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
uv_undefined(char * str)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
uv_early_read_mmr(unsigned long addr)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
is_GRU_range(u64 start,u64 end)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
uv_is_untracked_pat_range(u64 start,u64 end)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
early_get_pnodeid(void)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 */
early_set_hub_type(void)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
uv_tsc_check_sync(void)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
set_x2apic_bits(void)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
early_get_apic_socketid_shift(void)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
uv_stringify(int len,char * to,char * from)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 */
early_find_archtype(struct uv_systab * st)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 */
decode_arch_type(unsigned long ptr)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 */
early_get_arch_type(void)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
uv_set_system_type(char * _oem_id,char * _oem_table_id)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 */
uv_acpi_madt_oem_check(char * _oem_id,char * _oem_table_id)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
get_uv_system_type(void)500 enum uv_system_type get_uv_system_type(void)
501 {
502 return uv_system_type;
503 }
504
is_uv_system(void)505 int is_uv_system(void)
506 {
507 return uv_system_type != UV_NONE;
508 }
509 EXPORT_SYMBOL_GPL(is_uv_system);
510
is_uv_hubbed(int uvtype)511 int is_uv_hubbed(int uvtype)
512 {
513 return (uv_hubbed_system & uvtype);
514 }
515 EXPORT_SYMBOL_GPL(is_uv_hubbed);
516
is_uv_hubless(int uvtype)517 static int is_uv_hubless(int uvtype)
518 {
519 return (uv_hubless_system & uvtype);
520 }
521
522 void **__uv_hub_info_list;
523 EXPORT_SYMBOL_GPL(__uv_hub_info_list);
524
525 DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
526 EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info);
527
528 short uv_possible_blades;
529 EXPORT_SYMBOL_GPL(uv_possible_blades);
530
531 unsigned long sn_rtc_cycles_per_second;
532 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
533
534 /* The following values are used for the per node hub info struct */
535 static __initdata unsigned short *_node_to_pnode;
536 static __initdata unsigned short _min_socket, _max_socket;
537 static __initdata unsigned short _min_pnode, _max_pnode, _gr_table_len;
538 static __initdata struct uv_gam_range_entry *uv_gre_table;
539 static __initdata struct uv_gam_parameters *uv_gp_table;
540 static __initdata unsigned short *_socket_to_node;
541 static __initdata unsigned short *_socket_to_pnode;
542 static __initdata unsigned short *_pnode_to_socket;
543
544 static __initdata struct uv_gam_range_s *_gr_table;
545
546 #define SOCK_EMPTY ((unsigned short)~0)
547
548 /* Default UV memory block size is 2GB */
549 static unsigned long mem_block_size __initdata = (2UL << 30);
550
551 /* Kernel parameter to specify UV mem block size */
parse_mem_block_size(char * ptr)552 static int __init parse_mem_block_size(char *ptr)
553 {
554 unsigned long size = memparse(ptr, NULL);
555
556 /* Size will be rounded down by set_block_size() below */
557 mem_block_size = size;
558 return 0;
559 }
560 early_param("uv_memblksize", parse_mem_block_size);
561
adj_blksize(u32 lgre)562 static __init int adj_blksize(u32 lgre)
563 {
564 unsigned long base = (unsigned long)lgre << UV_GAM_RANGE_SHFT;
565 unsigned long size;
566
567 for (size = mem_block_size; size > MIN_MEMORY_BLOCK_SIZE; size >>= 1)
568 if (IS_ALIGNED(base, size))
569 break;
570
571 if (size >= mem_block_size)
572 return 0;
573
574 mem_block_size = size;
575 return 1;
576 }
577
set_block_size(void)578 static __init void set_block_size(void)
579 {
580 unsigned int order = ffs(mem_block_size);
581
582 if (order) {
583 /* adjust for ffs return of 1..64 */
584 set_memory_block_size_order(order - 1);
585 pr_info("UV: mem_block_size set to 0x%lx\n", mem_block_size);
586 } else {
587 /* bad or zero value, default to 1UL << 31 (2GB) */
588 pr_err("UV: mem_block_size error with 0x%lx\n", mem_block_size);
589 set_memory_block_size_order(31);
590 }
591 }
592
593 /* Build GAM range lookup table: */
build_uv_gr_table(void)594 static __init void build_uv_gr_table(void)
595 {
596 struct uv_gam_range_entry *gre = uv_gre_table;
597 struct uv_gam_range_s *grt;
598 unsigned long last_limit = 0, ram_limit = 0;
599 int bytes, i, sid, lsid = -1, indx = 0, lindx = -1;
600
601 if (!gre)
602 return;
603
604 bytes = _gr_table_len * sizeof(struct uv_gam_range_s);
605 grt = kzalloc(bytes, GFP_KERNEL);
606 BUG_ON(!grt);
607 _gr_table = grt;
608
609 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
610 if (gre->type == UV_GAM_RANGE_TYPE_HOLE) {
611 if (!ram_limit) {
612 /* Mark hole between RAM/non-RAM: */
613 ram_limit = last_limit;
614 last_limit = gre->limit;
615 lsid++;
616 continue;
617 }
618 last_limit = gre->limit;
619 pr_info("UV: extra hole in GAM RE table @%d\n", (int)(gre - uv_gre_table));
620 continue;
621 }
622 if (_max_socket < gre->sockid) {
623 pr_err("UV: GAM table sockid(%d) too large(>%d) @%d\n", gre->sockid, _max_socket, (int)(gre - uv_gre_table));
624 continue;
625 }
626 sid = gre->sockid - _min_socket;
627 if (lsid < sid) {
628 /* New range: */
629 grt = &_gr_table[indx];
630 grt->base = lindx;
631 grt->nasid = gre->nasid;
632 grt->limit = last_limit = gre->limit;
633 lsid = sid;
634 lindx = indx++;
635 continue;
636 }
637 /* Update range: */
638 if (lsid == sid && !ram_limit) {
639 /* .. if contiguous: */
640 if (grt->limit == last_limit) {
641 grt->limit = last_limit = gre->limit;
642 continue;
643 }
644 }
645 /* Non-contiguous RAM range: */
646 if (!ram_limit) {
647 grt++;
648 grt->base = lindx;
649 grt->nasid = gre->nasid;
650 grt->limit = last_limit = gre->limit;
651 continue;
