cpumap.c

  1// SPDX-License-Identifier: GPL-2.0
  2#include <api/fs/fs.h>
  3#include "cpumap.h"
  4#include "debug.h"
  5#include "event.h"
  6#include <assert.h>
  7#include <dirent.h>
  8#include <stdio.h>
  9#include <stdlib.h>
 10#include <linux/bitmap.h>
 11#include "asm/bug.h"
 12
 13#include <linux/ctype.h>
 14#include <linux/zalloc.h>
 15#include <internal/cpumap.h>
 16
 17static struct perf_cpu max_cpu_num;
 18static struct perf_cpu max_present_cpu_num;
 19static int max_node_num;
 20/**
 21 * The numa node X as read from /sys/devices/system/node/nodeX indexed by the
 22 * CPU number.
 23 */
 24static int *cpunode_map;
 25
 26bool perf_record_cpu_map_data__test_bit(int i,
 27					const struct perf_record_cpu_map_data *data)
 28{
 29	int bit_word32 = i / 32;
 30	__u32 bit_mask32 = 1U << (i & 31);
 31	int bit_word64 = i / 64;
 32	__u64 bit_mask64 = ((__u64)1) << (i & 63);
 33
 34	return (data->mask32_data.long_size == 4)
 35		? (bit_word32 < data->mask32_data.nr) &&
 36		(data->mask32_data.mask[bit_word32] & bit_mask32) != 0
 37		: (bit_word64 < data->mask64_data.nr) &&
 38		(data->mask64_data.mask[bit_word64] & bit_mask64) != 0;
 39}
 40
 41/* Read ith mask value from data into the given 64-bit sized bitmap */
 42static void perf_record_cpu_map_data__read_one_mask(const struct perf_record_cpu_map_data *data,
 43						    int i, unsigned long *bitmap)
 44{
 45#if __SIZEOF_LONG__ == 8
 46	if (data->mask32_data.long_size == 4)
 47		bitmap[0] = data->mask32_data.mask[i];
 48	else
 49		bitmap[0] = data->mask64_data.mask[i];
 50#else
 51	if (data->mask32_data.long_size == 4) {
 52		bitmap[0] = data->mask32_data.mask[i];
 53		bitmap[1] = 0;
 54	} else {
 55#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 56		bitmap[0] = (unsigned long)(data->mask64_data.mask[i] >> 32);
 57		bitmap[1] = (unsigned long)data->mask64_data.mask[i];
 58#else
 59		bitmap[0] = (unsigned long)data->mask64_data.mask[i];
 60		bitmap[1] = (unsigned long)(data->mask64_data.mask[i] >> 32);
 61#endif
 62	}
 63#endif
 64}
 65static struct perf_cpu_map *cpu_map__from_entries(const struct perf_record_cpu_map_data *data)
 66{
 67	struct perf_cpu_map *map;
 68
 69	map = perf_cpu_map__empty_new(data->cpus_data.nr);
 70	if (!map)
 71		return NULL;
 72
 73	for (unsigned int i = 0; i < data->cpus_data.nr; i++) {
 74		/*
 75		 * Special treatment for -1, which is not real cpu number,
 76		 * and we need to use (int) -1 to initialize map[i],
 77		 * otherwise it would become 65535.
