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Merge branch 'fix/hda' into for-linus
[deliverable/linux.git] / arch / powerpc / kernel / power5+-pmu.c
1 /*
2 * Performance counter support for POWER5+/++ (not POWER5) processors.
3 *
4 * Copyright 2009 Paul Mackerras, IBM Corporation.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11 #include <linux/kernel.h>
12 #include <linux/perf_counter.h>
13 #include <linux/string.h>
14 #include <asm/reg.h>
15 #include <asm/cputable.h>
16
17 /*
18 * Bits in event code for POWER5+ (POWER5 GS) and POWER5++ (POWER5 GS DD3)
19 */
20 #define PM_PMC_SH 20 /* PMC number (1-based) for direct events */
21 #define PM_PMC_MSK 0xf
22 #define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH)
23 #define PM_UNIT_SH 16 /* TTMMUX number and setting - unit select */
24 #define PM_UNIT_MSK 0xf
25 #define PM_BYTE_SH 12 /* Byte number of event bus to use */
26 #define PM_BYTE_MSK 7
27 #define PM_GRS_SH 8 /* Storage subsystem mux select */
28 #define PM_GRS_MSK 7
29 #define PM_BUSEVENT_MSK 0x80 /* Set if event uses event bus */
30 #define PM_PMCSEL_MSK 0x7f
31
32 /* Values in PM_UNIT field */
33 #define PM_FPU 0
34 #define PM_ISU0 1
35 #define PM_IFU 2
36 #define PM_ISU1 3
37 #define PM_IDU 4
38 #define PM_ISU0_ALT 6
39 #define PM_GRS 7
40 #define PM_LSU0 8
41 #define PM_LSU1 0xc
42 #define PM_LASTUNIT 0xc
43
44 /*
45 * Bits in MMCR1 for POWER5+
46 */
47 #define MMCR1_TTM0SEL_SH 62
48 #define MMCR1_TTM1SEL_SH 60
49 #define MMCR1_TTM2SEL_SH 58
50 #define MMCR1_TTM3SEL_SH 56
51 #define MMCR1_TTMSEL_MSK 3
52 #define MMCR1_TD_CP_DBG0SEL_SH 54
53 #define MMCR1_TD_CP_DBG1SEL_SH 52
54 #define MMCR1_TD_CP_DBG2SEL_SH 50
55 #define MMCR1_TD_CP_DBG3SEL_SH 48
56 #define MMCR1_GRS_L2SEL_SH 46
57 #define MMCR1_GRS_L2SEL_MSK 3
58 #define MMCR1_GRS_L3SEL_SH 44
59 #define MMCR1_GRS_L3SEL_MSK 3
60 #define MMCR1_GRS_MCSEL_SH 41
61 #define MMCR1_GRS_MCSEL_MSK 7
62 #define MMCR1_GRS_FABSEL_SH 39
63 #define MMCR1_GRS_FABSEL_MSK 3
64 #define MMCR1_PMC1_ADDER_SEL_SH 35
65 #define MMCR1_PMC2_ADDER_SEL_SH 34
66 #define MMCR1_PMC3_ADDER_SEL_SH 33
67 #define MMCR1_PMC4_ADDER_SEL_SH 32
68 #define MMCR1_PMC1SEL_SH 25
69 #define MMCR1_PMC2SEL_SH 17
70 #define MMCR1_PMC3SEL_SH 9
71 #define MMCR1_PMC4SEL_SH 1
72 #define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8)
73 #define MMCR1_PMCSEL_MSK 0x7f
74
75 /*
76 * Bits in MMCRA
77 */
78
79 /*
80 * Layout of constraint bits:
81 * 6666555555555544444444443333333333222222222211111111110000000000
82 * 3210987654321098765432109876543210987654321098765432109876543210
83 * [ ><><>< ><> <><>[ > < >< >< >< ><><><><><><>
84 * NC G0G1G2 G3 T0T1 UC B0 B1 B2 B3 P6P5P4P3P2P1
85 *
86 * NC - number of counters
87 * 51: NC error 0x0008_0000_0000_0000
88 * 48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
89 *
90 * G0..G3 - GRS mux constraints
91 * 46-47: GRS_L2SEL value
92 * 44-45: GRS_L3SEL value
93 * 41-44: GRS_MCSEL value
94 * 39-40: GRS_FABSEL value
95 * Note that these match up with their bit positions in MMCR1
96 *
97 * T0 - TTM0 constraint
98 * 36-37: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0x30_0000_0000
99 *
100 * T1 - TTM1 constraint
101 * 34-35: TTM1SEL value (0=IDU, 3=GRS) 0x0c_0000_0000
102 *
103 * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
104 * 33: UC3 error 0x02_0000_0000
105 * 32: FPU|IFU|ISU1 events needed 0x01_0000_0000
106 * 31: ISU0 events needed 0x01_8000_0000
107 * 30: IDU|GRS events needed 0x00_4000_0000
