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-rw-r--r--arch/powerpc/kernel/power4-pmu.c557
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diff --git a/arch/powerpc/kernel/power4-pmu.c b/arch/powerpc/kernel/power4-pmu.c
new file mode 100644
index 000000000000..1407b19ab619
--- /dev/null
+++ b/arch/powerpc/kernel/power4-pmu.c
@@ -0,0 +1,557 @@
1/*
2 * Performance counter support for POWER4 (GP) and POWER4+ (GQ) 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 <asm/reg.h>
14
15/*
16 * Bits in event code for POWER4
17 */
18#define PM_PMC_SH 12 /* PMC number (1-based) for direct events */
19#define PM_PMC_MSK 0xf
20#define PM_UNIT_SH 8 /* TTMMUX number and setting - unit select */
21#define PM_UNIT_MSK 0xf
22#define PM_LOWER_SH 6
23#define PM_LOWER_MSK 1
24#define PM_LOWER_MSKS 0x40
25#define PM_BYTE_SH 4 /* Byte number of event bus to use */
26#define PM_BYTE_MSK 3
27#define PM_PMCSEL_MSK 7
28
29/*
30 * Unit code values
31 */
32#define PM_FPU 1
33#define PM_ISU1 2
34#define PM_IFU 3
35#define PM_IDU0 4
36#define PM_ISU1_ALT 6
37#define PM_ISU2 7
38#define PM_IFU_ALT 8
39#define PM_LSU0 9
40#define PM_LSU1 0xc
41#define PM_GPS 0xf
42
43/*
44 * Bits in MMCR0 for POWER4
45 */
46#define MMCR0_PMC1SEL_SH 8
47#define MMCR0_PMC2SEL_SH 1
48#define MMCR_PMCSEL_MSK 0x1f
49
50/*
51 * Bits in MMCR1 for POWER4
52 */
53#define MMCR1_TTM0SEL_SH 62
54#define MMCR1_TTC0SEL_SH 61
55#define MMCR1_TTM1SEL_SH 59
56#define MMCR1_TTC1SEL_SH 58
57#define MMCR1_TTM2SEL_SH 56
58#define MMCR1_TTC2SEL_SH 55
59#define MMCR1_TTM3SEL_SH 53
60#define MMCR1_TTC3SEL_SH 52
61#define MMCR1_TTMSEL_MSK 3
62#define MMCR1_TD_CP_DBG0SEL_SH 50
63#define MMCR1_TD_CP_DBG1SEL_SH 48
64#define MMCR1_TD_CP_DBG2SEL_SH 46
65#define MMCR1_TD_CP_DBG3SEL_SH 44
66#define MMCR1_DEBUG0SEL_SH 43
67#define MMCR1_DEBUG1SEL_SH 42
68#define MMCR1_DEBUG2SEL_SH 41
69#define MMCR1_DEBUG3SEL_SH 40
70#define MMCR1_PMC1_ADDER_SEL_SH 39
71#define MMCR1_PMC2_ADDER_SEL_SH 38
72#define MMCR1_PMC6_ADDER_SEL_SH 37
73#define MMCR1_PMC5_ADDER_SEL_SH 36
74#define MMCR1_PMC8_ADDER_SEL_SH 35
75#define MMCR1_PMC7_ADDER_SEL_SH 34
76#define MMCR1_PMC3_ADDER_SEL_SH 33
77#define MMCR1_PMC4_ADDER_SEL_SH 32
78#define MMCR1_PMC3SEL_SH 27
79#define MMCR1_PMC4SEL_SH 22
80#define MMCR1_PMC5SEL_SH 17
81#define MMCR1_PMC6SEL_SH 12
82#define MMCR1_PMC7SEL_SH 7
83#define MMCR1_PMC8SEL_SH 2 /* note bit 0 is in MMCRA for GP */
84
85static short mmcr1_adder_bits[8] = {
86 MMCR1_PMC1_ADDER_SEL_SH,
87 MMCR1_PMC2_ADDER_SEL_SH,
88 MMCR1_PMC3_ADDER_SEL_SH,
89 MMCR1_PMC4_ADDER_SEL_SH,
90 MMCR1_PMC5_ADDER_SEL_SH,
91 MMCR1_PMC6_ADDER_SEL_SH,
92 MMCR1_PMC7_ADDER_SEL_SH,
93 MMCR1_PMC8_ADDER_SEL_SH
94};
