1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 4 * 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 7 */ 8 #define pr_fmt(fmt) "ACPI: " fmt 9 10 #include <linux/init.h> 11 #include <linux/acpi.h> 12 #include <linux/acpi_pmtmr.h> 13 #include <linux/efi.h> 14 #include <linux/cpumask.h> 15 #include <linux/export.h> 16 #include <linux/dmi.h> 17 #include <linux/irq.h> 18 #include <linux/slab.h> 19 #include <linux/memblock.h> 20 #include <linux/ioport.h> 21 #include <linux/pci.h> 22 #include <linux/efi-bgrt.h> 23 #include <linux/serial_core.h> 24 #include <linux/pgtable.h> 25 26 #include <asm/e820/api.h> 27 #include <asm/irqdomain.h> 28 #include <asm/pci_x86.h> 29 #include <asm/io_apic.h> 30 #include <asm/apic.h> 31 #include <asm/io.h> 32 #include <asm/mpspec.h> 33 #include <asm/smp.h> 34 #include <asm/i8259.h> 35 #include <asm/setup.h> 36 37 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 38 static int __initdata acpi_force = 0; 39 int acpi_disabled; 40 EXPORT_SYMBOL(acpi_disabled); 41 42 #ifdef CONFIG_X86_64 43 # include <asm/proto.h> 44 #endif /* X86 */ 45 46 int acpi_noirq; /* skip ACPI IRQ initialization */ 47 static int acpi_nobgrt; /* skip ACPI BGRT */ 48 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 49 EXPORT_SYMBOL(acpi_pci_disabled); 50 51 int acpi_lapic; 52 int acpi_ioapic; 53 int acpi_strict; 54 int acpi_disable_cmcff; 55 bool acpi_int_src_ovr[NR_IRQS_LEGACY]; 56 57 /* ACPI SCI override configuration */ 58 u8 acpi_sci_flags __initdata; 59 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 60 int acpi_skip_timer_override __initdata; 61 int acpi_use_timer_override __initdata; 62 int acpi_fix_pin2_polarity __initdata; 63 64 #ifdef CONFIG_X86_LOCAL_APIC 65 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 66 static bool acpi_support_online_capable; 67 #endif 68 69 #ifdef CONFIG_X86_64 70 /* Physical address of the Multiprocessor Wakeup Structure mailbox */ 71 static u64 acpi_mp_wake_mailbox_paddr; 72 /* Virtual address of the Multiprocessor Wakeup Structure mailbox */ 73 static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox; 74 #endif 75 76 #ifdef CONFIG_X86_IO_APIC 77 /* 78 * Locks related to IOAPIC hotplug 79 * Hotplug side: 80 * ->device_hotplug_lock 81 * ->acpi_ioapic_lock 82 * ->ioapic_lock 83 * Interrupt mapping side: 84 * ->acpi_ioapic_lock 85 * ->ioapic_mutex 86 * ->ioapic_lock 87 */ 88 static DEFINE_MUTEX(acpi_ioapic_lock); 89 #endif 90 91 /* -------------------------------------------------------------------------- 92 Boot-time Configuration 93 -------------------------------------------------------------------------- */ 94 95 /* 96 * The default interrupt routing model is PIC (8259). This gets 97 * overridden if IOAPICs are enumerated (below). 98 */ 99 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 100 101 102 /* 103 * ISA irqs by default are the first 16 gsis but can be 104 * any gsi as specified by an interrupt source override. 105 */ 106 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 107 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 108 }; 109 110 /* 111 * This is just a simple wrapper around early_memremap(), 112 * with sanity checks for phys == 0 and size == 0. 113 */ 114 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 115 { 116 117 if (!phys || !size) 118 return NULL; 119 120 return early_memremap(phys, size); 121 } 122 123 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 124 { 125 if (!map || !size) 126 return; 127 128 early_memunmap(map, size); 129 } 130 131 #ifdef CONFIG_X86_LOCAL_APIC 132 static int __init acpi_parse_madt(struct acpi_table_header *table) 133 { 134 struct acpi_table_madt *madt = NULL; 135 136 if (!boot_cpu_has(X86_FEATURE_APIC)) 137 return -EINVAL; 138 139 madt = (struct acpi_table_madt *)table; 140 if (!madt) { 141 pr_warn("Unable to map MADT\n"); 142 return -ENODEV; 143 } 144 145 if (madt->address) { 146 acpi_lapic_addr = (u64) madt->address; 147 148 pr_debug("Local APIC address 0x%08x\n", madt->address); 149 } 150 151 /* ACPI 6.3 and newer support the online capable bit. */ 152 if (acpi_gbl_FADT.header.revision > 6 || 153 (acpi_gbl_FADT.header.revision == 6 && 154 acpi_gbl_FADT.minor_revision >= 3)) 155 acpi_support_online_capable = true; 156 157 default_acpi_madt_oem_check(madt->header.oem_id, 158 madt->header.oem_table_id); 159 160 return 0; 161 } 162 163 /** 164 * acpi_register_lapic - register a local apic and generates a logic cpu number 165 * @id: local apic id to register 166 * @acpiid: ACPI id to register 167 * @enabled: this cpu is enabled or not 168 * 169 * Returns the logic cpu number which maps to the local apic 170 */ 171 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 172 { 173 unsigned int ver = 0; 174 int cpu; 175 176 if (id >= MAX_LOCAL_APIC) { 177 pr_info("skipped apicid that is too big\n"); 178 return -EINVAL; 179 } 180 181 if (!enabled) { 182 ++disabled_cpus; 183 return -EINVAL; 184 } 185 186 if (boot_cpu_physical_apicid != -1U) 187 ver = boot_cpu_apic_version; 188 189 cpu = generic_processor_info(id, ver); 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 * We need to register disabled CPU as well to permit 238 * counting disabled CPUs. This allows us to size 239 * cpus_possible_map more accurately, to permit 240 * to not preallocating memory for all NR_CPUS 241 * when we use CPU hotplug. 242 */ 243 if (!apic->apic_id_valid(apic_id)) { 244 if (enabled) 245 pr_warn("x2apic entry ignored\n"); 246 return 0; 247 } 248 249 acpi_register_lapic(apic_id, processor->uid, enabled); 250 #else 251 pr_warn("x2apic entry ignored\n"); 252 #endif 253 254 return 0; 255 } 256 257 static int __init 258 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 259 { 260 struct acpi_madt_local_apic *processor = NULL; 261 262 processor = (struct acpi_madt_local_apic *)header; 263 264 if (BAD_MADT_ENTRY(processor, end)) 265 return -EINVAL; 266 267 acpi_table_print_madt_entry(&header->common); 268 269 /* Ignore invalid ID */ 270 if (processor->id == 0xff) 271 return 0; 272 273 /* don't register processors that can not be onlined */ 274 if (!acpi_is_processor_usable(processor->lapic_flags)) 275 return 0; 276 277 /* 278 * We need to register disabled CPU as well to permit 279 * counting disabled CPUs. This allows us to size 280 * cpus_possible_map more accurately, to permit 281 * to not preallocating memory for all NR_CPUS 282 * when we use CPU hotplug. 