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241771ef IM |
1 | /* |
2 | * Performance counter x86 architecture code | |
3 | * | |
98144511 IM |
4 | * Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de> |
5 | * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar | |
6 | * Copyright (C) 2009 Jaswinder Singh Rajput | |
7 | * Copyright (C) 2009 Advanced Micro Devices, Inc., Robert Richter | |
8 | * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> | |
241771ef IM |
9 | * |
10 | * For licencing details see kernel-base/COPYING | |
11 | */ | |
12 | ||
13 | #include <linux/perf_counter.h> | |
14 | #include <linux/capability.h> | |
15 | #include <linux/notifier.h> | |
16 | #include <linux/hardirq.h> | |
17 | #include <linux/kprobes.h> | |
4ac13294 | 18 | #include <linux/module.h> |
241771ef IM |
19 | #include <linux/kdebug.h> |
20 | #include <linux/sched.h> | |
d7d59fb3 | 21 | #include <linux/uaccess.h> |
241771ef | 22 | |
241771ef | 23 | #include <asm/apic.h> |
d7d59fb3 | 24 | #include <asm/stacktrace.h> |
4e935e47 | 25 | #include <asm/nmi.h> |
241771ef | 26 | |
862a1a5f | 27 | static u64 perf_counter_mask __read_mostly; |
703e937c | 28 | |
241771ef | 29 | struct cpu_hw_counters { |
862a1a5f | 30 | struct perf_counter *counters[X86_PMC_IDX_MAX]; |
43f6201a RR |
31 | unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; |
32 | unsigned long active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; | |
4b39fd96 | 33 | unsigned long interrupts; |
b0f3f28e | 34 | int enabled; |
241771ef IM |
35 | }; |
36 | ||
37 | /* | |
5f4ec28f | 38 | * struct x86_pmu - generic x86 pmu |
241771ef | 39 | */ |
5f4ec28f | 40 | struct x86_pmu { |
faa28ae0 RR |
41 | const char *name; |
42 | int version; | |
a3288106 | 43 | int (*handle_irq)(struct pt_regs *); |
9e35ad38 PZ |
44 | void (*disable_all)(void); |
45 | void (*enable_all)(void); | |
7c90cc45 | 46 | void (*enable)(struct hw_perf_counter *, int); |
d4369891 | 47 | void (*disable)(struct hw_perf_counter *, int); |
169e41eb JSR |
48 | unsigned eventsel; |
49 | unsigned perfctr; | |
b0f3f28e PZ |
50 | u64 (*event_map)(int); |
51 | u64 (*raw_event)(u64); | |
169e41eb | 52 | int max_events; |
0933e5c6 RR |
53 | int num_counters; |
54 | int num_counters_fixed; | |
55 | int counter_bits; | |
56 | u64 counter_mask; | |
c619b8ff | 57 | u64 max_period; |
9e35ad38 | 58 | u64 intel_ctrl; |
b56a3802 JSR |
59 | }; |
60 | ||
4a06bd85 | 61 | static struct x86_pmu x86_pmu __read_mostly; |
b56a3802 | 62 | |
b0f3f28e PZ |
63 | static DEFINE_PER_CPU(struct cpu_hw_counters, cpu_hw_counters) = { |
64 | .enabled = 1, | |
65 | }; | |
241771ef | 66 | |
b56a3802 JSR |
67 | /* |
68 | * Intel PerfMon v3. Used on Core2 and later. | |
69 | */ | |
b0f3f28e | 70 | static const u64 intel_perfmon_event_map[] = |
241771ef | 71 | { |
f650a672 | 72 | [PERF_COUNT_CPU_CYCLES] = 0x003c, |
241771ef IM |
73 | [PERF_COUNT_INSTRUCTIONS] = 0x00c0, |
74 | [PERF_COUNT_CACHE_REFERENCES] = 0x4f2e, | |
75 | [PERF_COUNT_CACHE_MISSES] = 0x412e, | |
76 | [PERF_COUNT_BRANCH_INSTRUCTIONS] = 0x00c4, | |
77 | [PERF_COUNT_BRANCH_MISSES] = 0x00c5, | |
f650a672 | 78 | [PERF_COUNT_BUS_CYCLES] = 0x013c, |
241771ef IM |
79 | }; |
80 | ||
5f4ec28f | 81 | static u64 intel_pmu_event_map(int event) |
b56a3802 JSR |
82 | { |
83 | return intel_perfmon_event_map[event]; | |
84 | } | |
241771ef | 85 | |
8326f44d IM |
86 | /* |
87 | * Generalized hw caching related event table, filled | |
88 | * in on a per model basis. A value of 0 means | |
89 | * 'not supported', -1 means 'event makes no sense on | |
90 | * this CPU', any other value means the raw event | |
91 | * ID. | |
92 | */ | |
93 | ||
94 | #define C(x) PERF_COUNT_HW_CACHE_##x | |
95 | ||
96 | static u64 __read_mostly hw_cache_event_ids | |
97 | [PERF_COUNT_HW_CACHE_MAX] | |
98 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
99 | [PERF_COUNT_HW_CACHE_RESULT_MAX]; | |
100 | ||
101 | static const u64 nehalem_hw_cache_event_ids | |
102 | [PERF_COUNT_HW_CACHE_MAX] | |
103 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
104 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = | |
105 | { | |
106 | [ C(L1D) ] = { | |
107 | [ C(OP_READ) ] = { | |
108 | [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI */ | |
109 | [ C(RESULT_MISS) ] = 0x0140, /* L1D_CACHE_LD.I_STATE */ | |
110 | }, | |
111 | [ C(OP_WRITE) ] = { | |
112 | [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI */ | |
113 | [ C(RESULT_MISS) ] = 0x0141, /* L1D_CACHE_ST.I_STATE */ | |
114 | }, | |
115 | [ C(OP_PREFETCH) ] = { | |
116 | [ C(RESULT_ACCESS) ] = 0x014e, /* L1D_PREFETCH.REQUESTS */ | |
117 | [ C(RESULT_MISS) ] = 0x024e, /* L1D_PREFETCH.MISS */ | |
118 | }, | |
119 | }, | |
120 | [ C(L1I ) ] = { | |
121 | [ C(OP_READ) ] = { | |
fecc8ac8 | 122 | [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS */ |
8326f44d IM |
123 | [ C(RESULT_MISS) ] = 0x0280, /* L1I.MISSES */ |
124 | }, | |
125 | [ C(OP_WRITE) ] = { | |
126 | [ C(RESULT_ACCESS) ] = -1, | |
127 | [ C(RESULT_MISS) ] = -1, | |
128 | }, | |
129 | [ C(OP_PREFETCH) ] = { | |
130 | [ C(RESULT_ACCESS) ] = 0x0, | |
131 | [ C(RESULT_MISS) ] = 0x0, | |
132 | }, | |
133 | }, | |
134 | [ C(L2 ) ] = { | |
135 | [ C(OP_READ) ] = { | |
136 | [ C(RESULT_ACCESS) ] = 0x0324, /* L2_RQSTS.LOADS */ | |
137 | [ C(RESULT_MISS) ] = 0x0224, /* L2_RQSTS.LD_MISS */ | |
138 | }, | |
139 | [ C(OP_WRITE) ] = { | |
140 | [ C(RESULT_ACCESS) ] = 0x0c24, /* L2_RQSTS.RFOS */ | |
141 | [ C(RESULT_MISS) ] = 0x0824, /* L2_RQSTS.RFO_MISS */ | |
142 | }, | |
143 | [ C(OP_PREFETCH) ] = { | |
144 | [ C(RESULT_ACCESS) ] = 0xc024, /* L2_RQSTS.PREFETCHES */ | |
145 | [ C(RESULT_MISS) ] = 0x8024, /* L2_RQSTS.PREFETCH_MISS */ | |
146 | }, | |
147 | }, | |
148 | [ C(DTLB) ] = { | |
149 | [ C(OP_READ) ] = { | |
150 | [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI (alias) */ | |
151 | [ C(RESULT_MISS) ] = 0x0108, /* DTLB_LOAD_MISSES.ANY */ | |
152 | }, | |
153 | [ C(OP_WRITE) ] = { | |
154 | [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI (alias) */ | |
155 | [ C(RESULT_MISS) ] = 0x010c, /* MEM_STORE_RETIRED.DTLB_MISS */ | |
156 | }, | |
157 | [ C(OP_PREFETCH) ] = { | |
158 | [ C(RESULT_ACCESS) ] = 0x0, | |
159 | [ C(RESULT_MISS) ] = 0x0, | |
160 | }, | |
161 | }, | |
162 | [ C(ITLB) ] = { | |
163 | [ C(OP_READ) ] = { | |
164 | [ C(RESULT_ACCESS) ] = 0x01c0, /* INST_RETIRED.ANY_P */ | |
fecc8ac8 | 165 | [ C(RESULT_MISS) ] = 0x20c8, /* ITLB_MISS_RETIRED */ |
8326f44d IM |
166 | }, |
167 | [ C(OP_WRITE) ] = { | |
168 | [ C(RESULT_ACCESS) ] = -1, | |
169 | [ C(RESULT_MISS) ] = -1, | |
170 | }, | |
171 | [ C(OP_PREFETCH) ] = { | |
172 | [ C(RESULT_ACCESS) ] = -1, | |
173 | [ C(RESULT_MISS) ] = -1, | |
174 | }, | |
175 | }, | |
176 | [ C(BPU ) ] = { | |
177 | [ C(OP_READ) ] = { | |
178 | [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */ | |
179 | [ C(RESULT_MISS) ] = 0x03e8, /* BPU_CLEARS.ANY */ | |
180 | }, | |
181 | [ C(OP_WRITE) ] = { | |
182 | [ C(RESULT_ACCESS) ] = -1, | |
183 | [ C(RESULT_MISS) ] = -1, | |
184 | }, | |
185 | [ C(OP_PREFETCH) ] = { | |
186 | [ C(RESULT_ACCESS) ] = -1, | |
187 | [ C(RESULT_MISS) ] = -1, | |
188 | }, | |
189 | }, | |
190 | }; | |
191 | ||
192 | static const u64 core2_hw_cache_event_ids | |
193 | [PERF_COUNT_HW_CACHE_MAX] | |
194 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
195 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = | |
196 | { | |
0312af84 TG |
197 | [ C(L1D) ] = { |
198 | [ C(OP_READ) ] = { | |
199 | [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI */ | |
200 | [ C(RESULT_MISS) ] = 0x0140, /* L1D_CACHE_LD.I_STATE */ | |
201 | }, | |
202 | [ C(OP_WRITE) ] = { | |
203 | [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI */ | |
204 | [ C(RESULT_MISS) ] = 0x0141, /* L1D_CACHE_ST.I_STATE */ | |
205 | }, | |
206 | [ C(OP_PREFETCH) ] = { | |
207 | [ C(RESULT_ACCESS) ] = 0x104e, /* L1D_PREFETCH.REQUESTS */ | |
208 | [ C(RESULT_MISS) ] = 0, | |
209 | }, | |
210 | }, | |
211 | [ C(L1I ) ] = { | |
212 | [ C(OP_READ) ] = { | |
213 | [ C(RESULT_ACCESS) ] = 0x0080, /* L1I.READS */ | |
214 | [ C(RESULT_MISS) ] = 0x0081, /* L1I.MISSES */ | |
215 | }, | |
216 | [ C(OP_WRITE) ] = { | |
217 | [ C(RESULT_ACCESS) ] = -1, | |
218 | [ C(RESULT_MISS) ] = -1, | |
219 | }, | |
220 | [ C(OP_PREFETCH) ] = { | |
221 | [ C(RESULT_ACCESS) ] = 0, | |
222 | [ C(RESULT_MISS) ] = 0, | |
223 | }, | |
224 | }, | |
225 | [ C(L2 ) ] = { | |
226 | [ C(OP_READ) ] = { | |
227 | [ C(RESULT_ACCESS) ] = 0x4f29, /* L2_LD.MESI */ | |
228 | [ C(RESULT_MISS) ] = 0x4129, /* L2_LD.ISTATE */ | |
229 | }, | |
230 | [ C(OP_WRITE) ] = { | |
231 | [ C(RESULT_ACCESS) ] = 0x4f2A, /* L2_ST.MESI */ | |
232 | [ C(RESULT_MISS) ] = 0x412A, /* L2_ST.ISTATE */ | |
233 | }, | |
234 | [ C(OP_PREFETCH) ] = { | |
235 | [ C(RESULT_ACCESS) ] = 0, | |
236 | [ C(RESULT_MISS) ] = 0, | |
237 | }, | |
238 | }, | |
239 | [ C(DTLB) ] = { | |
240 | [ C(OP_READ) ] = { | |
241 | [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI (alias) */ | |
242 | [ C(RESULT_MISS) ] = 0x0208, /* DTLB_MISSES.MISS_LD */ | |
243 | }, | |
244 | [ C(OP_WRITE) ] = { | |
245 | [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI (alias) */ | |
246 | [ C(RESULT_MISS) ] = 0x0808, /* DTLB_MISSES.MISS_ST */ | |
247 | }, | |
248 | [ C(OP_PREFETCH) ] = { | |
249 | [ C(RESULT_ACCESS) ] = 0, | |
250 | [ C(RESULT_MISS) ] = 0, | |
251 | }, | |
252 | }, | |
253 | [ C(ITLB) ] = { | |
254 | [ C(OP_READ) ] = { | |
255 | [ C(RESULT_ACCESS) ] = 0x00c0, /* INST_RETIRED.ANY_P */ | |
256 | [ C(RESULT_MISS) ] = 0x1282, /* ITLBMISSES */ | |
257 | }, | |
258 | [ C(OP_WRITE) ] = { | |
259 | [ C(RESULT_ACCESS) ] = -1, | |
260 | [ C(RESULT_MISS) ] = -1, | |
261 | }, | |
262 | [ C(OP_PREFETCH) ] = { | |
263 | [ C(RESULT_ACCESS) ] = -1, | |
264 | [ C(RESULT_MISS) ] = -1, | |
265 | }, | |
266 | }, | |
267 | [ C(BPU ) ] = { | |
268 | [ C(OP_READ) ] = { | |
269 | [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ANY */ | |
270 | [ C(RESULT_MISS) ] = 0x00c5, /* BP_INST_RETIRED.MISPRED */ | |
271 | }, | |
272 | [ C(OP_WRITE) ] = { | |
273 | [ C(RESULT_ACCESS) ] = -1, | |
274 | [ C(RESULT_MISS) ] = -1, | |
275 | }, | |
276 | [ C(OP_PREFETCH) ] = { | |
277 | [ C(RESULT_ACCESS) ] = -1, | |
278 | [ C(RESULT_MISS) ] = -1, | |
279 | }, | |
280 | }, | |
8326f44d IM |
281 | }; |
282 | ||
283 | static const u64 atom_hw_cache_event_ids | |
284 | [PERF_COUNT_HW_CACHE_MAX] | |
285 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
286 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = | |
287 | { | |
ad689220 TG |
288 | [ C(L1D) ] = { |
289 | [ C(OP_READ) ] = { | |
290 | [ C(RESULT_ACCESS) ] = 0x2140, /* L1D_CACHE.LD */ | |
291 | [ C(RESULT_MISS) ] = 0, | |
292 | }, | |
293 | [ C(OP_WRITE) ] = { | |
fecc8ac8 | 294 | [ C(RESULT_ACCESS) ] = 0x2240, /* L1D_CACHE.ST */ |
ad689220 TG |
295 | [ C(RESULT_MISS) ] = 0, |
296 | }, | |
297 | [ C(OP_PREFETCH) ] = { | |
298 | [ C(RESULT_ACCESS) ] = 0x0, | |
299 | [ C(RESULT_MISS) ] = 0, | |
300 | }, | |
301 | }, | |
302 | [ C(L1I ) ] = { | |
303 | [ C(OP_READ) ] = { | |
fecc8ac8 YW |
304 | [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS */ |
305 | [ C(RESULT_MISS) ] = 0x0280, /* L1I.MISSES */ | |
ad689220 TG |
306 | }, |
307 | [ C(OP_WRITE) ] = { | |
308 | [ C(RESULT_ACCESS) ] = -1, | |
309 | [ C(RESULT_MISS) ] = -1, | |
310 | }, | |
311 | [ C(OP_PREFETCH) ] = { | |
312 | [ C(RESULT_ACCESS) ] = 0, | |
313 | [ C(RESULT_MISS) ] = 0, | |
314 | }, | |
315 | }, | |
316 | [ C(L2 ) ] = { | |
317 | [ C(OP_READ) ] = { | |
318 | [ C(RESULT_ACCESS) ] = 0x4f29, /* L2_LD.MESI */ | |
319 | [ C(RESULT_MISS) ] = 0x4129, /* L2_LD.ISTATE */ | |
320 | }, | |
321 | [ C(OP_WRITE) ] = { | |
322 | [ C(RESULT_ACCESS) ] = 0x4f2A, /* L2_ST.MESI */ | |
323 | [ C(RESULT_MISS) ] = 0x412A, /* L2_ST.ISTATE */ | |
324 | }, | |
325 | [ C(OP_PREFETCH) ] = { | |
326 | [ C(RESULT_ACCESS) ] = 0, | |
327 | [ C(RESULT_MISS) ] = 0, | |
328 | }, | |
329 | }, | |
330 | [ C(DTLB) ] = { | |
331 | [ C(OP_READ) ] = { | |
fecc8ac8 | 332 | [ C(RESULT_ACCESS) ] = 0x2140, /* L1D_CACHE_LD.MESI (alias) */ |
ad689220 TG |
333 | [ C(RESULT_MISS) ] = 0x0508, /* DTLB_MISSES.MISS_LD */ |
334 | }, | |
335 | [ C(OP_WRITE) ] = { | |
fecc8ac8 | 336 | [ C(RESULT_ACCESS) ] = 0x2240, /* L1D_CACHE_ST.MESI (alias) */ |
ad689220 TG |
337 | [ C(RESULT_MISS) ] = 0x0608, /* DTLB_MISSES.MISS_ST */ |
338 | }, | |
339 | [ C(OP_PREFETCH) ] = { | |
340 | [ C(RESULT_ACCESS) ] = 0, | |
341 | [ C(RESULT_MISS) ] = 0, | |
342 | }, | |
343 | }, | |
344 | [ C(ITLB) ] = { | |
345 | [ C(OP_READ) ] = { | |
346 | [ C(RESULT_ACCESS) ] = 0x00c0, /* INST_RETIRED.ANY_P */ | |
347 | [ C(RESULT_MISS) ] = 0x0282, /* ITLB.MISSES */ | |
348 | }, | |
349 | [ C(OP_WRITE) ] = { | |
350 | [ C(RESULT_ACCESS) ] = -1, | |
351 | [ C(RESULT_MISS) ] = -1, | |
352 | }, | |
353 | [ C(OP_PREFETCH) ] = { | |
354 | [ C(RESULT_ACCESS) ] = -1, | |
355 | [ C(RESULT_MISS) ] = -1, | |
356 | }, | |
357 | }, | |
358 | [ C(BPU ) ] = { | |
359 | [ C(OP_READ) ] = { | |
360 | [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ANY */ | |
361 | [ C(RESULT_MISS) ] = 0x00c5, /* BP_INST_RETIRED.MISPRED */ | |
362 | }, | |
363 | [ C(OP_WRITE) ] = { | |
364 | [ C(RESULT_ACCESS) ] = -1, | |
365 | [ C(RESULT_MISS) ] = -1, | |
366 | }, | |
367 | [ C(OP_PREFETCH) ] = { | |
368 | [ C(RESULT_ACCESS) ] = -1, | |
369 | [ C(RESULT_MISS) ] = -1, | |
370 | }, | |
371 | }, | |
8326f44d IM |
372 | }; |
373 | ||
5f4ec28f | 374 | static u64 intel_pmu_raw_event(u64 event) |
b0f3f28e | 375 | { |
82bae4f8 PZ |
376 | #define CORE_EVNTSEL_EVENT_MASK 0x000000FFULL |
377 | #define CORE_EVNTSEL_UNIT_MASK 0x0000FF00ULL | |
ff99be57 PZ |
378 | #define CORE_EVNTSEL_EDGE_MASK 0x00040000ULL |
379 | #define CORE_EVNTSEL_INV_MASK 0x00800000ULL | |
82bae4f8 | 380 | #define CORE_EVNTSEL_COUNTER_MASK 0xFF000000ULL |
b0f3f28e | 381 | |
128f048f | 382 | #define CORE_EVNTSEL_MASK \ |
b0f3f28e PZ |
383 | (CORE_EVNTSEL_EVENT_MASK | \ |
384 | CORE_EVNTSEL_UNIT_MASK | \ | |
ff99be57 PZ |
385 | CORE_EVNTSEL_EDGE_MASK | \ |
386 | CORE_EVNTSEL_INV_MASK | \ | |
b0f3f28e PZ |
387 | CORE_EVNTSEL_COUNTER_MASK) |
388 | ||
389 | return event & CORE_EVNTSEL_MASK; | |
390 | } | |
391 | ||
f86748e9 TG |
392 | static const u64 amd_0f_hw_cache_event_ids |
393 | [PERF_COUNT_HW_CACHE_MAX] | |
394 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
395 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = | |
396 | { | |
397 | [ C(L1D) ] = { | |
398 | [ C(OP_READ) ] = { | |
399 | [ C(RESULT_ACCESS) ] = 0, | |
400 | [ C(RESULT_MISS) ] = 0, | |
401 | }, | |
402 | [ C(OP_WRITE) ] = { | |
403 | [ C(RESULT_ACCESS) ] = 0, | |
404 | [ C(RESULT_MISS) ] = 0, | |
405 | }, | |
406 | [ C(OP_PREFETCH) ] = { | |
407 | [ C(RESULT_ACCESS) ] = 0, | |
408 | [ C(RESULT_MISS) ] = 0, | |
409 | }, | |
410 | }, | |
411 | [ C(L1I ) ] = { | |
412 | [ C(OP_READ) ] = { | |
413 | [ C(RESULT_ACCESS) ] = 0x0080, /* Instruction cache fetches */ | |
414 | [ C(RESULT_MISS) ] = 0x0081, /* Instruction cache misses */ | |
415 | }, | |
416 | [ C(OP_WRITE) ] = { | |
417 | [ C(RESULT_ACCESS) ] = -1, | |
418 | [ C(RESULT_MISS) ] = -1, | |
419 | }, | |
420 | [ C(OP_PREFETCH) ] = { | |
421 | [ C(RESULT_ACCESS) ] = 0, | |
422 | [ C(RESULT_MISS) ] = 0, | |
423 | }, | |
424 | }, | |
425 | [ C(L2 ) ] = { | |
426 | [ C(OP_READ) ] = { | |
427 | [ C(RESULT_ACCESS) ] = 0, | |
428 | [ C(RESULT_MISS) ] = 0, | |
429 | }, | |
