Merge tag 'vfs-6.7.misc' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs
[linux-block.git] / 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 #include "local.h"
29
30 static enum uv_system_type      uv_system_type;
31 static int                      uv_hubbed_system;
32 static int                      uv_hubless_system;
33 static u64                      gru_start_paddr, gru_end_paddr;
34 static union uvh_apicid         uvh_apicid;
35 static int                      uv_node_id;
36
37 /* Unpack AT/OEM/TABLE ID's to be NULL terminated strings */
38 static u8 uv_archtype[UV_AT_SIZE + 1];
39 static u8 oem_id[ACPI_OEM_ID_SIZE + 1];
40 static u8 oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1];
41
42 /* Information derived from CPUID and some UV MMRs */
43 static struct {
44         unsigned int apicid_shift;
45         unsigned int apicid_mask;
46         unsigned int socketid_shift;    /* aka pnode_shift for UV2/3 */
47         unsigned int pnode_mask;
48         unsigned int nasid_shift;
49         unsigned int gpa_shift;
50         unsigned int gnode_shift;
51         unsigned int m_skt;
52         unsigned int n_skt;
53 } uv_cpuid;
54
55 static int uv_min_hub_revision_id;
56
57 static struct apic apic_x2apic_uv_x;
58 static struct uv_hub_info_s uv_hub_info_node0;
59
60 /* Set this to use hardware error handler instead of kernel panic: */
61 static int disable_uv_undefined_panic = 1;
62
63 unsigned long uv_undefined(char *str)
64 {
65         if (likely(!disable_uv_undefined_panic))
66                 panic("UV: error: undefined MMR: %s\n", str);
67         else
68                 pr_crit("UV: error: undefined MMR: %s\n", str);
69
70         /* Cause a machine fault: */
71         return ~0ul;
72 }
73 EXPORT_SYMBOL(uv_undefined);
74
75 static unsigned long __init uv_early_read_mmr(unsigned long addr)
76 {
77         unsigned long val, *mmr;
78
79         mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr));
80         val = *mmr;
81         early_iounmap(mmr, sizeof(*mmr));
82
83         return val;
84 }
85
86 static inline bool is_GRU_range(u64 start, u64 end)
87 {
88         if (!gru_start_paddr)
89                 return false;
90
91         return start >= gru_start_paddr && end <= gru_end_paddr;
92 }
93
94 static bool uv_is_untracked_pat_range(u64 start, u64 end)
95 {
96         return is_ISA_range(start, end) || is_GRU_range(start, end);
97 }
98
99 static void __init early_get_pnodeid(void)
100 {
101         int pnode;
102
103         uv_cpuid.m_skt = 0;
104         if (UVH_RH10_GAM_ADDR_MAP_CONFIG) {
105                 union uvh_rh10_gam_addr_map_config_u  m_n_config;
106
107                 m_n_config.v = uv_early_read_mmr(UVH_RH10_GAM_ADDR_MAP_CONFIG);
108                 uv_cpuid.n_skt = m_n_config.s.n_skt;
109                 uv_cpuid.nasid_shift = 0;
110         } else if (UVH_RH_GAM_ADDR_MAP_CONFIG) {
111                 union uvh_rh_gam_addr_map_config_u  m_n_config;
112
113         m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_ADDR_MAP_CONFIG);
114                 uv_cpuid.n_skt = m_n_config.s.n_skt;
115                 if (is_uv(UV3))
116                         uv_cpuid.m_skt = m_n_config.s3.m_skt;
117                 if (is_uv(UV2))
118                         uv_cpuid.m_skt = m_n_config.s2.m_skt;
119                 uv_cpuid.nasid_shift = 1;
120         } else {
121                 unsigned long GAM_ADDR_MAP_CONFIG = 0;
122
123                 WARN(GAM_ADDR_MAP_CONFIG == 0,
124                         "UV: WARN: GAM_ADDR_MAP_CONFIG is not available\n");
125                 uv_cpuid.n_skt = 0;
126                 uv_cpuid.nasid_shift = 0;
127         }
128
129         if (is_uv(UV4|UVY))
130                 uv_cpuid.gnode_shift = 2; /* min partition is 4 sockets */
131
132         uv_cpuid.pnode_mask = (1 << uv_cpuid.n_skt) - 1;
133         pnode = (uv_node_id >> uv_cpuid.nasid_shift) & uv_cpuid.pnode_mask;
134         uv_cpuid.gpa_shift = 46;        /* Default unless changed */
135
136         pr_info("UV: n_skt:%d pnmsk:%x pn:%x\n",
137                 uv_cpuid.n_skt, uv_cpuid.pnode_mask, pnode);
138 }
139
140 /* Running on a UV Hubbed system, determine which UV Hub Type it is */
141 static int __init early_set_hub_type(void)
142 {
143         union uvh_node_id_u node_id;
144
145         /*
146          * The NODE_ID MMR is always at offset 0.
147          * Contains the chip part # + revision.
148          * Node_id field started with 15 bits,
149          * ... now 7 but upper 8 are masked to 0.
150          * All blades/nodes have the same part # and hub revision.
151          */
152         node_id.v = uv_early_read_mmr(UVH_NODE_ID);
153         uv_node_id = node_id.sx.node_id;
154
155         switch (node_id.s.part_number) {
156
157         case UV5_HUB_PART_NUMBER:
158                 uv_min_hub_revision_id = node_id.s.revision
159                                          + UV5_HUB_REVISION_BASE;
160                 uv_hub_type_set(UV5);
161                 break;
162
163         /* UV4/4A only have a revision difference */
164         case UV4_HUB_PART_NUMBER:
165                 uv_min_hub_revision_id = node_id.s.revision
166                                          + UV4_HUB_REVISION_BASE - 1;
167                 uv_hub_type_set(UV4);
168                 if (uv_min_hub_revision_id == UV4A_HUB_REVISION_BASE)
169                         uv_hub_type_set(UV4|UV4A);
170                 break;
171
172         case UV3_HUB_PART_NUMBER:
173         case UV3_HUB_PART_NUMBER_X:
174                 uv_min_hub_revision_id = node_id.s.revision
175                                          + UV3_HUB_REVISION_BASE;
176                 uv_hub_type_set(UV3);
177                 break;
178
179         case UV2_HUB_PART_NUMBER:
180         case UV2_HUB_PART_NUMBER_X:
181                 uv_min_hub_revision_id = node_id.s.revision
182                                          + UV2_HUB_REVISION_BASE - 1;
183                 uv_hub_type_set(UV2);
184                 break;
185
186         default:
187                 return 0;
188         }
189
190         pr_info("UV: part#:%x rev:%d rev_id:%d UVtype:0x%x\n",
191                 node_id.s.part_number, node_id.s.revision,
192                 uv_min_hub_revision_id, is_uv(~0));
193
194         return 1;
195 }
196
197 static void __init uv_tsc_check_sync(void)
198 {
199         u64 mmr;
200         int sync_state;
201         int mmr_shift;
202         char *state;
203
204         /* UV5 guarantees synced TSCs; do not zero TSC_ADJUST */
205         if (!is_uv(UV2|UV3|UV4)) {
206                 mark_tsc_async_resets("UV5+");
207                 return;
208         }
209
210         /* UV2,3,4, UV BIOS TSC sync state available */
211         mmr = uv_early_read_mmr(UVH_TSC_SYNC_MMR);
212         mmr_shift =
213                 is_uv2_hub() ? UVH_TSC_SYNC_SHIFT_UV2K : UVH_TSC_SYNC_SHIFT;
214         sync_state = (mmr >> mmr_shift) & UVH_TSC_SYNC_MASK;
215
216         /* Check if TSC is valid for all sockets */
217         switch (sync_state) {
218         case UVH_TSC_SYNC_VALID:
219                 state = "in sync";
220                 mark_tsc_async_resets("UV BIOS");
221                 break;
222
223         /* If BIOS state unknown, don't do anything */
224         case UVH_TSC_SYNC_UNKNOWN:
225                 state = "unknown";
226                 break;
227
228         /* Otherwise, BIOS indicates problem with TSC */
229         default:
230                 state = "unstable";
231                 mark_tsc_unstable("UV BIOS");
232                 break;
233         }
234         pr_info("UV: TSC sync state from BIOS:0%d(%s)\n", sync_state, state);
235 }
236
237 /* Selector for (4|4A|5) structs */
238 #define uvxy_field(sname, field, undef) (       \
239         is_uv(UV4A) ? sname.s4a.field :         \
240         is_uv(UV4) ? sname.s4.field :           \
241         is_uv(UV3) ? sname.s3.field :           \
242         undef)
243
244 /* [Copied from arch/x86/kernel/cpu/topology.c:detect_extended_topology()] */
245
246 #define SMT_LEVEL                       0       /* Leaf 0xb SMT level */
247 #define INVALID_TYPE                    0       /* Leaf 0xb sub-leaf types */
248 #define SMT_TYPE                        1
249 #define CORE_TYPE                       2
250 #define LEAFB_SUBTYPE(ecx)              (((ecx) >> 8) & 0xff)
251 #define BITS_SHIFT_NEXT_LEVEL(eax)      ((eax) & 0x1f)
252
253 static void set_x2apic_bits(void)
254 {
255         unsigned int eax, ebx, ecx, edx, sub_index;
256         unsigned int sid_shift;
257
258         cpuid(0, &eax, &ebx, &ecx, &edx);
259         if (eax < 0xb) {
260                 pr_info("UV: CPU does not have CPUID.11\n");
261                 return;
262         }
263
264         cpuid_count(0xb, SMT_LEVEL, &eax, &ebx, &ecx, &edx);
265         if (ebx == 0 || (LEAFB_SUBTYPE(ecx) != SMT_TYPE)) {
266                 pr_info("UV: CPUID.11 not implemented\n");
267                 return;
268         }
269
270         sid_shift = BITS_SHIFT_NEXT_LEVEL(eax);
271         sub_index = 1;
272         do {
273                 cpuid_count(0xb, sub_index, &eax, &ebx, &ecx, &edx);
274                 if (LEAFB_SUBTYPE(ecx) == CORE_TYPE) {
275                         sid_shift = BITS_SHIFT_NEXT_LEVEL(eax);
276                         break;
277                 }
