arch/x86/kernel/quirks.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * This file contains work-arounds for x86 and x86_64 platform bugs.
   4  */
   5 #include <linux/dmi.h>
   6 #include <linux/pci.h>
   7 #include <linux/irq.h>
   8
   9 #include <asm/hpet.h>
  10 #include <asm/setup.h>
  11 #include <asm/mce.h>
  12
  13 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
  14
  15 static void quirk_intel_irqbalance(struct pci_dev *dev)
  16 {
  17         u8 config;
  18         u16 word;
  19
  20         /* BIOS may enable hardware IRQ balancing for
  21          * E7520/E7320/E7525(revision ID 0x9 and below)
  22          * based platforms.
  23          * Disable SW irqbalance/affinity on those platforms.
  24          */
  25         if (dev->revision > 0x9)
  26                 return;
  27
  28         /* enable access to config space*/
  29         pci_read_config_byte(dev, 0xf4, &config);
  30         pci_write_config_byte(dev, 0xf4, config|0x2);
  31
  32         /*
  33          * read xTPR register.  We may not have a pci_dev for device 8
  34          * because it might be hidden until the above write.
  35          */
  36         pci_bus_read_config_word(dev->bus, PCI_DEVFN(8, 0), 0x4c, &word);
  37
  38         if (!(word & (1 << 13))) {
  39                 dev_info(&dev->dev, "Intel E7520/7320/7525 detected; "
  40                         "disabling irq balancing and affinity\n");
  41                 noirqdebug_setup("");
  42 #ifdef CONFIG_PROC_FS
  43                 no_irq_affinity = 1;
  44 #endif
  45         }
  46
  47         /* put back the original value for config space*/
  48         if (!(config & 0x2))
  49                 pci_write_config_byte(dev, 0xf4, config);
  50 }
  51 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH,
  52                         quirk_intel_irqbalance);
  53 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH,
  54                         quirk_intel_irqbalance);
  55 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH,
  56                         quirk_intel_irqbalance);
  57 #endif
  58
  59 #if defined(CONFIG_HPET_TIMER)
  60 unsigned long force_hpet_address;
  61
  62 static enum {
  63         NONE_FORCE_HPET_RESUME,
  64         OLD_ICH_FORCE_HPET_RESUME,
  65         ICH_FORCE_HPET_RESUME,
  66         VT8237_FORCE_HPET_RESUME,
  67         NVIDIA_FORCE_HPET_RESUME,
  68         ATI_FORCE_HPET_RESUME,
  69 } force_hpet_resume_type;
  70
  71 static void __iomem *rcba_base;
  72
  73 static void ich_force_hpet_resume(void)
  74 {
  75         u32 val;
  76
  77         if (!force_hpet_address)
  78                 return;
  79
  80         BUG_ON(rcba_base == NULL);
  81
  82         /* read the Function Disable register, dword mode only */
  83         val = readl(rcba_base + 0x3404);
  84         if (!(val & 0x80)) {
  85                 /* HPET disabled in HPTC. Trying to enable */
  86                 writel(val | 0x80, rcba_base + 0x3404);
  87         }
  88
  89         val = readl(rcba_base + 0x3404);
  90         if (!(val & 0x80))
  91                 BUG();
  92         else
  93                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
  94 }
  95
  96 static void ich_force_enable_hpet(struct pci_dev *dev)
  97 {
  98         u32 val;
  99         u32 rcba;
 100         int err = 0;
 101
 102         if (hpet_address || force_hpet_address)
 103                 return;
 104
 105         pci_read_config_dword(dev, 0xF0, &rcba);
 106         rcba &= 0xFFFFC000;
 107         if (rcba == 0) {
 108                 dev_printk(KERN_DEBUG, &dev->dev, "RCBA disabled; "
 109                         "cannot force enable HPET\n");
 110                 return;
 111         }
 112
 113         /* use bits 31:14, 16 kB aligned */
 114         rcba_base = ioremap(rcba, 0x4000);
 115         if (rcba_base == NULL) {
 116                 dev_printk(KERN_DEBUG, &dev->dev, "ioremap failed; "
 117                         "cannot force enable HPET\n");
 118                 return;
 119         }
 120
 121         /* read the Function Disable register, dword mode only */
 122         val = readl(rcba_base + 0x3404);
 123
 124         if (val & 0x80) {
 125                 /* HPET is enabled in HPTC. Just not reported by BIOS */
 126                 val = val & 0x3;
 127                 force_hpet_address = 0xFED00000 | (val << 12);
 128                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 129                         "0x%lx\n", force_hpet_address);
 130                 iounmap(rcba_base);
 131                 return;
 132         }
 133
 134         /* HPET disabled in HPTC. Trying to enable */
 135         writel(val | 0x80, rcba_base + 0x3404);
