arch/x86/kernel/apic/x2apic_uv_x.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * SGI UV APIC functions (note: not an Intel compatible APIC)
   7  *
   8  * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
   9  * Copyright (C) 2007-2014 Silicon Graphics, Inc. All rights reserved.
  10  */
  11 #include <linux/crash_dump.h>
  12 #include <linux/cpuhotplug.h>
  13 #include <linux/cpumask.h>
  14 #include <linux/proc_fs.h>
  15 #include <linux/memory.h>
  16 #include <linux/export.h>
  17 #include <linux/pci.h>
  18 #include <linux/acpi.h>
  19 #include <linux/efi.h>
  20
  21 #include <asm/e820/api.h>
  22 #include <asm/uv/uv_mmrs.h>
  23 #include <asm/uv/uv_hub.h>
  24 #include <asm/uv/bios.h>
  25 #include <asm/uv/uv.h>
  26 #include <asm/apic.h>
  27
  28 static enum uv_system_type      uv_system_type;
  29 static int                      uv_hubbed_system;
  30 static int                      uv_hubless_system;
  31 static u64                      gru_start_paddr, gru_end_paddr;
  32 static union uvh_apicid         uvh_apicid;
  33 static int                      uv_node_id;
  34
  35 /* Unpack AT/OEM/TABLE ID's to be NULL terminated strings */
  36 static u8 uv_archtype[UV_AT_SIZE + 1];
  37 static u8 oem_id[ACPI_OEM_ID_SIZE + 1];
  38 static u8 oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1];
  39
  40 /* Information derived from CPUID and some UV MMRs */
  41 static struct {
  42         unsigned int apicid_shift;
  43         unsigned int apicid_mask;
  44         unsigned int socketid_shift;    /* aka pnode_shift for UV2/3 */
  45         unsigned int pnode_mask;
  46         unsigned int nasid_shift;
  47         unsigned int gpa_shift;
  48         unsigned int gnode_shift;
  49         unsigned int m_skt;
  50         unsigned int n_skt;
  51 } uv_cpuid;
  52
  53 static int uv_min_hub_revision_id;
  54
  55 static struct apic apic_x2apic_uv_x;
  56 static struct uv_hub_info_s uv_hub_info_node0;
  57
  58 /* Set this to use hardware error handler instead of kernel panic: */
  59 static int disable_uv_undefined_panic = 1;
  60
  61 unsigned long uv_undefined(char *str)
  62 {
  63         if (likely(!disable_uv_undefined_panic))
  64                 panic("UV: error: undefined MMR: %s\n", str);
  65         else
  66                 pr_crit("UV: error: undefined MMR: %s\n", str);
  67
  68         /* Cause a machine fault: */
  69         return ~0ul;
  70 }
  71 EXPORT_SYMBOL(uv_undefined);
  72
  73 static unsigned long __init uv_early_read_mmr(unsigned long addr)
  74 {
  75         unsigned long val, *mmr;
  76
  77         mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr));
  78         val = *mmr;
  79         early_iounmap(mmr, sizeof(*mmr));
  80
  81         return val;
  82 }
  83
  84 static inline bool is_GRU_range(u64 start, u64 end)
  85 {
  86         if (!gru_start_paddr)
  87                 return false;
  88
  89         return start >= gru_start_paddr && end <= gru_end_paddr;
  90 }
  91
  92 static bool uv_is_untracked_pat_range(u64 start, u64 end)
  93 {
  94         return is_ISA_range(start, end) || is_GRU_range(start, end);
  95 }
  96
  97 static void __init early_get_pnodeid(void)
  98 {
  99         int pnode;
 100
 101         uv_cpuid.m_skt = 0;
 102         if (UVH_RH10_GAM_ADDR_MAP_CONFIG) {
 103                 union uvh_rh10_gam_addr_map_config_u  m_n_config;
 104
 105                 m_n_config.v = uv_early_read_mmr(UVH_RH10_GAM_ADDR_MAP_CONFIG);
 106                 uv_cpuid.n_skt = m_n_config.s.n_skt;
 107                 uv_cpuid.nasid_shift = 0;
 108         } else if (UVH_RH_GAM_ADDR_MAP_CONFIG) {
 109                 union uvh_rh_gam_addr_map_config_u  m_n_config;
 110
 111         m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_ADDR_MAP_CONFIG);
 112                 uv_cpuid.n_skt = m_n_config.s.n_skt;
 113                 if (is_uv(UV3))
 114                         uv_cpuid.m_skt = m_n_config.s3.m_skt;
 115                 if (is_uv(UV2))
 116                         uv_cpuid.m_skt = m_n_config.s2.m_skt;
 117                 uv_cpuid.nasid_shift = 1;
 118         } else {
 119                 unsigned long GAM_ADDR_MAP_CONFIG = 0;
 120
 121                 WARN(GAM_ADDR_MAP_CONFIG == 0,
 122                         "UV: WARN: GAM_ADDR_MAP_CONFIG is not available\n");
 123                 uv_cpuid.n_skt = 0;
 124                 uv_cpuid.nasid_shift = 0;
 125         }
 126
 127         if (is_uv(UV4|UVY))
 128                 uv_cpuid.gnode_shift = 2; /* min partition is 4 sockets */
 129
 130         uv_cpuid.pnode_mask = (1 << uv_cpuid.n_skt) - 1;
 131         pnode = (uv_node_id >> uv_cpuid.nasid_shift) & uv_cpuid.pnode_mask;
 132         uv_cpuid.gpa_shift = 46;        /* Default unless changed */
 133
 134         pr_info("UV: n_skt:%d pnmsk:%x pn:%x\n",
 135                 uv_cpuid.n_skt, uv_cpuid.pnode_mask, pnode);
 136 }
 137
 138 /* Running on a UV Hubbed system, determine which UV Hub Type it is */
 139 static int __init early_set_hub_type(void)
 140 {
 141         union uvh_node_id_u node_id;
 142
 143         /*
 144          * The NODE_ID MMR is always at offset 0.
 145          * Contains the chip part # + revision.
 146          * Node_id field started with 15 bits,
 147          * ... now 7 but upper 8 are masked to 0.
 148          * All blades/nodes have the same part # and hub revision.
 149          */
 150         node_id.v = uv_early_read_mmr(UVH_NODE_ID);
 151         uv_node_id = node_id.sx.node_id;
 152
 153         switch (node_id.s.part_number) {
 154
 155         case UV5_HUB_PART_NUMBER:
 156                 uv_min_hub_revision_id = node_id.s.revision
 157                                          + UV5_HUB_REVISION_BASE;
 158                 uv_hub_type_set(UV5);
 159                 break;
 160
 161         /* UV4/4A only have a revision difference */
 162         case UV4_HUB_PART_NUMBER:
 163                 uv_min_hub_revision_id = node_id.s.revision
 164                                          + UV4_HUB_REVISION_BASE - 1;
 165                 uv_hub_type_set(UV4);
 166                 if (uv_min_hub_revision_id == UV4A_HUB_REVISION_BASE)
 167                         uv_hub_type_set(UV4|UV4A);
 168                 break;
 169
 170         case UV3_HUB_PART_NUMBER:
 171         case UV3_HUB_PART_NUMBER_X:
 172                 uv_min_hub_revision_id = node_id.s.revision
 173                                          + UV3_HUB_REVISION_BASE;
 174                 uv_hub_type_set(UV3);
 175                 break;
 176
 177         case UV2_HUB_PART_NUMBER:
 178         case UV2_HUB_PART_NUMBER_X:
 179                 uv_min_hub_revision_id = node_id.s.revision
 180                                          + UV2_HUB_REVISION_BASE - 1;
 181                 uv_hub_type_set(UV2);
 182                 break;
 183
 184         default:
 185                 return 0;
 186         }
 187
 188         pr_info("UV: part#:%x rev:%d rev_id:%d UVtype:0x%x\n",
 189                 node_id.s.part_number, node_id.s.revision,
 190                 uv_min_hub_revision_id, is_uv(~0));
 191
 192         return 1;
 193 }
 194
 195 static void __init uv_tsc_check_sync(void)
 196 {
 197         u64 mmr;
 198         int sync_state;
 199         int mmr_shift;
 200         char *state;
 201
 202         /* Different returns from different UV BIOS versions */
 203         mmr = uv_early_read_mmr(UVH_TSC_SYNC_MMR);
 204         mmr_shift =
 205                 is_uv2_hub() ? UVH_TSC_SYNC_SHIFT_UV2K : UVH_TSC_SYNC_SHIFT;
 206         sync_state = (mmr >> mmr_shift) & UVH_TSC_SYNC_MASK;
 207
 208         /* Check if TSC is valid for all sockets */
 209         switch (sync_state) {
 210         case UVH_TSC_SYNC_VALID:
 211                 state = "in sync";
 212                 mark_tsc_async_resets("UV BIOS");
 213                 break;
 214
 215         /* If BIOS state unknown, don't do anything */
 216         case UVH_TSC_SYNC_UNKNOWN:
 217                 state = "unknown";
 218                 break;
 219
 220         /* Otherwise, BIOS indicates problem with TSC */
 221         default:
 222                 state = "unstable";
 223                 mark_tsc_unstable("UV BIOS");
 224                 break;
 225         }
 226         pr_info("UV: TSC sync state from BIOS:0%d(%s)\n", sync_state, state);
 227 }
 228
 229 /* Selector for (4|4A|5) structs */
 230 #define uvxy_field(sname, field, undef) (       \
 231         is_uv(UV4A) ? sname.s4a.field :         \
 232         is_uv(UV4) ? sname.s4.field :           \
 233         is_uv(UV3) ? sname.s3.field :           \
 234         undef)
 235
 236 /* [Copied from arch/x86/kernel/cpu/topology.c:detect_extended_topology()] */
 237
 238 #define SMT_LEVEL                       0       /* Leaf 0xb SMT level */
 239 #define INVALID_TYPE                    0       /* Leaf 0xb sub-leaf types */
 240 #define SMT_TYPE                        1
 241 #define CORE_TYPE                       2
 242 #define LEAFB_SUBTYPE(ecx)              (((ecx) >> 8) & 0xff)
 243 #define BITS_SHIFT_NEXT_LEVEL(eax)      ((eax) & 0x1f)
 244
 245 static void set_x2apic_bits(void)
 246 {
 247         unsigned int eax, ebx, ecx, edx, sub_index;
 248         unsigned int sid_shift;
 249
 250         cpuid(0, &eax, &ebx, &ecx, &edx);
 251         if (eax < 0xb) {
 252                 pr_info("UV: CPU does not have CPUID.11\n");
 253                 return;
 254         }
 255
 256         cpuid_count(0xb, SMT_LEVEL, &eax, &ebx, &ecx, &edx);
 257         if (ebx == 0 || (LEAFB_SUBTYPE(ecx) != SMT_TYPE)) {
