arch/x86/kernel/acpi/boot.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
   4  *
   5  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   6  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
   7  */
   8 #define pr_fmt(fmt) "ACPI: " fmt
   9
  10 #include <linux/init.h>
  11 #include <linux/acpi.h>
  12 #include <linux/acpi_pmtmr.h>
  13 #include <linux/efi.h>
  14 #include <linux/cpumask.h>
  15 #include <linux/export.h>
  16 #include <linux/dmi.h>
  17 #include <linux/irq.h>
  18 #include <linux/slab.h>
  19 #include <linux/memblock.h>
  20 #include <linux/ioport.h>
  21 #include <linux/pci.h>
  22 #include <linux/efi-bgrt.h>
  23 #include <linux/serial_core.h>
  24 #include <linux/pgtable.h>
  25
  26 #include <asm/e820/api.h>
  27 #include <asm/irqdomain.h>
  28 #include <asm/pci_x86.h>
  29 #include <asm/io_apic.h>
  30 #include <asm/apic.h>
  31 #include <asm/io.h>
  32 #include <asm/mpspec.h>
  33 #include <asm/smp.h>
  34 #include <asm/i8259.h>
  35 #include <asm/setup.h>
  36
  37 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
  38 static int __initdata acpi_force = 0;
  39 int acpi_disabled;
  40 EXPORT_SYMBOL(acpi_disabled);
  41
  42 #ifdef  CONFIG_X86_64
  43 # include <asm/proto.h>
  44 #endif                          /* X86 */
  45
  46 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  47 static int acpi_nobgrt;                 /* skip ACPI BGRT */
  48 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  49 EXPORT_SYMBOL(acpi_pci_disabled);
  50
  51 int acpi_lapic;
  52 int acpi_ioapic;
  53 int acpi_strict;
  54 int acpi_disable_cmcff;
  55 bool acpi_int_src_ovr[NR_IRQS_LEGACY];
  56
  57 /* ACPI SCI override configuration */
  58 u8 acpi_sci_flags __initdata;
  59 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
  60 int acpi_skip_timer_override __initdata;
  61 int acpi_use_timer_override __initdata;
  62 int acpi_fix_pin2_polarity __initdata;
  63
  64 #ifdef CONFIG_X86_LOCAL_APIC
  65 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  66 static bool has_lapic_cpus __initdata;
  67 static bool acpi_support_online_capable;
  68 #endif
  69
  70 #ifdef CONFIG_X86_IO_APIC
  71 /*
  72  * Locks related to IOAPIC hotplug
  73  * Hotplug side:
  74  *      ->device_hotplug_lock
  75  *              ->acpi_ioapic_lock
  76  *                      ->ioapic_lock
  77  * Interrupt mapping side:
  78  *      ->acpi_ioapic_lock
  79  *              ->ioapic_mutex
  80  *                      ->ioapic_lock
  81  */
  82 static DEFINE_MUTEX(acpi_ioapic_lock);
  83 #endif
  84
  85 /* --------------------------------------------------------------------------
  86                               Boot-time Configuration
  87    -------------------------------------------------------------------------- */
  88
  89 /*
  90  * The default interrupt routing model is PIC (8259).  This gets
  91  * overridden if IOAPICs are enumerated (below).
  92  */
  93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  94
  95
  96 /*
  97  * ISA irqs by default are the first 16 gsis but can be
  98  * any gsi as specified by an interrupt source override.
  99  */
 100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 101         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 102 };
 103
 104 /*
 105  * This is just a simple wrapper around early_memremap(),
 106  * with sanity checks for phys == 0 and size == 0.
 107  */
 108 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
 109 {
 110
 111         if (!phys || !size)
 112                 return NULL;
 113
 114         return early_memremap(phys, size);
 115 }
 116
 117 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
 118 {
 119         if (!map || !size)
 120                 return;
 121
 122         early_memunmap(map, size);
 123 }
 124
 125 #ifdef CONFIG_X86_LOCAL_APIC
 126 static int __init acpi_parse_madt(struct acpi_table_header *table)
 127 {
 128         struct acpi_table_madt *madt = NULL;
 129
 130         if (!boot_cpu_has(X86_FEATURE_APIC))
 131                 return -EINVAL;
 132
 133         madt = (struct acpi_table_madt *)table;
 134         if (!madt) {
 135                 pr_warn("Unable to map MADT\n");
 136                 return -ENODEV;
 137         }
 138
 139         if (madt->address) {
 140                 acpi_lapic_addr = (u64) madt->address;
 141
 142                 pr_debug("Local APIC address 0x%08x\n", madt->address);
 143         }
 144
 145         if (madt->flags & ACPI_MADT_PCAT_COMPAT)
 146                 legacy_pic_pcat_compat();
 147
 148         /* ACPI 6.3 and newer support the online capable bit. */
 149         if (acpi_gbl_FADT.header.revision > 6 ||
 150             (acpi_gbl_FADT.header.revision == 6 &&
 151              acpi_gbl_FADT.minor_revision >= 3))
 152                 acpi_support_online_capable = true;
 153
 154         default_acpi_madt_oem_check(madt->header.oem_id,
 155                                     madt->header.oem_table_id);
 156
 157         return 0;
 158 }
 159
 160 static bool __init acpi_is_processor_usable(u32 lapic_flags)
 161 {
 162         if (lapic_flags & ACPI_MADT_ENABLED)
 163                 return true;
 164
 165         if (!acpi_support_online_capable ||
 166             (lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
 167                 return true;
 168
 169         return false;
 170 }
 171
 172 static int __init
 173 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
 174 {
 175         struct acpi_madt_local_x2apic *processor = NULL;
 176 #ifdef CONFIG_X86_X2APIC
 177         u32 apic_id;
 178         u8 enabled;
 179 #endif
 180
 181         processor = (struct acpi_madt_local_x2apic *)header;
 182
 183         if (BAD_MADT_ENTRY(processor, end))
 184                 return -EINVAL;
 185
 186         acpi_table_print_madt_entry(&header->common);
 187
 188 #ifdef CONFIG_X86_X2APIC
 189         apic_id = processor->local_apic_id;
 190         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
 191
 192         /* Ignore invalid ID */
 193         if (apic_id == 0xffffffff)
 194                 return 0;
 195
 196         /* don't register processors that cannot be onlined */
 197         if (!acpi_is_processor_usable(processor->lapic_flags))
 198                 return 0;
 199
 200         /*
 201          * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure
 202          * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID
 203          * in x2APIC must be equal or greater than 0xff.
