aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/kernel/cpu/perf_event_p4.c
blob: febb12cea795268f224a9d39937e3f27bb86bf67 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
/*
 * Netburst Perfomance Events (P4, old Xeon)
 *
 *  Copyright (C) 2010 Parallels, Inc., Cyrill Gorcunov <gorcunov@openvz.org>
 *  Copyright (C) 2010 Intel Corporation, Lin Ming <ming.m.lin@intel.com>
 *
 *  For licencing details see kernel-base/COPYING
 */

#ifdef CONFIG_CPU_SUP_INTEL

#include <asm/perf_event_p4.h>

#define P4_CNTR_LIMIT 3
/*
 * array indices: 0,1 - HT threads, used with HT enabled cpu
 */
struct p4_event_bind {
	unsigned int opcode;			/* Event code and ESCR selector */
	unsigned int escr_msr[2];		/* ESCR MSR for this event */
	char cntr[2][P4_CNTR_LIMIT];		/* counter index (offset), -1 on abscence */
};

struct p4_pebs_bind {
	unsigned int metric_pebs;
	unsigned int metric_vert;
};

/* it sets P4_PEBS_ENABLE_UOP_TAG as well */
#define P4_GEN_PEBS_BIND(name, pebs, vert)			\
	[P4_PEBS_METRIC__##name] = {				\
		.metric_pebs = pebs | P4_PEBS_ENABLE_UOP_TAG,	\
		.metric_vert = vert,				\
	}

/*
 * note we have P4_PEBS_ENABLE_UOP_TAG always set here
 *
 * it's needed for mapping P4_PEBS_CONFIG_METRIC_MASK bits of
 * event configuration to find out which values are to be
 * written into MSR_IA32_PEBS_ENABLE and MSR_P4_PEBS_MATRIX_VERT
 * resgisters
 */
static struct p4_pebs_bind p4_pebs_bind_map[] = {
	P4_GEN_PEBS_BIND(1stl_cache_load_miss_retired,	0x0000001, 0x0000001),
	P4_GEN_PEBS_BIND(2ndl_cache_load_miss_retired,	0x0000002, 0x0000001),
	P4_GEN_PEBS_BIND(dtlb_load_miss_retired,	0x0000004, 0x0000001),
	P4_GEN_PEBS_BIND(dtlb_store_miss_retired,	0x0000004, 0x0000002),
	P4_GEN_PEBS_BIND(dtlb_all_miss_retired,		0x0000004, 0x0000003),
	P4_GEN_PEBS_BIND(tagged_mispred_branch,		0x0018000, 0x0000010),
	P4_GEN_PEBS_BIND(mob_load_replay_retired,	0x0000200, 0x0000001),
	P4_GEN_PEBS_BIND(split_load_retired,		0x0000400, 0x0000001),
	P4_GEN_PEBS_BIND(split_store_retired,		0x0000400, 0x0000002),
};

