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cdd6c482 | 1 | /* Performance event support for sparc64. |
59abbd1e | 2 | * |
4f6dbe4a | 3 | * Copyright (C) 2009, 2010 David S. Miller <davem@davemloft.net> |
59abbd1e | 4 | * |
cdd6c482 | 5 | * This code is based almost entirely upon the x86 perf event |
59abbd1e DM |
6 | * code, which is: |
7 | * | |
8 | * Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de> | |
9 | * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar | |
10 | * Copyright (C) 2009 Jaswinder Singh Rajput | |
11 | * Copyright (C) 2009 Advanced Micro Devices, Inc., Robert Richter | |
12 | * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> | |
13 | */ | |
14 | ||
cdd6c482 | 15 | #include <linux/perf_event.h> |
59abbd1e | 16 | #include <linux/kprobes.h> |
667f0cee | 17 | #include <linux/ftrace.h> |
59abbd1e DM |
18 | #include <linux/kernel.h> |
19 | #include <linux/kdebug.h> | |
20 | #include <linux/mutex.h> | |
21 | ||
4f6dbe4a | 22 | #include <asm/stacktrace.h> |
59abbd1e | 23 | #include <asm/cpudata.h> |
c17af4dd | 24 | #include <linux/uaccess.h> |
60063497 | 25 | #include <linux/atomic.h> |
59abbd1e DM |
26 | #include <asm/nmi.h> |
27 | #include <asm/pcr.h> | |
d550bbd4 | 28 | #include <asm/cacheflush.h> |
59abbd1e | 29 | |
cb1b8209 | 30 | #include "kernel.h" |
4f6dbe4a DM |
31 | #include "kstack.h" |
32 | ||
bab96bda DM |
33 | /* Two classes of sparc64 chips currently exist. All of which have |
34 | * 32-bit counters which can generate overflow interrupts on the | |
35 | * transition from 0xffffffff to 0. | |
59abbd1e | 36 | * |
bab96bda DM |
37 | * All chips upto and including SPARC-T3 have two performance |
38 | * counters. The two 32-bit counters are accessed in one go using a | |
39 | * single 64-bit register. | |
59abbd1e | 40 | * |
bab96bda DM |
41 | * On these older chips both counters are controlled using a single |
42 | * control register. The only way to stop all sampling is to clear | |
43 | * all of the context (user, supervisor, hypervisor) sampling enable | |
44 | * bits. But these bits apply to both counters, thus the two counters | |
45 | * can't be enabled/disabled individually. | |
46 | * | |
47 | * Furthermore, the control register on these older chips have two | |
48 | * event fields, one for each of the two counters. It's thus nearly | |
49 | * impossible to have one counter going while keeping the other one | |
50 | * stopped. Therefore it is possible to get overflow interrupts for | |
51 | * counters not currently "in use" and that condition must be checked | |
52 | * in the overflow interrupt handler. | |
59abbd1e DM |
53 | * |
54 | * So we use a hack, in that we program inactive counters with the | |
55 | * "sw_count0" and "sw_count1" events. These count how many times | |
56 | * the instruction "sethi %hi(0xfc000), %g0" is executed. It's an | |
57 | * unusual way to encode a NOP and therefore will not trigger in | |
58 | * normal code. | |
bab96bda DM |
59 | * |
60 | * Starting with SPARC-T4 we have one control register per counter. | |
61 | * And the counters are stored in individual registers. The registers | |
62 | * for the counters are 64-bit but only a 32-bit counter is | |
63 | * implemented. The event selections on SPARC-T4 lack any | |
64 | * restrictions, therefore we can elide all of the complicated | |
65 | * conflict resolution code we have for SPARC-T3 and earlier chips. | |
59abbd1e DM |
66 | */ |
67 | ||
035ea28d DM |
68 | #define MAX_HWEVENTS 4 |
69 | #define MAX_PCRS 4 | |
59abbd1e DM |
70 | #define MAX_PERIOD ((1UL << 32) - 1) |
71 | ||
72 | #define PIC_UPPER_INDEX 0 | |
73 | #define PIC_LOWER_INDEX 1 | |
e7bef6b0 | 74 | #define PIC_NO_INDEX -1 |
59abbd1e | 75 | |
cdd6c482 | 76 | struct cpu_hw_events { |
e7bef6b0 DM |
77 | /* Number of events currently scheduled onto this cpu. |
78 | * This tells how many entries in the arrays below | |
79 | * are valid. | |
80 | */ | |
81 | int n_events; | |
82 | ||
83 | /* Number of new events added since the last hw_perf_disable(). | |
84 | * This works because the perf event layer always adds new | |
85 | * events inside of a perf_{disable,enable}() sequence. | |
86 | */ | |
87 | int n_added; | |
88 | ||
89 | /* Array of events current scheduled on this cpu. */ | |
90 | struct perf_event *event[MAX_HWEVENTS]; | |
91 | ||
92 | /* Array of encoded longs, specifying the %pcr register | |
93 | * encoding and the mask of PIC counters this even can | |
94 | * be scheduled on. See perf_event_encode() et al. | |
95 | */ | |
96 | unsigned long events[MAX_HWEVENTS]; | |
97 | ||
98 | /* The current counter index assigned to an event. When the | |
99 | * event hasn't been programmed into the cpu yet, this will | |
100 | * hold PIC_NO_INDEX. The event->hw.idx value tells us where | |
101 | * we ought to schedule the event. | |
102 | */ | |
103 | int current_idx[MAX_HWEVENTS]; | |
104 | ||
3f1a2097 DM |
105 | /* Software copy of %pcr register(s) on this cpu. */ |
106 | u64 pcr[MAX_HWEVENTS]; | |
e7bef6b0 DM |
107 | |
108 | /* Enabled/disable state. */ | |
d1751388 | 109 | int enabled; |
a13c3afd LM |
110 | |
111 | unsigned int group_flag; | |
59abbd1e | 112 | }; |
265c1ffa | 113 | static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events) = { .enabled = 1, }; |
59abbd1e | 114 | |
e7bef6b0 DM |
115 | /* An event map describes the characteristics of a performance |
116 | * counter event. In particular it gives the encoding as well as | |
117 | * a mask telling which counters the event can be measured on. | |
bab96bda DM |
118 | * |
119 | * The mask is unused on SPARC-T4 and later. | |
e7bef6b0 | 120 | */ |
59abbd1e DM |
121 | struct perf_event_map { |
122 | u16 encoding; | |
123 | u8 pic_mask; | |
124 | #define PIC_NONE 0x00 | |
125 | #define PIC_UPPER 0x01 | |
126 | #define PIC_LOWER 0x02 | |
127 | }; | |
128 | ||
e7bef6b0 | 129 | /* Encode a perf_event_map entry into a long. */ |
a72a8a5f DM |
130 | static unsigned long perf_event_encode(const struct perf_event_map *pmap) |
131 | { | |
132 | return ((unsigned long) pmap->encoding << 16) | pmap->pic_mask; | |
133 | } | |
134 | ||
e7bef6b0 DM |
135 | static u8 perf_event_get_msk(unsigned long val) |
136 | { | |
137 | return val & 0xff; | |
138 | } | |
139 | ||
140 | static u64 perf_event_get_enc(unsigned long val) | |
a72a8a5f | 141 | { |
e7bef6b0 | 142 | return val >> 16; |
a72a8a5f DM |
143 | } |
144 | ||
2ce4da2e DM |
145 | #define C(x) PERF_COUNT_HW_CACHE_##x |
146 | ||
147 | #define CACHE_OP_UNSUPPORTED 0xfffe | |
148 | #define CACHE_OP_NONSENSE 0xffff | |
149 | ||
150 | typedef struct perf_event_map cache_map_t | |
151 | [PERF_COUNT_HW_CACHE_MAX] | |
152 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
153 | [PERF_COUNT_HW_CACHE_RESULT_MAX]; | |
154 | ||
59abbd1e DM |
155 | struct sparc_pmu { |
156 | const struct perf_event_map *(*event_map)(int); | |
2ce4da2e | 157 | const cache_map_t *cache_map; |
59abbd1e | 158 | int max_events; |
5344303c DM |
159 | u32 (*read_pmc)(int); |
160 | void (*write_pmc)(int, u64); | |
59abbd1e DM |
161 | int upper_shift; |
162 | int lower_shift; | |
163 | int event_mask; | |
7ac2ed28 DM |
164 | int user_bit; |
165 | int priv_bit; | |
91b9286d | 166 | int hv_bit; |
496c07e3 | 167 | int irq_bit; |
660d1376 DM |
168 | int upper_nop; |
169 | int lower_nop; | |
b38e99f5 DM |
170 | unsigned int flags; |
171 | #define SPARC_PMU_ALL_EXCLUDES_SAME 0x00000001 | |
172 | #define SPARC_PMU_HAS_CONFLICTS 0x00000002 | |
59660495 | 173 | int max_hw_events; |
3f1a2097 DM |
174 | int num_pcrs; |
175 | int num_pic_regs; | |
59abbd1e DM |
176 | }; |
177 | ||
5344303c DM |
178 | static u32 sparc_default_read_pmc(int idx) |
179 | { | |
180 | u64 val; | |
181 | ||
182 | val = pcr_ops->read_pic(0); | |
183 | if (idx == PIC_UPPER_INDEX) | |
184 | val >>= 32; | |
185 | ||
186 | return val & 0xffffffff; | |
187 | } | |
188 | ||
189 | static void sparc_default_write_pmc(int idx, u64 val) | |
190 | { | |
191 | u64 shift, mask, pic; | |
192 | ||
193 | shift = 0; | |
194 | if (idx == PIC_UPPER_INDEX) | |
195 | shift = 32; | |
196 | ||
197 | mask = ((u64) 0xffffffff) << shift; | |
198 | val <<= shift; | |
199 | ||
200 | pic = pcr_ops->read_pic(0); | |
201 | pic &= ~mask; | |
202 | pic |= val; | |
203 | pcr_ops->write_pic(0, pic); | |
204 | } | |
205 | ||
28e8f9be | 206 | static const struct perf_event_map ultra3_perfmon_event_map[] = { |
59abbd1e DM |
207 | [PERF_COUNT_HW_CPU_CYCLES] = { 0x0000, PIC_UPPER | PIC_LOWER }, |
208 | [PERF_COUNT_HW_INSTRUCTIONS] = { 0x0001, PIC_UPPER | PIC_LOWER }, | |