652 }
653 /* Non-contiguous/non-RAM: */
654 grt++;
655 /* base is this entry */
656 grt->base = grt - _gr_table;
657 grt->nasid = gre->nasid;
658 grt->limit = last_limit = gre->limit;
659 lsid++;
660 }
661
662 /* Shorten table if possible */
663 grt++;
664 i = grt - _gr_table;
665 if (i < _gr_table_len) {
666 void *ret;
667
668 bytes = i * sizeof(struct uv_gam_range_s);
669 ret = krealloc(_gr_table, bytes, GFP_KERNEL);
670 if (ret) {
671 _gr_table = ret;
672 _gr_table_len = i;
673 }
674 }
675
676 /* Display resultant GAM range table: */
677 for (i = 0, grt = _gr_table; i < _gr_table_len; i++, grt++) {
678 unsigned long start, end;
679 int gb = grt->base;
680
681 start = gb < 0 ? 0 : (unsigned long)_gr_table[gb].limit << UV_GAM_RANGE_SHFT;
682 end = (unsigned long)grt->limit << UV_GAM_RANGE_SHFT;
683
684 pr_info("UV: GAM Range %2d %04x 0x%013lx-0x%013lx (%d)\n", i, grt->nasid, start, end, gb);
685 }
686 }
687
uv_wakeup_secondary(int phys_apicid,unsigned long start_rip)688 static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
689 {
690 unsigned long val;
691 int pnode;
692
693 pnode = uv_apicid_to_pnode(phys_apicid);
694
695 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
696 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
697 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
698 APIC_DM_INIT;
699
700 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
701
702 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
703 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
704 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
705 APIC_DM_STARTUP;
706
707 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
708
709 return 0;
710 }
711
uv_send_IPI_one(int cpu,int vector)712 static void uv_send_IPI_one(int cpu, int vector)
713 {
714 unsigned long apicid = per_cpu(x86_cpu_to_apicid, cpu);
715 int pnode = uv_apicid_to_pnode(apicid);
716 unsigned long dmode, val;
717
718 if (vector == NMI_VECTOR)
719 dmode = dest_NMI;
720 else
721 dmode = dest_Fixed;
722
723 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
724 (apicid << UVH_IPI_INT_APIC_ID_SHFT) |
725 (dmode << UVH_IPI_INT_DELIVERY_MODE_SHFT) |
726 (vector << UVH_IPI_INT_VECTOR_SHFT);
727
728 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
729 }
730
uv_send_IPI_mask(const struct cpumask * mask,int vector)731 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
732 {
733 unsigned int cpu;
734
735 for_each_cpu(cpu, mask)
736 uv_send_IPI_one(cpu, vector);
737 }
738
uv_send_IPI_mask_allbutself(const struct cpumask * mask,int vector)739 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
740 {
741 unsigned int this_cpu = smp_processor_id();
742 unsigned int cpu;
743
744 for_each_cpu(cpu, mask) {
745 if (cpu != this_cpu)
746 uv_send_IPI_one(cpu, vector);
747 }
748 }
749
uv_send_IPI_allbutself(int vector)750 static void uv_send_IPI_allbutself(int vector)
751 {
752 unsigned int this_cpu = smp_processor_id();
753 unsigned int cpu;
754
755 for_each_online_cpu(cpu) {
756 if (cpu != this_cpu)
757 uv_send_IPI_one(cpu, vector);
758 }
759 }
760
uv_send_IPI_all(int vector)761 static void uv_send_IPI_all(int vector)
762 {
763 uv_send_IPI_mask(cpu_online_mask, vector);
764 }
765
uv_apic_id_valid(u32 apicid)766 static int uv_apic_id_valid(u32 apicid)
767 {
768 return 1;
769 }
770
uv_apic_id_registered(void)771 static int uv_apic_id_registered(void)
772 {
773 return 1;
774 }
775
uv_init_apic_ldr(void)776 static void uv_init_apic_ldr(void)
777 {
778 }
779
apic_uv_calc_apicid(unsigned int cpu)780 static u32 apic_uv_calc_apicid(unsigned int cpu)
781 {
782 return apic_default_calc_apicid(cpu);
783 }
784
x2apic_get_apic_id(unsigned long id)785 static unsigned int x2apic_get_apic_id(unsigned long id)
786 {
787 return id;
788 }
789
set_apic_id(unsigned int id)790 static u32 set_apic_id(unsigned int id)
791 {
792 return id;
793 }
794
uv_read_apic_id(void)795 static unsigned int uv_read_apic_id(void)
796 {
797 return x2apic_get_apic_id(apic_read(APIC_ID));
798 }
799
uv_phys_pkg_id(int initial_apicid,int index_msb)800 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
801 {
802 return uv_read_apic_id() >> index_msb;
803 }
804
uv_send_IPI_self(int vector)805 static void uv_send_IPI_self(int vector)
806 {
807 apic_write(APIC_SELF_IPI, vector);
808 }
809
uv_probe(void)810 static int uv_probe(void)
811 {
812 return apic == &apic_x2apic_uv_x;
813 }
814
815 static struct apic apic_x2apic_uv_x __ro_after_init = {
816
817 .name = "UV large system",
818 .probe = uv_probe,
819 .acpi_madt_oem_check = uv_acpi_madt_oem_check,
820 .apic_id_valid = uv_apic_id_valid,
821 .apic_id_registered = uv_apic_id_registered,
822
823 .irq_delivery_mode = dest_Fixed,
824 .irq_dest_mode = 0, /* Physical */
825
826 .disable_esr = 0,
827 .dest_logical = APIC_DEST_LOGICAL,
828 .check_apicid_used = NULL,
829
830 .init_apic_ldr = uv_init_apic_ldr,
831
832 .ioapic_phys_id_map = NULL,
833 .setup_apic_routing = NULL,
834 .cpu_present_to_apicid = default_cpu_present_to_apicid,
835 .apicid_to_cpu_present = NULL,
836 .check_phys_apicid_present = default_check_phys_apicid_present,
837 .phys_pkg_id = uv_phys_pkg_id,
838
839 .get_apic_id = x2apic_get_apic_id,
840 .set_apic_id = set_apic_id,
841
842 .calc_dest_apicid = apic_uv_calc_apicid,
843
844 .send_IPI = uv_send_IPI_one,
845 .send_IPI_mask = uv_send_IPI_mask,
846 .send_IPI_mask_allbutself = uv_send_IPI_mask_allbutself,
847 .send_IPI_allbutself = uv_send_IPI_allbutself,
848 .send_IPI_all = uv_send_IPI_all,
849 .send_IPI_self = uv_send_IPI_self,
850
851 .wakeup_secondary_cpu = uv_wakeup_secondary,
852 .inquire_remote_apic = NULL,
853
854 .read = native_apic_msr_read,
855 .write = native_apic_msr_write,
856 .eoi_write = native_apic_msr_eoi_write,
857 .icr_read = native_x2apic_icr_read,
858 .icr_write = native_x2apic_icr_write,
859 .wait_icr_idle = native_x2apic_wait_icr_idle,
860 .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
861 };
862
863 #define UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH 3
