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11#include <linux/kernel.h>
12#include <linux/perf_event.h>
13#include <linux/string.h>
14#include <asm/reg.h>
15#include <asm/cputable.h>
16
17
18
19
20#define PM_PMC_SH 16
21#define PM_PMC_MSK 0xf
22#define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH)
23#define PM_UNIT_SH 12
24#define PM_UNIT_MSK 0xf
25#define PM_COMBINE_SH 11
26#define PM_COMBINE_MSK 1
27#define PM_COMBINE_MSKS 0x800
28#define PM_L2SEL_SH 8
29#define PM_L2SEL_MSK 7
30#define PM_PMCSEL_MSK 0xff
31
32
33
34
35#define MMCR1_TTM0SEL_SH 60
36#define MMCR1_TTM1SEL_SH 56
37#define MMCR1_TTM2SEL_SH 52
38#define MMCR1_TTM3SEL_SH 48
39#define MMCR1_TTMSEL_MSK 0xf
40#define MMCR1_L2SEL_SH 45
41#define MMCR1_L2SEL_MSK 7
42#define MMCR1_PMC1_COMBINE_SH 35
43#define MMCR1_PMC2_COMBINE_SH 34
44#define MMCR1_PMC3_COMBINE_SH 33
45#define MMCR1_PMC4_COMBINE_SH 32
46#define MMCR1_PMC1SEL_SH 24
47#define MMCR1_PMC2SEL_SH 16
48#define MMCR1_PMC3SEL_SH 8
49#define MMCR1_PMC4SEL_SH 0
50#define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8)
51#define MMCR1_PMCSEL_MSK 0xff
52
53
54
55
56#define EVENT(_name, _code) \
57 _name = _code,
58
59enum {
60#include "power7-events-list.h"
61};
62#undef EVENT
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85static int power7_get_constraint(u64 event, unsigned long *maskp,
86 unsigned long *valp)
87{
88 int pmc, sh, unit;
89 unsigned long mask = 0, value = 0;
90
91 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
92 if (pmc) {
93 if (pmc > 6)
94 return -1;
95 sh = (pmc - 1) * 2;
96 mask |= 2 << sh;
97 value |= 1 << sh;
98 if (pmc >= 5 && !(event == 0x500fa || event == 0x600f4))
99 return -1;
100 }
101 if (pmc < 5) {
102
103 mask |= 0x8000;
104 value |= 0x1000;
105 }
106
107 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
108 if (unit == 6) {
109
110 int l2sel = (event >> PM_L2SEL_SH) & PM_L2SEL_MSK;
111 mask |= 0x7 << 16;
112 value |= l2sel << 16;
113 }
114
115 *maskp = mask;
116 *valp = value;
117 return 0;
118}
119
120#define MAX_ALT 2
121
122static const unsigned int event_alternatives[][MAX_ALT] = {
123 { 0x200f2, 0x300f2 },
124 { 0x200f4, 0x600f4 },
125 { 0x400fa, 0x500fa },
126};
127
128
129
130
131
132static int find_alternative(u64 event)
133{
134 int i, j;
135
136 for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
137 if (event < event_alternatives[i][0])
138 break;
139 for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
140 if (event == event_alternatives[i][j])
141 return i;
142 }
143 return -1;
144}
145
146static s64 find_alternative_decode(u64 event)
147{
148 int pmc, psel;
149
150
151 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
152 psel = event & PM_PMCSEL_MSK;
153 if ((pmc == 2 || pmc == 4) && (psel & ~7) == 0x40)
154 return event - (1 << PM_PMC_SH) + 8;
155 if ((pmc == 1 || pmc == 3) && (psel & ~7) == 0x48)
156 return event + (1 << PM_PMC_SH) - 8;
157 return -1;
158}
159
160static int power7_get_alternatives(u64 event, unsigned int flags, u64 alt[])
161{
162 int i, j, nalt = 1;
163 s64 ae;
164
165 alt[0] = event;
166 nalt = 1;
167 i = find_alternative(event);
168 if (i >= 0) {
169 for (j = 0; j < MAX_ALT; ++j) {
170 ae = event_alternatives[i][j];
171 if (ae && ae != event)
172 alt[nalt++] = ae;
173 }
174 } else {
175 ae = find_alternative_decode(event);
176 if (ae > 0)
177 alt[nalt++] = ae;
178 }
179
180 if (flags & PPMU_ONLY_COUNT_RUN) {
181
182
183
184
185
186
187
188 j = nalt;
189 for (i = 0; i < nalt; ++i) {