95
96/*
97 * Bits in MMCRA
98 */
99#define MMCRA_PMC8SEL0_SH 17 /* PMC8SEL bit 0 for GP */
100
101/*
102 * Layout of constraint bits:
103 * 6666555555555544444444443333333333222222222211111111110000000000
104 * 3210987654321098765432109876543210987654321098765432109876543210
105 * |[ >[ >[ >|||[ >[ >< >< >< >< ><><><><><><><><>
106 * | UC1 UC2 UC3 ||| PS1 PS2 B0 B1 B2 B3 P1P2P3P4P5P6P7P8
107 * \SMPL ||\TTC3SEL
108 * |\TTC_IFU_SEL
109 * \TTM2SEL0
110 *
111 * SMPL - SAMPLE_ENABLE constraint
112 * 56: SAMPLE_ENABLE value 0x0100_0000_0000_0000
113 *
114 * UC1 - unit constraint 1: can't have all three of FPU/ISU1/IDU0|ISU2
115 * 55: UC1 error 0x0080_0000_0000_0000
116 * 54: FPU events needed 0x0040_0000_0000_0000
117 * 53: ISU1 events needed 0x0020_0000_0000_0000
118 * 52: IDU0|ISU2 events needed 0x0010_0000_0000_0000
119 *
120 * UC2 - unit constraint 2: can't have all three of FPU/IFU/LSU0
121 * 51: UC2 error 0x0008_0000_0000_0000
122 * 50: FPU events needed 0x0004_0000_0000_0000
123 * 49: IFU events needed 0x0002_0000_0000_0000
124 * 48: LSU0 events needed 0x0001_0000_0000_0000
125 *
126 * UC3 - unit constraint 3: can't have all four of LSU0/IFU/IDU0|ISU2/ISU1
127 * 47: UC3 error 0x8000_0000_0000
128 * 46: LSU0 events needed 0x4000_0000_0000
129 * 45: IFU events needed 0x2000_0000_0000
130 * 44: IDU0|ISU2 events needed 0x1000_0000_0000
131 * 43: ISU1 events needed 0x0800_0000_0000
132 *
133 * TTM2SEL0
134 * 42: 0 = IDU0 events needed
135 * 1 = ISU2 events needed 0x0400_0000_0000
136 *
137 * TTC_IFU_SEL
138 * 41: 0 = IFU.U events needed
139 * 1 = IFU.L events needed 0x0200_0000_0000
140 *
141 * TTC3SEL
142 * 40: 0 = LSU1.U events needed
143 * 1 = LSU1.L events needed 0x0100_0000_0000
144 *
145 * PS1
146 * 39: PS1 error 0x0080_0000_0000
147 * 36-38: count of events needing PMC1/2/5/6 0x0070_0000_0000
148 *
149 * PS2
150 * 35: PS2 error 0x0008_0000_0000
151 * 32-34: count of events needing PMC3/4/7/8 0x0007_0000_0000
152 *
153 * B0
154 * 28-31: Byte 0 event source 0xf000_0000
155 * 1 = FPU
156 * 2 = ISU1
157 * 3 = IFU
158 * 4 = IDU0
159 * 7 = ISU2
160 * 9 = LSU0
161 * c = LSU1
162 * f = GPS
163 *
164 * B1, B2, B3
165 * 24-27, 20-23, 16-19: Byte 1, 2, 3 event sources
166 *
167 * P8
168 * 15: P8 error 0x8000
169 * 14-15: Count of events needing PMC8
170 *
171 * P1..P7
172 * 0-13: Count of events needing PMC1..PMC7
173 *
174 * Note: this doesn't allow events using IFU.U to be combined with events
175 * using IFU.L, though that is feasible (using TTM0 and TTM2). However
176 * there are no listed events for IFU.L (they are debug events not
177 * verified for performance monitoring) so this shouldn't cause a
178 * problem.