864 #define DEST_SHIFT UVXH_RH_GAM_ALIAS_0_REDIRECT_CONFIG_DEST_BASE_SHFT
865
get_lowmem_redirect(unsigned long * base,unsigned long * size)866 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
867 {
868 union uvh_rh_gam_alias_2_overlay_config_u alias;
869 union uvh_rh_gam_alias_2_redirect_config_u redirect;
870 unsigned long m_redirect;
871 unsigned long m_overlay;
872 int i;
873
874 for (i = 0; i < UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH; i++) {
875 switch (i) {
876 case 0:
877 m_redirect = UVH_RH_GAM_ALIAS_0_REDIRECT_CONFIG;
878 m_overlay = UVH_RH_GAM_ALIAS_0_OVERLAY_CONFIG;
879 break;
880 case 1:
881 m_redirect = UVH_RH_GAM_ALIAS_1_REDIRECT_CONFIG;
882 m_overlay = UVH_RH_GAM_ALIAS_1_OVERLAY_CONFIG;
883 break;
884 case 2:
885 m_redirect = UVH_RH_GAM_ALIAS_2_REDIRECT_CONFIG;
886 m_overlay = UVH_RH_GAM_ALIAS_2_OVERLAY_CONFIG;
887 break;
888 }
889 alias.v = uv_read_local_mmr(m_overlay);
890 if (alias.s.enable && alias.s.base == 0) {
891 *size = (1UL << alias.s.m_alias);
892 redirect.v = uv_read_local_mmr(m_redirect);
893 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
894 return;
895 }
896 }
897 *base = *size = 0;
898 }
899
900 enum map_type {map_wb, map_uc};
901 static const char * const mt[] = { "WB", "UC" };
902
map_high(char * id,unsigned long base,int pshift,int bshift,int max_pnode,enum map_type map_type)903 static __init void map_high(char *id, unsigned long base, int pshift, int bshift, int max_pnode, enum map_type map_type)
904 {
905 unsigned long bytes, paddr;
906
907 paddr = base << pshift;
908 bytes = (1UL << bshift) * (max_pnode + 1);
909 if (!paddr) {
910 pr_info("UV: Map %s_HI base address NULL\n", id);
911 return;
912 }
913 if (map_type == map_uc)
914 init_extra_mapping_uc(paddr, bytes);
915 else
916 init_extra_mapping_wb(paddr, bytes);
917
918 pr_info("UV: Map %s_HI 0x%lx - 0x%lx %s (%d segments)\n",
919 id, paddr, paddr + bytes, mt[map_type], max_pnode + 1);
920 }
921
map_gru_high(int max_pnode)922 static __init void map_gru_high(int max_pnode)
923 {
924 union uvh_rh_gam_gru_overlay_config_u gru;
925 unsigned long mask, base;
926 int shift;
927
928 if (UVH_RH_GAM_GRU_OVERLAY_CONFIG) {
929 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG);
930 shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
931 mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
932 } else if (UVH_RH10_GAM_GRU_OVERLAY_CONFIG) {
933 gru.v = uv_read_local_mmr(UVH_RH10_GAM_GRU_OVERLAY_CONFIG);
934 shift = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
935 mask = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
936 } else {
937 pr_err("UV: GRU unavailable (no MMR)\n");
938 return;
939 }
940
941 if (!gru.s.enable) {
942 pr_info("UV: GRU disabled (by BIOS)\n");
943 return;
944 }
945
946 base = (gru.v & mask) >> shift;
947 map_high("GRU", base, shift, shift, max_pnode, map_wb);
948 gru_start_paddr = ((u64)base << shift);
949 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
950 }
951
map_mmr_high(int max_pnode)952 static __init void map_mmr_high(int max_pnode)
953 {
954 unsigned long base;
955 int shift;
956 bool enable;
957
958 if (UVH_RH10_GAM_MMR_OVERLAY_CONFIG) {
959 union uvh_rh10_gam_mmr_overlay_config_u mmr;
960
961 mmr.v = uv_read_local_mmr(UVH_RH10_GAM_MMR_OVERLAY_CONFIG);
962 enable = mmr.s.enable;
963 base = mmr.s.base;
964 shift = UVH_RH10_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
965 } else if (UVH_RH_GAM_MMR_OVERLAY_CONFIG) {
966 union uvh_rh_gam_mmr_overlay_config_u mmr;
967
968 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG);
969 enable = mmr.s.enable;
970 base = mmr.s.base;
971 shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
972 } else {
973 pr_err("UV:%s:RH_GAM_MMR_OVERLAY_CONFIG MMR undefined?\n",
974 __func__);
975 return;
976 }
977
978 if (enable)
979 map_high("MMR", base, shift, shift, max_pnode, map_uc);
980 else
981 pr_info("UV: MMR disabled\n");
982 }
983
984 /* Arch specific ENUM cases */
985 enum mmioh_arch {
986 UV2_MMIOH = -1,
987 UVY_MMIOH0, UVY_MMIOH1,
988 UVX_MMIOH0, UVX_MMIOH1,
989 };
990
991 /* Calculate and Map MMIOH Regions */
calc_mmioh_map(enum mmioh_arch index,int min_pnode,int max_pnode,int shift,unsigned long base,int m_io,int n_io)992 static void __init calc_mmioh_map(enum mmioh_arch index,
993 int min_pnode, int max_pnode,
994 int shift, unsigned long base, int m_io, int n_io)
995 {
996 unsigned long mmr, nasid_mask;
997 int nasid, min_nasid, max_nasid, lnasid, mapped;
998 int i, fi, li, n, max_io;
999 char id[8];
1000
1001 /* One (UV2) mapping */
1002 if (index == UV2_MMIOH) {
1003 strncpy(id, "MMIOH", sizeof(id));
1004 max_io = max_pnode;
1005 mapped = 0;
1006 goto map_exit;
1007 }
1008
1009 /* small and large MMIOH mappings */
1010 switch (index) {
1011 case UVY_MMIOH0:
1012 mmr = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG0;
1013 nasid_mask = UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0_BASE_MASK;
1014 n = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG0_DEPTH;
1015 min_nasid = min_pnode;
1016 max_nasid = max_pnode;
1017 mapped = 1;
1018 break;
1019 case UVY_MMIOH1:
1020 mmr = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG1;
1021 nasid_mask = UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1_BASE_MASK;
1022 n = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG1_DEPTH;
1023 min_nasid = min_pnode;
1024 max_nasid = max_pnode;
1025 mapped = 1;
1026 break;
1027 case UVX_MMIOH0:
1028 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0;
1029 nasid_mask = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_BASE_MASK;
1030 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_DEPTH;
1031 min_nasid = min_pnode * 2;
1032 max_nasid = max_pnode * 2;
1033 mapped = 1;
1034 break;
1035 case UVX_MMIOH1:
1036 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1;
1037 nasid_mask = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_BASE_MASK;
1038 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_DEPTH;
1039 min_nasid = min_pnode * 2;
