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drm/panthor: Don't add write fences to the shared BOs
[drm/drm-misc.git] / arch / x86 / kernel / apic / x2apic_uv_x.c
blob7fef504ca508b7829b89a3ca2dad9be1e22860e9
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 static void __init early_get_apic_socketid_shift(void)
245 {
246 unsigned int sid_shift = topology_get_domain_shift(TOPO_PKG_DOMAIN);
247
248 if (is_uv2_hub() || is_uv3_hub())
249 uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
250
251 if (sid_shift) {
252 uv_cpuid.apicid_shift = 0;
253 uv_cpuid.apicid_mask = (~(-1 << sid_shift));
254 uv_cpuid.socketid_shift = sid_shift;
255 } else {
256 pr_info("UV: CPU does not have valid CPUID.11\n");
257 }
258
259 pr_info("UV: apicid_shift:%d apicid_mask:0x%x\n", uv_cpuid.apicid_shift, uv_cpuid.apicid_mask);
260 pr_info("UV: socketid_shift:%d pnode_mask:0x%x\n", uv_cpuid.socketid_shift, uv_cpuid.pnode_mask);
261 }
262
263 static void __init uv_stringify(int len, char *to, char *from)
264 {
265 strscpy(to, from, len);
266
267 /* Trim trailing spaces */
268 (void)strim(to);
269 }
270
271 /* Find UV arch type entry in UVsystab */
272 static unsigned long __init early_find_archtype(struct uv_systab *st)
273 {
274 int i;
275
276 for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
277 unsigned long ptr = st->entry[i].offset;
278
279 if (!ptr)
280 continue;
281 ptr += (unsigned long)st;
282 if (st->entry[i].type == UV_SYSTAB_TYPE_ARCH_TYPE)
283 return ptr;
284 }
285 return 0;
286 }
287
288 /* Validate UV arch type field in UVsystab */
289 static int __init decode_arch_type(unsigned long ptr)
290 {
291 struct uv_arch_type_entry *uv_ate = (struct uv_arch_type_entry *)ptr;
292 int n = strlen(uv_ate->archtype);
293
294 if (n > 0 && n < sizeof(uv_ate->archtype)) {
295 pr_info("UV: UVarchtype received from BIOS\n");
296 uv_stringify(sizeof(uv_archtype), uv_archtype, uv_ate->archtype);
297 return 1;
298 }
299 return 0;
300 }
301
302 /* Determine if UV arch type entry might exist in UVsystab */
303 static int __init early_get_arch_type(void)
304 {
305 unsigned long uvst_physaddr, uvst_size, ptr;
306 struct uv_systab *st;
307 u32 rev;
308 int ret;
309
310 uvst_physaddr = get_uv_systab_phys(0);
311 if (!uvst_physaddr)
312 return 0;
313
314 st = early_memremap_ro(uvst_physaddr, sizeof(struct uv_systab));
315 if (!st) {
316 pr_err("UV: Cannot access UVsystab, remap failed\n");
317 return 0;
318 }
319
320 rev = st->revision;
321 if (rev < UV_SYSTAB_VERSION_UV5) {
322 early_memunmap(st, sizeof(struct uv_systab));
323 return 0;
324 }
325
326 uvst_size = st->size;
327 early_memunmap(st, sizeof(struct uv_systab));
328 st = early_memremap_ro(uvst_physaddr, uvst_size);
329 if (!st) {
330 pr_err("UV: Cannot access UVarchtype, remap failed\n");
331 return 0;
332 }
333
334 ptr = early_find_archtype(st);
335 if (!ptr) {
336 early_memunmap(st, uvst_size);
337 return 0;
338 }
339
340 ret = decode_arch_type(ptr);
341 early_memunmap(st, uvst_size);
342 return ret;
343 }
344
345 /* UV system found, check which APIC MODE BIOS already selected */
346 static void __init early_set_apic_mode(void)
347 {
348 if (x2apic_enabled())
349 uv_system_type = UV_X2APIC;
350 else
351 uv_system_type = UV_LEGACY_APIC;
352 }
353
354 static int __init uv_set_system_type(char *_oem_id, char *_oem_table_id)
355 {
356 /* Save OEM_ID passed from ACPI MADT */
357 uv_stringify(sizeof(oem_id), oem_id, _oem_id);
358
359 /* Check if BIOS sent us a UVarchtype */
360 if (!early_get_arch_type())
361
362 /* If not use OEM ID for UVarchtype */
363 uv_stringify(sizeof(uv_archtype), uv_archtype, oem_id);
364
365 /* Check if not hubbed */
366 if (strncmp(uv_archtype, "SGI", 3) != 0) {
367
368 /* (Not hubbed), check if not hubless */
369 if (strncmp(uv_archtype, "NSGI", 4) != 0)
370
371 /* (Not hubless), not a UV */
372 return 0;
373
374 /* Is UV hubless system */
375 uv_hubless_system = 0x01;
376
377 /* UV5 Hubless */
378 if (strncmp(uv_archtype, "NSGI5", 5) == 0)
379 uv_hubless_system |= 0x20;
380
381 /* UV4 Hubless: CH */
382 else if (strncmp(uv_archtype, "NSGI4", 5) == 0)
383 uv_hubless_system |= 0x10;
384
385 /* UV3 Hubless: UV300/MC990X w/o hub */
386 else
387 uv_hubless_system |= 0x8;
388
389 /* Copy OEM Table ID */
390 uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id);
391
392 pr_info("UV: OEM IDs %s/%s, SystemType %d, HUBLESS ID %x\n",
393 oem_id, oem_table_id, uv_system_type, uv_hubless_system);
394
395 return 0;
396 }
397
398 if (numa_off) {
399 pr_err("UV: NUMA is off, disabling UV support\n");
400 return 0;
401 }
402
403 /* Set hubbed type if true */
404 uv_hub_info->hub_revision =
405 !strncmp(uv_archtype, "SGI5", 4) ? UV5_HUB_REVISION_BASE :
406 !strncmp(uv_archtype, "SGI4", 4) ? UV4_HUB_REVISION_BASE :
407 !strncmp(uv_archtype, "SGI3", 4) ? UV3_HUB_REVISION_BASE :
408 !strcmp(uv_archtype, "SGI2") ? UV2_HUB_REVISION_BASE : 0;
409
410 switch (uv_hub_info->hub_revision) {
411 case UV5_HUB_REVISION_BASE:
412 uv_hubbed_system = 0x21;
413 uv_hub_type_set(UV5);
414 break;
415
416 case UV4_HUB_REVISION_BASE:
417 uv_hubbed_system = 0x11;
418 uv_hub_type_set(UV4);
419 break;
420
421 case UV3_HUB_REVISION_BASE:
422 uv_hubbed_system = 0x9;
423 uv_hub_type_set(UV3);
424 break;
425
426 case UV2_HUB_REVISION_BASE:
427 uv_hubbed_system = 0x5;
428 uv_hub_type_set(UV2);
429 break;
430
431 default:
432 return 0;
433 }
434
435 /* Get UV hub chip part number & revision */
436 early_set_hub_type();
437
438 /* Other UV setup functions */
439 early_set_apic_mode();
440 early_get_pnodeid();
441 early_get_apic_socketid_shift();
442 x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
443 x86_platform.nmi_init = uv_nmi_init;
444 uv_tsc_check_sync();
445
446 return 1;
447 }
448
449 /* Called early to probe for the correct APIC driver */
450 static int __init uv_acpi_madt_oem_check(char *_oem_id, char *_oem_table_id)
451 {
452 /* Set up early hub info fields for Node 0 */
453 uv_cpu_info->p_uv_hub_info = &uv_hub_info_node0;
454
455 /* If not UV, return. */
456 if (uv_set_system_type(_oem_id, _oem_table_id) == 0)
457 return 0;
458
459 /* Save for display of the OEM Table ID */
460 uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id);
461
462 pr_info("UV: OEM IDs %s/%s, System/UVType %d/0x%x, HUB RevID %d\n",
463 oem_id, oem_table_id, uv_system_type, is_uv(UV_ANY),
464 uv_min_hub_revision_id);
465
466 return 0;
467 }
468
469 enum uv_system_type get_uv_system_type(void)
470 {
471 return uv_system_type;
472 }
473
474 int uv_get_hubless_system(void)
475 {
476 return uv_hubless_system;
477 }
478 EXPORT_SYMBOL_GPL(uv_get_hubless_system);
479
480 ssize_t uv_get_archtype(char *buf, int len)