209 | [PERF_COUNT_HW_CACHE_REFERENCES] = { 0x0009, PIC_LOWER }, | |
210 | [PERF_COUNT_HW_CACHE_MISSES] = { 0x0009, PIC_UPPER }, | |
211 | }; | |
212 | ||
28e8f9be | 213 | static const struct perf_event_map *ultra3_event_map(int event_id) |
59abbd1e | 214 | { |
28e8f9be | 215 | return &ultra3_perfmon_event_map[event_id]; |
59abbd1e DM |
216 | } |
217 | ||
28e8f9be | 218 | static const cache_map_t ultra3_cache_map = { |
2ce4da2e DM |
219 | [C(L1D)] = { |
220 | [C(OP_READ)] = { | |
221 | [C(RESULT_ACCESS)] = { 0x09, PIC_LOWER, }, | |
222 | [C(RESULT_MISS)] = { 0x09, PIC_UPPER, }, | |
223 | }, | |
224 | [C(OP_WRITE)] = { | |
225 | [C(RESULT_ACCESS)] = { 0x0a, PIC_LOWER }, | |
226 | [C(RESULT_MISS)] = { 0x0a, PIC_UPPER }, | |
227 | }, | |
228 | [C(OP_PREFETCH)] = { | |
229 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
230 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
231 | }, | |
232 | }, | |
233 | [C(L1I)] = { | |
234 | [C(OP_READ)] = { | |
235 | [C(RESULT_ACCESS)] = { 0x09, PIC_LOWER, }, | |
236 | [C(RESULT_MISS)] = { 0x09, PIC_UPPER, }, | |
237 | }, | |
238 | [ C(OP_WRITE) ] = { | |
239 | [ C(RESULT_ACCESS) ] = { CACHE_OP_NONSENSE }, | |
240 | [ C(RESULT_MISS) ] = { CACHE_OP_NONSENSE }, | |
241 | }, | |
242 | [ C(OP_PREFETCH) ] = { | |
243 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
244 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
245 | }, | |
246 | }, | |
247 | [C(LL)] = { | |
248 | [C(OP_READ)] = { | |
249 | [C(RESULT_ACCESS)] = { 0x0c, PIC_LOWER, }, | |
250 | [C(RESULT_MISS)] = { 0x0c, PIC_UPPER, }, | |
251 | }, | |
252 | [C(OP_WRITE)] = { | |
253 | [C(RESULT_ACCESS)] = { 0x0c, PIC_LOWER }, | |
254 | [C(RESULT_MISS)] = { 0x0c, PIC_UPPER }, | |
255 | }, | |
256 | [C(OP_PREFETCH)] = { | |
257 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
258 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
259 | }, | |
260 | }, | |
261 | [C(DTLB)] = { | |
262 | [C(OP_READ)] = { | |
263 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
264 | [C(RESULT_MISS)] = { 0x12, PIC_UPPER, }, | |
265 | }, | |
266 | [ C(OP_WRITE) ] = { | |
267 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
268 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
269 | }, | |
270 | [ C(OP_PREFETCH) ] = { | |
271 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
272 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
273 | }, | |
274 | }, | |
275 | [C(ITLB)] = { | |
276 | [C(OP_READ)] = { | |
277 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
278 | [C(RESULT_MISS)] = { 0x11, PIC_UPPER, }, | |
279 | }, | |
280 | [ C(OP_WRITE) ] = { | |
281 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
282 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
283 | }, | |
284 | [ C(OP_PREFETCH) ] = { | |
285 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
286 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
287 | }, | |
288 | }, | |
289 | [C(BPU)] = { | |
290 | [C(OP_READ)] = { | |
291 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
292 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
293 | }, | |
294 | [ C(OP_WRITE) ] = { | |
295 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
296 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
297 | }, | |
298 | [ C(OP_PREFETCH) ] = { | |
299 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
300 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
301 | }, | |
302 | }, | |
89d6c0b5 PZ |
303 | [C(NODE)] = { |
304 | [C(OP_READ)] = { | |
305 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
306 | [C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
307 | }, | |
308 | [ C(OP_WRITE) ] = { | |
309 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
310 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
311 | }, | |
312 | [ C(OP_PREFETCH) ] = { | |
313 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
314 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
315 | }, | |
316 | }, | |
2ce4da2e DM |
317 | }; |
318 | ||
28e8f9be DM |
319 | static const struct sparc_pmu ultra3_pmu = { |
320 | .event_map = ultra3_event_map, | |
321 | .cache_map = &ultra3_cache_map, | |
322 | .max_events = ARRAY_SIZE(ultra3_perfmon_event_map), | |
5344303c DM |
323 | .read_pmc = sparc_default_read_pmc, |
324 | .write_pmc = sparc_default_write_pmc, | |
59abbd1e DM |
325 | .upper_shift = 11, |
326 | .lower_shift = 4, | |
327 | .event_mask = 0x3f, | |
7ac2ed28 DM |
328 | .user_bit = PCR_UTRACE, |
329 | .priv_bit = PCR_STRACE, | |
660d1376 DM |
330 | .upper_nop = 0x1c, |
331 | .lower_nop = 0x14, | |
b38e99f5 DM |
332 | .flags = (SPARC_PMU_ALL_EXCLUDES_SAME | |
333 | SPARC_PMU_HAS_CONFLICTS), | |
59660495 | 334 | .max_hw_events = 2, |
3f1a2097 DM |
335 | .num_pcrs = 1, |
336 | .num_pic_regs = 1, | |
59abbd1e DM |
337 | }; |
338 | ||
7eebda60 DM |
339 | /* Niagara1 is very limited. The upper PIC is hard-locked to count |
340 | * only instructions, so it is free running which creates all kinds of | |
6e804251 | 341 | * problems. Some hardware designs make one wonder if the creator |
7eebda60 DM |
342 | * even looked at how this stuff gets used by software. |
343 | */ | |
344 | static const struct perf_event_map niagara1_perfmon_event_map[] = { | |
345 | [PERF_COUNT_HW_CPU_CYCLES] = { 0x00, PIC_UPPER }, | |
346 | [PERF_COUNT_HW_INSTRUCTIONS] = { 0x00, PIC_UPPER }, | |
347 | [PERF_COUNT_HW_CACHE_REFERENCES] = { 0, PIC_NONE }, | |
348 | [PERF_COUNT_HW_CACHE_MISSES] = { 0x03, PIC_LOWER }, | |
349 | }; | |
350 | ||
351 | static const struct perf_event_map *niagara1_event_map(int event_id) | |
352 | { | |
353 | return &niagara1_perfmon_event_map[event_id]; | |
354 | } | |
355 | ||
356 | static const cache_map_t niagara1_cache_map = { | |
357 | [C(L1D)] = { | |
358 | [C(OP_READ)] = { | |
359 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
360 | [C(RESULT_MISS)] = { 0x03, PIC_LOWER, }, | |
361 | }, | |
362 | [C(OP_WRITE)] = { | |
363 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
364 | [C(RESULT_MISS)] = { 0x03, PIC_LOWER, }, | |
365 | }, | |
366 | [C(OP_PREFETCH)] = { | |
367 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
368 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
369 | }, | |
370 | }, | |
371 | [C(L1I)] = { | |
372 | [C(OP_READ)] = { | |
373 | [C(RESULT_ACCESS)] = { 0x00, PIC_UPPER }, | |
374 | [C(RESULT_MISS)] = { 0x02, PIC_LOWER, }, | |
375 | }, | |
376 | [ C(OP_WRITE) ] = { | |
377 | [ C(RESULT_ACCESS) ] = { CACHE_OP_NONSENSE }, | |
378 | [ C(RESULT_MISS) ] = { CACHE_OP_NONSENSE }, | |
379 | }, | |
380 | [ C(OP_PREFETCH) ] = { | |
381 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
382 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
383 | }, | |
384 | }, | |
385 | [C(LL)] = { | |
386 | [C(OP_READ)] = { | |
387 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
388 | [C(RESULT_MISS)] = { 0x07, PIC_LOWER, }, | |
389 | }, | |
390 | [C(OP_WRITE)] = { | |
391 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
392 | [C(RESULT_MISS)] = { 0x07, PIC_LOWER, }, | |
393 | }, | |
394 | [C(OP_PREFETCH)] = { | |
395 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
396 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
397 | }, | |
398 | }, | |
399 | [C(DTLB)] = { | |
400 | [C(OP_READ)] = { | |
401 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
402 | [C(RESULT_MISS)] = { 0x05, PIC_LOWER, }, | |
403 | }, | |
404 | [ C(OP_WRITE) ] = { | |
405 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
406 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
407 | }, | |
408 | [ C(OP_PREFETCH) ] = { | |
409 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
410 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
411 | }, | |
412 | }, | |
413 | [C(ITLB)] = { | |
414 | [C(OP_READ)] = { | |
415 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
416 | [C(RESULT_MISS)] = { 0x04, PIC_LOWER, }, | |
417 | }, | |
418 | [ C(OP_WRITE) ] = { | |
419 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
420 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
421 | }, | |
422 | [ C(OP_PREFETCH) ] = { | |
423 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
424 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
425 | }, | |
426 | }, | |
427 | [C(BPU)] = { | |
428 | [C(OP_READ)] = { | |
429 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
430 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
431 | }, | |
432 | [ C(OP_WRITE) ] = { | |
433 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