190 switch (alt[i]) {
191 case 0x1e:
192 alt[j++] = 0x600f4;
193 break;
194 case 0x600f4:
195 alt[j++] = 0x1e;
196 break;
197 case 0x2:
198 alt[j++] = 0x500fa;
199 break;
200 case 0x500fa:
201 alt[j++] = 0x2;
202 break;
203 }
204 }
205 nalt = j;
206 }
207
208 return nalt;
209}
210
211
212
213
214
215static int power7_marked_instr_event(u64 event)
216{
217 int pmc, psel;
218 int unit;
219
220 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
221 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
222 psel = event & PM_PMCSEL_MSK & ~1;
223 if (pmc >= 5)
224 return 0;
225
226 switch (psel >> 4) {
227 case 2:
228 return pmc == 2 || pmc == 4;
229 case 3:
230 if (psel == 0x3c)
231 return pmc == 1;
232 if (psel == 0x3e)
233 return pmc != 2;
234 return 1;
235 case 4:
236 case 5:
237 return unit == 0xd;
238 case 6:
239 if (psel == 0x64)
240 return pmc >= 3;
241 case 8:
242 return unit == 0xd;
243 }
244 return 0;
245}
246
247static int power7_compute_mmcr(u64 event[], int n_ev,
248 unsigned int hwc[], unsigned long mmcr[], struct perf_event *pevents[])
249{
250 unsigned long mmcr1 = 0;
251 unsigned long mmcra = MMCRA_SDAR_DCACHE_MISS | MMCRA_SDAR_ERAT_MISS;
252 unsigned int pmc, unit, combine, l2sel, psel;
253 unsigned int pmc_inuse = 0;
254 int i;
255
256
257 for (i = 0; i < n_ev; ++i) {
258 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
259 if (pmc) {
260 if (pmc > 6)
261 return -1;
262 if (pmc_inuse & (1 << (pmc - 1)))
263 return -1;
264 pmc_inuse |= 1 << (pmc - 1);
265 }
266 }
267
268
269 for (i = 0; i < n_ev; ++i) {
270 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
271 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
272 combine = (event[i] >> PM_COMBINE_SH) & PM_COMBINE_MSK;
273 l2sel = (event[i] >> PM_L2SEL_SH) & PM_L2SEL_MSK;
274 psel = event[i] & PM_PMCSEL_MSK;
275 if (!pmc) {
276
277 for (pmc = 0; pmc < 4; ++pmc) {
278 if (!(pmc_inuse & (1 << pmc)))
279 break;
280 }
281 if (pmc >= 4)
282 return -1;
283 pmc_inuse |= 1 << pmc;
284 } else {
285
286 --pmc;
287 }
288 if (pmc <= 3) {
289 mmcr1 |= (unsigned long) unit
290 << (MMCR1_TTM0SEL_SH - 4 * pmc);
291 mmcr1 |= (unsigned long) combine
292 << (MMCR1_PMC1_COMBINE_SH - pmc);
293 mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
294 if (unit == 6)
295 mmcr1 |= (unsigned long) l2sel
296 << MMCR1_L2SEL_SH;
297 }
298 if (power7_marked_instr_event(event[i]))
299 mmcra |= MMCRA_SAMPLE_ENABLE;
300 hwc[i] = pmc;
301 }
302
303
304 mmcr[0] = 0;
305 if (pmc_inuse & 1)
306 mmcr[0] = MMCR0_PMC1CE;
307 if (pmc_inuse & 0x3e)
308 mmcr[0] |= MMCR0_PMCjCE;
309 mmcr[1] = mmcr1;
310 mmcr[2] = mmcra;
311 return 0;
312}
313
314static void power7_disable_pmc(unsigned int pmc, unsigned long mmcr[])
315{
316 if (pmc <= 3)
317 mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SH(pmc));
318}
319
320static int power7_generic_events[] = {
321 [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC,
322 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_GCT_NOSLOT_CYC,
323 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL,
324 [PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL,
325 [PERF_COUNT_HW_CACHE_REFERENCES] = PM_LD_REF_L1,
326 [PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1,
327 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BRU_FIN,
328 [PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED,
329};
330
331#define C(x) PERF_COUNT_HW_CACHE_##x
332
333
334
335
336
337
338static int power7_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
339 [C(L1D)] = {
