1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Performance counter support for POWER9 processors.
4 *
5 * Copyright 2009 Paul Mackerras, IBM Corporation.
6 * Copyright 2013 Michael Ellerman, IBM Corporation.
7 * Copyright 2016 Madhavan Srinivasan, IBM Corporation.
8 */
9
10#define pr_fmt(fmt) "power9-pmu: " fmt
11
12#include "isa207-common.h"
13
14/*
15 * Raw event encoding for Power9:
16 *
17 * 60 56 52 48 44 40 36 32
18 * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
19 * | | [ ] [ ] [ thresh_cmp ] [ thresh_ctl ]
20 * | | | | |
21 * | | *- IFM (Linux) | thresh start/stop -*
22 * | *- BHRB (Linux) *sm
23 * *- EBB (Linux)
24 *
25 * 28 24 20 16 12 8 4 0
26 * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
27 * [ ] [ sample ] [cache] [ pmc ] [unit ] [] m [ pmcxsel ]
28 * | | | | |
29 * | | | | *- mark
30 * | | *- L1/L2/L3 cache_sel |
31 * | | |
32 * | *- sampling mode for marked events *- combine
33 * |
34 * *- thresh_sel
35 *
36 * Below uses IBM bit numbering.
37 *
38 * MMCR1[x:y] = unit (PMCxUNIT)
39 * MMCR1[24] = pmc1combine[0]
40 * MMCR1[25] = pmc1combine[1]
41 * MMCR1[26] = pmc2combine[0]
42 * MMCR1[27] = pmc2combine[1]
43 * MMCR1[28] = pmc3combine[0]
44 * MMCR1[29] = pmc3combine[1]
45 * MMCR1[30] = pmc4combine[0]
46 * MMCR1[31] = pmc4combine[1]
47 *
48 * if pmc == 3 and unit == 0 and pmcxsel[0:6] == 0b0101011
49 * MMCR1[20:27] = thresh_ctl
50 * else if pmc == 4 and unit == 0xf and pmcxsel[0:6] == 0b0101001
51 * MMCR1[20:27] = thresh_ctl
52 * else
53 * MMCRA[48:55] = thresh_ctl (THRESH START/END)
54 *
55 * if thresh_sel:
56 * MMCRA[45:47] = thresh_sel
57 *
58 * if thresh_cmp:
59 * MMCRA[9:11] = thresh_cmp[0:2]
60 * MMCRA[12:18] = thresh_cmp[3:9]
61 *
62 * MMCR1[16] = cache_sel[2]
63 * MMCR1[17] = cache_sel[3]
64 *
65 * if mark:
66 * MMCRA[63] = 1 (SAMPLE_ENABLE)
67 * MMCRA[57:59] = sample[0:2] (RAND_SAMP_ELIG)
68 * MMCRA[61:62] = sample[3:4] (RAND_SAMP_MODE)
69 *
70 * if EBB and BHRB:
71 * MMCRA[32:33] = IFM
72 *
73 * MMCRA[SDAR_MODE] = sm
74 */
75
76/*
77 * Some power9 event codes.
78 */
79#define EVENT(_name, _code) _name = _code,
80
81enum {
82#include "power9-events-list.h"
83};
84
85#undef EVENT
86
87/* MMCRA IFM bits - POWER9 */
88#define POWER9_MMCRA_IFM1 0x0000000040000000UL
89#define POWER9_MMCRA_IFM2 0x0000000080000000UL
90#define POWER9_MMCRA_IFM3 0x00000000C0000000UL
91#define POWER9_MMCRA_BHRB_MASK 0x00000000C0000000UL
92
93extern u64 PERF_REG_EXTENDED_MASK;
94
95/* Nasty Power9 specific hack */
96#define PVR_POWER9_CUMULUS 0x00002000
97
98/* PowerISA v2.07 format attribute structure*/
99extern const struct attribute_group isa207_pmu_format_group;
100
101static int p9_dd21_bl_ev[] = {
102 PM_MRK_ST_DONE_L2,
103 PM_RADIX_PWC_L1_HIT,
104 PM_FLOP_CMPL,
105 PM_MRK_NTF_FIN,
106 PM_RADIX_PWC_L2_HIT,
107 PM_IFETCH_THROTTLE,
108 PM_MRK_L2_TM_ST_ABORT_SISTER,
109 PM_RADIX_PWC_L3_HIT,
110 PM_RUN_CYC_SMT2_MODE,
111 PM_TM_TX_PASS_RUN_INST,
112 PM_DISP_HELD_SYNC_HOLD,
113};
114
115static int p9_dd22_bl_ev[] = {
116 PM_DTLB_MISS_16G,
117 PM_DERAT_MISS_2M,
118 PM_DTLB_MISS_2M,
119 PM_MRK_DTLB_MISS_1G,
120 PM_DTLB_MISS_4K,
121 PM_DERAT_MISS_1G,