481 {
482 return scnprintf(buf, len, "%s/%s", uv_archtype, oem_table_id);
483 }
484 EXPORT_SYMBOL_GPL(uv_get_archtype);
485
486 int is_uv_system(void)
487 {
488 return uv_system_type != UV_NONE;
489 }
490 EXPORT_SYMBOL_GPL(is_uv_system);
491
492 int is_uv_hubbed(int uvtype)
493 {
494 return (uv_hubbed_system & uvtype);
495 }
496 EXPORT_SYMBOL_GPL(is_uv_hubbed);
497
498 static int is_uv_hubless(int uvtype)
499 {
500 return (uv_hubless_system & uvtype);
501 }
502
503 void **__uv_hub_info_list;
504 EXPORT_SYMBOL_GPL(__uv_hub_info_list);
505
506 DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
507 EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info);
508
509 short uv_possible_blades;
510 EXPORT_SYMBOL_GPL(uv_possible_blades);
511
512 unsigned long sn_rtc_cycles_per_second;
513 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
514
515 /* The following values are used for the per node hub info struct */
516 static __initdata unsigned short _min_socket, _max_socket;
517 static __initdata unsigned short _min_pnode, _max_pnode, _gr_table_len;
518 static __initdata struct uv_gam_range_entry *uv_gre_table;
519 static __initdata struct uv_gam_parameters *uv_gp_table;
520 static __initdata unsigned short *_socket_to_node;
521 static __initdata unsigned short *_socket_to_pnode;
522 static __initdata unsigned short *_pnode_to_socket;
523 static __initdata unsigned short *_node_to_socket;
524
525 static __initdata struct uv_gam_range_s *_gr_table;
526
527 #define SOCK_EMPTY ((unsigned short)~0)
528
529 /* Default UV memory block size is 2GB */
530 static unsigned long mem_block_size __initdata = (2UL << 30);
531
532 /* Kernel parameter to specify UV mem block size */
533 static int __init parse_mem_block_size(char *ptr)
534 {
535 unsigned long size = memparse(ptr, NULL);
536
537 /* Size will be rounded down by set_block_size() below */
538 mem_block_size = size;
539 return 0;
540 }
541 early_param("uv_memblksize", parse_mem_block_size);
542
543 static __init int adj_blksize(u32 lgre)
544 {
545 unsigned long base = (unsigned long)lgre << UV_GAM_RANGE_SHFT;
546 unsigned long size;
547
548 for (size = mem_block_size; size > MIN_MEMORY_BLOCK_SIZE; size >>= 1)
549 if (IS_ALIGNED(base, size))
550 break;
551
552 if (size >= mem_block_size)
553 return 0;
554
555 mem_block_size = size;
556 return 1;
557 }
558
559 static __init void set_block_size(void)
560 {
561 unsigned int order = ffs(mem_block_size);
562
563 if (order) {
564 /* adjust for ffs return of 1..64 */
565 set_memory_block_size_order(order - 1);
566 pr_info("UV: mem_block_size set to 0x%lx\n", mem_block_size);
567 } else {
568 /* bad or zero value, default to 1UL << 31 (2GB) */
569 pr_err("UV: mem_block_size error with 0x%lx\n", mem_block_size);
570 set_memory_block_size_order(31);
571 }
572 }
573
574 /* Build GAM range lookup table: */
575 static __init void build_uv_gr_table(void)
576 {
577 struct uv_gam_range_entry *gre = uv_gre_table;
578 struct uv_gam_range_s *grt;
579 unsigned long last_limit = 0, ram_limit = 0;
580 int bytes, i, sid, lsid = -1, indx = 0, lindx = -1;
581
582 if (!gre)
583 return;
584
585 bytes = _gr_table_len * sizeof(struct uv_gam_range_s);
586 grt = kzalloc(bytes, GFP_KERNEL);
587 if (WARN_ON_ONCE(!grt))
588 return;
589 _gr_table = grt;
590
591 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
592 if (gre->type == UV_GAM_RANGE_TYPE_HOLE) {
593 if (!ram_limit) {
594 /* Mark hole between RAM/non-RAM: */
595 ram_limit = last_limit;
596 last_limit = gre->limit;
597 lsid++;
598 continue;
599 }
600 last_limit = gre->limit;
601 pr_info("UV: extra hole in GAM RE table @%d\n", (int)(gre - uv_gre_table));
602 continue;
603 }
604 if (_max_socket < gre->sockid) {
605 pr_err("UV: GAM table sockid(%d) too large(>%d) @%d\n", gre->sockid, _max_socket, (int)(gre - uv_gre_table));
606 continue;
607 }
608 sid = gre->sockid - _min_socket;
609 if (lsid < sid) {
610 /* New range: */
611 grt = &_gr_table[indx];
612 grt->base = lindx;
613 grt->nasid = gre->nasid;
614 grt->limit = last_limit = gre->limit;
615 lsid = sid;
616 lindx = indx++;
617 continue;
618 }
619 /* Update range: */
620 if (lsid == sid && !ram_limit) {
621 /* .. if contiguous: */
622 if (grt->limit == last_limit) {
623 grt->limit = last_limit = gre->limit;
624 continue;
625 }
626 }
627 /* Non-contiguous RAM range: */
628 if (!ram_limit) {
629 grt++;
630 grt->base = lindx;
631 grt->nasid = gre->nasid;
632 grt->limit = last_limit = gre->limit;
633 continue;
634 }
635 /* Non-contiguous/non-RAM: */
636 grt++;
637 /* base is this entry */
638 grt->base = grt - _gr_table;
639 grt->nasid = gre->nasid;
640 grt->limit = last_limit = gre->limit;
641 lsid++;
642 }
643
644 /* Shorten table if possible */
645 grt++;
646 i = grt - _gr_table;
647 if (i < _gr_table_len) {
648 void *ret;
649
650 bytes = i * sizeof(struct uv_gam_range_s);
651 ret = krealloc(_gr_table, bytes, GFP_KERNEL);
652 if (ret) {
653 _gr_table = ret;
654 _gr_table_len = i;
655 }
656 }
657
658 /* Display resultant GAM range table: */
659 for (i = 0, grt = _gr_table; i < _gr_table_len; i++, grt++) {
660 unsigned long start, end;
661 int gb = grt->base;
662
663 start = gb < 0 ? 0 : (unsigned long)_gr_table[gb].limit << UV_GAM_RANGE_SHFT;
664 end = (unsigned long)grt->limit << UV_GAM_RANGE_SHFT;
665
666 pr_info("UV: GAM Range %2d %04x 0x%013lx-0x%013lx (%d)\n", i, grt->nasid, start, end, gb);
667 }
668 }
669
670 static int uv_wakeup_secondary(u32 phys_apicid, unsigned long start_rip)
671 {
672 unsigned long val;
673 int pnode;
674
675 pnode = uv_apicid_to_pnode(phys_apicid);
676
677 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
678 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
679 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
680 APIC_DM_INIT;
681
682 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
683
684 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
685 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
686 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
687 APIC_DM_STARTUP;
688
689 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
690
691 return 0;
692 }
693
694 static void uv_send_IPI_one(int cpu, int vector)
695 {
696 unsigned long apicid = per_cpu(x86_cpu_to_apicid, cpu);
697 int pnode = uv_apicid_to_pnode(apicid);
698 unsigned long dmode, val;
699
700 if (vector == NMI_VECTOR)
701 dmode = APIC_DELIVERY_MODE_NMI;
702 else
703 dmode = APIC_DELIVERY_MODE_FIXED;
704
705 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
706 (apicid << UVH_IPI_INT_APIC_ID_SHFT) |
707 (dmode << UVH_IPI_INT_DELIVERY_MODE_SHFT) |
708 (vector << UVH_IPI_INT_VECTOR_SHFT);
709
710 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