/*
 * Note that we don't use CCCR1 here, there is an
 * exception for P4_BSQ_ALLOCATION but we just have
 * no workaround
 *
 * consider this binding as resources which particular
 * event may borrow, it doesn't contain EventMask,
 * Tags and friends -- they are left to a caller
 */
static struct p4_event_bind p4_event_bind_map[] = {
	[P4_EVENT_TC_DELIVER_MODE] = {
		.opcode		= P4_OPCODE(P4_EVENT_TC_DELIVER_MODE),
		.escr_msr	= { MSR_P4_TC_ESCR0, MSR_P4_TC_ESCR1 },
		.cntr		= { {4, 5, -1}, {6, 7, -1} },
	},
	[P4_EVENT_BPU_FETCH_REQUEST] = {
		.opcode		= P4_OPCODE(P4_EVENT_BPU_FETCH_REQUEST),
		.escr_msr	= { MSR_P4_BPU_ESCR0, MSR_P4_BPU_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_ITLB_REFERENCE] = {
		.opcode		= P4_OPCODE(P4_EVENT_ITLB_REFERENCE),
		.escr_msr	= { MSR_P4_ITLB_ESCR0, MSR_P4_ITLB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_MEMORY_CANCEL] = {
		.opcode		= P4_OPCODE(P4_EVENT_MEMORY_CANCEL),
		.escr_msr	= { MSR_P4_DAC_ESCR0, MSR_P4_DAC_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_MEMORY_COMPLETE] = {
		.opcode		= P4_OPCODE(P4_EVENT_MEMORY_COMPLETE),
		.escr_msr	= { MSR_P4_SAAT_ESCR0 , MSR_P4_SAAT_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_LOAD_PORT_REPLAY] = {
		.opcode		= P4_OPCODE(P4_EVENT_LOAD_PORT_REPLAY),
		.escr_msr	= { MSR_P4_SAAT_ESCR0, MSR_P4_SAAT_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_STORE_PORT_REPLAY] = {
		.opcode		= P4_OPCODE(P4_EVENT_STORE_PORT_REPLAY),
		.escr_msr	= { MSR_P4_SAAT_ESCR0 ,  MSR_P4_SAAT_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_MOB_LOAD_REPLAY] = {
		.opcode		= P4_OPCODE(P4_EVENT_MOB_LOAD_REPLAY),
		.escr_msr	= { MSR_P4_MOB_ESCR0, MSR_P4_MOB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_PAGE_WALK_TYPE] = {
		.opcode		= P4_OPCODE(P4_EVENT_PAGE_WALK_TYPE),
		.escr_msr	= { MSR_P4_PMH_ESCR0, MSR_P4_PMH_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_BSQ_CACHE_REFERENCE] = {
		.opcode		= P4_OPCODE(P4_EVENT_BSQ_CACHE_REFERENCE),
		.escr_msr	= { MSR_P4_BSU_ESCR0, MSR_P4_BSU_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_IOQ_ALLOCATION] = {
		.opcode		= P4_OPCODE(P4_EVENT_IOQ_ALLOCATION),
		.escr_msr	= { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_IOQ_ACTIVE_ENTRIES] = {	/* shared ESCR */
		.opcode		= P4_OPCODE(P4_EVENT_IOQ_ACTIVE_ENTRIES),
		.escr_msr	= { MSR_P4_FSB_ESCR1,  MSR_P4_FSB_ESCR1 },
		.cntr		= { {2, -1, -1}, {3, -1, -1} },
	},
	[P4_EVENT_FSB_DATA_ACTIVITY] = {
		.opcode		= P4_OPCODE(P4_EVENT_FSB_DATA_ACTIVITY),
		.escr_msr	= { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_BSQ_ALLOCATION] = {		/* shared ESCR, broken CCCR1 */
		.opcode		= P4_OPCODE(P4_EVENT_BSQ_ALLOCATION),
		.escr_msr	= { MSR_P4_BSU_ESCR0, MSR_P4_BSU_ESCR0 },
		.cntr		= { {0, -1, -1}, {1, -1, -1} },
	},
	[P4_EVENT_BSQ_ACTIVE_ENTRIES] = {	/* shared ESCR */
		.opcode		= P4_OPCODE(P4_EVENT_BSQ_ACTIVE_ENTRIES),
		.escr_msr	= { MSR_P4_BSU_ESCR1 , MSR_P4_BSU_ESCR1 },
		.cntr		= { {2, -1, -1}, {3, -1, -1} },
	},
	[P4_EVENT_SSE_INPUT_ASSIST] = {
		.opcode		= P4_OPCODE(P4_EVENT_SSE_INPUT_ASSIST),
		.escr_msr	= { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_PACKED_SP_UOP] = {
		.opcode		= P4_OPCODE(P4_EVENT_PACKED_SP_UOP),
		.escr_msr	= { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_PACKED_DP_UOP] = {
		.opcode		= P4_OPCODE(P4_EVENT_PACKED_DP_UOP),
		.escr_msr	= { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_SCALAR_SP_UOP] = {
		.opcode		= P4_OPCODE(P4_EVENT_SCALAR_SP_UOP),
		.escr_msr	= { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_SCALAR_DP_UOP] = {
		.opcode		= P4_OPCODE(P4_EVENT_SCALAR_DP_UOP),
		.escr_msr	= { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_64BIT_MMX_UOP] = {
		.opcode		= P4_OPCODE(P4_EVENT_64BIT_MMX_UOP),
		.escr_msr	= { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_128BIT_MMX_UOP] = {