434 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
435 | }, | |
436 | [ C(OP_PREFETCH) ] = { | |
437 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
438 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
439 | }, | |
440 | }, | |
89d6c0b5 PZ |
441 | [C(NODE)] = { |
442 | [C(OP_READ)] = { | |
443 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
444 | [C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
445 | }, | |
446 | [ C(OP_WRITE) ] = { | |
447 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
448 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
449 | }, | |
450 | [ C(OP_PREFETCH) ] = { | |
451 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
452 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
453 | }, | |
454 | }, | |
7eebda60 DM |
455 | }; |
456 | ||
457 | static const struct sparc_pmu niagara1_pmu = { | |
458 | .event_map = niagara1_event_map, | |
459 | .cache_map = &niagara1_cache_map, | |
460 | .max_events = ARRAY_SIZE(niagara1_perfmon_event_map), | |
5344303c DM |
461 | .read_pmc = sparc_default_read_pmc, |
462 | .write_pmc = sparc_default_write_pmc, | |
7eebda60 DM |
463 | .upper_shift = 0, |
464 | .lower_shift = 4, | |
465 | .event_mask = 0x7, | |
7ac2ed28 DM |
466 | .user_bit = PCR_UTRACE, |
467 | .priv_bit = PCR_STRACE, | |
7eebda60 DM |
468 | .upper_nop = 0x0, |
469 | .lower_nop = 0x0, | |
b38e99f5 DM |
470 | .flags = (SPARC_PMU_ALL_EXCLUDES_SAME | |
471 | SPARC_PMU_HAS_CONFLICTS), | |
59660495 | 472 | .max_hw_events = 2, |
3f1a2097 DM |
473 | .num_pcrs = 1, |
474 | .num_pic_regs = 1, | |
7eebda60 DM |
475 | }; |
476 | ||
b73d8847 DM |
477 | static const struct perf_event_map niagara2_perfmon_event_map[] = { |
478 | [PERF_COUNT_HW_CPU_CYCLES] = { 0x02ff, PIC_UPPER | PIC_LOWER }, | |
479 | [PERF_COUNT_HW_INSTRUCTIONS] = { 0x02ff, PIC_UPPER | PIC_LOWER }, | |
480 | [PERF_COUNT_HW_CACHE_REFERENCES] = { 0x0208, PIC_UPPER | PIC_LOWER }, | |
481 | [PERF_COUNT_HW_CACHE_MISSES] = { 0x0302, PIC_UPPER | PIC_LOWER }, | |
482 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 0x0201, PIC_UPPER | PIC_LOWER }, | |
483 | [PERF_COUNT_HW_BRANCH_MISSES] = { 0x0202, PIC_UPPER | PIC_LOWER }, | |
484 | }; | |
485 | ||
cdd6c482 | 486 | static const struct perf_event_map *niagara2_event_map(int event_id) |
b73d8847 | 487 | { |
cdd6c482 | 488 | return &niagara2_perfmon_event_map[event_id]; |
b73d8847 DM |
489 | } |
490 | ||
d0b86480 DM |
491 | static const cache_map_t niagara2_cache_map = { |
492 | [C(L1D)] = { | |
493 | [C(OP_READ)] = { | |
494 | [C(RESULT_ACCESS)] = { 0x0208, PIC_UPPER | PIC_LOWER, }, | |
495 | [C(RESULT_MISS)] = { 0x0302, PIC_UPPER | PIC_LOWER, }, | |
496 | }, | |
497 | [C(OP_WRITE)] = { | |
498 | [C(RESULT_ACCESS)] = { 0x0210, PIC_UPPER | PIC_LOWER, }, | |
499 | [C(RESULT_MISS)] = { 0x0302, PIC_UPPER | PIC_LOWER, }, | |
500 | }, | |
501 | [C(OP_PREFETCH)] = { | |
502 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
503 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
504 | }, | |
505 | }, | |
506 | [C(L1I)] = { | |
507 | [C(OP_READ)] = { | |
508 | [C(RESULT_ACCESS)] = { 0x02ff, PIC_UPPER | PIC_LOWER, }, | |
509 | [C(RESULT_MISS)] = { 0x0301, PIC_UPPER | PIC_LOWER, }, | |
510 | }, | |
511 | [ C(OP_WRITE) ] = { | |
512 | [ C(RESULT_ACCESS) ] = { CACHE_OP_NONSENSE }, | |
513 | [ C(RESULT_MISS) ] = { CACHE_OP_NONSENSE }, | |
514 | }, | |
515 | [ C(OP_PREFETCH) ] = { | |
516 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
517 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
518 | }, | |
519 | }, | |
520 | [C(LL)] = { | |
521 | [C(OP_READ)] = { | |
522 | [C(RESULT_ACCESS)] = { 0x0208, PIC_UPPER | PIC_LOWER, }, | |
523 | [C(RESULT_MISS)] = { 0x0330, PIC_UPPER | PIC_LOWER, }, | |
524 | }, | |
525 | [C(OP_WRITE)] = { | |
526 | [C(RESULT_ACCESS)] = { 0x0210, PIC_UPPER | PIC_LOWER, }, | |
527 | [C(RESULT_MISS)] = { 0x0320, PIC_UPPER | PIC_LOWER, }, | |
528 | }, | |
529 | [C(OP_PREFETCH)] = { | |
530 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
531 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
532 | }, | |
533 | }, | |
534 | [C(DTLB)] = { | |
535 | [C(OP_READ)] = { | |
536 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
537 | [C(RESULT_MISS)] = { 0x0b08, PIC_UPPER | PIC_LOWER, }, | |
538 | }, | |
539 | [ C(OP_WRITE) ] = { | |
540 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
541 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
542 | }, | |
543 | [ C(OP_PREFETCH) ] = { | |
544 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
545 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
546 | }, | |
547 | }, | |
548 | [C(ITLB)] = { | |
549 | [C(OP_READ)] = { | |
550 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
551 | [C(RESULT_MISS)] = { 0xb04, PIC_UPPER | PIC_LOWER, }, | |
552 | }, | |
553 | [ C(OP_WRITE) ] = { | |
554 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
555 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
556 | }, | |
557 | [ C(OP_PREFETCH) ] = { | |
558 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
559 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
560 | }, | |
561 | }, | |
562 | [C(BPU)] = { | |
563 | [C(OP_READ)] = { | |
564 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
565 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
566 | }, | |
567 | [ C(OP_WRITE) ] = { | |
568 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
89d6c0b5 PZ |
569 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, |
570 | }, | |
571 | [ C(OP_PREFETCH) ] = { | |
572 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
573 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
574 | }, | |
575 | }, | |
576 | [C(NODE)] = { | |
577 | [C(OP_READ)] = { | |
578 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
579 | [C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
580 | }, | |
581 | [ C(OP_WRITE) ] = { | |
582 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
d0b86480 DM |
583 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, |
584 | }, | |
585 | [ C(OP_PREFETCH) ] = { | |
586 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
587 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
588 | }, | |
589 | }, | |
590 | }; | |
591 | ||
b73d8847 DM |
592 | static const struct sparc_pmu niagara2_pmu = { |
593 | .event_map = niagara2_event_map, | |
d0b86480 | 594 | .cache_map = &niagara2_cache_map, |
b73d8847 | 595 | .max_events = ARRAY_SIZE(niagara2_perfmon_event_map), |
5344303c DM |
596 | .read_pmc = sparc_default_read_pmc, |
597 | .write_pmc = sparc_default_write_pmc, | |
b73d8847 DM |
598 | .upper_shift = 19, |
599 | .lower_shift = 6, | |
600 | .event_mask = 0xfff, | |
7ac2ed28 DM |
601 | .user_bit = PCR_UTRACE, |
602 | .priv_bit = PCR_STRACE, | |
603 | .hv_bit = PCR_N2_HTRACE, | |
de23cf3c | 604 | .irq_bit = 0x30, |
b73d8847 DM |
605 | .upper_nop = 0x220, |
606 | .lower_nop = 0x220, | |
b38e99f5 DM |
607 | .flags = (SPARC_PMU_ALL_EXCLUDES_SAME | |
608 | SPARC_PMU_HAS_CONFLICTS), | |
59660495 | 609 | .max_hw_events = 2, |
3f1a2097 DM |
610 | .num_pcrs = 1, |
611 | .num_pic_regs = 1, | |
b73d8847 DM |
612 | }; |
613 | ||
035ea28d DM |
614 | static const struct perf_event_map niagara4_perfmon_event_map[] = { |
615 | [PERF_COUNT_HW_CPU_CYCLES] = { (26 << 6) }, | |
616 | [PERF_COUNT_HW_INSTRUCTIONS] = { (3 << 6) | 0x3f }, | |
617 | [PERF_COUNT_HW_CACHE_REFERENCES] = { (3 << 6) | 0x04 }, | |
618 | [PERF_COUNT_HW_CACHE_MISSES] = { (16 << 6) | 0x07 }, | |
619 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { (4 << 6) | 0x01 }, | |
620 | [PERF_COUNT_HW_BRANCH_MISSES] = { (25 << 6) | 0x0f }, | |
621 | }; | |
622 | ||
623 | static const struct perf_event_map *niagara4_event_map(int event_id) | |
624 | { | |
625 | return &niagara4_perfmon_event_map[event_id]; | |
626 | } | |
627 | ||
628 | static const cache_map_t niagara4_cache_map = { | |
629 | [C(L1D)] = { | |
630 | [C(OP_READ)] = { | |
631 | [C(RESULT_ACCESS)] = { (3 << 6) | 0x04 }, | |
632 | [C(RESULT_MISS)] = { (16 << 6) | 0x07 }, | |
633 | }, | |
634 | [C(OP_WRITE)] = { | |
635 | [C(RESULT_ACCESS)] = { (3 << 6) | 0x08 }, | |
636 | [C(RESULT_MISS)] = { (16 << 6) | 0x07 }, | |
637 | }, | |
638 | [C(OP_PREFETCH)] = { | |
639 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
640 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
641 | }, | |
642 | }, | |
643 | [C(L1I)] = { | |
644 | [C(OP_READ)] = { | |
645 | [C(RESULT_ACCESS)] = { (3 << 6) | 0x3f }, | |
646 | [C(RESULT_MISS)] = { (11 << 6) | 0x03 }, | |
647 | }, | |