711 }
712
713 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
714 {
715 unsigned int cpu;
716
717 for_each_cpu(cpu, mask)
718 uv_send_IPI_one(cpu, vector);
719 }
720
721 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
722 {
723 unsigned int this_cpu = smp_processor_id();
724 unsigned int cpu;
725
726 for_each_cpu(cpu, mask) {
727 if (cpu != this_cpu)
728 uv_send_IPI_one(cpu, vector);
729 }
730 }
731
732 static void uv_send_IPI_allbutself(int vector)
733 {
734 unsigned int this_cpu = smp_processor_id();
735 unsigned int cpu;
736
737 for_each_online_cpu(cpu) {
738 if (cpu != this_cpu)
739 uv_send_IPI_one(cpu, vector);
740 }
741 }
742
743 static void uv_send_IPI_all(int vector)
744 {
745 uv_send_IPI_mask(cpu_online_mask, vector);
746 }
747
748 static int uv_probe(void)
749 {
750 return apic == &apic_x2apic_uv_x;
751 }
752
753 static struct apic apic_x2apic_uv_x __ro_after_init = {
754
755 .name = "UV large system",
756 .probe = uv_probe,
757 .acpi_madt_oem_check = uv_acpi_madt_oem_check,
758
759 .dest_mode_logical = false,
760
761 .disable_esr = 0,
762
763 .cpu_present_to_apicid = default_cpu_present_to_apicid,
764
765 .max_apic_id = UINT_MAX,
766 .get_apic_id = x2apic_get_apic_id,
767
768 .calc_dest_apicid = apic_default_calc_apicid,
769
770 .send_IPI = uv_send_IPI_one,
771 .send_IPI_mask = uv_send_IPI_mask,
772 .send_IPI_mask_allbutself = uv_send_IPI_mask_allbutself,
773 .send_IPI_allbutself = uv_send_IPI_allbutself,
774 .send_IPI_all = uv_send_IPI_all,
775 .send_IPI_self = x2apic_send_IPI_self,
776
777 .wakeup_secondary_cpu = uv_wakeup_secondary,
778
779 .read = native_apic_msr_read,
780 .write = native_apic_msr_write,
781 .eoi = native_apic_msr_eoi,
782 .icr_read = native_x2apic_icr_read,
783 .icr_write = native_x2apic_icr_write,
784 };
785
786 #define UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH 3
787 #define DEST_SHIFT UVXH_RH_GAM_ALIAS_0_REDIRECT_CONFIG_DEST_BASE_SHFT
788
789 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
790 {
791 union uvh_rh_gam_alias_2_overlay_config_u alias;
792 union uvh_rh_gam_alias_2_redirect_config_u redirect;
793 unsigned long m_redirect;
794 unsigned long m_overlay;
795 int i;
796
797 for (i = 0; i < UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH; i++) {
798 switch (i) {
799 case 0:
800 m_redirect = UVH_RH_GAM_ALIAS_0_REDIRECT_CONFIG;
801 m_overlay = UVH_RH_GAM_ALIAS_0_OVERLAY_CONFIG;
802 break;
803 case 1:
804 m_redirect = UVH_RH_GAM_ALIAS_1_REDIRECT_CONFIG;
805 m_overlay = UVH_RH_GAM_ALIAS_1_OVERLAY_CONFIG;
806 break;
807 case 2:
808 m_redirect = UVH_RH_GAM_ALIAS_2_REDIRECT_CONFIG;
809 m_overlay = UVH_RH_GAM_ALIAS_2_OVERLAY_CONFIG;
810 break;
811 }
812 alias.v = uv_read_local_mmr(m_overlay);
813 if (alias.s.enable && alias.s.base == 0) {
814 *size = (1UL << alias.s.m_alias);
815 redirect.v = uv_read_local_mmr(m_redirect);
816 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
817 return;
818 }
819 }
820 *base = *size = 0;
821 }
822
823 enum map_type {map_wb, map_uc};
824 static const char * const mt[] = { "WB", "UC" };
825
826 static __init void map_high(char *id, unsigned long base, int pshift, int bshift, int max_pnode, enum map_type map_type)
827 {
828 unsigned long bytes, paddr;
829
830 paddr = base << pshift;
831 bytes = (1UL << bshift) * (max_pnode + 1);
832 if (!paddr) {
833 pr_info("UV: Map %s_HI base address NULL\n", id);
834 return;
835 }
836 if (map_type == map_uc)
837 init_extra_mapping_uc(paddr, bytes);
838 else
839 init_extra_mapping_wb(paddr, bytes);
840
841 pr_info("UV: Map %s_HI 0x%lx - 0x%lx %s (%d segments)\n",
842 id, paddr, paddr + bytes, mt[map_type], max_pnode + 1);
843 }
844
845 static __init void map_gru_high(int max_pnode)
846 {
847 union uvh_rh_gam_gru_overlay_config_u gru;
848 unsigned long mask, base;
849 int shift;
850
851 if (UVH_RH_GAM_GRU_OVERLAY_CONFIG) {
852 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG);
853 shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
854 mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
855 } else if (UVH_RH10_GAM_GRU_OVERLAY_CONFIG) {
856 gru.v = uv_read_local_mmr(UVH_RH10_GAM_GRU_OVERLAY_CONFIG);
857 shift = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
858 mask = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
859 } else {
860 pr_err("UV: GRU unavailable (no MMR)\n");
861 return;
862 }
863
864 if (!gru.s.enable) {
865 pr_info("UV: GRU disabled (by BIOS)\n");
866 return;
867 }
868
869 base = (gru.v & mask) >> shift;
870 map_high("GRU", base, shift, shift, max_pnode, map_wb);
871 gru_start_paddr = ((u64)base << shift);
872 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
873 }
874
875 static __init void map_mmr_high(int max_pnode)
876 {
877 unsigned long base;
878 int shift;
879 bool enable;
880
881 if (UVH_RH10_GAM_MMR_OVERLAY_CONFIG) {
882 union uvh_rh10_gam_mmr_overlay_config_u mmr;
883
884 mmr.v = uv_read_local_mmr(UVH_RH10_GAM_MMR_OVERLAY_CONFIG);
885 enable = mmr.s.enable;
886 base = mmr.s.base;
887 shift = UVH_RH10_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
888 } else if (UVH_RH_GAM_MMR_OVERLAY_CONFIG) {
889 union uvh_rh_gam_mmr_overlay_config_u mmr;
890
891 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG);
892 enable = mmr.s.enable;
893 base = mmr.s.base;
894 shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
895 } else {
896 pr_err("UV:%s:RH_GAM_MMR_OVERLAY_CONFIG MMR undefined?\n",
897 __func__);
898 return;
899 }
900
901 if (enable)
902 map_high("MMR", base, shift, shift, max_pnode, map_uc);
903 else
904 pr_info("UV: MMR disabled\n");
905 }
906
907 /* Arch specific ENUM cases */
908 enum mmioh_arch {
909 UV2_MMIOH = -1,
910 UVY_MMIOH0, UVY_MMIOH1,
911 UVX_MMIOH0, UVX_MMIOH1,
912 };
913
914 /* Calculate and Map MMIOH Regions */
915 static void __init calc_mmioh_map(enum mmioh_arch index,
916 int min_pnode, int max_pnode,
917 int shift, unsigned long base, int m_io, int n_io)
918 {
919 unsigned long mmr, nasid_mask;
920 int nasid, min_nasid, max_nasid, lnasid, mapped;
921 int i, fi, li, n, max_io;
922 char id[8];
923
924 /* One (UV2) mapping */
925 if (index == UV2_MMIOH) {
926 strscpy(id, "MMIOH", sizeof(id));
927 max_io = max_pnode;
928 mapped = 0;
929 goto map_exit;
930 }
931
932 /* small and large MMIOH mappings */
933 switch (index) {
934 case UVY_MMIOH0:
935 mmr = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG0;
936 nasid_mask = UVYH_RH10_GAM_MMIOH_REDIRECT_CONFIG0_NASID_MASK;
937 n = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG0_DEPTH;
938 min_nasid = min_pnode;
939 max_nasid = max_pnode;
940 mapped = 1;
941 break;
942 case UVY_MMIOH1:
943 mmr = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG1;