179 */
180
181static struct unitinfo {
182 u64 value, mask;
183 int unit;
184 int lowerbit;
185} p4_unitinfo[16] = {
186 [PM_FPU] = { 0x44000000000000ull, 0x88000000000000ull, PM_FPU, 0 },
187 [PM_ISU1] = { 0x20080000000000ull, 0x88000000000000ull, PM_ISU1, 0 },
188 [PM_ISU1_ALT] =
189 { 0x20080000000000ull, 0x88000000000000ull, PM_ISU1, 0 },
190 [PM_IFU] = { 0x02200000000000ull, 0x08820000000000ull, PM_IFU, 41 },
191 [PM_IFU_ALT] =
192 { 0x02200000000000ull, 0x08820000000000ull, PM_IFU, 41 },
193 [PM_IDU0] = { 0x10100000000000ull, 0x80840000000000ull, PM_IDU0, 1 },
194 [PM_ISU2] = { 0x10140000000000ull, 0x80840000000000ull, PM_ISU2, 0 },
195 [PM_LSU0] = { 0x01400000000000ull, 0x08800000000000ull, PM_LSU0, 0 },
196 [PM_LSU1] = { 0x00000000000000ull, 0x00010000000000ull, PM_LSU1, 40 },
197 [PM_GPS] = { 0x00000000000000ull, 0x00000000000000ull, PM_GPS, 0 }
198};
199
200static unsigned char direct_marked_event[8] = {
201 (1<<2) | (1<<3), /* PMC1: PM_MRK_GRP_DISP, PM_MRK_ST_CMPL */
202 (1<<3) | (1<<5), /* PMC2: PM_THRESH_TIMEO, PM_MRK_BRU_FIN */
203 (1<<3), /* PMC3: PM_MRK_ST_CMPL_INT */
204 (1<<4) | (1<<5), /* PMC4: PM_MRK_GRP_CMPL, PM_MRK_CRU_FIN */
205 (1<<4) | (1<<5), /* PMC5: PM_MRK_GRP_TIMEO */
206 (1<<3) | (1<<4) | (1<<5),
207 /* PMC6: PM_MRK_ST_GPS, PM_MRK_FXU_FIN, PM_MRK_GRP_ISSUED */
208 (1<<4) | (1<<5), /* PMC7: PM_MRK_FPU_FIN, PM_MRK_INST_FIN */
209 (1<<4), /* PMC8: PM_MRK_LSU_FIN */
210};
211
212/*
213 * Returns 1 if event counts things relating to marked instructions
214 * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
215 */
216static int p4_marked_instr_event(unsigned int event)
217{
218 int pmc, psel, unit, byte, bit;
219 unsigned int mask;
220
221 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
222 psel = event & PM_PMCSEL_MSK;
223 if (pmc) {
224 if (direct_marked_event[pmc - 1] & (1 << psel))
225 return 1;
226 if (psel == 0) /* add events */
227 bit = (pmc <= 4)? pmc - 1: 8 - pmc;
228 else if (psel == 6) /* decode events */
229 bit = 4;
230 else
231 return 0;
232 } else
233 bit = psel;
234
235 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
236 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
237 mask = 0;
238 switch (unit) {
239 case PM_LSU1:
240 if (event & PM_LOWER_MSKS)
241 mask = 1 << 28; /* byte 7 bit 4 */
242 else
243 mask = 6 << 24; /* byte 3 bits 1 and 2 */
244 break;
245 case PM_LSU0:
246 /* byte 3, bit 3; byte 2 bits 0,2,3,4,5; byte 1 */
247 mask = 0x083dff00;
248 }
249 return (mask >> (byte * 8 + bit)) & 1;
250}
251
252static int p4_get_constraint(unsigned int event, u64 *maskp, u64 *valp)
253{
254 int pmc, byte, unit, lower, sh;
255 u64 mask = 0, value = 0;
256 int grp = -1;
257
258 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
259 if (pmc) {
260 if (pmc > 8)
261 return -1;
262 sh = (pmc - 1) * 2;
263 mask |= 2 << sh;
264 value |= 1 << sh;
265 grp = ((pmc - 1) >> 1) & 1;
266 }
267 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
268 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
269 if (unit) {
270 lower = (event >> PM_LOWER_SH) & PM_LOWER_MSK;
271
272 /*
273 * Bus events on bytes 0 and 2 can be counted
274 * on PMC1/2/5/6; bytes 1 and 3 on PMC3/4/7/8.