278                 sub_index++;
279         } while (LEAFB_SUBTYPE(ecx) != INVALID_TYPE);
280
281         uv_cpuid.apicid_shift   = 0;
282         uv_cpuid.apicid_mask    = (~(-1 << sid_shift));
283         uv_cpuid.socketid_shift = sid_shift;
284 }
285
286 static void __init early_get_apic_socketid_shift(void)
287 {
288         if (is_uv2_hub() || is_uv3_hub())
289                 uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
290
291         set_x2apic_bits();
292
293         pr_info("UV: apicid_shift:%d apicid_mask:0x%x\n", uv_cpuid.apicid_shift, uv_cpuid.apicid_mask);
294         pr_info("UV: socketid_shift:%d pnode_mask:0x%x\n", uv_cpuid.socketid_shift, uv_cpuid.pnode_mask);
295 }
296
297 static void __init uv_stringify(int len, char *to, char *from)
298 {
299         strscpy(to, from, len);
300
301         /* Trim trailing spaces */
302         (void)strim(to);
303 }
304
305 /* Find UV arch type entry in UVsystab */
306 static unsigned long __init early_find_archtype(struct uv_systab *st)
307 {
308         int i;
309
310         for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
311                 unsigned long ptr = st->entry[i].offset;
312
313                 if (!ptr)
314                         continue;
315                 ptr += (unsigned long)st;
316                 if (st->entry[i].type == UV_SYSTAB_TYPE_ARCH_TYPE)
317                         return ptr;
318         }
319         return 0;
320 }
321
322 /* Validate UV arch type field in UVsystab */
323 static int __init decode_arch_type(unsigned long ptr)
324 {
325         struct uv_arch_type_entry *uv_ate = (struct uv_arch_type_entry *)ptr;
326         int n = strlen(uv_ate->archtype);
327
328         if (n > 0 && n < sizeof(uv_ate->archtype)) {
329                 pr_info("UV: UVarchtype received from BIOS\n");
330                 uv_stringify(sizeof(uv_archtype), uv_archtype, uv_ate->archtype);
331                 return 1;
332         }
333         return 0;
334 }
335
336 /* Determine if UV arch type entry might exist in UVsystab */
337 static int __init early_get_arch_type(void)
338 {
339         unsigned long uvst_physaddr, uvst_size, ptr;
340         struct uv_systab *st;
341         u32 rev;
342         int ret;
343
344         uvst_physaddr = get_uv_systab_phys(0);
345         if (!uvst_physaddr)
346                 return 0;
347
348         st = early_memremap_ro(uvst_physaddr, sizeof(struct uv_systab));
349         if (!st) {
350                 pr_err("UV: Cannot access UVsystab, remap failed\n");
351                 return 0;
352         }
353
354         rev = st->revision;
355         if (rev < UV_SYSTAB_VERSION_UV5) {
356                 early_memunmap(st, sizeof(struct uv_systab));
357                 return 0;
358         }
359
360         uvst_size = st->size;
361         early_memunmap(st, sizeof(struct uv_systab));
362         st = early_memremap_ro(uvst_physaddr, uvst_size);
363         if (!st) {
364                 pr_err("UV: Cannot access UVarchtype, remap failed\n");
365                 return 0;
366         }
367
368         ptr = early_find_archtype(st);
369         if (!ptr) {
370                 early_memunmap(st, uvst_size);
371                 return 0;
372         }
373
374         ret = decode_arch_type(ptr);
375         early_memunmap(st, uvst_size);
376         return ret;
377 }
378
379 /* UV system found, check which APIC MODE BIOS already selected */
380 static void __init early_set_apic_mode(void)
381 {
382         if (x2apic_enabled())
383                 uv_system_type = UV_X2APIC;
384         else
385                 uv_system_type = UV_LEGACY_APIC;
386 }
387
388 static int __init uv_set_system_type(char *_oem_id, char *_oem_table_id)
389 {
390         /* Save OEM_ID passed from ACPI MADT */
391         uv_stringify(sizeof(oem_id), oem_id, _oem_id);
392
393         /* Check if BIOS sent us a UVarchtype */
394         if (!early_get_arch_type())
395
396                 /* If not use OEM ID for UVarchtype */
397                 uv_stringify(sizeof(uv_archtype), uv_archtype, oem_id);
398
399         /* Check if not hubbed */
400         if (strncmp(uv_archtype, "SGI", 3) != 0) {
401
402                 /* (Not hubbed), check if not hubless */
403                 if (strncmp(uv_archtype, "NSGI", 4) != 0)
404
405                         /* (Not hubless), not a UV */
406                         return 0;
407
408                 /* Is UV hubless system */
409                 uv_hubless_system = 0x01;
410
411                 /* UV5 Hubless */
412                 if (strncmp(uv_archtype, "NSGI5", 5) == 0)
413                         uv_hubless_system |= 0x20;
414
415                 /* UV4 Hubless: CH */
416                 else if (strncmp(uv_archtype, "NSGI4", 5) == 0)
417                         uv_hubless_system |= 0x10;
418
419                 /* UV3 Hubless: UV300/MC990X w/o hub */
420                 else
421                         uv_hubless_system |= 0x8;
422
423                 /* Copy OEM Table ID */
424                 uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id);
425
426                 pr_info("UV: OEM IDs %s/%s, SystemType %d, HUBLESS ID %x\n",
427                         oem_id, oem_table_id, uv_system_type, uv_hubless_system);
428
429                 return 0;
430         }
431
432         if (numa_off) {
433                 pr_err("UV: NUMA is off, disabling UV support\n");
434                 return 0;
435         }
436
437         /* Set hubbed type if true */
438         uv_hub_info->hub_revision =
439                 !strncmp(uv_archtype, "SGI5", 4) ? UV5_HUB_REVISION_BASE :
440                 !strncmp(uv_archtype, "SGI4", 4) ? UV4_HUB_REVISION_BASE :
441                 !strncmp(uv_archtype, "SGI3", 4) ? UV3_HUB_REVISION_BASE :
442                 !strcmp(uv_archtype, "SGI2") ? UV2_HUB_REVISION_BASE : 0;
443
444         switch (uv_hub_info->hub_revision) {
445         case UV5_HUB_REVISION_BASE:
446                 uv_hubbed_system = 0x21;
447                 uv_hub_type_set(UV5);
448                 break;
449
450         case UV4_HUB_REVISION_BASE:
451                 uv_hubbed_system = 0x11;
452                 uv_hub_type_set(UV4);
453                 break;
454
455         case UV3_HUB_REVISION_BASE:
456                 uv_hubbed_system = 0x9;
457                 uv_hub_type_set(UV3);
458                 break;
459
460         case UV2_HUB_REVISION_BASE:
461                 uv_hubbed_system = 0x5;
462                 uv_hub_type_set(UV2);
463                 break;
464
465         default:
466                 return 0;
467         }
468
469         /* Get UV hub chip part number & revision */
470         early_set_hub_type();
471
472         /* Other UV setup functions */
473         early_set_apic_mode();
474         early_get_pnodeid();
475         early_get_apic_socketid_shift();
476         x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
477         x86_platform.nmi_init = uv_nmi_init;
478         uv_tsc_check_sync();
479
480         return 1;
481 }
482
483 /* Called early to probe for the correct APIC driver */
484 static int __init uv_acpi_madt_oem_check(char *_oem_id, char *_oem_table_id)
485 {
486         /* Set up early hub info fields for Node 0 */
487         uv_cpu_info->p_uv_hub_info = &uv_hub_info_node0;
488
489         /* If not UV, return. */
490         if (uv_set_system_type(_oem_id, _oem_table_id) == 0)
491                 return 0;
492
493         /* Save for display of the OEM Table ID */
494         uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id);
495
496         pr_info("UV: OEM IDs %s/%s, System/UVType %d/0x%x, HUB RevID %d\n",
497                 oem_id, oem_table_id, uv_system_type, is_uv(UV_ANY),
498                 uv_min_hub_revision_id);
499
500         return 0;
501 }
502
503 enum uv_system_type get_uv_system_type(void)
504 {
505         return uv_system_type;
506 }
507
508 int uv_get_hubless_system(void)
509 {
510         return uv_hubless_system;
511 }
512 EXPORT_SYMBOL_GPL(uv_get_hubless_system);
513
514 ssize_t uv_get_archtype(char *buf, int len)
515 {
516         return scnprintf(buf, len, "%s/%s", uv_archtype, oem_table_id);
517 }
518 EXPORT_SYMBOL_GPL(uv_get_archtype);
519
520 int is_uv_system(void)
521 {
522         return uv_system_type != UV_NONE;
523 }
524 EXPORT_SYMBOL_GPL(is_uv_system);
525
526 int is_uv_hubbed(int uvtype)
527 {
528         return (uv_hubbed_system & uvtype);
529 }
530 EXPORT_SYMBOL_GPL(is_uv_hubbed);
531
532 static int is_uv_hubless(int uvtype)
533 {
534         return (uv_hubless_system & uvtype);
535 }
536
537 void **__uv_hub_info_list;
538 EXPORT_SYMBOL_GPL(__uv_hub_info_list);
539
540 DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
541 EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info);
542
543 short uv_possible_blades;
544 EXPORT_SYMBOL_GPL(uv_possible_blades);
545
546 unsigned long sn_rtc_cycles_per_second;
547 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
548
549 /* The following values are used for the per node hub info struct */
550 static __initdata unsigned short                _min_socket, _max_socket;
551 static __initdata unsigned short                _min_pnode, _max_pnode, _gr_table_len;
552 static __initdata struct uv_gam_range_entry     *uv_gre_table;
553 static __initdata struct uv_gam_parameters      *uv_gp_table;
