1 // SPDX-License-Identifier: GPL-2.0
2 #include <inttypes.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <stdbool.h>
6 #include <linux/kernel.h>
7 #include <linux/types.h>
8 #include <linux/perf_event.h>
9 #include "util/evsel_fprintf.h"
10 #include "util/pmu.h"
11 #include "util/pmus.h"
12 #include "trace-event.h"
13 
14 struct bit_names {
15 	int bit;
16 	const char *name;
17 };
18 
__p_bits(char * buf,size_t size,u64 value,struct bit_names * bits)19 static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
20 {
21 	bool first_bit = true;
22 	int i = 0;
23 
24 	do {
25 		if (value & bits[i].bit) {
26 			buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
27 			first_bit = false;
28 		}
29 	} while (bits[++i].name != NULL);
30 }
31 
__p_sample_type(char * buf,size_t size,u64 value)32 static void __p_sample_type(char *buf, size_t size, u64 value)
33 {
34 #define bit_name(n) { PERF_SAMPLE_##n, #n }
35 	struct bit_names bits[] = {
36 		bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
37 		bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
38 		bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
39 		bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
40 		bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
41 		bit_name(WEIGHT), bit_name(PHYS_ADDR), bit_name(AUX),
42 		bit_name(CGROUP), bit_name(DATA_PAGE_SIZE), bit_name(CODE_PAGE_SIZE),
43 		bit_name(WEIGHT_STRUCT),
44 		{ .name = NULL, }
45 	};
46 #undef bit_name
47 	__p_bits(buf, size, value, bits);
48 }
49 
__p_branch_sample_type(char * buf,size_t size,u64 value)50 static void __p_branch_sample_type(char *buf, size_t size, u64 value)
51 {
52 #define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n }
53 	struct bit_names bits[] = {
54 		bit_name(USER), bit_name(KERNEL), bit_name(HV), bit_name(ANY),
55 		bit_name(ANY_CALL), bit_name(ANY_RETURN), bit_name(IND_CALL),
56 		bit_name(ABORT_TX), bit_name(IN_TX), bit_name(NO_TX),
57 		bit_name(COND), bit_name(CALL_STACK), bit_name(IND_JUMP),
58 		bit_name(CALL), bit_name(NO_FLAGS), bit_name(NO_CYCLES),
59 		bit_name(TYPE_SAVE), bit_name(HW_INDEX), bit_name(PRIV_SAVE),
60 		bit_name(COUNTERS),
61 		{ .name = NULL, }
62 	};
63 #undef bit_name
64 	__p_bits(buf, size, value, bits);
65 }
66 
__p_read_format(char * buf,size_t size,u64 value)67 static void __p_read_format(char *buf, size_t size, u64 value)
68 {
69 #define bit_name(n) { PERF_FORMAT_##n, #n }
70 	struct bit_names bits[] = {
71 		bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
72 		bit_name(ID), bit_name(GROUP), bit_name(LOST),
73 		{ .name = NULL, }
74 	};
75 #undef bit_name
76 	__p_bits(buf, size, value, bits);
77 }
78 
79 #define ENUM_ID_TO_STR_CASE(x) case x: return (#x);
stringify_perf_type_id(struct perf_pmu * pmu,u32 type)80 static const char *stringify_perf_type_id(struct perf_pmu *pmu, u32 type)
81 {
82 	switch (type) {
83 	ENUM_ID_TO_STR_CASE(PERF_TYPE_HARDWARE)
84 	ENUM_ID_TO_STR_CASE(PERF_TYPE_SOFTWARE)
85 	ENUM_ID_TO_STR_CASE(PERF_TYPE_TRACEPOINT)
86 	ENUM_ID_TO_STR_CASE(PERF_TYPE_HW_CACHE)
87 	ENUM_ID_TO_STR_CASE(PERF_TYPE_BREAKPOINT)
88 	case PERF_TYPE_RAW:
89 		return pmu ? pmu->name : "PERF_TYPE_RAW";
90 	default:
91 		return pmu ? pmu->name : NULL;
92 	}
93 }
94 
stringify_perf_hw_id(u64 value)95 static const char *stringify_perf_hw_id(u64 value)
96 {
97 	switch (value & PERF_HW_EVENT_MASK) {
98 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CPU_CYCLES)
99 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_INSTRUCTIONS)
100 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_REFERENCES)
101 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_MISSES)
