1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Performance counter support for POWER5+/++ (not POWER5) processors.
4 *
5 * Copyright 2009 Paul Mackerras, IBM Corporation.
6 */
7 #include <linux/kernel.h>
8 #include <linux/perf_event.h>
9 #include <linux/string.h>
10 #include <asm/reg.h>
11 #include <asm/cputable.h>
12
13 /*
14 * Bits in event code for POWER5+ (POWER5 GS) and POWER5++ (POWER5 GS DD3)
15 */
16 #define PM_PMC_SH 20 /* PMC number (1-based) for direct events */
17 #define PM_PMC_MSK 0xf
18 #define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH)
19 #define PM_UNIT_SH 16 /* TTMMUX number and setting - unit select */
20 #define PM_UNIT_MSK 0xf
21 #define PM_BYTE_SH 12 /* Byte number of event bus to use */
22 #define PM_BYTE_MSK 7
23 #define PM_GRS_SH 8 /* Storage subsystem mux select */
24 #define PM_GRS_MSK 7
25 #define PM_BUSEVENT_MSK 0x80 /* Set if event uses event bus */
26 #define PM_PMCSEL_MSK 0x7f
27
28 /* Values in PM_UNIT field */
29 #define PM_FPU 0
30 #define PM_ISU0 1
31 #define PM_IFU 2
32 #define PM_ISU1 3
33 #define PM_IDU 4
34 #define PM_ISU0_ALT 6
35 #define PM_GRS 7
36 #define PM_LSU0 8
37 #define PM_LSU1 0xc
38 #define PM_LASTUNIT 0xc
39
40 /*
41 * Bits in MMCR1 for POWER5+
42 */
43 #define MMCR1_TTM0SEL_SH 62
44 #define MMCR1_TTM1SEL_SH 60
45 #define MMCR1_TTM2SEL_SH 58
46 #define MMCR1_TTM3SEL_SH 56
47 #define MMCR1_TTMSEL_MSK 3
48 #define MMCR1_TD_CP_DBG0SEL_SH 54
49 #define MMCR1_TD_CP_DBG1SEL_SH 52
50 #define MMCR1_TD_CP_DBG2SEL_SH 50
51 #define MMCR1_TD_CP_DBG3SEL_SH 48
52 #define MMCR1_GRS_L2SEL_SH 46
53 #define MMCR1_GRS_L2SEL_MSK 3
54 #define MMCR1_GRS_L3SEL_SH 44
55 #define MMCR1_GRS_L3SEL_MSK 3
56 #define MMCR1_GRS_MCSEL_SH 41
57 #define MMCR1_GRS_MCSEL_MSK 7
58 #define MMCR1_GRS_FABSEL_SH 39
59 #define MMCR1_GRS_FABSEL_MSK 3
60 #define MMCR1_PMC1_ADDER_SEL_SH 35
61 #define MMCR1_PMC2_ADDER_SEL_SH 34
62 #define MMCR1_PMC3_ADDER_SEL_SH 33
63 #define MMCR1_PMC4_ADDER_SEL_SH 32
64 #define MMCR1_PMC1SEL_SH 25
65 #define MMCR1_PMC2SEL_SH 17
66 #define MMCR1_PMC3SEL_SH 9
67 #define MMCR1_PMC4SEL_SH 1
68 #define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8)
69 #define MMCR1_PMCSEL_MSK 0x7f
70
71 /*
72 * Layout of constraint bits:
73 * 6666555555555544444444443333333333222222222211111111110000000000
74 * 3210987654321098765432109876543210987654321098765432109876543210
75 * [ ><><>< ><> <><>[ > < >< >< >< ><><><><><><>
76 * NC G0G1G2 G3 T0T1 UC B0 B1 B2 B3 P6P5P4P3P2P1
77 *
78 * NC - number of counters
79 * 51: NC error 0x0008_0000_0000_0000
80 * 48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
81 *
82 * G0..G3 - GRS mux constraints
83 * 46-47: GRS_L2SEL value
84 * 44-45: GRS_L3SEL value
85 * 41-44: GRS_MCSEL value
86 * 39-40: GRS_FABSEL value
87 * Note that these match up with their bit positions in MMCR1
88 *
89 * T0 - TTM0 constraint
90 * 36-37: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0x30_0000_0000
91 *
92 * T1 - TTM1 constraint
93 * 34-35: TTM1SEL value (0=IDU, 3=GRS) 0x0c_0000_0000
94 *
95 * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
96 * 33: UC3 error 0x02_0000_0000
97 * 32: FPU|IFU|ISU1 events needed 0x01_0000_0000
98 * 31: ISU0 events needed 0x01_8000_0000
99 * 30: IDU|GRS events needed 0x00_4000_0000
100 *
101 * B0
102 * 24-27: Byte 0 event source 0x0f00_0000
103 * Encoding as for the event code
104 *
105 * B1, B2, B3
106 * 20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