554 static __initdata unsigned short                *_socket_to_node;
555 static __initdata unsigned short                *_socket_to_pnode;
556 static __initdata unsigned short                *_pnode_to_socket;
557 static __initdata unsigned short                *_node_to_socket;
558
559 static __initdata struct uv_gam_range_s         *_gr_table;
560
561 #define SOCK_EMPTY      ((unsigned short)~0)
562
563 /* Default UV memory block size is 2GB */
564 static unsigned long mem_block_size __initdata = (2UL << 30);
565
566 /* Kernel parameter to specify UV mem block size */
567 static int __init parse_mem_block_size(char *ptr)
568 {
569         unsigned long size = memparse(ptr, NULL);
570
571         /* Size will be rounded down by set_block_size() below */
572         mem_block_size = size;
573         return 0;
574 }
575 early_param("uv_memblksize", parse_mem_block_size);
576
577 static __init int adj_blksize(u32 lgre)
578 {
579         unsigned long base = (unsigned long)lgre << UV_GAM_RANGE_SHFT;
580         unsigned long size;
581
582         for (size = mem_block_size; size > MIN_MEMORY_BLOCK_SIZE; size >>= 1)
583                 if (IS_ALIGNED(base, size))
584                         break;
585
586         if (size >= mem_block_size)
587                 return 0;
588
589         mem_block_size = size;
590         return 1;
591 }
592
593 static __init void set_block_size(void)
594 {
595         unsigned int order = ffs(mem_block_size);
596
597         if (order) {
598                 /* adjust for ffs return of 1..64 */
599                 set_memory_block_size_order(order - 1);
600                 pr_info("UV: mem_block_size set to 0x%lx\n", mem_block_size);
601         } else {
602                 /* bad or zero value, default to 1UL << 31 (2GB) */
603                 pr_err("UV: mem_block_size error with 0x%lx\n", mem_block_size);
604                 set_memory_block_size_order(31);
605         }
606 }
607
608 /* Build GAM range lookup table: */
609 static __init void build_uv_gr_table(void)
610 {
611         struct uv_gam_range_entry *gre = uv_gre_table;
612         struct uv_gam_range_s *grt;
613         unsigned long last_limit = 0, ram_limit = 0;
614         int bytes, i, sid, lsid = -1, indx = 0, lindx = -1;
615
616         if (!gre)
617                 return;
618
619         bytes = _gr_table_len * sizeof(struct uv_gam_range_s);
620         grt = kzalloc(bytes, GFP_KERNEL);
621         if (WARN_ON_ONCE(!grt))
622                 return;
623         _gr_table = grt;
624
625         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
626                 if (gre->type == UV_GAM_RANGE_TYPE_HOLE) {
627                         if (!ram_limit) {
628                                 /* Mark hole between RAM/non-RAM: */
629                                 ram_limit = last_limit;
630                                 last_limit = gre->limit;
631                                 lsid++;
632                                 continue;
633                         }
634                         last_limit = gre->limit;
635                         pr_info("UV: extra hole in GAM RE table @%d\n", (int)(gre - uv_gre_table));
636                         continue;
637                 }
638                 if (_max_socket < gre->sockid) {
639                         pr_err("UV: GAM table sockid(%d) too large(>%d) @%d\n", gre->sockid, _max_socket, (int)(gre - uv_gre_table));
640                         continue;
641                 }
642                 sid = gre->sockid - _min_socket;
643                 if (lsid < sid) {
644                         /* New range: */
645                         grt = &_gr_table[indx];
646                         grt->base = lindx;
647                         grt->nasid = gre->nasid;
648                         grt->limit = last_limit = gre->limit;
649                         lsid = sid;
650                         lindx = indx++;
651                         continue;
652                 }
653                 /* Update range: */
654                 if (lsid == sid && !ram_limit) {
655                         /* .. if contiguous: */
656                         if (grt->limit == last_limit) {
657                                 grt->limit = last_limit = gre->limit;
658                                 continue;
659                         }
660                 }
661                 /* Non-contiguous RAM range: */
662                 if (!ram_limit) {
663                         grt++;
664                         grt->base = lindx;
665                         grt->nasid = gre->nasid;
666                         grt->limit = last_limit = gre->limit;
667                         continue;
668                 }
669                 /* Non-contiguous/non-RAM: */
670                 grt++;
671                 /* base is this entry */
672                 grt->base = grt - _gr_table;
673                 grt->nasid = gre->nasid;
674                 grt->limit = last_limit = gre->limit;
675                 lsid++;
676         }
677
678         /* Shorten table if possible */
679         grt++;
680         i = grt - _gr_table;
681         if (i < _gr_table_len) {
682                 void *ret;
683
684                 bytes = i * sizeof(struct uv_gam_range_s);
685                 ret = krealloc(_gr_table, bytes, GFP_KERNEL);
686                 if (ret) {
687                         _gr_table = ret;
688                         _gr_table_len = i;
689                 }
690         }
691
692         /* Display resultant GAM range table: */
693         for (i = 0, grt = _gr_table; i < _gr_table_len; i++, grt++) {
694                 unsigned long start, end;
695                 int gb = grt->base;
696
697                 start = gb < 0 ?  0 : (unsigned long)_gr_table[gb].limit << UV_GAM_RANGE_SHFT;
698                 end = (unsigned long)grt->limit << UV_GAM_RANGE_SHFT;
699
700                 pr_info("UV: GAM Range %2d %04x 0x%013lx-0x%013lx (%d)\n", i, grt->nasid, start, end, gb);
701         }
702 }
703
704 static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
705 {
706         unsigned long val;
707         int pnode;
708
709         pnode = uv_apicid_to_pnode(phys_apicid);
710
711         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
712             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
713             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
714             APIC_DM_INIT;
715
716         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
717
718         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
719             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
720             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
721             APIC_DM_STARTUP;
722
723         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
724
725         return 0;
726 }
727
728 static void uv_send_IPI_one(int cpu, int vector)
729 {
730         unsigned long apicid = per_cpu(x86_cpu_to_apicid, cpu);
731         int pnode = uv_apicid_to_pnode(apicid);
732         unsigned long dmode, val;
733
734         if (vector == NMI_VECTOR)
735                 dmode = APIC_DELIVERY_MODE_NMI;
736         else
737                 dmode = APIC_DELIVERY_MODE_FIXED;
738
739         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
740                 (apicid << UVH_IPI_INT_APIC_ID_SHFT) |
741                 (dmode << UVH_IPI_INT_DELIVERY_MODE_SHFT) |
742                 (vector << UVH_IPI_INT_VECTOR_SHFT);
743
744         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
745 }
746
747 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
748 {
749         unsigned int cpu;
750
751         for_each_cpu(cpu, mask)
752                 uv_send_IPI_one(cpu, vector);
753 }
754
755 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
756 {
757         unsigned int this_cpu = smp_processor_id();
758         unsigned int cpu;
759
760         for_each_cpu(cpu, mask) {
761                 if (cpu != this_cpu)
762                         uv_send_IPI_one(cpu, vector);
763         }
764 }
765
766 static void uv_send_IPI_allbutself(int vector)
767 {
768         unsigned int this_cpu = smp_processor_id();
769         unsigned int cpu;
770
771         for_each_online_cpu(cpu) {
772                 if (cpu != this_cpu)
773                         uv_send_IPI_one(cpu, vector);
774         }
775 }
776
777 static void uv_send_IPI_all(int vector)
778 {
779         uv_send_IPI_mask(cpu_online_mask, vector);
780 }
781
782 static u32 set_apic_id(unsigned int id)
783 {
784         return id;
785 }
786
787 static unsigned int uv_read_apic_id(void)
788 {
789         return x2apic_get_apic_id(apic_read(APIC_ID));
790 }
791
792 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
793 {
794         return uv_read_apic_id() >> index_msb;
795 }
796
797 static int uv_probe(void)
798 {
799         return apic == &apic_x2apic_uv_x;
800 }
801
802 static struct apic apic_x2apic_uv_x __ro_after_init = {
803
804         .name                           = "UV large system",
805         .probe                          = uv_probe,
806         .acpi_madt_oem_check            = uv_acpi_madt_oem_check,
807
808         .delivery_mode                  = APIC_DELIVERY_MODE_FIXED,
809         .dest_mode_logical              = false,
810