275 */
276 if (!pmc)
277 grp = byte & 1;
278
279 if (!p4_unitinfo[unit].unit)
280 return -1;
281 mask |= p4_unitinfo[unit].mask;
282 value |= p4_unitinfo[unit].value;
283 sh = p4_unitinfo[unit].lowerbit;
284 if (sh > 1)
285 value |= (u64)lower << sh;
286 else if (lower != sh)
287 return -1;
288 unit = p4_unitinfo[unit].unit;
289
290 /* Set byte lane select field */
291 mask |= 0xfULL << (28 - 4 * byte);
292 value |= (u64)unit << (28 - 4 * byte);
293 }
294 if (grp == 0) {
295 /* increment PMC1/2/5/6 field */
296 mask |= 0x8000000000ull;
297 value |= 0x1000000000ull;
298 } else {
299 /* increment PMC3/4/7/8 field */
300 mask |= 0x800000000ull;
301 value |= 0x100000000ull;
302 }
303
304 /* Marked instruction events need sample_enable set */
305 if (p4_marked_instr_event(event)) {
306 mask |= 1ull << 56;
307 value |= 1ull << 56;
308 }
309
310 /* PMCSEL=6 decode events on byte 2 need sample_enable clear */
311 if (pmc && (event & PM_PMCSEL_MSK) == 6 && byte == 2)
312 mask |= 1ull << 56;
313
314 *maskp = mask;
315 *valp = value;
316 return 0;
317}
318
319static unsigned int ppc_inst_cmpl[] = {
320 0x1001, 0x4001, 0x6001, 0x7001, 0x8001
321};
322
323static int p4_get_alternatives(unsigned int event, unsigned int alt[])
324{
325 int i, j, na;
326
327 alt[0] = event;
328 na = 1;
329
330 /* 2 possibilities for PM_GRP_DISP_REJECT */
331 if (event == 0x8003 || event == 0x0224) {
332 alt[1] = event ^ (0x8003 ^ 0x0224);
333 return 2;
334 }
335
336 /* 2 possibilities for PM_ST_MISS_L1 */
337 if (event == 0x0c13 || event == 0x0c23) {
338 alt[1] = event ^ (0x0c13 ^ 0x0c23);
339 return 2;
340 }
341
342 /* several possibilities for PM_INST_CMPL */
343 for (i = 0; i < ARRAY_SIZE(ppc_inst_cmpl); ++i) {
344 if (event == ppc_inst_cmpl[i]) {
345 for (j = 0; j < ARRAY_SIZE(ppc_inst_cmpl); ++j)
346 if (j != i)
347 alt[na++] = ppc_inst_cmpl[j];
348 break;
349 }
350 }
351
352 return na;
353}
354
355static int p4_compute_mmcr(unsigned int event[], int n_ev,
356 unsigned int hwc[], u64 mmcr[])
357{
358 u64 mmcr0 = 0, mmcr1 = 0, mmcra = 0;
359 unsigned int pmc, unit, byte, psel, lower;
360 unsigned int ttm, grp;
361 unsigned int pmc_inuse = 0;
362 unsigned int pmc_grp_use[2];
363 unsigned char busbyte[4];
364 unsigned char unituse[16];
365 unsigned int unitlower = 0;
366 int i;
367
368 if (n_ev > 8)
369 return -1;
370
371 /* First pass to count resource use */
372 pmc_grp_use[0] = pmc_grp_use[1] = 0;
373 memset(busbyte, 0, sizeof(busbyte));
374 memset(unituse, 0, sizeof(unituse));
375 for (i = 0; i < n_ev; ++i) {
376 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
377 if (pmc) {
378 if (pmc_inuse & (1 << (pmc - 1)))
379 return -1;
380 pmc_inuse |= 1 << (pmc - 1);
381 /* count 1/2/5/6 vs 3/4/7/8 use */
382 ++pmc_grp_use[((pmc - 1) >> 1) & 1];
383 }
384 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
385 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
386 lower = (event[i] >> PM_LOWER_SH) & PM_LOWER_MSK;
387 if (unit) {
388 if (!pmc)
389 ++pmc_grp_use[byte & 1];
390 if (unit == 6 || unit == 8)
391 /* map alt ISU1/IFU codes: 6->2, 8->3 */
392 unit = (unit >> 1) - 1;
393 if (busbyte[byte] && busbyte[byte] != unit)
394 return -1;
395 busbyte[byte] = unit;
396 lower <<= unit;
397 if (unituse[unit] && lower != (unitlower & lower))
398 return -1;
399 unituse[unit] = 1;
400 unitlower |= lower;
401 }
402 }
403 if (pmc_grp_use[0] > 4 || pmc_grp_use[1] > 4)
404 return -1;
405
406 /*
407 * Assign resources and set multiplexer selects.