 204          */
 205         if (has_lapic_cpus && apic_id < 0xff)
 206                 return 0;
 207
 208         /*
 209          * We need to register disabled CPU as well to permit
 210          * counting disabled CPUs. This allows us to size
 211          * cpus_possible_map more accurately, to permit
 212          * to not preallocating memory for all NR_CPUS
 213          * when we use CPU hotplug.
 214          */
 215         if (!apic_id_valid(apic_id)) {
 216                 if (enabled)
 217                         pr_warn("x2apic entry ignored\n");
 218                 return 0;
 219         }
 220
 221         topology_register_apic(apic_id, processor->uid, enabled);
 222 #else
 223         pr_warn("x2apic entry ignored\n");
 224 #endif
 225
 226         return 0;
 227 }
 228
 229 static int __init
 230 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
 231 {
 232         struct acpi_madt_local_apic *processor = NULL;
 233
 234         processor = (struct acpi_madt_local_apic *)header;
 235
 236         if (BAD_MADT_ENTRY(processor, end))
 237                 return -EINVAL;
 238
 239         acpi_table_print_madt_entry(&header->common);
 240
 241         /* Ignore invalid ID */
 242         if (processor->id == 0xff)
 243                 return 0;
 244
 245         /* don't register processors that can not be onlined */
 246         if (!acpi_is_processor_usable(processor->lapic_flags))
 247                 return 0;
 248
 249         /*
 250          * We need to register disabled CPU as well to permit
 251          * counting disabled CPUs. This allows us to size
 252          * cpus_possible_map more accurately, to permit
 253          * to not preallocating memory for all NR_CPUS
 254          * when we use CPU hotplug.
 255          */
 256         topology_register_apic(processor->id,   /* APIC ID */
 257                                processor->processor_id, /* ACPI ID */
 258                                processor->lapic_flags & ACPI_MADT_ENABLED);
 259
 260         has_lapic_cpus = true;
 261         return 0;
 262 }
 263
 264 static int __init
 265 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
 266 {
 267         struct acpi_madt_local_sapic *processor = NULL;
 268
 269         processor = (struct acpi_madt_local_sapic *)header;
 270
 271         if (BAD_MADT_ENTRY(processor, end))
 272                 return -EINVAL;
 273
 274         acpi_table_print_madt_entry(&header->common);
 275
 276         topology_register_apic((processor->id << 8) | processor->eid,/* APIC ID */
 277                                processor->processor_id, /* ACPI ID */
 278                                processor->lapic_flags & ACPI_MADT_ENABLED);
 279
 280         return 0;
 281 }
 282
 283 static int __init
 284 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
 285                           const unsigned long end)
 286 {
 287         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 288
 289         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 290
 291         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 292                 return -EINVAL;
 293
 294         acpi_table_print_madt_entry(&header->common);
 295
 296         acpi_lapic_addr = lapic_addr_ovr->address;
 297
 298         return 0;
 299 }
 300
 301 static int __init
 302 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
 303                       const unsigned long end)
 304 {
 305         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 306
 307         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 308
 309         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 310                 return -EINVAL;
 311
 312         acpi_table_print_madt_entry(&header->common);
 313
 314         if (x2apic_nmi->lint != 1)
 315                 pr_warn("NMI not connected to LINT 1!\n");
 316
 317         return 0;
 318 }
 319
 320 static int __init
 321 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
 322 {
 323         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 324
 325         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 326
 327         if (BAD_MADT_ENTRY(lapic_nmi, end))
 328                 return -EINVAL;
 329
 330         acpi_table_print_madt_entry(&header->common);
 331
 332         if (lapic_nmi->lint != 1)
 333                 pr_warn("NMI not connected to LINT 1!\n");
 334
 335         return 0;
 336 }
 337 #endif /* CONFIG_X86_LOCAL_APIC */
 338
 339 #ifdef CONFIG_X86_IO_APIC
 340 #define MP_ISA_BUS              0
 341
 342 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
 343                                                 u8 trigger, u32 gsi);
 344
 345 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
 346                                           u32 gsi)
 347 {
 348         /*
 349          * Check bus_irq boundary.
 350          */
 351         if (bus_irq >= NR_IRQS_LEGACY) {
 352                 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
 353                 return;
 354         }
 355
 356         /*
 357          * TBD: This check is for faulty timer entries, where the override
 358          *      erroneously sets the trigger to level, resulting in a HUGE
 359          *      increase of timer interrupts!
 360          */
 361         if ((bus_irq == 0) && (trigger == 3))
 362                 trigger = 1;
 363
 364         if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
 365                 return;
 366         /*
 367          * Reset default identity mapping if gsi is also an legacy IRQ,
 368          * otherwise there will be more than one entry with the same GSI
 369          * and acpi_isa_irq_to_gsi() may give wrong result.