430 | [ C(OP_WRITE) ] = { | |
431 | [ C(RESULT_ACCESS) ] = 0, | |
432 | [ C(RESULT_MISS) ] = 0, | |
433 | }, | |
434 | [ C(OP_PREFETCH) ] = { | |
435 | [ C(RESULT_ACCESS) ] = 0, | |
436 | [ C(RESULT_MISS) ] = 0, | |
437 | }, | |
438 | }, | |
439 | [ C(DTLB) ] = { | |
440 | [ C(OP_READ) ] = { | |
441 | [ C(RESULT_ACCESS) ] = 0, | |
442 | [ C(RESULT_MISS) ] = 0, | |
443 | }, | |
444 | [ C(OP_WRITE) ] = { | |
445 | [ C(RESULT_ACCESS) ] = 0, | |
446 | [ C(RESULT_MISS) ] = 0, | |
447 | }, | |
448 | [ C(OP_PREFETCH) ] = { | |
449 | [ C(RESULT_ACCESS) ] = 0, | |
450 | [ C(RESULT_MISS) ] = 0, | |
451 | }, | |
452 | }, | |
453 | [ C(ITLB) ] = { | |
454 | [ C(OP_READ) ] = { | |
455 | [ C(RESULT_ACCESS) ] = 0x0080, /* Instruction fecthes */ | |
456 | [ C(RESULT_MISS) ] = 0x0085, /* Instr. fetch ITLB misses */ | |
457 | }, | |
458 | [ C(OP_WRITE) ] = { | |
459 | [ C(RESULT_ACCESS) ] = -1, | |
460 | [ C(RESULT_MISS) ] = -1, | |
461 | }, | |
462 | [ C(OP_PREFETCH) ] = { | |
463 | [ C(RESULT_ACCESS) ] = -1, | |
464 | [ C(RESULT_MISS) ] = -1, | |
465 | }, | |
466 | }, | |
467 | [ C(BPU ) ] = { | |
468 | [ C(OP_READ) ] = { | |
469 | [ C(RESULT_ACCESS) ] = 0x00c2, /* Retired Branch Instr. */ | |
470 | [ C(RESULT_MISS) ] = 0x00c3, /* Retired Mispredicted BI */ | |
471 | }, | |
472 | [ C(OP_WRITE) ] = { | |
473 | [ C(RESULT_ACCESS) ] = -1, | |
474 | [ C(RESULT_MISS) ] = -1, | |
475 | }, | |
476 | [ C(OP_PREFETCH) ] = { | |
477 | [ C(RESULT_ACCESS) ] = -1, | |
478 | [ C(RESULT_MISS) ] = -1, | |
479 | }, | |
480 | }, | |
481 | }; | |
482 | ||
f87ad35d JSR |
483 | /* |
484 | * AMD Performance Monitor K7 and later. | |
485 | */ | |
b0f3f28e | 486 | static const u64 amd_perfmon_event_map[] = |
f87ad35d JSR |
487 | { |
488 | [PERF_COUNT_CPU_CYCLES] = 0x0076, | |
489 | [PERF_COUNT_INSTRUCTIONS] = 0x00c0, | |
490 | [PERF_COUNT_CACHE_REFERENCES] = 0x0080, | |
491 | [PERF_COUNT_CACHE_MISSES] = 0x0081, | |
492 | [PERF_COUNT_BRANCH_INSTRUCTIONS] = 0x00c4, | |
493 | [PERF_COUNT_BRANCH_MISSES] = 0x00c5, | |
494 | }; | |
495 | ||
5f4ec28f | 496 | static u64 amd_pmu_event_map(int event) |
f87ad35d JSR |
497 | { |
498 | return amd_perfmon_event_map[event]; | |
499 | } | |
500 | ||
5f4ec28f | 501 | static u64 amd_pmu_raw_event(u64 event) |
b0f3f28e | 502 | { |
82bae4f8 PZ |
503 | #define K7_EVNTSEL_EVENT_MASK 0x7000000FFULL |
504 | #define K7_EVNTSEL_UNIT_MASK 0x00000FF00ULL | |
ff99be57 PZ |
505 | #define K7_EVNTSEL_EDGE_MASK 0x000040000ULL |
506 | #define K7_EVNTSEL_INV_MASK 0x000800000ULL | |
82bae4f8 | 507 | #define K7_EVNTSEL_COUNTER_MASK 0x0FF000000ULL |
b0f3f28e PZ |
508 | |
509 | #define K7_EVNTSEL_MASK \ | |
510 | (K7_EVNTSEL_EVENT_MASK | \ | |
511 | K7_EVNTSEL_UNIT_MASK | \ | |
ff99be57 PZ |
512 | K7_EVNTSEL_EDGE_MASK | \ |
513 | K7_EVNTSEL_INV_MASK | \ | |
b0f3f28e PZ |
514 | K7_EVNTSEL_COUNTER_MASK) |
515 | ||
516 | return event & K7_EVNTSEL_MASK; | |
517 | } | |
518 | ||
ee06094f IM |
519 | /* |
520 | * Propagate counter elapsed time into the generic counter. | |
521 | * Can only be executed on the CPU where the counter is active. | |
522 | * Returns the delta events processed. | |
523 | */ | |
4b7bfd0d | 524 | static u64 |
ee06094f IM |
525 | x86_perf_counter_update(struct perf_counter *counter, |
526 | struct hw_perf_counter *hwc, int idx) | |
527 | { | |
ec3232bd PZ |
528 | int shift = 64 - x86_pmu.counter_bits; |
529 | u64 prev_raw_count, new_raw_count; | |
530 | s64 delta; | |
ee06094f | 531 | |
ee06094f IM |
532 | /* |
533 | * Careful: an NMI might modify the previous counter value. | |
534 | * | |
535 | * Our tactic to handle this is to first atomically read and | |
536 | * exchange a new raw count - then add that new-prev delta | |
537 | * count to the generic counter atomically: | |
538 | */ | |
539 | again: | |
540 | prev_raw_count = atomic64_read(&hwc->prev_count); | |
541 | rdmsrl(hwc->counter_base + idx, new_raw_count); | |
542 | ||
543 | if (atomic64_cmpxchg(&hwc->prev_count, prev_raw_count, | |
544 | new_raw_count) != prev_raw_count) | |
545 | goto again; | |
546 | ||
547 | /* | |
548 | * Now we have the new raw value and have updated the prev | |
549 | * timestamp already. We can now calculate the elapsed delta | |
550 | * (counter-)time and add that to the generic counter. | |
551 | * | |
552 | * Careful, not all hw sign-extends above the physical width | |
ec3232bd | 553 | * of the count. |
ee06094f | 554 | */ |
ec3232bd PZ |
555 | delta = (new_raw_count << shift) - (prev_raw_count << shift); |
556 | delta >>= shift; | |
ee06094f IM |
557 | |
558 | atomic64_add(delta, &counter->count); | |
559 | atomic64_sub(delta, &hwc->period_left); | |
4b7bfd0d RR |
560 | |
561 | return new_raw_count; | |
ee06094f IM |
562 | } |
563 | ||
ba77813a | 564 | static atomic_t active_counters; |
4e935e47 PZ |
565 | static DEFINE_MUTEX(pmc_reserve_mutex); |
566 | ||
567 | static bool reserve_pmc_hardware(void) | |
568 | { | |
569 | int i; | |
570 | ||
571 | if (nmi_watchdog == NMI_LOCAL_APIC) | |
572 | disable_lapic_nmi_watchdog(); | |
573 | ||
0933e5c6 | 574 | for (i = 0; i < x86_pmu.num_counters; i++) { |
4a06bd85 | 575 | if (!reserve_perfctr_nmi(x86_pmu.perfctr + i)) |
4e935e47 PZ |
576 | goto perfctr_fail; |
577 | } | |
578 | ||
0933e5c6 | 579 | for (i = 0; i < x86_pmu.num_counters; i++) { |
4a06bd85 | 580 | if (!reserve_evntsel_nmi(x86_pmu.eventsel + i)) |
4e935e47 PZ |
581 | goto eventsel_fail; |
582 | } | |
583 | ||
584 | return true; | |
585 | ||
586 | eventsel_fail: | |
587 | for (i--; i >= 0; i--) | |
4a06bd85 | 588 | release_evntsel_nmi(x86_pmu.eventsel + i); |
4e935e47 | 589 | |
0933e5c6 | 590 | i = x86_pmu.num_counters; |
4e935e47 PZ |
591 | |
592 | perfctr_fail: | |
593 | for (i--; i >= 0; i--) | |
4a06bd85 | 594 | release_perfctr_nmi(x86_pmu.perfctr + i); |
4e935e47 PZ |
595 | |
596 | if (nmi_watchdog == NMI_LOCAL_APIC) | |
597 | enable_lapic_nmi_watchdog(); | |
598 | ||
599 | return false; | |
600 | } | |
601 | ||
602 | static void release_pmc_hardware(void) | |
603 | { | |
604 | int i; | |
605 | ||
0933e5c6 | 606 | for (i = 0; i < x86_pmu.num_counters; i++) { |
4a06bd85 RR |
607 | release_perfctr_nmi(x86_pmu.perfctr + i); |
608 | release_evntsel_nmi(x86_pmu.eventsel + i); | |
4e935e47 PZ |
609 | } |
610 | ||
611 | if (nmi_watchdog == NMI_LOCAL_APIC) | |
612 | enable_lapic_nmi_watchdog(); | |
613 | } | |
614 | ||
615 | static void hw_perf_counter_destroy(struct perf_counter *counter) | |
616 | { | |
ba77813a | 617 | if (atomic_dec_and_mutex_lock(&active_counters, &pmc_reserve_mutex)) { |
4e935e47 PZ |
618 | release_pmc_hardware(); |
619 | mutex_unlock(&pmc_reserve_mutex); | |
620 | } | |
621 | } | |
622 | ||
85cf9dba RR |
623 | static inline int x86_pmu_initialized(void) |
624 | { | |
625 | return x86_pmu.handle_irq != NULL; | |
626 | } | |
627 | ||
8326f44d IM |
628 | static inline int |
629 | set_ext_hw_attr(struct hw_perf_counter *hwc, struct perf_counter_attr *attr) | |
630 | { | |
631 | unsigned int cache_type, cache_op, cache_result; | |
632 | u64 config, val; | |
633 | ||
634 | config = attr->config; | |
635 | ||
636 | cache_type = (config >> 0) & 0xff; | |
637 | if (cache_type >= PERF_COUNT_HW_CACHE_MAX) | |
638 | return -EINVAL; | |
639 | ||
640 | cache_op = (config >> 8) & 0xff; | |
641 | if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX) | |
642 | return -EINVAL; | |
643 | ||
644 | cache_result = (config >> 16) & 0xff; | |
645 | if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX) | |
646 | return -EINVAL; | |
647 | ||
648 | val = hw_cache_event_ids[cache_type][cache_op][cache_result]; | |
649 | ||
650 | if (val == 0) | |
651 | return -ENOENT; | |
652 | ||
653 | if (val == -1) | |
654 | return -EINVAL; | |
655 | ||