 136
 137         val = readl(rcba_base + 0x3404);
 138         if (!(val & 0x80)) {
 139                 err = 1;
 140         } else {
 141                 val = val & 0x3;
 142                 force_hpet_address = 0xFED00000 | (val << 12);
 143         }
 144
 145         if (err) {
 146                 force_hpet_address = 0;
 147                 iounmap(rcba_base);
 148                 dev_printk(KERN_DEBUG, &dev->dev,
 149                         "Failed to force enable HPET\n");
 150         } else {
 151                 force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
 152                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 153                         "0x%lx\n", force_hpet_address);
 154         }
 155 }
 156
 157 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
 158                          ich_force_enable_hpet);
 159 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0,
 160                          ich_force_enable_hpet);
 161 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
 162                          ich_force_enable_hpet);
 163 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
 164                          ich_force_enable_hpet);
 165 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1,
 166                          ich_force_enable_hpet);
 167 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
 168                          ich_force_enable_hpet);
 169 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
 170                          ich_force_enable_hpet);
 171 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_4,
 172                          ich_force_enable_hpet);
 173 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7,
 174                          ich_force_enable_hpet);
 175 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x3a16,   /* ICH10 */
 176                          ich_force_enable_hpet);
 177
 178 static struct pci_dev *cached_dev;
 179
 180 static void hpet_print_force_info(void)
 181 {
 182         printk(KERN_INFO "HPET not enabled in BIOS. "
 183                "You might try hpet=force boot option\n");
 184 }
 185
 186 static void old_ich_force_hpet_resume(void)
 187 {
 188         u32 val;
 189         u32 gen_cntl;
 190
 191         if (!force_hpet_address || !cached_dev)
 192                 return;
 193
 194         pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
 195         gen_cntl &= (~(0x7 << 15));
 196         gen_cntl |= (0x4 << 15);
 197
 198         pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
 199         pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
 200         val = gen_cntl >> 15;
 201         val &= 0x7;
 202         if (val == 0x4)
 203                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
 204         else
 205                 BUG();
 206 }
 207
 208 static void old_ich_force_enable_hpet(struct pci_dev *dev)
 209 {
 210         u32 val;
 211         u32 gen_cntl;
 212
 213         if (hpet_address || force_hpet_address)
 214                 return;
 215
 216         pci_read_config_dword(dev, 0xD0, &gen_cntl);
 217         /*
 218          * Bit 17 is HPET enable bit.
 219          * Bit 16:15 control the HPET base address.
 220          */
 221         val = gen_cntl >> 15;
 222         val &= 0x7;
 223         if (val & 0x4) {
 224                 val &= 0x3;
 225                 force_hpet_address = 0xFED00000 | (val << 12);
 226                 dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
 227                         force_hpet_address);
 228                 return;
 229         }
 230
 231         /*
 232          * HPET is disabled. Trying enabling at FED00000 and check
 233          * whether it sticks
 234          */
 235         gen_cntl &= (~(0x7 << 15));
 236         gen_cntl |= (0x4 << 15);
 237         pci_write_config_dword(dev, 0xD0, gen_cntl);
 238
 239         pci_read_config_dword(dev, 0xD0, &gen_cntl);
 240
 241         val = gen_cntl >> 15;
 242         val &= 0x7;
 243         if (val & 0x4) {
 244                 /* HPET is enabled in HPTC. Just not reported by BIOS */
 245                 val &= 0x3;
 246                 force_hpet_address = 0xFED00000 | (val << 12);
 247                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 248                         "0x%lx\n", force_hpet_address);
 249                 cached_dev = dev;
 250                 force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
 251                 return;
 252         }
 253
 254         dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
 255 }
 256
 257 /*
 258  * Undocumented chipset features. Make sure that the user enforced
 259  * this.