 258                 pr_info("UV: CPUID.11 not implemented\n");
 259                 return;
 260         }
 261
 262         sid_shift = BITS_SHIFT_NEXT_LEVEL(eax);
 263         sub_index = 1;
 264         do {
 265                 cpuid_count(0xb, sub_index, &eax, &ebx, &ecx, &edx);
 266                 if (LEAFB_SUBTYPE(ecx) == CORE_TYPE) {
 267                         sid_shift = BITS_SHIFT_NEXT_LEVEL(eax);
 268                         break;
 269                 }
 270                 sub_index++;
 271         } while (LEAFB_SUBTYPE(ecx) != INVALID_TYPE);
 272
 273         uv_cpuid.apicid_shift   = 0;
 274         uv_cpuid.apicid_mask    = (~(-1 << sid_shift));
 275         uv_cpuid.socketid_shift = sid_shift;
 276 }
 277
 278 static void __init early_get_apic_socketid_shift(void)
 279 {
 280         if (is_uv2_hub() || is_uv3_hub())
 281                 uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
 282
 283         set_x2apic_bits();
 284
 285         pr_info("UV: apicid_shift:%d apicid_mask:0x%x\n", uv_cpuid.apicid_shift, uv_cpuid.apicid_mask);
 286         pr_info("UV: socketid_shift:%d pnode_mask:0x%x\n", uv_cpuid.socketid_shift, uv_cpuid.pnode_mask);
 287 }
 288
 289 static void __init uv_stringify(int len, char *to, char *from)
 290 {
 291         /* Relies on 'to' being NULL chars so result will be NULL terminated */
 292         strncpy(to, from, len-1);
 293
 294         /* Trim trailing spaces */
 295         (void)strim(to);
 296 }
 297
 298 /* Find UV arch type entry in UVsystab */
 299 static unsigned long __init early_find_archtype(struct uv_systab *st)
 300 {
 301         int i;
 302
 303         for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
 304                 unsigned long ptr = st->entry[i].offset;
 305
 306                 if (!ptr)
 307                         continue;
 308                 ptr += (unsigned long)st;
 309                 if (st->entry[i].type == UV_SYSTAB_TYPE_ARCH_TYPE)
 310                         return ptr;
 311         }
 312         return 0;
 313 }
 314
 315 /* Validate UV arch type field in UVsystab */
 316 static int __init decode_arch_type(unsigned long ptr)
 317 {
 318         struct uv_arch_type_entry *uv_ate = (struct uv_arch_type_entry *)ptr;
 319         int n = strlen(uv_ate->archtype);
 320
 321         if (n > 0 && n < sizeof(uv_ate->archtype)) {
 322                 pr_info("UV: UVarchtype received from BIOS\n");
 323                 uv_stringify(sizeof(uv_archtype), uv_archtype, uv_ate->archtype);
 324                 return 1;
 325         }
 326         return 0;
 327 }
 328
 329 /* Determine if UV arch type entry might exist in UVsystab */
 330 static int __init early_get_arch_type(void)
 331 {
 332         unsigned long uvst_physaddr, uvst_size, ptr;
 333         struct uv_systab *st;
 334         u32 rev;
 335         int ret;
 336
 337         uvst_physaddr = get_uv_systab_phys(0);
 338         if (!uvst_physaddr)
 339                 return 0;
 340
 341         st = early_memremap_ro(uvst_physaddr, sizeof(struct uv_systab));
 342         if (!st) {
 343                 pr_err("UV: Cannot access UVsystab, remap failed\n");
 344                 return 0;
 345         }
 346
 347         rev = st->revision;
 348         if (rev < UV_SYSTAB_VERSION_UV5) {
 349                 early_memunmap(st, sizeof(struct uv_systab));
 350                 return 0;
 351         }
 352
 353         uvst_size = st->size;
 354         early_memunmap(st, sizeof(struct uv_systab));
 355         st = early_memremap_ro(uvst_physaddr, uvst_size);
 356         if (!st) {
 357                 pr_err("UV: Cannot access UVarchtype, remap failed\n");
 358                 return 0;
 359         }
 360
 361         ptr = early_find_archtype(st);
 362         if (!ptr) {
 363                 early_memunmap(st, uvst_size);
 364                 return 0;
 365         }
 366
 367         ret = decode_arch_type(ptr);
 368         early_memunmap(st, uvst_size);
 369         return ret;
 370 }
 371
 372 static int __init uv_set_system_type(char *_oem_id, char *_oem_table_id)
 373 {
 374         /* Save OEM_ID passed from ACPI MADT */
 375         uv_stringify(sizeof(oem_id), oem_id, _oem_id);
 376
 377         /* Check if BIOS sent us a UVarchtype */
 378         if (!early_get_arch_type())
 379
 380                 /* If not use OEM ID for UVarchtype */
 381                 uv_stringify(sizeof(uv_archtype), uv_archtype, oem_id);
 382
 383         /* Check if not hubbed */
 384         if (strncmp(uv_archtype, "SGI", 3) != 0) {
 385
 386                 /* (Not hubbed), check if not hubless */
 387                 if (strncmp(uv_archtype, "NSGI", 4) != 0)
 388
 389                         /* (Not hubless), not a UV */
 390                         return 0;
 391
 392                 /* Is UV hubless system */
 393                 uv_hubless_system = 0x01;
 394
 395                 /* UV5 Hubless */
 396                 if (strncmp(uv_archtype, "NSGI5", 5) == 0)
 397                         uv_hubless_system |= 0x20;
 398
 399                 /* UV4 Hubless: CH */
 400                 else if (strncmp(uv_archtype, "NSGI4", 5) == 0)
 401                         uv_hubless_system |= 0x10;
 402
 403                 /* UV3 Hubless: UV300/MC990X w/o hub */
 404                 else
 405                         uv_hubless_system |= 0x8;
 406
 407                 /* Copy APIC type */
 408                 uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id);
 409
 410                 pr_info("UV: OEM IDs %s/%s, SystemType %d, HUBLESS ID %x\n",
 411                         oem_id, oem_table_id, uv_system_type, uv_hubless_system);
 412                 return 0;
 413         }
 414
 415         if (numa_off) {
 416                 pr_err("UV: NUMA is off, disabling UV support\n");
 417                 return 0;
 418         }
 419
 420         /* Set hubbed type if true */
 421         uv_hub_info->hub_revision =
 422                 !strncmp(uv_archtype, "SGI5", 4) ? UV5_HUB_REVISION_BASE :
 423                 !strncmp(uv_archtype, "SGI4", 4) ? UV4_HUB_REVISION_BASE :
 424                 !strncmp(uv_archtype, "SGI3", 4) ? UV3_HUB_REVISION_BASE :
 425                 !strcmp(uv_archtype, "SGI2") ? UV2_HUB_REVISION_BASE : 0;
 426
 427         switch (uv_hub_info->hub_revision) {
 428         case UV5_HUB_REVISION_BASE:
 429                 uv_hubbed_system = 0x21;
 430                 uv_hub_type_set(UV5);
 431                 break;
 432
 433         case UV4_HUB_REVISION_BASE:
 434                 uv_hubbed_system = 0x11;
 435                 uv_hub_type_set(UV4);
 436                 break;
 437
 438         case UV3_HUB_REVISION_BASE:
 439                 uv_hubbed_system = 0x9;
 440                 uv_hub_type_set(UV3);
 441                 break;
 442
 443         case UV2_HUB_REVISION_BASE:
 444                 uv_hubbed_system = 0x5;
 445                 uv_hub_type_set(UV2);
 446                 break;
 447
 448         default:
 449                 return 0;
 450         }
 451
 452         /* Get UV hub chip part number & revision */
 453         early_set_hub_type();
 454
 455         /* Other UV setup functions */
 456         early_get_pnodeid();
 457         early_get_apic_socketid_shift();
 458         x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
 459         x86_platform.nmi_init = uv_nmi_init;
 460         uv_tsc_check_sync();
 461
 462         return 1;
 463 }
 464
 465 /* Called early to probe for the correct APIC driver */
 466 static int __init uv_acpi_madt_oem_check(char *_oem_id, char *_oem_table_id)
 467 {
 468         /* Set up early hub info fields for Node 0 */
 469         uv_cpu_info->p_uv_hub_info = &uv_hub_info_node0;
 470
 471         /* If not UV, return. */
 472         if (uv_set_system_type(_oem_id, _oem_table_id) == 0)
 473                 return 0;
 474
 475         /* Save and Decode OEM Table ID */
 476         uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id);
 477
 478         /* This is the most common hardware variant, x2apic mode */
 479         if (!strcmp(oem_table_id, "UVX"))
 480                 uv_system_type = UV_X2APIC;
 481
 482         /* Only used for very small systems, usually 1 chassis, legacy mode  */
 483         else if (!strcmp(oem_table_id, "UVL"))
 484                 uv_system_type = UV_LEGACY_APIC;
 485
 486         else
 487                 goto badbios;
 488
 489         pr_info("UV: OEM IDs %s/%s, System/UVType %d/0x%x, HUB RevID %d\n",
 490                 oem_id, oem_table_id, uv_system_type, is_uv(UV_ANY),
 491                 uv_min_hub_revision_id);
 492
 493         return 0;
 494
 495 badbios:
 496         pr_err("UV: UVarchtype:%s not supported\n", uv_archtype);
 497         BUG();
 498 }
 499
 500 enum uv_system_type get_uv_system_type(void)
 501 {
 502         return uv_system_type;
 503 }
 504
 505 int uv_get_hubless_system(void)
 506 {
 507         return uv_hubless_system;
 508 }
 509 EXPORT_SYMBOL_GPL(uv_get_hubless_system);
 510
 511 ssize_t uv_get_archtype(char *buf, int len)
 512 {
 513         return scnprintf(buf, len, "%s/%s", uv_archtype, oem_table_id);
 514 }
 515 EXPORT_SYMBOL_GPL(uv_get_archtype);
 516
 517 int is_uv_system(void)
 518 {
 519         return uv_system_type != UV_NONE;
 520 }
 521 EXPORT_SYMBOL_GPL(is_uv_system);
 522
 523 int is_uv_hubbed(int uvtype)
 524 {
 525         return (uv_hubbed_system & uvtype);
 526 }
 527 EXPORT_SYMBOL_GPL(is_uv_hubbed);
 528
 529 static int is_uv_hubless(int uvtype)
 530 {
 531         return (uv_hubless_system & uvtype);
 532 }
 533
 534 void **__uv_hub_info_list;