811         .disable_esr                    = 0,
812
813         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
814         .phys_pkg_id                    = uv_phys_pkg_id,
815
816         .max_apic_id                    = UINT_MAX,
817         .get_apic_id                    = x2apic_get_apic_id,
818         .set_apic_id                    = set_apic_id,
819
820         .calc_dest_apicid               = apic_default_calc_apicid,
821
822         .send_IPI                       = uv_send_IPI_one,
823         .send_IPI_mask                  = uv_send_IPI_mask,
824         .send_IPI_mask_allbutself       = uv_send_IPI_mask_allbutself,
825         .send_IPI_allbutself            = uv_send_IPI_allbutself,
826         .send_IPI_all                   = uv_send_IPI_all,
827         .send_IPI_self                  = x2apic_send_IPI_self,
828
829         .wakeup_secondary_cpu           = uv_wakeup_secondary,
830
831         .read                           = native_apic_msr_read,
832         .write                          = native_apic_msr_write,
833         .eoi                            = native_apic_msr_eoi,
834         .icr_read                       = native_x2apic_icr_read,
835         .icr_write                      = native_x2apic_icr_write,
836 };
837
838 #define UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH      3
839 #define DEST_SHIFT UVXH_RH_GAM_ALIAS_0_REDIRECT_CONFIG_DEST_BASE_SHFT
840
841 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
842 {
843         union uvh_rh_gam_alias_2_overlay_config_u alias;
844         union uvh_rh_gam_alias_2_redirect_config_u redirect;
845         unsigned long m_redirect;
846         unsigned long m_overlay;
847         int i;
848
849         for (i = 0; i < UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH; i++) {
850                 switch (i) {
851                 case 0:
852                         m_redirect = UVH_RH_GAM_ALIAS_0_REDIRECT_CONFIG;
853                         m_overlay  = UVH_RH_GAM_ALIAS_0_OVERLAY_CONFIG;
854                         break;
855                 case 1:
856                         m_redirect = UVH_RH_GAM_ALIAS_1_REDIRECT_CONFIG;
857                         m_overlay  = UVH_RH_GAM_ALIAS_1_OVERLAY_CONFIG;
858                         break;
859                 case 2:
860                         m_redirect = UVH_RH_GAM_ALIAS_2_REDIRECT_CONFIG;
861                         m_overlay  = UVH_RH_GAM_ALIAS_2_OVERLAY_CONFIG;
862                         break;
863                 }
864                 alias.v = uv_read_local_mmr(m_overlay);
865                 if (alias.s.enable && alias.s.base == 0) {
866                         *size = (1UL << alias.s.m_alias);
867                         redirect.v = uv_read_local_mmr(m_redirect);
868                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
869                         return;
870                 }
871         }
872         *base = *size = 0;
873 }
874
875 enum map_type {map_wb, map_uc};
876 static const char * const mt[] = { "WB", "UC" };
877
878 static __init void map_high(char *id, unsigned long base, int pshift, int bshift, int max_pnode, enum map_type map_type)
879 {
880         unsigned long bytes, paddr;
881
882         paddr = base << pshift;
883         bytes = (1UL << bshift) * (max_pnode + 1);
884         if (!paddr) {
885                 pr_info("UV: Map %s_HI base address NULL\n", id);
886                 return;
887         }
888         if (map_type == map_uc)
889                 init_extra_mapping_uc(paddr, bytes);
890         else
891                 init_extra_mapping_wb(paddr, bytes);
892
893         pr_info("UV: Map %s_HI 0x%lx - 0x%lx %s (%d segments)\n",
894                 id, paddr, paddr + bytes, mt[map_type], max_pnode + 1);
895 }
896
897 static __init void map_gru_high(int max_pnode)
898 {
899         union uvh_rh_gam_gru_overlay_config_u gru;
900         unsigned long mask, base;
901         int shift;
902
903         if (UVH_RH_GAM_GRU_OVERLAY_CONFIG) {
904                 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG);
905                 shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
906                 mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
907         } else if (UVH_RH10_GAM_GRU_OVERLAY_CONFIG) {
908                 gru.v = uv_read_local_mmr(UVH_RH10_GAM_GRU_OVERLAY_CONFIG);
909                 shift = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
910                 mask = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
911         } else {
912                 pr_err("UV: GRU unavailable (no MMR)\n");
913                 return;
914         }
915
916         if (!gru.s.enable) {
917                 pr_info("UV: GRU disabled (by BIOS)\n");
918                 return;
919         }
920
921         base = (gru.v & mask) >> shift;
922         map_high("GRU", base, shift, shift, max_pnode, map_wb);
923         gru_start_paddr = ((u64)base << shift);
924         gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
925 }
926
927 static __init void map_mmr_high(int max_pnode)
928 {
929         unsigned long base;
930         int shift;
931         bool enable;
932
933         if (UVH_RH10_GAM_MMR_OVERLAY_CONFIG) {
934                 union uvh_rh10_gam_mmr_overlay_config_u mmr;
935
936                 mmr.v = uv_read_local_mmr(UVH_RH10_GAM_MMR_OVERLAY_CONFIG);
937                 enable = mmr.s.enable;
938                 base = mmr.s.base;
939                 shift = UVH_RH10_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
940         } else if (UVH_RH_GAM_MMR_OVERLAY_CONFIG) {
941                 union uvh_rh_gam_mmr_overlay_config_u mmr;
942
943                 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG);
944                 enable = mmr.s.enable;
945                 base = mmr.s.base;
946                 shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
947         } else {
948                 pr_err("UV:%s:RH_GAM_MMR_OVERLAY_CONFIG MMR undefined?\n",
949                         __func__);
950                 return;
951         }
952
953         if (enable)
954                 map_high("MMR", base, shift, shift, max_pnode, map_uc);
955         else
956                 pr_info("UV: MMR disabled\n");
957 }
958
959 /* Arch specific ENUM cases */
960 enum mmioh_arch {
961         UV2_MMIOH = -1,
962         UVY_MMIOH0, UVY_MMIOH1,
963         UVX_MMIOH0, UVX_MMIOH1,
964 };
965
966 /* Calculate and Map MMIOH Regions */
967 static void __init calc_mmioh_map(enum mmioh_arch index,
968         int min_pnode, int max_pnode,
969         int shift, unsigned long base, int m_io, int n_io)
970 {
971         unsigned long mmr, nasid_mask;
972         int nasid, min_nasid, max_nasid, lnasid, mapped;
973         int i, fi, li, n, max_io;
974         char id[8];
975
976         /* One (UV2) mapping */
977         if (index == UV2_MMIOH) {
978                 strscpy(id, "MMIOH", sizeof(id));
979                 max_io = max_pnode;
980                 mapped = 0;
981                 goto map_exit;
982         }
983
984         /* small and large MMIOH mappings */
985         switch (index) {
986         case UVY_MMIOH0:
987                 mmr = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG0;
988                 nasid_mask = UVYH_RH10_GAM_MMIOH_REDIRECT_CONFIG0_NASID_MASK;
989                 n = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG0_DEPTH;
990                 min_nasid = min_pnode;
991                 max_nasid = max_pnode;
992                 mapped = 1;
993                 break;
994         case UVY_MMIOH1:
995                 mmr = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG1;
996                 nasid_mask = UVYH_RH10_GAM_MMIOH_REDIRECT_CONFIG1_NASID_MASK;
997                 n = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG1_DEPTH;
998                 min_nasid = min_pnode;
999                 max_nasid = max_pnode;
1000                 mapped = 1;
1001                 break;
1002         case UVX_MMIOH0:
1003                 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0;
1004                 nasid_mask = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_NASID_MASK;
1005                 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_DEPTH;
1006                 min_nasid = min_pnode * 2;
1007                 max_nasid = max_pnode * 2;
1008                 mapped = 1;
1009                 break;
1010         case UVX_MMIOH1:
1011                 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1;
1012                 nasid_mask = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_NASID_MASK;
1013                 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_DEPTH;
1014                 min_nasid = min_pnode * 2;
1015                 max_nasid = max_pnode * 2;
1016                 mapped = 1;
1017                 break;
1018         default:
1019                 pr_err("UV:%s:Invalid mapping type:%d\n", __func__, index);
1020                 return;
1021         }
1022
1023         /* enum values chosen so (index mod 2) is MMIOH 0/1 (low/high) */
1024         snprintf(id, sizeof(id), "MMIOH%d", index%2);
1025
1026         max_io = lnasid = fi = li = -1;
1027         for (i = 0; i < n; i++) {
1028                 unsigned long m_redirect = mmr + i * 8;