283 */ 284 acpi_register_lapic(processor->id, /* 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_sapic(union acpi_subtable_headers *header, const unsigned long end) 293 { 294 struct acpi_madt_local_sapic *processor = NULL; 295 296 processor = (struct acpi_madt_local_sapic *)header; 297 298 if (BAD_MADT_ENTRY(processor, end)) 299 return -EINVAL; 300 301 acpi_table_print_madt_entry(&header->common); 302 303 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 304 processor->processor_id, /* ACPI ID */ 305 processor->lapic_flags & ACPI_MADT_ENABLED); 306 307 return 0; 308 } 309 310 static int __init 311 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 312 const unsigned long end) 313 { 314 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 315 316 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 317 318 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 319 return -EINVAL; 320 321 acpi_table_print_madt_entry(&header->common); 322 323 acpi_lapic_addr = lapic_addr_ovr->address; 324 325 return 0; 326 } 327 328 static int __init 329 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 330 const unsigned long end) 331 { 332 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 333 334 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 335 336 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 337 return -EINVAL; 338 339 acpi_table_print_madt_entry(&header->common); 340 341 if (x2apic_nmi->lint != 1) 342 pr_warn("NMI not connected to LINT 1!\n"); 343 344 return 0; 345 } 346 347 static int __init 348 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 349 { 350 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 351 352 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 353 354 if (BAD_MADT_ENTRY(lapic_nmi, end)) 355 return -EINVAL; 356 357 acpi_table_print_madt_entry(&header->common); 358 359 if (lapic_nmi->lint != 1) 360 pr_warn("NMI not connected to LINT 1!\n"); 361 362 return 0; 363 } 364 365 #ifdef CONFIG_X86_64 366 static int acpi_wakeup_cpu(int apicid, unsigned long start_ip) 367 { 368 /* 369 * Remap mailbox memory only for the first call to acpi_wakeup_cpu(). 370 * 371 * Wakeup of secondary CPUs is fully serialized in the core code. 372 * No need to protect acpi_mp_wake_mailbox from concurrent accesses. 373 */ 374 if (!acpi_mp_wake_mailbox) { 375 acpi_mp_wake_mailbox = memremap(acpi_mp_wake_mailbox_paddr, 376 sizeof(*acpi_mp_wake_mailbox), 377 MEMREMAP_WB); 378 } 379 380 /* 381 * Mailbox memory is shared between the firmware and OS. Firmware will 382 * listen on mailbox command address, and once it receives the wakeup 383 * command, the CPU associated with the given apicid will be booted. 384 * 385 * The value of 'apic_id' and 'wakeup_vector' must be visible to the 386 * firmware before the wakeup command is visible. smp_store_release() 387 * ensures ordering and visibility. 388 */ 389 acpi_mp_wake_mailbox->apic_id = apicid; 390 acpi_mp_wake_mailbox->wakeup_vector = start_ip; 391 smp_store_release(&acpi_mp_wake_mailbox->command, 392 ACPI_MP_WAKE_COMMAND_WAKEUP); 393 394 /* 395 * Wait for the CPU to wake up. 396 * 397 * The CPU being woken up is essentially in a spin loop waiting to be 398 * woken up. It should not take long for it wake up and acknowledge by 399 * zeroing out ->command. 400 * 401 * ACPI specification doesn't provide any guidance on how long kernel 402 * has to wait for a wake up acknowledgement. It also doesn't provide 403 * a way to cancel a wake up request if it takes too long. 404 * 405 * In TDX environment, the VMM has control over how long it takes to 406 * wake up secondary. It can postpone scheduling secondary vCPU 407 * indefinitely. Giving up on wake up request and reporting error opens 408 * possible attack vector for VMM: it can wake up a secondary CPU when 409 * kernel doesn't expect it. Wait until positive result of the wake up 410 * request. 411 */ 412 while (READ_ONCE(acpi_mp_wake_mailbox->command)) 413 cpu_relax(); 414 415 return 0; 416 } 417 #endif /* CONFIG_X86_64 */ 418 #endif /* CONFIG_X86_LOCAL_APIC */ 419 420 #ifdef CONFIG_X86_IO_APIC 421 #define MP_ISA_BUS 0 422 423 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 424 u8 trigger, u32 gsi); 425 426 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 427 u32 gsi) 428 { 429 /* 430 * Check bus_irq boundary. 431 */ 432 if (bus_irq >= NR_IRQS_LEGACY) { 433 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 434 return; 435 } 436 437 /* 438 * TBD: This check is for faulty timer entries, where the override 439 * erroneously sets the trigger to level, resulting in a HUGE 440 * increase of timer interrupts! 441 */ 442 if ((bus_irq == 0) && (trigger == 3)) 443 trigger = 1; 444 445 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 446 return; 447 /* 448 * Reset default identity mapping if gsi is also an legacy IRQ, 449 * otherwise there will be more than one entry with the same GSI 450 * and acpi_isa_irq_to_gsi() may give wrong result. 451 */ 452 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 453 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 454 isa_irq_to_gsi[bus_irq] = gsi; 455 } 456 457 static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 458 int polarity) 459 { 460 #ifdef CONFIG_X86_MPPARSE 461 struct mpc_intsrc mp_irq; 462 struct pci_dev *pdev; 463 unsigned char number; 464 unsigned int devfn; 465 int ioapic; 466 u8 pin; 467 468 if (!acpi_ioapic) 469 return; 470 if (!dev || !dev_is_pci(dev)) 471 return; 472 473 pdev = to_pci_dev(dev); 474 number = pdev->bus->number; 475 devfn = pdev->devfn; 476 pin = pdev->pin; 477 /* print the entry should happen on mptable identically */ 478 mp_irq.type = MP_INTSRC; 479 mp_irq.irqtype = mp_INT; 480 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 481 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 482 mp_irq.srcbus = number; 483 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 484 ioapic = mp_find_ioapic(gsi); 485 mp_irq.dstapic = mpc_ioapic_id(ioapic); 486 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 487 488 mp_save_irq(&mp_irq); 489 #endif 490 } 491 492 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 493 u8 trigger, u32 gsi) 494 { 495 struct mpc_intsrc mp_irq; 496 int ioapic, pin; 497 498 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 499 ioapic = mp_find_ioapic(gsi); 