108 *
109 * B0
110 * 24-27: Byte 0 event source 0x0f00_0000
111 * Encoding as for the event code
112 *
113 * B1, B2, B3
114 * 20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
115 *
116 * P6
117 * 11: P6 error 0x800
118 * 10-11: Count of events needing PMC6
119 *
120 * P1..P5
121 * 0-9: Count of events needing PMC1..PMC5
122 */
123
124 static const int grsel_shift[8] = {
125 MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
126 MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
127 MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
128 };
129
130 /* Masks and values for using events from the various units */
131 static unsigned long unit_cons[PM_LASTUNIT+1][2] = {
132 [PM_FPU] = { 0x3200000000ul, 0x0100000000ul },
133 [PM_ISU0] = { 0x0200000000ul, 0x0080000000ul },
134 [PM_ISU1] = { 0x3200000000ul, 0x3100000000ul },
135 [PM_IFU] = { 0x3200000000ul, 0x2100000000ul },
136 [PM_IDU] = { 0x0e00000000ul, 0x0040000000ul },
137 [PM_GRS] = { 0x0e00000000ul, 0x0c40000000ul },
138 };
139
140 static int power5p_get_constraint(u64 event, unsigned long *maskp,
141 unsigned long *valp)
142 {
143 int pmc, byte, unit, sh;
144 int bit, fmask;
145 unsigned long mask = 0, value = 0;
146
147 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
148 if (pmc) {
149 if (pmc > 6)
150 return -1;
151 sh = (pmc - 1) * 2;
152 mask |= 2 << sh;
153 value |= 1 << sh;
154 if (pmc >= 5 && !(event == 0x500009 || event == 0x600005))
155 return -1;
156 }
157 if (event & PM_BUSEVENT_MSK) {
158 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
159 if (unit > PM_LASTUNIT)
160 return -1;
161 if (unit == PM_ISU0_ALT)
162 unit = PM_ISU0;
163 mask |= unit_cons[unit][0];
164 value |= unit_cons[unit][1];
165 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
166 if (byte >= 4) {
167 if (unit != PM_LSU1)
168 return -1;
169 /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
170 ++unit;
171 byte &= 3;
172 }
173 if (unit == PM_GRS) {
174 bit = event & 7;
175 fmask = (bit == 6)? 7: 3;
176 sh = grsel_shift[bit];
177 mask |= (unsigned long)fmask << sh;
178 value |= (unsigned long)((event >> PM_GRS_SH) & fmask)
179 << sh;
180 }
181 /* Set byte lane select field */
182 mask |= 0xfUL << (24 - 4 * byte);
183 value |= (unsigned long)unit << (24 - 4 * byte);
184 }
185 if (pmc < 5) {
186 /* need a counter from PMC1-4 set */
187 mask |= 0x8000000000000ul;
188 value |= 0x1000000000000ul;
189 }
190 *maskp = mask;
191 *valp = value;
192 return 0;
193 }
194
195 static int power5p_limited_pmc_event(u64 event)
196 {
197 int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
198
199 return pmc == 5 || pmc == 6;
200 }
201
202 #define MAX_ALT 3 /* at most 3 alternatives for any event */
203
204 static const unsigned int event_alternatives[][MAX_ALT] = {
205 { 0x100c0, 0x40001f }, /* PM_GCT_FULL_CYC */
206 { 0x120e4, 0x400002 }, /* PM_GRP_DISP_REJECT */
207 { 0x230e2, 0x323087 }, /* PM_BR_PRED_CR */
208 { 0x230e3, 0x223087, 0x3230a0 }, /* PM_BR_PRED_TA */
209 { 0x410c7, 0x441084 }, /* PM_THRD_L2MISS_BOTH_CYC */
210 { 0x800c4, 0xc20e0 }, /* PM_DTLB_MISS */
211 { 0xc50c6, 0xc60e0 }, /* PM_MRK_DTLB_MISS */
212 { 0x100005, 0x600005 }, /* PM_RUN_CYC */
213 { 0x100009, 0x200009 }, /* PM_INST_CMPL */
214 { 0x200015, 0x300015 }, /* PM_LSU_LMQ_SRQ_EMPTY_CYC */
215 { 0x300009, 0x400009 }, /* PM_INST_DISP */
216 };
217
218 /*
219 * Scan the alternatives table for a match and return the
220 * index into the alternatives table if found, else -1.