 370          */
 371         if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
 372                 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
 373         isa_irq_to_gsi[bus_irq] = gsi;
 374 }
 375
 376 static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 377                         int polarity)
 378 {
 379 #ifdef CONFIG_X86_MPPARSE
 380         struct mpc_intsrc mp_irq;
 381         struct pci_dev *pdev;
 382         unsigned char number;
 383         unsigned int devfn;
 384         int ioapic;
 385         u8 pin;
 386
 387         if (!acpi_ioapic)
 388                 return;
 389         if (!dev || !dev_is_pci(dev))
 390                 return;
 391
 392         pdev = to_pci_dev(dev);
 393         number = pdev->bus->number;
 394         devfn = pdev->devfn;
 395         pin = pdev->pin;
 396         /* print the entry should happen on mptable identically */
 397         mp_irq.type = MP_INTSRC;
 398         mp_irq.irqtype = mp_INT;
 399         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
 400                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
 401         mp_irq.srcbus = number;
 402         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
 403         ioapic = mp_find_ioapic(gsi);
 404         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 405         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
 406
 407         mp_save_irq(&mp_irq);
 408 #endif
 409 }
 410
 411 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
 412                                                 u8 trigger, u32 gsi)
 413 {
 414         struct mpc_intsrc mp_irq;
 415         int ioapic, pin;
 416
 417         /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
 418         ioapic = mp_find_ioapic(gsi);
 419         if (ioapic < 0) {
 420                 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
 421                 return ioapic;
 422         }
 423
 424         pin = mp_find_ioapic_pin(ioapic, gsi);
 425
 426         mp_irq.type = MP_INTSRC;
 427         mp_irq.irqtype = mp_INT;
 428         mp_irq.irqflag = (trigger << 2) | polarity;
 429         mp_irq.srcbus = MP_ISA_BUS;
 430         mp_irq.srcbusirq = bus_irq;
 431         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 432         mp_irq.dstirq = pin;
 433
 434         mp_save_irq(&mp_irq);
 435
 436         return 0;
 437 }
 438
 439 static int __init
 440 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
 441 {
 442         struct acpi_madt_io_apic *ioapic = NULL;
 443         struct ioapic_domain_cfg cfg = {
 444                 .type = IOAPIC_DOMAIN_DYNAMIC,
 445                 .ops = &mp_ioapic_irqdomain_ops,
 446         };
 447
 448         ioapic = (struct acpi_madt_io_apic *)header;
 449
 450         if (BAD_MADT_ENTRY(ioapic, end))
 451                 return -EINVAL;
 452
 453         acpi_table_print_madt_entry(&header->common);
 454
 455         /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
 456         if (ioapic->global_irq_base < nr_legacy_irqs())
 457                 cfg.type = IOAPIC_DOMAIN_LEGACY;
 458
 459         mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
 460                            &cfg);
 461
 462         return 0;
 463 }
 464
 465 /*
 466  * Parse Interrupt Source Override for the ACPI SCI
 467  */
 468 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 469 {
 470         if (trigger == 0)       /* compatible SCI trigger is level */
 471                 trigger = 3;
 472
 473         if (polarity == 0)      /* compatible SCI polarity is low */
 474                 polarity = 3;
 475
 476         /* Command-line over-ride via acpi_sci= */
 477         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 478                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 479
 480         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 481                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 482
 483         if (bus_irq < NR_IRQS_LEGACY)
 484                 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 485         else
 486                 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
 487
 488         acpi_penalize_sci_irq(bus_irq, trigger, polarity);
 489
 490         /*
 491          * stash over-ride to indicate we've been here
 492          * and for later update of acpi_gbl_FADT
 493          */
 494         acpi_sci_override_gsi = gsi;
 495         return;
 496 }
 497
 498 static int __init
 499 acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
 500                        const unsigned long end)
 501 {
 502         struct acpi_madt_interrupt_override *intsrc = NULL;
 503
 504         intsrc = (struct acpi_madt_interrupt_override *)header;
 505
 506         if (BAD_MADT_ENTRY(intsrc, end))
 507                 return -EINVAL;
 508
 509         acpi_table_print_madt_entry(&header->common);
 510
 511         if (intsrc->source_irq < NR_IRQS_LEGACY)
 512                 acpi_int_src_ovr[intsrc->source_irq] = true;
 513
 514         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 515                 acpi_sci_ioapic_setup(intsrc->source_irq,
 516                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 517                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 518                                       intsrc->global_irq);
 519                 return 0;
 520         }
 521
 522         if (intsrc->source_irq == 0) {
 523                 if (acpi_skip_timer_override) {
 524                         pr_warn("BIOS IRQ0 override ignored.\n");
 525                         return 0;
 526                 }
 527
 528                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
 529                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 530                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 531                         pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 532                 }
 533         }
 534
 535         mp_override_legacy_irq(intsrc->source_irq,
 536                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 537                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 538                                 intsrc->global_irq);
 539
 540         return 0;
 541 }
 542
 543 static int __init
 544 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
 545 {
 546         struct acpi_madt_nmi_source *nmi_src = NULL;
 547
 548         nmi_src = (struct acpi_madt_nmi_source *)header;
 549
 550         if (BAD_MADT_ENTRY(nmi_src, end))
 551                 return -EINVAL;
 552
 553         acpi_table_print_madt_entry(&header->common);
 554
 555         /* TBD: Support nimsrc entries? */
 556
 557         return 0;
 558 }
 559
 560 #endif                          /* CONFIG_X86_IO_APIC */
 561
 562 /*
 563  * acpi_pic_sci_set_trigger()
 564  *
 565  * use ELCR to set PIC-mode trigger type for SCI
 566  *
 567  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 568  * it may require Edge Trigger -- use "acpi_sci=edge"
 569  *
 570  * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers
 571  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 572  * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 573  * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 574  */
 575
 576 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 577 {
 578         unsigned int mask = 1 << irq;
 579         unsigned int old, new;
 580
 581         /* Real old ELCR mask */
 582         old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
 583
 584         /*
 585          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 586          * since we will set it correctly as we enable the PCI irq
 587          * routing.
 588          */
 589         new = acpi_noirq ? old : 0;
 590
 591         /*
 592          * Update SCI information in the ELCR, it isn't in the PCI
 593          * routing tables..
 594          */
 595         switch (trigger) {
 596         case 1:         /* Edge - clear */
 597                 new &= ~mask;
 598                 break;
 599         case 3:         /* Level - set */
 600                 new |= mask;
 601                 break;
 602         }
 603
 604         if (old == new)
 605                 return;
 606
 607         pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
 608         outb(new, PIC_ELCR1);
 609         outb(new >> 8, PIC_ELCR2);
 610 }
 611
 612 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 613 {
 614         int rc, irq, trigger, polarity;
 615
 616         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 617                 *irqp = gsi;
 618                 return 0;
 619         }
 620
 621         rc = acpi_get_override_irq(gsi, &trigger, &polarity);
 622         if (rc)
 623                 return rc;
 624
 625         trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 626         polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 627         irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
 628         if (irq < 0)
 629                 return irq;
 630
 631         *irqp = irq;
 632         return 0;