500 if (ioapic < 0) { 501 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 502 return ioapic; 503 } 504 505 pin = mp_find_ioapic_pin(ioapic, gsi); 506 507 mp_irq.type = MP_INTSRC; 508 mp_irq.irqtype = mp_INT; 509 mp_irq.irqflag = (trigger << 2) | polarity; 510 mp_irq.srcbus = MP_ISA_BUS; 511 mp_irq.srcbusirq = bus_irq; 512 mp_irq.dstapic = mpc_ioapic_id(ioapic); 513 mp_irq.dstirq = pin; 514 515 mp_save_irq(&mp_irq); 516 517 return 0; 518 } 519 520 static int __init 521 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 522 { 523 struct acpi_madt_io_apic *ioapic = NULL; 524 struct ioapic_domain_cfg cfg = { 525 .type = IOAPIC_DOMAIN_DYNAMIC, 526 .ops = &mp_ioapic_irqdomain_ops, 527 }; 528 529 ioapic = (struct acpi_madt_io_apic *)header; 530 531 if (BAD_MADT_ENTRY(ioapic, end)) 532 return -EINVAL; 533 534 acpi_table_print_madt_entry(&header->common); 535 536 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 537 if (ioapic->global_irq_base < nr_legacy_irqs()) 538 cfg.type = IOAPIC_DOMAIN_LEGACY; 539 540 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 541 &cfg); 542 543 return 0; 544 } 545 546 /* 547 * Parse Interrupt Source Override for the ACPI SCI 548 */ 549 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 550 { 551 if (trigger == 0) /* compatible SCI trigger is level */ 552 trigger = 3; 553 554 if (polarity == 0) /* compatible SCI polarity is low */ 555 polarity = 3; 556 557 /* Command-line over-ride via acpi_sci= */ 558 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 559 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 560 561 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 562 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 563 564 if (bus_irq < NR_IRQS_LEGACY) 565 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 566 else 567 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 568 569 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 570 571 /* 572 * stash over-ride to indicate we've been here 573 * and for later update of acpi_gbl_FADT 574 */ 575 acpi_sci_override_gsi = gsi; 576 return; 577 } 578 579 static int __init 580 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 581 const unsigned long end) 582 { 583 struct acpi_madt_interrupt_override *intsrc = NULL; 584 585 intsrc = (struct acpi_madt_interrupt_override *)header; 586 587 if (BAD_MADT_ENTRY(intsrc, end)) 588 return -EINVAL; 589 590 acpi_table_print_madt_entry(&header->common); 591 592 if (intsrc->source_irq < NR_IRQS_LEGACY) 593 acpi_int_src_ovr[intsrc->source_irq] = true; 594 595 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 596 acpi_sci_ioapic_setup(intsrc->source_irq, 597 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 598 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 599 intsrc->global_irq); 600 return 0; 601 } 602 603 if (intsrc->source_irq == 0) { 604 if (acpi_skip_timer_override) { 605 pr_warn("BIOS IRQ0 override ignored.\n"); 606 return 0; 607 } 608 609 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 610 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 611 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 612 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 613 } 614 } 615 616 mp_override_legacy_irq(intsrc->source_irq, 617 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 618 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 619 intsrc->global_irq); 620 621 return 0; 622 } 623 624 static int __init 625 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 626 { 627 struct acpi_madt_nmi_source *nmi_src = NULL; 628 629 nmi_src = (struct acpi_madt_nmi_source *)header; 630 631 if (BAD_MADT_ENTRY(nmi_src, end)) 632 return -EINVAL; 633 634 acpi_table_print_madt_entry(&header->common); 635 636 /* TBD: Support nimsrc entries? */ 637 638 return 0; 639 } 640 641 #endif /* CONFIG_X86_IO_APIC */ 642 643 /* 644 * acpi_pic_sci_set_trigger() 645 * 646 * use ELCR to set PIC-mode trigger type for SCI 647 * 648 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 649 * it may require Edge Trigger -- use "acpi_sci=edge" 650 * 651 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers 652 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 653 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 654 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 655 */ 656 657 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 658 { 659 unsigned int mask = 1 << irq; 660 unsigned int old, new; 661 662 /* Real old ELCR mask */ 663 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8); 664 665 /* 666 * If we use ACPI to set PCI IRQs, then we should clear ELCR 667 * since we will set it correctly as we enable the PCI irq 668 * routing. 669 */ 670 new = acpi_noirq ? old : 0; 671 672 /* 673 * Update SCI information in the ELCR, it isn't in the PCI 674 * routing tables.. 675 */ 676 switch (trigger) { 677 case 1: /* Edge - clear */ 678 new &= ~mask; 679 break; 680 case 3: /* Level - set */ 681 new |= mask; 682 break; 683 } 684 685 if (old == new) 686 return; 687 688 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 689 outb(new, PIC_ELCR1); 690 outb(new >> 8, PIC_ELCR2); 691 } 692 693 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 694 { 695 int rc, irq, trigger, polarity; 696 697 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 698 *irqp = gsi; 699 return 0; 700 } 701 702 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 703 if (rc) 704 return rc; 705 706 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 707 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 708 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 709 if (irq < 0) 710 return irq; 711 712 *irqp = irq; 713 return 0; 714 } 715 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 716 717 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 718 { 719 if (isa_irq < nr_legacy_irqs() && 720 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 721 *gsi = isa_irq_to_gsi[isa_irq]; 722 return 0; 723 } 724 725 return -1; 726 } 727 728 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 729 int trigger, int polarity) 730 { 731 #ifdef CONFIG_PCI 732 /* 733 * Make sure all (legacy) PCI IRQs are set as level-triggered. 