107 *
108 * P6
109 * 11: P6 error 0x800
110 * 10-11: Count of events needing PMC6
111 *
112 * P1..P5
113 * 0-9: Count of events needing PMC1..PMC5
114 */
115
116 static const int grsel_shift[8] = {
117 MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
118 MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
119 MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
120 };
121
122 /* Masks and values for using events from the various units */
123 static unsigned long unit_cons[PM_LASTUNIT+1][2] = {
124 [PM_FPU] = { 0x3200000000ul, 0x0100000000ul },
125 [PM_ISU0] = { 0x0200000000ul, 0x0080000000ul },
126 [PM_ISU1] = { 0x3200000000ul, 0x3100000000ul },
127 [PM_IFU] = { 0x3200000000ul, 0x2100000000ul },
128 [PM_IDU] = { 0x0e00000000ul, 0x0040000000ul },
129 [PM_GRS] = { 0x0e00000000ul, 0x0c40000000ul },
130 };
131
power5p_get_constraint(u64 event,unsigned long * maskp,unsigned long * valp)132 static int power5p_get_constraint(u64 event, unsigned long *maskp,
133 unsigned long *valp)
134 {
135 int pmc, byte, unit, sh;
136 int bit, fmask;
137 unsigned long mask = 0, value = 0;
138
139 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
140 if (pmc) {
141 if (pmc > 6)
142 return -1;
143 sh = (pmc - 1) * 2;
144 mask |= 2 << sh;
145 value |= 1 << sh;
146 if (pmc >= 5 && !(event == 0x500009 || event == 0x600005))
147 return -1;
148 }
149 if (event & PM_BUSEVENT_MSK) {
150 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
151 if (unit > PM_LASTUNIT)
152 return -1;
153 if (unit == PM_ISU0_ALT)
154 unit = PM_ISU0;
155 mask |= unit_cons[unit][0];
156 value |= unit_cons[unit][1];
157 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
158 if (byte >= 4) {
159 if (unit != PM_LSU1)
160 return -1;
161 /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
162 ++unit;
163 byte &= 3;
164 }
165 if (unit == PM_GRS) {
166 bit = event & 7;
167 fmask = (bit == 6)? 7: 3;
168 sh = grsel_shift[bit];
169 mask |= (unsigned long)fmask << sh;
170 value |= (unsigned long)((event >> PM_GRS_SH) & fmask)
171 << sh;
172 }
173 /* Set byte lane select field */
174 mask |= 0xfUL << (24 - 4 * byte);
175 value |= (unsigned long)unit << (24 - 4 * byte);
176 }
177 if (pmc < 5) {
178 /* need a counter from PMC1-4 set */
179 mask |= 0x8000000000000ul;
180 value |= 0x1000000000000ul;
181 }
182 *maskp = mask;
183 *valp = value;
184 return 0;
185 }
186
power5p_limited_pmc_event(u64 event)187 static int power5p_limited_pmc_event(u64 event)
188 {
189 int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
190
191 return pmc == 5 || pmc == 6;
192 }
193
194 #define MAX_ALT 3 /* at most 3 alternatives for any event */
195
196 static const unsigned int event_alternatives[][MAX_ALT] = {
197 { 0x100c0, 0x40001f }, /* PM_GCT_FULL_CYC */
198 { 0x120e4, 0x400002 }, /* PM_GRP_DISP_REJECT */
199 { 0x230e2, 0x323087 }, /* PM_BR_PRED_CR */
200 { 0x230e3, 0x223087, 0x3230a0 }, /* PM_BR_PRED_TA */
201 { 0x410c7, 0x441084 }, /* PM_THRD_L2MISS_BOTH_CYC */
202 { 0x800c4, 0xc20e0 }, /* PM_DTLB_MISS */
203 { 0xc50c6, 0xc60e0 }, /* PM_MRK_DTLB_MISS */
204 { 0x100005, 0x600005 }, /* PM_RUN_CYC */
205 { 0x100009, 0x200009 }, /* PM_INST_CMPL */
206 { 0x200015, 0x300015 }, /* PM_LSU_LMQ_SRQ_EMPTY_CYC */
207 { 0x300009, 0x400009 }, /* PM_INST_DISP */
208 };
209
210 /*
211 * Scan the alternatives table for a match and return the
212 * index into the alternatives table if found, else -1.