 535 EXPORT_SYMBOL_GPL(__uv_hub_info_list);
 536
 537 DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
 538 EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info);
 539
 540 short uv_possible_blades;
 541 EXPORT_SYMBOL_GPL(uv_possible_blades);
 542
 543 unsigned long sn_rtc_cycles_per_second;
 544 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
 545
 546 /* The following values are used for the per node hub info struct */
 547 static __initdata unsigned short                *_node_to_pnode;
 548 static __initdata unsigned short                _min_socket, _max_socket;
 549 static __initdata unsigned short                _min_pnode, _max_pnode, _gr_table_len;
 550 static __initdata struct uv_gam_range_entry     *uv_gre_table;
 551 static __initdata struct uv_gam_parameters      *uv_gp_table;
 552 static __initdata unsigned short                *_socket_to_node;
 553 static __initdata unsigned short                *_socket_to_pnode;
 554 static __initdata unsigned short                *_pnode_to_socket;
 555
 556 static __initdata struct uv_gam_range_s         *_gr_table;
 557
 558 #define SOCK_EMPTY      ((unsigned short)~0)
 559
 560 /* Default UV memory block size is 2GB */
 561 static unsigned long mem_block_size __initdata = (2UL << 30);
 562
 563 /* Kernel parameter to specify UV mem block size */
 564 static int __init parse_mem_block_size(char *ptr)
 565 {
 566         unsigned long size = memparse(ptr, NULL);
 567
 568         /* Size will be rounded down by set_block_size() below */
 569         mem_block_size = size;
 570         return 0;
 571 }
 572 early_param("uv_memblksize", parse_mem_block_size);
 573
 574 static __init int adj_blksize(u32 lgre)
 575 {
 576         unsigned long base = (unsigned long)lgre << UV_GAM_RANGE_SHFT;
 577         unsigned long size;
 578
 579         for (size = mem_block_size; size > MIN_MEMORY_BLOCK_SIZE; size >>= 1)
 580                 if (IS_ALIGNED(base, size))
 581                         break;
 582
 583         if (size >= mem_block_size)
 584                 return 0;
 585
 586         mem_block_size = size;
 587         return 1;
 588 }
 589
 590 static __init void set_block_size(void)
 591 {
 592         unsigned int order = ffs(mem_block_size);
 593
 594         if (order) {
 595                 /* adjust for ffs return of 1..64 */
 596                 set_memory_block_size_order(order - 1);
 597                 pr_info("UV: mem_block_size set to 0x%lx\n", mem_block_size);
 598         } else {
 599                 /* bad or zero value, default to 1UL << 31 (2GB) */
 600                 pr_err("UV: mem_block_size error with 0x%lx\n", mem_block_size);
 601                 set_memory_block_size_order(31);
 602         }
 603 }
 604
 605 /* Build GAM range lookup table: */
 606 static __init void build_uv_gr_table(void)
 607 {
 608         struct uv_gam_range_entry *gre = uv_gre_table;
 609         struct uv_gam_range_s *grt;
 610         unsigned long last_limit = 0, ram_limit = 0;
 611         int bytes, i, sid, lsid = -1, indx = 0, lindx = -1;
 612
 613         if (!gre)
 614                 return;
 615
 616         bytes = _gr_table_len * sizeof(struct uv_gam_range_s);
 617         grt = kzalloc(bytes, GFP_KERNEL);
 618         BUG_ON(!grt);
 619         _gr_table = grt;
 620
 621         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
 622                 if (gre->type == UV_GAM_RANGE_TYPE_HOLE) {
 623                         if (!ram_limit) {
 624                                 /* Mark hole between RAM/non-RAM: */
 625                                 ram_limit = last_limit;
 626                                 last_limit = gre->limit;
 627                                 lsid++;
 628                                 continue;
 629                         }
 630                         last_limit = gre->limit;
 631                         pr_info("UV: extra hole in GAM RE table @%d\n", (int)(gre - uv_gre_table));
 632                         continue;
 633                 }
 634                 if (_max_socket < gre->sockid) {
 635                         pr_err("UV: GAM table sockid(%d) too large(>%d) @%d\n", gre->sockid, _max_socket, (int)(gre - uv_gre_table));
 636                         continue;
 637                 }
 638                 sid = gre->sockid - _min_socket;
 639                 if (lsid < sid) {
 640                         /* New range: */
 641                         grt = &_gr_table[indx];
 642                         grt->base = lindx;
 643                         grt->nasid = gre->nasid;
 644                         grt->limit = last_limit = gre->limit;
 645                         lsid = sid;
 646                         lindx = indx++;
 647                         continue;
 648                 }
 649                 /* Update range: */
 650                 if (lsid == sid && !ram_limit) {
 651                         /* .. if contiguous: */
 652                         if (grt->limit == last_limit) {
 653                                 grt->limit = last_limit = gre->limit;
 654                                 continue;
 655                         }
 656                 }
 657                 /* Non-contiguous RAM range: */
 658                 if (!ram_limit) {
 659                         grt++;
 660                         grt->base = lindx;
 661                         grt->nasid = gre->nasid;
 662                         grt->limit = last_limit = gre->limit;
 663                         continue;
 664                 }
 665                 /* Non-contiguous/non-RAM: */
 666                 grt++;
 667                 /* base is this entry */
 668                 grt->base = grt - _gr_table;
 669                 grt->nasid = gre->nasid;
 670                 grt->limit = last_limit = gre->limit;
 671                 lsid++;
 672         }
 673
 674         /* Shorten table if possible */
 675         grt++;
 676         i = grt - _gr_table;
 677         if (i < _gr_table_len) {
 678                 void *ret;
 679
 680                 bytes = i * sizeof(struct uv_gam_range_s);
 681                 ret = krealloc(_gr_table, bytes, GFP_KERNEL);
 682                 if (ret) {
 683                         _gr_table = ret;
 684                         _gr_table_len = i;
 685                 }
 686         }
 687
 688         /* Display resultant GAM range table: */
 689         for (i = 0, grt = _gr_table; i < _gr_table_len; i++, grt++) {
 690                 unsigned long start, end;
 691                 int gb = grt->base;
 692
 693                 start = gb < 0 ?  0 : (unsigned long)_gr_table[gb].limit << UV_GAM_RANGE_SHFT;
 694                 end = (unsigned long)grt->limit << UV_GAM_RANGE_SHFT;
 695
 696                 pr_info("UV: GAM Range %2d %04x 0x%013lx-0x%013lx (%d)\n", i, grt->nasid, start, end, gb);
 697         }
 698 }
 699
 700 static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
 701 {
 702         unsigned long val;
 703         int pnode;
 704
 705         pnode = uv_apicid_to_pnode(phys_apicid);
 706
 707         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 708             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 709             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 710             APIC_DM_INIT;
 711
 712         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 713
 714         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 715             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 716             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 717             APIC_DM_STARTUP;
 718
 719         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 720
 721         return 0;
 722 }
 723
 724 static void uv_send_IPI_one(int cpu, int vector)
 725 {
 726         unsigned long apicid = per_cpu(x86_cpu_to_apicid, cpu);
 727         int pnode = uv_apicid_to_pnode(apicid);
 728         unsigned long dmode, val;
 729
 730         if (vector == NMI_VECTOR)
 731                 dmode = dest_NMI;
 732         else
 733                 dmode = dest_Fixed;
 734
 735         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 736                 (apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 737                 (dmode << UVH_IPI_INT_DELIVERY_MODE_SHFT) |
 738                 (vector << UVH_IPI_INT_VECTOR_SHFT);
 739
 740         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 741 }
 742
 743 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
 744 {
 745         unsigned int cpu;
 746
 747         for_each_cpu(cpu, mask)
 748                 uv_send_IPI_one(cpu, vector);
 749 }
 750
 751 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
 752 {
 753         unsigned int this_cpu = smp_processor_id();
 754         unsigned int cpu;
 755
 756         for_each_cpu(cpu, mask) {
 757                 if (cpu != this_cpu)
 758                         uv_send_IPI_one(cpu, vector);
 759         }
 760 }
 761
 762 static void uv_send_IPI_allbutself(int vector)
 763 {
 764         unsigned int this_cpu = smp_processor_id();
 765         unsigned int cpu;
 766
 767         for_each_online_cpu(cpu) {
 768                 if (cpu != this_cpu)
 769                         uv_send_IPI_one(cpu, vector);
 770         }
 771 }
 772
 773 static void uv_send_IPI_all(int vector)
 774 {
 775         uv_send_IPI_mask(cpu_online_mask, vector);
 776 }
 777
 778 static int uv_apic_id_valid(u32 apicid)
 779 {
 780         return 1;
 781 }
 782
 783 static int uv_apic_id_registered(void)
 784 {
 785         return 1;
 786 }
 787
 788 static void uv_init_apic_ldr(void)