734 */ 735 if (trigger == ACPI_LEVEL_SENSITIVE) 736 elcr_set_level_irq(gsi); 737 #endif 738 739 return gsi; 740 } 741 742 #ifdef CONFIG_X86_LOCAL_APIC 743 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 744 int trigger, int polarity) 745 { 746 int irq = gsi; 747 #ifdef CONFIG_X86_IO_APIC 748 int node; 749 struct irq_alloc_info info; 750 751 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 752 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 753 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 754 ioapic_set_alloc_attr(&info, node, trigger, polarity); 755 756 mutex_lock(&acpi_ioapic_lock); 757 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 758 /* Don't set up the ACPI SCI because it's already set up */ 759 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 760 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 761 mutex_unlock(&acpi_ioapic_lock); 762 #endif 763 764 return irq; 765 } 766 767 static void acpi_unregister_gsi_ioapic(u32 gsi) 768 { 769 #ifdef CONFIG_X86_IO_APIC 770 int irq; 771 772 mutex_lock(&acpi_ioapic_lock); 773 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 774 if (irq > 0) 775 mp_unmap_irq(irq); 776 mutex_unlock(&acpi_ioapic_lock); 777 #endif 778 } 779 #endif 780 781 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 782 int trigger, int polarity) = acpi_register_gsi_pic; 783 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 784 785 #ifdef CONFIG_ACPI_SLEEP 786 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 787 #else 788 int (*acpi_suspend_lowlevel)(void); 789 #endif 790 791 /* 792 * success: return IRQ number (>=0) 793 * failure: return < 0 794 */ 795 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 796 { 797 return __acpi_register_gsi(dev, gsi, trigger, polarity); 798 } 799 EXPORT_SYMBOL_GPL(acpi_register_gsi); 800 801 void acpi_unregister_gsi(u32 gsi) 802 { 803 if (__acpi_unregister_gsi) 804 __acpi_unregister_gsi(gsi); 805 } 806 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 807 808 #ifdef CONFIG_X86_LOCAL_APIC 809 static void __init acpi_set_irq_model_ioapic(void) 810 { 811 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 812 __acpi_register_gsi = acpi_register_gsi_ioapic; 813 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 814 acpi_ioapic = 1; 815 } 816 #endif 817 818 /* 819 * ACPI based hotplug support for CPU 820 */ 821 #ifdef CONFIG_ACPI_HOTPLUG_CPU 822 #include <acpi/processor.h> 823 824 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 825 { 826 #ifdef CONFIG_ACPI_NUMA 827 int nid; 828 829 nid = acpi_get_node(handle); 830 if (nid != NUMA_NO_NODE) { 831 set_apicid_to_node(physid, nid); 832 numa_set_node(cpu, nid); 833 } 834 #endif 835 return 0; 836 } 837 838 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 839 int *pcpu) 840 { 841 int cpu; 842 843 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 844 if (cpu < 0) { 845 pr_info("Unable to map lapic to logical cpu number\n"); 846 return cpu; 847 } 848 849 acpi_processor_set_pdc(handle); 850 acpi_map_cpu2node(handle, cpu, physid); 851 852 *pcpu = cpu; 853 return 0; 854 } 855 EXPORT_SYMBOL(acpi_map_cpu); 856 857 int acpi_unmap_cpu(int cpu) 858 { 859 #ifdef CONFIG_ACPI_NUMA 860 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 861 #endif 862 863 per_cpu(x86_cpu_to_apicid, cpu) = -1; 864 set_cpu_present(cpu, false); 865 num_processors--; 866 867 return (0); 868 } 869 EXPORT_SYMBOL(acpi_unmap_cpu); 870 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 871 872 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 873 { 874 int ret = -ENOSYS; 875 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 876 int ioapic_id; 877 u64 addr; 878 struct ioapic_domain_cfg cfg = { 879 .type = IOAPIC_DOMAIN_DYNAMIC, 880 .ops = &mp_ioapic_irqdomain_ops, 881 }; 882 883 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 884 if (ioapic_id < 0) { 885 unsigned long long uid; 886 acpi_status status; 887 888 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 889 NULL, &uid); 890 if (ACPI_FAILURE(status)) { 891 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 892 return -EINVAL; 893 } 894 ioapic_id = (int)uid; 895 } 896 897 mutex_lock(&acpi_ioapic_lock); 898 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 899 mutex_unlock(&acpi_ioapic_lock); 900 #endif 901 902 return ret; 903 } 904 EXPORT_SYMBOL(acpi_register_ioapic); 905 906 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 907 { 908 int ret = -ENOSYS; 909 910 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 911 mutex_lock(&acpi_ioapic_lock); 912 ret = mp_unregister_ioapic(gsi_base); 913 mutex_unlock(&acpi_ioapic_lock); 914 #endif 915 916 return ret; 917 } 918 EXPORT_SYMBOL(acpi_unregister_ioapic); 919 920 /** 921 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 922 * has been registered 923 * @handle: ACPI handle of the IOAPIC device 924 * @gsi_base: GSI base associated with the IOAPIC 925 * 926 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 927 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 928 */ 929 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 930 { 931 int ret = 0; 932 933 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 934 mutex_lock(&acpi_ioapic_lock); 935 ret = mp_ioapic_registered(gsi_base); 936 mutex_unlock(&acpi_ioapic_lock); 937 #endif 938 939 return ret; 940 } 941 942 static int __init acpi_parse_sbf(struct acpi_table_header *table) 943 { 944 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 945 946 sbf_port = sb->cmos_index; /* Save CMOS port */ 947 948 return 0; 949 } 950 951 #ifdef CONFIG_HPET_TIMER 952 #include <asm/hpet.h> 953 954 static struct resource *hpet_res __initdata; 955 956 static int __init acpi_parse_hpet(struct acpi_table_header *table) 957 { 958 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 959 960 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 961 pr_warn("HPET timers must be located in memory.\n"); 962 return -1; 963 } 964 965 hpet_address = hpet_tbl->address.address; 966 hpet_blockid = hpet_tbl->sequence; 967 968 /* 969 * Some broken BIOSes advertise HPET at 0x0. We really do not 970 * want to allocate a resource there. 