221 */
222 static int find_alternative(unsigned int event)
223 {
224 int i, j;
225
226 for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
227 if (event < event_alternatives[i][0])
228 break;
229 for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
230 if (event == event_alternatives[i][j])
231 return i;
232 }
233 return -1;
234 }
235
236 static const unsigned char bytedecode_alternatives[4][4] = {
237 /* PMC 1 */ { 0x21, 0x23, 0x25, 0x27 },
238 /* PMC 2 */ { 0x07, 0x17, 0x0e, 0x1e },
239 /* PMC 3 */ { 0x20, 0x22, 0x24, 0x26 },
240 /* PMC 4 */ { 0x07, 0x17, 0x0e, 0x1e }
241 };
242
243 /*
244 * Some direct events for decodes of event bus byte 3 have alternative
245 * PMCSEL values on other counters. This returns the alternative
246 * event code for those that do, or -1 otherwise. This also handles
247 * alternative PCMSEL values for add events.
248 */
249 static s64 find_alternative_bdecode(u64 event)
250 {
251 int pmc, altpmc, pp, j;
252
253 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
254 if (pmc == 0 || pmc > 4)
255 return -1;
256 altpmc = 5 - pmc; /* 1 <-> 4, 2 <-> 3 */
257 pp = event & PM_PMCSEL_MSK;
258 for (j = 0; j < 4; ++j) {
259 if (bytedecode_alternatives[pmc - 1][j] == pp) {
260 return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
261 (altpmc << PM_PMC_SH) |
262 bytedecode_alternatives[altpmc - 1][j];
263 }
264 }
265
266 /* new decode alternatives for power5+ */
267 if (pmc == 1 && (pp == 0x0d || pp == 0x0e))
268 return event + (2 << PM_PMC_SH) + (0x2e - 0x0d);
269 if (pmc == 3 && (pp == 0x2e || pp == 0x2f))
270 return event - (2 << PM_PMC_SH) - (0x2e - 0x0d);
271
272 /* alternative add event encodings */
273 if (pp == 0x10 || pp == 0x28)
274 return ((event ^ (0x10 ^ 0x28)) & ~PM_PMC_MSKS) |
275 (altpmc << PM_PMC_SH);
276
277 return -1;
278 }
279
280 static int power5p_get_alternatives(u64 event, unsigned int flags, u64 alt[])
281 {
282 int i, j, nalt = 1;
283 int nlim;
284 s64 ae;
285
286 alt[0] = event;
287 nalt = 1;
288 nlim = power5p_limited_pmc_event(event);
289 i = find_alternative(event);
290 if (i >= 0) {
291 for (j = 0; j < MAX_ALT; ++j) {
292 ae = event_alternatives[i][j];
293 if (ae && ae != event)
294 alt[nalt++] = ae;
295 nlim += power5p_limited_pmc_event(ae);
296 }
297 } else {
298 ae = find_alternative_bdecode(event);
299 if (ae > 0)
300 alt[nalt++] = ae;
301 }
302
303 if (flags & PPMU_ONLY_COUNT_RUN) {
304 /*
305 * We're only counting in RUN state,
306 * so PM_CYC is equivalent to PM_RUN_CYC
307 * and PM_INST_CMPL === PM_RUN_INST_CMPL.
308 * This doesn't include alternatives that don't provide
309 * any extra flexibility in assigning PMCs (e.g.
310 * 0x100005 for PM_RUN_CYC vs. 0xf for PM_CYC).
311 * Note that even with these additional alternatives
312 * we never end up with more than 3 alternatives for any event.