1040 max_nasid = max_pnode * 2;
1041 mapped = 1;
1042 break;
1043 default:
1044 pr_err("UV:%s:Invalid mapping type:%d\n", __func__, index);
1045 return;
1046 }
1047
1048 /* enum values chosen so (index mod 2) is MMIOH 0/1 (low/high) */
1049 snprintf(id, sizeof(id), "MMIOH%d", index%2);
1050
1051 max_io = lnasid = fi = li = -1;
1052 for (i = 0; i < n; i++) {
1053 unsigned long m_redirect = mmr + i * 8;
1054 unsigned long redirect = uv_read_local_mmr(m_redirect);
1055
1056 nasid = redirect & nasid_mask;
1057 if (i == 0)
1058 pr_info("UV: %s redirect base 0x%lx(@0x%lx) 0x%04x\n",
1059 id, redirect, m_redirect, nasid);
1060
1061 /* Invalid NASID check */
1062 if (nasid < min_nasid || max_nasid < nasid) {
1063 pr_err("UV:%s:Invalid NASID:%x (range:%x..%x)\n",
1064 __func__, index, min_nasid, max_nasid);
1065 nasid = -1;
1066 }
1067
1068 if (nasid == lnasid) {
1069 li = i;
1070 /* Last entry check: */
1071 if (i != n-1)
1072 continue;
1073 }
1074
1075 /* Check if we have a cached (or last) redirect to print: */
1076 if (lnasid != -1 || (i == n-1 && nasid != -1)) {
1077 unsigned long addr1, addr2;
1078 int f, l;
1079
1080 if (lnasid == -1) {
1081 f = l = i;
1082 lnasid = nasid;
1083 } else {
1084 f = fi;
1085 l = li;
1086 }
1087 addr1 = (base << shift) + f * (1ULL << m_io);
1088 addr2 = (base << shift) + (l + 1) * (1ULL << m_io);
1089 pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n",
1090 id, fi, li, lnasid, addr1, addr2);
1091 if (max_io < l)
1092 max_io = l;
1093 }
1094 fi = li = i;
1095 lnasid = nasid;
1096 }
1097
1098 map_exit:
1099 pr_info("UV: %s base:0x%lx shift:%d m_io:%d max_io:%d max_pnode:0x%x\n",
1100 id, base, shift, m_io, max_io, max_pnode);
1101
1102 if (max_io >= 0 && !mapped)
1103 map_high(id, base, shift, m_io, max_io, map_uc);
1104 }
1105
map_mmioh_high(int min_pnode,int max_pnode)1106 static __init void map_mmioh_high(int min_pnode, int max_pnode)
1107 {
1108 /* UVY flavor */
1109 if (UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0) {
1110 union uvh_rh10_gam_mmioh_overlay_config0_u mmioh0;
1111 union uvh_rh10_gam_mmioh_overlay_config1_u mmioh1;
1112
1113 mmioh0.v = uv_read_local_mmr(UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0);
1114 if (unlikely(mmioh0.s.enable == 0))
1115 pr_info("UV: MMIOH0 disabled\n");
1116 else
1117 calc_mmioh_map(UVY_MMIOH0, min_pnode, max_pnode,
1118 UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0_BASE_SHFT,
1119 mmioh0.s.base, mmioh0.s.m_io, mmioh0.s.n_io);
1120
1121 mmioh1.v = uv_read_local_mmr(UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1);
1122 if (unlikely(mmioh1.s.enable == 0))
1123 pr_info("UV: MMIOH1 disabled\n");
1124 else
1125 calc_mmioh_map(UVY_MMIOH1, min_pnode, max_pnode,
1126 UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1_BASE_SHFT,
1127 mmioh1.s.base, mmioh1.s.m_io, mmioh1.s.n_io);
1128 return;
1129 }
1130 /* UVX flavor */
1131 if (UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0) {
1132 union uvh_rh_gam_mmioh_overlay_config0_u mmioh0;
1133 union uvh_rh_gam_mmioh_overlay_config1_u mmioh1;
1134
1135 mmioh0.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0);
1136 if (unlikely(mmioh0.s.enable == 0))
1137 pr_info("UV: MMIOH0 disabled\n");
1138 else {
1139 unsigned long base = uvxy_field(mmioh0, base, 0);
1140 int m_io = uvxy_field(mmioh0, m_io, 0);
1141 int n_io = uvxy_field(mmioh0, n_io, 0);
1142
1143 calc_mmioh_map(UVX_MMIOH0, min_pnode, max_pnode,
1144 UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_BASE_SHFT,
1145 base, m_io, n_io);
1146 }
1147
1148 mmioh1.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1);
1149 if (unlikely(mmioh1.s.enable == 0))
1150 pr_info("UV: MMIOH1 disabled\n");
1151 else {
1152 unsigned long base = uvxy_field(mmioh1, base, 0);
1153 int m_io = uvxy_field(mmioh1, m_io, 0);
1154 int n_io = uvxy_field(mmioh1, n_io, 0);
1155
1156 calc_mmioh_map(UVX_MMIOH1, min_pnode, max_pnode,
1157 UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_BASE_SHFT,
1158 base, m_io, n_io);
1159 }
1160 return;
1161 }
1162
1163 /* UV2 flavor */
1164 if (UVH_RH_GAM_MMIOH_OVERLAY_CONFIG) {
1165 union uvh_rh_gam_mmioh_overlay_config_u mmioh;
1166
1167 mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG);
1168 if (unlikely(mmioh.s2.enable == 0))
1169 pr_info("UV: MMIOH disabled\n");
1170 else
1171 calc_mmioh_map(UV2_MMIOH, min_pnode, max_pnode,
1172 UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_BASE_SHFT,
1173 mmioh.s2.base, mmioh.s2.m_io, mmioh.s2.n_io);
1174 return;
1175 }
1176 }
1177
map_low_mmrs(void)1178 static __init void map_low_mmrs(void)
1179 {
1180 if (UV_GLOBAL_MMR32_BASE)
1181 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
1182
1183 if (UV_LOCAL_MMR_BASE)
1184 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
1185 }
1186
uv_rtc_init(void)1187 static __init void uv_rtc_init(void)
1188 {
1189 long status;
1190 u64 ticks_per_sec;
1191
1192 status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec);
1193
1194 if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
1195 pr_warn("UV: unable to determine platform RTC clock frequency, guessing.\n");
1196
1197 /* BIOS gives wrong value for clock frequency, so guess: */
1198 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
1199 } else {
1200 sn_rtc_cycles_per_second = ticks_per_sec;
1201 }
1202 }
1203
1204 /* Direct Legacy VGA I/O traffic to designated IOH */
uv_set_vga_state(struct pci_dev * pdev,bool decode,unsigned int command_bits,u32 flags)1205 static int uv_set_vga_state(struct pci_dev *pdev, bool decode, unsigned int command_bits, u32 flags)
1206 {
1207 int domain, bus, rc;
1208
1209 if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
1210 return 0;
1211
1212 if ((command_bits & PCI_COMMAND_IO) == 0)
1213 return 0;
1214
1215 domain = pci_domain_nr(pdev->bus);
1216 bus = pdev->bus->number;
1217
1218 rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
1219
1220 return rc;
1221 }
1222
1223 /*
1224 * Called on each CPU to initialize the per_cpu UV data area.