971 */ 972 if (!hpet_address) { 973 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 974 return 0; 975 } 976 #ifdef CONFIG_X86_64 977 /* 978 * Some even more broken BIOSes advertise HPET at 979 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 980 * some noise: 981 */ 982 if (hpet_address == 0xfed0000000000000UL) { 983 if (!hpet_force_user) { 984 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 985 hpet_tbl->id); 986 hpet_address = 0; 987 return 0; 988 } 989 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 990 hpet_tbl->id); 991 hpet_address >>= 32; 992 } 993 #endif 994 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 995 996 /* 997 * Allocate and initialize the HPET firmware resource for adding into 998 * the resource tree during the lateinit timeframe. 999 */ 1000 #define HPET_RESOURCE_NAME_SIZE 9 1001 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 1002 SMP_CACHE_BYTES); 1003 if (!hpet_res) 1004 panic("%s: Failed to allocate %zu bytes\n", __func__, 1005 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 1006 1007 hpet_res->name = (void *)&hpet_res[1]; 1008 hpet_res->flags = IORESOURCE_MEM; 1009 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 1010 hpet_tbl->sequence); 1011 1012 hpet_res->start = hpet_address; 1013 hpet_res->end = hpet_address + (1 * 1024) - 1; 1014 1015 return 0; 1016 } 1017 1018 /* 1019 * hpet_insert_resource inserts the HPET resources used into the resource 1020 * tree. 1021 */ 1022 static __init int hpet_insert_resource(void) 1023 { 1024 if (!hpet_res) 1025 return 1; 1026 1027 return insert_resource(&iomem_resource, hpet_res); 1028 } 1029 1030 late_initcall(hpet_insert_resource); 1031 1032 #else 1033 #define acpi_parse_hpet NULL 1034 #endif 1035 1036 static int __init acpi_parse_fadt(struct acpi_table_header *table) 1037 { 1038 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 1039 pr_debug("no legacy devices present\n"); 1040 x86_platform.legacy.devices.pnpbios = 0; 1041 } 1042 1043 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 1044 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 1045 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 1046 pr_debug("i8042 controller is absent\n"); 1047 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 1048 } 1049 1050 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 1051 pr_debug("not registering RTC platform device\n"); 1052 x86_platform.legacy.rtc = 0; 1053 } 1054 1055 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 1056 pr_debug("probing for VGA not safe\n"); 1057 x86_platform.legacy.no_vga = 1; 1058 } 1059 1060 #ifdef CONFIG_X86_PM_TIMER 1061 /* detect the location of the ACPI PM Timer */ 1062 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 1063 /* FADT rev. 2 */ 1064 if (acpi_gbl_FADT.xpm_timer_block.space_id != 1065 ACPI_ADR_SPACE_SYSTEM_IO) 1066 return 0; 1067 1068 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1069 /* 1070 * "X" fields are optional extensions to the original V1.0 1071 * fields, so we must selectively expand V1.0 fields if the 1072 * corresponding X field is zero. 1073 */ 1074 if (!pmtmr_ioport) 1075 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1076 } else { 1077 /* FADT rev. 1 */ 1078 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1079 } 1080 if (pmtmr_ioport) 1081 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport); 1082 #endif 1083 return 0; 1084 } 1085 1086 #ifdef CONFIG_X86_LOCAL_APIC 1087 /* 1088 * Parse LAPIC entries in MADT 1089 * returns 0 on success, < 0 on error 1090 */ 1091 1092 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1093 { 1094 int count; 1095 1096 if (!boot_cpu_has(X86_FEATURE_APIC)) 1097 return -ENODEV; 1098 1099 /* 1100 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1101 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1102 */ 1103 1104 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1105 acpi_parse_lapic_addr_ovr, 0); 1106 if (count < 0) { 1107 pr_err("Error parsing LAPIC address override entry\n"); 1108 return count; 1109 } 1110 1111 register_lapic_address(acpi_lapic_addr); 1112 1113 return count; 1114 } 1115 1116 static int __init acpi_parse_madt_lapic_entries(void) 1117 { 1118 int count; 1119 int x2count = 0; 1120 int ret; 1121 struct acpi_subtable_proc madt_proc[2]; 1122 1123 if (!boot_cpu_has(X86_FEATURE_APIC)) 1124 return -ENODEV; 1125 1126 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1127 acpi_parse_sapic, MAX_LOCAL_APIC); 1128 1129 if (!count) { 1130 memset(madt_proc, 0, sizeof(madt_proc)); 1131 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1132 madt_proc[0].handler = acpi_parse_lapic; 1133 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1134 madt_proc[1].handler = acpi_parse_x2apic; 1135 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1136 sizeof(struct acpi_table_madt), 1137 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1138 if (ret < 0) { 1139 pr_err("Error parsing LAPIC/X2APIC entries\n"); 1140 return ret; 1141 } 1142 1143 count = madt_proc[0].count; 1144 x2count = madt_proc[1].count; 1145 } 1146 if (!count && !x2count) { 1147 pr_err("No LAPIC entries present\n"); 1148 /* TBD: Cleanup to allow fallback to MPS */ 1149 return -ENODEV; 1150 } else if (count < 0 || x2count < 0) { 1151 pr_err("Error parsing LAPIC entry\n"); 1152 /* TBD: Cleanup to allow fallback to MPS */ 1153 return count; 1154 } 1155 1156 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1157 acpi_parse_x2apic_nmi, 0); 1158 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1159 acpi_parse_lapic_nmi, 0); 1160 if (count < 0 || x2count < 0) { 1161 pr_err("Error parsing LAPIC NMI entry\n"); 1162 /* TBD: Cleanup to allow fallback to MPS */ 1163 return count; 1164 } 1165 return 0; 1166 } 1167 1168 #ifdef CONFIG_X86_64 1169 static int __init acpi_parse_mp_wake(union acpi_subtable_headers *header, 1170 const unsigned long end) 1171 { 1172 struct acpi_madt_multiproc_wakeup *mp_wake; 1173 1174 if (!IS_ENABLED(CONFIG_SMP)) 1175 return -ENODEV; 1176 1177 mp_wake = (struct acpi_madt_multiproc_wakeup *)header; 1178 if (BAD_MADT_ENTRY(mp_wake, end)) 1179 return -EINVAL; 1180 1181 acpi_table_print_madt_entry(&header->common); 1182 1183 acpi_mp_wake_mailbox_paddr = mp_wake->base_address; 1184 1185 acpi_wake_cpu_handler_update(acpi_wakeup_cpu); 1186 1187 return 0; 1188 } 1189 #endif /* CONFIG_X86_64 */ 1190 #endif /* CONFIG_X86_LOCAL_APIC */ 1191 1192 #ifdef CONFIG_X86_IO_APIC 1193 static void __init mp_config_acpi_legacy_irqs(void) 1194 { 1195 int i; 1196 struct mpc_intsrc mp_irq; 1197 1198 #ifdef CONFIG_EISA 1199 /* 1200 * Fabricate the legacy ISA bus (bus #31). 