 789 {
 790 }
 791
 792 static u32 apic_uv_calc_apicid(unsigned int cpu)
 793 {
 794         return apic_default_calc_apicid(cpu);
 795 }
 796
 797 static unsigned int x2apic_get_apic_id(unsigned long id)
 798 {
 799         return id;
 800 }
 801
 802 static u32 set_apic_id(unsigned int id)
 803 {
 804         return id;
 805 }
 806
 807 static unsigned int uv_read_apic_id(void)
 808 {
 809         return x2apic_get_apic_id(apic_read(APIC_ID));
 810 }
 811
 812 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
 813 {
 814         return uv_read_apic_id() >> index_msb;
 815 }
 816
 817 static void uv_send_IPI_self(int vector)
 818 {
 819         apic_write(APIC_SELF_IPI, vector);
 820 }
 821
 822 static int uv_probe(void)
 823 {
 824         return apic == &apic_x2apic_uv_x;
 825 }
 826
 827 static struct apic apic_x2apic_uv_x __ro_after_init = {
 828
 829         .name                           = "UV large system",
 830         .probe                          = uv_probe,
 831         .acpi_madt_oem_check            = uv_acpi_madt_oem_check,
 832         .apic_id_valid                  = uv_apic_id_valid,
 833         .apic_id_registered             = uv_apic_id_registered,
 834
 835         .irq_delivery_mode              = dest_Fixed,
 836         .irq_dest_mode                  = 0, /* Physical */
 837
 838         .disable_esr                    = 0,
 839         .dest_logical                   = APIC_DEST_LOGICAL,
 840         .check_apicid_used              = NULL,
 841
 842         .init_apic_ldr                  = uv_init_apic_ldr,
 843
 844         .ioapic_phys_id_map             = NULL,
 845         .setup_apic_routing             = NULL,
 846         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 847         .apicid_to_cpu_present          = NULL,
 848         .check_phys_apicid_present      = default_check_phys_apicid_present,
 849         .phys_pkg_id                    = uv_phys_pkg_id,
 850
 851         .get_apic_id                    = x2apic_get_apic_id,
 852         .set_apic_id                    = set_apic_id,
 853
 854         .calc_dest_apicid               = apic_uv_calc_apicid,
 855
 856         .send_IPI                       = uv_send_IPI_one,
 857         .send_IPI_mask                  = uv_send_IPI_mask,
 858         .send_IPI_mask_allbutself       = uv_send_IPI_mask_allbutself,
 859         .send_IPI_allbutself            = uv_send_IPI_allbutself,
 860         .send_IPI_all                   = uv_send_IPI_all,
 861         .send_IPI_self                  = uv_send_IPI_self,
 862
 863         .wakeup_secondary_cpu           = uv_wakeup_secondary,
 864         .inquire_remote_apic            = NULL,
 865
 866         .read                           = native_apic_msr_read,
 867         .write                          = native_apic_msr_write,
 868         .eoi_write                      = native_apic_msr_eoi_write,
 869         .icr_read                       = native_x2apic_icr_read,
 870         .icr_write                      = native_x2apic_icr_write,
 871         .wait_icr_idle                  = native_x2apic_wait_icr_idle,
 872         .safe_wait_icr_idle             = native_safe_x2apic_wait_icr_idle,
 873 };
 874
 875 #define UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH      3
 876 #define DEST_SHIFT UVXH_RH_GAM_ALIAS_0_REDIRECT_CONFIG_DEST_BASE_SHFT
 877
 878 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
 879 {
 880         union uvh_rh_gam_alias_2_overlay_config_u alias;
 881         union uvh_rh_gam_alias_2_redirect_config_u redirect;
 882         unsigned long m_redirect;
 883         unsigned long m_overlay;
 884         int i;
 885
 886         for (i = 0; i < UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH; i++) {
 887                 switch (i) {
 888                 case 0:
 889                         m_redirect = UVH_RH_GAM_ALIAS_0_REDIRECT_CONFIG;
 890                         m_overlay  = UVH_RH_GAM_ALIAS_0_OVERLAY_CONFIG;
 891                         break;
 892                 case 1:
 893                         m_redirect = UVH_RH_GAM_ALIAS_1_REDIRECT_CONFIG;
 894                         m_overlay  = UVH_RH_GAM_ALIAS_1_OVERLAY_CONFIG;
 895                         break;
 896                 case 2:
 897                         m_redirect = UVH_RH_GAM_ALIAS_2_REDIRECT_CONFIG;
 898                         m_overlay  = UVH_RH_GAM_ALIAS_2_OVERLAY_CONFIG;
 899                         break;
 900                 }
 901                 alias.v = uv_read_local_mmr(m_overlay);
 902                 if (alias.s.enable && alias.s.base == 0) {
 903                         *size = (1UL << alias.s.m_alias);
 904                         redirect.v = uv_read_local_mmr(m_redirect);
 905                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
 906                         return;
 907                 }
 908         }
 909         *base = *size = 0;
 910 }
 911
 912 enum map_type {map_wb, map_uc};
 913 static const char * const mt[] = { "WB", "UC" };
 914
 915 static __init void map_high(char *id, unsigned long base, int pshift, int bshift, int max_pnode, enum map_type map_type)
 916 {
 917         unsigned long bytes, paddr;
 918
 919         paddr = base << pshift;
 920         bytes = (1UL << bshift) * (max_pnode + 1);
 921         if (!paddr) {
 922                 pr_info("UV: Map %s_HI base address NULL\n", id);
 923                 return;
 924         }
 925         if (map_type == map_uc)
 926                 init_extra_mapping_uc(paddr, bytes);
 927         else
 928                 init_extra_mapping_wb(paddr, bytes);
 929
 930         pr_info("UV: Map %s_HI 0x%lx - 0x%lx %s (%d segments)\n",
 931                 id, paddr, paddr + bytes, mt[map_type], max_pnode + 1);
 932 }
 933
 934 static __init void map_gru_high(int max_pnode)
 935 {
 936         union uvh_rh_gam_gru_overlay_config_u gru;
 937         unsigned long mask, base;
 938         int shift;
 939
 940         if (UVH_RH_GAM_GRU_OVERLAY_CONFIG) {
 941                 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG);
 942                 shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
 943                 mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
 944         } else if (UVH_RH10_GAM_GRU_OVERLAY_CONFIG) {
 945                 gru.v = uv_read_local_mmr(UVH_RH10_GAM_GRU_OVERLAY_CONFIG);
 946                 shift = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
 947                 mask = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
 948         } else {
 949                 pr_err("UV: GRU unavailable (no MMR)\n");
 950                 return;
 951         }
 952
 953         if (!gru.s.enable) {
 954                 pr_info("UV: GRU disabled (by BIOS)\n");
 955                 return;
 956         }
 957
 958         base = (gru.v & mask) >> shift;
 959         map_high("GRU", base, shift, shift, max_pnode, map_wb);
 960         gru_start_paddr = ((u64)base << shift);
 961         gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
 962 }
 963
 964 static __init void map_mmr_high(int max_pnode)
 965 {
 966         unsigned long base;
 967         int shift;
 968         bool enable;
 969
 970         if (UVH_RH10_GAM_MMR_OVERLAY_CONFIG) {
 971                 union uvh_rh10_gam_mmr_overlay_config_u mmr;
 972
 973                 mmr.v = uv_read_local_mmr(UVH_RH10_GAM_MMR_OVERLAY_CONFIG);
 974                 enable = mmr.s.enable;
 975                 base = mmr.s.base;
 976                 shift = UVH_RH10_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
 977         } else if (UVH_RH_GAM_MMR_OVERLAY_CONFIG) {
 978                 union uvh_rh_gam_mmr_overlay_config_u mmr;
 979
 980                 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG);
 981                 enable = mmr.s.enable;
 982                 base = mmr.s.base;
 983                 shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
 984         } else {
 985                 pr_err("UV:%s:RH_GAM_MMR_OVERLAY_CONFIG MMR undefined?\n",
 986                         __func__);
 987                 return;
 988         }
 989
 990         if (enable)
 991                 map_high("MMR", base, shift, shift, max_pnode, map_uc);
 992         else
 993                 pr_info("UV: MMR disabled\n");
 994 }
 995
 996 /* Arch specific ENUM cases */
 997 enum mmioh_arch {
 998         UV2_MMIOH = -1,
 999         UVY_MMIOH0, UVY_MMIOH1,
1000         UVX_MMIOH0, UVX_MMIOH1,
1001 };
1002
1003 /* Calculate and Map MMIOH Regions */
1004 static void __init calc_mmioh_map(enum mmioh_arch index,
1005         int min_pnode, int max_pnode,
1006         int shift, unsigned long base, int m_io, int n_io)
1007 {
1008         unsigned long mmr, nasid_mask;
1009         int nasid, min_nasid, max_nasid, lnasid, mapped;
1010         int i, fi, li, n, max_io;
1011         char id[8];
1012
1013         /* One (UV2) mapping */
1014         if (index == UV2_MMIOH) {
1015                 strncpy(id, "MMIOH", sizeof(id));
1016                 max_io = max_pnode;
1017                 mapped = 0;
1018                 goto map_exit;
1019         }
1020
1021         /* small and large MMIOH mappings */
1022         switch (index) {
1023         case UVY_MMIOH0:
1024                 mmr = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG0;
1025                 nasid_mask = UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0_BASE_MASK;
1026                 n = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG0_DEPTH;
1027                 min_nasid = min_pnode;