 633 }
 634 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 635
 636 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 637 {
 638         if (isa_irq < nr_legacy_irqs() &&
 639             isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
 640                 *gsi = isa_irq_to_gsi[isa_irq];
 641                 return 0;
 642         }
 643
 644         return -1;
 645 }
 646
 647 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 648                                  int trigger, int polarity)
 649 {
 650 #ifdef CONFIG_PCI
 651         /*
 652          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 653          */
 654         if (trigger == ACPI_LEVEL_SENSITIVE)
 655                 elcr_set_level_irq(gsi);
 656 #endif
 657
 658         return gsi;
 659 }
 660
 661 #ifdef CONFIG_X86_LOCAL_APIC
 662 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 663                                     int trigger, int polarity)
 664 {
 665         int irq = gsi;
 666 #ifdef CONFIG_X86_IO_APIC
 667         int node;
 668         struct irq_alloc_info info;
 669
 670         node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
 671         trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
 672         polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
 673         ioapic_set_alloc_attr(&info, node, trigger, polarity);
 674
 675         mutex_lock(&acpi_ioapic_lock);
 676         irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
 677         /* Don't set up the ACPI SCI because it's already set up */
 678         if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
 679                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
 680         mutex_unlock(&acpi_ioapic_lock);
 681 #endif
 682
 683         return irq;
 684 }
 685
 686 static void acpi_unregister_gsi_ioapic(u32 gsi)
 687 {
 688 #ifdef CONFIG_X86_IO_APIC
 689         int irq;
 690
 691         mutex_lock(&acpi_ioapic_lock);
 692         irq = mp_map_gsi_to_irq(gsi, 0, NULL);
 693         if (irq > 0)
 694                 mp_unmap_irq(irq);
 695         mutex_unlock(&acpi_ioapic_lock);
 696 #endif
 697 }
 698 #endif
 699
 700 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 701                            int trigger, int polarity) = acpi_register_gsi_pic;
 702 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 703
 704 #ifdef CONFIG_ACPI_SLEEP
 705 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 706 #else
 707 int (*acpi_suspend_lowlevel)(void);
 708 #endif
 709
 710 /*
 711  * success: return IRQ number (>=0)
 712  * failure: return < 0
 713  */
 714 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 715 {
 716         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 717 }
 718 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 719
 720 void acpi_unregister_gsi(u32 gsi)
 721 {
 722         if (__acpi_unregister_gsi)
 723                 __acpi_unregister_gsi(gsi);
 724 }
 725 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 726
 727 #ifdef CONFIG_X86_LOCAL_APIC
 728 static void __init acpi_set_irq_model_ioapic(void)
 729 {
 730         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 731         __acpi_register_gsi = acpi_register_gsi_ioapic;
 732         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 733         acpi_ioapic = 1;
 734 }
 735 #endif
 736
 737 /*
 738  *  ACPI based hotplug support for CPU
 739  */
 740 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 741 #include <acpi/processor.h>
 742
 743 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 744 {
 745 #ifdef CONFIG_ACPI_NUMA
 746         int nid;
 747
 748         nid = acpi_get_node(handle);
 749         if (nid != NUMA_NO_NODE) {
 750                 set_apicid_to_node(physid, nid);
 751                 numa_set_node(cpu, nid);
 752         }
 753 #endif
 754         return 0;
 755 }
 756
 757 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu)
 758 {
 759         int cpu = topology_hotplug_apic(physid, acpi_id);
 760
 761         if (cpu < 0) {
 762                 pr_info("Unable to map lapic to logical cpu number\n");
 763                 return cpu;
 764         }
 765
 766         acpi_processor_set_pdc(handle);
 767         acpi_map_cpu2node(handle, cpu, physid);
 768
 769         *pcpu = cpu;
 770         return 0;
 771 }
 772 EXPORT_SYMBOL(acpi_map_cpu);
 773
 774 int acpi_unmap_cpu(int cpu)
 775 {
 776 #ifdef CONFIG_ACPI_NUMA
 777         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 778 #endif
 779         topology_hotunplug_apic(cpu);
 780         return 0;
 781 }
 782 EXPORT_SYMBOL(acpi_unmap_cpu);
 783 #endif  /* CONFIG_ACPI_HOTPLUG_CPU */
 784
 785 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 786 {
 787         int ret = -ENOSYS;
 788 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 789         int ioapic_id;
 790         u64 addr;
 791         struct ioapic_domain_cfg cfg = {
 792                 .type = IOAPIC_DOMAIN_DYNAMIC,
 793                 .ops = &mp_ioapic_irqdomain_ops,
 794         };
 795
 796         ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
 797         if (ioapic_id < 0) {
 798                 unsigned long long uid;
 799                 acpi_status status;
 800
 801                 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
 802                                                NULL, &uid);
 803                 if (ACPI_FAILURE(status)) {
 804                         acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
 805                         return -EINVAL;
 806                 }
 807                 ioapic_id = (int)uid;
 808         }
 809
 810         mutex_lock(&acpi_ioapic_lock);
 811         ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
 812         mutex_unlock(&acpi_ioapic_lock);
 813 #endif
 814
 815         return ret;
 816 }
 817 EXPORT_SYMBOL(acpi_register_ioapic);
 818
 819 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 820 {
 821         int ret = -ENOSYS;
 822
 823 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 824         mutex_lock(&acpi_ioapic_lock);
 825         ret  = mp_unregister_ioapic(gsi_base);
 826         mutex_unlock(&acpi_ioapic_lock);
 827 #endif
 828
 829         return ret;
 830 }
 831 EXPORT_SYMBOL(acpi_unregister_ioapic);
 832
 833 /**
 834  * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base
 835  *                          has been registered
 836  * @handle:     ACPI handle of the IOAPIC device
 837  * @gsi_base:   GSI base associated with the IOAPIC
 838  *
 839  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
 840  * with acpi_register_ioapic()/acpi_unregister_ioapic().
 841  */
 842 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 843 {
 844         int ret = 0;
 845
 846 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 847         mutex_lock(&acpi_ioapic_lock);
 848         ret  = mp_ioapic_registered(gsi_base);
 849         mutex_unlock(&acpi_ioapic_lock);
 850 #endif
 851
 852         return ret;
 853 }
 854
 855 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 856 {
 857         struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 858
 859         sbf_port = sb->cmos_index;      /* Save CMOS port */
 860
 861         return 0;
 862 }
 863
 864 #ifdef CONFIG_HPET_TIMER
 865 #include <asm/hpet.h>
 866
 867 static struct resource *hpet_res __initdata;
 868
 869 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 870 {
 871         struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 872
 873         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 874                 pr_warn("HPET timers must be located in memory.\n");
 875                 return -1;
 876         }
 877
 878         hpet_address = hpet_tbl->address.address;
 879         hpet_blockid = hpet_tbl->sequence;
 880
 881         /*
 882          * Some broken BIOSes advertise HPET at 0x0. We really do not
 883          * want to allocate a resource there.
 884          */
 885         if (!hpet_address) {
 886                 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address);
 887                 return 0;
 888         }
 889 #ifdef CONFIG_X86_64
 890         /*
 891          * Some even more broken BIOSes advertise HPET at
 892          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 893          * some noise:
 894          */
 895         if (hpet_address == 0xfed0000000000000UL) {
 896                 if (!hpet_force_user) {
 897                         pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n",
 898                                 hpet_tbl->id);
 899                         hpet_address = 0;
 900                         return 0;
 901                 }
 902                 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n",
 903                         hpet_tbl->id);
 904                 hpet_address >>= 32;
 905         }
 906 #endif
 907         pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address);
 908
 909         /*
 910          * Allocate and initialize the HPET firmware resource for adding into
 911          * the resource tree during the lateinit timeframe.