		.opcode		= P4_OPCODE(P4_EVENT_128BIT_MMX_UOP),
		.escr_msr	= { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_X87_FP_UOP] = {
		.opcode		= P4_OPCODE(P4_EVENT_X87_FP_UOP),
		.escr_msr	= { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_TC_MISC] = {
		.opcode		= P4_OPCODE(P4_EVENT_TC_MISC),
		.escr_msr	= { MSR_P4_TC_ESCR0, MSR_P4_TC_ESCR1 },
		.cntr		= { {4, 5, -1}, {6, 7, -1} },
	},
	[P4_EVENT_GLOBAL_POWER_EVENTS] = {
		.opcode		= P4_OPCODE(P4_EVENT_GLOBAL_POWER_EVENTS),
		.escr_msr	= { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_TC_MS_XFER] = {
		.opcode		= P4_OPCODE(P4_EVENT_TC_MS_XFER),
		.escr_msr	= { MSR_P4_MS_ESCR0, MSR_P4_MS_ESCR1 },
		.cntr		= { {4, 5, -1}, {6, 7, -1} },
	},
	[P4_EVENT_UOP_QUEUE_WRITES] = {
		.opcode		= P4_OPCODE(P4_EVENT_UOP_QUEUE_WRITES),
		.escr_msr	= { MSR_P4_MS_ESCR0, MSR_P4_MS_ESCR1 },
		.cntr		= { {4, 5, -1}, {6, 7, -1} },
	},
	[P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE] = {
		.opcode		= P4_OPCODE(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE),
		.escr_msr	= { MSR_P4_TBPU_ESCR0 , MSR_P4_TBPU_ESCR0 },
		.cntr		= { {4, 5, -1}, {6, 7, -1} },
	},
	[P4_EVENT_RETIRED_BRANCH_TYPE] = {
		.opcode		= P4_OPCODE(P4_EVENT_RETIRED_BRANCH_TYPE),
		.escr_msr	= { MSR_P4_TBPU_ESCR0 , MSR_P4_TBPU_ESCR1 },
		.cntr		= { {4, 5, -1}, {6, 7, -1} },
	},
	[P4_EVENT_RESOURCE_STALL] = {
		.opcode		= P4_OPCODE(P4_EVENT_RESOURCE_STALL),
		.escr_msr	= { MSR_P4_ALF_ESCR0, MSR_P4_ALF_ESCR1 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_WC_BUFFER] = {
		.opcode		= P4_OPCODE(P4_EVENT_WC_BUFFER),
		.escr_msr	= { MSR_P4_DAC_ESCR0, MSR_P4_DAC_ESCR1 },
		.cntr		= { {8, 9, -1}, {10, 11, -1} },
	},
	[P4_EVENT_B2B_CYCLES] = {
		.opcode		= P4_OPCODE(P4_EVENT_B2B_CYCLES),
		.escr_msr	= { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_BNR] = {
		.opcode		= P4_OPCODE(P4_EVENT_BNR),
		.escr_msr	= { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_SNOOP] = {
		.opcode		= P4_OPCODE(P4_EVENT_SNOOP),
		.escr_msr	= { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_RESPONSE] = {
		.opcode		= P4_OPCODE(P4_EVENT_RESPONSE),
		.escr_msr	= { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
		.cntr		= { {0, -1, -1}, {2, -1, -1} },
	},
	[P4_EVENT_FRONT_END_EVENT] = {
		.opcode		= P4_OPCODE(P4_EVENT_FRONT_END_EVENT),
		.escr_msr	= { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_EXECUTION_EVENT] = {
		.opcode		= P4_OPCODE(P4_EVENT_EXECUTION_EVENT),
		.escr_msr	= { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_REPLAY_EVENT] = {
		.opcode		= P4_OPCODE(P4_EVENT_REPLAY_EVENT),
		.escr_msr	= { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_INSTR_RETIRED] = {
		.opcode		= P4_OPCODE(P4_EVENT_INSTR_RETIRED),
		.escr_msr	= { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_UOPS_RETIRED] = {
		.opcode		= P4_OPCODE(P4_EVENT_UOPS_RETIRED),
		.escr_msr	= { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_UOP_TYPE] = {
		.opcode		= P4_OPCODE(P4_EVENT_UOP_TYPE),
		.escr_msr	= { MSR_P4_RAT_ESCR0, MSR_P4_RAT_ESCR1 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_BRANCH_RETIRED] = {
		.opcode		= P4_OPCODE(P4_EVENT_BRANCH_RETIRED),
		.escr_msr	= { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_MISPRED_BRANCH_RETIRED] = {
		.opcode		= P4_OPCODE(P4_EVENT_MISPRED_BRANCH_RETIRED),
		.escr_msr	= { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_X87_ASSIST] = {
		.opcode		= P4_OPCODE(P4_EVENT_X87_ASSIST),
		.escr_msr	= { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_MACHINE_CLEAR] = {
		.opcode		= P4_OPCODE(P4_EVENT_MACHINE_CLEAR),
		.escr_msr	= { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
	[P4_EVENT_INSTR_COMPLETED] = {
		.opcode		= P4_OPCODE(P4_EVENT_INSTR_COMPLETED),
		.escr_msr	= { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
		.cntr		= { {12, 13, 16}, {14, 15, 17} },
	},
};