944 nasid_mask = UVYH_RH10_GAM_MMIOH_REDIRECT_CONFIG1_NASID_MASK;
945 n = UVH_RH10_GAM_MMIOH_REDIRECT_CONFIG1_DEPTH;
946 min_nasid = min_pnode;
947 max_nasid = max_pnode;
948 mapped = 1;
949 break;
950 case UVX_MMIOH0:
951 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0;
952 nasid_mask = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_NASID_MASK;
953 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_DEPTH;
954 min_nasid = min_pnode * 2;
955 max_nasid = max_pnode * 2;
956 mapped = 1;
957 break;
958 case UVX_MMIOH1:
959 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1;
960 nasid_mask = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_NASID_MASK;
961 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_DEPTH;
962 min_nasid = min_pnode * 2;
963 max_nasid = max_pnode * 2;
964 mapped = 1;
965 break;
966 default:
967 pr_err("UV:%s:Invalid mapping type:%d\n", __func__, index);
968 return;
969 }
970
971 /* enum values chosen so (index mod 2) is MMIOH 0/1 (low/high) */
972 snprintf(id, sizeof(id), "MMIOH%d", index%2);
973
974 max_io = lnasid = fi = li = -1;
975 for (i = 0; i < n; i++) {
976 unsigned long m_redirect = mmr + i * 8;
977 unsigned long redirect = uv_read_local_mmr(m_redirect);
978
979 nasid = redirect & nasid_mask;
980 if (i == 0)
981 pr_info("UV: %s redirect base 0x%lx(@0x%lx) 0x%04x\n",
982 id, redirect, m_redirect, nasid);
983
984 /* Invalid NASID check */
985 if (nasid < min_nasid || max_nasid < nasid) {
986 /* Not an error: unused table entries get "poison" values */
987 pr_debug("UV:%s:Invalid NASID(%x):%x (range:%x..%x)\n",
988 __func__, index, nasid, min_nasid, max_nasid);
989 nasid = -1;
990 }
991
992 if (nasid == lnasid) {
993 li = i;
994 /* Last entry check: */
995 if (i != n-1)
996 continue;
997 }
998
999 /* Check if we have a cached (or last) redirect to print: */
1000 if (lnasid != -1 || (i == n-1 && nasid != -1)) {
1001 unsigned long addr1, addr2;
1002 int f, l;
1003
1004 if (lnasid == -1) {
1005 f = l = i;
1006 lnasid = nasid;
1007 } else {
1008 f = fi;
1009 l = li;
1010 }
1011 addr1 = (base << shift) + f * (1ULL << m_io);
1012 addr2 = (base << shift) + (l + 1) * (1ULL << m_io);
1013 pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n",
1014 id, fi, li, lnasid, addr1, addr2);
1015 if (max_io < l)
1016 max_io = l;
1017 }
1018 fi = li = i;
1019 lnasid = nasid;
1020 }
1021
1022 map_exit:
1023 pr_info("UV: %s base:0x%lx shift:%d m_io:%d max_io:%d max_pnode:0x%x\n",
1024 id, base, shift, m_io, max_io, max_pnode);
1025
1026 if (max_io >= 0 && !mapped)
1027 map_high(id, base, shift, m_io, max_io, map_uc);
1028 }
1029
1030 static __init void map_mmioh_high(int min_pnode, int max_pnode)
1031 {
1032 /* UVY flavor */
1033 if (UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0) {
1034 union uvh_rh10_gam_mmioh_overlay_config0_u mmioh0;
1035 union uvh_rh10_gam_mmioh_overlay_config1_u mmioh1;
1036
1037 mmioh0.v = uv_read_local_mmr(UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0);
1038 if (unlikely(mmioh0.s.enable == 0))
1039 pr_info("UV: MMIOH0 disabled\n");
1040 else
1041 calc_mmioh_map(UVY_MMIOH0, min_pnode, max_pnode,
1042 UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG0_BASE_SHFT,
1043 mmioh0.s.base, mmioh0.s.m_io, mmioh0.s.n_io);
1044
1045 mmioh1.v = uv_read_local_mmr(UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1);
1046 if (unlikely(mmioh1.s.enable == 0))
1047 pr_info("UV: MMIOH1 disabled\n");
1048 else
1049 calc_mmioh_map(UVY_MMIOH1, min_pnode, max_pnode,
1050 UVH_RH10_GAM_MMIOH_OVERLAY_CONFIG1_BASE_SHFT,
1051 mmioh1.s.base, mmioh1.s.m_io, mmioh1.s.n_io);
1052 return;
1053 }
1054 /* UVX flavor */
1055 if (UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0) {
1056 union uvh_rh_gam_mmioh_overlay_config0_u mmioh0;
1057 union uvh_rh_gam_mmioh_overlay_config1_u mmioh1;
1058
1059 mmioh0.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0);
1060 if (unlikely(mmioh0.s.enable == 0))
1061 pr_info("UV: MMIOH0 disabled\n");
1062 else {
1063 unsigned long base = uvxy_field(mmioh0, base, 0);
1064 int m_io = uvxy_field(mmioh0, m_io, 0);
1065 int n_io = uvxy_field(mmioh0, n_io, 0);
1066
1067 calc_mmioh_map(UVX_MMIOH0, min_pnode, max_pnode,
1068 UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_BASE_SHFT,
1069 base, m_io, n_io);
1070 }
1071
1072 mmioh1.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1);
1073 if (unlikely(mmioh1.s.enable == 0))
1074 pr_info("UV: MMIOH1 disabled\n");
1075 else {
1076 unsigned long base = uvxy_field(mmioh1, base, 0);
1077 int m_io = uvxy_field(mmioh1, m_io, 0);
1078 int n_io = uvxy_field(mmioh1, n_io, 0);
1079
1080 calc_mmioh_map(UVX_MMIOH1, min_pnode, max_pnode,
1081 UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_BASE_SHFT,
1082 base, m_io, n_io);
1083 }
1084 return;
1085 }
1086
1087 /* UV2 flavor */
1088 if (UVH_RH_GAM_MMIOH_OVERLAY_CONFIG) {
1089 union uvh_rh_gam_mmioh_overlay_config_u mmioh;
1090
1091 mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG);
1092 if (unlikely(mmioh.s2.enable == 0))
1093 pr_info("UV: MMIOH disabled\n");
1094 else
1095 calc_mmioh_map(UV2_MMIOH, min_pnode, max_pnode,
1096 UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_BASE_SHFT,
1097 mmioh.s2.base, mmioh.s2.m_io, mmioh.s2.n_io);
1098 return;
1099 }
1100 }
1101
1102 static __init void map_low_mmrs(void)
1103 {
1104 if (UV_GLOBAL_MMR32_BASE)
1105 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
1106
1107 if (UV_LOCAL_MMR_BASE)
1108 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
1109 }
1110
1111 static __init void uv_rtc_init(void)
1112 {
1113 long status;
1114 u64 ticks_per_sec;
1115
1116 status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec);
1117
1118 if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
1119 pr_warn("UV: unable to determine platform RTC clock frequency, guessing.\n");
1120
1121 /* BIOS gives wrong value for clock frequency, so guess: */
1122 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
1123 } else {
1124 sn_rtc_cycles_per_second = ticks_per_sec;
1125 }
1126 }
1127
1128 /* Direct Legacy VGA I/O traffic to designated IOH */
1129 static int uv_set_vga_state(struct pci_dev *pdev, bool decode, unsigned int command_bits, u32 flags)
1130 {
1131 int domain, bus, rc;
1132
1133 if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
1134 return 0;
1135
1136 if ((command_bits & PCI_COMMAND_IO) == 0)
1137 return 0;
1138
1139 domain = pci_domain_nr(pdev->bus);
1140 bus = pdev->bus->number;
1141
1142 rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
1143
1144 return rc;
1145 }
1146
1147 /*
1148 * Called on each CPU to initialize the per_cpu UV data area.