1225 * FIXME: hotplug not supported yet
1226 */
uv_cpu_init(void)1227 void uv_cpu_init(void)
1228 {
1229 /* CPU 0 initialization will be done via uv_system_init. */
1230 if (smp_processor_id() == 0)
1231 return;
1232
1233 uv_hub_info->nr_online_cpus++;
1234 }
1235
1236 struct mn {
1237 unsigned char m_val;
1238 unsigned char n_val;
1239 unsigned char m_shift;
1240 unsigned char n_lshift;
1241 };
1242
1243 /* Initialize caller's MN struct and fill in values */
get_mn(struct mn * mnp)1244 static void get_mn(struct mn *mnp)
1245 {
1246 memset(mnp, 0, sizeof(*mnp));
1247 mnp->n_val = uv_cpuid.n_skt;
1248 if (is_uv(UV4|UVY)) {
1249 mnp->m_val = 0;
1250 mnp->n_lshift = 0;
1251 } else if (is_uv3_hub()) {
1252 union uvyh_gr0_gam_gr_config_u m_gr_config;
1253
1254 mnp->m_val = uv_cpuid.m_skt;
1255 m_gr_config.v = uv_read_local_mmr(UVH_GR0_GAM_GR_CONFIG);
1256 mnp->n_lshift = m_gr_config.s3.m_skt;
1257 } else if (is_uv2_hub()) {
1258 mnp->m_val = uv_cpuid.m_skt;
1259 mnp->n_lshift = mnp->m_val == 40 ? 40 : 39;
1260 }
1261 mnp->m_shift = mnp->m_val ? 64 - mnp->m_val : 0;
1262 }
1263
uv_init_hub_info(struct uv_hub_info_s * hi)1264 static void __init uv_init_hub_info(struct uv_hub_info_s *hi)
1265 {
1266 struct mn mn;
1267
1268 get_mn(&mn);
1269 hi->gpa_mask = mn.m_val ?
1270 (1UL << (mn.m_val + mn.n_val)) - 1 :
1271 (1UL << uv_cpuid.gpa_shift) - 1;
1272
1273 hi->m_val = mn.m_val;
1274 hi->n_val = mn.n_val;
1275 hi->m_shift = mn.m_shift;
1276 hi->n_lshift = mn.n_lshift ? mn.n_lshift : 0;
1277 hi->hub_revision = uv_hub_info->hub_revision;
1278 hi->hub_type = uv_hub_info->hub_type;
1279 hi->pnode_mask = uv_cpuid.pnode_mask;
1280 hi->nasid_shift = uv_cpuid.nasid_shift;
1281 hi->min_pnode = _min_pnode;
1282 hi->min_socket = _min_socket;
1283 hi->pnode_to_socket = _pnode_to_socket;
1284 hi->socket_to_node = _socket_to_node;
1285 hi->socket_to_pnode = _socket_to_pnode;
1286 hi->gr_table_len = _gr_table_len;
1287 hi->gr_table = _gr_table;
1288
1289 uv_cpuid.gnode_shift = max_t(unsigned int, uv_cpuid.gnode_shift, mn.n_val);
1290 hi->gnode_extra = (uv_node_id & ~((1 << uv_cpuid.gnode_shift) - 1)) >> 1;
1291 if (mn.m_val)
1292 hi->gnode_upper = (u64)hi->gnode_extra << mn.m_val;
1293
1294 if (uv_gp_table) {
1295 hi->global_mmr_base = uv_gp_table->mmr_base;
1296 hi->global_mmr_shift = uv_gp_table->mmr_shift;
1297 hi->global_gru_base = uv_gp_table->gru_base;
1298 hi->global_gru_shift = uv_gp_table->gru_shift;
1299 hi->gpa_shift = uv_gp_table->gpa_shift;
1300 hi->gpa_mask = (1UL << hi->gpa_shift) - 1;
1301 } else {
1302 hi->global_mmr_base =
1303 uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG) &
1304 ~UV_MMR_ENABLE;
1305 hi->global_mmr_shift = _UV_GLOBAL_MMR64_PNODE_SHIFT;
1306 }
1307
1308 get_lowmem_redirect(&hi->lowmem_remap_base, &hi->lowmem_remap_top);
1309
1310 hi->apic_pnode_shift = uv_cpuid.socketid_shift;
1311
1312 /* Show system specific info: */
1313 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);
1314 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);
1315 pr_info("UV: mmr_base/shift:0x%lx/%ld\n", hi->global_mmr_base, hi->global_mmr_shift);
1316 if (hi->global_gru_base)
1317 pr_info("UV: gru_base/shift:0x%lx/%ld\n",
1318 hi->global_gru_base, hi->global_gru_shift);
1319
1320 pr_info("UV: gnode_upper:0x%lx gnode_extra:0x%x\n", hi->gnode_upper, hi->gnode_extra);
1321 }
1322
decode_gam_params(unsigned long ptr)1323 static void __init decode_gam_params(unsigned long ptr)
1324 {
1325 uv_gp_table = (struct uv_gam_parameters *)ptr;
1326
1327 pr_info("UV: GAM Params...\n");
1328 pr_info("UV: mmr_base/shift:0x%llx/%d gru_base/shift:0x%llx/%d gpa_shift:%d\n",
1329 uv_gp_table->mmr_base, uv_gp_table->mmr_shift,
1330 uv_gp_table->gru_base, uv_gp_table->gru_shift,
1331 uv_gp_table->gpa_shift);
1332 }
1333
decode_gam_rng_tbl(unsigned long ptr)1334 static void __init decode_gam_rng_tbl(unsigned long ptr)
1335 {
1336 struct uv_gam_range_entry *gre = (struct uv_gam_range_entry *)ptr;
1337 unsigned long lgre = 0;
1338 int index = 0;
1339 int sock_min = 999999, pnode_min = 99999;
1340 int sock_max = -1, pnode_max = -1;
1341
1342 uv_gre_table = gre;
1343 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1344 unsigned long size = ((unsigned long)(gre->limit - lgre)
1345 << UV_GAM_RANGE_SHFT);
1346 int order = 0;
1347 char suffix[] = " KMGTPE";
1348 int flag = ' ';
1349
1350 while (size > 9999 && order < sizeof(suffix)) {
1351 size /= 1024;
1352 order++;
1353 }
1354
1355 /* adjust max block size to current range start */
1356 if (gre->type == 1 || gre->type == 2)
1357 if (adj_blksize(lgre))
1358 flag = '*';
1359
1360 if (!index) {
1361 pr_info("UV: GAM Range Table...\n");