#define P4_GEN_CACHE_EVENT(event, bit, metric)				  \
	p4_config_pack_escr(P4_ESCR_EVENT(event)			| \
			    P4_ESCR_EMASK_BIT(event, bit))		| \
	p4_config_pack_cccr(metric					| \
			    P4_CCCR_ESEL(P4_OPCODE_ESEL(P4_OPCODE(event))))

static __initconst const u64 p4_hw_cache_event_ids
				[PERF_COUNT_HW_CACHE_MAX]
				[PERF_COUNT_HW_CACHE_OP_MAX]
				[PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
 [ C(L1D ) ] = {
	[ C(OP_READ) ] = {
		[ C(RESULT_ACCESS) ] = 0x0,
		[ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
						P4_PEBS_METRIC__1stl_cache_load_miss_retired),
	},
 },
 [ C(LL  ) ] = {
	[ C(OP_READ) ] = {
		[ C(RESULT_ACCESS) ] = 0x0,
		[ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
						P4_PEBS_METRIC__2ndl_cache_load_miss_retired),
	},
},
 [ C(DTLB) ] = {
	[ C(OP_READ) ] = {
		[ C(RESULT_ACCESS) ] = 0x0,
		[ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
						P4_PEBS_METRIC__dtlb_load_miss_retired),
	},
	[ C(OP_WRITE) ] = {
		[ C(RESULT_ACCESS) ] = 0x0,
		[ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
						P4_PEBS_METRIC__dtlb_store_miss_retired),
	},
 },
 [ C(ITLB) ] = {
	[ C(OP_READ) ] = {
		[ C(RESULT_ACCESS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_ITLB_REFERENCE, HIT,
						P4_PEBS_METRIC__none),
		[ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_ITLB_REFERENCE, MISS,
						P4_PEBS_METRIC__none),
	},
	[ C(OP_WRITE) ] = {
		[ C(RESULT_ACCESS) ] = -1,
		[ C(RESULT_MISS)   ] = -1,
	},
	[ C(OP_PREFETCH) ] = {
		[ C(RESULT_ACCESS) ] = -1,
		[ C(RESULT_MISS)   ] = -1,
	},
 },
};

static u64 p4_general_events[PERF_COUNT_HW_MAX] = {
  /* non-halted CPU clocks */
  [PERF_COUNT_HW_CPU_CYCLES] =
	p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_GLOBAL_POWER_EVENTS)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_GLOBAL_POWER_EVENTS, RUNNING)),

  /*
   * retired instructions
   * in a sake of simplicity we don't use the FSB tagging
   */
  [PERF_COUNT_HW_INSTRUCTIONS] =
	p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_INSTR_RETIRED)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, NBOGUSNTAG)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, BOGUSNTAG)),

  /* cache hits */
  [PERF_COUNT_HW_CACHE_REFERENCES] =
	p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_BSQ_CACHE_REFERENCE)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITS)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITE)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITM)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITS)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITE)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITM)),

  /* cache misses */
  [PERF_COUNT_HW_CACHE_MISSES] =
	p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_BSQ_CACHE_REFERENCE)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_MISS)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_MISS)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, WR_2ndL_MISS)),

  /* branch instructions retired */
  [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] =
	p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_RETIRED_BRANCH_TYPE)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, CONDITIONAL)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, CALL)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, RETURN)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, INDIRECT)),

  /* mispredicted branches retired */
  [PERF_COUNT_HW_BRANCH_MISSES]	=
	p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_MISPRED_BRANCH_RETIRED)	|
		P4_ESCR_EMASK_BIT(P4_EVENT_MISPRED_BRANCH_RETIRED, NBOGUS)),