102 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_BRANCH_INSTRUCTIONS)
103 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_BRANCH_MISSES)
104 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_BUS_CYCLES)
105 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_STALLED_CYCLES_FRONTEND)
106 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_STALLED_CYCLES_BACKEND)
107 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_REF_CPU_CYCLES)
108 	default:
109 		return NULL;
110 	}
111 }
112 
stringify_perf_hw_cache_id(u64 value)113 static const char *stringify_perf_hw_cache_id(u64 value)
114 {
115 	switch (value) {
116 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_L1D)
117 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_L1I)
118 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_LL)
119 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_DTLB)
120 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_ITLB)
121 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_BPU)
122 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_NODE)
123 	default:
124 		return NULL;
125 	}
126 }
127 
stringify_perf_hw_cache_op_id(u64 value)128 static const char *stringify_perf_hw_cache_op_id(u64 value)
129 {
130 	switch (value) {
131 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_OP_READ)
132 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_OP_WRITE)
133 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_OP_PREFETCH)
134 	default:
135 		return NULL;
136 	}
137 }
138 
stringify_perf_hw_cache_op_result_id(u64 value)139 static const char *stringify_perf_hw_cache_op_result_id(u64 value)
140 {
141 	switch (value) {
142 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_RESULT_ACCESS)
143 	ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_RESULT_MISS)
144 	default:
145 		return NULL;
146 	}
147 }
148 
stringify_perf_sw_id(u64 value)149 static const char *stringify_perf_sw_id(u64 value)
150 {
151 	switch (value) {
152 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_CPU_CLOCK)
153 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_TASK_CLOCK)
154 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_PAGE_FAULTS)
155 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_CONTEXT_SWITCHES)
156 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_CPU_MIGRATIONS)
157 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_PAGE_FAULTS_MIN)
158 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_PAGE_FAULTS_MAJ)
159 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_ALIGNMENT_FAULTS)
160 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_EMULATION_FAULTS)
161 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_DUMMY)
162 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_BPF_OUTPUT)
163 	ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_CGROUP_SWITCHES)
164 	default:
165 		return NULL;
166 	}
167 }
168 #undef ENUM_ID_TO_STR_CASE
169 
print_id_unsigned(char * buf,size_t size,u64 value,const char * s)170 static void print_id_unsigned(char *buf, size_t size, u64 value, const char *s)
171 {
172 	if (s == NULL)
173 		snprintf(buf, size, "%"PRIu64, value);
174 	else
175 		snprintf(buf, size, "%"PRIu64" (%s)", value, s);
176 }
177 
print_id_hex(char * buf,size_t size,u64 value,const char * s)178 static void print_id_hex(char *buf, size_t size, u64 value, const char *s)
179 {
180 	if (s == NULL)
181 		snprintf(buf, size, "%#"PRIx64, value);
182 	else
183 		snprintf(buf, size, "%#"PRIx64" (%s)", value, s);
184 }
185 
__p_type_id(char * buf,size_t size,struct perf_pmu * pmu,u32 type)186 static void __p_type_id(char *buf, size_t size, struct perf_pmu *pmu, u32 type)
187 {
