during the lateinit timeframe. 1008 */ 1009 #define HPET_RESOURCE_NAME_SIZE 9 1010 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 1011 SMP_CACHE_BYTES); 1012 if (!hpet_res) 1013 panic("%s: Failed to allocate %zu bytes\n", __func__, 1014 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 1015 1016 hpet_res->name = (void *)&hpet_res[1]; 1017 hpet_res->flags = IORESOURCE_MEM; 1018 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 1019 hpet_tbl->sequence); 1020 1021 hpet_res->start = hpet_address; 1022 hpet_res->end = hpet_address + (1 * 1024) - 1; 1023 1024 return 0; 1025 } 1026 1027 /* 1028 * hpet_insert_resource inserts the HPET resources used into the resource 1029 * tree. 1030 */ 1031 static __init int hpet_insert_resource(void) 1032 { 1033 if (!hpet_res) 1034 return 1; 1035 1036 return insert_resource(&iomem_resource, hpet_res); 1037 } 1038 1039 late_initcall(hpet_insert_resource); 1040 1041 #else 1042 #define acpi_parse_hpet NULL 1043 #endif 1044 1045 static int __init acpi_parse_fadt(struct acpi_table_header *table) 1046 { 1047 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 1048 pr_debug("no legacy devices present\n"); 1049 x86_platform.legacy.devices.pnpbios = 0; 1050 } 1051 1052 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 1053 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 1054 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 1055 pr_debug("i8042 controller is absent\n"); 1056 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 1057 } 1058 1059 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 1060 pr_debug("not registering RTC platform device\n"); 1061 x86_platform.legacy.rtc = 0; 1062 } 1063 1064 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 1065 pr_debug("probing for VGA not safe\n"); 1066 x86_platform.legacy.no_vga = 1; 1067 } 1068 1069 #ifdef CONFIG_X86_PM_TIMER 1070 /* detect the location of the ACPI PM Timer */ 1071 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 1072 /* FADT rev. 2 */ 1073 if (acpi_gbl_FADT.xpm_timer_block.space_id != 1074 ACPI_ADR_SPACE_SYSTEM_IO) 1075 return 0; 1076 1077 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1078 /* 1079 * "X" fields are optional extensions to the original V1.0 1080 * fields, so we must selectively expand V1.0 fields if the 1081 * corresponding X field is zero. 1082 */ 1083 if (!pmtmr_ioport) 1084 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1085 } else { 1086 /* FADT rev. 1 */ 1087 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1088 } 1089 if (pmtmr_ioport) 1090 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 1091 #endif 1092 return 0; 1093 } 1094 1095 #ifdef CONFIG_X86_LOCAL_APIC 1096 /* 1097 * Parse LAPIC entries in MADT 1098 * returns 0 on success, < 0 on error 1099 */ 1100 1101 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1102 { 1103 int count; 1104 1105 if (!boot_cpu_has(X86_FEATURE_APIC)) 1106 return -ENODEV; 1107 1108 /* 1109 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1110 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1111 */ 1112 1113 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1114 acpi_parse_lapic_addr_ovr, 0); 1115 if (count < 0) { 1116 pr_err("Error parsing LAPIC address override entry\n"); 1117 return count; 1118 } 1119 1120 register_lapic_address(acpi_lapic_addr); 1121 1122 return count; 1123 } 1124 1125 static int __init acpi_parse_madt_lapic_entries(void) 1126 { 1127 int count, x2count = 0; 1128 1129 if (!boot_cpu_has(X86_FEATURE_APIC)) 1130 return -ENODEV; 1131 1132 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1133 acpi_parse_sapic, MAX_LOCAL_APIC); 1134 1135 if (!count) { 1136 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 1137 acpi_parse_lapic, MAX_LOCAL_APIC); 1138 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 1139 acpi_parse_x2apic, MAX_LOCAL_APIC); 1140 } 1141 if (!count && !x2count) { 1142 pr_err("No LAPIC entries present\n"); 1143 /* TBD: Cleanup to allow fallback to MPS */ 1144 return -ENODEV; 1145 } else if (count < 0 || x2count < 0) { 1146 pr_err("Error parsing LAPIC entry\n"); 1147 /* TBD: Cleanup to allow fallback to MPS */ 1148 return count; 1149 } 1150 1151 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1152 acpi_parse_x2apic_nmi, 0); 1153 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1154 acpi_parse_lapic_nmi, 0); 1155 if (count < 0 || x2count < 0) { 1156 pr_err("Error parsing LAPIC NMI entry\n"); 1157 /* TBD: Cleanup to allow fallback to MPS */ 1158 return count; 1159 } 1160 return 0; 1161 } 1162 1163 #ifdef CONFIG_X86_64 1164 static int __init acpi_parse_mp_wake(union acpi_subtable_headers *header, 1165 const unsigned long end) 1166 { 1167 struct acpi_madt_multiproc_wakeup *mp_wake; 1168 1169 if (!IS_ENABLED(CONFIG_SMP)) 1170 return -ENODEV; 1171 1172 mp_wake = (struct acpi_madt_multiproc_wakeup *)header; 1173 if (BAD_MADT_ENTRY(mp_wake, end)) 1174 return -EINVAL; 1175 1176 acpi_table_print_madt_entry(&header->common); 1177 1178 acpi_mp_wake_mailbox_paddr = mp_wake->base_address; 1179 1180 apic_update_callback(wakeup_secondary_cpu_64, acpi_wakeup_cpu); 1181 1182 return 0; 1183 } 1184 #endif /* CONFIG_X86_64 */ 1185 #endif /* CONFIG_X86_LOCAL_APIC */ 1186 1187 #ifdef CONFIG_X86_IO_APIC 1188 static void __init mp_config_acpi_legacy_irqs(void) 1189 { 1190 int i; 1191 struct mpc_intsrc mp_irq; 1192 1193 #ifdef CONFIG_EISA 1194 /* 1195 * Fabricate the legacy ISA bus (bus #31). 1196 */ 1197 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1198 #endif 1199 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1200 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1201 1202 /* 1203 * Use the default configuration for the IRQs 0-15. Unless 1204 * overridden by (MADT) interrupt source override entries. 1205 */ 1206 for (i = 0; i < nr_legacy_irqs(); i++) { 1207 int ioapic, pin; 1208 unsigned int dstapic; 1209 int idx; 1210 u32 gsi; 1211 1212 /* Locate the gsi that irq i maps to. */ 1213 if (acpi_isa_irq_to_gsi(i, &gsi)) 1214 continue; 1215 1216 /* 1217 * Locate the IOAPIC that manages the ISA IRQ. 1218 */ 1219 ioapic = mp_find_ioapic(gsi); 1220 if (ioapic < 0) 1221 continue; 1222 pin = mp_find_ioapic_pin(ioapic, gsi); 1223 dstapic = mpc_ioapic_id(ioapic); 1224 1225 for (idx = 0; idx < mp_irq_entries; idx++) { 1226 struct mpc_intsrc *irq = mp_irqs + idx; 1227 1228 /* Do we already have a mapping for this ISA IRQ? */ 1229 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1230 break; 1231 1232 /* Do we already have a mapping for this IOAPIC pin */ 1233 if (irq->dstapic == dstapic && irq->dstirq == pin) 1234 break; 1235 } 1236 1237 if (idx != mp_irq_entries) { 1238 pr_debug("ACPI: IRQ%d used by override.\n", i); 1239 continue; /* IRQ already used */ 1240 } 1241 1242 mp_irq.type = MP_INTSRC; 1243 mp_irq.irqflag = 0; /* Conforming */ 1244 mp_irq.srcbus = MP_ISA_BUS; 1245 mp_irq.dstapic = dstapic; 1246 mp_irq.irqtype = mp_INT; 1247 mp_irq.srcbusirq = i; /* Identity mapped */ 1248 mp_irq.dstirq = pin; 1249 1250 mp_save_irq(&mp_irq); 1251 } 1252 } 1253 1254 /* 1255 * Parse IOAPIC related entries in MADT 1256 * returns 0 on success, < 0 on error 1257 */ 1258 static int __init acpi_parse_madt_ioapic_entries(void) 1259 { 1260 int count; 1261 1262 /* 1263 * ACPI interpreter is required to complete interrupt setup, 1264 * so if it is off, don't enumerate the io-apics with ACPI. 1265 * If MPS is present, it will handle them, 1266 * otherwise the system will stay in PIC mode 1267 */ 1268 if (acpi_disabled || acpi_noirq) 1269 return -ENODEV; 1270 1271 if (!boot_cpu_has(X86_FEATURE_APIC)) 1272 return -ENODEV; 1273 1274 /* 1275 * if "noapic" boot option, don't look for IO-APICs 1276 */ 1277 if (ioapic_is_disabled) { 1278 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1279 return -ENODEV; 1280 } 1281 1282 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1283 MAX_IO_APICS); 1284 if (!count) { 1285 pr_err("No IOAPIC entries present\n"); 1286 return -ENODEV; 1287 } else if (count < 0) { 1288 pr_err("Error parsing IOAPIC entry\n"); 1289 return count; 1290 } 1291 1292 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1293 acpi_parse_int_src_ovr, nr_irqs); 1294 if (count < 0) { 1295 pr_err("Error parsing interrupt source overrides entry\n"); 1296 /* TBD: Cleanup to allow fallback to MPS */ 1297 return count; 1298 } 1299 1300 /* 1301 * If BIOS did not supply an INT_SRC_OVR for the SCI 1302 * pretend we got one so we can set the SCI flags. 