648 | [ C(OP_WRITE) ] = { | |
649 | [ C(RESULT_ACCESS) ] = { CACHE_OP_NONSENSE }, | |
650 | [ C(RESULT_MISS) ] = { CACHE_OP_NONSENSE }, | |
651 | }, | |
652 | [ C(OP_PREFETCH) ] = { | |
653 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
654 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
655 | }, | |
656 | }, | |
657 | [C(LL)] = { | |
658 | [C(OP_READ)] = { | |
659 | [C(RESULT_ACCESS)] = { (3 << 6) | 0x04 }, | |
660 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
661 | }, | |
662 | [C(OP_WRITE)] = { | |
663 | [C(RESULT_ACCESS)] = { (3 << 6) | 0x08 }, | |
664 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
665 | }, | |
666 | [C(OP_PREFETCH)] = { | |
667 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
668 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
669 | }, | |
670 | }, | |
671 | [C(DTLB)] = { | |
672 | [C(OP_READ)] = { | |
673 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
674 | [C(RESULT_MISS)] = { (17 << 6) | 0x3f }, | |
675 | }, | |
676 | [ C(OP_WRITE) ] = { | |
677 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
678 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
679 | }, | |
680 | [ C(OP_PREFETCH) ] = { | |
681 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
682 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
683 | }, | |
684 | }, | |
685 | [C(ITLB)] = { | |
686 | [C(OP_READ)] = { | |
687 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
688 | [C(RESULT_MISS)] = { (6 << 6) | 0x3f }, | |
689 | }, | |
690 | [ C(OP_WRITE) ] = { | |
691 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
692 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
693 | }, | |
694 | [ C(OP_PREFETCH) ] = { | |
695 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
696 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
697 | }, | |
698 | }, | |
699 | [C(BPU)] = { | |
700 | [C(OP_READ)] = { | |
701 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
702 | [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED }, | |
703 | }, | |
704 | [ C(OP_WRITE) ] = { | |
705 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
706 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
707 | }, | |
708 | [ C(OP_PREFETCH) ] = { | |
709 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
710 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
711 | }, | |
712 | }, | |
713 | [C(NODE)] = { | |
714 | [C(OP_READ)] = { | |
715 | [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED }, | |
716 | [C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
717 | }, | |
718 | [ C(OP_WRITE) ] = { | |
719 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
720 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
721 | }, | |
722 | [ C(OP_PREFETCH) ] = { | |
723 | [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED }, | |
724 | [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED }, | |
725 | }, | |
726 | }, | |
727 | }; | |
728 | ||
729 | static u32 sparc_vt_read_pmc(int idx) | |
730 | { | |
731 | u64 val = pcr_ops->read_pic(idx); | |
732 | ||
733 | return val & 0xffffffff; | |
734 | } | |
735 | ||
736 | static void sparc_vt_write_pmc(int idx, u64 val) | |
737 | { | |
738 | u64 pcr; | |
739 | ||
035ea28d | 740 | pcr = pcr_ops->read_pcr(idx); |
df386375 DM |
741 | /* ensure ov and ntc are reset */ |
742 | pcr &= ~(PCR_N4_OV | PCR_N4_NTC); | |
035ea28d DM |
743 | |
744 | pcr_ops->write_pic(idx, val & 0xffffffff); | |
745 | ||
746 | pcr_ops->write_pcr(idx, pcr); | |
747 | } | |
748 | ||
749 | static const struct sparc_pmu niagara4_pmu = { | |
750 | .event_map = niagara4_event_map, | |
751 | .cache_map = &niagara4_cache_map, | |
752 | .max_events = ARRAY_SIZE(niagara4_perfmon_event_map), | |
753 | .read_pmc = sparc_vt_read_pmc, | |
754 | .write_pmc = sparc_vt_write_pmc, | |
755 | .upper_shift = 5, | |
756 | .lower_shift = 5, | |
757 | .event_mask = 0x7ff, | |
758 | .user_bit = PCR_N4_UTRACE, | |
759 | .priv_bit = PCR_N4_STRACE, | |
760 | ||
761 | /* We explicitly don't support hypervisor tracing. The T4 | |
762 | * generates the overflow event for precise events via a trap | |
763 | * which will not be generated (ie. it's completely lost) if | |
764 | * we happen to be in the hypervisor when the event triggers. | |
765 | * Essentially, the overflow event reporting is completely | |
766 | * unusable when you have hypervisor mode tracing enabled. | |
767 | */ | |
768 | .hv_bit = 0, | |
769 | ||
770 | .irq_bit = PCR_N4_TOE, | |
771 | .upper_nop = 0, | |
772 | .lower_nop = 0, | |
773 | .flags = 0, | |
774 | .max_hw_events = 4, | |
775 | .num_pcrs = 4, | |
776 | .num_pic_regs = 4, | |
777 | }; | |
778 | ||
b5aff55d DA |
779 | static const struct sparc_pmu sparc_m7_pmu = { |
780 | .event_map = niagara4_event_map, | |
781 | .cache_map = &niagara4_cache_map, | |
782 | .max_events = ARRAY_SIZE(niagara4_perfmon_event_map), | |
783 | .read_pmc = sparc_vt_read_pmc, | |
df386375 | 784 | .write_pmc = sparc_vt_write_pmc, |
b5aff55d DA |
785 | .upper_shift = 5, |
786 | .lower_shift = 5, | |
787 | .event_mask = 0x7ff, | |
788 | .user_bit = PCR_N4_UTRACE, | |
789 | .priv_bit = PCR_N4_STRACE, | |
790 | ||
791 | /* We explicitly don't support hypervisor tracing. */ | |
792 | .hv_bit = 0, | |
793 | ||
794 | .irq_bit = PCR_N4_TOE, | |
795 | .upper_nop = 0, | |
796 | .lower_nop = 0, | |
797 | .flags = 0, | |
798 | .max_hw_events = 4, | |
799 | .num_pcrs = 4, | |
800 | .num_pic_regs = 4, | |
801 | }; | |
59abbd1e DM |
802 | static const struct sparc_pmu *sparc_pmu __read_mostly; |
803 | ||
cdd6c482 | 804 | static u64 event_encoding(u64 event_id, int idx) |
59abbd1e DM |
805 | { |
806 | if (idx == PIC_UPPER_INDEX) | |
cdd6c482 | 807 | event_id <<= sparc_pmu->upper_shift; |
59abbd1e | 808 | else |
cdd6c482 IM |
809 | event_id <<= sparc_pmu->lower_shift; |
810 | return event_id; | |
59abbd1e DM |
811 | } |
812 | ||
813 | static u64 mask_for_index(int idx) | |
814 | { | |
815 | return event_encoding(sparc_pmu->event_mask, idx); | |
816 | } | |
817 | ||
818 | static u64 nop_for_index(int idx) | |
819 | { | |
820 | return event_encoding(idx == PIC_UPPER_INDEX ? | |
660d1376 DM |
821 | sparc_pmu->upper_nop : |
822 | sparc_pmu->lower_nop, idx); | |
59abbd1e DM |
823 | } |
824 | ||
d1751388 | 825 | static inline void sparc_pmu_enable_event(struct cpu_hw_events *cpuc, struct hw_perf_event *hwc, int idx) |
59abbd1e | 826 | { |
e793d8c6 | 827 | u64 enc, val, mask = mask_for_index(idx); |
b4f061a4 | 828 | int pcr_index = 0; |
59abbd1e | 829 | |
b4f061a4 DM |
830 | if (sparc_pmu->num_pcrs > 1) |
831 | pcr_index = idx; | |
832 | ||
e793d8c6 DM |
833 | enc = perf_event_get_enc(cpuc->events[idx]); |
834 | ||
b4f061a4 | 835 | val = cpuc->pcr[pcr_index]; |
d1751388 | 836 | val &= ~mask; |
e793d8c6 | 837 | val |= event_encoding(enc, idx); |
b4f061a4 | 838 | cpuc->pcr[pcr_index] = val; |
d1751388 | 839 | |
b4f061a4 | 840 | pcr_ops->write_pcr(pcr_index, cpuc->pcr[pcr_index]); |
59abbd1e DM |
841 | } |
842 | ||
d1751388 | 843 | static inline void sparc_pmu_disable_event(struct cpu_hw_events *cpuc, struct hw_perf_event *hwc, int idx) |
59abbd1e DM |
844 | { |
845 | u64 mask = mask_for_index(idx); | |
846 | u64 nop = nop_for_index(idx); | |
b4f061a4 | 847 | int pcr_index = 0; |
d1751388 | 848 | u64 val; |
59abbd1e | 849 | |
b4f061a4 DM |
850 | if (sparc_pmu->num_pcrs > 1) |
851 | pcr_index = idx; | |
852 | ||
853 | val = cpuc->pcr[pcr_index]; | |
d1751388 DM |
854 | val &= ~mask; |
855 | val |= nop; | |
b4f061a4 | 856 | cpuc->pcr[pcr_index] = val; |
d1751388 | 857 | |
b4f061a4 | 858 | pcr_ops->write_pcr(pcr_index, cpuc->pcr[pcr_index]); |
59abbd1e DM |
859 | } |
860 | ||
e7bef6b0 DM |
861 | static u64 sparc_perf_event_update(struct perf_event *event, |
862 | struct hw_perf_event *hwc, int idx) | |
863 | { | |
864 | int shift = 64 - 32; | |
865 | u64 prev_raw_count, new_raw_count; | |
866 | s64 delta; | |
867 | ||
868 | again: | |
e7850595 | 869 | prev_raw_count = local64_read(&hwc->prev_count); |
5344303c | 870 | new_raw_count = sparc_pmu->read_pmc(idx); |
e7bef6b0 | 871 | |
e7850595 | 872 | if (local64_cmpxchg(&hwc->prev_count, prev_raw_count, |
e7bef6b0 DM |
873 | new_raw_count) != prev_raw_count) |
874 | goto again; | |
875 | ||
876 | delta = (new_raw_count << shift) - (prev_raw_count << shift); | |
877 | delta >>= shift; | |
878 | ||
e7850595 PZ |
879 | local64_add(delta, &event->count); |
880 | local64_sub(delta, &hwc->period_left); | |
e7bef6b0 DM |
881 | |
882 | return new_raw_count; | |
883 | } | |
884 | ||