656 | hwc->config |= val; | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
241771ef | 661 | /* |
0d48696f | 662 | * Setup the hardware configuration for a given attr_type |
241771ef | 663 | */ |
621a01ea | 664 | static int __hw_perf_counter_init(struct perf_counter *counter) |
241771ef | 665 | { |
0d48696f | 666 | struct perf_counter_attr *attr = &counter->attr; |
241771ef | 667 | struct hw_perf_counter *hwc = &counter->hw; |
4e935e47 | 668 | int err; |
241771ef | 669 | |
85cf9dba RR |
670 | if (!x86_pmu_initialized()) |
671 | return -ENODEV; | |
241771ef | 672 | |
4e935e47 | 673 | err = 0; |
ba77813a | 674 | if (!atomic_inc_not_zero(&active_counters)) { |
4e935e47 | 675 | mutex_lock(&pmc_reserve_mutex); |
ba77813a | 676 | if (atomic_read(&active_counters) == 0 && !reserve_pmc_hardware()) |
4e935e47 PZ |
677 | err = -EBUSY; |
678 | else | |
ba77813a | 679 | atomic_inc(&active_counters); |
4e935e47 PZ |
680 | mutex_unlock(&pmc_reserve_mutex); |
681 | } | |
682 | if (err) | |
683 | return err; | |
684 | ||
241771ef | 685 | /* |
0475f9ea | 686 | * Generate PMC IRQs: |
241771ef IM |
687 | * (keep 'enabled' bit clear for now) |
688 | */ | |
0475f9ea | 689 | hwc->config = ARCH_PERFMON_EVENTSEL_INT; |
241771ef IM |
690 | |
691 | /* | |
0475f9ea | 692 | * Count user and OS events unless requested not to. |
241771ef | 693 | */ |
0d48696f | 694 | if (!attr->exclude_user) |
0475f9ea | 695 | hwc->config |= ARCH_PERFMON_EVENTSEL_USR; |
0d48696f | 696 | if (!attr->exclude_kernel) |
241771ef | 697 | hwc->config |= ARCH_PERFMON_EVENTSEL_OS; |
0475f9ea | 698 | |
bd2b5b12 | 699 | if (!hwc->sample_period) { |
b23f3325 | 700 | hwc->sample_period = x86_pmu.max_period; |
bd2b5b12 PZ |
701 | atomic64_set(&hwc->period_left, hwc->sample_period); |
702 | } | |
d2517a49 | 703 | |
8326f44d | 704 | counter->destroy = hw_perf_counter_destroy; |
241771ef IM |
705 | |
706 | /* | |
dfa7c899 | 707 | * Raw event type provide the config in the event structure |
241771ef | 708 | */ |
a21ca2ca IM |
709 | if (attr->type == PERF_TYPE_RAW) { |
710 | hwc->config |= x86_pmu.raw_event(attr->config); | |
8326f44d | 711 | return 0; |
241771ef | 712 | } |
241771ef | 713 | |
8326f44d IM |
714 | if (attr->type == PERF_TYPE_HW_CACHE) |
715 | return set_ext_hw_attr(hwc, attr); | |
716 | ||
717 | if (attr->config >= x86_pmu.max_events) | |
718 | return -EINVAL; | |
719 | /* | |
720 | * The generic map: | |
721 | */ | |
722 | hwc->config |= x86_pmu.event_map(attr->config); | |
4e935e47 | 723 | |
241771ef IM |
724 | return 0; |
725 | } | |
726 | ||
9e35ad38 | 727 | static void intel_pmu_disable_all(void) |
4ac13294 | 728 | { |
862a1a5f | 729 | wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0); |
241771ef | 730 | } |
b56a3802 | 731 | |
9e35ad38 | 732 | static void amd_pmu_disable_all(void) |
f87ad35d | 733 | { |
b0f3f28e | 734 | struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); |
9e35ad38 PZ |
735 | int idx; |
736 | ||
737 | if (!cpuc->enabled) | |
738 | return; | |
b0f3f28e | 739 | |
b0f3f28e | 740 | cpuc->enabled = 0; |
60b3df9c PZ |
741 | /* |
742 | * ensure we write the disable before we start disabling the | |
5f4ec28f RR |
743 | * counters proper, so that amd_pmu_enable_counter() does the |
744 | * right thing. | |
60b3df9c | 745 | */ |
b0f3f28e | 746 | barrier(); |
f87ad35d | 747 | |
0933e5c6 | 748 | for (idx = 0; idx < x86_pmu.num_counters; idx++) { |
b0f3f28e PZ |
749 | u64 val; |
750 | ||
43f6201a | 751 | if (!test_bit(idx, cpuc->active_mask)) |
4295ee62 | 752 | continue; |
f87ad35d | 753 | rdmsrl(MSR_K7_EVNTSEL0 + idx, val); |
4295ee62 RR |
754 | if (!(val & ARCH_PERFMON_EVENTSEL0_ENABLE)) |
755 | continue; | |
756 | val &= ~ARCH_PERFMON_EVENTSEL0_ENABLE; | |
757 | wrmsrl(MSR_K7_EVNTSEL0 + idx, val); | |
f87ad35d | 758 | } |
f87ad35d JSR |
759 | } |
760 | ||
9e35ad38 | 761 | void hw_perf_disable(void) |
b56a3802 | 762 | { |
85cf9dba | 763 | if (!x86_pmu_initialized()) |
9e35ad38 PZ |
764 | return; |
765 | return x86_pmu.disable_all(); | |
b56a3802 | 766 | } |
241771ef | 767 | |
9e35ad38 | 768 | static void intel_pmu_enable_all(void) |
b56a3802 | 769 | { |
9e35ad38 | 770 | wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, x86_pmu.intel_ctrl); |
b56a3802 JSR |
771 | } |
772 | ||
9e35ad38 | 773 | static void amd_pmu_enable_all(void) |
f87ad35d | 774 | { |
b0f3f28e | 775 | struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); |
f87ad35d JSR |
776 | int idx; |
777 | ||
9e35ad38 | 778 | if (cpuc->enabled) |
b0f3f28e PZ |
779 | return; |
780 | ||
9e35ad38 PZ |
781 | cpuc->enabled = 1; |
782 | barrier(); | |
783 | ||
0933e5c6 | 784 | for (idx = 0; idx < x86_pmu.num_counters; idx++) { |
4295ee62 | 785 | u64 val; |
b0f3f28e | 786 | |
43f6201a | 787 | if (!test_bit(idx, cpuc->active_mask)) |
4295ee62 RR |
788 | continue; |
789 | rdmsrl(MSR_K7_EVNTSEL0 + idx, val); | |
790 | if (val & ARCH_PERFMON_EVENTSEL0_ENABLE) | |
791 | continue; | |
792 | val |= ARCH_PERFMON_EVENTSEL0_ENABLE; | |
793 | wrmsrl(MSR_K7_EVNTSEL0 + idx, val); | |
f87ad35d JSR |
794 | } |
795 | } | |
796 | ||
9e35ad38 | 797 | void hw_perf_enable(void) |
ee06094f | 798 | { |
85cf9dba | 799 | if (!x86_pmu_initialized()) |
2b9ff0db | 800 | return; |
9e35ad38 | 801 | x86_pmu.enable_all(); |
ee06094f | 802 | } |
ee06094f | 803 | |
19d84dab | 804 | static inline u64 intel_pmu_get_status(void) |
b0f3f28e PZ |
805 | { |
806 | u64 status; | |
807 | ||
b7f8859a | 808 | rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status); |
b0f3f28e | 809 | |
b7f8859a | 810 | return status; |
b0f3f28e PZ |
811 | } |
812 | ||
dee5d906 | 813 | static inline void intel_pmu_ack_status(u64 ack) |
b0f3f28e PZ |
814 | { |
815 | wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, ack); | |
816 | } | |
817 | ||
7c90cc45 | 818 | static inline void x86_pmu_enable_counter(struct hw_perf_counter *hwc, int idx) |
b0f3f28e | 819 | { |
7c90cc45 | 820 | int err; |
7c90cc45 RR |
821 | err = checking_wrmsrl(hwc->config_base + idx, |
822 | hwc->config | ARCH_PERFMON_EVENTSEL0_ENABLE); | |
b0f3f28e PZ |
823 | } |
824 | ||
d4369891 | 825 | static inline void x86_pmu_disable_counter(struct hw_perf_counter *hwc, int idx) |
b0f3f28e | 826 | { |
d4369891 | 827 | int err; |
d4369891 RR |
828 | err = checking_wrmsrl(hwc->config_base + idx, |
829 | hwc->config); | |
b0f3f28e PZ |
830 | } |
831 | ||
2f18d1e8 | 832 | static inline void |
d4369891 | 833 | intel_pmu_disable_fixed(struct hw_perf_counter *hwc, int __idx) |
2f18d1e8 IM |
834 | { |
835 | int idx = __idx - X86_PMC_IDX_FIXED; | |
836 | u64 ctrl_val, mask; | |
837 | int err; | |
838 | ||
839 | mask = 0xfULL << (idx * 4); | |
840 | ||
841 | rdmsrl(hwc->config_base, ctrl_val); | |
842 | ctrl_val &= ~mask; | |
843 | err = checking_wrmsrl(hwc->config_base, ctrl_val); | |
844 | } | |
845 | ||
7e2ae347 | 846 | static inline void |
d4369891 | 847 | intel_pmu_disable_counter(struct hw_perf_counter *hwc, int idx) |
7e2ae347 | 848 | { |
d4369891 RR |
849 | if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) { |
850 | intel_pmu_disable_fixed(hwc, idx); | |
851 | return; | |
852 | } | |
853 | ||
854 | x86_pmu_disable_counter(hwc, idx); | |
855 | } | |
856 | ||
857 | static inline void | |
858 | amd_pmu_disable_counter(struct hw_perf_counter *hwc, int idx) | |
859 | { | |
860 | x86_pmu_disable_counter(hwc, idx); | |
7e2ae347 IM |
861 | } |
862 | ||
2f18d1e8 | 863 | static DEFINE_PER_CPU(u64, prev_left[X86_PMC_IDX_MAX]); |
241771ef | 864 | |
ee06094f IM |
865 | /* |
866 | * Set the next IRQ period, based on the hwc->period_left value. | |
867 | * To be called with the counter disabled in hw: | |
868 | */ | |
e4abb5d4 | 869 | static int |
26816c28 | 870 | x86_perf_counter_set_period(struct perf_counter *counter, |