1201 */ 1202 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1203 #endif 1204 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1205 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1206 1207 /* 1208 * Use the default configuration for the IRQs 0-15. Unless 1209 * overridden by (MADT) interrupt source override entries. 1210 */ 1211 for (i = 0; i < nr_legacy_irqs(); i++) { 1212 int ioapic, pin; 1213 unsigned int dstapic; 1214 int idx; 1215 u32 gsi; 1216 1217 /* Locate the gsi that irq i maps to. */ 1218 if (acpi_isa_irq_to_gsi(i, &gsi)) 1219 continue; 1220 1221 /* 1222 * Locate the IOAPIC that manages the ISA IRQ. 1223 */ 1224 ioapic = mp_find_ioapic(gsi); 1225 if (ioapic < 0) 1226 continue; 1227 pin = mp_find_ioapic_pin(ioapic, gsi); 1228 dstapic = mpc_ioapic_id(ioapic); 1229 1230 for (idx = 0; idx < mp_irq_entries; idx++) { 1231 struct mpc_intsrc *irq = mp_irqs + idx; 1232 1233 /* Do we already have a mapping for this ISA IRQ? */ 1234 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1235 break; 1236 1237 /* Do we already have a mapping for this IOAPIC pin */ 1238 if (irq->dstapic == dstapic && irq->dstirq == pin) 1239 break; 1240 } 1241 1242 if (idx != mp_irq_entries) { 1243 pr_debug("ACPI: IRQ%d used by override.\n", i); 1244 continue; /* IRQ already used */ 1245 } 1246 1247 mp_irq.type = MP_INTSRC; 1248 mp_irq.irqflag = 0; /* Conforming */ 1249 mp_irq.srcbus = MP_ISA_BUS; 1250 mp_irq.dstapic = dstapic; 1251 mp_irq.irqtype = mp_INT; 1252 mp_irq.srcbusirq = i; /* Identity mapped */ 1253 mp_irq.dstirq = pin; 1254 1255 mp_save_irq(&mp_irq); 1256 } 1257 } 1258 1259 /* 1260 * Parse IOAPIC related entries in MADT 1261 * returns 0 on success, < 0 on error 1262 */ 1263 static int __init acpi_parse_madt_ioapic_entries(void) 1264 { 1265 int count; 1266 1267 /* 1268 * ACPI interpreter is required to complete interrupt setup, 1269 * so if it is off, don't enumerate the io-apics with ACPI. 1270 * If MPS is present, it will handle them, 1271 * otherwise the system will stay in PIC mode 1272 */ 1273 if (acpi_disabled || acpi_noirq) 1274 return -ENODEV; 1275 1276 if (!boot_cpu_has(X86_FEATURE_APIC)) 1277 return -ENODEV; 1278 1279 /* 1280 * if "noapic" boot option, don't look for IO-APICs 1281 */ 1282 if (skip_ioapic_setup) { 1283 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1284 return -ENODEV; 1285 } 1286 1287 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1288 MAX_IO_APICS); 1289 if (!count) { 1290 pr_err("No IOAPIC entries present\n"); 1291 return -ENODEV; 1292 } else if (count < 0) { 1293 pr_err("Error parsing IOAPIC entry\n"); 1294 return count; 1295 } 1296 1297 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1298 acpi_parse_int_src_ovr, nr_irqs); 1299 if (count < 0) { 1300 pr_err("Error parsing interrupt source overrides entry\n"); 1301 /* TBD: Cleanup to allow fallback to MPS */ 1302 return count; 1303 } 1304 1305 /* 1306 * If BIOS did not supply an INT_SRC_OVR for the SCI 1307 * pretend we got one so we can set the SCI flags. 1308 * But ignore setting up SCI on hardware reduced platforms. 1309 */ 1310 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1311 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1312 acpi_gbl_FADT.sci_interrupt); 1313 1314 /* Fill in identity legacy mappings where no override */ 1315 mp_config_acpi_legacy_irqs(); 1316 1317 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1318 acpi_parse_nmi_src, nr_irqs); 1319 if (count < 0) { 1320 pr_err("Error parsing NMI SRC entry\n"); 1321 /* TBD: Cleanup to allow fallback to MPS */ 1322 return count; 1323 } 1324 1325 return 0; 1326 } 1327 #else 1328 static inline int acpi_parse_madt_ioapic_entries(void) 1329 { 1330 return -1; 1331 } 1332 #endif /* !CONFIG_X86_IO_APIC */ 1333 1334 static void __init early_acpi_process_madt(void) 1335 { 1336 #ifdef CONFIG_X86_LOCAL_APIC 1337 int error; 1338 1339 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1340 1341 /* 1342 * Parse MADT LAPIC entries 1343 */ 1344 error = early_acpi_parse_madt_lapic_addr_ovr(); 1345 if (!error) { 1346 acpi_lapic = 1; 1347 smp_found_config = 1; 1348 } 1349 if (error == -EINVAL) { 1350 /* 1351 * Dell Precision Workstation 410, 610 come here. 1352 */ 1353 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1354 disable_acpi(); 1355 } 1356 } 1357 #endif 1358 } 1359 1360 static void __init acpi_process_madt(void) 1361 { 1362 #ifdef CONFIG_X86_LOCAL_APIC 1363 int error; 1364 1365 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1366 1367 /* 1368 * Parse MADT LAPIC entries 1369 */ 1370 error = acpi_parse_madt_lapic_entries(); 1371 if (!error) { 1372 acpi_lapic = 1; 1373 1374 /* 1375 * Parse MADT IO-APIC entries 1376 */ 1377 mutex_lock(&acpi_ioapic_lock); 1378 error = acpi_parse_madt_ioapic_entries(); 1379 mutex_unlock(&acpi_ioapic_lock); 1380 if (!error) { 1381 acpi_set_irq_model_ioapic(); 1382 1383 smp_found_config = 1; 1384 } 1385 1386 #ifdef CONFIG_X86_64 1387 /* 1388 * Parse MADT MP Wake entry. 1389 */ 1390 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP, 1391 acpi_parse_mp_wake, 1); 1392 #endif 1393 } 1394 if (error == -EINVAL) { 1395 /* 1396 * Dell Precision Workstation 410, 610 come here. 1397 */ 1398 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1399 disable_acpi(); 1400 } 1401 } else { 1402 /* 1403 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1404 * In the event an MPS table was found, forget it. 1405 * Boot with "acpi=off" to use MPS on such a system. 1406 */ 1407 if (smp_found_config) { 1408 pr_warn("No APIC-table, disabling MPS\n"); 1409 smp_found_config = 0; 1410 } 1411 } 1412 1413 /* 1414 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1415 * processors, where MPS only supports physical. 