cdd6c482 | 885 | static int sparc_perf_event_set_period(struct perf_event *event, |
d29862f0 | 886 | struct hw_perf_event *hwc, int idx) |
59abbd1e | 887 | { |
e7850595 | 888 | s64 left = local64_read(&hwc->period_left); |
59abbd1e DM |
889 | s64 period = hwc->sample_period; |
890 | int ret = 0; | |
891 | ||
892 | if (unlikely(left <= -period)) { | |
893 | left = period; | |
e7850595 | 894 | local64_set(&hwc->period_left, left); |
59abbd1e DM |
895 | hwc->last_period = period; |
896 | ret = 1; | |
897 | } | |
898 | ||
899 | if (unlikely(left <= 0)) { | |
900 | left += period; | |
e7850595 | 901 | local64_set(&hwc->period_left, left); |
59abbd1e DM |
902 | hwc->last_period = period; |
903 | ret = 1; | |
904 | } | |
905 | if (left > MAX_PERIOD) | |
906 | left = MAX_PERIOD; | |
907 | ||
e7850595 | 908 | local64_set(&hwc->prev_count, (u64)-left); |
59abbd1e | 909 | |
5344303c | 910 | sparc_pmu->write_pmc(idx, (u64)(-left) & 0xffffffff); |
59abbd1e | 911 | |
cdd6c482 | 912 | perf_event_update_userpage(event); |
59abbd1e DM |
913 | |
914 | return ret; | |
915 | } | |
916 | ||
7a37a0b8 | 917 | static void read_in_all_counters(struct cpu_hw_events *cpuc) |
59abbd1e | 918 | { |
e7bef6b0 | 919 | int i; |
59abbd1e | 920 | |
e7bef6b0 DM |
921 | for (i = 0; i < cpuc->n_events; i++) { |
922 | struct perf_event *cp = cpuc->event[i]; | |
59abbd1e | 923 | |
e7bef6b0 DM |
924 | if (cpuc->current_idx[i] != PIC_NO_INDEX && |
925 | cpuc->current_idx[i] != cp->hw.idx) { | |
926 | sparc_perf_event_update(cp, &cp->hw, | |
927 | cpuc->current_idx[i]); | |
928 | cpuc->current_idx[i] = PIC_NO_INDEX; | |
929 | } | |
930 | } | |
7a37a0b8 DM |
931 | } |
932 | ||
933 | /* On this PMU all PICs are programmed using a single PCR. Calculate | |
934 | * the combined control register value. | |
935 | * | |
936 | * For such chips we require that all of the events have the same | |
937 | * configuration, so just fetch the settings from the first entry. | |
938 | */ | |
939 | static void calculate_single_pcr(struct cpu_hw_events *cpuc) | |
940 | { | |
941 | int i; | |
942 | ||
943 | if (!cpuc->n_added) | |
944 | goto out; | |
59abbd1e | 945 | |
e7bef6b0 DM |
946 | /* Assign to counters all unassigned events. */ |
947 | for (i = 0; i < cpuc->n_events; i++) { | |
948 | struct perf_event *cp = cpuc->event[i]; | |
949 | struct hw_perf_event *hwc = &cp->hw; | |
950 | int idx = hwc->idx; | |
951 | u64 enc; | |
952 | ||
953 | if (cpuc->current_idx[i] != PIC_NO_INDEX) | |
954 | continue; | |
955 | ||
956 | sparc_perf_event_set_period(cp, hwc, idx); | |
957 | cpuc->current_idx[i] = idx; | |
958 | ||
959 | enc = perf_event_get_enc(cpuc->events[i]); | |
7a37a0b8 | 960 | cpuc->pcr[0] &= ~mask_for_index(idx); |
a4eaf7f1 | 961 | if (hwc->state & PERF_HES_STOPPED) |
7a37a0b8 | 962 | cpuc->pcr[0] |= nop_for_index(idx); |
a4eaf7f1 | 963 | else |
7a37a0b8 | 964 | cpuc->pcr[0] |= event_encoding(enc, idx); |
e7bef6b0 DM |
965 | } |
966 | out: | |
7a37a0b8 DM |
967 | cpuc->pcr[0] |= cpuc->event[0]->hw.config_base; |
968 | } | |
969 | ||
d51291cb DA |
970 | static void sparc_pmu_start(struct perf_event *event, int flags); |
971 | ||
7a37a0b8 DM |
972 | /* On this PMU each PIC has it's own PCR control register. */ |
973 | static void calculate_multiple_pcrs(struct cpu_hw_events *cpuc) | |
974 | { | |
975 | int i; | |
976 | ||
977 | if (!cpuc->n_added) | |
978 | goto out; | |
979 | ||
980 | for (i = 0; i < cpuc->n_events; i++) { | |
981 | struct perf_event *cp = cpuc->event[i]; | |
982 | struct hw_perf_event *hwc = &cp->hw; | |
983 | int idx = hwc->idx; | |
7a37a0b8 DM |
984 | |
985 | if (cpuc->current_idx[i] != PIC_NO_INDEX) | |
986 | continue; | |
987 | ||
7a37a0b8 DM |
988 | cpuc->current_idx[i] = idx; |
989 | ||
d51291cb | 990 | sparc_pmu_start(cp, PERF_EF_RELOAD); |
7a37a0b8 DM |
991 | } |
992 | out: | |
993 | for (i = 0; i < cpuc->n_events; i++) { | |
994 | struct perf_event *cp = cpuc->event[i]; | |
995 | int idx = cp->hw.idx; | |
996 | ||
997 | cpuc->pcr[idx] |= cp->hw.config_base; | |
998 | } | |
999 | } | |
1000 | ||
1001 | /* If performance event entries have been added, move existing events | |
1002 | * around (if necessary) and then assign new entries to counters. | |
1003 | */ | |
1004 | static void update_pcrs_for_enable(struct cpu_hw_events *cpuc) | |
1005 | { | |
1006 | if (cpuc->n_added) | |
1007 | read_in_all_counters(cpuc); | |
1008 | ||
1009 | if (sparc_pmu->num_pcrs == 1) { | |
1010 | calculate_single_pcr(cpuc); | |
1011 | } else { | |
1012 | calculate_multiple_pcrs(cpuc); | |
1013 | } | |
59abbd1e DM |
1014 | } |
1015 | ||
a4eaf7f1 | 1016 | static void sparc_pmu_enable(struct pmu *pmu) |
59abbd1e | 1017 | { |
494fc421 | 1018 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
7a37a0b8 | 1019 | int i; |
59abbd1e | 1020 | |
e7bef6b0 DM |
1021 | if (cpuc->enabled) |
1022 | return; | |
59abbd1e | 1023 | |
e7bef6b0 DM |
1024 | cpuc->enabled = 1; |
1025 | barrier(); | |
59abbd1e | 1026 | |
7a37a0b8 DM |
1027 | if (cpuc->n_events) |
1028 | update_pcrs_for_enable(cpuc); | |
59abbd1e | 1029 | |
7a37a0b8 DM |
1030 | for (i = 0; i < sparc_pmu->num_pcrs; i++) |
1031 | pcr_ops->write_pcr(i, cpuc->pcr[i]); | |
e7bef6b0 DM |
1032 | } |
1033 | ||
a4eaf7f1 | 1034 | static void sparc_pmu_disable(struct pmu *pmu) |
e7bef6b0 | 1035 | { |
494fc421 | 1036 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
3f1a2097 | 1037 | int i; |
e7bef6b0 DM |
1038 | |
1039 | if (!cpuc->enabled) | |
1040 | return; | |
1041 | ||
1042 | cpuc->enabled = 0; | |
1043 | cpuc->n_added = 0; | |
1044 | ||
3f1a2097 DM |
1045 | for (i = 0; i < sparc_pmu->num_pcrs; i++) { |
1046 | u64 val = cpuc->pcr[i]; | |
e7bef6b0 | 1047 | |
3f1a2097 DM |
1048 | val &= ~(sparc_pmu->user_bit | sparc_pmu->priv_bit | |
1049 | sparc_pmu->hv_bit | sparc_pmu->irq_bit); | |
1050 | cpuc->pcr[i] = val; | |
1051 | pcr_ops->write_pcr(i, cpuc->pcr[i]); | |
1052 | } | |
59abbd1e DM |
1053 | } |
1054 | ||
a4eaf7f1 PZ |
1055 | static int active_event_index(struct cpu_hw_events *cpuc, |
1056 | struct perf_event *event) | |
1057 | { | |
1058 | int i; | |
1059 | ||
1060 | for (i = 0; i < cpuc->n_events; i++) { | |
1061 | if (cpuc->event[i] == event) | |
1062 | break; | |
1063 | } | |
1064 | BUG_ON(i == cpuc->n_events); | |
1065 | return cpuc->current_idx[i]; | |
1066 | } | |
1067 | ||
1068 | static void sparc_pmu_start(struct perf_event *event, int flags) | |
1069 | { | |
494fc421 | 1070 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
a4eaf7f1 PZ |
1071 | int idx = active_event_index(cpuc, event); |
1072 | ||
1073 | if (flags & PERF_EF_RELOAD) { | |
1074 | WARN_ON_ONCE(!(event->hw.state & PERF_HES_UPTODATE)); | |
1075 | sparc_perf_event_set_period(event, &event->hw, idx); | |
1076 | } | |
1077 | ||
1078 | event->hw.state = 0; | |
1079 | ||
1080 | sparc_pmu_enable_event(cpuc, &event->hw, idx); | |
1081 | } | |
1082 | ||
1083 | static void sparc_pmu_stop(struct perf_event *event, int flags) | |
1084 | { | |
494fc421 | 1085 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
a4eaf7f1 PZ |
1086 | int idx = active_event_index(cpuc, event); |
1087 | ||
1088 | if (!(event->hw.state & PERF_HES_STOPPED)) { | |
1089 | sparc_pmu_disable_event(cpuc, &event->hw, idx); | |
1090 | event->hw.state |= PERF_HES_STOPPED; | |
1091 | } | |
1092 | ||
1093 | if (!(event->hw.state & PERF_HES_UPTODATE) && (flags & PERF_EF_UPDATE)) { | |
1094 | sparc_perf_event_update(event, &event->hw, idx); | |
1095 | event->hw.state |= PERF_HES_UPTODATE; | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | static void sparc_pmu_del(struct perf_event *event, int _flags) | |
59abbd1e | 1100 | { |
494fc421 | 1101 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
e7bef6b0 DM |
1102 | unsigned long flags; |
1103 | int i; | |
59abbd1e | 1104 | |
e7bef6b0 | 1105 | local_irq_save(flags); |
e7bef6b0 DM |
1106 | |
1107 | for (i = 0; i < cpuc->n_events; i++) { | |
1108 | if (event == cpuc->event[i]) { | |
a4eaf7f1 PZ |
1109 | /* Absorb the final count and turn off the |
1110 | * event. | |
1111 | */ | |
1112 | sparc_pmu_stop(event, PERF_EF_UPDATE); | |
e7bef6b0 DM |
1113 | |
1114 | /* Shift remaining entries down into | |
1115 | * the existing slot. | |
1116 | */ | |
1117 | while (++i < cpuc->n_events) { | |
1118 | cpuc->event[i - 1] = cpuc->event[i]; | |
1119 | cpuc->events[i - 1] = cpuc->events[i]; | |
1120 | cpuc->current_idx[i - 1] = | |
1121 | cpuc->current_idx[i]; | |
1122 | } | |
1123 | ||
e7bef6b0 | 1124 | perf_event_update_userpage(event); |
59abbd1e | 1125 | |
e7bef6b0 DM |