ee06094f | 871 | struct hw_perf_counter *hwc, int idx) |
241771ef | 872 | { |
2f18d1e8 | 873 | s64 left = atomic64_read(&hwc->period_left); |
e4abb5d4 PZ |
874 | s64 period = hwc->sample_period; |
875 | int err, ret = 0; | |
ee06094f | 876 | |
ee06094f IM |
877 | /* |
878 | * If we are way outside a reasoable range then just skip forward: | |
879 | */ | |
880 | if (unlikely(left <= -period)) { | |
881 | left = period; | |
882 | atomic64_set(&hwc->period_left, left); | |
e4abb5d4 | 883 | ret = 1; |
ee06094f IM |
884 | } |
885 | ||
886 | if (unlikely(left <= 0)) { | |
887 | left += period; | |
888 | atomic64_set(&hwc->period_left, left); | |
e4abb5d4 | 889 | ret = 1; |
ee06094f | 890 | } |
1c80f4b5 IM |
891 | /* |
892 | * Quirk: certain CPUs dont like it if just 1 event is left: | |
893 | */ | |
894 | if (unlikely(left < 2)) | |
895 | left = 2; | |
241771ef | 896 | |
e4abb5d4 PZ |
897 | if (left > x86_pmu.max_period) |
898 | left = x86_pmu.max_period; | |
899 | ||
ee06094f IM |
900 | per_cpu(prev_left[idx], smp_processor_id()) = left; |
901 | ||
902 | /* | |
903 | * The hw counter starts counting from this counter offset, | |
904 | * mark it to be able to extra future deltas: | |
905 | */ | |
2f18d1e8 | 906 | atomic64_set(&hwc->prev_count, (u64)-left); |
ee06094f | 907 | |
2f18d1e8 | 908 | err = checking_wrmsrl(hwc->counter_base + idx, |
0933e5c6 | 909 | (u64)(-left) & x86_pmu.counter_mask); |
e4abb5d4 PZ |
910 | |
911 | return ret; | |
2f18d1e8 IM |
912 | } |
913 | ||
914 | static inline void | |
7c90cc45 | 915 | intel_pmu_enable_fixed(struct hw_perf_counter *hwc, int __idx) |
2f18d1e8 IM |
916 | { |
917 | int idx = __idx - X86_PMC_IDX_FIXED; | |
918 | u64 ctrl_val, bits, mask; | |
919 | int err; | |
920 | ||
921 | /* | |
0475f9ea PM |
922 | * Enable IRQ generation (0x8), |
923 | * and enable ring-3 counting (0x2) and ring-0 counting (0x1) | |
924 | * if requested: | |
2f18d1e8 | 925 | */ |
0475f9ea PM |
926 | bits = 0x8ULL; |
927 | if (hwc->config & ARCH_PERFMON_EVENTSEL_USR) | |
928 | bits |= 0x2; | |
2f18d1e8 IM |
929 | if (hwc->config & ARCH_PERFMON_EVENTSEL_OS) |
930 | bits |= 0x1; | |
931 | bits <<= (idx * 4); | |
932 | mask = 0xfULL << (idx * 4); | |
933 | ||
934 | rdmsrl(hwc->config_base, ctrl_val); | |
935 | ctrl_val &= ~mask; | |
936 | ctrl_val |= bits; | |
937 | err = checking_wrmsrl(hwc->config_base, ctrl_val); | |
7e2ae347 IM |
938 | } |
939 | ||
7c90cc45 | 940 | static void intel_pmu_enable_counter(struct hw_perf_counter *hwc, int idx) |
7e2ae347 | 941 | { |
7c90cc45 RR |
942 | if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) { |
943 | intel_pmu_enable_fixed(hwc, idx); | |
944 | return; | |
945 | } | |
946 | ||
947 | x86_pmu_enable_counter(hwc, idx); | |
948 | } | |
949 | ||
950 | static void amd_pmu_enable_counter(struct hw_perf_counter *hwc, int idx) | |
951 | { | |
952 | struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); | |
953 | ||
954 | if (cpuc->enabled) | |
955 | x86_pmu_enable_counter(hwc, idx); | |
2b583d8b | 956 | else |
d4369891 | 957 | x86_pmu_disable_counter(hwc, idx); |
241771ef IM |
958 | } |
959 | ||
2f18d1e8 IM |
960 | static int |
961 | fixed_mode_idx(struct perf_counter *counter, struct hw_perf_counter *hwc) | |
862a1a5f | 962 | { |
2f18d1e8 IM |
963 | unsigned int event; |
964 | ||
ef7b3e09 | 965 | if (!x86_pmu.num_counters_fixed) |
f87ad35d JSR |
966 | return -1; |
967 | ||
2f18d1e8 IM |
968 | event = hwc->config & ARCH_PERFMON_EVENT_MASK; |
969 | ||
4a06bd85 | 970 | if (unlikely(event == x86_pmu.event_map(PERF_COUNT_INSTRUCTIONS))) |
2f18d1e8 | 971 | return X86_PMC_IDX_FIXED_INSTRUCTIONS; |
4a06bd85 | 972 | if (unlikely(event == x86_pmu.event_map(PERF_COUNT_CPU_CYCLES))) |
2f18d1e8 | 973 | return X86_PMC_IDX_FIXED_CPU_CYCLES; |
4a06bd85 | 974 | if (unlikely(event == x86_pmu.event_map(PERF_COUNT_BUS_CYCLES))) |
2f18d1e8 IM |
975 | return X86_PMC_IDX_FIXED_BUS_CYCLES; |
976 | ||
862a1a5f IM |
977 | return -1; |
978 | } | |
979 | ||
ee06094f IM |
980 | /* |
981 | * Find a PMC slot for the freshly enabled / scheduled in counter: | |
982 | */ | |
4aeb0b42 | 983 | static int x86_pmu_enable(struct perf_counter *counter) |
241771ef IM |
984 | { |
985 | struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); | |
986 | struct hw_perf_counter *hwc = &counter->hw; | |
2f18d1e8 | 987 | int idx; |
241771ef | 988 | |
2f18d1e8 IM |
989 | idx = fixed_mode_idx(counter, hwc); |
990 | if (idx >= 0) { | |
991 | /* | |
992 | * Try to get the fixed counter, if that is already taken | |
993 | * then try to get a generic counter: | |
994 | */ | |
43f6201a | 995 | if (test_and_set_bit(idx, cpuc->used_mask)) |
2f18d1e8 | 996 | goto try_generic; |
0dff86aa | 997 | |
2f18d1e8 IM |
998 | hwc->config_base = MSR_ARCH_PERFMON_FIXED_CTR_CTRL; |
999 | /* | |
1000 | * We set it so that counter_base + idx in wrmsr/rdmsr maps to | |
1001 | * MSR_ARCH_PERFMON_FIXED_CTR0 ... CTR2: | |
1002 | */ | |
1003 | hwc->counter_base = | |
1004 | MSR_ARCH_PERFMON_FIXED_CTR0 - X86_PMC_IDX_FIXED; | |
241771ef | 1005 | hwc->idx = idx; |
2f18d1e8 IM |
1006 | } else { |
1007 | idx = hwc->idx; | |
1008 | /* Try to get the previous generic counter again */ | |
43f6201a | 1009 | if (test_and_set_bit(idx, cpuc->used_mask)) { |
2f18d1e8 | 1010 | try_generic: |
43f6201a | 1011 | idx = find_first_zero_bit(cpuc->used_mask, |
0933e5c6 RR |
1012 | x86_pmu.num_counters); |
1013 | if (idx == x86_pmu.num_counters) | |
2f18d1e8 IM |
1014 | return -EAGAIN; |
1015 | ||
43f6201a | 1016 | set_bit(idx, cpuc->used_mask); |
2f18d1e8 IM |
1017 | hwc->idx = idx; |
1018 | } | |
4a06bd85 RR |
1019 | hwc->config_base = x86_pmu.eventsel; |
1020 | hwc->counter_base = x86_pmu.perfctr; | |
241771ef IM |
1021 | } |
1022 | ||
c323d95f | 1023 | perf_counters_lapic_init(); |
53b441a5 | 1024 | |
d4369891 | 1025 | x86_pmu.disable(hwc, idx); |
241771ef | 1026 | |
862a1a5f | 1027 | cpuc->counters[idx] = counter; |
43f6201a | 1028 | set_bit(idx, cpuc->active_mask); |
7e2ae347 | 1029 | |
26816c28 | 1030 | x86_perf_counter_set_period(counter, hwc, idx); |
7c90cc45 | 1031 | x86_pmu.enable(hwc, idx); |
95cdd2e7 IM |
1032 | |
1033 | return 0; | |
241771ef IM |
1034 | } |
1035 | ||
a78ac325 PZ |
1036 | static void x86_pmu_unthrottle(struct perf_counter *counter) |
1037 | { | |
1038 | struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); | |
1039 | struct hw_perf_counter *hwc = &counter->hw; | |
1040 | ||
1041 | if (WARN_ON_ONCE(hwc->idx >= X86_PMC_IDX_MAX || | |
1042 | cpuc->counters[hwc->idx] != counter)) | |
1043 | return; | |
1044 | ||
1045 | x86_pmu.enable(hwc, hwc->idx); | |
1046 | } | |
1047 | ||
241771ef IM |
1048 | void perf_counter_print_debug(void) |
1049 | { | |
2f18d1e8 | 1050 | u64 ctrl, status, overflow, pmc_ctrl, pmc_count, prev_left, fixed; |
0dff86aa | 1051 | struct cpu_hw_counters *cpuc; |
5bb9efe3 | 1052 | unsigned long flags; |
1e125676 IM |
1053 | int cpu, idx; |
1054 | ||
0933e5c6 | 1055 | if (!x86_pmu.num_counters) |
1e125676 | 1056 | return; |
241771ef | 1057 | |
5bb9efe3 | 1058 | local_irq_save(flags); |
241771ef IM |
1059 | |
1060 | cpu = smp_processor_id(); | |
0dff86aa | 1061 | cpuc = &per_cpu(cpu_hw_counters, cpu); |
241771ef | 1062 | |
faa28ae0 | 1063 | if (x86_pmu.version >= 2) { |
a1ef58f4 JSR |
1064 | rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, ctrl); |
1065 | rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status); | |
1066 | rdmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, overflow); | |
1067 | rdmsrl(MSR_ARCH_PERFMON_FIXED_CTR_CTRL, fixed); | |
1068 | ||
1069 | pr_info("\n"); | |
1070 | pr_info("CPU#%d: ctrl: %016llx\n", cpu, ctrl); | |
1071 | pr_info("CPU#%d: status: %016llx\n", cpu, status); | |