1028                 max_nasid = max_pnode;
1029                 mapped = 1;
1030                 break;
1031         case UVY_MMIOH1:
1032                 mmr = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG1;
1033                 nasid_mask = UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1_BASE_MASK;
1034                 n = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG1_DEPTH;
1035                 min_nasid = min_pnode;
1036                 max_nasid = max_pnode;
1037                 mapped = 1;
1038                 break;
1039         case UVX_MMIOH0:
1040                 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0;
1041                 nasid_mask = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_BASE_MASK;
1042                 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_DEPTH;
1043                 min_nasid = min_pnode * 2;
1044                 max_nasid = max_pnode * 2;
1045                 mapped = 1;
1046                 break;
1047         case UVX_MMIOH1:
1048                 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1;
1049                 nasid_mask = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_BASE_MASK;
1050                 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_DEPTH;
1051                 min_nasid = min_pnode * 2;
1052                 max_nasid = max_pnode * 2;
1053                 mapped = 1;
1054                 break;
1055         default:
1056                 pr_err("UV:%s:Invalid mapping type:%d\n", __func__, index);
1057                 return;
1058         }
1059
1060         /* enum values chosen so (index mod 2) is MMIOH 0/1 (low/high) */
1061         snprintf(id, sizeof(id), "MMIOH%d", index%2);
1062
1063         max_io = lnasid = fi = li = -1;
1064         for (i = 0; i < n; i++) {
1065                 unsigned long m_redirect = mmr + i * 8;
1066                 unsigned long redirect = uv_read_local_mmr(m_redirect);
1067
1068                 nasid = redirect & nasid_mask;
1069                 if (i == 0)
1070                         pr_info("UV: %s redirect base 0x%lx(@0x%lx) 0x%04x\n",
1071                                 id, redirect, m_redirect, nasid);
1072
1073                 /* Invalid NASID check */
1074                 if (nasid < min_nasid || max_nasid < nasid) {
1075                         pr_err("UV:%s:Invalid NASID:%x (range:%x..%x)\n",
1076                                 __func__, index, min_nasid, max_nasid);
1077                         nasid = -1;
1078                 }
1079
1080                 if (nasid == lnasid) {
1081                         li = i;
1082                         /* Last entry check: */
1083                         if (i != n-1)
1084                                 continue;
1085                 }
1086
1087                 /* Check if we have a cached (or last) redirect to print: */
1088                 if (lnasid != -1 || (i == n-1 && nasid != -1))  {
1089                         unsigned long addr1, addr2;
1090                         int f, l;
1091
1092                         if (lnasid == -1) {
1093                                 f = l = i;
1094                                 lnasid = nasid;
1095                         } else {
1096                                 f = fi;
1097                                 l = li;
1098                         }
1099                         addr1 = (base << shift) + f * (1ULL << m_io);
1100                         addr2 = (base << shift) + (l + 1) * (1ULL << m_io);
1101                         pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n",
1102                                 id, fi, li, lnasid, addr1, addr2);
1103                         if (max_io < l)
1104                                 max_io = l;
1105                 }
1106                 fi = li = i;
1107                 lnasid = nasid;
1108         }
1109
1110 map_exit:
1111         pr_info("UV: %s base:0x%lx shift:%d m_io:%d max_io:%d max_pnode:0x%x\n",
1112                 id, base, shift, m_io, max_io, max_pnode);
1113
1114         if (max_io >= 0 && !mapped)
1115                 map_high(id, base, shift, m_io, max_io, map_uc);
1116 }
1117
1118 static __init void map_mmioh_high(int min_pnode, int max_pnode)
1119 {
1120         /* UVY flavor */
1121         if (UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0) {
1122                 union uvh_rh10_gam_mmioh_overlay_config0_u mmioh0;
1123                 union uvh_rh10_gam_mmioh_overlay_config1_u mmioh1;
1124
1125                 mmioh0.v = uv_read_local_mmr(UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0);
1126                 if (unlikely(mmioh0.s.enable == 0))
1127                         pr_info("UV: MMIOH0 disabled\n");
1128                 else
1129                         calc_mmioh_map(UVY_MMIOH0, min_pnode, max_pnode,
1130                                 UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0_BASE_SHFT,
1131                                 mmioh0.s.base, mmioh0.s.m_io, mmioh0.s.n_io);
1132
1133                 mmioh1.v = uv_read_local_mmr(UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1);
1134                 if (unlikely(mmioh1.s.enable == 0))
1135                         pr_info("UV: MMIOH1 disabled\n");
1136                 else
1137                         calc_mmioh_map(UVY_MMIOH1, min_pnode, max_pnode,
1138                                 UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1_BASE_SHFT,
1139                                 mmioh1.s.base, mmioh1.s.m_io, mmioh1.s.n_io);
1140                 return;
1141         }
1142         /* UVX flavor */
1143         if (UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0) {
1144                 union uvh_rh_gam_mmioh_overlay_config0_u mmioh0;
1145                 union uvh_rh_gam_mmioh_overlay_config1_u mmioh1;
1146
1147                 mmioh0.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0);
1148                 if (unlikely(mmioh0.s.enable == 0))
1149                         pr_info("UV: MMIOH0 disabled\n");
1150                 else {
1151                         unsigned long base = uvxy_field(mmioh0, base, 0);
1152                         int m_io = uvxy_field(mmioh0, m_io, 0);
1153                         int n_io = uvxy_field(mmioh0, n_io, 0);
1154
1155                         calc_mmioh_map(UVX_MMIOH0, min_pnode, max_pnode,
1156                                 UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_BASE_SHFT,
1157                                 base, m_io, n_io);
1158                 }
1159
1160                 mmioh1.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1);
1161                 if (unlikely(mmioh1.s.enable == 0))
1162                         pr_info("UV: MMIOH1 disabled\n");
1163                 else {
1164                         unsigned long base = uvxy_field(mmioh1, base, 0);
1165                         int m_io = uvxy_field(mmioh1, m_io, 0);
1166                         int n_io = uvxy_field(mmioh1, n_io, 0);
1167
1168                         calc_mmioh_map(UVX_MMIOH1, min_pnode, max_pnode,
1169                                 UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_BASE_SHFT,
1170                                 base, m_io, n_io);
1171                 }
1172                 return;
1173         }
1174
1175         /* UV2 flavor */
1176         if (UVH_RH_GAM_MMIOH_OVERLAY_CONFIG) {
1177                 union uvh_rh_gam_mmioh_overlay_config_u mmioh;
1178
1179                 mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG);
1180                 if (unlikely(mmioh.s2.enable == 0))
1181                         pr_info("UV: MMIOH disabled\n");
1182                 else
1183                         calc_mmioh_map(UV2_MMIOH, min_pnode, max_pnode,
1184                                 UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_BASE_SHFT,
1185                                 mmioh.s2.base, mmioh.s2.m_io, mmioh.s2.n_io);
1186                 return;
1187         }
1188 }
1189
1190 static __init void map_low_mmrs(void)
1191 {
1192         if (UV_GLOBAL_MMR32_BASE)
1193                 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
1194
1195         if (UV_LOCAL_MMR_BASE)
1196                 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
1197 }
1198
1199 static __init void uv_rtc_init(void)
1200 {
1201         long status;
1202         u64 ticks_per_sec;
1203
1204         status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec);
1205
1206         if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
1207                 pr_warn("UV: unable to determine platform RTC clock frequency, guessing.\n");
1208
1209                 /* BIOS gives wrong value for clock frequency, so guess: */
1210                 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
1211         } else {
1212                 sn_rtc_cycles_per_second = ticks_per_sec;
1213         }
1214 }
1215
1216 /* Direct Legacy VGA I/O traffic to designated IOH */
1217 static int uv_set_vga_state(struct pci_dev *pdev, bool decode, unsigned int command_bits, u32 flags)
1218 {
1219         int domain, bus, rc;
1220
1221         if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
1222                 return 0;
1223
1224         if ((command_bits & PCI_COMMAND_IO) == 0)
1225                 return 0;
1226
1227         domain = pci_domain_nr(pdev->bus);
1228         bus = pdev->bus->number;
1229
1230         rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
1231
1232         return rc;
1233 }
1234
1235 /*
1236  * Called on each CPU to initialize the per_cpu UV data area.