213 */
find_alternative(unsigned int event)214 static int find_alternative(unsigned int event)
215 {
216 int i, j;
217
218 for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
219 if (event < event_alternatives[i][0])
220 break;
221 for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
222 if (event == event_alternatives[i][j])
223 return i;
224 }
225 return -1;
226 }
227
228 static const unsigned char bytedecode_alternatives[4][4] = {
229 /* PMC 1 */ { 0x21, 0x23, 0x25, 0x27 },
230 /* PMC 2 */ { 0x07, 0x17, 0x0e, 0x1e },
231 /* PMC 3 */ { 0x20, 0x22, 0x24, 0x26 },
232 /* PMC 4 */ { 0x07, 0x17, 0x0e, 0x1e }
233 };
234
235 /*
236 * Some direct events for decodes of event bus byte 3 have alternative
237 * PMCSEL values on other counters. This returns the alternative
238 * event code for those that do, or -1 otherwise. This also handles
239 * alternative PCMSEL values for add events.
240 */
find_alternative_bdecode(u64 event)241 static s64 find_alternative_bdecode(u64 event)
242 {
243 int pmc, altpmc, pp, j;
244
245 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
246 if (pmc == 0 || pmc > 4)
247 return -1;
248 altpmc = 5 - pmc; /* 1 <-> 4, 2 <-> 3 */
249 pp = event & PM_PMCSEL_MSK;
250 for (j = 0; j < 4; ++j) {
251 if (bytedecode_alternatives[pmc - 1][j] == pp) {
252 return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
253 (altpmc << PM_PMC_SH) |
254 bytedecode_alternatives[altpmc - 1][j];
255 }
256 }
257
258 /* new decode alternatives for power5+ */
259 if (pmc == 1 && (pp == 0x0d || pp == 0x0e))
260 return event + (2 << PM_PMC_SH) + (0x2e - 0x0d);
261 if (pmc == 3 && (pp == 0x2e || pp == 0x2f))
262 return event - (2 << PM_PMC_SH) - (0x2e - 0x0d);
263
264 /* alternative add event encodings */
265 if (pp == 0x10 || pp == 0x28)
266 return ((event ^ (0x10 ^ 0x28)) & ~PM_PMC_MSKS) |
267 (altpmc << PM_PMC_SH);
268
269 return -1;
270 }
271
power5p_get_alternatives(u64 event,unsigned int flags,u64 alt[])272 static int power5p_get_alternatives(u64 event, unsigned int flags, u64 alt[])
273 {
274 int i, j, nalt = 1;
275 int nlim;
276 s64 ae;
277
278 alt[0] = event;
279 nalt = 1;
280 nlim = power5p_limited_pmc_event(event);
281 i = find_alternative(event);
282 if (i >= 0) {
283 for (j = 0; j < MAX_ALT; ++j) {
284 ae = event_alternatives[i][j];
285 if (ae && ae != event)
286 alt[nalt++] = ae;
287 nlim += power5p_limited_pmc_event(ae);
288 }
289 } else {
290 ae = find_alternative_bdecode(event);
291 if (ae > 0)
292 alt[nalt++] = ae;
293 }
294
295 if (flags & PPMU_ONLY_COUNT_RUN) {
296 /*
297 * We're only counting in RUN state,
298 * so PM_CYC is equivalent to PM_RUN_CYC
299 * and PM_INST_CMPL === PM_RUN_INST_CMPL.
300 * This doesn't include alternatives that don't provide
301 * any extra flexibility in assigning PMCs (e.g.
302 * 0x100005 for PM_RUN_CYC vs. 0xf for PM_CYC).
303 * Note that even with these additional alternatives
304 * we never end up with more than 3 alternatives for any event.