1149 * FIXME: hotplug not supported yet
1150 */
1151 void uv_cpu_init(void)
1152 {
1153 /* CPU 0 initialization will be done via uv_system_init. */
1154 if (smp_processor_id() == 0)
1155 return;
1156
1157 uv_hub_info->nr_online_cpus++;
1158 }
1159
1160 struct mn {
1161 unsigned char m_val;
1162 unsigned char n_val;
1163 unsigned char m_shift;
1164 unsigned char n_lshift;
1165 };
1166
1167 /* Initialize caller's MN struct and fill in values */
1168 static void get_mn(struct mn *mnp)
1169 {
1170 memset(mnp, 0, sizeof(*mnp));
1171 mnp->n_val = uv_cpuid.n_skt;
1172 if (is_uv(UV4|UVY)) {
1173 mnp->m_val = 0;
1174 mnp->n_lshift = 0;
1175 } else if (is_uv3_hub()) {
1176 union uvyh_gr0_gam_gr_config_u m_gr_config;
1177
1178 mnp->m_val = uv_cpuid.m_skt;
1179 m_gr_config.v = uv_read_local_mmr(UVH_GR0_GAM_GR_CONFIG);
1180 mnp->n_lshift = m_gr_config.s3.m_skt;
1181 } else if (is_uv2_hub()) {
1182 mnp->m_val = uv_cpuid.m_skt;
1183 mnp->n_lshift = mnp->m_val == 40 ? 40 : 39;
1184 }
1185 mnp->m_shift = mnp->m_val ? 64 - mnp->m_val : 0;
1186 }
1187
1188 static void __init uv_init_hub_info(struct uv_hub_info_s *hi)
1189 {
1190 struct mn mn;
1191
1192 get_mn(&mn);
1193 hi->gpa_mask = mn.m_val ?
1194 (1UL << (mn.m_val + mn.n_val)) - 1 :
1195 (1UL << uv_cpuid.gpa_shift) - 1;
1196
1197 hi->m_val = mn.m_val;
1198 hi->n_val = mn.n_val;
1199 hi->m_shift = mn.m_shift;
1200 hi->n_lshift = mn.n_lshift ? mn.n_lshift : 0;
1201 hi->hub_revision = uv_hub_info->hub_revision;
1202 hi->hub_type = uv_hub_info->hub_type;
1203 hi->pnode_mask = uv_cpuid.pnode_mask;
1204 hi->nasid_shift = uv_cpuid.nasid_shift;
1205 hi->min_pnode = _min_pnode;
1206 hi->min_socket = _min_socket;
1207 hi->node_to_socket = _node_to_socket;
1208 hi->pnode_to_socket = _pnode_to_socket;
1209 hi->socket_to_node = _socket_to_node;
1210 hi->socket_to_pnode = _socket_to_pnode;
1211 hi->gr_table_len = _gr_table_len;
1212 hi->gr_table = _gr_table;
1213
1214 uv_cpuid.gnode_shift = max_t(unsigned int, uv_cpuid.gnode_shift, mn.n_val);
1215 hi->gnode_extra = (uv_node_id & ~((1 << uv_cpuid.gnode_shift) - 1)) >> 1;
1216 if (mn.m_val)
1217 hi->gnode_upper = (u64)hi->gnode_extra << mn.m_val;
1218
1219 if (uv_gp_table) {
1220 hi->global_mmr_base = uv_gp_table->mmr_base;
1221 hi->global_mmr_shift = uv_gp_table->mmr_shift;
1222 hi->global_gru_base = uv_gp_table->gru_base;
1223 hi->global_gru_shift = uv_gp_table->gru_shift;
1224 hi->gpa_shift = uv_gp_table->gpa_shift;
1225 hi->gpa_mask = (1UL << hi->gpa_shift) - 1;
1226 } else {
1227 hi->global_mmr_base =
1228 uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG) &
1229 ~UV_MMR_ENABLE;
1230 hi->global_mmr_shift = _UV_GLOBAL_MMR64_PNODE_SHIFT;
1231 }
1232
1233 get_lowmem_redirect(&hi->lowmem_remap_base, &hi->lowmem_remap_top);
1234
1235 hi->apic_pnode_shift = uv_cpuid.socketid_shift;
1236
1237 /* Show system specific info: */
1238 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);
1239 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);
1240 pr_info("UV: mmr_base/shift:0x%lx/%ld\n", hi->global_mmr_base, hi->global_mmr_shift);
1241 if (hi->global_gru_base)
1242 pr_info("UV: gru_base/shift:0x%lx/%ld\n",
1243 hi->global_gru_base, hi->global_gru_shift);
1244
1245 pr_info("UV: gnode_upper:0x%lx gnode_extra:0x%x\n", hi->gnode_upper, hi->gnode_extra);
1246 }
1247
1248 static void __init decode_gam_params(unsigned long ptr)
1249 {
1250 uv_gp_table = (struct uv_gam_parameters *)ptr;
1251
1252 pr_info("UV: GAM Params...\n");
1253 pr_info("UV: mmr_base/shift:0x%llx/%d gru_base/shift:0x%llx/%d gpa_shift:%d\n",
1254 uv_gp_table->mmr_base, uv_gp_table->mmr_shift,
1255 uv_gp_table->gru_base, uv_gp_table->gru_shift,
1256 uv_gp_table->gpa_shift);
1257 }
1258
1259 static void __init decode_gam_rng_tbl(unsigned long ptr)
1260 {
1261 struct uv_gam_range_entry *gre = (struct uv_gam_range_entry *)ptr;
1262 unsigned long lgre = 0, gend = 0;
1263 int index = 0;
1264 int sock_min = INT_MAX, pnode_min = INT_MAX;
1265 int sock_max = -1, pnode_max = -1;
1266
1267 uv_gre_table = gre;
1268 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1269 unsigned long size = ((unsigned long)(gre->limit - lgre)
1270 << UV_GAM_RANGE_SHFT);
1271 int order = 0;
1272 char suffix[] = " KMGTPE";
1273 int flag = ' ';
1274
1275 while (size > 9999 && order < sizeof(suffix)) {
1276 size /= 1024;
1277 order++;
1278 }
1279
1280 /* adjust max block size to current range start */
1281 if (gre->type == 1 || gre->type == 2)
1282 if (adj_blksize(lgre))
1283 flag = '*';
1284
1285 if (!index) {
1286 pr_info("UV: GAM Range Table...\n");
1287 pr_info("UV: # %20s %14s %6s %4s %5s %3s %2s\n", "Range", "", "Size", "Type", "NASID", "SID", "PN");
1288 }
1289 pr_info("UV: %2d: 0x%014lx-0x%014lx%c %5lu%c %3d %04x %02x %02x\n",
1290 index++,
1291 (unsigned long)lgre << UV_GAM_RANGE_SHFT,
1292 (unsigned long)gre->limit << UV_GAM_RANGE_SHFT,
1293 flag, size, suffix[order],
1294 gre->type, gre->nasid, gre->sockid, gre->pnode);
1295
1296 if (gre->type == UV_GAM_RANGE_TYPE_HOLE)
1297 gend = (unsigned long)gre->limit << UV_GAM_RANGE_SHFT;
1298
1299 /* update to next range start */
1300 lgre = gre->limit;
1301 if (sock_min > gre->sockid)
1302 sock_min = gre->sockid;
1303 if (sock_max < gre->sockid)