1303 * But ignore setting up SCI on hardware reduced platforms. 1304 */ 1305 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1306 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1307 acpi_gbl_FADT.sci_interrupt); 1308 1309 /* Fill in identity legacy mappings where no override */ 1310 mp_config_acpi_legacy_irqs(); 1311 1312 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1313 acpi_parse_nmi_src, nr_irqs); 1314 if (count < 0) { 1315 pr_err("Error parsing NMI SRC entry\n"); 1316 /* TBD: Cleanup to allow fallback to MPS */ 1317 return count; 1318 } 1319 1320 return 0; 1321 } 1322 #else 1323 static inline int acpi_parse_madt_ioapic_entries(void) 1324 { 1325 return -1; 1326 } 1327 #endif /* !CONFIG_X86_IO_APIC */ 1328 1329 static void __init early_acpi_process_madt(void) 1330 { 1331 #ifdef CONFIG_X86_LOCAL_APIC 1332 int error; 1333 1334 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1335 1336 /* 1337 * Parse MADT LAPIC entries 1338 */ 1339 error = early_acpi_parse_madt_lapic_addr_ovr(); 1340 if (!error) { 1341 acpi_lapic = 1; 1342 smp_found_config = 1; 1343 } 1344 if (error == -EINVAL) { 1345 /* 1346 * Dell Precision Workstation 410, 610 come here. 1347 */ 1348 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1349 disable_acpi(); 1350 } 1351 } 1352 #endif 1353 } 1354 1355 static void __init acpi_process_madt(void) 1356 { 1357 #ifdef CONFIG_X86_LOCAL_APIC 1358 int error; 1359 1360 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1361 1362 /* 1363 * Parse MADT LAPIC entries 1364 */ 1365 error = acpi_parse_madt_lapic_entries(); 1366 if (!error) { 1367 acpi_lapic = 1; 1368 1369 /* 1370 * Parse MADT IO-APIC entries 1371 */ 1372 mutex_lock(&acpi_ioapic_lock); 1373 error = acpi_parse_madt_ioapic_entries(); 1374 mutex_unlock(&acpi_ioapic_lock); 1375 if (!error) { 1376 acpi_set_irq_model_ioapic(); 1377 1378 smp_found_config = 1; 1379 } 1380 1381 #ifdef CONFIG_X86_64 1382 /* 1383 * Parse MADT MP Wake entry. 1384 */ 1385 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1386 acpi_parse_mp_wake, 1); 1387 #endif 1388 } 1389 if (error == -EINVAL) { 1390 /* 1391 * Dell Precision Workstation 410, 610 come here. 1392 */ 1393 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1394 disable_acpi(); 1395 } 1396 } else { 1397 /* 1398 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1399 * In the event an MPS table was found, forget it. 1400 * Boot with "acpi=off" to use MPS on such a system. 1401 */ 1402 if (smp_found_config) { 1403 pr_warn("No APIC-table, disabling MPS\n"); 1404 smp_found_config = 0; 1405 } 1406 } 1407 1408 /* 1409 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1410 * processors, where MPS only supports physical. 1411 */ 1412 if (acpi_lapic && acpi_ioapic) 1413 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1414 else if (acpi_lapic) 1415 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1416 #endif 1417 return; 1418 } 1419 1420 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1421 { 1422 if (!acpi_force) { 1423 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1424 acpi_noirq_set(); 1425 } 1426 return 0; 1427 } 1428 1429 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1430 { 1431 if (!acpi_force) { 1432 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1433 acpi_disable_pci(); 1434 } 1435 return 0; 1436 } 1437 1438 static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1439 { 1440 if (!acpi_force) { 1441 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1442 acpi_gbl_do_not_use_xsdt = TRUE; 1443 } else { 1444 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1445 } 1446 return 0; 1447 } 1448 1449 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1450 { 1451 if (!acpi_force) { 1452 pr_notice("%s detected: acpi off\n", d->ident); 1453 disable_acpi(); 1454 } else { 1455 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1456 } 1457 return 0; 1458 } 1459 1460 /* 1461 * Force ignoring BIOS IRQ0 override 1462 */ 1463 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1464 { 1465 if (!acpi_skip_timer_override) { 1466 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1467 d->ident); 1468 acpi_skip_timer_override = 1; 1469 } 1470 return 0; 1471 } 1472 1473 /* 1474 * ACPI offers an alternative platform interface model that removes 1475 * ACPI hardware requirements for platforms that do not implement 1476 * the PC Architecture. 