305 */
306 j = nalt;
307 for (i = 0; i < nalt; ++i) {
308 switch (alt[i]) {
309 case 0xf: /* PM_CYC */
310 alt[j++] = 0x600005; /* PM_RUN_CYC */
311 ++nlim;
312 break;
313 case 0x600005: /* PM_RUN_CYC */
314 alt[j++] = 0xf;
315 break;
316 case 0x100009: /* PM_INST_CMPL */
317 alt[j++] = 0x500009; /* PM_RUN_INST_CMPL */
318 ++nlim;
319 break;
320 case 0x500009: /* PM_RUN_INST_CMPL */
321 alt[j++] = 0x100009; /* PM_INST_CMPL */
322 alt[j++] = 0x200009;
323 break;
324 }
325 }
326 nalt = j;
327 }
328
329 if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) {
330 /* remove the limited PMC events */
331 j = 0;
332 for (i = 0; i < nalt; ++i) {
333 if (!power5p_limited_pmc_event(alt[i])) {
334 alt[j] = alt[i];
335 ++j;
336 }
337 }
338 nalt = j;
339 } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) {
340 /* remove all but the limited PMC events */
341 j = 0;
342 for (i = 0; i < nalt; ++i) {
343 if (power5p_limited_pmc_event(alt[i])) {
344 alt[j] = alt[i];
345 ++j;
346 }
347 }
348 nalt = j;
349 }
350
351 return nalt;
352 }
353
354 /*
355 * Map of which direct events on which PMCs are marked instruction events.
356 * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
357 * Bit 0 is set if it is marked for all PMCs.
358 * The 0x80 bit indicates a byte decode PMCSEL value.
359 */
360 static unsigned char direct_event_is_marked[0x28] = {
361 0, /* 00 */
362 0x1f, /* 01 PM_IOPS_CMPL */
363 0x2, /* 02 PM_MRK_GRP_DISP */
364 0xe, /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
365 0, /* 04 */
366 0x1c, /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
367 0x80, /* 06 */
368 0x80, /* 07 */
369 0, 0, 0,/* 08 - 0a */
370 0x18, /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
371 0, /* 0c */
372 0x80, /* 0d */
373 0x80, /* 0e */
374 0, /* 0f */
375 0, /* 10 */
376 0x14, /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
377 0, /* 12 */
378 0x10, /* 13 PM_MRK_GRP_CMPL */
379 0x1f, /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
380 0x2, /* 15 PM_MRK_GRP_ISSUED */
381 0x80, /* 16 */
382 0x80, /* 17 */
383 0, 0, 0, 0, 0,
384 0x80, /* 1d */
385 0x80, /* 1e */
386 0, /* 1f */
387 0x80, /* 20 */
388 0x80, /* 21 */
389 0x80, /* 22 */
390 0x80, /* 23 */
391 0x80, /* 24 */
392 0x80, /* 25 */
393 0x80, /* 26 */
394 0x80, /* 27 */
395 };
396
397 /*
398 * Returns 1 if event counts things relating to marked instructions
399 * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
400 */
power5p_marked_instr_event(u64 event)401 static int power5p_marked_instr_event(u64 event)
402 {
403 int pmc, psel;
404 int bit, byte, unit;
405 u32 mask;
406
407 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
408 psel = event & PM_PMCSEL_MSK;
409 if (pmc >= 5)
410 return 0;
411
412 bit = -1;
413 if (psel < sizeof(direct_event_is_marked)) {
414 if (direct_event_is_marked[psel] & (1 << pmc))
415 return 1;
416 if (direct_event_is_marked[psel] & 0x80)
417 bit = 4;
418 else if (psel == 0x08)
419 bit = pmc - 1;
420 else if (psel == 0x10)
421 bit = 4 - pmc;
422 else if (psel == 0x1b && (pmc == 1 || pmc == 3))
423 bit = 4;
424 } else if ((psel & 0x48) == 0x40) {
425 bit = psel & 7;
426 } else if (psel == 0x28) {
427 bit = pmc - 1;
428 } else if (pmc == 3 && (psel == 0x2e || psel == 0x2f)) {
429 bit = 4;
430 }
431
432 if (!(event & PM_BUSEVENT_MSK) || bit == -1)
433 return 0;
434
435 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
436 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
437 if (unit == PM_LSU0) {
438 /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
439 mask = 0x5dff00;
440 } else if (unit == PM_LSU1 && byte >= 4) {
441 byte -= 4;
442 /* byte 5 bits 6-7, byte 6 bits 0,4, byte 7 bits 0-4,6 */
443 mask = 0x5f11c000;
444 } else