1362 pr_info("UV: # %20s %14s %6s %4s %5s %3s %2s\n", "Range", "", "Size", "Type", "NASID", "SID", "PN");
1363 }
1364 pr_info("UV: %2d: 0x%014lx-0x%014lx%c %5lu%c %3d %04x %02x %02x\n",
1365 index++,
1366 (unsigned long)lgre << UV_GAM_RANGE_SHFT,
1367 (unsigned long)gre->limit << UV_GAM_RANGE_SHFT,
1368 flag, size, suffix[order],
1369 gre->type, gre->nasid, gre->sockid, gre->pnode);
1370
1371 /* update to next range start */
1372 lgre = gre->limit;
1373 if (sock_min > gre->sockid)
1374 sock_min = gre->sockid;
1375 if (sock_max < gre->sockid)
1376 sock_max = gre->sockid;
1377 if (pnode_min > gre->pnode)
1378 pnode_min = gre->pnode;
1379 if (pnode_max < gre->pnode)
1380 pnode_max = gre->pnode;
1381 }
1382 _min_socket = sock_min;
1383 _max_socket = sock_max;
1384 _min_pnode = pnode_min;
1385 _max_pnode = pnode_max;
1386 _gr_table_len = index;
1387
1388 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);
1389 }
1390
1391 /* Walk through UVsystab decoding the fields */
decode_uv_systab(void)1392 static int __init decode_uv_systab(void)
1393 {
1394 struct uv_systab *st;
1395 int i;
1396
1397 /* Get mapped UVsystab pointer */
1398 st = uv_systab;
1399
1400 /* If UVsystab is version 1, there is no extended UVsystab */
1401 if (st && st->revision == UV_SYSTAB_VERSION_1)
1402 return 0;
1403
1404 if ((!st) || (st->revision < UV_SYSTAB_VERSION_UV4_LATEST)) {
1405 int rev = st ? st->revision : 0;
1406
1407 pr_err("UV: BIOS UVsystab mismatch, (%x < %x)\n",
1408 rev, UV_SYSTAB_VERSION_UV4_LATEST);
1409 pr_err("UV: Does not support UV, switch to non-UV x86_64\n");
1410 uv_system_type = UV_NONE;
1411
1412 return -EINVAL;
1413 }
1414
1415 for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
1416 unsigned long ptr = st->entry[i].offset;
1417
1418 if (!ptr)
1419 continue;
1420
1421 /* point to payload */
1422 ptr += (unsigned long)st;
1423
1424 switch (st->entry[i].type) {
1425 case UV_SYSTAB_TYPE_GAM_PARAMS:
1426 decode_gam_params(ptr);
1427 break;
1428
1429 case UV_SYSTAB_TYPE_GAM_RNG_TBL:
1430 decode_gam_rng_tbl(ptr);
1431 break;
1432
1433 case UV_SYSTAB_TYPE_ARCH_TYPE:
1434 /* already processed in early startup */
1435 break;
1436
1437 default:
1438 pr_err("UV:%s:Unrecognized UV_SYSTAB_TYPE:%d, skipped\n",
1439 __func__, st->entry[i].type);
1440 break;
1441 }
1442 }
1443 return 0;
1444 }
1445
1446 /* Set up physical blade translations from UVH_NODE_PRESENT_TABLE */
boot_init_possible_blades(struct uv_hub_info_s * hub_info)1447 static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
1448 {
1449 unsigned long np;
1450 int i, uv_pb = 0;
1451
1452 if (UVH_NODE_PRESENT_TABLE) {
1453 pr_info("UV: NODE_PRESENT_DEPTH = %d\n",
1454 UVH_NODE_PRESENT_TABLE_DEPTH);
1455 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
1456 np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
1457 pr_info("UV: NODE_PRESENT(%d) = 0x%016lx\n", i, np);
1458 uv_pb += hweight64(np);
1459 }
1460 }
1461 if (UVH_NODE_PRESENT_0) {
1462 np = uv_read_local_mmr(UVH_NODE_PRESENT_0);
1463 pr_info("UV: NODE_PRESENT_0 = 0x%016lx\n", np);
1464 uv_pb += hweight64(np);
1465 }
1466 if (UVH_NODE_PRESENT_1) {
1467 np = uv_read_local_mmr(UVH_NODE_PRESENT_1);
1468 pr_info("UV: NODE_PRESENT_1 = 0x%016lx\n", np);
1469 uv_pb += hweight64(np);
1470 }
1471 if (uv_possible_blades != uv_pb)
1472 uv_possible_blades = uv_pb;
1473
1474 pr_info("UV: number nodes/possible blades %d\n", uv_pb);
1475 }
1476
build_socket_tables(void)1477 static void __init build_socket_tables(void)
1478 {
1479 struct uv_gam_range_entry *gre = uv_gre_table;
1480 int num, nump;
1481 int cpu, i, lnid;
1482 int minsock = _min_socket;
1483 int maxsock = _max_socket;
1484 int minpnode = _min_pnode;
1485 int maxpnode = _max_pnode;
1486 size_t bytes;
1487
1488 if (!gre) {
1489 if (is_uv2_hub() || is_uv3_hub()) {
1490 pr_info("UV: No UVsystab socket table, ignoring\n");
1491 return;
1492 }
1493 pr_err("UV: Error: UVsystab address translations not available!\n");
1494 BUG();
1495 }
1496
1497 /* Build socket id -> node id, pnode */
1498 num = maxsock - minsock + 1;
1499 bytes = num * sizeof(_socket_to_node[0]);
1500 _socket_to_node = kmalloc(bytes, GFP_KERNEL);
1501 _socket_to_pnode = kmalloc(bytes, GFP_KERNEL);
1502
1503 nump = maxpnode - minpnode + 1;
1504 bytes = nump * sizeof(_pnode_to_socket[0]);
1505 _pnode_to_socket = kmalloc(bytes, GFP_KERNEL);
1506 BUG_ON(!_socket_to_node || !_socket_to_pnode || !_pnode_to_socket);
1507
1508 for (i = 0; i < num; i++)
1509 _socket_to_node[i] = _socket_to_pnode[i] = SOCK_EMPTY;
1510
1511 for (i = 0; i < nump; i++)
1512 _pnode_to_socket[i] = SOCK_EMPTY;
1513
1514 /* Fill in pnode/node/addr conversion list values: */