1072 | pr_info("CPU#%d: overflow: %016llx\n", cpu, overflow); | |
1073 | pr_info("CPU#%d: fixed: %016llx\n", cpu, fixed); | |
f87ad35d | 1074 | } |
43f6201a | 1075 | pr_info("CPU#%d: used: %016llx\n", cpu, *(u64 *)cpuc->used_mask); |
241771ef | 1076 | |
0933e5c6 | 1077 | for (idx = 0; idx < x86_pmu.num_counters; idx++) { |
4a06bd85 RR |
1078 | rdmsrl(x86_pmu.eventsel + idx, pmc_ctrl); |
1079 | rdmsrl(x86_pmu.perfctr + idx, pmc_count); | |
241771ef | 1080 | |
ee06094f | 1081 | prev_left = per_cpu(prev_left[idx], cpu); |
241771ef | 1082 | |
a1ef58f4 | 1083 | pr_info("CPU#%d: gen-PMC%d ctrl: %016llx\n", |
241771ef | 1084 | cpu, idx, pmc_ctrl); |
a1ef58f4 | 1085 | pr_info("CPU#%d: gen-PMC%d count: %016llx\n", |
241771ef | 1086 | cpu, idx, pmc_count); |
a1ef58f4 | 1087 | pr_info("CPU#%d: gen-PMC%d left: %016llx\n", |
ee06094f | 1088 | cpu, idx, prev_left); |
241771ef | 1089 | } |
0933e5c6 | 1090 | for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++) { |
2f18d1e8 IM |
1091 | rdmsrl(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, pmc_count); |
1092 | ||
a1ef58f4 | 1093 | pr_info("CPU#%d: fixed-PMC%d count: %016llx\n", |
2f18d1e8 IM |
1094 | cpu, idx, pmc_count); |
1095 | } | |
5bb9efe3 | 1096 | local_irq_restore(flags); |
241771ef IM |
1097 | } |
1098 | ||
4aeb0b42 | 1099 | static void x86_pmu_disable(struct perf_counter *counter) |
241771ef IM |
1100 | { |
1101 | struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); | |
1102 | struct hw_perf_counter *hwc = &counter->hw; | |
6f00cada | 1103 | int idx = hwc->idx; |
241771ef | 1104 | |
09534238 RR |
1105 | /* |
1106 | * Must be done before we disable, otherwise the nmi handler | |
1107 | * could reenable again: | |
1108 | */ | |
43f6201a | 1109 | clear_bit(idx, cpuc->active_mask); |
d4369891 | 1110 | x86_pmu.disable(hwc, idx); |
241771ef | 1111 | |
2f18d1e8 IM |
1112 | /* |
1113 | * Make sure the cleared pointer becomes visible before we | |
1114 | * (potentially) free the counter: | |
1115 | */ | |
527e26af | 1116 | barrier(); |
241771ef | 1117 | |
ee06094f IM |
1118 | /* |
1119 | * Drain the remaining delta count out of a counter | |
1120 | * that we are disabling: | |
1121 | */ | |
1122 | x86_perf_counter_update(counter, hwc, idx); | |
09534238 | 1123 | cpuc->counters[idx] = NULL; |
43f6201a | 1124 | clear_bit(idx, cpuc->used_mask); |
241771ef IM |
1125 | } |
1126 | ||
7e2ae347 | 1127 | /* |
ee06094f IM |
1128 | * Save and restart an expired counter. Called by NMI contexts, |
1129 | * so it has to be careful about preempting normal counter ops: | |
7e2ae347 | 1130 | */ |
e4abb5d4 | 1131 | static int intel_pmu_save_and_restart(struct perf_counter *counter) |
241771ef IM |
1132 | { |
1133 | struct hw_perf_counter *hwc = &counter->hw; | |
1134 | int idx = hwc->idx; | |
e4abb5d4 | 1135 | int ret; |
241771ef | 1136 | |
ee06094f | 1137 | x86_perf_counter_update(counter, hwc, idx); |
e4abb5d4 | 1138 | ret = x86_perf_counter_set_period(counter, hwc, idx); |
7e2ae347 | 1139 | |
2f18d1e8 | 1140 | if (counter->state == PERF_COUNTER_STATE_ACTIVE) |
7c90cc45 | 1141 | intel_pmu_enable_counter(hwc, idx); |
e4abb5d4 PZ |
1142 | |
1143 | return ret; | |
241771ef IM |
1144 | } |
1145 | ||
aaba9801 IM |
1146 | static void intel_pmu_reset(void) |
1147 | { | |
1148 | unsigned long flags; | |
1149 | int idx; | |
1150 | ||
1151 | if (!x86_pmu.num_counters) | |
1152 | return; | |
1153 | ||
1154 | local_irq_save(flags); | |
1155 | ||
1156 | printk("clearing PMU state on CPU#%d\n", smp_processor_id()); | |
1157 | ||
1158 | for (idx = 0; idx < x86_pmu.num_counters; idx++) { | |
1159 | checking_wrmsrl(x86_pmu.eventsel + idx, 0ull); | |
1160 | checking_wrmsrl(x86_pmu.perfctr + idx, 0ull); | |
1161 | } | |
1162 | for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++) { | |
1163 | checking_wrmsrl(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, 0ull); | |
1164 | } | |
1165 | ||
1166 | local_irq_restore(flags); | |
1167 | } | |
1168 | ||
1169 | ||
241771ef IM |
1170 | /* |
1171 | * This handler is triggered by the local APIC, so the APIC IRQ handling | |
1172 | * rules apply: | |
1173 | */ | |
a3288106 | 1174 | static int intel_pmu_handle_irq(struct pt_regs *regs) |
241771ef | 1175 | { |
df1a132b | 1176 | struct perf_sample_data data; |
9029a5e3 | 1177 | struct cpu_hw_counters *cpuc; |
9029a5e3 | 1178 | int bit, cpu, loops; |
4b39fd96 | 1179 | u64 ack, status; |
9029a5e3 | 1180 | |
df1a132b PZ |
1181 | data.regs = regs; |
1182 | data.addr = 0; | |
1183 | ||
9029a5e3 IM |
1184 | cpu = smp_processor_id(); |
1185 | cpuc = &per_cpu(cpu_hw_counters, cpu); | |
241771ef | 1186 | |
9e35ad38 | 1187 | perf_disable(); |
19d84dab | 1188 | status = intel_pmu_get_status(); |
9e35ad38 PZ |
1189 | if (!status) { |
1190 | perf_enable(); | |
1191 | return 0; | |
1192 | } | |
87b9cf46 | 1193 | |
9029a5e3 | 1194 | loops = 0; |
241771ef | 1195 | again: |
9029a5e3 IM |
1196 | if (++loops > 100) { |
1197 | WARN_ONCE(1, "perfcounters: irq loop stuck!\n"); | |
34adc806 | 1198 | perf_counter_print_debug(); |
aaba9801 IM |
1199 | intel_pmu_reset(); |
1200 | perf_enable(); | |
9029a5e3 IM |
1201 | return 1; |
1202 | } | |
1203 | ||
d278c484 | 1204 | inc_irq_stat(apic_perf_irqs); |
241771ef | 1205 | ack = status; |
2f18d1e8 | 1206 | for_each_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) { |
862a1a5f | 1207 | struct perf_counter *counter = cpuc->counters[bit]; |
241771ef IM |
1208 | |
1209 | clear_bit(bit, (unsigned long *) &status); | |
43f6201a | 1210 | if (!test_bit(bit, cpuc->active_mask)) |
241771ef IM |
1211 | continue; |
1212 | ||
e4abb5d4 PZ |
1213 | if (!intel_pmu_save_and_restart(counter)) |
1214 | continue; | |
1215 | ||
df1a132b | 1216 | if (perf_counter_overflow(counter, 1, &data)) |
d4369891 | 1217 | intel_pmu_disable_counter(&counter->hw, bit); |
241771ef IM |
1218 | } |
1219 | ||
dee5d906 | 1220 | intel_pmu_ack_status(ack); |
241771ef IM |
1221 | |
1222 | /* | |
1223 | * Repeat if there is more work to be done: | |
1224 | */ | |
19d84dab | 1225 | status = intel_pmu_get_status(); |
241771ef IM |
1226 | if (status) |
1227 | goto again; | |
b0f3f28e | 1228 | |
48e22d56 | 1229 | perf_enable(); |
9e35ad38 PZ |
1230 | |
1231 | return 1; | |
1b023a96 MG |
1232 | } |
1233 | ||
a3288106 | 1234 | static int amd_pmu_handle_irq(struct pt_regs *regs) |
a29aa8a7 | 1235 | { |
df1a132b | 1236 | struct perf_sample_data data; |
9029a5e3 | 1237 | struct cpu_hw_counters *cpuc; |
a29aa8a7 RR |
1238 | struct perf_counter *counter; |
1239 | struct hw_perf_counter *hwc; | |
df1a132b | 1240 | int cpu, idx, handled = 0; |
9029a5e3 IM |
1241 | u64 val; |
1242 | ||
df1a132b PZ |
1243 | data.regs = regs; |
1244 | data.addr = 0; | |
1245 | ||
9029a5e3 IM |
1246 | cpu = smp_processor_id(); |
1247 | cpuc = &per_cpu(cpu_hw_counters, cpu); | |
962bf7a6 | 1248 | |
a29aa8a7 | 1249 | for (idx = 0; idx < x86_pmu.num_counters; idx++) { |
43f6201a | 1250 | if (!test_bit(idx, cpuc->active_mask)) |
a29aa8a7 | 1251 | continue; |
962bf7a6 | 1252 | |
a29aa8a7 RR |
1253 | counter = cpuc->counters[idx]; |
1254 | hwc = &counter->hw; | |
a4016a79 | 1255 | |
4b7bfd0d | 1256 | val = x86_perf_counter_update(counter, hwc, idx); |
a29aa8a7 | 1257 | if (val & (1ULL << (x86_pmu.counter_bits - 1))) |
48e22d56 | 1258 | continue; |
962bf7a6 | 1259 | |
a29aa8a7 | 1260 | /* counter overflow */ |
a29aa8a7 RR |
1261 | handled = 1; |
1262 | inc_irq_stat(apic_perf_irqs); | |
e4abb5d4 PZ |
1263 | if (!x86_perf_counter_set_period(counter, hwc, idx)) |
1264 | continue; | |
1265 | ||
df1a132b | 1266 | if (perf_counter_overflow(counter, 1, &data)) |
a29aa8a7 | 1267 | amd_pmu_disable_counter(hwc, idx); |
a29aa8a7 | 1268 | } |