  /* bus ready clocks (cpu is driving #DRDY_DRV\#DRDY_OWN):  */
  [PERF_COUNT_HW_BUS_CYCLES] =
	p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_FSB_DATA_ACTIVITY)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_DRV)		|
		P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_OWN))	|
	p4_config_pack_cccr(P4_CCCR_EDGE | P4_CCCR_COMPARE),
};

static struct p4_event_bind *p4_config_get_bind(u64 config)
{
	unsigned int evnt = p4_config_unpack_event(config);
	struct p4_event_bind *bind = NULL;

	if (evnt < ARRAY_SIZE(p4_event_bind_map))
		bind = &p4_event_bind_map[evnt];

	return bind;
}

static u64 p4_pmu_event_map(int hw_event)
{
	struct p4_event_bind *bind;
	unsigned int esel;
	u64 config;

	config = p4_general_events[hw_event];
	bind = p4_config_get_bind(config);
	esel = P4_OPCODE_ESEL(bind->opcode);
	config |= p4_config_pack_cccr(P4_CCCR_ESEL(esel));

	return config;
}

static int p4_validate_raw_event(struct perf_event *event)
{
	unsigned int v;

	/* user data may have out-of-bound event index */
	v = p4_config_unpack_event(event->attr.config);
	if (v >= ARRAY_SIZE(p4_event_bind_map)) {
		pr_warning("P4 PMU: Unknown event code: %d\n", v);
		return -EINVAL;
	}

	/*
	 * it may have some screwed PEBS bits
	 */
	if (p4_config_pebs_has(event->attr.config, P4_PEBS_CONFIG_ENABLE)) {
		pr_warning("P4 PMU: PEBS are not supported yet\n");
		return -EINVAL;
	}
	v = p4_config_unpack_metric(event->attr.config);
	if (v >= ARRAY_SIZE(p4_pebs_bind_map)) {
		pr_warning("P4 PMU: Unknown metric code: %d\n", v);
		return -EINVAL;
	}

	return 0;
}

static int p4_hw_config(struct perf_event *event)
{
	int cpu = get_cpu();
	int rc = 0;
	u32 escr, cccr;

	/*
	 * the reason we use cpu that early is that: if we get scheduled
	 * first time on the same cpu -- we will not need swap thread
	 * specific flags in config (and will save some cpu cycles)
	 */

	cccr = p4_default_cccr_conf(cpu);
	escr = p4_default_escr_conf(cpu, event->attr.exclude_kernel,
					 event->attr.exclude_user);
	event->hw.config = p4_config_pack_escr(escr) |
			   p4_config_pack_cccr(cccr);

	if (p4_ht_active() && p4_ht_thread(cpu))
		event->hw.config = p4_set_ht_bit(event->hw.config);

	if (event->attr.type == PERF_TYPE_RAW) {

		rc = p4_validate_raw_event(event);
		if (rc)
			goto out;

		/*
		 * We don't control raw events so it's up to the caller
		 * to pass sane values (and we don't count the thread number
		 * on HT machine but allow HT-compatible specifics to be
		 * passed on)
		 *
		 * Note that for RAW events we allow user to use P4_CCCR_RESERVED
		 * bits since we keep additional info here (for cache events and etc)
		 *
		 * XXX: HT wide things should check perf_paranoid_cpu() &&
		 *      CAP_SYS_ADMIN
		 */
		event->hw.config |= event->attr.config &
			(p4_config_pack_escr(P4_ESCR_MASK_HT) |
			 p4_config_pack_cccr(P4_CCCR_MASK_HT | P4_CCCR_RESERVED));
	}

	rc = x86_setup_perfctr(event);
out:
	put_cpu();
	return rc;
}

static inline int p4_pmu_clear_cccr_ovf(struct hw_perf_event *hwc)
{
	int overflow = 0;
	u32 low, high;

	rdmsr(hwc->config_base + hwc->idx, low, high);

	/* we need to check high bit for unflagged overflows */
	if ((low & P4_CCCR_OVF) || !(high & (1 << 31))) {
		overflow = 1;
		(void)checking_wrmsrl(hwc->config_base + hwc->idx,
			((u64)low) & ~P4_CCCR_OVF);
	}

	return overflow;
}

static void p4_pmu_disable_pebs(void)
{
	/*
	 * FIXME
	 *
	 * It's still allowed that two threads setup same cache
	 * events so we can't simply clear metrics until we knew
	 * noone is depending on us, so we need kind of counter
	 * for "ReplayEvent" users.
	 *
	 * What is more complex -- RAW events, if user (for some
	 * reason) will pass some cache event metric with improper
	 * event opcode -- it's fine from hardware point of view
	 * but completely nonsence from "meaning" of such action.
	 *
	 * So at moment let leave metrics turned on forever -- it's
	 * ok for now but need to be revisited!
	 *
	 * (void)checking_wrmsrl(MSR_IA32_PEBS_ENABLE, (u64)0);
	 * (void)checking_wrmsrl(MSR_P4_PEBS_MATRIX_VERT, (u64)0);
	 */
}

static inline void p4_pmu_disable_event(struct perf_event *event)
{
	struct hw_perf_event *hwc = &event->hw;