1029                 unsigned long redirect = uv_read_local_mmr(m_redirect);
1030
1031                 nasid = redirect & nasid_mask;
1032                 if (i == 0)
1033                         pr_info("UV: %s redirect base 0x%lx(@0x%lx) 0x%04x\n",
1034                                 id, redirect, m_redirect, nasid);
1035
1036                 /* Invalid NASID check */
1037                 if (nasid < min_nasid || max_nasid < nasid) {
1038                         /* Not an error: unused table entries get "poison" values */
1039                         pr_debug("UV:%s:Invalid NASID(%x):%x (range:%x..%x)\n",
1040                                __func__, index, nasid, min_nasid, max_nasid);
1041                         nasid = -1;
1042                 }
1043
1044                 if (nasid == lnasid) {
1045                         li = i;
1046                         /* Last entry check: */
1047                         if (i != n-1)
1048                                 continue;
1049                 }
1050
1051                 /* Check if we have a cached (or last) redirect to print: */
1052                 if (lnasid != -1 || (i == n-1 && nasid != -1))  {
1053                         unsigned long addr1, addr2;
1054                         int f, l;
1055
1056                         if (lnasid == -1) {
1057                                 f = l = i;
1058                                 lnasid = nasid;
1059                         } else {
1060                                 f = fi;
1061                                 l = li;
1062                         }
1063                         addr1 = (base << shift) + f * (1ULL << m_io);
1064                         addr2 = (base << shift) + (l + 1) * (1ULL << m_io);
1065                         pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n",
1066                                 id, fi, li, lnasid, addr1, addr2);
1067                         if (max_io < l)
1068                                 max_io = l;
1069                 }
1070                 fi = li = i;
1071                 lnasid = nasid;
1072         }
1073
1074 map_exit:
1075         pr_info("UV: %s base:0x%lx shift:%d m_io:%d max_io:%d max_pnode:0x%x\n",
1076                 id, base, shift, m_io, max_io, max_pnode);
1077
1078         if (max_io >= 0 && !mapped)
1079                 map_high(id, base, shift, m_io, max_io, map_uc);
1080 }
1081
1082 static __init void map_mmioh_high(int min_pnode, int max_pnode)
1083 {
1084         /* UVY flavor */
1085         if (UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0) {
1086                 union uvh_rh10_gam_mmioh_overlay_config0_u mmioh0;
1087                 union uvh_rh10_gam_mmioh_overlay_config1_u mmioh1;
1088
1089                 mmioh0.v = uv_read_local_mmr(UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0);
1090                 if (unlikely(mmioh0.s.enable == 0))
1091                         pr_info("UV: MMIOH0 disabled\n");
1092                 else
1093                         calc_mmioh_map(UVY_MMIOH0, min_pnode, max_pnode,
1094                                 UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0_BASE_SHFT,
1095                                 mmioh0.s.base, mmioh0.s.m_io, mmioh0.s.n_io);
1096
1097                 mmioh1.v = uv_read_local_mmr(UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1);
1098                 if (unlikely(mmioh1.s.enable == 0))
1099                         pr_info("UV: MMIOH1 disabled\n");
1100                 else
1101                         calc_mmioh_map(UVY_MMIOH1, min_pnode, max_pnode,
1102                                 UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1_BASE_SHFT,
1103                                 mmioh1.s.base, mmioh1.s.m_io, mmioh1.s.n_io);
1104                 return;
1105         }
1106         /* UVX flavor */
1107         if (UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0) {
1108                 union uvh_rh_gam_mmioh_overlay_config0_u mmioh0;
1109                 union uvh_rh_gam_mmioh_overlay_config1_u mmioh1;
1110
1111                 mmioh0.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0);
1112                 if (unlikely(mmioh0.s.enable == 0))
1113                         pr_info("UV: MMIOH0 disabled\n");
1114                 else {
1115                         unsigned long base = uvxy_field(mmioh0, base, 0);
1116                         int m_io = uvxy_field(mmioh0, m_io, 0);
1117                         int n_io = uvxy_field(mmioh0, n_io, 0);
1118
1119                         calc_mmioh_map(UVX_MMIOH0, min_pnode, max_pnode,
1120                                 UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_BASE_SHFT,
1121                                 base, m_io, n_io);
1122                 }
1123
1124                 mmioh1.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1);
1125                 if (unlikely(mmioh1.s.enable == 0))
1126                         pr_info("UV: MMIOH1 disabled\n");
1127                 else {
1128                         unsigned long base = uvxy_field(mmioh1, base, 0);
1129                         int m_io = uvxy_field(mmioh1, m_io, 0);
1130                         int n_io = uvxy_field(mmioh1, n_io, 0);
1131
1132                         calc_mmioh_map(UVX_MMIOH1, min_pnode, max_pnode,
1133                                 UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_BASE_SHFT,
1134                                 base, m_io, n_io);
1135                 }
1136                 return;
1137         }
1138
1139         /* UV2 flavor */
1140         if (UVH_RH_GAM_MMIOH_OVERLAY_CONFIG) {
1141                 union uvh_rh_gam_mmioh_overlay_config_u mmioh;
1142
1143                 mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG);
1144                 if (unlikely(mmioh.s2.enable == 0))
1145                         pr_info("UV: MMIOH disabled\n");
1146                 else
1147                         calc_mmioh_map(UV2_MMIOH, min_pnode, max_pnode,
1148                                 UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_BASE_SHFT,
1149                                 mmioh.s2.base, mmioh.s2.m_io, mmioh.s2.n_io);
1150                 return;
1151         }
1152 }
1153
1154 static __init void map_low_mmrs(void)
1155 {
1156         if (UV_GLOBAL_MMR32_BASE)
1157                 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
1158
1159         if (UV_LOCAL_MMR_BASE)
1160                 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
1161 }
1162
1163 static __init void uv_rtc_init(void)
1164 {
1165         long status;
1166         u64 ticks_per_sec;
1167
1168         status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec);
1169
1170         if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
1171                 pr_warn("UV: unable to determine platform RTC clock frequency, guessing.\n");
1172
1173                 /* BIOS gives wrong value for clock frequency, so guess: */
1174                 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
1175         } else {
1176                 sn_rtc_cycles_per_second = ticks_per_sec;
1177         }
1178 }
1179
1180 /* Direct Legacy VGA I/O traffic to designated IOH */
1181 static int uv_set_vga_state(struct pci_dev *pdev, bool decode, unsigned int command_bits, u32 flags)
1182 {
1183         int domain, bus, rc;
1184
1185         if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
1186                 return 0;
1187
1188         if ((command_bits & PCI_COMMAND_IO) == 0)
1189                 return 0;
1190
1191         domain = pci_domain_nr(pdev->bus);
1192         bus = pdev->bus->number;
1193
1194         rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
1195
1196         return rc;
1197 }
1198
1199 /*
1200  * Called on each CPU to initialize the per_cpu UV data area.
1201  * FIXME: hotplug not supported yet
1202  */
1203 void uv_cpu_init(void)
1204 {
1205         /* CPU 0 initialization will be done via uv_system_init. */
1206         if (smp_processor_id() == 0)
1207                 return;
1208
1209         uv_hub_info->nr_online_cpus++;
1210 }
1211
1212 struct mn {
1213         unsigned char   m_val;
1214         unsigned char   n_val;
1215         unsigned char   m_shift;
1216         unsigned char   n_lshift;
1217 };
1218
1219 /* Initialize caller's MN struct and fill in values */
1220 static void get_mn(struct mn *mnp)
1221 {
1222         memset(mnp, 0, sizeof(*mnp));
1223         mnp->n_val      = uv_cpuid.n_skt;
1224         if (is_uv(UV4|UVY)) {
1225                 mnp->m_val      = 0;
1226                 mnp->n_lshift   = 0;
1227         } else if (is_uv3_hub()) {
1228                 union uvyh_gr0_gam_gr_config_u m_gr_config;
1229
1230                 mnp->m_val      = uv_cpuid.m_skt;
1231                 m_gr_config.v   = uv_read_local_mmr(UVH_GR0_GAM_GR_CONFIG);
1232                 mnp->n_lshift   = m_gr_config.s3.m_skt;
1233         } else if (is_uv2_hub()) {
1234                 mnp->m_val      = uv_cpuid.m_skt;
1235                 mnp->n_lshift   = mnp->m_val == 40 ? 40 : 39;
1236         }
1237         mnp->m_shift = mnp->m_val ? 64 - mnp->m_val : 0;
1238 }
1239
1240 static void __init uv_init_hub_info(struct uv_hub_info_s *hi)
1241 {
1242         struct mn mn;
1243
1244         get_mn(&mn);
1245         hi->gpa_mask = mn.m_val ?