1237  * FIXME: hotplug not supported yet
1238  */
1239 void uv_cpu_init(void)
1240 {
1241         /* CPU 0 initialization will be done via uv_system_init. */
1242         if (smp_processor_id() == 0)
1243                 return;
1244
1245         uv_hub_info->nr_online_cpus++;
1246 }
1247
1248 struct mn {
1249         unsigned char   m_val;
1250         unsigned char   n_val;
1251         unsigned char   m_shift;
1252         unsigned char   n_lshift;
1253 };
1254
1255 /* Initialize caller's MN struct and fill in values */
1256 static void get_mn(struct mn *mnp)
1257 {
1258         memset(mnp, 0, sizeof(*mnp));
1259         mnp->n_val      = uv_cpuid.n_skt;
1260         if (is_uv(UV4|UVY)) {
1261                 mnp->m_val      = 0;
1262                 mnp->n_lshift   = 0;
1263         } else if (is_uv3_hub()) {
1264                 union uvyh_gr0_gam_gr_config_u m_gr_config;
1265
1266                 mnp->m_val      = uv_cpuid.m_skt;
1267                 m_gr_config.v   = uv_read_local_mmr(UVH_GR0_GAM_GR_CONFIG);
1268                 mnp->n_lshift   = m_gr_config.s3.m_skt;
1269         } else if (is_uv2_hub()) {
1270                 mnp->m_val      = uv_cpuid.m_skt;
1271                 mnp->n_lshift   = mnp->m_val == 40 ? 40 : 39;
1272         }
1273         mnp->m_shift = mnp->m_val ? 64 - mnp->m_val : 0;
1274 }
1275
1276 static void __init uv_init_hub_info(struct uv_hub_info_s *hi)
1277 {
1278         struct mn mn;
1279
1280         get_mn(&mn);
1281         hi->gpa_mask = mn.m_val ?
1282                 (1UL << (mn.m_val + mn.n_val)) - 1 :
1283                 (1UL << uv_cpuid.gpa_shift) - 1;
1284
1285         hi->m_val               = mn.m_val;
1286         hi->n_val               = mn.n_val;
1287         hi->m_shift             = mn.m_shift;
1288         hi->n_lshift            = mn.n_lshift ? mn.n_lshift : 0;
1289         hi->hub_revision        = uv_hub_info->hub_revision;
1290         hi->hub_type            = uv_hub_info->hub_type;
1291         hi->pnode_mask          = uv_cpuid.pnode_mask;
1292         hi->nasid_shift         = uv_cpuid.nasid_shift;
1293         hi->min_pnode           = _min_pnode;
1294         hi->min_socket          = _min_socket;
1295         hi->pnode_to_socket     = _pnode_to_socket;
1296         hi->socket_to_node      = _socket_to_node;
1297         hi->socket_to_pnode     = _socket_to_pnode;
1298         hi->gr_table_len        = _gr_table_len;
1299         hi->gr_table            = _gr_table;
1300
1301         uv_cpuid.gnode_shift    = max_t(unsigned int, uv_cpuid.gnode_shift, mn.n_val);
1302         hi->gnode_extra         = (uv_node_id & ~((1 << uv_cpuid.gnode_shift) - 1)) >> 1;
1303         if (mn.m_val)
1304                 hi->gnode_upper = (u64)hi->gnode_extra << mn.m_val;
1305
1306         if (uv_gp_table) {
1307                 hi->global_mmr_base     = uv_gp_table->mmr_base;
1308                 hi->global_mmr_shift    = uv_gp_table->mmr_shift;
1309                 hi->global_gru_base     = uv_gp_table->gru_base;
1310                 hi->global_gru_shift    = uv_gp_table->gru_shift;
1311                 hi->gpa_shift           = uv_gp_table->gpa_shift;
1312                 hi->gpa_mask            = (1UL << hi->gpa_shift) - 1;
1313         } else {
1314                 hi->global_mmr_base     =
1315                         uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG) &
1316                         ~UV_MMR_ENABLE;
1317                 hi->global_mmr_shift    = _UV_GLOBAL_MMR64_PNODE_SHIFT;
1318         }
1319
1320         get_lowmem_redirect(&hi->lowmem_remap_base, &hi->lowmem_remap_top);
1321
1322         hi->apic_pnode_shift = uv_cpuid.socketid_shift;
1323
1324         /* Show system specific info: */
1325         pr_info("UV: N:%d M:%d m_shift:%d n_lshift:%d\n", hi->n_val, hi->m_val, hi->m_shift, hi->n_lshift);
1326         pr_info("UV: gpa_mask/shift:0x%lx/%d pnode_mask:0x%x apic_pns:%d\n", hi->gpa_mask, hi->gpa_shift, hi->pnode_mask, hi->apic_pnode_shift);
1327         pr_info("UV: mmr_base/shift:0x%lx/%ld\n", hi->global_mmr_base, hi->global_mmr_shift);
1328         if (hi->global_gru_base)
1329                 pr_info("UV: gru_base/shift:0x%lx/%ld\n",
1330                         hi->global_gru_base, hi->global_gru_shift);
1331
1332         pr_info("UV: gnode_upper:0x%lx gnode_extra:0x%x\n", hi->gnode_upper, hi->gnode_extra);
1333 }
1334
1335 static void __init decode_gam_params(unsigned long ptr)
1336 {
1337         uv_gp_table = (struct uv_gam_parameters *)ptr;
1338
1339         pr_info("UV: GAM Params...\n");
1340         pr_info("UV: mmr_base/shift:0x%llx/%d gru_base/shift:0x%llx/%d gpa_shift:%d\n",
1341                 uv_gp_table->mmr_base, uv_gp_table->mmr_shift,
1342                 uv_gp_table->gru_base, uv_gp_table->gru_shift,
1343                 uv_gp_table->gpa_shift);
1344 }
1345
1346 static void __init decode_gam_rng_tbl(unsigned long ptr)
1347 {
1348         struct uv_gam_range_entry *gre = (struct uv_gam_range_entry *)ptr;
1349         unsigned long lgre = 0;
1350         int index = 0;
1351         int sock_min = 999999, pnode_min = 99999;
1352         int sock_max = -1, pnode_max = -1;
1353
1354         uv_gre_table = gre;
1355         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1356                 unsigned long size = ((unsigned long)(gre->limit - lgre)
1357                                         << UV_GAM_RANGE_SHFT);
1358                 int order = 0;
1359                 char suffix[] = " KMGTPE";
1360                 int flag = ' ';
1361
1362                 while (size > 9999 && order < sizeof(suffix)) {
1363                         size /= 1024;
1364                         order++;
1365                 }
1366
1367                 /* adjust max block size to current range start */
1368                 if (gre->type == 1 || gre->type == 2)
1369                         if (adj_blksize(lgre))
1370                                 flag = '*';
1371
1372                 if (!index) {
1373                         pr_info("UV: GAM Range Table...\n");
1374                         pr_info("UV:  # %20s %14s %6s %4s %5s %3s %2s\n", "Range", "", "Size", "Type", "NASID", "SID", "PN");
1375                 }
1376                 pr_info("UV: %2d: 0x%014lx-0x%014lx%c %5lu%c %3d   %04x  %02x %02x\n",
1377                         index++,
1378                         (unsigned long)lgre << UV_GAM_RANGE_SHFT,
1379                         (unsigned long)gre->limit << UV_GAM_RANGE_SHFT,
1380                         flag, size, suffix[order],
1381                         gre->type, gre->nasid, gre->sockid, gre->pnode);
1382
1383                 /* update to next range start */
1384                 lgre = gre->limit;
1385                 if (sock_min > gre->sockid)
1386                         sock_min = gre->sockid;
1387                 if (sock_max < gre->sockid)
1388                         sock_max = gre->sockid;
1389                 if (pnode_min > gre->pnode)
1390                         pnode_min = gre->pnode;
1391                 if (pnode_max < gre->pnode)
1392                         pnode_max = gre->pnode;
1393         }
1394         _min_socket     = sock_min;
1395         _max_socket     = sock_max;
1396         _min_pnode      = pnode_min;
1397         _max_pnode      = pnode_max;
1398         _gr_table_len   = index;
1399
1400         pr_info("UV: GRT: %d entries, sockets(min:%x,max:%x) pnodes(min:%x,max:%x)\n", index, _min_socket, _max_socket, _min_pnode, _max_pnode);
1401 }
1402
1403 /* Walk through UVsystab decoding the fields */
1404 static int __init decode_uv_systab(void)
1405 {
1406         struct uv_systab *st;
1407         int i;
1408
1409         /* Get mapped UVsystab pointer */
1410         st = uv_systab;
1411
1412         /* If UVsystab is version 1, there is no extended UVsystab */
1413         if (st && st->revision == UV_SYSTAB_VERSION_1)
1414                 return 0;
1415
1416         if ((!st) || (st->revision < UV_SYSTAB_VERSION_UV4_LATEST)) {
1417                 int rev = st ? st->revision : 0;
1418
1419                 pr_err("UV: BIOS UVsystab mismatch, (%x < %x)\n",
1420                         rev, UV_SYSTAB_VERSION_UV4_LATEST);