1126 | cpuc->n_events--; |
1127 | break; | |
1128 | } | |
1129 | } | |
59abbd1e | 1130 | |
e7bef6b0 DM |
1131 | local_irq_restore(flags); |
1132 | } | |
1133 | ||
cdd6c482 | 1134 | static void sparc_pmu_read(struct perf_event *event) |
59abbd1e | 1135 | { |
494fc421 | 1136 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
e7bef6b0 | 1137 | int idx = active_event_index(cpuc, event); |
cdd6c482 | 1138 | struct hw_perf_event *hwc = &event->hw; |
d1751388 | 1139 | |
e7bef6b0 | 1140 | sparc_perf_event_update(event, hwc, idx); |
59abbd1e DM |
1141 | } |
1142 | ||
cdd6c482 | 1143 | static atomic_t active_events = ATOMIC_INIT(0); |
59abbd1e DM |
1144 | static DEFINE_MUTEX(pmc_grab_mutex); |
1145 | ||
d1751388 DM |
1146 | static void perf_stop_nmi_watchdog(void *unused) |
1147 | { | |
494fc421 | 1148 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
3f1a2097 | 1149 | int i; |
d1751388 DM |
1150 | |
1151 | stop_nmi_watchdog(NULL); | |
3f1a2097 DM |
1152 | for (i = 0; i < sparc_pmu->num_pcrs; i++) |
1153 | cpuc->pcr[i] = pcr_ops->read_pcr(i); | |
d1751388 DM |
1154 | } |
1155 | ||
265c1ffa | 1156 | static void perf_event_grab_pmc(void) |
59abbd1e | 1157 | { |
cdd6c482 | 1158 | if (atomic_inc_not_zero(&active_events)) |
59abbd1e DM |
1159 | return; |
1160 | ||
1161 | mutex_lock(&pmc_grab_mutex); | |
cdd6c482 | 1162 | if (atomic_read(&active_events) == 0) { |
59abbd1e | 1163 | if (atomic_read(&nmi_active) > 0) { |
d1751388 | 1164 | on_each_cpu(perf_stop_nmi_watchdog, NULL, 1); |
59abbd1e DM |
1165 | BUG_ON(atomic_read(&nmi_active) != 0); |
1166 | } | |
cdd6c482 | 1167 | atomic_inc(&active_events); |
59abbd1e DM |
1168 | } |
1169 | mutex_unlock(&pmc_grab_mutex); | |
1170 | } | |
1171 | ||
265c1ffa | 1172 | static void perf_event_release_pmc(void) |
59abbd1e | 1173 | { |
cdd6c482 | 1174 | if (atomic_dec_and_mutex_lock(&active_events, &pmc_grab_mutex)) { |
59abbd1e DM |
1175 | if (atomic_read(&nmi_active) == 0) |
1176 | on_each_cpu(start_nmi_watchdog, NULL, 1); | |
1177 | mutex_unlock(&pmc_grab_mutex); | |
1178 | } | |
1179 | } | |
1180 | ||
2ce4da2e DM |
1181 | static const struct perf_event_map *sparc_map_cache_event(u64 config) |
1182 | { | |
1183 | unsigned int cache_type, cache_op, cache_result; | |
1184 | const struct perf_event_map *pmap; | |
1185 | ||
1186 | if (!sparc_pmu->cache_map) | |
1187 | return ERR_PTR(-ENOENT); | |
1188 | ||
1189 | cache_type = (config >> 0) & 0xff; | |
1190 | if (cache_type >= PERF_COUNT_HW_CACHE_MAX) | |
1191 | return ERR_PTR(-EINVAL); | |
1192 | ||
1193 | cache_op = (config >> 8) & 0xff; | |
1194 | if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX) | |
1195 | return ERR_PTR(-EINVAL); | |
1196 | ||
1197 | cache_result = (config >> 16) & 0xff; | |
1198 | if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX) | |
1199 | return ERR_PTR(-EINVAL); | |
1200 | ||
1201 | pmap = &((*sparc_pmu->cache_map)[cache_type][cache_op][cache_result]); | |
1202 | ||
1203 | if (pmap->encoding == CACHE_OP_UNSUPPORTED) | |
1204 | return ERR_PTR(-ENOENT); | |
1205 | ||
1206 | if (pmap->encoding == CACHE_OP_NONSENSE) | |
1207 | return ERR_PTR(-EINVAL); | |
1208 | ||
1209 | return pmap; | |
1210 | } | |
1211 | ||
cdd6c482 | 1212 | static void hw_perf_event_destroy(struct perf_event *event) |
59abbd1e | 1213 | { |
cdd6c482 | 1214 | perf_event_release_pmc(); |
59abbd1e DM |
1215 | } |
1216 | ||
a72a8a5f DM |
1217 | /* Make sure all events can be scheduled into the hardware at |
1218 | * the same time. This is simplified by the fact that we only | |
1219 | * need to support 2 simultaneous HW events. | |
e7bef6b0 DM |
1220 | * |
1221 | * As a side effect, the evts[]->hw.idx values will be assigned | |
1222 | * on success. These are pending indexes. When the events are | |
1223 | * actually programmed into the chip, these values will propagate | |
1224 | * to the per-cpu cpuc->current_idx[] slots, see the code in | |
1225 | * maybe_change_configuration() for details. | |
a72a8a5f | 1226 | */ |
e7bef6b0 DM |
1227 | static int sparc_check_constraints(struct perf_event **evts, |
1228 | unsigned long *events, int n_ev) | |
a72a8a5f | 1229 | { |
e7bef6b0 DM |
1230 | u8 msk0 = 0, msk1 = 0; |
1231 | int idx0 = 0; | |
1232 | ||
1233 | /* This case is possible when we are invoked from | |
1234 | * hw_perf_group_sched_in(). | |
1235 | */ | |
1236 | if (!n_ev) | |
1237 | return 0; | |
1238 | ||
59660495 | 1239 | if (n_ev > sparc_pmu->max_hw_events) |
e7bef6b0 DM |
1240 | return -1; |
1241 | ||
b38e99f5 DM |
1242 | if (!(sparc_pmu->flags & SPARC_PMU_HAS_CONFLICTS)) { |
1243 | int i; | |
1244 | ||
1245 | for (i = 0; i < n_ev; i++) | |
1246 | evts[i]->hw.idx = i; | |
1247 | return 0; | |
1248 | } | |
1249 | ||
e7bef6b0 DM |
1250 | msk0 = perf_event_get_msk(events[0]); |
1251 | if (n_ev == 1) { | |
1252 | if (msk0 & PIC_LOWER) | |
1253 | idx0 = 1; | |
1254 | goto success; | |
1255 | } | |
1256 | BUG_ON(n_ev != 2); | |
1257 | msk1 = perf_event_get_msk(events[1]); | |
1258 | ||
1259 | /* If both events can go on any counter, OK. */ | |
1260 | if (msk0 == (PIC_UPPER | PIC_LOWER) && | |
1261 | msk1 == (PIC_UPPER | PIC_LOWER)) | |
1262 | goto success; | |
1263 | ||
1264 | /* If one event is limited to a specific counter, | |
1265 | * and the other can go on both, OK. | |
1266 | */ | |
1267 | if ((msk0 == PIC_UPPER || msk0 == PIC_LOWER) && | |
1268 | msk1 == (PIC_UPPER | PIC_LOWER)) { | |
1269 | if (msk0 & PIC_LOWER) | |
1270 | idx0 = 1; | |
1271 | goto success; | |
a72a8a5f DM |
1272 | } |
1273 | ||
e7bef6b0 DM |
1274 | if ((msk1 == PIC_UPPER || msk1 == PIC_LOWER) && |
1275 | msk0 == (PIC_UPPER | PIC_LOWER)) { | |
1276 | if (msk1 & PIC_UPPER) | |
1277 | idx0 = 1; | |
1278 | goto success; | |
1279 | } | |
1280 | ||
1281 | /* If the events are fixed to different counters, OK. */ | |
1282 | if ((msk0 == PIC_UPPER && msk1 == PIC_LOWER) || | |
1283 | (msk0 == PIC_LOWER && msk1 == PIC_UPPER)) { | |
1284 | if (msk0 & PIC_LOWER) | |
1285 | idx0 = 1; | |
1286 | goto success; | |
1287 | } | |
1288 | ||
1289 | /* Otherwise, there is a conflict. */ | |
a72a8a5f | 1290 | return -1; |
e7bef6b0 DM |
1291 | |
1292 | success: | |
1293 | evts[0]->hw.idx = idx0; | |
1294 | if (n_ev == 2) | |
1295 | evts[1]->hw.idx = idx0 ^ 1; | |
1296 | return 0; | |
a72a8a5f DM |
1297 | } |
1298 | ||
01552f76 DM |
1299 | static int check_excludes(struct perf_event **evts, int n_prev, int n_new) |
1300 | { | |
1301 | int eu = 0, ek = 0, eh = 0; | |
1302 | struct perf_event *event; | |
1303 | int i, n, first; | |
1304 | ||
b38e99f5 DM |
1305 | if (!(sparc_pmu->flags & SPARC_PMU_ALL_EXCLUDES_SAME)) |
1306 | return 0; | |
1307 | ||
01552f76 DM |
1308 | n = n_prev + n_new; |
1309 | if (n <= 1) | |
1310 | return 0; | |
1311 | ||
1312 | first = 1; | |
1313 | for (i = 0; i < n; i++) { | |
1314 | event = evts[i]; | |
1315 | if (first) { | |
1316 | eu = event->attr.exclude_user; | |
1317 | ek = event->attr.exclude_kernel; | |
1318 | eh = event->attr.exclude_hv; | |
1319 | first = 0; | |
1320 | } else if (event->attr.exclude_user != eu || | |
1321 | event->attr.exclude_kernel != ek || | |
1322 | event->attr.exclude_hv != eh) { | |
1323 | return -EAGAIN; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | static int collect_events(struct perf_event *group, int max_count, | |
e7bef6b0 DM |
1331 | struct perf_event *evts[], unsigned long *events, |
1332 | int *current_idx) | |
01552f76 DM |
1333 | { |
1334 | struct perf_event *event; | |
1335 | int n = 0; | |
1336 | ||
1337 | if (!is_software_event(group)) { | |
1338 | if (n >= max_count) | |
1339 | return -1; | |
1340 | evts[n] = group; | |
e7bef6b0 DM |
1341 | events[n] = group->hw.event_base; |
1342 | current_idx[n++] = PIC_NO_INDEX; | |
01552f76 DM |
1343 | } |
1344 | list_for_each_entry(event, &group->sibling_list, group_entry) { | |
1345 | if (!is_software_event(event) && | |
1346 | event->state != PERF_EVENT_STATE_OFF) { | |
1347 | if (n >= max_count) | |
1348 | return -1; | |
1349 | evts[n] = event; | |
e7bef6b0 DM |
1350 | events[n] = event->hw.event_base; |
1351 | current_idx[n++] = PIC_NO_INDEX; | |
01552f76 DM |
1352 | } |
1353 | } | |
1354 | return n; | |
1355 | } | |
1356 | ||
a4eaf7f1 | 1357 | static int sparc_pmu_add(struct perf_event *event, int ef_flags) |
e7bef6b0 | 1358 | { |
494fc421 | 1359 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
e7bef6b0 DM |
1360 | int n0, ret = -EAGAIN; |
1361 | unsigned long flags; | |
1362 | ||
1363 | local_irq_save(flags); | |
e7bef6b0 DM |
1364 | |
1365 | n0 = cpuc->n_events; | |