 260  */
 261 static void old_ich_force_enable_hpet_user(struct pci_dev *dev)
 262 {
 263         if (hpet_force_user)
 264                 old_ich_force_enable_hpet(dev);
 265 }
 266
 267 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1,
 268                          old_ich_force_enable_hpet_user);
 269 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
 270                          old_ich_force_enable_hpet_user);
 271 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
 272                          old_ich_force_enable_hpet_user);
 273 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
 274                          old_ich_force_enable_hpet_user);
 275 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12,
 276                          old_ich_force_enable_hpet_user);
 277 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
 278                          old_ich_force_enable_hpet);
 279 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
 280                          old_ich_force_enable_hpet);
 281
 282
 283 static void vt8237_force_hpet_resume(void)
 284 {
 285         u32 val;
 286
 287         if (!force_hpet_address || !cached_dev)
 288                 return;
 289
 290         val = 0xfed00000 | 0x80;
 291         pci_write_config_dword(cached_dev, 0x68, val);
 292
 293         pci_read_config_dword(cached_dev, 0x68, &val);
 294         if (val & 0x80)
 295                 printk(KERN_DEBUG "Force enabled HPET at resume\n");
 296         else
 297                 BUG();
 298 }
 299
 300 static void vt8237_force_enable_hpet(struct pci_dev *dev)
 301 {
 302         u32 val;
 303
 304         if (hpet_address || force_hpet_address)
 305                 return;
 306
 307         if (!hpet_force_user) {
 308                 hpet_print_force_info();
 309                 return;
 310         }
 311
 312         pci_read_config_dword(dev, 0x68, &val);
 313         /*
 314          * Bit 7 is HPET enable bit.
 315          * Bit 31:10 is HPET base address (contrary to what datasheet claims)
 316          */
 317         if (val & 0x80) {
 318                 force_hpet_address = (val & ~0x3ff);
 319                 dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
 320                         force_hpet_address);
 321                 return;
 322         }
 323
 324         /*
 325          * HPET is disabled. Trying enabling at FED00000 and check
 326          * whether it sticks
 327          */
 328         val = 0xfed00000 | 0x80;
 329         pci_write_config_dword(dev, 0x68, val);
 330
 331         pci_read_config_dword(dev, 0x68, &val);
 332         if (val & 0x80) {
 333                 force_hpet_address = (val & ~0x3ff);
 334                 dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 335                         "0x%lx\n", force_hpet_address);
 336                 cached_dev = dev;
 337                 force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
 338                 return;
 339         }
 340
 341         dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
 342 }
 343
 344 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
 345                          vt8237_force_enable_hpet);
 346 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
 347                          vt8237_force_enable_hpet);
 348 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_CX700,
 349                          vt8237_force_enable_hpet);
 350
 351 static void ati_force_hpet_resume(void)
 352 {
 353         pci_write_config_dword(cached_dev, 0x14, 0xfed00000);
 354         printk(KERN_DEBUG "Force enabled HPET at resume\n");
 355 }
 356
 357 static u32 ati_ixp4x0_rev(struct pci_dev *dev)
 358 {
 359         int err = 0;
 360         u32 d = 0;
 361         u8  b = 0;
 362
 363         err = pci_read_config_byte(dev, 0xac, &b);
 364         b &= ~(1<<5);
 365         err |= pci_write_config_byte(dev, 0xac, b);
 366         err |= pci_read_config_dword(dev, 0x70, &d);
 367         d |= 1<<8;
 368         err |= pci_write_config_dword(dev, 0x70, d);
 369         err |= pci_read_config_dword(dev, 0x8, &d);
 370         d &= 0xff;
 371         dev_printk(KERN_DEBUG, &dev->dev, "SB4X0 revision 0x%x\n", d);
 372
 373         WARN_ON_ONCE(err);
 374
 375         return d;
 376 }
 377
 378 static void ati_force_enable_hpet(struct pci_dev *dev)
 379 {
 380         u32 d, val;
 381         u8  b;
 382
 383         if (hpet_address || force_hpet_address)
 384                 return;
 385
 386         if (!hpet_force_user) {
 387                 hpet_print_force_info();
 388                 return;
 389         }
 390
 391         d = ati_ixp4x0_rev(dev);
 392         if (d  < 0x82)
 393                 return;
 394
 395         /* base address */
 396         pci_write_config_dword(dev, 0x14, 0xfed00000);
 397         pci_read_config_dword(dev, 0x14, &val);
 398
 399         /* enable interrupt */
 400         outb(0x72, 0xcd6); b = inb(0xcd7);
 401         b |= 0x1;
 402         outb(0x72, 0xcd6); outb(b, 0xcd7);
 403         outb(0x72, 0xcd6); b = inb(0xcd7);
 404         if (!(b & 0x1))
 405                 return;
 406         pci_read_config_dword(dev, 0x64, &d);
 407         d |= (1<<10);
 408         pci_write_config_dword(dev, 0x64, d);
 409         pci_read_config_dword(dev, 0x64, &d);
 410         if (!(d & (1<<10)))
 411                 return;
 412
 413         force_hpet_address = val;
 414         force_hpet_resume_type = ATI_FORCE_HPET_RESUME;
 415         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 416                    force_hpet_address);
 417         cached_dev = dev;
 418 }
 419 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
 420                          ati_force_enable_hpet);
 421
 422 /*
 423  * Undocumented chipset feature taken from LinuxBIOS.