122 PM_MRK_DERAT_MISS_2M,
123 PM_MRK_DTLB_MISS_4K,
124 PM_MRK_DTLB_MISS_16G,
125 PM_DTLB_MISS_64K,
126 PM_MRK_DERAT_MISS_1G,
127 PM_MRK_DTLB_MISS_64K,
128 PM_DISP_HELD_SYNC_HOLD,
129 PM_DTLB_MISS_16M,
130 PM_DTLB_MISS_1G,
131 PM_MRK_DTLB_MISS_16M,
132};
133
134/* Table of alternatives, sorted by column 0 */
135static const unsigned int power9_event_alternatives[][MAX_ALT] = {
136 { PM_BR_2PATH, PM_BR_2PATH_ALT },
137 { PM_INST_DISP, PM_INST_DISP_ALT },
138 { PM_RUN_CYC_ALT, PM_RUN_CYC },
139 { PM_LD_MISS_L1, PM_LD_MISS_L1_ALT },
140 { PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL },
141};
142
143static int power9_get_alternatives(u64 event, unsigned int flags, u64 alt[])
144{
145 int num_alt = 0;
146
147 num_alt = isa207_get_alternatives(event, alt,
148 ARRAY_SIZE(power9_event_alternatives), flags,
149 ev_alt: power9_event_alternatives);
150
151 return num_alt;
152}
153
154static int power9_check_attr_config(struct perf_event *ev)
155{
156 u64 val;
157 u64 event = ev->attr.config;
158
159 val = (event >> EVENT_SAMPLE_SHIFT) & EVENT_SAMPLE_MASK;
160 if (val == 0xC || isa3XX_check_attr_config(ev))
161 return -EINVAL;
162
163 return 0;
164}
165
166GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC);
167GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_ICT_NOSLOT_CYC);
168GENERIC_EVENT_ATTR(stalled-cycles-backend, PM_CMPLU_STALL);
169GENERIC_EVENT_ATTR(instructions, PM_INST_CMPL);
170GENERIC_EVENT_ATTR(branch-instructions, PM_BR_CMPL);
171GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED_CMPL);
172GENERIC_EVENT_ATTR(cache-references, PM_LD_REF_L1);
173GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1_FIN);
174GENERIC_EVENT_ATTR(mem-loads, MEM_LOADS);
175GENERIC_EVENT_ATTR(mem-stores, MEM_STORES);
176
177CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1_FIN);
178CACHE_EVENT_ATTR(L1-dcache-loads, PM_LD_REF_L1);
179CACHE_EVENT_ATTR(L1-dcache-prefetches, PM_L1_PREF);
180CACHE_EVENT_ATTR(L1-dcache-store-misses, PM_ST_MISS_L1);
181CACHE_EVENT_ATTR(L1-icache-load-misses, PM_L1_ICACHE_MISS);
182CACHE_EVENT_ATTR(L1-icache-loads, PM_INST_FROM_L1);
183CACHE_EVENT_ATTR(L1-icache-prefetches, PM_IC_PREF_WRITE);
184CACHE_EVENT_ATTR(LLC-load-misses, PM_DATA_FROM_L3MISS);
185CACHE_EVENT_ATTR(LLC-loads, PM_DATA_FROM_L3);
186CACHE_EVENT_ATTR(LLC-prefetches, PM_L3_PREF_ALL);
187CACHE_EVENT_ATTR(branch-load-misses, PM_BR_MPRED_CMPL);
188CACHE_EVENT_ATTR(branch-loads, PM_BR_CMPL);
189CACHE_EVENT_ATTR(dTLB-load-misses, PM_DTLB_MISS);
190CACHE_EVENT_ATTR(iTLB-load-misses, PM_ITLB_MISS);
191
192static struct attribute *power9_events_attr[] = {
193 GENERIC_EVENT_PTR(PM_CYC),
194 GENERIC_EVENT_PTR(PM_ICT_NOSLOT_CYC),
195 GENERIC_EVENT_PTR(PM_CMPLU_STALL),
196 GENERIC_EVENT_PTR(PM_INST_CMPL),
197 GENERIC_EVENT_PTR(PM_BR_CMPL),
198 GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL),
199 GENERIC_EVENT_PTR(PM_LD_REF_L1),
200 GENERIC_EVENT_PTR(PM_LD_MISS_L1_FIN),
201 GENERIC_EVENT_PTR(MEM_LOADS),
202 GENERIC_EVENT_PTR(MEM_STORES),
203 CACHE_EVENT_PTR(PM_LD_MISS_L1_FIN),
204 CACHE_EVENT_PTR(PM_LD_REF_L1),
205 CACHE_EVENT_PTR(PM_L1_PREF),
206 CACHE_EVENT_PTR(PM_ST_MISS_L1),