408 *
409 * Units 1,2,3 are on TTM0, 4,6,7 on TTM1, 8,10 on TTM2.
410 * Each TTMx can only select one unit, but since
411 * units 2 and 6 are both ISU1, and 3 and 8 are both IFU,
412 * we have some choices.
413 */
414 if (unituse[2] & (unituse[1] | (unituse[3] & unituse[9]))) {
415 unituse[6] = 1; /* Move 2 to 6 */
416 unituse[2] = 0;
417 }
418 if (unituse[3] & (unituse[1] | unituse[2])) {
419 unituse[8] = 1; /* Move 3 to 8 */
420 unituse[3] = 0;
421 unitlower = (unitlower & ~8) | ((unitlower & 8) << 5);
422 }
423 /* Check only one unit per TTMx */
424 if (unituse[1] + unituse[2] + unituse[3] > 1 ||
425 unituse[4] + unituse[6] + unituse[7] > 1 ||
426 unituse[8] + unituse[9] > 1 ||
427 (unituse[5] | unituse[10] | unituse[11] |
428 unituse[13] | unituse[14]))
429 return -1;
430
431 /* Set TTMxSEL fields. Note, units 1-3 => TTM0SEL codes 0-2 */
432 mmcr1 |= (u64)(unituse[3] * 2 + unituse[2]) << MMCR1_TTM0SEL_SH;
433 mmcr1 |= (u64)(unituse[7] * 3 + unituse[6] * 2) << MMCR1_TTM1SEL_SH;
434 mmcr1 |= (u64)unituse[9] << MMCR1_TTM2SEL_SH;
435
436 /* Set TTCxSEL fields. */
437 if (unitlower & 0xe)
438 mmcr1 |= 1ull << MMCR1_TTC0SEL_SH;
439 if (unitlower & 0xf0)
440 mmcr1 |= 1ull << MMCR1_TTC1SEL_SH;
441 if (unitlower & 0xf00)
442 mmcr1 |= 1ull << MMCR1_TTC2SEL_SH;
443 if (unitlower & 0x7000)
444 mmcr1 |= 1ull << MMCR1_TTC3SEL_SH;
445
446 /* Set byte lane select fields. */
447 for (byte = 0; byte < 4; ++byte) {
448 unit = busbyte[byte];
449 if (!unit)
450 continue;
451 if (unit == 0xf) {
452 /* special case for GPS */
453 mmcr1 |= 1ull << (MMCR1_DEBUG0SEL_SH - byte);
454 } else {
455 if (!unituse[unit])
456 ttm = unit - 1; /* 2->1, 3->2 */
457 else
458 ttm = unit >> 2;
459 mmcr1 |= (u64)ttm << (MMCR1_TD_CP_DBG0SEL_SH - 2*byte);
460 }
461 }
462
463 /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
464 for (i = 0; i < n_ev; ++i) {
465 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
466 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
467 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
468 psel = event[i] & PM_PMCSEL_MSK;
469 if (!pmc) {
470 /* Bus event or 00xxx direct event (off or cycles) */
471 if (unit)
472 psel |= 0x10 | ((byte & 2) << 2);
473 for (pmc = 0; pmc < 8; ++pmc) {
474 if (pmc_inuse & (1 << pmc))
475 continue;
476 grp = (pmc >> 1) & 1;
477 if (unit) {