962bf7a6 | 1269 | |
a29aa8a7 RR |
1270 | return handled; |
1271 | } | |
39d81eab | 1272 | |
b6276f35 PZ |
1273 | void smp_perf_pending_interrupt(struct pt_regs *regs) |
1274 | { | |
1275 | irq_enter(); | |
1276 | ack_APIC_irq(); | |
1277 | inc_irq_stat(apic_pending_irqs); | |
1278 | perf_counter_do_pending(); | |
1279 | irq_exit(); | |
1280 | } | |
1281 | ||
1282 | void set_perf_counter_pending(void) | |
1283 | { | |
1284 | apic->send_IPI_self(LOCAL_PENDING_VECTOR); | |
1285 | } | |
1286 | ||
c323d95f | 1287 | void perf_counters_lapic_init(void) |
241771ef | 1288 | { |
85cf9dba | 1289 | if (!x86_pmu_initialized()) |
241771ef | 1290 | return; |
85cf9dba | 1291 | |
241771ef | 1292 | /* |
c323d95f | 1293 | * Always use NMI for PMU |
241771ef | 1294 | */ |
c323d95f | 1295 | apic_write(APIC_LVTPC, APIC_DM_NMI); |
241771ef IM |
1296 | } |
1297 | ||
1298 | static int __kprobes | |
1299 | perf_counter_nmi_handler(struct notifier_block *self, | |
1300 | unsigned long cmd, void *__args) | |
1301 | { | |
1302 | struct die_args *args = __args; | |
1303 | struct pt_regs *regs; | |
b0f3f28e | 1304 | |
ba77813a | 1305 | if (!atomic_read(&active_counters)) |
63a809a2 PZ |
1306 | return NOTIFY_DONE; |
1307 | ||
b0f3f28e PZ |
1308 | switch (cmd) { |
1309 | case DIE_NMI: | |
1310 | case DIE_NMI_IPI: | |
1311 | break; | |
241771ef | 1312 | |
b0f3f28e | 1313 | default: |
241771ef | 1314 | return NOTIFY_DONE; |
b0f3f28e | 1315 | } |
241771ef IM |
1316 | |
1317 | regs = args->regs; | |
1318 | ||
1319 | apic_write(APIC_LVTPC, APIC_DM_NMI); | |
a4016a79 PZ |
1320 | /* |
1321 | * Can't rely on the handled return value to say it was our NMI, two | |
1322 | * counters could trigger 'simultaneously' raising two back-to-back NMIs. | |
1323 | * | |
1324 | * If the first NMI handles both, the latter will be empty and daze | |
1325 | * the CPU. | |
1326 | */ | |
a3288106 | 1327 | x86_pmu.handle_irq(regs); |
241771ef | 1328 | |
a4016a79 | 1329 | return NOTIFY_STOP; |
241771ef IM |
1330 | } |
1331 | ||
1332 | static __read_mostly struct notifier_block perf_counter_nmi_notifier = { | |
5b75af0a MG |
1333 | .notifier_call = perf_counter_nmi_handler, |
1334 | .next = NULL, | |
1335 | .priority = 1 | |
241771ef IM |
1336 | }; |
1337 | ||
5f4ec28f | 1338 | static struct x86_pmu intel_pmu = { |
faa28ae0 | 1339 | .name = "Intel", |
39d81eab | 1340 | .handle_irq = intel_pmu_handle_irq, |
9e35ad38 PZ |
1341 | .disable_all = intel_pmu_disable_all, |
1342 | .enable_all = intel_pmu_enable_all, | |
5f4ec28f RR |
1343 | .enable = intel_pmu_enable_counter, |
1344 | .disable = intel_pmu_disable_counter, | |
b56a3802 JSR |
1345 | .eventsel = MSR_ARCH_PERFMON_EVENTSEL0, |
1346 | .perfctr = MSR_ARCH_PERFMON_PERFCTR0, | |
5f4ec28f RR |
1347 | .event_map = intel_pmu_event_map, |
1348 | .raw_event = intel_pmu_raw_event, | |
b56a3802 | 1349 | .max_events = ARRAY_SIZE(intel_perfmon_event_map), |
c619b8ff RR |
1350 | /* |
1351 | * Intel PMCs cannot be accessed sanely above 32 bit width, | |
1352 | * so we install an artificial 1<<31 period regardless of | |
1353 | * the generic counter period: | |
1354 | */ | |
1355 | .max_period = (1ULL << 31) - 1, | |
b56a3802 JSR |
1356 | }; |
1357 | ||
5f4ec28f | 1358 | static struct x86_pmu amd_pmu = { |
faa28ae0 | 1359 | .name = "AMD", |
39d81eab | 1360 | .handle_irq = amd_pmu_handle_irq, |
9e35ad38 PZ |
1361 | .disable_all = amd_pmu_disable_all, |
1362 | .enable_all = amd_pmu_enable_all, | |
5f4ec28f RR |
1363 | .enable = amd_pmu_enable_counter, |
1364 | .disable = amd_pmu_disable_counter, | |
f87ad35d JSR |
1365 | .eventsel = MSR_K7_EVNTSEL0, |
1366 | .perfctr = MSR_K7_PERFCTR0, | |
5f4ec28f RR |
1367 | .event_map = amd_pmu_event_map, |
1368 | .raw_event = amd_pmu_raw_event, | |
f87ad35d | 1369 | .max_events = ARRAY_SIZE(amd_perfmon_event_map), |
0933e5c6 RR |
1370 | .num_counters = 4, |
1371 | .counter_bits = 48, | |
1372 | .counter_mask = (1ULL << 48) - 1, | |
c619b8ff RR |
1373 | /* use highest bit to detect overflow */ |
1374 | .max_period = (1ULL << 47) - 1, | |
f87ad35d JSR |
1375 | }; |
1376 | ||
72eae04d | 1377 | static int intel_pmu_init(void) |
241771ef | 1378 | { |
7bb497bd | 1379 | union cpuid10_edx edx; |
241771ef | 1380 | union cpuid10_eax eax; |
703e937c | 1381 | unsigned int unused; |
7bb497bd | 1382 | unsigned int ebx; |
faa28ae0 | 1383 | int version; |
241771ef | 1384 | |
da1a776b | 1385 | if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) |
72eae04d | 1386 | return -ENODEV; |
da1a776b | 1387 | |
241771ef IM |
1388 | /* |
1389 | * Check whether the Architectural PerfMon supports | |
1390 | * Branch Misses Retired Event or not. | |
1391 | */ | |
703e937c | 1392 | cpuid(10, &eax.full, &ebx, &unused, &edx.full); |
241771ef | 1393 | if (eax.split.mask_length <= ARCH_PERFMON_BRANCH_MISSES_RETIRED) |
72eae04d | 1394 | return -ENODEV; |
241771ef | 1395 | |
faa28ae0 RR |
1396 | version = eax.split.version_id; |
1397 | if (version < 2) | |
72eae04d | 1398 | return -ENODEV; |
7bb497bd | 1399 | |
1123e3ad IM |
1400 | x86_pmu = intel_pmu; |
1401 | x86_pmu.version = version; | |
1402 | x86_pmu.num_counters = eax.split.num_counters; | |
1403 | x86_pmu.counter_bits = eax.split.bit_width; | |
1404 | x86_pmu.counter_mask = (1ULL << eax.split.bit_width) - 1; | |
066d7dea IM |
1405 | |
1406 | /* | |
1407 | * Quirk: v2 perfmon does not report fixed-purpose counters, so | |
1408 | * assume at least 3 counters: | |
1409 | */ | |
1123e3ad | 1410 | x86_pmu.num_counters_fixed = max((int)edx.split.num_counters_fixed, 3); |
b56a3802 | 1411 | |
9e35ad38 PZ |
1412 | rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, x86_pmu.intel_ctrl); |
1413 | ||
8326f44d | 1414 | /* |
1123e3ad | 1415 | * Install the hw-cache-events table: |
8326f44d IM |
1416 | */ |
1417 | switch (boot_cpu_data.x86_model) { | |
dc81081b YW |
1418 | case 15: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */ |
1419 | case 22: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */ | |
1420 | case 23: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */ | |
1421 | case 29: /* six-core 45 nm xeon "Dunnington" */ | |
8326f44d | 1422 | memcpy(hw_cache_event_ids, core2_hw_cache_event_ids, |
820a6442 | 1423 | sizeof(hw_cache_event_ids)); |
8326f44d | 1424 | |
1123e3ad | 1425 | pr_cont("Core2 events, "); |
8326f44d IM |
1426 | break; |
1427 | default: | |
1428 | case 26: | |
1429 | memcpy(hw_cache_event_ids, nehalem_hw_cache_event_ids, | |
820a6442 | 1430 | sizeof(hw_cache_event_ids)); |
8326f44d | 1431 | |
1123e3ad | 1432 | pr_cont("Nehalem/Corei7 events, "); |
8326f44d IM |
1433 | break; |
1434 | case 28: | |
1435 | memcpy(hw_cache_event_ids, atom_hw_cache_event_ids, | |
820a6442 | 1436 | sizeof(hw_cache_event_ids)); |
8326f44d | 1437 | |
1123e3ad | 1438 | pr_cont("Atom events, "); |
8326f44d IM |
1439 | break; |
1440 | } | |
72eae04d | 1441 | return 0; |
b56a3802 JSR |
1442 | } |
1443 | ||
72eae04d | 1444 | static int amd_pmu_init(void) |
f87ad35d | 1445 | { |
4a06bd85 | 1446 | x86_pmu = amd_pmu; |
f86748e9 TG |
1447 | |
1448 | switch (boot_cpu_data.x86) { | |
1449 | case 0x0f: | |
1450 | case 0x10: | |
1451 | case 0x11: | |
1452 | memcpy(hw_cache_event_ids, amd_0f_hw_cache_event_ids, | |
1453 | sizeof(hw_cache_event_ids)); | |
1454 | ||
1455 | pr_cont("AMD Family 0f/10/11 events, "); | |
1456 | break; | |
1457 | } | |
72eae04d | 1458 | return 0; |
f87ad35d JSR |
1459 | } |
1460 | ||
b56a3802 JSR |
1461 | void __init init_hw_perf_counters(void) |
1462 | { | |
72eae04d RR |
1463 | int err; |
1464 | ||
1123e3ad IM |
1465 | pr_info("Performance Counters: "); |
1466 | ||
b56a3802 JSR |
1467 | switch (boot_cpu_data.x86_vendor) { |
1468 | case X86_VENDOR_INTEL: | |
72eae04d | 1469 | err = intel_pmu_init(); |