	/*
	 * If event gets disabled while counter is in overflowed
	 * state we need to clear P4_CCCR_OVF, otherwise interrupt get
	 * asserted again and again
	 */
	(void)checking_wrmsrl(hwc->config_base + hwc->idx,
		(u64)(p4_config_unpack_cccr(hwc->config)) &
			~P4_CCCR_ENABLE & ~P4_CCCR_OVF & ~P4_CCCR_RESERVED);
}

static void p4_pmu_disable_all(void)
{
	struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
	int idx;

	for (idx = 0; idx < x86_pmu.num_counters; idx++) {
		struct perf_event *event = cpuc->events[idx];
		if (!test_bit(idx, cpuc->active_mask))
			continue;
		p4_pmu_disable_event(event);
	}

	p4_pmu_disable_pebs();
}

/* configuration must be valid */
static void p4_pmu_enable_pebs(u64 config)
{
	struct p4_pebs_bind *bind;
	unsigned int idx;

	BUILD_BUG_ON(P4_PEBS_METRIC__max > P4_PEBS_CONFIG_METRIC_MASK);

	idx = p4_config_unpack_metric(config);
	if (idx == P4_PEBS_METRIC__none)
		return;

	bind = &p4_pebs_bind_map[idx];

	(void)checking_wrmsrl(MSR_IA32_PEBS_ENABLE,	(u64)bind->metric_pebs);
	(void)checking_wrmsrl(MSR_P4_PEBS_MATRIX_VERT,	(u64)bind->metric_vert);
}

static void p4_pmu_enable_event(struct perf_event *event)
{
	struct hw_perf_event *hwc = &event->hw;
	int thread = p4_ht_config_thread(hwc->config);
	u64 escr_conf = p4_config_unpack_escr(p4_clear_ht_bit(hwc->config));
	unsigned int idx = p4_config_unpack_event(hwc->config);
	struct p4_event_bind *bind;
	u64 escr_addr, cccr;

	bind = &p4_event_bind_map[idx];
	escr_addr = (u64)bind->escr_msr[thread];

	/*
	 * - we dont support cascaded counters yet
	 * - and counter 1 is broken (erratum)
	 */
	WARN_ON_ONCE(p4_is_event_cascaded(hwc->config));
	WARN_ON_ONCE(hwc->idx == 1);

	/* we need a real Event value */
	escr_conf &= ~P4_ESCR_EVENT_MASK;
	escr_conf |= P4_ESCR_EVENT(P4_OPCODE_EVNT(bind->opcode));

	cccr = p4_config_unpack_cccr(hwc->config);

	/*
	 * it could be Cache event so we need to write metrics
	 * into additional MSRs
	 */
	p4_pmu_enable_pebs(hwc->config);

	(void)checking_wrmsrl(escr_addr, escr_conf);
	(void)checking_wrmsrl(hwc->config_base + hwc->idx,
				(cccr & ~P4_CCCR_RESERVED) | P4_CCCR_ENABLE);
}

static void p4_pmu_enable_all(int added)
{
	struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
	int idx;

	for (idx = 0; idx < x86_pmu.num_counters; idx++) {
		struct perf_event *event = cpuc->events[idx];
		if (!test_bit(idx, cpuc->active_mask))
			continue;
		p4_pmu_enable_event(event);
	}
}

static int p4_pmu_handle_irq(struct pt_regs *regs)
{
	struct perf_sample_data data;
	struct cpu_hw_events *cpuc;
	struct perf_event *event;
	struct hw_perf_event *hwc;
	int idx, handled = 0;
	u64 val;

	data.addr = 0;
	data.raw = NULL;

	cpuc = &__get_cpu_var(cpu_hw_events);

	for (idx = 0; idx < x86_pmu.num_counters; idx++) {
		int overflow;

		if (!test_bit(idx, cpuc->active_mask))
			continue;

		event = cpuc->events[idx];
		hwc = &event->hw;

		WARN_ON_ONCE(hwc->idx != idx);

		/* it might be unflagged overflow */
		overflow = p4_pmu_clear_cccr_ovf(hwc);

		val = x86_perf_event_update(event);
		if (!overflow && (val & (1ULL << (x86_pmu.cntval_bits - 1))))
			continue;

		handled += overflow;