313 */
314 j = nalt;
315 for (i = 0; i < nalt; ++i) {
316 switch (alt[i]) {
317 case 0xf: /* PM_CYC */
318 alt[j++] = 0x600005; /* PM_RUN_CYC */
319 ++nlim;
320 break;
321 case 0x600005: /* PM_RUN_CYC */
322 alt[j++] = 0xf;
323 break;
324 case 0x100009: /* PM_INST_CMPL */
325 alt[j++] = 0x500009; /* PM_RUN_INST_CMPL */
326 ++nlim;
327 break;
328 case 0x500009: /* PM_RUN_INST_CMPL */
329 alt[j++] = 0x100009; /* PM_INST_CMPL */
330 alt[j++] = 0x200009;
331 break;
332 }
333 }
334 nalt = j;
335 }
336
337 if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) {
338 /* remove the limited PMC events */
339 j = 0;
340 for (i = 0; i < nalt; ++i) {
341 if (!power5p_limited_pmc_event(alt[i])) {
342 alt[j] = alt[i];
343 ++j;
344 }
345 }
346 nalt = j;
347 } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) {
348 /* remove all but the limited PMC events */
349 j = 0;
350 for (i = 0; i < nalt; ++i) {
351 if (power5p_limited_pmc_event(alt[i])) {
352 alt[j] = alt[i];
353 ++j;
354 }
355 }
356 nalt = j;
357 }
358
359 return nalt;
360 }
361
362 /*
363 * Map of which direct events on which PMCs are marked instruction events.
364 * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
365 * Bit 0 is set if it is marked for all PMCs.
366 * The 0x80 bit indicates a byte decode PMCSEL value.
367 */
368 static unsigned char direct_event_is_marked[0x28] = {
369 0, /* 00 */
370 0x1f, /* 01 PM_IOPS_CMPL */
371 0x2, /* 02 PM_MRK_GRP_DISP */
372 0xe, /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
373 0, /* 04 */
374 0x1c, /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
375 0x80, /* 06 */
376 0x80, /* 07 */
377 0, 0, 0,/* 08 - 0a */
378 0x18, /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
379 0, /* 0c */
380 0x80, /* 0d */
381 0x80, /* 0e */
382 0, /* 0f */
383 0, /* 10 */
384 0x14, /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
385 0, /* 12 */
386 0x10, /* 13 PM_MRK_GRP_CMPL */
387 0x1f, /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
388 0x2, /* 15 PM_MRK_GRP_ISSUED */
389 0x80, /* 16 */
390 0x80, /* 17 */
391 0, 0, 0, 0, 0,
392 0x80, /* 1d */
393 0x80, /* 1e */
394 0, /* 1f */
395 0x80, /* 20 */
396 0x80, /* 21 */
397 0x80, /* 22 */
398 0x80, /* 23 */
399 0x80, /* 24 */
400 0x80, /* 25 */
401 0x80, /* 26 */
402 0x80, /* 27 */
403 };
404
405 /*
406 * Returns 1 if event counts things relating to marked instructions
407 * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
408 */
409 static int power5p_marked_instr_event(u64 event)
410 {
411 int pmc, psel;
412 int bit, byte, unit;
413 u32 mask;
414
415 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
416 psel = event & PM_PMCSEL_MSK;
417 if (pmc >= 5)
418 return 0;
419
420 bit = -1;
421 if (psel < sizeof(direct_event_is_marked)) {
422 if (direct_event_is_marked[psel] & (1 << pmc))
423 return 1;
424 if (direct_event_is_marked[psel] & 0x80)
425 bit = 4;
426 else if (psel == 0x08)
427 bit = pmc - 1;
428 else if (psel == 0x10)
429 bit = 4 - pmc;
430 else if (psel == 0x1b && (pmc == 1 || pmc == 3))
431 bit = 4;
432 } else if ((psel & 0x48) == 0x40) {
433 bit = psel & 7;
434 } else if (psel == 0x28) {
435 bit = pmc - 1;
436 } else if (pmc == 3 && (psel == 0x2e || psel == 0x2f)) {
437 bit = 4;
438 }
439
440 if (!(event & PM_BUSEVENT_MSK) || bit == -1)
441 return 0;
442
443 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
444 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
445 if (unit == PM_LSU0) {
446 /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
447 mask = 0x5dff00;
448 } else if (unit == PM_LSU1 && byte >= 4) {
449 byte -= 4;