188 	print_id_unsigned(buf, size, type, stringify_perf_type_id(pmu, type));
189 }
190 
__p_config_hw_id(char * buf,size_t size,struct perf_pmu * pmu,u64 config)191 static void __p_config_hw_id(char *buf, size_t size, struct perf_pmu *pmu, u64 config)
192 {
193 	const char *name = stringify_perf_hw_id(config);
194 
195 	if (name == NULL) {
196 		if (pmu == NULL) {
197 			snprintf(buf, size, "%#"PRIx64, config);
198 		} else {
199 			snprintf(buf, size, "%#"PRIx64" (%s/config=%#"PRIx64"/)", config, pmu->name,
200 				 config);
201 		}
202 	} else {
203 		if (pmu == NULL)
204 			snprintf(buf, size, "%#"PRIx64" (%s)", config, name);
205 		else
206 			snprintf(buf, size, "%#"PRIx64" (%s/%s/)", config, pmu->name, name);
207 	}
208 }
209 
__p_config_sw_id(char * buf,size_t size,u64 id)210 static void __p_config_sw_id(char *buf, size_t size, u64 id)
211 {
212 	print_id_hex(buf, size, id, stringify_perf_sw_id(id));
213 }
214 
__p_config_hw_cache_id(char * buf,size_t size,struct perf_pmu * pmu,u64 config)215 static void __p_config_hw_cache_id(char *buf, size_t size, struct perf_pmu *pmu, u64 config)
216 {
217 	const char *hw_cache_str = stringify_perf_hw_cache_id(config & 0xff);
218 	const char *hw_cache_op_str =
219 		stringify_perf_hw_cache_op_id((config & 0xff00) >> 8);
220 	const char *hw_cache_op_result_str =
221 		stringify_perf_hw_cache_op_result_id((config & 0xff0000) >> 16);
222 
223 	if (hw_cache_str == NULL || hw_cache_op_str == NULL || hw_cache_op_result_str == NULL) {
224 		if (pmu == NULL) {
225 			snprintf(buf, size, "%#"PRIx64, config);
226 		} else {
227 			snprintf(buf, size, "%#"PRIx64" (%s/config=%#"PRIx64"/)", config, pmu->name,
228 				 config);
229 		}
230 	} else {
231 		if (pmu == NULL) {
232 			snprintf(buf, size, "%#"PRIx64" (%s | %s | %s)", config,
233 				 hw_cache_op_result_str, hw_cache_op_str, hw_cache_str);
234 		} else {
235 			snprintf(buf, size, "%#"PRIx64" (%s/%s | %s | %s/)", config, pmu->name,
236 				 hw_cache_op_result_str, hw_cache_op_str, hw_cache_str);
237 		}
238 	}
239 }
240 
__p_config_tracepoint_id(char * buf,size_t size,u64 id)241 static void __p_config_tracepoint_id(char *buf, size_t size, u64 id)
242 {
243 	char *str = tracepoint_id_to_name(id);
244 
245 	print_id_hex(buf, size, id, str);
246 	free(str);
247 }
248 
__p_config_id(struct perf_pmu * pmu,char * buf,size_t size,u32 type,u64 config)249 static void __p_config_id(struct perf_pmu *pmu, char *buf, size_t size, u32 type, u64 config)
250 {
251 	switch (type) {
252 	case PERF_TYPE_HARDWARE:
253 		return __p_config_hw_id(buf, size, pmu, config);
254 	case PERF_TYPE_SOFTWARE:
255 		return __p_config_sw_id(buf, size, config);
256 	case PERF_TYPE_HW_CACHE:
257 		return __p_config_hw_cache_id(buf, size, pmu, config);
258 	case PERF_TYPE_TRACEPOINT:
259 		return __p_config_tracepoint_id(buf, size, config);
260 	case PERF_TYPE_RAW:
261 	case PERF_TYPE_BREAKPOINT:
262 	default:
263 		return print_id_hex(buf, size, config, perf_pmu__name_from_config(pmu, config));
264 	}
265 }
266 
267 #define BUF_SIZE		1024
268 
269 #define p_hex(val)		snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
270 #define p_unsigned(val)		snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
271 #define p_signed(val)		snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
272 #define p_sample_type(val)	__p_sample_type(buf, BUF_SIZE, val)
273 #define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val)
274 #define p_read_format(val)	__p_read_format(buf, BUF_SIZE, val)
275 #define p_type_id(val)		__p_type_id(buf, BUF_SIZE, pmu, val)