 912          */
 913 #define HPET_RESOURCE_NAME_SIZE 9
 914         hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
 915                                   SMP_CACHE_BYTES);
 916         if (!hpet_res)
 917                 panic("%s: Failed to allocate %zu bytes\n", __func__,
 918                       sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 919
 920         hpet_res->name = (void *)&hpet_res[1];
 921         hpet_res->flags = IORESOURCE_MEM;
 922         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 923                  hpet_tbl->sequence);
 924
 925         hpet_res->start = hpet_address;
 926         hpet_res->end = hpet_address + (1 * 1024) - 1;
 927
 928         return 0;
 929 }
 930
 931 /*
 932  * hpet_insert_resource inserts the HPET resources used into the resource
 933  * tree.
 934  */
 935 static __init int hpet_insert_resource(void)
 936 {
 937         if (!hpet_res)
 938                 return 1;
 939
 940         return insert_resource(&iomem_resource, hpet_res);
 941 }
 942
 943 late_initcall(hpet_insert_resource);
 944
 945 #else
 946 #define acpi_parse_hpet NULL
 947 #endif
 948
 949 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 950 {
 951         if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
 952                 pr_debug("no legacy devices present\n");
 953                 x86_platform.legacy.devices.pnpbios = 0;
 954         }
 955
 956         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
 957             !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
 958             x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
 959                 pr_debug("i8042 controller is absent\n");
 960                 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
 961         }
 962
 963         if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
 964                 pr_debug("not registering RTC platform device\n");
 965                 x86_platform.legacy.rtc = 0;
 966         }
 967
 968         if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
 969                 pr_debug("probing for VGA not safe\n");
 970                 x86_platform.legacy.no_vga = 1;
 971         }
 972
 973 #ifdef CONFIG_X86_PM_TIMER
 974         /* detect the location of the ACPI PM Timer */
 975         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 976                 /* FADT rev. 2 */
 977                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 978                     ACPI_ADR_SPACE_SYSTEM_IO)
 979                         return 0;
 980
 981                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 982                 /*
 983                  * "X" fields are optional extensions to the original V1.0
 984                  * fields, so we must selectively expand V1.0 fields if the
 985                  * corresponding X field is zero.
 986                  */
 987                 if (!pmtmr_ioport)
 988                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 989         } else {
 990                 /* FADT rev. 1 */
 991                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 992         }
 993         if (pmtmr_ioport)
 994                 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport);
 995 #endif
 996         return 0;
 997 }
 998
 999 #ifdef  CONFIG_X86_LOCAL_APIC
1000 /*
1001  * Parse LAPIC entries in MADT
1002  * returns 0 on success, < 0 on error
1003  */
1004
1005 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1006 {
1007         int count;
1008
1009         if (!boot_cpu_has(X86_FEATURE_APIC))
1010                 return -ENODEV;
1011
1012         /*
1013          * Note that the LAPIC address is obtained from the MADT (32-bit value)
1014          * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1015          */
1016
1017         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1018                                       acpi_parse_lapic_addr_ovr, 0);
1019         if (count < 0) {
1020                 pr_err("Error parsing LAPIC address override entry\n");
1021                 return count;
1022         }
1023
1024         register_lapic_address(acpi_lapic_addr);
1025
1026         return count;
1027 }
1028
1029 static int __init acpi_parse_madt_lapic_entries(void)
1030 {
1031         int count, x2count = 0;
1032
1033         if (!boot_cpu_has(X86_FEATURE_APIC))
1034                 return -ENODEV;
1035
1036         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1037                                       acpi_parse_sapic, MAX_LOCAL_APIC);
1038
1039         if (!count) {
1040                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
1041                                         acpi_parse_lapic, MAX_LOCAL_APIC);
1042                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
1043                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
1044         }
1045         if (!count && !x2count) {
1046                 pr_err("No LAPIC entries present\n");
1047                 /* TBD: Cleanup to allow fallback to MPS */
1048                 return -ENODEV;
1049         } else if (count < 0 || x2count < 0) {
1050                 pr_err("Error parsing LAPIC entry\n");
1051                 /* TBD: Cleanup to allow fallback to MPS */
1052                 return count;
1053         }
1054
1055         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1056                                         acpi_parse_x2apic_nmi, 0);
1057         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1058                                       acpi_parse_lapic_nmi, 0);
1059         if (count < 0 || x2count < 0) {
1060                 pr_err("Error parsing LAPIC NMI entry\n");
1061                 /* TBD: Cleanup to allow fallback to MPS */
1062                 return count;
1063         }
1064         return 0;
1065 }
1066 #endif                          /* CONFIG_X86_LOCAL_APIC */
1067
1068 #ifdef  CONFIG_X86_IO_APIC
1069 static void __init mp_config_acpi_legacy_irqs(void)
1070 {
1071         int i;
1072         struct mpc_intsrc mp_irq;
1073
1074 #ifdef CONFIG_EISA
1075         /*
1076          * Fabricate the legacy ISA bus (bus #31).
1077          */
1078         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1079 #endif
1080         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1081         pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1082
1083         /*
1084          * Use the default configuration for the IRQs 0-15.  Unless
1085          * overridden by (MADT) interrupt source override entries.
1086          */
1087         for (i = 0; i < nr_legacy_irqs(); i++) {
1088                 int ioapic, pin;
1089                 unsigned int dstapic;
1090                 int idx;
1091                 u32 gsi;
1092
1093                 /* Locate the gsi that irq i maps to. */
1094                 if (acpi_isa_irq_to_gsi(i, &gsi))
1095                         continue;
1096
1097                 /*
1098                  * Locate the IOAPIC that manages the ISA IRQ.
1099                  */
1100                 ioapic = mp_find_ioapic(gsi);
1101                 if (ioapic < 0)
1102                         continue;
1103                 pin = mp_find_ioapic_pin(ioapic, gsi);
1104                 dstapic = mpc_ioapic_id(ioapic);
1105
1106                 for (idx = 0; idx < mp_irq_entries; idx++) {
1107                         struct mpc_intsrc *irq = mp_irqs + idx;
1108
1109                         /* Do we already have a mapping for this ISA IRQ? */
1110                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1111                                 break;
1112
1113                         /* Do we already have a mapping for this IOAPIC pin */
1114                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1115                                 break;
1116                 }
1117
1118                 if (idx != mp_irq_entries) {
1119                         pr_debug("ACPI: IRQ%d used by override.\n", i);
1120                         continue;       /* IRQ already used */
1121                 }
1122
1123                 mp_irq.type = MP_INTSRC;
1124                 mp_irq.irqflag = 0;     /* Conforming */
1125                 mp_irq.srcbus = MP_ISA_BUS;
1126                 mp_irq.dstapic = dstapic;
1127                 mp_irq.irqtype = mp_INT;
1128                 mp_irq.srcbusirq = i; /* Identity mapped */
1129                 mp_irq.dstirq = pin;
1130
1131                 mp_save_irq(&mp_irq);
1132         }
1133 }
1134
1135 /*
1136  * Parse IOAPIC related entries in MADT
1137  * returns 0 on success, < 0 on error
1138  */
1139 static int __init acpi_parse_madt_ioapic_entries(void)
1140 {
1141         int count;
1142
1143         /*
1144          * ACPI interpreter is required to complete interrupt setup,
1145          * so if it is off, don't enumerate the io-apics with ACPI.