450 /* byte 5 bits 6-7, byte 6 bits 0,4, byte 7 bits 0-4,6 */
451 mask = 0x5f11c000;
452 } else
453 return 0;
454
455 return (mask >> (byte * 8 + bit)) & 1;
456 }
457
458 static int power5p_compute_mmcr(u64 event[], int n_ev,
459 unsigned int hwc[], unsigned long mmcr[])
460 {
461 unsigned long mmcr1 = 0;
462 unsigned long mmcra = 0;
463 unsigned int pmc, unit, byte, psel;
464 unsigned int ttm;
465 int i, isbus, bit, grsel;
466 unsigned int pmc_inuse = 0;
467 unsigned char busbyte[4];
468 unsigned char unituse[16];
469 int ttmuse;
470
471 if (n_ev > 6)
472 return -1;
473
474 /* First pass to count resource use */
475 memset(busbyte, 0, sizeof(busbyte));
476 memset(unituse, 0, sizeof(unituse));
477 for (i = 0; i < n_ev; ++i) {
478 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
479 if (pmc) {
480 if (pmc > 6)
481 return -1;
482 if (pmc_inuse & (1 << (pmc - 1)))
483 return -1;
484 pmc_inuse |= 1 << (pmc - 1);
485 }
486 if (event[i] & PM_BUSEVENT_MSK) {
487 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
488 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
489 if (unit > PM_LASTUNIT)
490 return -1;
491 if (unit == PM_ISU0_ALT)
492 unit = PM_ISU0;
493 if (byte >= 4) {
494 if (unit != PM_LSU1)
495 return -1;
496 ++unit;
497 byte &= 3;
498 }
499 if (busbyte[byte] && busbyte[byte] != unit)
500 return -1;
501 busbyte[byte] = unit;
502 unituse[unit] = 1;
503 }
504 }
505
506 /*
507 * Assign resources and set multiplexer selects.
508 *
509 * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
510 * choice we have to deal with.
511 */
512 if (unituse[PM_ISU0] &
513 (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
514 unituse[PM_ISU0_ALT] = 1; /* move ISU to TTM1 */
515 unituse[PM_ISU0] = 0;
516 }
517 /* Set TTM[01]SEL fields. */
518 ttmuse = 0;
519 for (i = PM_FPU; i <= PM_ISU1; ++i) {
520 if (!unituse[i])
521 continue;
522 if (ttmuse++)
523 return -1;
524 mmcr1 |= (unsigned long)i << MMCR1_TTM0SEL_SH;
525 }
526 ttmuse = 0;
527 for (; i <= PM_GRS; ++i) {
528 if (!unituse[i])
529 continue;
530 if (ttmuse++)
531 return -1;
532 mmcr1 |= (unsigned long)(i & 3) << MMCR1_TTM1SEL_SH;
533 }
534 if (ttmuse > 1)
535 return -1;
536
537 /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
538 for (byte = 0; byte < 4; ++byte) {
539 unit = busbyte[byte];
540 if (!unit)
541 continue;
542 if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
543 /* get ISU0 through TTM1 rather than TTM0 */
544 unit = PM_ISU0_ALT;
545 } else if (unit == PM_LSU1 + 1) {
546 /* select lower word of LSU1 for this byte */
547 mmcr1 |= 1ul << (MMCR1_TTM3SEL_SH + 3 - byte);
548 }
549 ttm = unit >> 2;
550 mmcr1 |= (unsigned long)ttm
551 << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
552 }
553
554 /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
555 for (i = 0; i < n_ev; ++i) {
556 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
557 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
558 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
559 psel = event[i] & PM_PMCSEL_MSK;
560 isbus = event[i] & PM_BUSEVENT_MSK;
561 if (!pmc) {
562 /* Bus event or any-PMC direct event */
563 for (pmc = 0; pmc < 4; ++pmc) {
564 if (!(pmc_inuse & (1 << pmc)))
565 break;
566 }
567 if (pmc >= 4)
568 return -1;
569 pmc_inuse |= 1 << pmc;
570 } else if (pmc <= 4) {
571 /* Direct event */
572 --pmc;
573 if (isbus && (byte & 2) &&
574 (psel == 8 || psel == 0x10 || psel == 0x28))
575 /* add events on higher-numbered bus */
576 mmcr1 |= 1ul << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
577 } else {
578 /* Instructions or run cycles on PMC5/6 */
579 --pmc;
580 }
581 if (isbus && unit == PM_GRS) {