1246                 (1UL << (mn.m_val + mn.n_val)) - 1 :
1247                 (1UL << uv_cpuid.gpa_shift) - 1;
1248
1249         hi->m_val               = mn.m_val;
1250         hi->n_val               = mn.n_val;
1251         hi->m_shift             = mn.m_shift;
1252         hi->n_lshift            = mn.n_lshift ? mn.n_lshift : 0;
1253         hi->hub_revision        = uv_hub_info->hub_revision;
1254         hi->hub_type            = uv_hub_info->hub_type;
1255         hi->pnode_mask          = uv_cpuid.pnode_mask;
1256         hi->nasid_shift         = uv_cpuid.nasid_shift;
1257         hi->min_pnode           = _min_pnode;
1258         hi->min_socket          = _min_socket;
1259         hi->node_to_socket      = _node_to_socket;
1260         hi->pnode_to_socket     = _pnode_to_socket;
1261         hi->socket_to_node      = _socket_to_node;
1262         hi->socket_to_pnode     = _socket_to_pnode;
1263         hi->gr_table_len        = _gr_table_len;
1264         hi->gr_table            = _gr_table;
1265
1266         uv_cpuid.gnode_shift    = max_t(unsigned int, uv_cpuid.gnode_shift, mn.n_val);
1267         hi->gnode_extra         = (uv_node_id & ~((1 << uv_cpuid.gnode_shift) - 1)) >> 1;
1268         if (mn.m_val)
1269                 hi->gnode_upper = (u64)hi->gnode_extra << mn.m_val;
1270
1271         if (uv_gp_table) {
1272                 hi->global_mmr_base     = uv_gp_table->mmr_base;
1273                 hi->global_mmr_shift    = uv_gp_table->mmr_shift;
1274                 hi->global_gru_base     = uv_gp_table->gru_base;
1275                 hi->global_gru_shift    = uv_gp_table->gru_shift;
1276                 hi->gpa_shift           = uv_gp_table->gpa_shift;
1277                 hi->gpa_mask            = (1UL << hi->gpa_shift) - 1;
1278         } else {
1279                 hi->global_mmr_base     =
1280                         uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG) &
1281                         ~UV_MMR_ENABLE;
1282                 hi->global_mmr_shift    = _UV_GLOBAL_MMR64_PNODE_SHIFT;
1283         }
1284
1285         get_lowmem_redirect(&hi->lowmem_remap_base, &hi->lowmem_remap_top);
1286
1287         hi->apic_pnode_shift = uv_cpuid.socketid_shift;
1288
1289         /* Show system specific info: */
1290         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);
1291         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);
1292         pr_info("UV: mmr_base/shift:0x%lx/%ld\n", hi->global_mmr_base, hi->global_mmr_shift);
1293         if (hi->global_gru_base)
1294                 pr_info("UV: gru_base/shift:0x%lx/%ld\n",
1295                         hi->global_gru_base, hi->global_gru_shift);
1296
1297         pr_info("UV: gnode_upper:0x%lx gnode_extra:0x%x\n", hi->gnode_upper, hi->gnode_extra);
1298 }
1299
1300 static void __init decode_gam_params(unsigned long ptr)
1301 {
1302         uv_gp_table = (struct uv_gam_parameters *)ptr;
1303
1304         pr_info("UV: GAM Params...\n");
1305         pr_info("UV: mmr_base/shift:0x%llx/%d gru_base/shift:0x%llx/%d gpa_shift:%d\n",
1306                 uv_gp_table->mmr_base, uv_gp_table->mmr_shift,
1307                 uv_gp_table->gru_base, uv_gp_table->gru_shift,
1308                 uv_gp_table->gpa_shift);
1309 }
1310
1311 static void __init decode_gam_rng_tbl(unsigned long ptr)
1312 {
1313         struct uv_gam_range_entry *gre = (struct uv_gam_range_entry *)ptr;
1314         unsigned long lgre = 0, gend = 0;
1315         int index = 0;
1316         int sock_min = INT_MAX, pnode_min = INT_MAX;
1317         int sock_max = -1, pnode_max = -1;
1318
1319         uv_gre_table = gre;
1320         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1321                 unsigned long size = ((unsigned long)(gre->limit - lgre)
1322                                         << UV_GAM_RANGE_SHFT);
1323                 int order = 0;
1324                 char suffix[] = " KMGTPE";
1325                 int flag = ' ';
1326
1327                 while (size > 9999 && order < sizeof(suffix)) {
1328                         size /= 1024;
1329                         order++;
1330                 }
1331
1332                 /* adjust max block size to current range start */
1333                 if (gre->type == 1 || gre->type == 2)
1334                         if (adj_blksize(lgre))
1335                                 flag = '*';
1336
1337                 if (!index) {
1338                         pr_info("UV: GAM Range Table...\n");
1339                         pr_info("UV:  # %20s %14s %6s %4s %5s %3s %2s\n", "Range", "", "Size", "Type", "NASID", "SID", "PN");
1340                 }
1341                 pr_info("UV: %2d: 0x%014lx-0x%014lx%c %5lu%c %3d   %04x  %02x %02x\n",
1342                         index++,
1343                         (unsigned long)lgre << UV_GAM_RANGE_SHFT,
1344                         (unsigned long)gre->limit << UV_GAM_RANGE_SHFT,
1345                         flag, size, suffix[order],
1346                         gre->type, gre->nasid, gre->sockid, gre->pnode);
1347
1348                 if (gre->type == UV_GAM_RANGE_TYPE_HOLE)
1349                         gend = (unsigned long)gre->limit << UV_GAM_RANGE_SHFT;
1350
1351                 /* update to next range start */
1352                 lgre = gre->limit;
1353                 if (sock_min > gre->sockid)
1354                         sock_min = gre->sockid;
1355                 if (sock_max < gre->sockid)
1356                         sock_max = gre->sockid;
1357                 if (pnode_min > gre->pnode)
1358                         pnode_min = gre->pnode;
1359                 if (pnode_max < gre->pnode)
1360                         pnode_max = gre->pnode;
1361         }
1362         _min_socket     = sock_min;
1363         _max_socket     = sock_max;
1364         _min_pnode      = pnode_min;
1365         _max_pnode      = pnode_max;
1366         _gr_table_len   = index;
1367
1368         pr_info("UV: GRT: %d entries, sockets(min:%x,max:%x), pnodes(min:%x,max:%x), gap_end(%d)\n",
1369           index, _min_socket, _max_socket, _min_pnode, _max_pnode, fls64(gend));
1370 }
1371
1372 /* Walk through UVsystab decoding the fields */
1373 static int __init decode_uv_systab(void)
1374 {
1375         struct uv_systab *st;
1376         int i;
1377
1378         /* Get mapped UVsystab pointer */
1379         st = uv_systab;
1380
1381         /* If UVsystab is version 1, there is no extended UVsystab */
1382         if (st && st->revision == UV_SYSTAB_VERSION_1)
1383                 return 0;
1384
1385         if ((!st) || (st->revision < UV_SYSTAB_VERSION_UV4_LATEST)) {
1386                 int rev = st ? st->revision : 0;
1387
1388                 pr_err("UV: BIOS UVsystab mismatch, (%x < %x)\n",
1389                         rev, UV_SYSTAB_VERSION_UV4_LATEST);
1390                 pr_err("UV: Does not support UV, switch to non-UV x86_64\n");
1391                 uv_system_type = UV_NONE;
1392
1393                 return -EINVAL;
1394         }
1395
1396         for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
1397                 unsigned long ptr = st->entry[i].offset;
1398
1399                 if (!ptr)
1400                         continue;
1401
1402                 /* point to payload */
1403                 ptr += (unsigned long)st;
1404
1405                 switch (st->entry[i].type) {
1406                 case UV_SYSTAB_TYPE_GAM_PARAMS:
1407                         decode_gam_params(ptr);
1408                         break;
1409
1410                 case UV_SYSTAB_TYPE_GAM_RNG_TBL:
1411                         decode_gam_rng_tbl(ptr);
1412                         break;
1413
1414                 case UV_SYSTAB_TYPE_ARCH_TYPE:
1415                         /* already processed in early startup */
1416                         break;
1417
1418                 default:
1419                         pr_err("UV:%s:Unrecognized UV_SYSTAB_TYPE:%d, skipped\n",
1420                                 __func__, st->entry[i].type);
1421                         break;
1422                 }
1423         }
1424         return 0;
1425 }
1426
1427 /*
1428  * Given a bitmask 'bits' representing presnt blades, numbered
1429  * starting at 'base', masking off unused high bits of blade number
1430  * with 'mask', update the minimum and maximum blade numbers that we
1431  * have found.  (Masking with 'mask' necessary because of BIOS
1432  * treatment of system partitioning when creating this table we are
1433  * interpreting.)