1146          * If MPS is present, it will handle them,
1147          * otherwise the system will stay in PIC mode
1148          */
1149         if (acpi_disabled || acpi_noirq)
1150                 return -ENODEV;
1151
1152         if (!boot_cpu_has(X86_FEATURE_APIC))
1153                 return -ENODEV;
1154
1155         /*
1156          * if "noapic" boot option, don't look for IO-APICs
1157          */
1158         if (ioapic_is_disabled) {
1159                 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
1160                 return -ENODEV;
1161         }
1162
1163         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1164                                       MAX_IO_APICS);
1165         if (!count) {
1166                 pr_err("No IOAPIC entries present\n");
1167                 return -ENODEV;
1168         } else if (count < 0) {
1169                 pr_err("Error parsing IOAPIC entry\n");
1170                 return count;
1171         }
1172
1173         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1174                                       acpi_parse_int_src_ovr, nr_irqs);
1175         if (count < 0) {
1176                 pr_err("Error parsing interrupt source overrides entry\n");
1177                 /* TBD: Cleanup to allow fallback to MPS */
1178                 return count;
1179         }
1180
1181         /*
1182          * If BIOS did not supply an INT_SRC_OVR for the SCI
1183          * pretend we got one so we can set the SCI flags.
1184          * But ignore setting up SCI on hardware reduced platforms.
1185          */
1186         if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1187                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1188                                       acpi_gbl_FADT.sci_interrupt);
1189
1190         /* Fill in identity legacy mappings where no override */
1191         mp_config_acpi_legacy_irqs();
1192
1193         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1194                                       acpi_parse_nmi_src, nr_irqs);
1195         if (count < 0) {
1196                 pr_err("Error parsing NMI SRC entry\n");
1197                 /* TBD: Cleanup to allow fallback to MPS */
1198                 return count;
1199         }
1200
1201         return 0;
1202 }
1203 #else
1204 static inline int acpi_parse_madt_ioapic_entries(void)
1205 {
1206         return -1;
1207 }
1208 #endif  /* !CONFIG_X86_IO_APIC */
1209
1210 static void __init early_acpi_process_madt(void)
1211 {
1212 #ifdef CONFIG_X86_LOCAL_APIC
1213         int error;
1214
1215         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1216
1217                 /*
1218                  * Parse MADT LAPIC entries
1219                  */
1220                 error = early_acpi_parse_madt_lapic_addr_ovr();
1221                 if (!error) {
1222                         acpi_lapic = 1;
1223                         smp_found_config = 1;
1224                 }
1225                 if (error == -EINVAL) {
1226                         /*
1227                          * Dell Precision Workstation 410, 610 come here.
1228                          */
1229                         pr_err("Invalid BIOS MADT, disabling ACPI\n");
1230                         disable_acpi();
1231                 }
1232         }
1233 #endif
1234 }
1235
1236 static void __init acpi_process_madt(void)
1237 {
1238 #ifdef CONFIG_X86_LOCAL_APIC
1239         int error;
1240
1241         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1242
1243                 /*
1244                  * Parse MADT LAPIC entries
1245                  */
1246                 error = acpi_parse_madt_lapic_entries();
1247                 if (!error) {
1248                         acpi_lapic = 1;
1249
1250                         /*
1251                          * Parse MADT IO-APIC entries
1252                          */
1253                         mutex_lock(&acpi_ioapic_lock);
1254                         error = acpi_parse_madt_ioapic_entries();
1255                         mutex_unlock(&acpi_ioapic_lock);
1256                         if (!error) {
1257                                 acpi_set_irq_model_ioapic();
1258
1259                                 smp_found_config = 1;
1260                         }
1261
1262 #ifdef CONFIG_ACPI_MADT_WAKEUP
1263                         /*
1264                          * Parse MADT MP Wake entry.
1265                          */
1266                         acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP,
1267                                               acpi_parse_mp_wake, 1);
1268 #endif
1269                 }
1270                 if (error == -EINVAL) {
1271                         /*
1272                          * Dell Precision Workstation 410, 610 come here.
1273                          */
1274                         pr_err("Invalid BIOS MADT, disabling ACPI\n");
1275                         disable_acpi();
1276                 }
1277         } else {
1278                 /*
1279                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1280                  * In the event an MPS table was found, forget it.
1281                  * Boot with "acpi=off" to use MPS on such a system.
1282                  */
1283                 if (smp_found_config) {
1284                         pr_warn("No APIC-table, disabling MPS\n");
1285                         smp_found_config = 0;
1286                 }
1287         }
1288
1289         /*
1290          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1291          * processors, where MPS only supports physical.
1292          */
1293         if (acpi_lapic && acpi_ioapic)
1294                 pr_info("Using ACPI (MADT) for SMP configuration information\n");
1295         else if (acpi_lapic)
1296                 pr_info("Using ACPI for processor (LAPIC) configuration information\n");
1297 #endif
1298         return;
1299 }
1300
1301 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1302 {
1303         if (!acpi_force) {
1304                 pr_notice("%s detected: force use of acpi=noirq\n", d->ident);
1305                 acpi_noirq_set();
1306         }
1307         return 0;
1308 }
1309
1310 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1311 {
1312         if (!acpi_force) {
1313                 pr_notice("%s detected: force use of pci=noacpi\n", d->ident);
1314                 acpi_disable_pci();
1315         }
1316         return 0;
1317 }
1318
1319 static int __init disable_acpi_xsdt(const struct dmi_system_id *d)
1320 {
1321         if (!acpi_force) {
1322                 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident);
1323                 acpi_gbl_do_not_use_xsdt = TRUE;
1324         } else {
1325                 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n");
1326         }
1327         return 0;
1328 }
1329
1330 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1331 {
1332         if (!acpi_force) {
1333                 pr_notice("%s detected: acpi off\n", d->ident);
1334                 disable_acpi();
1335         } else {
1336                 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n");
1337         }
1338         return 0;
1339 }
1340
1341 /*
1342  * Force ignoring BIOS IRQ0 override
1343  */
1344 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1345 {
1346         if (!acpi_skip_timer_override) {
1347                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1348                         d->ident);
1349                 acpi_skip_timer_override = 1;
1350         }
1351         return 0;
1352 }
1353
1354 /*
1355  * ACPI offers an alternative platform interface model that removes
1356  * ACPI hardware requirements for platforms that do not implement
1357  * the PC Architecture.