1304 sock_max = gre->sockid;
1305 if (pnode_min > gre->pnode)
1306 pnode_min = gre->pnode;
1307 if (pnode_max < gre->pnode)
1308 pnode_max = gre->pnode;
1309 }
1310 _min_socket = sock_min;
1311 _max_socket = sock_max;
1312 _min_pnode = pnode_min;
1313 _max_pnode = pnode_max;
1314 _gr_table_len = index;
1315
1316 pr_info("UV: GRT: %d entries, sockets(min:%x,max:%x), pnodes(min:%x,max:%x), gap_end(%d)\n",
1317 index, _min_socket, _max_socket, _min_pnode, _max_pnode, fls64(gend));
1318 }
1319
1320 /* Walk through UVsystab decoding the fields */
1321 static int __init decode_uv_systab(void)
1322 {
1323 struct uv_systab *st;
1324 int i;
1325
1326 /* Get mapped UVsystab pointer */
1327 st = uv_systab;
1328
1329 /* If UVsystab is version 1, there is no extended UVsystab */
1330 if (st && st->revision == UV_SYSTAB_VERSION_1)
1331 return 0;
1332
1333 if ((!st) || (st->revision < UV_SYSTAB_VERSION_UV4_LATEST)) {
1334 int rev = st ? st->revision : 0;
1335
1336 pr_err("UV: BIOS UVsystab mismatch, (%x < %x)\n",
1337 rev, UV_SYSTAB_VERSION_UV4_LATEST);
1338 pr_err("UV: Does not support UV, switch to non-UV x86_64\n");
1339 uv_system_type = UV_NONE;
1340
1341 return -EINVAL;
1342 }
1343
1344 for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
1345 unsigned long ptr = st->entry[i].offset;
1346
1347 if (!ptr)
1348 continue;
1349
1350 /* point to payload */
1351 ptr += (unsigned long)st;
1352
1353 switch (st->entry[i].type) {
1354 case UV_SYSTAB_TYPE_GAM_PARAMS:
1355 decode_gam_params(ptr);
1356 break;
1357
1358 case UV_SYSTAB_TYPE_GAM_RNG_TBL:
1359 decode_gam_rng_tbl(ptr);
1360 break;
1361
1362 case UV_SYSTAB_TYPE_ARCH_TYPE:
1363 /* already processed in early startup */
1364 break;
1365
1366 default:
1367 pr_err("UV:%s:Unrecognized UV_SYSTAB_TYPE:%d, skipped\n",
1368 __func__, st->entry[i].type);
1369 break;
1370 }
1371 }
1372 return 0;
1373 }
1374
1375 /*
1376 * Given a bitmask 'bits' representing presnt blades, numbered
1377 * starting at 'base', masking off unused high bits of blade number
1378 * with 'mask', update the minimum and maximum blade numbers that we
1379 * have found. (Masking with 'mask' necessary because of BIOS
1380 * treatment of system partitioning when creating this table we are
1381 * interpreting.)
1382 */
1383 static inline void blade_update_min_max(unsigned long bits, int base, int mask, int *min, int *max)
1384 {
1385 int first, last;
1386
1387 if (!bits)
1388 return;
1389 first = (base + __ffs(bits)) & mask;
1390 last = (base + __fls(bits)) & mask;
1391
1392 if (*min > first)
1393 *min = first;
1394 if (*max < last)
1395 *max = last;
1396 }
1397
1398 /* Set up physical blade translations from UVH_NODE_PRESENT_TABLE */
1399 static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
1400 {
1401 unsigned long np;
1402 int i, uv_pb = 0;
1403 int sock_min = INT_MAX, sock_max = -1, s_mask;
1404
1405 s_mask = (1 << uv_cpuid.n_skt) - 1;
1406
1407 if (UVH_NODE_PRESENT_TABLE) {
1408 pr_info("UV: NODE_PRESENT_DEPTH = %d\n",
1409 UVH_NODE_PRESENT_TABLE_DEPTH);
1410 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
1411 np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
1412 pr_info("UV: NODE_PRESENT(%d) = 0x%016lx\n", i, np);
1413 blade_update_min_max(np, i * 64, s_mask, &sock_min, &sock_max);
1414 }
1415 }
1416 if (UVH_NODE_PRESENT_0) {
1417 np = uv_read_local_mmr(UVH_NODE_PRESENT_0);
1418 pr_info("UV: NODE_PRESENT_0 = 0x%016lx\n", np);
1419 blade_update_min_max(np, 0, s_mask, &sock_min, &sock_max);
1420 }
1421 if (UVH_NODE_PRESENT_1) {
1422 np = uv_read_local_mmr(UVH_NODE_PRESENT_1);
1423 pr_info("UV: NODE_PRESENT_1 = 0x%016lx\n", np);
1424 blade_update_min_max(np, 64, s_mask, &sock_min, &sock_max);
1425 }
1426
1427 /* Only update if we actually found some bits indicating blades present */
1428 if (sock_max >= sock_min) {
1429 _min_socket = sock_min;
1430 _max_socket = sock_max;
1431 uv_pb = sock_max - sock_min + 1;
1432 }
1433 if (uv_possible_blades != uv_pb)
1434 uv_possible_blades = uv_pb;
1435
1436 pr_info("UV: number nodes/possible blades %d (%d - %d)\n",
1437 uv_pb, sock_min, sock_max);
1438 }
1439
1440 static int __init alloc_conv_table(int num_elem, unsigned short **table)
1441 {
1442 int i;
1443 size_t bytes;
1444
1445 bytes = num_elem * sizeof(*table[0]);
1446 *table = kmalloc(bytes, GFP_KERNEL);
1447 if (WARN_ON_ONCE(!*table))
1448 return -ENOMEM;
1449 for (i = 0; i < num_elem; i++)
1450 ((unsigned short *)*table)[i] = SOCK_EMPTY;
1451 return 0;
1452 }
1453
1454 /* Remove conversion table if it's 1:1 */
1455 #define FREE_1_TO_1_TABLE(tbl, min, max, max2) free_1_to_1_table(&tbl, #tbl, min, max, max2)
1456
1457 static void __init free_1_to_1_table(unsigned short **tp, char *tname, int min, int max, int max2)
1458 {
1459 int i;
1460 unsigned short *table = *tp;
1461
1462 if (table == NULL)
1463 return;
1464 if (max != max2)
1465 return;
1466 for (i = 0; i < max; i++) {
1467 if (i != table[i])
1468 return;
1469 }
1470 kfree(table);
1471 *tp = NULL;
1472 pr_info("UV: %s is 1:1, conversion table removed\n", tname);
1473 }
1474
1475 /*
1476 * Build Socket Tables
1477 * If the number of nodes is >1 per socket, socket to node table will
1478 * contain lowest node number on that socket.