1416 */ 1417 if (acpi_lapic && acpi_ioapic) 1418 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1419 else if (acpi_lapic) 1420 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1421 #endif 1422 return; 1423 } 1424 1425 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1426 { 1427 if (!acpi_force) { 1428 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1429 acpi_noirq_set(); 1430 } 1431 return 0; 1432 } 1433 1434 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1435 { 1436 if (!acpi_force) { 1437 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1438 acpi_disable_pci(); 1439 } 1440 return 0; 1441 } 1442 1443 static int __init disable_acpi_xsdt(const struct dmi_system_id *d) 1444 { 1445 if (!acpi_force) { 1446 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); 1447 acpi_gbl_do_not_use_xsdt = TRUE; 1448 } else { 1449 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); 1450 } 1451 return 0; 1452 } 1453 1454 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1455 { 1456 if (!acpi_force) { 1457 pr_notice("%s detected: acpi off\n", d->ident); 1458 disable_acpi(); 1459 } else { 1460 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1461 } 1462 return 0; 1463 } 1464 1465 /* 1466 * Force ignoring BIOS IRQ0 override 1467 */ 1468 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1469 { 1470 if (!acpi_skip_timer_override) { 1471 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1472 d->ident); 1473 acpi_skip_timer_override = 1; 1474 } 1475 return 0; 1476 } 1477 1478 /* 1479 * ACPI offers an alternative platform interface model that removes 1480 * ACPI hardware requirements for platforms that do not implement 1481 * the PC Architecture. 1482 * 1483 * We initialize the Hardware-reduced ACPI model here: 1484 */ 1485 void __init acpi_generic_reduced_hw_init(void) 1486 { 1487 /* 1488 * Override x86_init functions and bypass legacy PIC in 1489 * hardware reduced ACPI mode. 1490 */ 1491 x86_init.timers.timer_init = x86_init_noop; 1492 x86_init.irqs.pre_vector_init = x86_init_noop; 1493 legacy_pic = &null_legacy_pic; 1494 } 1495 1496 static void __init acpi_reduced_hw_init(void) 1497 { 1498 if (acpi_gbl_reduced_hardware) 1499 x86_init.acpi.reduced_hw_early_init(); 1500 } 1501 1502 /* 1503 * If your system is blacklisted here, but you find that acpi=force 1504 * works for you, please contact linux-acpi@vger.kernel.org 1505 */ 1506 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1507 /* 1508 * Boxes that need ACPI disabled 1509 */ 1510 { 1511 .callback = dmi_disable_acpi, 1512 .ident = "IBM Thinkpad", 1513 .matches = { 1514 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1515 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1516 }, 1517 }, 1518 1519 /* 1520 * Boxes that need ACPI PCI IRQ routing disabled 1521 */ 1522 { 1523 .callback = disable_acpi_irq, 1524 .ident = "ASUS A7V", 1525 .matches = { 1526 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1527 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1528 /* newer BIOS, Revision 1011, does work */ 1529 DMI_MATCH(DMI_BIOS_VERSION, 1530 "ASUS A7V ACPI BIOS Revision 1007"), 1531 }, 1532 }, 1533 { 1534 /* 1535 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1536 * for LPC bridge, which is needed for the PCI 1537 * interrupt links to work. DSDT fix is in bug 5966. 1538 * 2645, 2646 model numbers are shared with 600/600E/600X 1539 */ 1540 .callback = disable_acpi_irq, 1541 .ident = "IBM Thinkpad 600 Series 2645", 1542 .matches = { 1543 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1544 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1545 }, 1546 }, 1547 { 1548 .callback = disable_acpi_irq, 1549 .ident = "IBM Thinkpad 600 Series 2646", 1550 .matches = { 1551 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1552 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1553 }, 1554 }, 1555 /* 1556 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1557 */ 1558 { /* _BBN 0 bug */ 1559 .callback = disable_acpi_pci, 1560 .ident = "ASUS PR-DLS", 1561 .matches = { 1562 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1563 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1564 DMI_MATCH(DMI_BIOS_VERSION, 1565 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1566 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1567 }, 1568 }, 1569 { 1570 .callback = disable_acpi_pci, 1571 .ident = "Acer TravelMate 36x Laptop", 1572 .matches = { 1573 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1574 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1575 }, 1576 }, 1577 /* 1578 * Boxes that need ACPI XSDT use disabled due to corrupted tables 1579 */ 1580 { 1581 .callback = disable_acpi_xsdt, 1582 .ident = "Advantech DAC-BJ01", 1583 .matches = { 1584 DMI_MATCH(DMI_SYS_VENDOR, "NEC"), 1585 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), 1586 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), 1587 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), 1588 }, 1589 }, 1590 {} 1591 }; 1592 1593 /* second table for DMI checks that should run after early-quirks */ 1594 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1595 /* 1596 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1597 * which includes some code which overrides all temperature 1598 * trip points to 16C if the INTIN2 input of the I/O APIC 1599 * is enabled. This input is incorrectly designated the 1600 * ISA IRQ 0 via an interrupt source override even though 1601 * it is wired to the output of the master 8259A and INTIN0 1602 * is not connected at all. Force ignoring BIOS IRQ0 1603 * override in that cases. 1604 */ 1605 { 1606 .callback = dmi_ignore_irq0_timer_override, 1607 .ident = "HP nx6115 laptop", 1608 .matches = { 1609 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1610 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1611 }, 1612 }, 1613 { 1614 .callback = dmi_ignore_irq0_timer_override, 1615 .ident = "HP NX6125 laptop", 1616 .matches = { 1617 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1618 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1619 }, 1620 }, 1621 { 1622 .callback = dmi_ignore_irq0_timer_override, 1623 .ident = "HP NX6325 laptop", 1624 .matches = { 1625 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1626 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1627 }, 1628 }, 1629 { 1630 .callback = dmi_ignore_irq0_timer_override, 1631 .ident = "HP 6715b laptop", 1632 .matches = { 1633 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1634 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1635 }, 1636 }, 1637 { 1638 .callback = dmi_ignore_irq0_timer_override, 1639 .ident = "FUJITSU SIEMENS", 1640 .matches = { 1641 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1642 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1643 }, 1644 }, 1645 {} 1646 }; 1647 1648 /* 1649 * acpi_boot_table_init() and acpi_boot_init() 1650 * called from setup_arch(), always. 1651 * 1. checksums all tables 1652 * 2. enumerates lapics 1653 * 3. enumerates io-apics 1654 * 1655 * acpi_table_init() is separate to allow reading SRAT without 1656 * other side effects. 