1358  *
1359  * We initialize the Hardware-reduced ACPI model here:
1360  */
1361 void __init acpi_generic_reduced_hw_init(void)
1362 {
1363         /*
1364          * Override x86_init functions and bypass legacy PIC in
1365          * hardware reduced ACPI mode.
1366          */
1367         x86_init.timers.timer_init      = x86_init_noop;
1368         x86_init.irqs.pre_vector_init   = x86_init_noop;
1369         legacy_pic                      = &null_legacy_pic;
1370 }
1371
1372 static void __init acpi_reduced_hw_init(void)
1373 {
1374         if (acpi_gbl_reduced_hardware)
1375                 x86_init.acpi.reduced_hw_early_init();
1376 }
1377
1378 /*
1379  * If your system is blacklisted here, but you find that acpi=force
1380  * works for you, please contact linux-acpi@vger.kernel.org
1381  */
1382 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1383         /*
1384          * Boxes that need ACPI disabled
1385          */
1386         {
1387          .callback = dmi_disable_acpi,
1388          .ident = "IBM Thinkpad",
1389          .matches = {
1390                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1391                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1392                      },
1393          },
1394
1395         /*
1396          * Boxes that need ACPI PCI IRQ routing disabled
1397          */
1398         {
1399          .callback = disable_acpi_irq,
1400          .ident = "ASUS A7V",
1401          .matches = {
1402                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1403                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1404                      /* newer BIOS, Revision 1011, does work */
1405                      DMI_MATCH(DMI_BIOS_VERSION,
1406                                "ASUS A7V ACPI BIOS Revision 1007"),
1407                      },
1408          },
1409         {
1410                 /*
1411                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1412                  * for LPC bridge, which is needed for the PCI
1413                  * interrupt links to work. DSDT fix is in bug 5966.
1414                  * 2645, 2646 model numbers are shared with 600/600E/600X
1415                  */
1416          .callback = disable_acpi_irq,
1417          .ident = "IBM Thinkpad 600 Series 2645",
1418          .matches = {
1419                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1420                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1421                      },
1422          },
1423         {
1424          .callback = disable_acpi_irq,
1425          .ident = "IBM Thinkpad 600 Series 2646",
1426          .matches = {
1427                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1428                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1429                      },
1430          },
1431         /*
1432          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1433          */
1434         {                       /* _BBN 0 bug */
1435          .callback = disable_acpi_pci,
1436          .ident = "ASUS PR-DLS",
1437          .matches = {
1438                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1439                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1440                      DMI_MATCH(DMI_BIOS_VERSION,
1441                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1442                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1443                      },
1444          },
1445         {
1446          .callback = disable_acpi_pci,
1447          .ident = "Acer TravelMate 36x Laptop",
1448          .matches = {
1449                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1450                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1451                      },
1452          },
1453         /*
1454          * Boxes that need ACPI XSDT use disabled due to corrupted tables
1455          */
1456         {
1457          .callback = disable_acpi_xsdt,
1458          .ident = "Advantech DAC-BJ01",
1459          .matches = {
1460                      DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1461                      DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"),
1462                      DMI_MATCH(DMI_BIOS_VERSION, "V1.12"),
1463                      DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"),
1464                      },
1465          },
1466         {}
1467 };
1468
1469 /* second table for DMI checks that should run after early-quirks */
1470 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1471         /*
1472          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1473          * which includes some code which overrides all temperature
1474          * trip points to 16C if the INTIN2 input of the I/O APIC
1475          * is enabled.  This input is incorrectly designated the
1476          * ISA IRQ 0 via an interrupt source override even though
1477          * it is wired to the output of the master 8259A and INTIN0
1478          * is not connected at all.  Force ignoring BIOS IRQ0
1479          * override in that cases.
1480          */
1481         {
1482          .callback = dmi_ignore_irq0_timer_override,
1483          .ident = "HP nx6115 laptop",
1484          .matches = {
1485                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1487                      },
1488          },
1489         {
1490          .callback = dmi_ignore_irq0_timer_override,
1491          .ident = "HP NX6125 laptop",
1492          .matches = {
1493                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1494                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1495                      },
1496          },
1497         {
1498          .callback = dmi_ignore_irq0_timer_override,
1499          .ident = "HP NX6325 laptop",
1500          .matches = {
1501                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1502                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1503                      },
1504          },
1505         {
1506          .callback = dmi_ignore_irq0_timer_override,
1507          .ident = "HP 6715b laptop",
1508          .matches = {
1509                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1510                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1511                      },
1512          },
1513         {
1514          .callback = dmi_ignore_irq0_timer_override,
1515          .ident = "FUJITSU SIEMENS",
1516          .matches = {
1517                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1518                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1519                      },
1520          },
1521         {}
1522 };
1523
1524 /*
1525  * acpi_boot_table_init() and acpi_boot_init()
1526  *  called from setup_arch(), always.
1527  *      1. checksums all tables
1528  *      2. enumerates lapics
1529  *      3. enumerates io-apics
1530  *
1531  * acpi_table_init() is separate to allow reading SRAT without
1532  * other side effects.
1533  *
1534  * side effects of acpi_boot_init:
1535  *      acpi_lapic = 1 if LAPIC found
1536  *      acpi_ioapic = 1 if IOAPIC found
1537  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1538  *      if acpi_blacklisted() acpi_disabled = 1;
1539  *      acpi_irq_model=...
1540  *      ...
1541  */
1542
1543 void __init acpi_boot_table_init(void)
1544 {
1545         dmi_check_system(acpi_dmi_table);
1546
1547         /*
1548          * If acpi_disabled, bail out
1549          */
1550         if (acpi_disabled)
1551                 return;
1552
1553         /*
1554          * Initialize the ACPI boot-time table parser.