1515 pr_info("UV: GAM Building socket/pnode conversion tables\n");
1516 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1517 if (gre->type == UV_GAM_RANGE_TYPE_HOLE)
1518 continue;
1519 i = gre->sockid - minsock;
1520 /* Duplicate: */
1521 if (_socket_to_pnode[i] != SOCK_EMPTY)
1522 continue;
1523 _socket_to_pnode[i] = gre->pnode;
1524
1525 i = gre->pnode - minpnode;
1526 _pnode_to_socket[i] = gre->sockid;
1527
1528 pr_info("UV: sid:%02x type:%d nasid:%04x pn:%02x pn2s:%2x\n",
1529 gre->sockid, gre->type, gre->nasid,
1530 _socket_to_pnode[gre->sockid - minsock],
1531 _pnode_to_socket[gre->pnode - minpnode]);
1532 }
1533
1534 /* Set socket -> node values: */
1535 lnid = NUMA_NO_NODE;
1536 for_each_present_cpu(cpu) {
1537 int nid = cpu_to_node(cpu);
1538 int apicid, sockid;
1539
1540 if (lnid == nid)
1541 continue;
1542 lnid = nid;
1543 apicid = per_cpu(x86_cpu_to_apicid, cpu);
1544 sockid = apicid >> uv_cpuid.socketid_shift;
1545 _socket_to_node[sockid - minsock] = nid;
1546 pr_info("UV: sid:%02x: apicid:%04x node:%2d\n",
1547 sockid, apicid, nid);
1548 }
1549
1550 /* Set up physical blade to pnode translation from GAM Range Table: */
1551 bytes = num_possible_nodes() * sizeof(_node_to_pnode[0]);
1552 _node_to_pnode = kmalloc(bytes, GFP_KERNEL);
1553 BUG_ON(!_node_to_pnode);
1554
1555 for (lnid = 0; lnid < num_possible_nodes(); lnid++) {
1556 unsigned short sockid;
1557
1558 for (sockid = minsock; sockid <= maxsock; sockid++) {
1559 if (lnid == _socket_to_node[sockid - minsock]) {
1560 _node_to_pnode[lnid] = _socket_to_pnode[sockid - minsock];
1561 break;
1562 }
1563 }
1564 if (sockid > maxsock) {
1565 pr_err("UV: socket for node %d not found!\n", lnid);
1566 BUG();
1567 }
1568 }
1569
1570 /*
1571 * If socket id == pnode or socket id == node for all nodes,
1572 * system runs faster by removing corresponding conversion table.
1573 */
1574 pr_info("UV: Checking socket->node/pnode for identity maps\n");
1575 if (minsock == 0) {
1576 for (i = 0; i < num; i++)
1577 if (_socket_to_node[i] == SOCK_EMPTY || i != _socket_to_node[i])
1578 break;
1579 if (i >= num) {
1580 kfree(_socket_to_node);
1581 _socket_to_node = NULL;
1582 pr_info("UV: 1:1 socket_to_node table removed\n");
1583 }
1584 }
1585 if (minsock == minpnode) {
1586 for (i = 0; i < num; i++)
1587 if (_socket_to_pnode[i] != SOCK_EMPTY &&
1588 _socket_to_pnode[i] != i + minpnode)
1589 break;
1590 if (i >= num) {
1591 kfree(_socket_to_pnode);
1592 _socket_to_pnode = NULL;
1593 pr_info("UV: 1:1 socket_to_pnode table removed\n");
1594 }
1595 }
1596 }
1597
1598 /* Check which reboot to use */
check_efi_reboot(void)1599 static void check_efi_reboot(void)
1600 {
1601 /* If EFI reboot not available, use ACPI reboot */
1602 if (!efi_enabled(EFI_BOOT))
1603 reboot_type = BOOT_ACPI;
1604 }
1605
1606 /* Setup user proc fs files */
proc_hubbed_show(struct seq_file * file,void * data)1607 static int __maybe_unused proc_hubbed_show(struct seq_file *file, void *data)
1608 {
1609 seq_printf(file, "0x%x\n", uv_hubbed_system);
1610 return 0;
1611 }
1612
proc_hubless_show(struct seq_file * file,void * data)1613 static int __maybe_unused proc_hubless_show(struct seq_file *file, void *data)
1614 {
1615 seq_printf(file, "0x%x\n", uv_hubless_system);
1616 return 0;
1617 }
1618
proc_archtype_show(struct seq_file * file,void * data)1619 static int __maybe_unused proc_archtype_show(struct seq_file *file, void *data)
1620 {
1621 seq_printf(file, "%s/%s\n", uv_archtype, oem_table_id);
1622 return 0;
1623 }
1624
uv_setup_proc_files(int hubless)1625 static __init void uv_setup_proc_files(int hubless)
1626 {
1627 struct proc_dir_entry *pde;
1628
1629 pde = proc_mkdir(UV_PROC_NODE, NULL);
1630 proc_create_single("archtype", 0, pde, proc_archtype_show);
1631 if (hubless)
1632 proc_create_single("hubless", 0, pde, proc_hubless_show);
1633 else
1634 proc_create_single("hubbed", 0, pde, proc_hubbed_show);
1635 }
1636
1637 /* Initialize UV hubless systems */
uv_system_init_hubless(void)1638 static __init int uv_system_init_hubless(void)
1639 {
1640 int rc;
1641
1642 /* Setup PCH NMI handler */
1643 uv_nmi_setup_hubless();
1644
1645 /* Init kernel/BIOS interface */
1646 rc = uv_bios_init();
1647 if (rc < 0)
1648 return rc;
1649
1650 /* Process UVsystab */
1651 rc = decode_uv_systab();
1652 if (rc < 0)
1653 return rc;
1654
1655 /* Set section block size for current node memory */
1656 set_block_size();
1657
1658 /* Create user access node */
1659 if (rc >= 0)
1660 uv_setup_proc_files(1);
1661
1662 check_efi_reboot();
1663
1664 return rc;
1665 }
1666
uv_system_init_hub(void)1667 static void __init uv_system_init_hub(void)
1668 {
1669 struct uv_hub_info_s hub_info = {0};