340 [C(OP_READ)] = { 0xc880, 0x400f0 },
341 [C(OP_WRITE)] = { 0, 0x300f0 },
342 [C(OP_PREFETCH)] = { 0xd8b8, 0 },
343 },
344 [C(L1I)] = {
345 [C(OP_READ)] = { 0, 0x200fc },
346 [C(OP_WRITE)] = { -1, -1 },
347 [C(OP_PREFETCH)] = { 0x408a, 0 },
348 },
349 [C(LL)] = {
350 [C(OP_READ)] = { 0x16080, 0x26080 },
351 [C(OP_WRITE)] = { 0x16082, 0x26082 },
352 [C(OP_PREFETCH)] = { 0, 0 },
353 },
354 [C(DTLB)] = {
355 [C(OP_READ)] = { 0, 0x300fc },
356 [C(OP_WRITE)] = { -1, -1 },
357 [C(OP_PREFETCH)] = { -1, -1 },
358 },
359 [C(ITLB)] = {
360 [C(OP_READ)] = { 0, 0x400fc },
361 [C(OP_WRITE)] = { -1, -1 },
362 [C(OP_PREFETCH)] = { -1, -1 },
363 },
364 [C(BPU)] = {
365 [C(OP_READ)] = { 0x10068, 0x400f6 },
366 [C(OP_WRITE)] = { -1, -1 },
367 [C(OP_PREFETCH)] = { -1, -1 },
368 },
369 [C(NODE)] = {
370 [C(OP_READ)] = { -1, -1 },
371 [C(OP_WRITE)] = { -1, -1 },
372 [C(OP_PREFETCH)] = { -1, -1 },
373 },
374};
375
376
377GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC);
378GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_GCT_NOSLOT_CYC);
379GENERIC_EVENT_ATTR(stalled-cycles-backend, PM_CMPLU_STALL);
380GENERIC_EVENT_ATTR(instructions, PM_INST_CMPL);
381GENERIC_EVENT_ATTR(cache-references, PM_LD_REF_L1);
382GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1);
383GENERIC_EVENT_ATTR(branch-instructions, PM_BRU_FIN);
384GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED);
385
386#define EVENT(_name, _code) POWER_EVENT_ATTR(_name, _name);
387#include "power7-events-list.h"
388#undef EVENT
389
390#define EVENT(_name, _code) POWER_EVENT_PTR(_name),
391
392static struct attribute *power7_events_attr[] = {
393 GENERIC_EVENT_PTR(PM_CYC),
394 GENERIC_EVENT_PTR(PM_GCT_NOSLOT_CYC),
395 GENERIC_EVENT_PTR(PM_CMPLU_STALL),
396 GENERIC_EVENT_PTR(PM_INST_CMPL),
397 GENERIC_EVENT_PTR(PM_LD_REF_L1),
398 GENERIC_EVENT_PTR(PM_LD_MISS_L1),
399 GENERIC_EVENT_PTR(PM_BRU_FIN),
400 GENERIC_EVENT_PTR(PM_BR_MPRED),
401
402 #include "power7-events-list.h"
403 #undef EVENT
404 NULL
405};
406
407static struct attribute_group power7_pmu_events_group = {
408 .name = "events",
409 .attrs = power7_events_attr,
410};
411
412PMU_FORMAT_ATTR(event, "config:0-19");
413
414static struct attribute *power7_pmu_format_attr[] = {
415 &format_attr_event.attr,
416 NULL,
417};
418
419struct attribute_group power7_pmu_format_group = {
420 .name = "format",
421 .attrs = power7_pmu_format_attr,
422};
423
424static const struct attribute_group *power7_pmu_attr_groups[] = {
425 &power7_pmu_format_group,
426 &power7_pmu_events_group,
427 NULL,
428};
429
430static struct power_pmu power7_pmu = {
431 .name = "POWER7",
432 .n_counter = 6,
433 .max_alternatives = MAX_ALT + 1,
434 .add_fields = 0x1555ul,
435 .test_adder = 0x3000ul,
436 .compute_mmcr = power7_compute_mmcr,
437 .get_constraint = power7_get_constraint,
438 .get_alternatives = power7_get_alternatives,
439 .disable_pmc = power7_disable_pmc,
440 .flags = PPMU_ALT_SIPR,
441 .attr_groups = power7_pmu_attr_groups,
442 .n_generic = ARRAY_SIZE(power7_generic_events),
443 .generic_events = power7_generic_events,
444 .cache_events = &power7_cache_events,
445};
446
447static int __init init_power7_pmu(void)
448{
449 if (!cur_cpu_spec->oprofile_cpu_type ||
450 strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power7"))
451 return -ENODEV;
452
453 if (pvr_version_is(PVR_POWER7p))
454 power7_pmu.flags |= PPMU_SIAR_VALID;
455
456 return register_power_pmu(&power7_pmu);
457}
458
459early_initcall(init_power7_pmu);
460