1421                 pr_err("UV: Does not support UV, switch to non-UV x86_64\n");
1422                 uv_system_type = UV_NONE;
1423
1424                 return -EINVAL;
1425         }
1426
1427         for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
1428                 unsigned long ptr = st->entry[i].offset;
1429
1430                 if (!ptr)
1431                         continue;
1432
1433                 /* point to payload */
1434                 ptr += (unsigned long)st;
1435
1436                 switch (st->entry[i].type) {
1437                 case UV_SYSTAB_TYPE_GAM_PARAMS:
1438                         decode_gam_params(ptr);
1439                         break;
1440
1441                 case UV_SYSTAB_TYPE_GAM_RNG_TBL:
1442                         decode_gam_rng_tbl(ptr);
1443                         break;
1444
1445                 case UV_SYSTAB_TYPE_ARCH_TYPE:
1446                         /* already processed in early startup */
1447                         break;
1448
1449                 default:
1450                         pr_err("UV:%s:Unrecognized UV_SYSTAB_TYPE:%d, skipped\n",
1451                                 __func__, st->entry[i].type);
1452                         break;
1453                 }
1454         }
1455         return 0;
1456 }
1457
1458 /* Set up physical blade translations from UVH_NODE_PRESENT_TABLE */
1459 static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
1460 {
1461         unsigned long np;
1462         int i, uv_pb = 0;
1463
1464         if (UVH_NODE_PRESENT_TABLE) {
1465                 pr_info("UV: NODE_PRESENT_DEPTH = %d\n",
1466                         UVH_NODE_PRESENT_TABLE_DEPTH);
1467                 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
1468                         np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
1469                         pr_info("UV: NODE_PRESENT(%d) = 0x%016lx\n", i, np);
1470                         uv_pb += hweight64(np);
1471                 }
1472         }
1473         if (UVH_NODE_PRESENT_0) {
1474                 np = uv_read_local_mmr(UVH_NODE_PRESENT_0);
1475                 pr_info("UV: NODE_PRESENT_0 = 0x%016lx\n", np);
1476                 uv_pb += hweight64(np);
1477         }
1478         if (UVH_NODE_PRESENT_1) {
1479                 np = uv_read_local_mmr(UVH_NODE_PRESENT_1);
1480                 pr_info("UV: NODE_PRESENT_1 = 0x%016lx\n", np);
1481                 uv_pb += hweight64(np);
1482         }
1483         if (uv_possible_blades != uv_pb)
1484                 uv_possible_blades = uv_pb;
1485
1486         pr_info("UV: number nodes/possible blades %d\n", uv_pb);
1487 }
1488
1489 static void __init build_socket_tables(void)
1490 {
1491         struct uv_gam_range_entry *gre = uv_gre_table;
1492         int num, nump;
1493         int cpu, i, lnid;
1494         int minsock = _min_socket;
1495         int maxsock = _max_socket;
1496         int minpnode = _min_pnode;
1497         int maxpnode = _max_pnode;
1498         size_t bytes;
1499
1500         if (!gre) {
1501                 if (is_uv2_hub() || is_uv3_hub()) {
1502                         pr_info("UV: No UVsystab socket table, ignoring\n");
1503                         return;
1504                 }
1505                 pr_err("UV: Error: UVsystab address translations not available!\n");
1506                 BUG();
1507         }
1508
1509         /* Build socket id -> node id, pnode */
1510         num = maxsock - minsock + 1;
1511         bytes = num * sizeof(_socket_to_node[0]);
1512         _socket_to_node = kmalloc(bytes, GFP_KERNEL);
1513         _socket_to_pnode = kmalloc(bytes, GFP_KERNEL);
1514
1515         nump = maxpnode - minpnode + 1;
1516         bytes = nump * sizeof(_pnode_to_socket[0]);
1517         _pnode_to_socket = kmalloc(bytes, GFP_KERNEL);
1518         BUG_ON(!_socket_to_node || !_socket_to_pnode || !_pnode_to_socket);
1519
1520         for (i = 0; i < num; i++)
1521                 _socket_to_node[i] = _socket_to_pnode[i] = SOCK_EMPTY;
1522
1523         for (i = 0; i < nump; i++)
1524                 _pnode_to_socket[i] = SOCK_EMPTY;
1525
1526         /* Fill in pnode/node/addr conversion list values: */
1527         pr_info("UV: GAM Building socket/pnode conversion tables\n");
1528         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1529                 if (gre->type == UV_GAM_RANGE_TYPE_HOLE)
1530                         continue;
1531                 i = gre->sockid - minsock;
1532                 /* Duplicate: */
1533                 if (_socket_to_pnode[i] != SOCK_EMPTY)
1534                         continue;
1535                 _socket_to_pnode[i] = gre->pnode;
1536
1537                 i = gre->pnode - minpnode;
1538                 _pnode_to_socket[i] = gre->sockid;
1539
1540                 pr_info("UV: sid:%02x type:%d nasid:%04x pn:%02x pn2s:%2x\n",
1541                         gre->sockid, gre->type, gre->nasid,
1542                         _socket_to_pnode[gre->sockid - minsock],
1543                         _pnode_to_socket[gre->pnode - minpnode]);
1544         }
1545
1546         /* Set socket -> node values: */
1547         lnid = NUMA_NO_NODE;
1548         for_each_present_cpu(cpu) {
1549                 int nid = cpu_to_node(cpu);
1550                 int apicid, sockid;
1551
1552                 if (lnid == nid)
1553                         continue;
1554                 lnid = nid;
1555                 apicid = per_cpu(x86_cpu_to_apicid, cpu);
1556                 sockid = apicid >> uv_cpuid.socketid_shift;
1557                 _socket_to_node[sockid - minsock] = nid;
1558                 pr_info("UV: sid:%02x: apicid:%04x node:%2d\n",
1559                         sockid, apicid, nid);
1560         }
1561
1562         /* Set up physical blade to pnode translation from GAM Range Table: */
1563         bytes = num_possible_nodes() * sizeof(_node_to_pnode[0]);
1564         _node_to_pnode = kmalloc(bytes, GFP_KERNEL);
1565         BUG_ON(!_node_to_pnode);
1566
1567         for (lnid = 0; lnid < num_possible_nodes(); lnid++) {
1568                 unsigned short sockid;
1569
1570                 for (sockid = minsock; sockid <= maxsock; sockid++) {
1571                         if (lnid == _socket_to_node[sockid - minsock]) {
1572                                 _node_to_pnode[lnid] = _socket_to_pnode[sockid - minsock];
1573                                 break;
1574                         }
1575                 }
1576                 if (sockid > maxsock) {
1577                         pr_err("UV: socket for node %d not found!\n", lnid);
1578                         BUG();
1579                 }
1580         }
1581
1582         /*
1583          * If socket id == pnode or socket id == node for all nodes,
1584          *   system runs faster by removing corresponding conversion table.
1585          */
1586         pr_info("UV: Checking socket->node/pnode for identity maps\n");
1587         if (minsock == 0) {
1588                 for (i = 0; i < num; i++)
1589                         if (_socket_to_node[i] == SOCK_EMPTY || i != _socket_to_node[i])
1590                                 break;
1591                 if (i >= num) {
1592                         kfree(_socket_to_node);
1593                         _socket_to_node = NULL;
1594                         pr_info("UV: 1:1 socket_to_node table removed\n");
1595                 }
1596         }
1597         if (minsock == minpnode) {
1598                 for (i = 0; i < num; i++)
1599                         if (_socket_to_pnode[i] != SOCK_EMPTY &&
1600                                 _socket_to_pnode[i] != i + minpnode)
1601                                 break;
1602                 if (i >= num) {
1603                         kfree(_socket_to_pnode);
1604                         _socket_to_pnode = NULL;
1605                         pr_info("UV: 1:1 socket_to_pnode table removed\n");
1606                 }
1607         }
1608 }
1609
1610 /* Check which reboot to use */
1611 static void check_efi_reboot(void)
1612 {
1613         /* If EFI reboot not available, use ACPI reboot */
1614         if (!efi_enabled(EFI_BOOT))
1615                 reboot_type = BOOT_ACPI;
1616 }
1617
1618 /*
1619  * User proc fs file handling now deprecated.