1657 * 1658 * side effects of acpi_boot_init: 1659 * acpi_lapic = 1 if LAPIC found 1660 * acpi_ioapic = 1 if IOAPIC found 1661 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1662 * if acpi_blacklisted() acpi_disabled = 1; 1663 * acpi_irq_model=... 1664 * ... 1665 */ 1666 1667 void __init acpi_boot_table_init(void) 1668 { 1669 dmi_check_system(acpi_dmi_table); 1670 1671 /* 1672 * If acpi_disabled, bail out 1673 */ 1674 if (acpi_disabled) 1675 return; 1676 1677 /* 1678 * Initialize the ACPI boot-time table parser. 1679 */ 1680 if (acpi_locate_initial_tables()) 1681 disable_acpi(); 1682 else 1683 acpi_reserve_initial_tables(); 1684 } 1685 1686 int __init early_acpi_boot_init(void) 1687 { 1688 if (acpi_disabled) 1689 return 1; 1690 1691 acpi_table_init_complete(); 1692 1693 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1694 1695 /* 1696 * blacklist may disable ACPI entirely 1697 */ 1698 if (acpi_blacklisted()) { 1699 if (acpi_force) { 1700 pr_warn("acpi=force override\n"); 1701 } else { 1702 pr_warn("Disabling ACPI support\n"); 1703 disable_acpi(); 1704 return 1; 1705 } 1706 } 1707 1708 /* 1709 * Process the Multiple APIC Description Table (MADT), if present 1710 */ 1711 early_acpi_process_madt(); 1712 1713 /* 1714 * Hardware-reduced ACPI mode initialization: 1715 */ 1716 acpi_reduced_hw_init(); 1717 1718 return 0; 1719 } 1720 1721 int __init acpi_boot_init(void) 1722 { 1723 /* those are executed after early-quirks are executed */ 1724 dmi_check_system(acpi_dmi_table_late); 1725 1726 /* 1727 * If acpi_disabled, bail out 1728 */ 1729 if (acpi_disabled) 1730 return 1; 1731 1732 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1733 1734 /* 1735 * set sci_int and PM timer address 1736 */ 1737 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1738 1739 /* 1740 * Process the Multiple APIC Description Table (MADT), if present 1741 */ 1742 acpi_process_madt(); 1743 1744 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1745 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1746 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1747 1748 if (!acpi_noirq) 1749 x86_init.pci.init = pci_acpi_init; 1750 1751 /* Do not enable ACPI SPCR console by default */ 1752 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1753 return 0; 1754 } 1755 1756 static int __init parse_acpi(char *arg) 1757 { 1758 if (!arg) 1759 return -EINVAL; 1760 1761 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1762 if (strcmp(arg, "off") == 0) { 1763 disable_acpi(); 1764 } 1765 /* acpi=force to over-ride black-list */ 1766 else if (strcmp(arg, "force") == 0) { 1767 acpi_force = 1; 1768 acpi_disabled = 0; 1769 } 1770 /* acpi=strict disables out-of-spec workarounds */ 1771 else if (strcmp(arg, "strict") == 0) { 1772 acpi_strict = 1; 1773 } 1774 /* acpi=rsdt use RSDT instead of XSDT */ 1775 else if (strcmp(arg, "rsdt") == 0) { 1776 acpi_gbl_do_not_use_xsdt = TRUE; 1777 } 1778 /* "acpi=noirq" disables ACPI interrupt routing */ 1779 else if (strcmp(arg, "noirq") == 0) { 1780 acpi_noirq_set(); 1781 } 1782 /* "acpi=copy_dsdt" copies DSDT */ 1783 else if (strcmp(arg, "copy_dsdt") == 0) { 1784 acpi_gbl_copy_dsdt_locally = 1; 1785 } 1786 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1787 else if (strcmp(arg, "nocmcff") == 0) { 1788 acpi_disable_cmcff = 1; 1789 } else { 1790 /* Core will printk when we return error. */ 1791 return -EINVAL; 1792 } 1793 return 0; 1794 } 1795 early_param("acpi", parse_acpi); 1796 1797 static int __init parse_acpi_bgrt(char *arg) 1798 { 1799 acpi_nobgrt = true; 1800 return 0; 1801 } 1802 early_param("bgrt_disable", parse_acpi_bgrt); 1803 1804 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1805 static int __init parse_pci(char *arg) 1806 { 1807 if (arg && strcmp(arg, "noacpi") == 0) 1808 acpi_disable_pci(); 1809 return 0; 1810 } 1811 early_param("pci", parse_pci); 1812 1813 int __init acpi_mps_check(void) 1814 { 1815 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1816 /* mptable code is not built-in*/ 1817 if (acpi_disabled || acpi_noirq) { 1818 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1819 return 1; 1820 } 1821 #endif 1822 return 0; 1823 } 1824 1825 #ifdef CONFIG_X86_IO_APIC 1826 static int __init parse_acpi_skip_timer_override(char *arg) 1827 { 1828 acpi_skip_timer_override = 1; 1829 return 0; 1830 } 1831 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1832 1833 static int __init parse_acpi_use_timer_override(char *arg) 1834 { 1835 acpi_use_timer_override = 1; 1836 return 0; 1837 } 1838 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1839 #endif /* CONFIG_X86_IO_APIC */ 1840 1841 static int __init setup_acpi_sci(char *s) 1842 { 1843 if (!s) 1844 return -EINVAL; 1845 if (!strcmp(s, "edge")) 1846 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1847 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1848 else if (!strcmp(s, "level")) 1849 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1850 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1851 else if (!strcmp(s, "high")) 1852 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1853 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1854 else if (!strcmp(s, "low")) 1855 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1856 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1857 else 1858 return -EINVAL; 1859 return 0; 1860 } 1861 early_param("acpi_sci", setup_acpi_sci); 1862 1863 int __acpi_acquire_global_lock(unsigned int *lock) 1864 { 1865 unsigned int old, new, val; 1866 1867 old = READ_ONCE(*lock); 1868 do { 1869 val = (old >> 1) & 0x1; 1870 new = (old & ~0x3) + 2 + val; 1871 } while (!try_cmpxchg(lock, &old, new)); 1872 1873 if (val) 1874 return 0; 1875 1876 return -1; 1877 } 1878 1879 int __acpi_release_global_lock(unsigned int *lock) 1880 { 1881 unsigned int old, new; 1882 1883 old = READ_ONCE(*lock); 1884 do { 1885 new = old & ~0x3; 1886 } while (!try_cmpxchg(lock, &old, new)); 1887 return old & 0x1; 1888 } 1889 1890 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1891 { 1892 e820__range_add(addr, size, E820_TYPE_NVS); 1893 e820__update_table_print(); 1894 } 1895 1896 void x86_default_set_root_pointer(u64 addr) 1897 { 1898 boot_params.acpi_rsdp_addr = addr; 1899 } 1900 1901 u64 x86_default_get_root_pointer(void) 1902 { 1903 return boot_params.acpi_rsdp_addr; 1904 } 1905