		/* event overflow for sure */
		data.period = event->hw.last_period;

		if (!x86_perf_event_set_period(event))
			continue;
		if (perf_event_overflow(event, 1, &data, regs))
			p4_pmu_disable_event(event);
	}

	if (handled) {
		/* p4 quirk: unmask it again */
		apic_write(APIC_LVTPC, apic_read(APIC_LVTPC) & ~APIC_LVT_MASKED);
		inc_irq_stat(apic_perf_irqs);
	}

	return handled > 0;
}

/*
 * swap thread specific fields according to a thread
 * we are going to run on
 */
static void p4_pmu_swap_config_ts(struct hw_perf_event *hwc, int cpu)
{
	u32 escr, cccr;

	/*
	 * we either lucky and continue on same cpu or no HT support
	 */
	if (!p4_should_swap_ts(hwc->config, cpu))
		return;

	/*
	 * the event is migrated from an another logical
	 * cpu, so we need to swap thread specific flags
	 */

	escr = p4_config_unpack_escr(hwc->config);
	cccr = p4_config_unpack_cccr(hwc->config);

	if (p4_ht_thread(cpu)) {
		cccr &= ~P4_CCCR_OVF_PMI_T0;
		cccr |= P4_CCCR_OVF_PMI_T1;
		if (escr & P4_ESCR_T0_OS) {
			escr &= ~P4_ESCR_T0_OS;
			escr |= P4_ESCR_T1_OS;
		}
		if (escr & P4_ESCR_T0_USR) {
			escr &= ~P4_ESCR_T0_USR;
			escr |= P4_ESCR_T1_USR;
		}
		hwc->config  = p4_config_pack_escr(escr);
		hwc->config |= p4_config_pack_cccr(cccr);
		hwc->config |= P4_CONFIG_HT;
	} else {
		cccr &= ~P4_CCCR_OVF_PMI_T1;
		cccr |= P4_CCCR_OVF_PMI_T0;
		if (escr & P4_ESCR_T1_OS) {
			escr &= ~P4_ESCR_T1_OS;
			escr |= P4_ESCR_T0_OS;
		}
		if (escr & P4_ESCR_T1_USR) {
			escr &= ~P4_ESCR_T1_USR;
			escr |= P4_ESCR_T0_USR;
		}
		hwc->config  = p4_config_pack_escr(escr);
		hwc->config |= p4_config_pack_cccr(cccr);
		hwc->config &= ~P4_CONFIG_HT;
	}
}

/*
 * ESCR address hashing is tricky, ESCRs are not sequential
 * in memory but all starts from MSR_P4_BSU_ESCR0 (0x03a0) and
 * the metric between any ESCRs is laid in range [0xa0,0xe1]
 *
 * so we make ~70% filled hashtable
 */

#define P4_ESCR_MSR_BASE		0x000003a0
#define P4_ESCR_MSR_MAX			0x000003e1
#define P4_ESCR_MSR_TABLE_SIZE		(P4_ESCR_MSR_MAX - P4_ESCR_MSR_BASE + 1)
#define P4_ESCR_MSR_IDX(msr)		(msr - P4_ESCR_MSR_BASE)
#define P4_ESCR_MSR_TABLE_ENTRY(msr)	[P4_ESCR_MSR_IDX(msr)] = msr

static const unsigned int p4_escr_table[P4_ESCR_MSR_TABLE_SIZE] = {
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_ALF_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_ALF_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_BPU_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_BPU_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_BSU_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_BSU_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR2),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR3),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR4),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_CRU_ESCR5),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_DAC_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_DAC_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FIRM_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FIRM_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FLAME_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FLAME_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FSB_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_FSB_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IQ_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IQ_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IS_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IS_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_ITLB_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_ITLB_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IX_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_IX_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_MOB_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_MOB_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_MS_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_MS_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_PMH_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_PMH_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_RAT_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_RAT_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_SAAT_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_SAAT_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_SSU_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_SSU_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_TBPU_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_TBPU_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_TC_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_TC_ESCR1),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_U2L_ESCR0),
	P4_ESCR_MSR_TABLE_ENTRY(MSR_P4_U2L_ESCR1),
};

static int p4_get_escr_idx(unsigned int addr)
{
	unsigned int idx = P4_ESCR_MSR_IDX(addr);