1477 * 1478 * We initialize the Hardware-reduced ACPI model here: 1479 */ 1480 void __init acpi_generic_reduced_hw_init(void) 1481 { 1482 /* 1483 * Override x86_init functions and bypass legacy PIC in 1484 * hardware reduced ACPI mode. 1485 */ 1486 x86_init.timers.timer_init = x86_init_noop; 1487 x86_init.irqs.pre_vector_init = x86_init_noop; 1488 legacy_pic = &null_legacy_pic; 1489 } 1490 1491 static void __init acpi_reduced_hw_init(void) 1492 { 1493 if (acpi_gbl_reduced_hardware) 1494 x86_init.acpi.reduced_hw_early_init(); 1495 } 1496 1497 /* 1498 * If your system is blacklisted here, but you find that acpi=force 1499 * works for you, please contact linux-acpi@vger.kernel.org 1500 */ 1501 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1502 /* 1503 * Boxes that need ACPI disabled 1504 */ 1505 { 1506 .callback = dmi_disable_acpi, 1507 .ident = "IBM Thinkpad", 1508 .matches = { 1509 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1510 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1511 }, 1512 }, 1513 1514 /* 1515 * Boxes that need ACPI PCI IRQ routing disabled 1516 */ 1517 { 1518 .callback = disable_acpi_irq, 1519 .ident = "ASUS A7V", 1520 .matches = { 1521 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1522 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1523 /* newer BIOS, Revision 1011, does work */ 1524 DMI_MATCH(DMI_BIOS_VERSION, 1525 "ASUS A7V ACPI BIOS Revision 1007"), 1526 }, 1527 }, 1528 { 1529 /* 1530 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1531 * for LPC bridge, which is needed for the PCI 1532 * interrupt links to work. DSDT fix is in bug 5966. 1533 * 2645, 2646 model numbers are shared with 600/600E/600X 1534 */ 1535 .callback = disable_acpi_irq, 1536 .ident = "IBM Thinkpad 600 Series 2645", 1537 .matches = { 1538 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1539 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1540 }, 1541 }, 1542 { 1543 .callback = disable_acpi_irq, 1544 .ident = "IBM Thinkpad 600 Series 2646", 1545 .matches = { 1546 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1547 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1548 }, 1549 }, 1550 /* 1551 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1552 */ 1553 { /* _BBN 0 bug */ 1554 .callback = disable_acpi_pci, 1555 .ident = "ASUS PR-DLS", 1556 .matches = { 1557 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1558 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1559 DMI_MATCH(DMI_BIOS_VERSION, 1560 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1561 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1562 }, 1563 }, 1564 { 1565 .callback = disable_acpi_pci, 1566 .ident = "Acer TravelMate 36x Laptop", 1567 .matches = { 1568 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1569 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1570 }, 1571 }, 1572 /* 1573 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1574 */ 1575 { 1576 .callback = disable_acpi_xsdt, 1577 .ident = "Advantech DAC-BJ01", 1578 .matches = { 1579 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1580 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1581 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1582 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1583 }, 1584 }, 1585 {} 1586 }; 1587 1588 /* second table for DMI checks that should run after early-quirks */ 1589 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1590 /* 1591 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1592 * which includes some code which overrides all temperature 1593 * trip points to 16C if the INTIN2 input of the I/O APIC 1594 * is enabled. This input is incorrectly designated the 1595 * ISA IRQ 0 via an interrupt source override even though 1596 * it is wired to the output of the master 8259A and INTIN0 1597 * is not connected at all. Force ignoring BIOS IRQ0 1598 * override in that cases. 