478 if (grp == (byte & 1))
479 break;
480 } else if (pmc_grp_use[grp] < 4) {
481 ++pmc_grp_use[grp];
482 break;
483 }
484 }
485 pmc_inuse |= 1 << pmc;
486 } else {
487 /* Direct event */
488 --pmc;
489 if (psel == 0 && (byte & 2))
490 /* add events on higher-numbered bus */
491 mmcr1 |= 1ull << mmcr1_adder_bits[pmc];
492 else if (psel == 6 && byte == 3)
493 /* seem to need to set sample_enable here */
494 mmcra |= MMCRA_SAMPLE_ENABLE;
495 psel |= 8;
496 }
497 if (pmc <= 1)
498 mmcr0 |= psel << (MMCR0_PMC1SEL_SH - 7 * pmc);
499 else
500 mmcr1 |= psel << (MMCR1_PMC3SEL_SH - 5 * (pmc - 2));
501 if (pmc == 7) /* PMC8 */
502 mmcra |= (psel & 1) << MMCRA_PMC8SEL0_SH;
503 hwc[i] = pmc;
504 if (p4_marked_instr_event(event[i]))
505 mmcra |= MMCRA_SAMPLE_ENABLE;
506 }
507
508 if (pmc_inuse & 1)
509 mmcr0 |= MMCR0_PMC1CE;
510 if (pmc_inuse & 0xfe)
511 mmcr0 |= MMCR0_PMCjCE;
512
513 mmcra |= 0x2000; /* mark only one IOP per PPC instruction */
514
515 /* Return MMCRx values */
516 mmcr[0] = mmcr0;
517 mmcr[1] = mmcr1;
518 mmcr[2] = mmcra;
519 return 0;
520}
521
522static void p4_disable_pmc(unsigned int pmc, u64 mmcr[])
523{
524 /*
525 * Setting the PMCxSEL field to 0 disables PMC x.
526 * (Note that pmc is 0-based here, not 1-based.)
527 */
528 if (pmc <= 1) {
529 mmcr[0] &= ~(0x1fUL << (MMCR0_PMC1SEL_SH - 7 * pmc));
530 } else {
531 mmcr[1] &= ~(0x1fUL << (MMCR1_PMC3SEL_SH - 5 * (pmc - 2)));
532 if (pmc == 7)
533 mmcr[2] &= ~(1UL << MMCRA_PMC8SEL0_SH);
534 }
535}
536
537static int p4_generic_events[] = {
538 [PERF_COUNT_CPU_CYCLES] = 7,
539 [PERF_COUNT_INSTRUCTIONS] = 0x1001,
540 [PERF_COUNT_CACHE_REFERENCES] = 0x8c10, /* PM_LD_REF_L1 */
541 [PERF_COUNT_CACHE_MISSES] = 0x3c10, /* PM_LD_MISS_L1 */
542 [PERF_COUNT_BRANCH_INSTRUCTIONS] = 0x330, /* PM_BR_ISSUED */
543 [PERF_COUNT_BRANCH_MISSES] = 0x331, /* PM_BR_MPRED_CR */
544};
545
546struct power_pmu power4_pmu = {
547 .n_counter = 8,
548 .max_alternatives = 5,
549 .add_fields = 0x0000001100005555ull,
550 .test_adder = 0x0011083300000000ull,
551 .compute_mmcr = p4_compute_mmcr,
552 .get_constraint = p4_get_constraint,
553 .get_alternatives = p4_get_alternatives,
554 .disable_pmc = p4_disable_pmc,
555 .n_generic = ARRAY_SIZE(p4_generic_events),
556 .generic_events = p4_generic_events,
557};
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