1434  */
1435 static inline void blade_update_min_max(unsigned long bits, int base, int mask, int *min, int *max)
1436 {
1437         int first, last;
1438
1439         if (!bits)
1440                 return;
1441         first = (base + __ffs(bits)) & mask;
1442         last =  (base + __fls(bits)) & mask;
1443
1444         if (*min > first)
1445                 *min = first;
1446         if (*max < last)
1447                 *max = last;
1448 }
1449
1450 /* Set up physical blade translations from UVH_NODE_PRESENT_TABLE */
1451 static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
1452 {
1453         unsigned long np;
1454         int i, uv_pb = 0;
1455         int sock_min = INT_MAX, sock_max = -1, s_mask;
1456
1457         s_mask = (1 << uv_cpuid.n_skt) - 1;
1458
1459         if (UVH_NODE_PRESENT_TABLE) {
1460                 pr_info("UV: NODE_PRESENT_DEPTH = %d\n",
1461                         UVH_NODE_PRESENT_TABLE_DEPTH);
1462                 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
1463                         np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
1464                         pr_info("UV: NODE_PRESENT(%d) = 0x%016lx\n", i, np);
1465                         blade_update_min_max(np, i * 64, s_mask, &sock_min, &sock_max);
1466                 }
1467         }
1468         if (UVH_NODE_PRESENT_0) {
1469                 np = uv_read_local_mmr(UVH_NODE_PRESENT_0);
1470                 pr_info("UV: NODE_PRESENT_0 = 0x%016lx\n", np);
1471                 blade_update_min_max(np, 0, s_mask, &sock_min, &sock_max);
1472         }
1473         if (UVH_NODE_PRESENT_1) {
1474                 np = uv_read_local_mmr(UVH_NODE_PRESENT_1);
1475                 pr_info("UV: NODE_PRESENT_1 = 0x%016lx\n", np);
1476                 blade_update_min_max(np, 64, s_mask, &sock_min, &sock_max);
1477         }
1478
1479         /* Only update if we actually found some bits indicating blades present */
1480         if (sock_max >= sock_min) {
1481                 _min_socket = sock_min;
1482                 _max_socket = sock_max;
1483                 uv_pb = sock_max - sock_min + 1;
1484         }
1485         if (uv_possible_blades != uv_pb)
1486                 uv_possible_blades = uv_pb;
1487
1488         pr_info("UV: number nodes/possible blades %d (%d - %d)\n",
1489                 uv_pb, sock_min, sock_max);
1490 }
1491
1492 static int __init alloc_conv_table(int num_elem, unsigned short **table)
1493 {
1494         int i;
1495         size_t bytes;
1496
1497         bytes = num_elem * sizeof(*table[0]);
1498         *table = kmalloc(bytes, GFP_KERNEL);
1499         if (WARN_ON_ONCE(!*table))
1500                 return -ENOMEM;
1501         for (i = 0; i < num_elem; i++)
1502                 ((unsigned short *)*table)[i] = SOCK_EMPTY;
1503         return 0;
1504 }
1505
1506 /* Remove conversion table if it's 1:1 */
1507 #define FREE_1_TO_1_TABLE(tbl, min, max, max2) free_1_to_1_table(&tbl, #tbl, min, max, max2)
1508
1509 static void __init free_1_to_1_table(unsigned short **tp, char *tname, int min, int max, int max2)
1510 {
1511         int i;
1512         unsigned short *table = *tp;
1513
1514         if (table == NULL)
1515                 return;
1516         if (max != max2)
1517                 return;
1518         for (i = 0; i < max; i++) {
1519                 if (i != table[i])
1520                         return;
1521         }
1522         kfree(table);
1523         *tp = NULL;
1524         pr_info("UV: %s is 1:1, conversion table removed\n", tname);
1525 }
1526
1527 /*
1528  * Build Socket Tables
1529  * If the number of nodes is >1 per socket, socket to node table will
1530  * contain lowest node number on that socket.
1531  */
1532 static void __init build_socket_tables(void)
1533 {
1534         struct uv_gam_range_entry *gre = uv_gre_table;
1535         int nums, numn, nump;
1536         int i, lnid, apicid;
1537         int minsock = _min_socket;
1538         int maxsock = _max_socket;
1539         int minpnode = _min_pnode;
1540         int maxpnode = _max_pnode;
1541
1542         if (!gre) {
1543                 if (is_uv2_hub() || is_uv3_hub()) {
1544                         pr_info("UV: No UVsystab socket table, ignoring\n");
1545                         return;
1546                 }
1547                 pr_err("UV: Error: UVsystab address translations not available!\n");
1548                 WARN_ON_ONCE(!gre);
1549                 return;
1550         }
1551
1552         numn = num_possible_nodes();
1553         nump = maxpnode - minpnode + 1;
1554         nums = maxsock - minsock + 1;
1555
1556         /* Allocate and clear tables */
1557         if ((alloc_conv_table(nump, &_pnode_to_socket) < 0)
1558             || (alloc_conv_table(nums, &_socket_to_pnode) < 0)
1559             || (alloc_conv_table(numn, &_node_to_socket) < 0)
1560             || (alloc_conv_table(nums, &_socket_to_node) < 0)) {
1561                 kfree(_pnode_to_socket);
1562                 kfree(_socket_to_pnode);
1563                 kfree(_node_to_socket);
1564                 return;
1565         }
1566
1567         /* Fill in pnode/node/addr conversion list values: */
1568         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1569                 if (gre->type == UV_GAM_RANGE_TYPE_HOLE)
1570                         continue;
1571                 i = gre->sockid - minsock;
1572                 if (_socket_to_pnode[i] == SOCK_EMPTY)
1573                         _socket_to_pnode[i] = gre->pnode;
1574
1575                 i = gre->pnode - minpnode;
1576                 if (_pnode_to_socket[i] == SOCK_EMPTY)
1577                         _pnode_to_socket[i] = gre->sockid;
1578
1579                 pr_info("UV: sid:%02x type:%d nasid:%04x pn:%02x pn2s:%2x\n",
1580                         gre->sockid, gre->type, gre->nasid,
1581                         _socket_to_pnode[gre->sockid - minsock],
1582                         _pnode_to_socket[gre->pnode - minpnode]);
1583         }
1584
1585         /* Set socket -> node values: */
1586         lnid = NUMA_NO_NODE;
1587         for (apicid = 0; apicid < ARRAY_SIZE(__apicid_to_node); apicid++) {
1588                 int nid = __apicid_to_node[apicid];
1589                 int sockid;
1590
1591                 if ((nid == NUMA_NO_NODE) || (lnid == nid))
1592                         continue;
1593                 lnid = nid;
1594
1595                 sockid = apicid >> uv_cpuid.socketid_shift;
1596
1597                 if (_socket_to_node[sockid - minsock] == SOCK_EMPTY)
1598                         _socket_to_node[sockid - minsock] = nid;
1599
1600                 if (_node_to_socket[nid] == SOCK_EMPTY)
1601                         _node_to_socket[nid] = sockid;
1602
1603                 pr_info("UV: sid:%02x: apicid:%04x socket:%02d node:%03x s2n:%03x\n",
1604                         sockid,
1605                         apicid,
1606                         _node_to_socket[nid],
1607                         nid,
1608                         _socket_to_node[sockid - minsock]);
1609         }
1610
1611         /*
1612          * If e.g. socket id == pnode for all pnodes,
1613          *   system runs faster by removing corresponding conversion table.
1614          */
1615         FREE_1_TO_1_TABLE(_socket_to_node, _min_socket, nums, numn);
1616         FREE_1_TO_1_TABLE(_node_to_socket, _min_socket, nums, numn);
1617         FREE_1_TO_1_TABLE(_socket_to_pnode, _min_pnode, nums, nump);
1618         FREE_1_TO_1_TABLE(_pnode_to_socket, _min_pnode, nums, nump);
1619 }
1620
1621 /* Check which reboot to use */
1622 static void check_efi_reboot(void)
1623 {
1624         /* If EFI reboot not available, use ACPI reboot */
1625         if (!efi_enabled(EFI_BOOT))
1626                 reboot_type = BOOT_ACPI;
1627 }
1628
1629 /*
1630  * User proc fs file handling now deprecated.
1631  * Recommend using /sys/firmware/sgi_uv/... instead.