445 return 0;
446
447 return (mask >> (byte * 8 + bit)) & 1;
448 }
449
power5p_compute_mmcr(u64 event[],int n_ev,unsigned int hwc[],unsigned long mmcr[],struct perf_event * pevents[])450 static int power5p_compute_mmcr(u64 event[], int n_ev,
451 unsigned int hwc[], unsigned long mmcr[], struct perf_event *pevents[])
452 {
453 unsigned long mmcr1 = 0;
454 unsigned long mmcra = 0;
455 unsigned int pmc, unit, byte, psel;
456 unsigned int ttm;
457 int i, isbus, bit, grsel;
458 unsigned int pmc_inuse = 0;
459 unsigned char busbyte[4];
460 unsigned char unituse[16];
461 int ttmuse;
462
463 if (n_ev > 6)
464 return -1;
465
466 /* First pass to count resource use */
467 memset(busbyte, 0, sizeof(busbyte));
468 memset(unituse, 0, sizeof(unituse));
469 for (i = 0; i < n_ev; ++i) {
470 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
471 if (pmc) {
472 if (pmc > 6)
473 return -1;
474 if (pmc_inuse & (1 << (pmc - 1)))
475 return -1;
476 pmc_inuse |= 1 << (pmc - 1);
477 }
478 if (event[i] & PM_BUSEVENT_MSK) {
479 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
480 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
481 if (unit > PM_LASTUNIT)
482 return -1;
483 if (unit == PM_ISU0_ALT)
484 unit = PM_ISU0;
485 if (byte >= 4) {
486 if (unit != PM_LSU1)
487 return -1;
488 ++unit;
489 byte &= 3;
490 }
491 if (busbyte[byte] && busbyte[byte] != unit)
492 return -1;
493 busbyte[byte] = unit;
494 unituse[unit] = 1;
495 }
496 }
497
498 /*
499 * Assign resources and set multiplexer selects.
500 *
501 * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
502 * choice we have to deal with.
503 */
504 if (unituse[PM_ISU0] &
505 (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
506 unituse[PM_ISU0_ALT] = 1; /* move ISU to TTM1 */
507 unituse[PM_ISU0] = 0;
508 }
509 /* Set TTM[01]SEL fields. */
510 ttmuse = 0;
511 for (i = PM_FPU; i <= PM_ISU1; ++i) {
512 if (!unituse[i])
513 continue;
514 if (ttmuse++)
515 return -1;
516 mmcr1 |= (unsigned long)i << MMCR1_TTM0SEL_SH;
517 }
518 ttmuse = 0;
519 for (; i <= PM_GRS; ++i) {
520 if (!unituse[i])
521 continue;
522 if (ttmuse++)
523 return -1;
524 mmcr1 |= (unsigned long)(i & 3) << MMCR1_TTM1SEL_SH;
525 }
526 if (ttmuse > 1)
527 return -1;
528
529 /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
530 for (byte = 0; byte < 4; ++byte) {
531 unit = busbyte[byte];
532 if (!unit)
533 continue;
534 if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
535 /* get ISU0 through TTM1 rather than TTM0 */
536 unit = PM_ISU0_ALT;
537 } else if (unit == PM_LSU1 + 1) {
538 /* select lower word of LSU1 for this byte */
539 mmcr1 |= 1ul << (MMCR1_TTM3SEL_SH + 3 - byte);
540 }
541 ttm = unit >> 2;
542 mmcr1 |= (unsigned long)ttm
543 << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
544 }
545
546 /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
547 for (i = 0; i < n_ev; ++i) {
548 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
549 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
550 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
551 psel = event[i] & PM_PMCSEL_MSK;
552 isbus = event[i] & PM_BUSEVENT_MSK;
553 if (!pmc) {
554 /* Bus event or any-PMC direct event */
555 for (pmc = 0; pmc < 4; ++pmc) {
556 if (!(pmc_inuse & (1 << pmc)))
557 break;
558 }
559 if (pmc >= 4)
560 return -1;
561 pmc_inuse |= 1 << pmc;
562 } else if (pmc <= 4) {
563 /* Direct event */
564 --pmc;
565 if (isbus && (byte & 2) &&
566 (psel == 8 || psel == 0x10 || psel == 0x28))
567 /* add events on higher-numbered bus */
568 mmcr1 |= 1ul << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
569 } else {
570 /* Instructions or run cycles on PMC5/6 */
571 --pmc;
572 }
573 if (isbus && unit == PM_GRS) {
574 bit = psel & 7;