 424  */
 425 static void nvidia_force_hpet_resume(void)
 426 {
 427         pci_write_config_dword(cached_dev, 0x44, 0xfed00001);
 428         printk(KERN_DEBUG "Force enabled HPET at resume\n");
 429 }
 430
 431 static void nvidia_force_enable_hpet(struct pci_dev *dev)
 432 {
 433         u32 val;
 434
 435         if (hpet_address || force_hpet_address)
 436                 return;
 437
 438         if (!hpet_force_user) {
 439                 hpet_print_force_info();
 440                 return;
 441         }
 442
 443         pci_write_config_dword(dev, 0x44, 0xfed00001);
 444         pci_read_config_dword(dev, 0x44, &val);
 445         force_hpet_address = val & 0xfffffffe;
 446         force_hpet_resume_type = NVIDIA_FORCE_HPET_RESUME;
 447         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 448                 force_hpet_address);
 449         cached_dev = dev;
 450 }
 451
 452 /* ISA Bridges */
 453 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0050,
 454                         nvidia_force_enable_hpet);
 455 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0051,
 456                         nvidia_force_enable_hpet);
 457
 458 /* LPC bridges */
 459 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0260,
 460                         nvidia_force_enable_hpet);
 461 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0360,
 462                         nvidia_force_enable_hpet);
 463 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0361,
 464                         nvidia_force_enable_hpet);
 465 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0362,
 466                         nvidia_force_enable_hpet);
 467 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0363,
 468                         nvidia_force_enable_hpet);
 469 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0364,
 470                         nvidia_force_enable_hpet);
 471 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0365,
 472                         nvidia_force_enable_hpet);
 473 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0366,
 474                         nvidia_force_enable_hpet);
 475 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0367,
 476                         nvidia_force_enable_hpet);
 477
 478 void force_hpet_resume(void)
 479 {
 480         switch (force_hpet_resume_type) {
 481         case ICH_FORCE_HPET_RESUME:
 482                 ich_force_hpet_resume();
 483                 return;
 484         case OLD_ICH_FORCE_HPET_RESUME:
 485                 old_ich_force_hpet_resume();
 486                 return;
 487         case VT8237_FORCE_HPET_RESUME:
 488                 vt8237_force_hpet_resume();
 489                 return;
 490         case NVIDIA_FORCE_HPET_RESUME:
 491                 nvidia_force_hpet_resume();
 492                 return;
 493         case ATI_FORCE_HPET_RESUME:
 494                 ati_force_hpet_resume();
 495                 return;
 496         default:
 497                 break;
 498         }
 499 }
 500
 501 /*
 502  * According to the datasheet e6xx systems have the HPET hardwired to
 503  * 0xfed00000
 504  */
 505 static void e6xx_force_enable_hpet(struct pci_dev *dev)
 506 {
 507         if (hpet_address || force_hpet_address)
 508                 return;
 509
 510         force_hpet_address = 0xFED00000;
 511         force_hpet_resume_type = NONE_FORCE_HPET_RESUME;
 512         dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
 513                 "0x%lx\n", force_hpet_address);
 514 }
 515 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E6XX_CU,
 516                          e6xx_force_enable_hpet);
 517
 518 /*
 519  * HPET MSI on some boards (ATI SB700/SB800) has side effect on
 520  * floppy DMA. Disable HPET MSI on such platforms.
 521  * See erratum #27 (Misinterpreted MSI Requests May Result in
 522  * Corrupted LPC DMA Data) in AMD Publication #46837,
 523  * "SB700 Family Product Errata", Rev. 1.0, March 2010.