207 CACHE_EVENT_PTR(PM_L1_ICACHE_MISS),
208 CACHE_EVENT_PTR(PM_INST_FROM_L1),
209 CACHE_EVENT_PTR(PM_IC_PREF_WRITE),
210 CACHE_EVENT_PTR(PM_DATA_FROM_L3MISS),
211 CACHE_EVENT_PTR(PM_DATA_FROM_L3),
212 CACHE_EVENT_PTR(PM_L3_PREF_ALL),
213 CACHE_EVENT_PTR(PM_BR_MPRED_CMPL),
214 CACHE_EVENT_PTR(PM_BR_CMPL),
215 CACHE_EVENT_PTR(PM_DTLB_MISS),
216 CACHE_EVENT_PTR(PM_ITLB_MISS),
217 NULL
218};
219
220static const struct attribute_group power9_pmu_events_group = {
221 .name = "events",
222 .attrs = power9_events_attr,
223};
224
225PMU_FORMAT_ATTR(event, "config:0-51");
226PMU_FORMAT_ATTR(pmcxsel, "config:0-7");
227PMU_FORMAT_ATTR(mark, "config:8");
228PMU_FORMAT_ATTR(combine, "config:10-11");
229PMU_FORMAT_ATTR(unit, "config:12-15");
230PMU_FORMAT_ATTR(pmc, "config:16-19");
231PMU_FORMAT_ATTR(cache_sel, "config:20-23");
232PMU_FORMAT_ATTR(sample_mode, "config:24-28");
233PMU_FORMAT_ATTR(thresh_sel, "config:29-31");
234PMU_FORMAT_ATTR(thresh_stop, "config:32-35");
235PMU_FORMAT_ATTR(thresh_start, "config:36-39");
236PMU_FORMAT_ATTR(thresh_cmp, "config:40-49");
237PMU_FORMAT_ATTR(sdar_mode, "config:50-51");
238
239static struct attribute *power9_pmu_format_attr[] = {
240 &format_attr_event.attr,
241 &format_attr_pmcxsel.attr,
242 &format_attr_mark.attr,
243 &format_attr_combine.attr,
244 &format_attr_unit.attr,
245 &format_attr_pmc.attr,
246 &format_attr_cache_sel.attr,
247 &format_attr_sample_mode.attr,
248 &format_attr_thresh_sel.attr,
249 &format_attr_thresh_stop.attr,
250 &format_attr_thresh_start.attr,
251 &format_attr_thresh_cmp.attr,
252 &format_attr_sdar_mode.attr,
253 NULL,
254};
255
256static const struct attribute_group power9_pmu_format_group = {
257 .name = "format",
258 .attrs = power9_pmu_format_attr,
259};
260
261static struct attribute *power9_pmu_caps_attrs[] = {
262 NULL
263};
264
265static struct attribute_group power9_pmu_caps_group = {
266 .name = "caps",
267 .attrs = power9_pmu_caps_attrs,
268};
269
270static const struct attribute_group *power9_pmu_attr_groups[] = {
271 &power9_pmu_format_group,
272 &power9_pmu_events_group,
273 &power9_pmu_caps_group,
274 NULL,
275};
276
277static int power9_generic_events[] = {
278 [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC,
279 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_ICT_NOSLOT_CYC,
280 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL,
281 [PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL,
282 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BR_CMPL,
283 [PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED_CMPL,
284 [PERF_COUNT_HW_CACHE_REFERENCES] = PM_LD_REF_L1,
285 [PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1_FIN,
286};
287
288static u64 power9_bhrb_filter_map(u64 branch_sample_type)
289{
290 u64 pmu_bhrb_filter = 0;
291
292 /* BHRB and regular PMU events share the same privilege state
293 * filter configuration. BHRB is always recorded along with a
294 * regular PMU event. As the privilege state filter is handled
295 * in the basic PMC configuration of the accompanying regular
296 * PMU event, we ignore any separate BHRB specific request.