1479 */
1480 static void __init build_socket_tables(void)
1481 {
1482 struct uv_gam_range_entry *gre = uv_gre_table;
1483 int nums, numn, nump;
1484 int i, lnid, apicid;
1485 int minsock = _min_socket;
1486 int maxsock = _max_socket;
1487 int minpnode = _min_pnode;
1488 int maxpnode = _max_pnode;
1489
1490 if (!gre) {
1491 if (is_uv2_hub() || is_uv3_hub()) {
1492 pr_info("UV: No UVsystab socket table, ignoring\n");
1493 return;
1494 }
1495 pr_err("UV: Error: UVsystab address translations not available!\n");
1496 WARN_ON_ONCE(!gre);
1497 return;
1498 }
1499
1500 numn = num_possible_nodes();
1501 nump = maxpnode - minpnode + 1;
1502 nums = maxsock - minsock + 1;
1503
1504 /* Allocate and clear tables */
1505 if ((alloc_conv_table(nump, &_pnode_to_socket) < 0)
1506 || (alloc_conv_table(nums, &_socket_to_pnode) < 0)
1507 || (alloc_conv_table(numn, &_node_to_socket) < 0)
1508 || (alloc_conv_table(nums, &_socket_to_node) < 0)) {
1509 kfree(_pnode_to_socket);
1510 kfree(_socket_to_pnode);
1511 kfree(_node_to_socket);
1512 return;
1513 }
1514
1515 /* Fill in pnode/node/addr conversion list values: */
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 if (_socket_to_pnode[i] == SOCK_EMPTY)
1521 _socket_to_pnode[i] = gre->pnode;
1522
1523 i = gre->pnode - minpnode;
1524 if (_pnode_to_socket[i] == SOCK_EMPTY)
1525 _pnode_to_socket[i] = gre->sockid;
1526
1527 pr_info("UV: sid:%02x type:%d nasid:%04x pn:%02x pn2s:%2x\n",
1528 gre->sockid, gre->type, gre->nasid,
1529 _socket_to_pnode[gre->sockid - minsock],
1530 _pnode_to_socket[gre->pnode - minpnode]);
1531 }
1532
1533 /* Set socket -> node values: */
1534 lnid = NUMA_NO_NODE;
1535 for (apicid = 0; apicid < ARRAY_SIZE(__apicid_to_node); apicid++) {
1536 int nid = __apicid_to_node[apicid];
1537 int sockid;
1538
1539 if ((nid == NUMA_NO_NODE) || (lnid == nid))
1540 continue;
1541 lnid = nid;
1542
1543 sockid = apicid >> uv_cpuid.socketid_shift;
1544
1545 if (_socket_to_node[sockid - minsock] == SOCK_EMPTY)
1546 _socket_to_node[sockid - minsock] = nid;
1547
1548 if (_node_to_socket[nid] == SOCK_EMPTY)
1549 _node_to_socket[nid] = sockid;
1550
1551 pr_info("UV: sid:%02x: apicid:%04x socket:%02d node:%03x s2n:%03x\n",
1552 sockid,
1553 apicid,
1554 _node_to_socket[nid],
1555 nid,
1556 _socket_to_node[sockid - minsock]);
1557 }
1558
1559 /*
1560 * If e.g. socket id == pnode for all pnodes,
1561 * system runs faster by removing corresponding conversion table.
1562 */
1563 FREE_1_TO_1_TABLE(_socket_to_node, _min_socket, nums, numn);
1564 FREE_1_TO_1_TABLE(_node_to_socket, _min_socket, nums, numn);
1565 FREE_1_TO_1_TABLE(_socket_to_pnode, _min_pnode, nums, nump);
1566 FREE_1_TO_1_TABLE(_pnode_to_socket, _min_pnode, nums, nump);
1567 }
1568
1569 /* Check which reboot to use */
1570 static void check_efi_reboot(void)
1571 {
1572 /* If EFI reboot not available, use ACPI reboot */
1573 if (!efi_enabled(EFI_BOOT))
1574 reboot_type = BOOT_ACPI;
1575 }
1576
1577 /*
1578 * User proc fs file handling now deprecated.
1579 * Recommend using /sys/firmware/sgi_uv/... instead.
1580 */
1581 static int __maybe_unused proc_hubbed_show(struct seq_file *file, void *data)
1582 {
1583 pr_notice_once("%s: using deprecated /proc/sgi_uv/hubbed, use /sys/firmware/sgi_uv/hub_type\n",
1584 current->comm);
1585 seq_printf(file, "0x%x\n", uv_hubbed_system);
1586 return 0;
1587 }
1588
1589 static int __maybe_unused proc_hubless_show(struct seq_file *file, void *data)
1590 {
1591 pr_notice_once("%s: using deprecated /proc/sgi_uv/hubless, use /sys/firmware/sgi_uv/hubless\n",
1592 current->comm);
1593 seq_printf(file, "0x%x\n", uv_hubless_system);
1594 return 0;
1595 }
1596
1597 static int __maybe_unused proc_archtype_show(struct seq_file *file, void *data)
1598 {
1599 pr_notice_once("%s: using deprecated /proc/sgi_uv/archtype, use /sys/firmware/sgi_uv/archtype\n",
1600 current->comm);
1601 seq_printf(file, "%s/%s\n", uv_archtype, oem_table_id);
1602 return 0;
1603 }
1604
1605 static __init void uv_setup_proc_files(int hubless)
1606 {
1607 struct proc_dir_entry *pde;
1608
1609 pde = proc_mkdir(UV_PROC_NODE, NULL);
1610 proc_create_single("archtype", 0, pde, proc_archtype_show);
1611 if (hubless)
1612 proc_create_single("hubless", 0, pde, proc_hubless_show);
1613 else
1614 proc_create_single("hubbed", 0, pde, proc_hubbed_show);
1615 }
1616
1617 /* Initialize UV hubless systems */
1618 static __init int uv_system_init_hubless(void)
1619 {
1620 int rc;
1621
1622 /* Setup PCH NMI handler */
1623 uv_nmi_setup_hubless();
1624
1625 /* Init kernel/BIOS interface */
1626 rc = uv_bios_init();
1627 if (rc < 0)
1628 return rc;
1629
1630 /* Process UVsystab */
1631 rc = decode_uv_systab();
1632 if (rc < 0)
1633 return rc;
1634
1635 /* Set section block size for current node memory */
1636 set_block_size();
1637
1638 /* Create user access node */
1639 if (rc >= 0)
1640 uv_setup_proc_files(1);
1641
1642 check_efi_reboot();
1643
1644 return rc;
1645 }
1646
1647 static void __init uv_system_init_hub(void)
1648 {
1649 struct uv_hub_info_s hub_info = {0};
1650 int bytes, cpu, nodeid, bid;
1651 unsigned short min_pnode = USHRT_MAX, max_pnode = 0;
1652 char *hub = is_uv5_hub() ? "UV500" :
1653 is_uv4_hub() ? "UV400" :
1654 is_uv3_hub() ? "UV300" :
1655 is_uv2_hub() ? "UV2000/3000" : NULL;