 524  */
 525 static void force_disable_hpet_msi(struct pci_dev *unused)
 526 {
 527         hpet_msi_disable = true;
 528 }
 529
 530 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
 531                          force_disable_hpet_msi);
 532
 533 #endif
 534
 535 #if defined(CONFIG_PCI) && defined(CONFIG_NUMA)
 536 /* Set correct numa_node information for AMD NB functions */
 537 static void quirk_amd_nb_node(struct pci_dev *dev)
 538 {
 539         struct pci_dev *nb_ht;
 540         unsigned int devfn;
 541         u32 node;
 542         u32 val;
 543
 544         devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 0);
 545         nb_ht = pci_get_slot(dev->bus, devfn);
 546         if (!nb_ht)
 547                 return;
 548
 549         pci_read_config_dword(nb_ht, 0x60, &val);
 550         node = pcibus_to_node(dev->bus) | (val & 7);
 551         /*
 552          * Some hardware may return an invalid node ID,
 553          * so check it first:
 554          */
 555         if (node_online(node))
 556                 set_dev_node(&dev->dev, node);
 557         pci_dev_put(nb_ht);
 558 }
 559
 560 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
 561                         quirk_amd_nb_node);
 562 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
 563                         quirk_amd_nb_node);
 564 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
 565                         quirk_amd_nb_node);
 566 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC,
 567                         quirk_amd_nb_node);
 568 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_HT,
 569                         quirk_amd_nb_node);
 570 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MAP,
 571                         quirk_amd_nb_node);
 572 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_DRAM,
 573                         quirk_amd_nb_node);
 574 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC,
 575                         quirk_amd_nb_node);
 576 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_LINK,
 577                         quirk_amd_nb_node);
 578 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F0,
 579                         quirk_amd_nb_node);
 580 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F1,
 581                         quirk_amd_nb_node);
 582 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F2,
 583                         quirk_amd_nb_node);
 584 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F3,
 585                         quirk_amd_nb_node);
 586 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F4,
 587                         quirk_amd_nb_node);
 588 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F5,
 589                         quirk_amd_nb_node);
 590
 591 #endif
 592
 593 #ifdef CONFIG_PCI
 594 /*
 595  * Processor does not ensure DRAM scrub read/write sequence
 596  * is atomic wrt accesses to CC6 save state area. Therefore
 597  * if a concurrent scrub read/write access is to same address
 598  * the entry may appear as if it is not written. This quirk
 599  * applies to Fam16h models 00h-0Fh
 600  *
 601  * See "Revision Guide" for AMD F16h models 00h-0fh,
 602  * document 51810 rev. 3.04, Nov 2013
 603  */
 604 static void amd_disable_seq_and_redirect_scrub(struct pci_dev *dev)
 605 {
 606         u32 val;
 607
 608         /*
 609          * Suggested workaround:
 610          * set D18F3x58[4:0] = 00h and set D18F3x5C[0] = 0b
 611          */
 612         pci_read_config_dword(dev, 0x58, &val);
 613         if (val & 0x1F) {
 614                 val &= ~(0x1F);
 615                 pci_write_config_dword(dev, 0x58, val);
 616         }
 617
 618         pci_read_config_dword(dev, 0x5C, &val);
 619         if (val & BIT(0)) {
 620                 val &= ~BIT(0);
 621                 pci_write_config_dword(dev, 0x5c, val);
 622         }
 623 }
 624
 625 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_NB_F3,
 626                         amd_disable_seq_and_redirect_scrub);
 627
 628 /* Ivy Bridge, Haswell, Broadwell */
 629 static void quirk_intel_brickland_xeon_ras_cap(struct pci_dev *pdev)
 630 {
 631         u32 capid0;
 632
 633         pci_read_config_dword(pdev, 0x84, &capid0);
 634
 635         if (capid0 & 0x10)
 636                 enable_copy_mc_fragile();
 637 }
 638
 639 /* Skylake */
 640 static void quirk_intel_purley_xeon_ras_cap(struct pci_dev *pdev)
 641 {
 642         u32 capid0, capid5;
 643
 644         pci_read_config_dword(pdev, 0x84, &capid0);
 645         pci_read_config_dword(pdev, 0x98, &capid5);
 646
 647         /*
 648          * CAPID0{7:6} indicate whether this is an advanced RAS SKU
 649          * CAPID5{8:5} indicate that various NVDIMM usage modes are
 650          * enabled, so memory machine check recovery is also enabled.
 651          */
 652         if ((capid0 & 0xc0) == 0xc0 || (capid5 & 0x1e0))
 653                 enable_copy_mc_fragile();
 654
 655 }
 656 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0ec3, quirk_intel_brickland_xeon_ras_cap);
 657 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2fc0, quirk_intel_brickland_xeon_ras_cap);
 658 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, quirk_intel_brickland_xeon_ras_cap);
 659 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2083, quirk_intel_purley_xeon_ras_cap);
 660 #endif
 661
 662 bool x86_apple_machine;
 663 EXPORT_SYMBOL(x86_apple_machine);
 664
 665 void __init early_platform_quirks(void)
 666 {
 667         x86_apple_machine = dmi_match(DMI_SYS_VENDOR, "Apple Inc.") ||
 668                             dmi_match(DMI_SYS_VENDOR, "Apple Computer, Inc.");
 669 }