	if (unlikely(idx >= P4_ESCR_MSR_TABLE_SIZE	||
			!p4_escr_table[idx]		||
			p4_escr_table[idx] != addr)) {
		WARN_ONCE(1, "P4 PMU: Wrong address passed: %x\n", addr);
		return -1;
	}

	return idx;
}

static int p4_next_cntr(int thread, unsigned long *used_mask,
			struct p4_event_bind *bind)
{
	int i, j;

	for (i = 0; i < P4_CNTR_LIMIT; i++) {
		j = bind->cntr[thread][i];
		if (j != -1 && !test_bit(j, used_mask))
			return j;
	}

	return -1;
}

static int p4_pmu_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
{
	unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
	unsigned long escr_mask[BITS_TO_LONGS(P4_ESCR_MSR_TABLE_SIZE)];
	int cpu = smp_processor_id();
	struct hw_perf_event *hwc;
	struct p4_event_bind *bind;
	unsigned int i, thread, num;
	int cntr_idx, escr_idx;

	bitmap_zero(used_mask, X86_PMC_IDX_MAX);
	bitmap_zero(escr_mask, P4_ESCR_MSR_TABLE_SIZE);

	for (i = 0, num = n; i < n; i++, num--) {

		hwc = &cpuc->event_list[i]->hw;
		thread = p4_ht_thread(cpu);
		bind = p4_config_get_bind(hwc->config);
		escr_idx = p4_get_escr_idx(bind->escr_msr[thread]);
		if (unlikely(escr_idx == -1))
			goto done;

		if (hwc->idx != -1 && !p4_should_swap_ts(hwc->config, cpu)) {
			cntr_idx = hwc->idx;
			if (assign)
				assign[i] = hwc->idx;
			goto reserve;
		}

		cntr_idx = p4_next_cntr(thread, used_mask, bind);
		if (cntr_idx == -1 || test_bit(escr_idx, escr_mask))
			goto done;

		p4_pmu_swap_config_ts(hwc, cpu);
		if (assign)
			assign[i] = cntr_idx;
reserve:
		set_bit(cntr_idx, used_mask);
		set_bit(escr_idx, escr_mask);
	}

done:
	return num ? -ENOSPC : 0;
}

static __initconst const struct x86_pmu p4_pmu = {
	.name			= "Netburst P4/Xeon",
	.handle_irq		= p4_pmu_handle_irq,
	.disable_all		= p4_pmu_disable_all,
	.enable_all		= p4_pmu_enable_all,
	.enable			= p4_pmu_enable_event,
	.disable		= p4_pmu_disable_event,
	.eventsel		= MSR_P4_BPU_CCCR0,
	.perfctr		= MSR_P4_BPU_PERFCTR0,
	.event_map		= p4_pmu_event_map,
	.max_events		= ARRAY_SIZE(p4_general_events),
	.get_event_constraints	= x86_get_event_constraints,
	/*
	 * IF HT disabled we may need to use all
	 * ARCH_P4_MAX_CCCR counters simulaneously
	 * though leave it restricted at moment assuming
	 * HT is on
	 */
	.num_counters		= ARCH_P4_MAX_CCCR,
	.apic			= 1,
	.cntval_bits		= 40,
	.cntval_mask		= (1ULL << 40) - 1,
	.max_period		= (1ULL << 39) - 1,
	.hw_config		= p4_hw_config,
	.schedule_events	= p4_pmu_schedule_events,
	/*
	 * This handles erratum N15 in intel doc 249199-029,
	 * the counter may not be updated correctly on write
	 * so we need a second write operation to do the trick
	 * (the official workaround didn't work)
	 *
	 * the former idea is taken from OProfile code
	 */
	.perfctr_second_write	= 1,
};

static __init int p4_pmu_init(void)
{
	unsigned int low, high;

	/* If we get stripped -- indexig fails */
	BUILD_BUG_ON(ARCH_P4_MAX_CCCR > X86_PMC_MAX_GENERIC);

	rdmsr(MSR_IA32_MISC_ENABLE, low, high);
	if (!(low & (1 << 7))) {
		pr_cont("unsupported Netburst CPU model %d ",
			boot_cpu_data.x86_model);
		return -ENODEV;
	}

	memcpy(hw_cache_event_ids, p4_hw_cache_event_ids,
		sizeof(hw_cache_event_ids));

	pr_cont("Netburst events, ");

	x86_pmu = p4_pmu;

	return 0;
}

#endif /* CONFIG_CPU_SUP_INTEL */