1656 struct uv_hub_info_s **uv_hub_info_list_blade;
1657
1658 if (!hub) {
1659 pr_err("UV: Unknown/unsupported UV hub\n");
1660 return;
1661 }
1662 pr_info("UV: Found %s hub\n", hub);
1663
1664 map_low_mmrs();
1665
1666 /* Get uv_systab for decoding, setup UV BIOS calls */
1667 uv_bios_init();
1668
1669 /* If there's an UVsystab problem then abort UV init: */
1670 if (decode_uv_systab() < 0) {
1671 pr_err("UV: Mangled UVsystab format\n");
1672 return;
1673 }
1674
1675 build_socket_tables();
1676 build_uv_gr_table();
1677 set_block_size();
1678 uv_init_hub_info(&hub_info);
1679 /* If UV2 or UV3 may need to get # blades from HW */
1680 if (is_uv(UV2|UV3) && !uv_gre_table)
1681 boot_init_possible_blades(&hub_info);
1682 else
1683 /* min/max sockets set in decode_gam_rng_tbl */
1684 uv_possible_blades = (_max_socket - _min_socket) + 1;
1685
1686 /* uv_num_possible_blades() is really the hub count: */
1687 pr_info("UV: Found %d hubs, %d nodes, %d CPUs\n", uv_num_possible_blades(), num_possible_nodes(), num_possible_cpus());
1688
1689 uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id, &sn_region_size, &system_serial_number);
1690 hub_info.coherency_domain_number = sn_coherency_id;
1691 uv_rtc_init();
1692
1693 /*
1694 * __uv_hub_info_list[] is indexed by node, but there is only
1695 * one hub_info structure per blade. First, allocate one
1696 * structure per blade. Further down we create a per-node
1697 * table (__uv_hub_info_list[]) pointing to hub_info
1698 * structures for the correct blade.
1699 */
1700
1701 bytes = sizeof(void *) * uv_num_possible_blades();
1702 uv_hub_info_list_blade = kzalloc(bytes, GFP_KERNEL);
1703 if (WARN_ON_ONCE(!uv_hub_info_list_blade))
1704 return;
1705
1706 bytes = sizeof(struct uv_hub_info_s);
1707 for_each_possible_blade(bid) {
1708 struct uv_hub_info_s *new_hub;
1709
1710 /* Allocate & fill new per hub info list */
1711 new_hub = (bid == 0) ? &uv_hub_info_node0
1712 : kzalloc_node(bytes, GFP_KERNEL, uv_blade_to_node(bid));
1713 if (WARN_ON_ONCE(!new_hub)) {
1714 /* do not kfree() bid 0, which is statically allocated */
1715 while (--bid > 0)
1716 kfree(uv_hub_info_list_blade[bid]);
1717 kfree(uv_hub_info_list_blade);
1718 return;
1719 }
1720
1721 uv_hub_info_list_blade[bid] = new_hub;
1722 *new_hub = hub_info;
1723
1724 /* Use information from GAM table if available: */
1725 if (uv_gre_table)
1726 new_hub->pnode = uv_blade_to_pnode(bid);
1727 else /* Or fill in during CPU loop: */
1728 new_hub->pnode = 0xffff;
1729
1730 new_hub->numa_blade_id = bid;
1731 new_hub->memory_nid = NUMA_NO_NODE;
1732 new_hub->nr_possible_cpus = 0;
1733 new_hub->nr_online_cpus = 0;
1734 }
1735
1736 /*
1737 * Now populate __uv_hub_info_list[] for each node with the
1738 * pointer to the struct for the blade it resides on.
1739 */
1740
1741 bytes = sizeof(void *) * num_possible_nodes();
1742 __uv_hub_info_list = kzalloc(bytes, GFP_KERNEL);
1743 if (WARN_ON_ONCE(!__uv_hub_info_list)) {
1744 for_each_possible_blade(bid)
1745 /* bid 0 is statically allocated */
1746 if (bid != 0)
1747 kfree(uv_hub_info_list_blade[bid]);
1748 kfree(uv_hub_info_list_blade);
1749 return;
1750 }
1751
1752 for_each_node(nodeid)
1753 __uv_hub_info_list[nodeid] = uv_hub_info_list_blade[uv_node_to_blade_id(nodeid)];
1754
1755 /* Initialize per CPU info: */
1756 for_each_possible_cpu(cpu) {
1757 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
1758 unsigned short bid;
1759 unsigned short pnode;
1760
1761 pnode = uv_apicid_to_pnode(apicid);
1762 bid = uv_pnode_to_socket(pnode) - _min_socket;
1763
1764 uv_cpu_info_per(cpu)->p_uv_hub_info = uv_hub_info_list_blade[bid];
1765 uv_cpu_info_per(cpu)->blade_cpu_id = uv_cpu_hub_info(cpu)->nr_possible_cpus++;
1766 if (uv_cpu_hub_info(cpu)->memory_nid == NUMA_NO_NODE)
1767 uv_cpu_hub_info(cpu)->memory_nid = cpu_to_node(cpu);
1768
1769 if (uv_cpu_hub_info(cpu)->pnode == 0xffff)
1770 uv_cpu_hub_info(cpu)->pnode = pnode;
1771 }
1772
1773 for_each_possible_blade(bid) {
1774 unsigned short pnode = uv_hub_info_list_blade[bid]->pnode;
1775
1776 if (pnode == 0xffff)
1777 continue;
1778
1779 min_pnode = min(pnode, min_pnode);
1780 max_pnode = max(pnode, max_pnode);
1781 pr_info("UV: HUB:%2d pn:%02x nrcpus:%d\n",
1782 bid,
1783 uv_hub_info_list_blade[bid]->pnode,
1784 uv_hub_info_list_blade[bid]->nr_possible_cpus);
1785 }
1786
1787 pr_info("UV: min_pnode:%02x max_pnode:%02x\n", min_pnode, max_pnode);
1788 map_gru_high(max_pnode);
1789 map_mmr_high(max_pnode);
1790 map_mmioh_high(min_pnode, max_pnode);
1791
1792 kfree(uv_hub_info_list_blade);
1793 uv_hub_info_list_blade = NULL;
1794
1795 uv_nmi_setup();
1796 uv_cpu_init();
1797 uv_setup_proc_files(0);
1798
1799 /* Register Legacy VGA I/O redirection handler: */
1800 pci_register_set_vga_state(uv_set_vga_state);
1801
1802 check_efi_reboot();
1803 }
1804
1805 /*
1806 * There is a different code path needed to initialize a UV system that does
1807 * not have a "UV HUB" (referred to as "hubless").
1808 */
1809 void __init uv_system_init(void)
1810 {
1811 if (likely(!is_uv_system() && !is_uv_hubless(1)))
1812 return;
1813
1814 if (is_uv_system())
1815 uv_system_init_hub();
1816 else
1817 uv_system_init_hubless();
1818 }
1819
1820 apic_driver(apic_x2apic_uv_x);
Kernel DRM miscellaneous fixes and cross-tree changes