276 #define p_config_id(val)	__p_config_id(pmu, buf, BUF_SIZE, attr->type, val)
277 
278 #define PRINT_ATTRn(_n, _f, _p, _a)			\
279 do {							\
280 	if (_a || attr->_f) {				\
281 		_p(attr->_f);				\
282 		ret += attr__fprintf(fp, _n, buf, priv);\
283 	}						\
284 } while (0)
285 
286 #define PRINT_ATTRf(_f, _p)	PRINT_ATTRn(#_f, _f, _p, false)
287 
perf_event_attr__fprintf(FILE * fp,struct perf_event_attr * attr,attr__fprintf_f attr__fprintf,void * priv)288 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
289 			     attr__fprintf_f attr__fprintf, void *priv)
290 {
291 	struct perf_pmu *pmu = perf_pmus__find_by_type(attr->type);
292 	char buf[BUF_SIZE];
293 	int ret = 0;
294 
295 	if (!pmu && (attr->type == PERF_TYPE_HARDWARE || attr->type == PERF_TYPE_HW_CACHE)) {
296 		u32 extended_type = attr->config >> PERF_PMU_TYPE_SHIFT;
297 
298 		if (extended_type)
299 			pmu = perf_pmus__find_by_type(extended_type);
300 	}
301 
302 	PRINT_ATTRn("type", type, p_type_id, true);
303 	PRINT_ATTRf(size, p_unsigned);
304 	PRINT_ATTRn("config", config, p_config_id, true);
305 	PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned, false);
306 	PRINT_ATTRf(sample_type, p_sample_type);
307 	PRINT_ATTRf(read_format, p_read_format);
308 
309 	PRINT_ATTRf(disabled, p_unsigned);
310 	PRINT_ATTRf(inherit, p_unsigned);
311 	PRINT_ATTRf(pinned, p_unsigned);
312 	PRINT_ATTRf(exclusive, p_unsigned);
313 	PRINT_ATTRf(exclude_user, p_unsigned);
314 	PRINT_ATTRf(exclude_kernel, p_unsigned);
315 	PRINT_ATTRf(exclude_hv, p_unsigned);
316 	PRINT_ATTRf(exclude_idle, p_unsigned);
317 	PRINT_ATTRf(mmap, p_unsigned);
318 	PRINT_ATTRf(comm, p_unsigned);
319 	PRINT_ATTRf(freq, p_unsigned);
320 	PRINT_ATTRf(inherit_stat, p_unsigned);
321 	PRINT_ATTRf(enable_on_exec, p_unsigned);
322 	PRINT_ATTRf(task, p_unsigned);
323 	PRINT_ATTRf(watermark, p_unsigned);
324 	PRINT_ATTRf(precise_ip, p_unsigned);
325 	PRINT_ATTRf(mmap_data, p_unsigned);
326 	PRINT_ATTRf(sample_id_all, p_unsigned);
327 	PRINT_ATTRf(exclude_host, p_unsigned);
328 	PRINT_ATTRf(exclude_guest, p_unsigned);
329 	PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
330 	PRINT_ATTRf(exclude_callchain_user, p_unsigned);
331 	PRINT_ATTRf(mmap2, p_unsigned);
332 	PRINT_ATTRf(comm_exec, p_unsigned);
333 	PRINT_ATTRf(use_clockid, p_unsigned);
334 	PRINT_ATTRf(context_switch, p_unsigned);
335 	PRINT_ATTRf(write_backward, p_unsigned);
336 	PRINT_ATTRf(namespaces, p_unsigned);
337 	PRINT_ATTRf(ksymbol, p_unsigned);
338 	PRINT_ATTRf(bpf_event, p_unsigned);
339 	PRINT_ATTRf(aux_output, p_unsigned);
340 	PRINT_ATTRf(cgroup, p_unsigned);
341 	PRINT_ATTRf(text_poke, p_unsigned);
342 	PRINT_ATTRf(build_id, p_unsigned);
343 	PRINT_ATTRf(inherit_thread, p_unsigned);
344 	PRINT_ATTRf(remove_on_exec, p_unsigned);
345 	PRINT_ATTRf(sigtrap, p_unsigned);
346 
347 	PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned, false);
348 	PRINT_ATTRf(bp_type, p_unsigned);
349 	PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex, false);
350 	PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex, false);
351 	PRINT_ATTRf(branch_sample_type, p_branch_sample_type);
352 	PRINT_ATTRf(sample_regs_user, p_hex);
353 	PRINT_ATTRf(sample_stack_user, p_unsigned);
354 	PRINT_ATTRf(clockid, p_signed);
355 	PRINT_ATTRf(sample_regs_intr, p_hex);
356 	PRINT_ATTRf(aux_watermark, p_unsigned);
357 	PRINT_ATTRf(sample_max_stack, p_unsigned);
358 	PRINT_ATTRf(aux_sample_size, p_unsigned);
359 	PRINT_ATTRf(sig_data, p_unsigned);
360 	PRINT_ATTRf(aux_start_paused, p_unsigned);
361 	PRINT_ATTRf(aux_pause, p_unsigned);
362 	PRINT_ATTRf(aux_resume, p_unsigned);
363 
364 	return ret;
365 }
366