1632  */
1633 static int __maybe_unused proc_hubbed_show(struct seq_file *file, void *data)
1634 {
1635         pr_notice_once("%s: using deprecated /proc/sgi_uv/hubbed, use /sys/firmware/sgi_uv/hub_type\n",
1636                        current->comm);
1637         seq_printf(file, "0x%x\n", uv_hubbed_system);
1638         return 0;
1639 }
1640
1641 static int __maybe_unused proc_hubless_show(struct seq_file *file, void *data)
1642 {
1643         pr_notice_once("%s: using deprecated /proc/sgi_uv/hubless, use /sys/firmware/sgi_uv/hubless\n",
1644                        current->comm);
1645         seq_printf(file, "0x%x\n", uv_hubless_system);
1646         return 0;
1647 }
1648
1649 static int __maybe_unused proc_archtype_show(struct seq_file *file, void *data)
1650 {
1651         pr_notice_once("%s: using deprecated /proc/sgi_uv/archtype, use /sys/firmware/sgi_uv/archtype\n",
1652                        current->comm);
1653         seq_printf(file, "%s/%s\n", uv_archtype, oem_table_id);
1654         return 0;
1655 }
1656
1657 static __init void uv_setup_proc_files(int hubless)
1658 {
1659         struct proc_dir_entry *pde;
1660
1661         pde = proc_mkdir(UV_PROC_NODE, NULL);
1662         proc_create_single("archtype", 0, pde, proc_archtype_show);
1663         if (hubless)
1664                 proc_create_single("hubless", 0, pde, proc_hubless_show);
1665         else
1666                 proc_create_single("hubbed", 0, pde, proc_hubbed_show);
1667 }
1668
1669 /* Initialize UV hubless systems */
1670 static __init int uv_system_init_hubless(void)
1671 {
1672         int rc;
1673
1674         /* Setup PCH NMI handler */
1675         uv_nmi_setup_hubless();
1676
1677         /* Init kernel/BIOS interface */
1678         rc = uv_bios_init();
1679         if (rc < 0)
1680                 return rc;
1681
1682         /* Process UVsystab */
1683         rc = decode_uv_systab();
1684         if (rc < 0)
1685                 return rc;
1686
1687         /* Set section block size for current node memory */
1688         set_block_size();
1689
1690         /* Create user access node */
1691         if (rc >= 0)
1692                 uv_setup_proc_files(1);
1693
1694         check_efi_reboot();
1695
1696         return rc;
1697 }
1698
1699 static void __init uv_system_init_hub(void)
1700 {
1701         struct uv_hub_info_s hub_info = {0};
1702         int bytes, cpu, nodeid, bid;
1703         unsigned short min_pnode = USHRT_MAX, max_pnode = 0;
1704         char *hub = is_uv5_hub() ? "UV500" :
1705                     is_uv4_hub() ? "UV400" :
1706                     is_uv3_hub() ? "UV300" :
1707                     is_uv2_hub() ? "UV2000/3000" : NULL;
1708         struct uv_hub_info_s **uv_hub_info_list_blade;
1709
1710         if (!hub) {
1711                 pr_err("UV: Unknown/unsupported UV hub\n");
1712                 return;
1713         }
1714         pr_info("UV: Found %s hub\n", hub);
1715
1716         map_low_mmrs();
1717
1718         /* Get uv_systab for decoding, setup UV BIOS calls */
1719         uv_bios_init();
1720
1721         /* If there's an UVsystab problem then abort UV init: */
1722         if (decode_uv_systab() < 0) {
1723                 pr_err("UV: Mangled UVsystab format\n");
1724                 return;
1725         }
1726
1727         build_socket_tables();
1728         build_uv_gr_table();
1729         set_block_size();
1730         uv_init_hub_info(&hub_info);
1731         /* If UV2 or UV3 may need to get # blades from HW */
1732         if (is_uv(UV2|UV3) && !uv_gre_table)
1733                 boot_init_possible_blades(&hub_info);
1734         else
1735                 /* min/max sockets set in decode_gam_rng_tbl */
1736                 uv_possible_blades = (_max_socket - _min_socket) + 1;
1737
1738         /* uv_num_possible_blades() is really the hub count: */
1739         pr_info("UV: Found %d hubs, %d nodes, %d CPUs\n", uv_num_possible_blades(), num_possible_nodes(), num_possible_cpus());
1740
1741         uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id, &sn_region_size, &system_serial_number);
1742         hub_info.coherency_domain_number = sn_coherency_id;
1743         uv_rtc_init();
1744
1745         /*
1746          * __uv_hub_info_list[] is indexed by node, but there is only
1747          * one hub_info structure per blade.  First, allocate one
1748          * structure per blade.  Further down we create a per-node
1749          * table (__uv_hub_info_list[]) pointing to hub_info
1750          * structures for the correct blade.
1751          */
1752
1753         bytes = sizeof(void *) * uv_num_possible_blades();
1754         uv_hub_info_list_blade = kzalloc(bytes, GFP_KERNEL);
1755         if (WARN_ON_ONCE(!uv_hub_info_list_blade))
1756                 return;
1757
1758         bytes = sizeof(struct uv_hub_info_s);
1759         for_each_possible_blade(bid) {
1760                 struct uv_hub_info_s *new_hub;
1761
1762                 /* Allocate & fill new per hub info list */
1763                 new_hub = (bid == 0) ?  &uv_hub_info_node0
1764                         : kzalloc_node(bytes, GFP_KERNEL, uv_blade_to_node(bid));
1765                 if (WARN_ON_ONCE(!new_hub)) {
1766                         /* do not kfree() bid 0, which is statically allocated */
1767                         while (--bid > 0)
1768                                 kfree(uv_hub_info_list_blade[bid]);
1769                         kfree(uv_hub_info_list_blade);
1770                         return;
1771                 }
1772
1773                 uv_hub_info_list_blade[bid] = new_hub;
1774                 *new_hub = hub_info;
1775
1776                 /* Use information from GAM table if available: */
1777                 if (uv_gre_table)
1778                         new_hub->pnode = uv_blade_to_pnode(bid);
1779                 else /* Or fill in during CPU loop: */
1780                         new_hub->pnode = 0xffff;
1781
1782                 new_hub->numa_blade_id = bid;
1783                 new_hub->memory_nid = NUMA_NO_NODE;
1784                 new_hub->nr_possible_cpus = 0;
1785                 new_hub->nr_online_cpus = 0;
1786         }
1787
1788         /*
1789          * Now populate __uv_hub_info_list[] for each node with the
1790          * pointer to the struct for the blade it resides on.
1791          */
1792
1793         bytes = sizeof(void *) * num_possible_nodes();
1794         __uv_hub_info_list = kzalloc(bytes, GFP_KERNEL);
1795         if (WARN_ON_ONCE(!__uv_hub_info_list)) {
1796                 for_each_possible_blade(bid)
1797                         /* bid 0 is statically allocated */
1798                         if (bid != 0)
1799                                 kfree(uv_hub_info_list_blade[bid]);
1800                 kfree(uv_hub_info_list_blade);
1801                 return;
1802         }
1803
1804         for_each_node(nodeid)
1805                 __uv_hub_info_list[nodeid] = uv_hub_info_list_blade[uv_node_to_blade_id(nodeid)];
1806
1807         /* Initialize per CPU info: */
1808         for_each_possible_cpu(cpu) {
1809                 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
1810                 unsigned short bid;
1811                 unsigned short pnode;
1812
1813                 pnode = uv_apicid_to_pnode(apicid);
1814                 bid = uv_pnode_to_socket(pnode) - _min_socket;
1815
1816                 uv_cpu_info_per(cpu)->p_uv_hub_info = uv_hub_info_list_blade[bid];
1817                 uv_cpu_info_per(cpu)->blade_cpu_id = uv_cpu_hub_info(cpu)->nr_possible_cpus++;
1818                 if (uv_cpu_hub_info(cpu)->memory_nid == NUMA_NO_NODE)
1819                         uv_cpu_hub_info(cpu)->memory_nid = cpu_to_node(cpu);
1820
1821                 if (uv_cpu_hub_info(cpu)->pnode == 0xffff)
1822                         uv_cpu_hub_info(cpu)->pnode = pnode;
1823         }
1824
1825         for_each_possible_blade(bid) {
1826                 unsigned short pnode = uv_hub_info_list_blade[bid]->pnode;
1827
1828                 if (pnode == 0xffff)
1829                         continue;
1830
1831                 min_pnode = min(pnode, min_pnode);
1832                 max_pnode = max(pnode, max_pnode);
1833                 pr_info("UV: HUB:%2d pn:%02x nrcpus:%d\n",
1834                         bid,
1835                         uv_hub_info_list_blade[bid]->pnode,
1836                         uv_hub_info_list_blade[bid]->nr_possible_cpus);
1837         }
1838
1839         pr_info("UV: min_pnode:%02x max_pnode:%02x\n", min_pnode, max_pnode);
1840         map_gru_high(max_pnode);
1841         map_mmr_high(max_pnode);
1842         map_mmioh_high(min_pnode, max_pnode);
1843
1844         kfree(uv_hub_info_list_blade);
1845         uv_hub_info_list_blade = NULL;
1846
1847         uv_nmi_setup();
1848         uv_cpu_init();
1849         uv_setup_proc_files(0);
1850
1851         /* Register Legacy VGA I/O redirection handler: */
1852         pci_register_set_vga_state(uv_set_vga_state);
1853
1854         check_efi_reboot();
1855 }
1856
1857 /*
1858  * There is a different code path needed to initialize a UV system that does
1859  * not have a "UV HUB" (referred to as "hubless").
1860  */
1861 void __init uv_system_init(void)
1862 {
1863         if (likely(!is_uv_system() && !is_uv_hubless(1)))
1864                 return;
1865
1866         if (is_uv_system())
1867                 uv_system_init_hub();
1868         else
1869                 uv_system_init_hubless();
1870 }
1871
1872 apic_driver(apic_x2apic_uv_x);