1599 */ 1600 { 1601 .callback = dmi_ignore_irq0_timer_override, 1602 .ident = "HP nx6115 laptop", 1603 .matches = { 1604 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1605 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1606 }, 1607 }, 1608 { 1609 .callback = dmi_ignore_irq0_timer_override, 1610 .ident = "HP NX6125 laptop", 1611 .matches = { 1612 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1613 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1614 }, 1615 }, 1616 { 1617 .callback = dmi_ignore_irq0_timer_override, 1618 .ident = "HP NX6325 laptop", 1619 .matches = { 1620 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1621 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1622 }, 1623 }, 1624 { 1625 .callback = dmi_ignore_irq0_timer_override, 1626 .ident = "HP 6715b laptop", 1627 .matches = { 1628 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1629 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1630 }, 1631 }, 1632 { 1633 .callback = dmi_ignore_irq0_timer_override, 1634 .ident = "FUJITSU SIEMENS", 1635 .matches = { 1636 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1637 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1638 }, 1639 }, 1640 {} 1641 }; 1642 1643 /* 1644 * acpi_boot_table_init() and acpi_boot_init() 1645 * called from setup_arch(), always. 1646 * 1. checksums all tables 1647 * 2. enumerates lapics 1648 * 3. enumerates io-apics 1649 * 1650 * acpi_table_init() is separate to allow reading SRAT without 1651 * other side effects. 1652 * 1653 * side effects of acpi_boot_init: 1654 * acpi_lapic = 1 if LAPIC found 1655 * acpi_ioapic = 1 if IOAPIC found 1656 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1657 * if acpi_blacklisted() acpi_disabled = 1; 1658 * acpi_irq_model=... 1659 * ... 1660 */ 1661 1662 void __init acpi_boot_table_init(void) 1663 { 1664 dmi_check_system(acpi_dmi_table); 1665 1666 /* 1667 * If acpi_disabled, bail out 1668 */ 1669 if (acpi_disabled) 1670 return; 1671 1672 /* 1673 * Initialize the ACPI boot-time table parser. 1674 */ 1675 if (acpi_locate_initial_tables()) 1676 disable_acpi(); 1677 else 1678 acpi_reserve_initial_tables(); 1679 } 1680 1681 int __init early_acpi_boot_init(void) 1682 { 1683 if (acpi_disabled) 1684 return 1; 1685 1686 acpi_table_init_complete(); 1687 1688 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1689 1690 /* 1691 * blacklist may disable ACPI entirely 1692 */ 1693 if (acpi_blacklisted()) { 1694 if (acpi_force) { 1695 pr_warn("acpi=force override\n"); 1696 } else { 1697 pr_warn("Disabling ACPI support\n"); 1698 disable_acpi(); 1699 return 1; 1700 } 1701 } 1702 1703 /* 1704 * Process the Multiple APIC Description Table (MADT), if present 1705 */ 1706 early_acpi_process_madt(); 1707 1708 /* 1709 * Hardware-reduced ACPI mode initialization: 1710 */ 1711 acpi_reduced_hw_init(); 1712 1713 return 0; 1714 } 1715 1716 int __init acpi_boot_init(void) 1717 { 1718 /* those are executed after early-quirks are executed */ 1719 dmi_check_system(acpi_dmi_table_late); 1720 1721 /* 1722 * If acpi_disabled, bail out 1723 */ 1724 if (acpi_disabled) 1725 return 1; 1726 1727 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1728 1729 /* 1730 * set sci_int and PM timer address 1731 */ 1732 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1733 1734 /* 1735 * Process the Multiple APIC Description Table (MADT), if present 1736 */ 1737 acpi_process_madt(); 1738 1739 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1740 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1741 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1742 1743 if (!acpi_noirq) 1744 x86_init.pci.init = pci_acpi_init; 1745 1746 /* Do not enable ACPI SPCR console by default */ 1747 