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