59660495 | 1366 | if (n0 >= sparc_pmu->max_hw_events) |
e7bef6b0 DM |
1367 | goto out; |
1368 | ||
1369 | cpuc->event[n0] = event; | |
1370 | cpuc->events[n0] = event->hw.event_base; | |
1371 | cpuc->current_idx[n0] = PIC_NO_INDEX; | |
1372 | ||
a4eaf7f1 PZ |
1373 | event->hw.state = PERF_HES_UPTODATE; |
1374 | if (!(ef_flags & PERF_EF_START)) | |
1375 | event->hw.state |= PERF_HES_STOPPED; | |
1376 | ||
a13c3afd LM |
1377 | /* |
1378 | * If group events scheduling transaction was started, | |
25985edc | 1379 | * skip the schedulability test here, it will be performed |
a13c3afd LM |
1380 | * at commit time(->commit_txn) as a whole |
1381 | */ | |
8d2cacbb | 1382 | if (cpuc->group_flag & PERF_EVENT_TXN) |
a13c3afd LM |
1383 | goto nocheck; |
1384 | ||
e7bef6b0 DM |
1385 | if (check_excludes(cpuc->event, n0, 1)) |
1386 | goto out; | |
1387 | if (sparc_check_constraints(cpuc->event, cpuc->events, n0 + 1)) | |
1388 | goto out; | |
1389 | ||
a13c3afd | 1390 | nocheck: |
e7bef6b0 DM |
1391 | cpuc->n_events++; |
1392 | cpuc->n_added++; | |
1393 | ||
1394 | ret = 0; | |
1395 | out: | |
e7bef6b0 DM |
1396 | local_irq_restore(flags); |
1397 | return ret; | |
1398 | } | |
1399 | ||
b0a873eb | 1400 | static int sparc_pmu_event_init(struct perf_event *event) |
59abbd1e | 1401 | { |
cdd6c482 | 1402 | struct perf_event_attr *attr = &event->attr; |
01552f76 | 1403 | struct perf_event *evts[MAX_HWEVENTS]; |
cdd6c482 | 1404 | struct hw_perf_event *hwc = &event->hw; |
a72a8a5f | 1405 | unsigned long events[MAX_HWEVENTS]; |
e7bef6b0 | 1406 | int current_idx_dmy[MAX_HWEVENTS]; |
59abbd1e | 1407 | const struct perf_event_map *pmap; |
01552f76 | 1408 | int n; |
59abbd1e DM |
1409 | |
1410 | if (atomic_read(&nmi_active) < 0) | |
1411 | return -ENODEV; | |
1412 | ||
2481c5fa SE |
1413 | /* does not support taken branch sampling */ |
1414 | if (has_branch_stack(event)) | |
1415 | return -EOPNOTSUPP; | |
1416 | ||
b0a873eb PZ |
1417 | switch (attr->type) { |
1418 | case PERF_TYPE_HARDWARE: | |
2ce4da2e DM |
1419 | if (attr->config >= sparc_pmu->max_events) |
1420 | return -EINVAL; | |
1421 | pmap = sparc_pmu->event_map(attr->config); | |
b0a873eb PZ |
1422 | break; |
1423 | ||
1424 | case PERF_TYPE_HW_CACHE: | |
2ce4da2e DM |
1425 | pmap = sparc_map_cache_event(attr->config); |
1426 | if (IS_ERR(pmap)) | |
1427 | return PTR_ERR(pmap); | |
b0a873eb PZ |
1428 | break; |
1429 | ||
1430 | case PERF_TYPE_RAW: | |
d0303d71 IM |
1431 | pmap = NULL; |
1432 | break; | |
59abbd1e | 1433 | |
b0a873eb PZ |
1434 | default: |
1435 | return -ENOENT; | |
1436 | ||
1437 | } | |
1438 | ||
b343ae51 DM |
1439 | if (pmap) { |
1440 | hwc->event_base = perf_event_encode(pmap); | |
1441 | } else { | |
d0303d71 IM |
1442 | /* |
1443 | * User gives us "(encoding << 16) | pic_mask" for | |
b343ae51 DM |
1444 | * PERF_TYPE_RAW events. |
1445 | */ | |
1446 | hwc->event_base = attr->config; | |
1447 | } | |
1448 | ||
e7bef6b0 | 1449 | /* We save the enable bits in the config_base. */ |
496c07e3 | 1450 | hwc->config_base = sparc_pmu->irq_bit; |
59abbd1e | 1451 | if (!attr->exclude_user) |
7ac2ed28 | 1452 | hwc->config_base |= sparc_pmu->user_bit; |
59abbd1e | 1453 | if (!attr->exclude_kernel) |
7ac2ed28 | 1454 | hwc->config_base |= sparc_pmu->priv_bit; |
91b9286d DM |
1455 | if (!attr->exclude_hv) |
1456 | hwc->config_base |= sparc_pmu->hv_bit; | |
59abbd1e | 1457 | |
01552f76 DM |
1458 | n = 0; |
1459 | if (event->group_leader != event) { | |
1460 | n = collect_events(event->group_leader, | |
59660495 | 1461 | sparc_pmu->max_hw_events - 1, |
e7bef6b0 | 1462 | evts, events, current_idx_dmy); |
01552f76 DM |
1463 | if (n < 0) |
1464 | return -EINVAL; | |
1465 | } | |
a72a8a5f | 1466 | events[n] = hwc->event_base; |
01552f76 DM |
1467 | evts[n] = event; |
1468 | ||
1469 | if (check_excludes(evts, n, 1)) | |
1470 | return -EINVAL; | |
1471 | ||
e7bef6b0 | 1472 | if (sparc_check_constraints(evts, events, n + 1)) |
a72a8a5f DM |
1473 | return -EINVAL; |
1474 | ||
e7bef6b0 DM |
1475 | hwc->idx = PIC_NO_INDEX; |
1476 | ||
01552f76 DM |
1477 | /* Try to do all error checking before this point, as unwinding |
1478 | * state after grabbing the PMC is difficult. | |
1479 | */ | |
1480 | perf_event_grab_pmc(); | |
1481 | event->destroy = hw_perf_event_destroy; | |
1482 | ||
59abbd1e DM |
1483 | if (!hwc->sample_period) { |
1484 | hwc->sample_period = MAX_PERIOD; | |
1485 | hwc->last_period = hwc->sample_period; | |
e7850595 | 1486 | local64_set(&hwc->period_left, hwc->sample_period); |
59abbd1e DM |
1487 | } |
1488 | ||
59abbd1e DM |
1489 | return 0; |
1490 | } | |
1491 | ||
a13c3afd LM |
1492 | /* |
1493 | * Start group events scheduling transaction | |
1494 | * Set the flag to make pmu::enable() not perform the | |
1495 | * schedulability test, it will be performed at commit time | |
1496 | */ | |
51b0fe39 | 1497 | static void sparc_pmu_start_txn(struct pmu *pmu) |
a13c3afd | 1498 | { |
494fc421 | 1499 | struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events); |
a13c3afd | 1500 | |
33696fc0 | 1501 | perf_pmu_disable(pmu); |
8d2cacbb | 1502 | cpuhw->group_flag |= PERF_EVENT_TXN; |
a13c3afd LM |
1503 | } |
1504 | ||
1505 | /* | |
1506 | * Stop group events scheduling transaction | |
1507 | * Clear the flag and pmu::enable() will perform the | |
1508 | * schedulability test. | |
1509 | */ | |
51b0fe39 | 1510 | static void sparc_pmu_cancel_txn(struct pmu *pmu) |
a13c3afd | 1511 | { |
494fc421 | 1512 | struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events); |
a13c3afd | 1513 | |
8d2cacbb | 1514 | cpuhw->group_flag &= ~PERF_EVENT_TXN; |
33696fc0 | 1515 | perf_pmu_enable(pmu); |
a13c3afd LM |
1516 | } |
1517 | ||
1518 | /* | |
1519 | * Commit group events scheduling transaction | |
1520 | * Perform the group schedulability test as a whole | |
1521 | * Return 0 if success | |
1522 | */ | |
51b0fe39 | 1523 | static int sparc_pmu_commit_txn(struct pmu *pmu) |
a13c3afd | 1524 | { |
494fc421 | 1525 | struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); |
a13c3afd LM |
1526 | int n; |
1527 | ||
1528 | if (!sparc_pmu) | |
1529 | return -EINVAL; | |
1530 | ||
494fc421 | 1531 | cpuc = this_cpu_ptr(&cpu_hw_events); |
a13c3afd LM |
1532 | n = cpuc->n_events; |
1533 | if (check_excludes(cpuc->event, 0, n)) | |
1534 | return -EINVAL; | |
1535 | if (sparc_check_constraints(cpuc->event, cpuc->events, n)) | |
1536 | return -EAGAIN; | |
1537 | ||
8d2cacbb | 1538 | cpuc->group_flag &= ~PERF_EVENT_TXN; |
33696fc0 | 1539 | perf_pmu_enable(pmu); |
a13c3afd LM |
1540 | return 0; |
1541 | } | |
1542 | ||
51b0fe39 | 1543 | static struct pmu pmu = { |
a4eaf7f1 PZ |
1544 | .pmu_enable = sparc_pmu_enable, |
1545 | .pmu_disable = sparc_pmu_disable, | |
b0a873eb | 1546 | .event_init = sparc_pmu_event_init, |
a4eaf7f1 PZ |
1547 | .add = sparc_pmu_add, |
1548 | .del = sparc_pmu_del, | |
1549 | .start = sparc_pmu_start, | |
1550 | .stop = sparc_pmu_stop, | |
59abbd1e | 1551 | .read = sparc_pmu_read, |
a13c3afd LM |
1552 | .start_txn = sparc_pmu_start_txn, |
1553 | .cancel_txn = sparc_pmu_cancel_txn, | |
1554 | .commit_txn = sparc_pmu_commit_txn, | |
59abbd1e DM |
1555 | }; |
1556 | ||
cdd6c482 | 1557 | void perf_event_print_debug(void) |
59abbd1e DM |
1558 | { |
1559 | unsigned long flags; | |
3f1a2097 | 1560 | int cpu, i; |
59abbd1e DM |
1561 | |
1562 | if (!sparc_pmu) | |
1563 | return; | |
1564 | ||
1565 | local_irq_save(flags); | |
1566 | ||
1567 | cpu = smp_processor_id(); | |
1568 | ||
59abbd1e | 1569 | pr_info("\n"); |
3f1a2097 DM |
1570 | for (i = 0; i < sparc_pmu->num_pcrs; i++) |
1571 | pr_info("CPU#%d: PCR%d[%016llx]\n", | |
1572 | cpu, i, pcr_ops->read_pcr(i)); | |
1573 | for (i = 0; i < sparc_pmu->num_pic_regs; i++) | |
1574 | pr_info("CPU#%d: PIC%d[%016llx]\n", | |
1575 | cpu, i, pcr_ops->read_pic(i)); | |
59abbd1e DM |
1576 | |
1577 | local_irq_restore(flags); | |
1578 | } | |
1579 | ||
cdd6c482 | 1580 | static int __kprobes perf_event_nmi_handler(struct notifier_block *self, |
d29862f0 | 1581 | unsigned long cmd, void *__args) |
59abbd1e DM |
1582 | { |
1583 | struct die_args *args = __args; | |
1584 | struct perf_sample_data data; | |
cdd6c482 | 1585 | struct cpu_hw_events *cpuc; |
59abbd1e | 1586 | struct pt_regs *regs; |
e7bef6b0 | 1587 | int i; |
59abbd1e | 1588 | |
cdd6c482 | 1589 | if (!atomic_read(&active_events)) |
59abbd1e DM |
1590 | return NOTIFY_DONE; |
1591 | ||
1592 | switch (cmd) { | |
1593 | case DIE_NMI: | |
1594 | break; | |
1595 | ||
1596 | default: | |
1597 | return NOTIFY_DONE; | |