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1748 return 0; 1749 } 1750 1751 static int __init parse_acpi(char *arg) 1752 { 1753 if (!arg) 1754 return -EINVAL; 1755 1756 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1757 if (strcmp(arg, "off") == 0) { 1758 disable_acpi(); 1759 } 1760 /* acpi=force to over-ride black-list */ 1761 else if (strcmp(arg, "force") == 0) { 1762 acpi_force = 1; 1763 acpi_disabled = 0; 1764 } 1765 /* acpi=strict disables out-of-spec workarounds */ 1766 else if (strcmp(arg, "strict") == 0) { 1767 acpi_strict = 1; 1768 } 1769 /* acpi=rsdt use RSDT instead of XSDT */ 1770 else if (strcmp(arg, "rsdt") == 0) { 1771 acpi_gbl_do_not_use_xsdt = TRUE; 1772 } 1773 /* "acpi=noirq" disables ACPI interrupt routing */ 1774 else if (strcmp(arg, "noirq") == 0) { 1775 acpi_noirq_set(); 1776 } 1777 /* "acpi=copy_dsdt" copies DSDT */ 1778 else if (strcmp(arg, "copy_dsdt") == 0) { 1779 acpi_gbl_copy_dsdt_locally = 1; 1780 } 1781 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1782 else if (strcmp(arg, "nocmcff") == 0) { 1783 acpi_disable_cmcff = 1; 1784 } else { 1785 /* Core will printk when we return error. */ 1786 return -EINVAL; 1787 } 1788 return 0; 1789 } 1790 early_param("acpi", parse_acpi); 1791 1792 static int __init parse_acpi_bgrt(char *arg) 1793 { 1794 acpi_nobgrt = true; 1795 return 0; 1796 } 1797 early_param("bgrt_disable", parse_acpi_bgrt); 1798 1799 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1800 static int __init parse_pci(char *arg) 1801 { 1802 if (arg && strcmp(arg, "noacpi") == 0) 1803 acpi_disable_pci(); 1804 return 0; 1805 } 1806 early_param("pci", parse_pci); 1807 1808 int __init acpi_mps_check(void) 1809 { 1810 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1811 /* mptable code is not built-in*/ 1812 if (acpi_disabled || acpi_noirq) { 1813 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1814 return 1; 1815 } 1816 #endif 1817 return 0; 1818 } 1819 1820 #ifdef CONFIG_X86_IO_APIC 1821 static int __init parse_acpi_skip_timer_override(char *arg) 1822 { 1823 acpi_skip_timer_override = 1; 1824 return 0; 1825 } 1826 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1827 1828 static int __init parse_acpi_use_timer_override(char *arg) 1829 { 1830 acpi_use_timer_override = 1; 1831 return 0; 1832 } 1833 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1834 #endif /* CONFIG_X86_IO_APIC */ 1835 1836 static int __init setup_acpi_sci(char *s) 1837 { 1838 if (!s) 1839 return -EINVAL; 1840 if (!strcmp(s, "edge")) 1841 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1842 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1843 else if (!strcmp(s, "level")) 1844 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1845 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1846 else if (!strcmp(s, "high")) 1847 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1848 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1849 else if (!strcmp(s, "low")) 1850 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1851 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1852 else 1853 return -EINVAL; 1854 return 0; 1855 } 1856 early_param("acpi_sci", setup_acpi_sci); 1857 1858 int __acpi_acquire_global_lock(unsigned int *lock) 1859 { 1860 unsigned int old, new, val; 1861 1862 old = READ_ONCE(*lock); 1863 do { 1864 val = (old >> 1) & 0x1; 1865 new = (old & ~0x3) + 2 + val; 1866 } while (!try_cmpxchg(lock, &old, new)); 1867 1868 if (val) 1869 return 0; 1870 1871 return -1; 1872 } 1873 1874 int __acpi_release_global_lock(unsigned int *lock) 1875 { 1876 unsigned int old, new; 1877 1878 old = READ_ONCE(*lock); 1879 do { 1880 new = old & ~0x3; 1881 } while (!try_cmpxchg(lock, &old, new)); 1882 return old & 0x1; 1883 } 1884 1885 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1886 { 1887 e820__range_add(addr, size, E820_TYPE_NVS); 1888 e820__update_table_print(); 1889 } 1890 1891 void x86_default_set_root_pointer(u64 addr) 1892 { 1893 boot_params.acpi_rsdp_addr = addr; 1894 } 1895 1896 u64 x86_default_get_root_pointer(void) 1897 { 1898 return boot_params.acpi_rsdp_addr; 1899 } 1900