1555          */
1556         if (acpi_locate_initial_tables())
1557                 disable_acpi();
1558         else
1559                 acpi_reserve_initial_tables();
1560 }
1561
1562 int __init early_acpi_boot_init(void)
1563 {
1564         if (acpi_disabled)
1565                 return 1;
1566
1567         acpi_table_init_complete();
1568
1569         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1570
1571         /*
1572          * blacklist may disable ACPI entirely
1573          */
1574         if (acpi_blacklisted()) {
1575                 if (acpi_force) {
1576                         pr_warn("acpi=force override\n");
1577                 } else {
1578                         pr_warn("Disabling ACPI support\n");
1579                         disable_acpi();
1580                         return 1;
1581                 }
1582         }
1583
1584         /*
1585          * Process the Multiple APIC Description Table (MADT), if present
1586          */
1587         early_acpi_process_madt();
1588
1589         /*
1590          * Hardware-reduced ACPI mode initialization:
1591          */
1592         acpi_reduced_hw_init();
1593
1594         return 0;
1595 }
1596
1597 int __init acpi_boot_init(void)
1598 {
1599         /* those are executed after early-quirks are executed */
1600         dmi_check_system(acpi_dmi_table_late);
1601
1602         /*
1603          * If acpi_disabled, bail out
1604          */
1605         if (acpi_disabled)
1606                 return 1;
1607
1608         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1609
1610         /*
1611          * set sci_int and PM timer address
1612          */
1613         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1614
1615         /*
1616          * Process the Multiple APIC Description Table (MADT), if present
1617          */
1618         acpi_process_madt();
1619
1620         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1621         if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1622                 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1623
1624         if (!acpi_noirq)
1625                 x86_init.pci.init = pci_acpi_init;
1626
1627         /* Do not enable ACPI SPCR console by default */
1628         acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1629         return 0;
1630 }
1631
1632 static int __init parse_acpi(char *arg)
1633 {
1634         if (!arg)
1635                 return -EINVAL;
1636
1637         /* "acpi=off" disables both ACPI table parsing and interpreter */
1638         if (strcmp(arg, "off") == 0) {
1639                 disable_acpi();
1640         }
1641         /* acpi=force to over-ride black-list */
1642         else if (strcmp(arg, "force") == 0) {
1643                 acpi_force = 1;
1644                 acpi_disabled = 0;
1645         }
1646         /* acpi=strict disables out-of-spec workarounds */
1647         else if (strcmp(arg, "strict") == 0) {
1648                 acpi_strict = 1;
1649         }
1650         /* acpi=rsdt use RSDT instead of XSDT */
1651         else if (strcmp(arg, "rsdt") == 0) {
1652                 acpi_gbl_do_not_use_xsdt = TRUE;
1653         }
1654         /* "acpi=noirq" disables ACPI interrupt routing */
1655         else if (strcmp(arg, "noirq") == 0) {
1656                 acpi_noirq_set();
1657         }
1658         /* "acpi=copy_dsdt" copies DSDT */
1659         else if (strcmp(arg, "copy_dsdt") == 0) {
1660                 acpi_gbl_copy_dsdt_locally = 1;
1661         }
1662         /* "acpi=nocmcff" disables FF mode for corrected errors */
1663         else if (strcmp(arg, "nocmcff") == 0) {
1664                 acpi_disable_cmcff = 1;
1665         } else {
1666                 /* Core will printk when we return error. */
1667                 return -EINVAL;
1668         }
1669         return 0;
1670 }
1671 early_param("acpi", parse_acpi);
1672
1673 static int __init parse_acpi_bgrt(char *arg)
1674 {
1675         acpi_nobgrt = true;
1676         return 0;
1677 }
1678 early_param("bgrt_disable", parse_acpi_bgrt);
1679
1680 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1681 static int __init parse_pci(char *arg)
1682 {
1683         if (arg && strcmp(arg, "noacpi") == 0)
1684                 acpi_disable_pci();
1685         return 0;
1686 }
1687 early_param("pci", parse_pci);
1688
1689 int __init acpi_mps_check(void)
1690 {
1691 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1692 /* mptable code is not built-in*/
1693         if (acpi_disabled || acpi_noirq) {
1694                 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
1695                 return 1;
1696         }
1697 #endif
1698         return 0;
1699 }
1700
1701 #ifdef CONFIG_X86_IO_APIC
1702 static int __init parse_acpi_skip_timer_override(char *arg)
1703 {
1704         acpi_skip_timer_override = 1;
1705         return 0;
1706 }
1707 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1708
1709 static int __init parse_acpi_use_timer_override(char *arg)
1710 {
1711         acpi_use_timer_override = 1;
1712         return 0;
1713 }
1714 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1715 #endif /* CONFIG_X86_IO_APIC */
1716
1717 static int __init setup_acpi_sci(char *s)
1718 {
1719         if (!s)
1720                 return -EINVAL;
1721         if (!strcmp(s, "edge"))
1722                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1723                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1724         else if (!strcmp(s, "level"))
1725                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1726                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1727         else if (!strcmp(s, "high"))
1728                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1729                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1730         else if (!strcmp(s, "low"))
1731                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1732                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1733         else
1734                 return -EINVAL;
1735         return 0;
1736 }
1737 early_param("acpi_sci", setup_acpi_sci);
1738
1739 int __acpi_acquire_global_lock(unsigned int *lock)
1740 {
1741         unsigned int old, new, val;
1742
1743         old = READ_ONCE(*lock);
1744         do {
1745                 val = (old >> 1) & 0x1;
1746                 new = (old & ~0x3) + 2 + val;
1747         } while (!try_cmpxchg(lock, &old, new));
1748
1749         if (val)
1750                 return 0;
1751
1752         return -1;
1753 }
1754
1755 int __acpi_release_global_lock(unsigned int *lock)
1756 {
1757         unsigned int old, new;
1758
1759         old = READ_ONCE(*lock);
1760         do {
1761                 new = old & ~0x3;
1762         } while (!try_cmpxchg(lock, &old, new));
1763         return old & 0x1;
1764 }
1765
1766 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1767 {
1768         e820__range_add(addr, size, E820_TYPE_NVS);
1769         e820__update_table_print();
1770 }
1771
1772 void x86_default_set_root_pointer(u64 addr)
1773 {
1774         boot_params.acpi_rsdp_addr = addr;
1775 }
1776
1777 u64 x86_default_get_root_pointer(void)
1778 {
1779         return boot_params.acpi_rsdp_addr;
1780 }
1781
1782 #ifdef CONFIG_XEN_PV
1783 void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
1784 {
1785         return ioremap_cache(phys, size);
1786 }
1787
1788 void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, acpi_size size) =
1789         x86_acpi_os_ioremap;
1790 EXPORT_SYMBOL_GPL(acpi_os_ioremap);
1791 #endif