575 grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
576 mmcr1 |= (unsigned long)grsel << grsel_shift[bit];
577 }
578 if (power5p_marked_instr_event(event[i]))
579 mmcra |= MMCRA_SAMPLE_ENABLE;
580 if ((psel & 0x58) == 0x40 && (byte & 1) != ((pmc >> 1) & 1))
581 /* select alternate byte lane */
582 psel |= 0x10;
583 if (pmc <= 3)
584 mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
585 hwc[i] = pmc;
586 }
587
588 /* Return MMCRx values */
589 mmcr[0] = 0;
590 if (pmc_inuse & 1)
591 mmcr[0] = MMCR0_PMC1CE;
592 if (pmc_inuse & 0x3e)
593 mmcr[0] |= MMCR0_PMCjCE;
594 mmcr[1] = mmcr1;
595 mmcr[2] = mmcra;
596 return 0;
597 }
598
power5p_disable_pmc(unsigned int pmc,unsigned long mmcr[])599 static void power5p_disable_pmc(unsigned int pmc, unsigned long mmcr[])
600 {
601 if (pmc <= 3)
602 mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
603 }
604
605 static int power5p_generic_events[] = {
606 [PERF_COUNT_HW_CPU_CYCLES] = 0xf,
607 [PERF_COUNT_HW_INSTRUCTIONS] = 0x100009,
608 [PERF_COUNT_HW_CACHE_REFERENCES] = 0x1c10a8, /* LD_REF_L1 */
609 [PERF_COUNT_HW_CACHE_MISSES] = 0x3c1088, /* LD_MISS_L1 */
610 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x230e4, /* BR_ISSUED */
611 [PERF_COUNT_HW_BRANCH_MISSES] = 0x230e5, /* BR_MPRED_CR */
612 };
613
614 #define C(x) PERF_COUNT_HW_CACHE_##x
615
616 /*
617 * Table of generalized cache-related events.
618 * 0 means not supported, -1 means nonsensical, other values
619 * are event codes.
620 */
621 static int power5p_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
622 [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
623 [C(OP_READ)] = { 0x1c10a8, 0x3c1088 },
624 [C(OP_WRITE)] = { 0x2c10a8, 0xc10c3 },
625 [C(OP_PREFETCH)] = { 0xc70e7, -1 },
626 },
627 [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
628 [C(OP_READ)] = { 0, 0 },
629 [C(OP_WRITE)] = { -1, -1 },
630 [C(OP_PREFETCH)] = { 0, 0 },
631 },
632 [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
633 [C(OP_READ)] = { 0, 0 },
634 [C(OP_WRITE)] = { 0, 0 },
635 [C(OP_PREFETCH)] = { 0xc50c3, 0 },
636 },
637 [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
638 [C(OP_READ)] = { 0xc20e4, 0x800c4 },
639 [C(OP_WRITE)] = { -1, -1 },
640 [C(OP_PREFETCH)] = { -1, -1 },
641 },
642 [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
643 [C(OP_READ)] = { 0, 0x800c0 },
644 [C(OP_WRITE)] = { -1, -1 },
645 [C(OP_PREFETCH)] = { -1, -1 },
646 },
647 [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
648 [C(OP_READ)] = { 0x230e4, 0x230e5 },
649 [C(OP_WRITE)] = { -1, -1 },
650 [C(OP_PREFETCH)] = { -1, -1 },
651 },
652 [C(NODE)] = { /* RESULT_ACCESS RESULT_MISS */
653 [C(OP_READ)] = { -1, -1 },
654 [C(OP_WRITE)] = { -1, -1 },
655 [C(OP_PREFETCH)] = { -1, -1 },
656 },
657 };
658
659 static struct power_pmu power5p_pmu = {
660 .name = "POWER5+/++",
661 .n_counter = 6,
662 .max_alternatives = MAX_ALT,
663 .add_fields = 0x7000000000055ul,
664 .test_adder = 0x3000040000000ul,
665 .compute_mmcr = power5p_compute_mmcr,
666 .get_constraint = power5p_get_constraint,
667 .get_alternatives = power5p_get_alternatives,
668 .disable_pmc = power5p_disable_pmc,
669 .limited_pmc_event = power5p_limited_pmc_event,
670 .flags = PPMU_LIMITED_PMC5_6 | PPMU_HAS_SSLOT,
671 .n_generic = ARRAY_SIZE(power5p_generic_events),
672 .generic_events = power5p_generic_events,
673 .cache_events = &power5p_cache_events,
674 };
675
init_power5p_pmu(void)676 int init_power5p_pmu(void)
677 {
678 if (!cur_cpu_spec->oprofile_cpu_type ||
679 (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5+")
680 && strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5++")))
681 return -ENODEV;
682
683 return register_power_pmu(&power5p_pmu);
684 }
685