b56a3802 | 1470 | break; |
f87ad35d | 1471 | case X86_VENDOR_AMD: |
72eae04d | 1472 | err = amd_pmu_init(); |
f87ad35d | 1473 | break; |
4138960a RR |
1474 | default: |
1475 | return; | |
b56a3802 | 1476 | } |
1123e3ad IM |
1477 | if (err != 0) { |
1478 | pr_cont("no PMU driver, software counters only.\n"); | |
b56a3802 | 1479 | return; |
1123e3ad | 1480 | } |
b56a3802 | 1481 | |
1123e3ad | 1482 | pr_cont("%s PMU driver.\n", x86_pmu.name); |
faa28ae0 | 1483 | |
0933e5c6 RR |
1484 | if (x86_pmu.num_counters > X86_PMC_MAX_GENERIC) { |
1485 | x86_pmu.num_counters = X86_PMC_MAX_GENERIC; | |
241771ef | 1486 | WARN(1, KERN_ERR "hw perf counters %d > max(%d), clipping!", |
0933e5c6 | 1487 | x86_pmu.num_counters, X86_PMC_MAX_GENERIC); |
241771ef | 1488 | } |
0933e5c6 RR |
1489 | perf_counter_mask = (1 << x86_pmu.num_counters) - 1; |
1490 | perf_max_counters = x86_pmu.num_counters; | |
241771ef | 1491 | |
0933e5c6 RR |
1492 | if (x86_pmu.num_counters_fixed > X86_PMC_MAX_FIXED) { |
1493 | x86_pmu.num_counters_fixed = X86_PMC_MAX_FIXED; | |
703e937c | 1494 | WARN(1, KERN_ERR "hw perf counters fixed %d > max(%d), clipping!", |
0933e5c6 | 1495 | x86_pmu.num_counters_fixed, X86_PMC_MAX_FIXED); |
703e937c | 1496 | } |
862a1a5f | 1497 | |
0933e5c6 RR |
1498 | perf_counter_mask |= |
1499 | ((1LL << x86_pmu.num_counters_fixed)-1) << X86_PMC_IDX_FIXED; | |
241771ef | 1500 | |
c323d95f | 1501 | perf_counters_lapic_init(); |
241771ef | 1502 | register_die_notifier(&perf_counter_nmi_notifier); |
1123e3ad IM |
1503 | |
1504 | pr_info("... version: %d\n", x86_pmu.version); | |
1505 | pr_info("... bit width: %d\n", x86_pmu.counter_bits); | |
1506 | pr_info("... generic counters: %d\n", x86_pmu.num_counters); | |
1507 | pr_info("... value mask: %016Lx\n", x86_pmu.counter_mask); | |
1508 | pr_info("... max period: %016Lx\n", x86_pmu.max_period); | |
1509 | pr_info("... fixed-purpose counters: %d\n", x86_pmu.num_counters_fixed); | |
1510 | pr_info("... counter mask: %016Lx\n", perf_counter_mask); | |
241771ef | 1511 | } |
621a01ea | 1512 | |
bb775fc2 | 1513 | static inline void x86_pmu_read(struct perf_counter *counter) |
ee06094f IM |
1514 | { |
1515 | x86_perf_counter_update(counter, &counter->hw, counter->hw.idx); | |
1516 | } | |
1517 | ||
4aeb0b42 RR |
1518 | static const struct pmu pmu = { |
1519 | .enable = x86_pmu_enable, | |
1520 | .disable = x86_pmu_disable, | |
1521 | .read = x86_pmu_read, | |
a78ac325 | 1522 | .unthrottle = x86_pmu_unthrottle, |
621a01ea IM |
1523 | }; |
1524 | ||
4aeb0b42 | 1525 | const struct pmu *hw_perf_counter_init(struct perf_counter *counter) |
621a01ea IM |
1526 | { |
1527 | int err; | |
1528 | ||
1529 | err = __hw_perf_counter_init(counter); | |
1530 | if (err) | |
9ea98e19 | 1531 | return ERR_PTR(err); |
621a01ea | 1532 | |
4aeb0b42 | 1533 | return &pmu; |
621a01ea | 1534 | } |
d7d59fb3 PZ |
1535 | |
1536 | /* | |
1537 | * callchain support | |
1538 | */ | |
1539 | ||
1540 | static inline | |
1541 | void callchain_store(struct perf_callchain_entry *entry, unsigned long ip) | |
1542 | { | |
1543 | if (entry->nr < MAX_STACK_DEPTH) | |
1544 | entry->ip[entry->nr++] = ip; | |
1545 | } | |
1546 | ||
1547 | static DEFINE_PER_CPU(struct perf_callchain_entry, irq_entry); | |
1548 | static DEFINE_PER_CPU(struct perf_callchain_entry, nmi_entry); | |
1549 | ||
1550 | ||
1551 | static void | |
1552 | backtrace_warning_symbol(void *data, char *msg, unsigned long symbol) | |
1553 | { | |
1554 | /* Ignore warnings */ | |
1555 | } | |
1556 | ||
1557 | static void backtrace_warning(void *data, char *msg) | |
1558 | { | |
1559 | /* Ignore warnings */ | |
1560 | } | |
1561 | ||
1562 | static int backtrace_stack(void *data, char *name) | |
1563 | { | |
1564 | /* Don't bother with IRQ stacks for now */ | |
1565 | return -1; | |
1566 | } | |
1567 | ||
1568 | static void backtrace_address(void *data, unsigned long addr, int reliable) | |
1569 | { | |
1570 | struct perf_callchain_entry *entry = data; | |
1571 | ||
1572 | if (reliable) | |
1573 | callchain_store(entry, addr); | |
1574 | } | |
1575 | ||
1576 | static const struct stacktrace_ops backtrace_ops = { | |
1577 | .warning = backtrace_warning, | |
1578 | .warning_symbol = backtrace_warning_symbol, | |
1579 | .stack = backtrace_stack, | |
1580 | .address = backtrace_address, | |
1581 | }; | |
1582 | ||
1583 | static void | |
1584 | perf_callchain_kernel(struct pt_regs *regs, struct perf_callchain_entry *entry) | |
1585 | { | |
1586 | unsigned long bp; | |
1587 | char *stack; | |
5872bdb8 | 1588 | int nr = entry->nr; |
d7d59fb3 PZ |
1589 | |
1590 | callchain_store(entry, instruction_pointer(regs)); | |
1591 | ||
1592 | stack = ((char *)regs + sizeof(struct pt_regs)); | |
1593 | #ifdef CONFIG_FRAME_POINTER | |
1594 | bp = frame_pointer(regs); | |
1595 | #else | |
1596 | bp = 0; | |
1597 | #endif | |
1598 | ||
1599 | dump_trace(NULL, regs, (void *)stack, bp, &backtrace_ops, entry); | |
5872bdb8 PZ |
1600 | |
1601 | entry->kernel = entry->nr - nr; | |
d7d59fb3 PZ |
1602 | } |
1603 | ||
1604 | ||
1605 | struct stack_frame { | |
1606 | const void __user *next_fp; | |
1607 | unsigned long return_address; | |
1608 | }; | |
1609 | ||
1610 | static int copy_stack_frame(const void __user *fp, struct stack_frame *frame) | |
1611 | { | |
1612 | int ret; | |
1613 | ||
1614 | if (!access_ok(VERIFY_READ, fp, sizeof(*frame))) | |
1615 | return 0; | |
1616 | ||
1617 | ret = 1; | |
1618 | pagefault_disable(); | |
1619 | if (__copy_from_user_inatomic(frame, fp, sizeof(*frame))) | |
1620 | ret = 0; | |
1621 | pagefault_enable(); | |
1622 | ||
1623 | return ret; | |
1624 | } | |
1625 | ||
1626 | static void | |
1627 | perf_callchain_user(struct pt_regs *regs, struct perf_callchain_entry *entry) | |
1628 | { | |
1629 | struct stack_frame frame; | |
1630 | const void __user *fp; | |
5872bdb8 | 1631 | int nr = entry->nr; |
d7d59fb3 PZ |
1632 | |
1633 | regs = (struct pt_regs *)current->thread.sp0 - 1; | |
1634 | fp = (void __user *)regs->bp; | |
1635 | ||
1636 | callchain_store(entry, regs->ip); | |
1637 | ||
1638 | while (entry->nr < MAX_STACK_DEPTH) { | |
1639 | frame.next_fp = NULL; | |
1640 | frame.return_address = 0; | |
1641 | ||
1642 | if (!copy_stack_frame(fp, &frame)) | |
1643 | break; | |
1644 | ||
1645 | if ((unsigned long)fp < user_stack_pointer(regs)) | |
1646 | break; | |
1647 | ||
1648 | callchain_store(entry, frame.return_address); | |
1649 | fp = frame.next_fp; | |
1650 | } | |
5872bdb8 PZ |
1651 | |
1652 | entry->user = entry->nr - nr; | |
d7d59fb3 PZ |
1653 | } |
1654 | ||
1655 | static void | |
1656 | perf_do_callchain(struct pt_regs *regs, struct perf_callchain_entry *entry) | |
1657 | { | |
1658 | int is_user; | |
1659 | ||
1660 | if (!regs) | |
1661 | return; | |
1662 | ||
1663 | is_user = user_mode(regs); | |
1664 | ||
1665 | if (!current || current->pid == 0) | |
1666 | return; | |
1667 | ||
1668 | if (is_user && current->state != TASK_RUNNING) | |
1669 | return; | |
1670 | ||
1671 | if (!is_user) | |
1672 | perf_callchain_kernel(regs, entry); | |
1673 | ||
1674 | if (current->mm) | |
1675 | perf_callchain_user(regs, entry); | |
1676 | } | |
1677 | ||
1678 | struct perf_callchain_entry *perf_callchain(struct pt_regs *regs) | |
1679 | { | |
1680 | struct perf_callchain_entry *entry; | |
1681 | ||
1682 | if (in_nmi()) | |
1683 | entry = &__get_cpu_var(nmi_entry); | |
1684 | else | |
1685 | entry = &__get_cpu_var(irq_entry); | |
1686 | ||
1687 | entry->nr = 0; | |
5872bdb8 PZ |
1688 | entry->hv = 0; |
1689 | entry->kernel = 0; | |
1690 | entry->user = 0; | |
d7d59fb3 PZ |
1691 | |
1692 | perf_do_callchain(regs, entry); | |
1693 | ||
1694 | return entry; | |
1695 | } |