297 */
298
299 /* No branch filter requested */
300 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY)
301 return pmu_bhrb_filter;
302
303 /* Invalid branch filter options - HW does not support */
304 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_RETURN)
305 return -1;
306
307 if (branch_sample_type & PERF_SAMPLE_BRANCH_IND_CALL)
308 return -1;
309
310 if (branch_sample_type & PERF_SAMPLE_BRANCH_CALL)
311 return -1;
312
313 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_CALL) {
314 pmu_bhrb_filter |= POWER9_MMCRA_IFM1;
315 return pmu_bhrb_filter;
316 }
317
318 /* Every thing else is unsupported */
319 return -1;
320}
321
322static void power9_config_bhrb(u64 pmu_bhrb_filter)
323{
324 pmu_bhrb_filter &= POWER9_MMCRA_BHRB_MASK;
325
326 /* Enable BHRB filter in PMU */
327 mtspr(SPRN_MMCRA, (mfspr(SPRN_MMCRA) | pmu_bhrb_filter));
328}
329
330#define C(x) PERF_COUNT_HW_CACHE_##x
331
332/*
333 * Table of generalized cache-related events.
334 * 0 means not supported, -1 means nonsensical, other values
335 * are event codes.
336 */
337static u64 power9_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
338 [ C(L1D) ] = {
339 [ C(OP_READ) ] = {
340 [ C(RESULT_ACCESS) ] = PM_LD_REF_L1,
341 [ C(RESULT_MISS) ] = PM_LD_MISS_L1_FIN,
342 },
343 [ C(OP_WRITE) ] = {
344 [ C(RESULT_ACCESS) ] = 0,
345 [ C(RESULT_MISS) ] = PM_ST_MISS_L1,
346 },
347 [ C(OP_PREFETCH) ] = {
348 [ C(RESULT_ACCESS) ] = PM_L1_PREF,
349 [ C(RESULT_MISS) ] = 0,
350 },
351 },
352 [ C(L1I) ] = {
353 [ C(OP_READ) ] = {
354 [ C(RESULT_ACCESS) ] = PM_INST_FROM_L1,
355 [ C(RESULT_MISS) ] = PM_L1_ICACHE_MISS,
356 },
357 [ C(OP_WRITE) ] = {
358 [ C(RESULT_ACCESS) ] = PM_L1_DEMAND_WRITE,
359 [ C(RESULT_MISS) ] = -1,
360 },
361 [ C(OP_PREFETCH) ] = {
362 [ C(RESULT_ACCESS) ] = PM_IC_PREF_WRITE,
363 [ C(RESULT_MISS) ] = 0,
364 },
365 },
366 [ C(LL) ] = {
367 [ C(OP_READ) ] = {
368 [ C(RESULT_ACCESS) ] = PM_DATA_FROM_L3,
369 [ C(RESULT_MISS) ] = PM_DATA_FROM_L3MISS,
370 },
371 [ C(OP_WRITE) ] = {
372 [ C(RESULT_ACCESS) ] = 0,
373 [ C(RESULT_MISS) ] = 0,
374 },
375 [ C(OP_PREFETCH) ] = {
376 [ C(RESULT_ACCESS) ] = PM_L3_PREF_ALL,
377 [ C(RESULT_MISS) ] = 0,
378 },
379 },
380 [ C(DTLB) ] = {
381 [ C(OP_READ) ] = {
382 [ C(RESULT_ACCESS) ] = 0,
383 [ C(RESULT_MISS) ] = PM_DTLB_MISS,
384 },
385 [ C(OP_WRITE) ] = {
386 [ C(RESULT_ACCESS) ] = -1,
387 [ C(RESULT_MISS) ] = -1,
388 },
389 [ C(OP_PREFETCH) ] = {
390 [ C(RESULT_ACCESS) ] = -1,
391 [ C(RESULT_MISS) ] = -1,
392 },
393 },
394 [ C(ITLB) ] = {
395 [ C(OP_READ) ] = {
396 [ C(RESULT_ACCESS) ] = 0,
397 [ C(RESULT_MISS) ] = PM_ITLB_MISS,
398 },
399 [ C(OP_WRITE) ] = {
400 [ C(RESULT_ACCESS) ] = -1,
401 [ C(RESULT_MISS) ] = -1,