582 bit = psel & 7;
583 grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
584 mmcr1 |= (unsigned long)grsel << grsel_shift[bit];
585 }
586 if (power5p_marked_instr_event(event[i]))
587 mmcra |= MMCRA_SAMPLE_ENABLE;
588 if ((psel & 0x58) == 0x40 && (byte & 1) != ((pmc >> 1) & 1))
589 /* select alternate byte lane */
590 psel |= 0x10;
591 if (pmc <= 3)
592 mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
593 hwc[i] = pmc;
594 }
595
596 /* Return MMCRx values */
597 mmcr[0] = 0;
598 if (pmc_inuse & 1)
599 mmcr[0] = MMCR0_PMC1CE;
600 if (pmc_inuse & 0x3e)
601 mmcr[0] |= MMCR0_PMCjCE;
602 mmcr[1] = mmcr1;
603 mmcr[2] = mmcra;
604 return 0;
605 }
606
607 static void power5p_disable_pmc(unsigned int pmc, unsigned long mmcr[])
608 {
609 if (pmc <= 3)
610 mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
611 }
612
613 static int power5p_generic_events[] = {
614 [PERF_COUNT_HW_CPU_CYCLES] = 0xf,
615 [PERF_COUNT_HW_INSTRUCTIONS] = 0x100009,
616 [PERF_COUNT_HW_CACHE_REFERENCES] = 0x1c10a8, /* LD_REF_L1 */
617 [PERF_COUNT_HW_CACHE_MISSES] = 0x3c1088, /* LD_MISS_L1 */
618 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x230e4, /* BR_ISSUED */
619 [PERF_COUNT_HW_BRANCH_MISSES] = 0x230e5, /* BR_MPRED_CR */
620 };
621
622 #define C(x) PERF_COUNT_HW_CACHE_##x
623
624 /*
625 * Table of generalized cache-related events.
626 * 0 means not supported, -1 means nonsensical, other values
627 * are event codes.
628 */
629 static int power5p_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
630 [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
631 [C(OP_READ)] = { 0x1c10a8, 0x3c1088 },
632 [C(OP_WRITE)] = { 0x2c10a8, 0xc10c3 },
633 [C(OP_PREFETCH)] = { 0xc70e7, -1 },
634 },
635 [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
636 [C(OP_READ)] = { 0, 0 },
637 [C(OP_WRITE)] = { -1, -1 },
638 [C(OP_PREFETCH)] = { 0, 0 },
639 },
640 [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
641 [C(OP_READ)] = { 0, 0 },
642 [C(OP_WRITE)] = { 0, 0 },
643 [C(OP_PREFETCH)] = { 0xc50c3, 0 },
644 },
645 [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
646 [C(OP_READ)] = { 0xc20e4, 0x800c4 },
647 [C(OP_WRITE)] = { -1, -1 },
648 [C(OP_PREFETCH)] = { -1, -1 },
649 },
650 [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
651 [C(OP_READ)] = { 0, 0x800c0 },
652 [C(OP_WRITE)] = { -1, -1 },
653 [C(OP_PREFETCH)] = { -1, -1 },
654 },
655 [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
656 [C(OP_READ)] = { 0x230e4, 0x230e5 },
657 [C(OP_WRITE)] = { -1, -1 },
658 [C(OP_PREFETCH)] = { -1, -1 },
659 },
660 };
661
662 static struct power_pmu power5p_pmu = {
663 .name = "POWER5+/++",
664 .n_counter = 6,
665 .max_alternatives = MAX_ALT,
666 .add_fields = 0x7000000000055ul,
667 .test_adder = 0x3000040000000ul,
668 .compute_mmcr = power5p_compute_mmcr,
669 .get_constraint = power5p_get_constraint,
670 .get_alternatives = power5p_get_alternatives,
671 .disable_pmc = power5p_disable_pmc,
672 .limited_pmc_event = power5p_limited_pmc_event,
673 .flags = PPMU_LIMITED_PMC5_6,
674 .n_generic = ARRAY_SIZE(power5p_generic_events),
675 .generic_events = power5p_generic_events,
676 .cache_events = &power5p_cache_events,
677 };
678
679 static int init_power5p_pmu(void)
680 {
681 if (!cur_cpu_spec->oprofile_cpu_type ||
682 (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5+")
683 && strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5++")))
684 return -ENODEV;
685
686 return register_power_pmu(&power5p_pmu);
687 }
688
689 arch_initcall(init_power5p_pmu);
Linux kernel - Deliverables
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