1670 int bytes, cpu, nodeid;
1671 unsigned short min_pnode = 9999, max_pnode = 0;
1672 char *hub = is_uv5_hub() ? "UV500" :
1673 is_uv4_hub() ? "UV400" :
1674 is_uv3_hub() ? "UV300" :
1675 is_uv2_hub() ? "UV2000/3000" : NULL;
1676
1677 if (!hub) {
1678 pr_err("UV: Unknown/unsupported UV hub\n");
1679 return;
1680 }
1681 pr_info("UV: Found %s hub\n", hub);
1682
1683 map_low_mmrs();
1684
1685 /* Get uv_systab for decoding, setup UV BIOS calls */
1686 uv_bios_init();
1687
1688 /* If there's an UVsystab problem then abort UV init: */
1689 if (decode_uv_systab() < 0) {
1690 pr_err("UV: Mangled UVsystab format\n");
1691 return;
1692 }
1693
1694 build_socket_tables();
1695 build_uv_gr_table();
1696 set_block_size();
1697 uv_init_hub_info(&hub_info);
1698 uv_possible_blades = num_possible_nodes();
1699 if (!_node_to_pnode)
1700 boot_init_possible_blades(&hub_info);
1701
1702 /* uv_num_possible_blades() is really the hub count: */
1703 pr_info("UV: Found %d hubs, %d nodes, %d CPUs\n", uv_num_possible_blades(), num_possible_nodes(), num_possible_cpus());
1704
1705 uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id, &sn_region_size, &system_serial_number);
1706 hub_info.coherency_domain_number = sn_coherency_id;
1707 uv_rtc_init();
1708
1709 bytes = sizeof(void *) * uv_num_possible_blades();
1710 __uv_hub_info_list = kzalloc(bytes, GFP_KERNEL);
1711 BUG_ON(!__uv_hub_info_list);
1712
1713 bytes = sizeof(struct uv_hub_info_s);
1714 for_each_node(nodeid) {
1715 struct uv_hub_info_s *new_hub;
1716
1717 if (__uv_hub_info_list[nodeid]) {
1718 pr_err("UV: Node %d UV HUB already initialized!?\n", nodeid);
1719 BUG();
1720 }
1721
1722 /* Allocate new per hub info list */
1723 new_hub = (nodeid == 0) ? &uv_hub_info_node0 : kzalloc_node(bytes, GFP_KERNEL, nodeid);
1724 BUG_ON(!new_hub);
1725 __uv_hub_info_list[nodeid] = new_hub;
1726 new_hub = uv_hub_info_list(nodeid);
1727 BUG_ON(!new_hub);
1728 *new_hub = hub_info;
1729
1730 /* Use information from GAM table if available: */
1731 if (_node_to_pnode)
1732 new_hub->pnode = _node_to_pnode[nodeid];
1733 else /* Or fill in during CPU loop: */
1734 new_hub->pnode = 0xffff;
1735
1736 new_hub->numa_blade_id = uv_node_to_blade_id(nodeid);
1737 new_hub->memory_nid = NUMA_NO_NODE;
1738 new_hub->nr_possible_cpus = 0;
1739 new_hub->nr_online_cpus = 0;
1740 }
1741
1742 /* Initialize per CPU info: */
1743 for_each_possible_cpu(cpu) {
1744 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
1745 int numa_node_id;
1746 unsigned short pnode;
1747
1748 nodeid = cpu_to_node(cpu);
1749 numa_node_id = numa_cpu_node(cpu);
1750 pnode = uv_apicid_to_pnode(apicid);
1751
1752 uv_cpu_info_per(cpu)->p_uv_hub_info = uv_hub_info_list(nodeid);
1753 uv_cpu_info_per(cpu)->blade_cpu_id = uv_cpu_hub_info(cpu)->nr_possible_cpus++;
1754 if (uv_cpu_hub_info(cpu)->memory_nid == NUMA_NO_NODE)
1755 uv_cpu_hub_info(cpu)->memory_nid = cpu_to_node(cpu);
1756
1757 /* Init memoryless node: */
1758 if (nodeid != numa_node_id &&
1759 uv_hub_info_list(numa_node_id)->pnode == 0xffff)
1760 uv_hub_info_list(numa_node_id)->pnode = pnode;
1761 else if (uv_cpu_hub_info(cpu)->pnode == 0xffff)
1762 uv_cpu_hub_info(cpu)->pnode = pnode;
1763 }
1764
1765 for_each_node(nodeid) {
1766 unsigned short pnode = uv_hub_info_list(nodeid)->pnode;
1767
1768 /* Add pnode info for pre-GAM list nodes without CPUs: */
1769 if (pnode == 0xffff) {
1770 unsigned long paddr;
1771
1772 paddr = node_start_pfn(nodeid) << PAGE_SHIFT;
1773 pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr));
1774 uv_hub_info_list(nodeid)->pnode = pnode;
1775 }
1776 min_pnode = min(pnode, min_pnode);
1777 max_pnode = max(pnode, max_pnode);
1778 pr_info("UV: UVHUB node:%2d pn:%02x nrcpus:%d\n",
1779 nodeid,
1780 uv_hub_info_list(nodeid)->pnode,
1781 uv_hub_info_list(nodeid)->nr_possible_cpus);
1782 }
1783
1784 pr_info("UV: min_pnode:%02x max_pnode:%02x\n", min_pnode, max_pnode);
1785 map_gru_high(max_pnode);
1786 map_mmr_high(max_pnode);
1787 map_mmioh_high(min_pnode, max_pnode);
1788
1789 uv_nmi_setup();
1790 uv_cpu_init();
1791 uv_setup_proc_files(0);
1792
1793 /* Register Legacy VGA I/O redirection handler: */
1794 pci_register_set_vga_state(uv_set_vga_state);
1795
1796 check_efi_reboot();
1797 }
1798
1799 /*
1800 * There is a different code path needed to initialize a UV system that does
1801 * not have a "UV HUB" (referred to as "hubless").
1802 */
uv_system_init(void)1803 void __init uv_system_init(void)
1804 {
1805 if (likely(!is_uv_system() && !is_uv_hubless(1)))
1806 return;
1807
1808 if (is_uv_system())
1809 uv_system_init_hub();
1810 else
1811 uv_system_init_hubless();
1812 }
1813
1814 apic_driver(apic_x2apic_uv_x);
1815