402 },
403 [ C(OP_PREFETCH) ] = {
404 [ C(RESULT_ACCESS) ] = -1,
405 [ C(RESULT_MISS) ] = -1,
406 },
407 },
408 [ C(BPU) ] = {
409 [ C(OP_READ) ] = {
410 [ C(RESULT_ACCESS) ] = PM_BR_CMPL,
411 [ C(RESULT_MISS) ] = PM_BR_MPRED_CMPL,
412 },
413 [ C(OP_WRITE) ] = {
414 [ C(RESULT_ACCESS) ] = -1,
415 [ C(RESULT_MISS) ] = -1,
416 },
417 [ C(OP_PREFETCH) ] = {
418 [ C(RESULT_ACCESS) ] = -1,
419 [ C(RESULT_MISS) ] = -1,
420 },
421 },
422 [ C(NODE) ] = {
423 [ C(OP_READ) ] = {
424 [ C(RESULT_ACCESS) ] = -1,
425 [ C(RESULT_MISS) ] = -1,
426 },
427 [ C(OP_WRITE) ] = {
428 [ C(RESULT_ACCESS) ] = -1,
429 [ C(RESULT_MISS) ] = -1,
430 },
431 [ C(OP_PREFETCH) ] = {
432 [ C(RESULT_ACCESS) ] = -1,
433 [ C(RESULT_MISS) ] = -1,
434 },
435 },
436};
437
438#undef C
439
440static struct power_pmu power9_pmu = {
441 .name = "POWER9",
442 .n_counter = MAX_PMU_COUNTERS,
443 .add_fields = ISA207_ADD_FIELDS,
444 .test_adder = ISA207_TEST_ADDER,
445 .group_constraint_mask = CNST_CACHE_PMC4_MASK,
446 .group_constraint_val = CNST_CACHE_PMC4_VAL,
447 .compute_mmcr = isa207_compute_mmcr,
448 .config_bhrb = power9_config_bhrb,
449 .bhrb_filter_map = power9_bhrb_filter_map,
450 .get_constraint = isa207_get_constraint,
451 .get_alternatives = power9_get_alternatives,
452 .get_mem_data_src = isa207_get_mem_data_src,
453 .get_mem_weight = isa207_get_mem_weight,
454 .disable_pmc = isa207_disable_pmc,
455 .flags = PPMU_HAS_SIER | PPMU_ARCH_207S,
456 .n_generic = ARRAY_SIZE(power9_generic_events),
457 .generic_events = power9_generic_events,
458 .cache_events = &power9_cache_events,
459 .attr_groups = power9_pmu_attr_groups,
460 .bhrb_nr = 32,
461 .capabilities = PERF_PMU_CAP_EXTENDED_REGS,
462 .check_attr_config = power9_check_attr_config,
463};
464
465int __init init_power9_pmu(void)
466{
467 int rc = 0;
468 unsigned int pvr = mfspr(SPRN_PVR);
469
470 if (PVR_VER(pvr) != PVR_POWER9)
471 return -ENODEV;
472
473 /* Blacklist events */
474 if (!(pvr & PVR_POWER9_CUMULUS)) {
475 if ((PVR_CFG(pvr) == 2) && (PVR_MIN(pvr) == 1)) {
476 power9_pmu.blacklist_ev = p9_dd21_bl_ev;
477 power9_pmu.n_blacklist_ev = ARRAY_SIZE(p9_dd21_bl_ev);
478 } else if ((PVR_CFG(pvr) == 2) && (PVR_MIN(pvr) == 2)) {
479 power9_pmu.blacklist_ev = p9_dd22_bl_ev;
480 power9_pmu.n_blacklist_ev = ARRAY_SIZE(p9_dd22_bl_ev);
481 }
482 }
483
484 /* Set the PERF_REG_EXTENDED_MASK here */
485 PERF_REG_EXTENDED_MASK = PERF_REG_PMU_MASK_300;
486
487 rc = register_power_pmu(&power9_pmu);
488 if (rc)
489 return rc;
490
491 /* Tell userspace that EBB is supported */
492 cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB;
493
494 return 0;
495}
496

source code of linux/arch/powerpc/perf/power9-pmu.c