1620  * Recommend using /sys/firmware/sgi_uv/... instead.
1621  */
1622 static int __maybe_unused proc_hubbed_show(struct seq_file *file, void *data)
1623 {
1624         pr_notice_once("%s: using deprecated /proc/sgi_uv/hubbed, use /sys/firmware/sgi_uv/hub_type\n",
1625                        current->comm);
1626         seq_printf(file, "0x%x\n", uv_hubbed_system);
1627         return 0;
1628 }
1629
1630 static int __maybe_unused proc_hubless_show(struct seq_file *file, void *data)
1631 {
1632         pr_notice_once("%s: using deprecated /proc/sgi_uv/hubless, use /sys/firmware/sgi_uv/hubless\n",
1633                        current->comm);
1634         seq_printf(file, "0x%x\n", uv_hubless_system);
1635         return 0;
1636 }
1637
1638 static int __maybe_unused proc_archtype_show(struct seq_file *file, void *data)
1639 {
1640         pr_notice_once("%s: using deprecated /proc/sgi_uv/archtype, use /sys/firmware/sgi_uv/archtype\n",
1641                        current->comm);
1642         seq_printf(file, "%s/%s\n", uv_archtype, oem_table_id);
1643         return 0;
1644 }
1645
1646 static __init void uv_setup_proc_files(int hubless)
1647 {
1648         struct proc_dir_entry *pde;
1649
1650         pde = proc_mkdir(UV_PROC_NODE, NULL);
1651         proc_create_single("archtype", 0, pde, proc_archtype_show);
1652         if (hubless)
1653                 proc_create_single("hubless", 0, pde, proc_hubless_show);
1654         else
1655                 proc_create_single("hubbed", 0, pde, proc_hubbed_show);
1656 }
1657
1658 /* Initialize UV hubless systems */
1659 static __init int uv_system_init_hubless(void)
1660 {
1661         int rc;
1662
1663         /* Setup PCH NMI handler */
1664         uv_nmi_setup_hubless();
1665
1666         /* Init kernel/BIOS interface */
1667         rc = uv_bios_init();
1668         if (rc < 0)
1669                 return rc;
1670
1671         /* Process UVsystab */
1672         rc = decode_uv_systab();
1673         if (rc < 0)
1674                 return rc;
1675
1676         /* Create user access node */
1677         if (rc >= 0)
1678                 uv_setup_proc_files(1);
1679
1680         check_efi_reboot();
1681
1682         return rc;
1683 }
1684
1685 static void __init uv_system_init_hub(void)
1686 {
1687         struct uv_hub_info_s hub_info = {0};
1688         int bytes, cpu, nodeid;
1689         unsigned short min_pnode = 9999, max_pnode = 0;
1690         char *hub = is_uv5_hub() ? "UV500" :
1691                     is_uv4_hub() ? "UV400" :
1692                     is_uv3_hub() ? "UV300" :
1693                     is_uv2_hub() ? "UV2000/3000" : NULL;
1694
1695         if (!hub) {
1696                 pr_err("UV: Unknown/unsupported UV hub\n");
1697                 return;
1698         }
1699         pr_info("UV: Found %s hub\n", hub);
1700
1701         map_low_mmrs();
1702
1703         /* Get uv_systab for decoding, setup UV BIOS calls */
1704         uv_bios_init();
1705
1706         /* If there's an UVsystab problem then abort UV init: */
1707         if (decode_uv_systab() < 0) {
1708                 pr_err("UV: Mangled UVsystab format\n");
1709                 return;
1710         }
1711
1712         build_socket_tables();
1713         build_uv_gr_table();
1714         set_block_size();
1715         uv_init_hub_info(&hub_info);
1716         uv_possible_blades = num_possible_nodes();
1717         if (!_node_to_pnode)
1718                 boot_init_possible_blades(&hub_info);
1719
1720         /* uv_num_possible_blades() is really the hub count: */
1721         pr_info("UV: Found %d hubs, %d nodes, %d CPUs\n", uv_num_possible_blades(), num_possible_nodes(), num_possible_cpus());
1722
1723         uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id, &sn_region_size, &system_serial_number);
1724         hub_info.coherency_domain_number = sn_coherency_id;
1725         uv_rtc_init();
1726
1727         bytes = sizeof(void *) * uv_num_possible_blades();
1728         __uv_hub_info_list = kzalloc(bytes, GFP_KERNEL);
1729         BUG_ON(!__uv_hub_info_list);
1730
1731         bytes = sizeof(struct uv_hub_info_s);
1732         for_each_node(nodeid) {
1733                 struct uv_hub_info_s *new_hub;
1734
1735                 if (__uv_hub_info_list[nodeid]) {
1736                         pr_err("UV: Node %d UV HUB already initialized!?\n", nodeid);
1737                         BUG();
1738                 }
1739
1740                 /* Allocate new per hub info list */
1741                 new_hub = (nodeid == 0) ?  &uv_hub_info_node0 : kzalloc_node(bytes, GFP_KERNEL, nodeid);
1742                 BUG_ON(!new_hub);
1743                 __uv_hub_info_list[nodeid] = new_hub;
1744                 new_hub = uv_hub_info_list(nodeid);
1745                 BUG_ON(!new_hub);
1746                 *new_hub = hub_info;
1747
1748                 /* Use information from GAM table if available: */
1749                 if (_node_to_pnode)
1750                         new_hub->pnode = _node_to_pnode[nodeid];
1751                 else /* Or fill in during CPU loop: */
1752                         new_hub->pnode = 0xffff;
1753
1754                 new_hub->numa_blade_id = uv_node_to_blade_id(nodeid);
1755                 new_hub->memory_nid = NUMA_NO_NODE;
1756                 new_hub->nr_possible_cpus = 0;
1757                 new_hub->nr_online_cpus = 0;
1758         }
1759
1760         /* Initialize per CPU info: */
1761         for_each_possible_cpu(cpu) {
1762                 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
1763                 int numa_node_id;
1764                 unsigned short pnode;
1765
1766                 nodeid = cpu_to_node(cpu);
1767                 numa_node_id = numa_cpu_node(cpu);
1768                 pnode = uv_apicid_to_pnode(apicid);
1769
1770                 uv_cpu_info_per(cpu)->p_uv_hub_info = uv_hub_info_list(nodeid);
1771                 uv_cpu_info_per(cpu)->blade_cpu_id = uv_cpu_hub_info(cpu)->nr_possible_cpus++;
1772                 if (uv_cpu_hub_info(cpu)->memory_nid == NUMA_NO_NODE)
1773                         uv_cpu_hub_info(cpu)->memory_nid = cpu_to_node(cpu);
1774
1775                 /* Init memoryless node: */
1776                 if (nodeid != numa_node_id &&
1777                     uv_hub_info_list(numa_node_id)->pnode == 0xffff)
1778                         uv_hub_info_list(numa_node_id)->pnode = pnode;
1779                 else if (uv_cpu_hub_info(cpu)->pnode == 0xffff)
1780                         uv_cpu_hub_info(cpu)->pnode = pnode;
1781         }
1782
1783         for_each_node(nodeid) {
1784                 unsigned short pnode = uv_hub_info_list(nodeid)->pnode;
1785
1786                 /* Add pnode info for pre-GAM list nodes without CPUs: */
1787                 if (pnode == 0xffff) {
1788                         unsigned long paddr;
1789
1790                         paddr = node_start_pfn(nodeid) << PAGE_SHIFT;
1791                         pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr));
1792                         uv_hub_info_list(nodeid)->pnode = pnode;
1793                 }
1794                 min_pnode = min(pnode, min_pnode);
1795                 max_pnode = max(pnode, max_pnode);
1796                 pr_info("UV: UVHUB node:%2d pn:%02x nrcpus:%d\n",
1797                         nodeid,
1798                         uv_hub_info_list(nodeid)->pnode,
1799                         uv_hub_info_list(nodeid)->nr_possible_cpus);
1800         }
1801
1802         pr_info("UV: min_pnode:%02x max_pnode:%02x\n", min_pnode, max_pnode);
1803         map_gru_high(max_pnode);
1804         map_mmr_high(max_pnode);
1805         map_mmioh_high(min_pnode, max_pnode);
1806
1807         uv_nmi_setup();
1808         uv_cpu_init();
1809         uv_setup_proc_files(0);
1810
1811         /* Register Legacy VGA I/O redirection handler: */
1812         pci_register_set_vga_state(uv_set_vga_state);
1813
1814         check_efi_reboot();
1815 }
1816
1817 /*
1818  * There is a different code path needed to initialize a UV system that does
1819  * not have a "UV HUB" (referred to as "hubless").
1820  */
1821 void __init uv_system_init(void)
1822 {
1823         if (likely(!is_uv_system() && !is_uv_hubless(1)))
1824                 return;
1825
1826         if (is_uv_system())
1827                 uv_system_init_hub();
1828         else
1829                 uv_system_init_hubless();
1830 }
1831
1832 apic_driver(apic_x2apic_uv_x);