1598 | } | |
1599 | ||
1600 | regs = args->regs; | |
1601 | ||
494fc421 | 1602 | cpuc = this_cpu_ptr(&cpu_hw_events); |
e04ed38d DM |
1603 | |
1604 | /* If the PMU has the TOE IRQ enable bits, we need to do a | |
1605 | * dummy write to the %pcr to clear the overflow bits and thus | |
1606 | * the interrupt. | |
1607 | * | |
1608 | * Do this before we peek at the counters to determine | |
1609 | * overflow so we don't lose any events. | |
1610 | */ | |
3f1a2097 DM |
1611 | if (sparc_pmu->irq_bit && |
1612 | sparc_pmu->num_pcrs == 1) | |
1613 | pcr_ops->write_pcr(0, cpuc->pcr[0]); | |
e04ed38d | 1614 | |
e7bef6b0 DM |
1615 | for (i = 0; i < cpuc->n_events; i++) { |
1616 | struct perf_event *event = cpuc->event[i]; | |
1617 | int idx = cpuc->current_idx[i]; | |
cdd6c482 | 1618 | struct hw_perf_event *hwc; |
59abbd1e DM |
1619 | u64 val; |
1620 | ||
3f1a2097 DM |
1621 | if (sparc_pmu->irq_bit && |
1622 | sparc_pmu->num_pcrs > 1) | |
1623 | pcr_ops->write_pcr(idx, cpuc->pcr[idx]); | |
1624 | ||
cdd6c482 IM |
1625 | hwc = &event->hw; |
1626 | val = sparc_perf_event_update(event, hwc, idx); | |
59abbd1e DM |
1627 | if (val & (1ULL << 31)) |
1628 | continue; | |
1629 | ||
fd0d000b | 1630 | perf_sample_data_init(&data, 0, hwc->last_period); |
cdd6c482 | 1631 | if (!sparc_perf_event_set_period(event, hwc, idx)) |
59abbd1e DM |
1632 | continue; |
1633 | ||
a8b0ca17 | 1634 | if (perf_event_overflow(event, &data, regs)) |
a4eaf7f1 | 1635 | sparc_pmu_stop(event, 0); |
59abbd1e DM |
1636 | } |
1637 | ||
1638 | return NOTIFY_STOP; | |
1639 | } | |
1640 | ||
cdd6c482 IM |
1641 | static __read_mostly struct notifier_block perf_event_nmi_notifier = { |
1642 | .notifier_call = perf_event_nmi_handler, | |
59abbd1e DM |
1643 | }; |
1644 | ||
1645 | static bool __init supported_pmu(void) | |
1646 | { | |
28e8f9be DM |
1647 | if (!strcmp(sparc_pmu_type, "ultra3") || |
1648 | !strcmp(sparc_pmu_type, "ultra3+") || | |
1649 | !strcmp(sparc_pmu_type, "ultra3i") || | |
1650 | !strcmp(sparc_pmu_type, "ultra4+")) { | |
1651 | sparc_pmu = &ultra3_pmu; | |
59abbd1e DM |
1652 | return true; |
1653 | } | |
7eebda60 DM |
1654 | if (!strcmp(sparc_pmu_type, "niagara")) { |
1655 | sparc_pmu = &niagara1_pmu; | |
1656 | return true; | |
1657 | } | |
4ba991d3 DM |
1658 | if (!strcmp(sparc_pmu_type, "niagara2") || |
1659 | !strcmp(sparc_pmu_type, "niagara3")) { | |
b73d8847 DM |
1660 | sparc_pmu = &niagara2_pmu; |
1661 | return true; | |
1662 | } | |
05aa1651 | 1663 | if (!strcmp(sparc_pmu_type, "niagara4") || |
1664 | !strcmp(sparc_pmu_type, "niagara5")) { | |
035ea28d DM |
1665 | sparc_pmu = &niagara4_pmu; |
1666 | return true; | |
1667 | } | |
b5aff55d DA |
1668 | if (!strcmp(sparc_pmu_type, "sparc-m7")) { |
1669 | sparc_pmu = &sparc_m7_pmu; | |
1670 | return true; | |
1671 | } | |
59abbd1e DM |
1672 | return false; |
1673 | } | |
1674 | ||
265c1ffa | 1675 | static int __init init_hw_perf_events(void) |
59abbd1e | 1676 | { |
8bccf5b3 DM |
1677 | int err; |
1678 | ||
cdd6c482 | 1679 | pr_info("Performance events: "); |
59abbd1e | 1680 | |
8bccf5b3 DM |
1681 | err = pcr_arch_init(); |
1682 | if (err || !supported_pmu()) { | |
59abbd1e | 1683 | pr_cont("No support for PMU type '%s'\n", sparc_pmu_type); |
004417a6 | 1684 | return 0; |
59abbd1e DM |
1685 | } |
1686 | ||
1687 | pr_cont("Supported PMU type is '%s'\n", sparc_pmu_type); | |
1688 | ||
2e80a82a | 1689 | perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW); |
cdd6c482 | 1690 | register_die_notifier(&perf_event_nmi_notifier); |
004417a6 PZ |
1691 | |
1692 | return 0; | |
59abbd1e | 1693 | } |
8bccf5b3 | 1694 | pure_initcall(init_hw_perf_events); |
4f6dbe4a | 1695 | |
56962b44 FW |
1696 | void perf_callchain_kernel(struct perf_callchain_entry *entry, |
1697 | struct pt_regs *regs) | |
4f6dbe4a DM |
1698 | { |
1699 | unsigned long ksp, fp; | |
667f0cee DM |
1700 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
1701 | int graph = 0; | |
1702 | #endif | |
4f6dbe4a | 1703 | |
56962b44 FW |
1704 | stack_trace_flush(); |
1705 | ||
70791ce9 | 1706 | perf_callchain_store(entry, regs->tpc); |
4f6dbe4a DM |
1707 | |
1708 | ksp = regs->u_regs[UREG_I6]; | |
1709 | fp = ksp + STACK_BIAS; | |
1710 | do { | |
1711 | struct sparc_stackf *sf; | |
1712 | struct pt_regs *regs; | |
1713 | unsigned long pc; | |
1714 | ||
1715 | if (!kstack_valid(current_thread_info(), fp)) | |
1716 | break; | |
1717 | ||
1718 | sf = (struct sparc_stackf *) fp; | |
1719 | regs = (struct pt_regs *) (sf + 1); | |
1720 | ||
1721 | if (kstack_is_trap_frame(current_thread_info(), regs)) { | |
1722 | if (user_mode(regs)) | |
1723 | break; | |
1724 | pc = regs->tpc; | |
1725 | fp = regs->u_regs[UREG_I6] + STACK_BIAS; | |
1726 | } else { | |
1727 | pc = sf->callers_pc; | |
1728 | fp = (unsigned long)sf->fp + STACK_BIAS; | |
1729 | } | |
70791ce9 | 1730 | perf_callchain_store(entry, pc); |
667f0cee DM |
1731 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
1732 | if ((pc + 8UL) == (unsigned long) &return_to_handler) { | |
1733 | int index = current->curr_ret_stack; | |
1734 | if (current->ret_stack && index >= graph) { | |
1735 | pc = current->ret_stack[index - graph].ret; | |
70791ce9 | 1736 | perf_callchain_store(entry, pc); |
667f0cee DM |
1737 | graph++; |
1738 | } | |
1739 | } | |
1740 | #endif | |
4f6dbe4a DM |
1741 | } while (entry->nr < PERF_MAX_STACK_DEPTH); |
1742 | } | |
1743 | ||
b69fb769 DA |
1744 | static inline int |
1745 | valid_user_frame(const void __user *fp, unsigned long size) | |
1746 | { | |
1747 | /* addresses should be at least 4-byte aligned */ | |
1748 | if (((unsigned long) fp) & 3) | |
1749 | return 0; | |
1750 | ||
1751 | return (__range_not_ok(fp, size, TASK_SIZE) == 0); | |
1752 | } | |
1753 | ||
56962b44 FW |
1754 | static void perf_callchain_user_64(struct perf_callchain_entry *entry, |
1755 | struct pt_regs *regs) | |
4f6dbe4a DM |
1756 | { |
1757 | unsigned long ufp; | |
1758 | ||
4f6dbe4a DM |
1759 | ufp = regs->u_regs[UREG_I6] + STACK_BIAS; |
1760 | do { | |
265c1ffa SR |
1761 | struct sparc_stackf __user *usf; |
1762 | struct sparc_stackf sf; | |
4f6dbe4a DM |
1763 | unsigned long pc; |
1764 | ||
265c1ffa | 1765 | usf = (struct sparc_stackf __user *)ufp; |
b69fb769 DA |
1766 | if (!valid_user_frame(usf, sizeof(sf))) |
1767 | break; | |
1768 | ||
4f6dbe4a DM |
1769 | if (__copy_from_user_inatomic(&sf, usf, sizeof(sf))) |
1770 | break; | |
1771 | ||
1772 | pc = sf.callers_pc; | |
1773 | ufp = (unsigned long)sf.fp + STACK_BIAS; | |
70791ce9 | 1774 | perf_callchain_store(entry, pc); |
4f6dbe4a DM |
1775 | } while (entry->nr < PERF_MAX_STACK_DEPTH); |
1776 | } | |
1777 | ||
56962b44 FW |
1778 | static void perf_callchain_user_32(struct perf_callchain_entry *entry, |
1779 | struct pt_regs *regs) | |
4f6dbe4a DM |
1780 | { |
1781 | unsigned long ufp; | |
1782 | ||
9e8307ec | 1783 | ufp = regs->u_regs[UREG_I6] & 0xffffffffUL; |
4f6dbe4a | 1784 | do { |
4f6dbe4a DM |
1785 | unsigned long pc; |
1786 | ||
517ffce4 | 1787 | if (thread32_stack_is_64bit(ufp)) { |
265c1ffa SR |
1788 | struct sparc_stackf __user *usf; |
1789 | struct sparc_stackf sf; | |
4f6dbe4a | 1790 | |
517ffce4 | 1791 | ufp += STACK_BIAS; |
265c1ffa | 1792 | usf = (struct sparc_stackf __user *)ufp; |
517ffce4 DM |
1793 | if (__copy_from_user_inatomic(&sf, usf, sizeof(sf))) |
1794 | break; | |
1795 | pc = sf.callers_pc & 0xffffffff; | |
1796 | ufp = ((unsigned long) sf.fp) & 0xffffffff; | |
1797 | } else { | |
265c1ffa SR |
1798 | struct sparc_stackf32 __user *usf; |
1799 | struct sparc_stackf32 sf; | |
1800 | usf = (struct sparc_stackf32 __user *)ufp; | |
517ffce4 DM |
1801 | if (__copy_from_user_inatomic(&sf, usf, sizeof(sf))) |
1802 | break; | |
1803 | pc = sf.callers_pc; | |
1804 | ufp = (unsigned long)sf.fp; | |
1805 | } | |
70791ce9 | 1806 | perf_callchain_store(entry, pc); |
4f6dbe4a DM |
1807 | } while (entry->nr < PERF_MAX_STACK_DEPTH); |
1808 | } | |
1809 | ||
56962b44 FW |
1810 | void |
1811 | perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) | |
4f6dbe4a | 1812 | { |
08280e6c DM |
1813 | perf_callchain_store(entry, regs->tpc); |
1814 | ||
1815 | if (!current->mm) | |
1816 | return; | |
1817 | ||
56962b44 | 1818 | flushw_user(); |
c17af4dd DA |
1819 | |
1820 | pagefault_disable(); | |
1821 | ||
56962b44 FW |
1822 | if (test_thread_flag(TIF_32BIT)) |
1823 | perf_callchain_user_32(entry, regs); | |
1824 | else | |
1825 | perf_callchain_user_64(entry, regs); | |
c17af4dd DA |
1826 | |
1827 | pagefault_enable(); | |
4f6dbe4a | 1828 | } |