 78		 */
 79		if (data->cpus_data.cpu[i] == (u16) -1) {
 80			RC_CHK_ACCESS(map)->map[i].cpu = -1;
 81		} else if (data->cpus_data.cpu[i] < INT16_MAX) {
 82			RC_CHK_ACCESS(map)->map[i].cpu = (int16_t) data->cpus_data.cpu[i];
 83		} else {
 84			pr_err("Invalid cpumap entry %u\n", data->cpus_data.cpu[i]);
 85			perf_cpu_map__put(map);
 86			return NULL;
 87		}
 88	}
 89
 90	return map;
 91}
 92
 93static struct perf_cpu_map *cpu_map__from_mask(const struct perf_record_cpu_map_data *data)
 94{
 95	DECLARE_BITMAP(local_copy, 64);
 96	int weight = 0, mask_nr = data->mask32_data.nr;
 97	struct perf_cpu_map *map;
 98
 99	for (int i = 0; i < mask_nr; i++) {
100		perf_record_cpu_map_data__read_one_mask(data, i, local_copy);
101		weight += bitmap_weight(local_copy, 64);
102	}
103
104	map = perf_cpu_map__empty_new(weight);
105	if (!map)
106		return NULL;
107
108	for (int i = 0, j = 0; i < mask_nr; i++) {
109		int cpus_per_i = (i * data->mask32_data.long_size  * BITS_PER_BYTE);
110		int cpu;
111
112		perf_record_cpu_map_data__read_one_mask(data, i, local_copy);
113		for_each_set_bit(cpu, local_copy, 64) {
114			if (cpu + cpus_per_i < INT16_MAX) {
115				RC_CHK_ACCESS(map)->map[j++].cpu = cpu + cpus_per_i;
116			} else {
117				pr_err("Invalid cpumap entry %d\n", cpu + cpus_per_i);
118				perf_cpu_map__put(map);
119				return NULL;
120			}
121		}
122	}
123	return map;
124
125}
126
127static struct perf_cpu_map *cpu_map__from_range(const struct perf_record_cpu_map_data *data)
128{
129	struct perf_cpu_map *map;
130	unsigned int i = 0;
131
132	map = perf_cpu_map__empty_new(data->range_cpu_data.end_cpu -
133				data->range_cpu_data.start_cpu + 1 + data->range_cpu_data.any_cpu);
134	if (!map)
135		return NULL;
136
137	if (data->range_cpu_data.any_cpu)
138		RC_CHK_ACCESS(map)->map[i++].cpu = -1;
139
140	for (int cpu = data->range_cpu_data.start_cpu; cpu <= data->range_cpu_data.end_cpu;
141	     i++, cpu++) {
142		if (cpu < INT16_MAX) {
143			RC_CHK_ACCESS(map)->map[i].cpu = cpu;
144		} else {
145			pr_err("Invalid cpumap entry %d\n", cpu);
146			perf_cpu_map__put(map);
147			return NULL;
148		}
149	}
150
151	return map;
152}
153
154struct perf_cpu_map *cpu_map__new_data(const struct perf_record_cpu_map_data *data)
155{
156	switch (data->type) {
157	case PERF_CPU_MAP__CPUS:
158		return cpu_map__from_entries(data);
159	case PERF_CPU_MAP__MASK:
160		return cpu_map__from_mask(data);
161	case PERF_CPU_MAP__RANGE_CPUS:
162		return cpu_map__from_range(data);
163	default:
164		pr_err("cpu_map__new_data unknown type %d\n", data->type);
165		return NULL;
166	}
167}
168
169size_t cpu_map__fprintf(struct perf_cpu_map *map, FILE *fp)
170{
171#define BUFSIZE 1024
172	char buf[BUFSIZE];
173
174	cpu_map__snprint(map, buf, sizeof(buf));
175	return fprintf(fp, "%s\n", buf);
176#undef BUFSIZE
177}
178
179struct perf_cpu_map *perf_cpu_map__empty_new(int nr)
180{
181	struct perf_cpu_map *cpus = perf_cpu_map__alloc(nr);
182
183	if (cpus != NULL) {
184		for (int i = 0; i < nr; i++)
185			RC_CHK_ACCESS(cpus)->map[i].cpu = -1;
186	}
187
188	return cpus;
189}
190
191struct cpu_aggr_map *cpu_aggr_map__empty_new(int nr)
192{
193	struct cpu_aggr_map *cpus = malloc(sizeof(*cpus) + sizeof(struct aggr_cpu_id) * nr);
194
195	if (cpus != NULL) {
196		int i;
197
198		cpus->nr = nr;
199		for (i = 0; i < nr; i++)
200			cpus->map[i] = aggr_cpu_id__empty();
201	}
202
203	return cpus;
204}
205
206static int cpu__get_topology_int(int cpu, const char *name, int *value)
207{
208	char path[PATH_MAX];
209
210	snprintf(path, PATH_MAX,
211		"devices/system/cpu/cpu%d/topology/%s", cpu, name);
212
213	return sysfs__read_int(path, value);
214}
215
216int cpu__get_socket_id(struct perf_cpu cpu)
217{
218	int value, ret = cpu__get_topology_int(cpu.cpu, "physical_package_id", &value);
219	return ret ?: value;
220}
221
222struct aggr_cpu_id aggr_cpu_id__socket(struct perf_cpu cpu, void *data __maybe_unused)
223{
224	struct aggr_cpu_id id = aggr_cpu_id__empty();
225
226	id.socket = cpu__get_socket_id(cpu);
227	return id;
228}
229
230static int aggr_cpu_id__cmp(const void *a_pointer, const void *b_pointer)
231{
232	struct aggr_cpu_id *a = (struct aggr_cpu_id *)a_pointer;
233	struct aggr_cpu_id *b = (struct aggr_cpu_id *)b_pointer;
234
235	if (a->node != b->node)
236		return a->node - b->node;
237	else if (a->socket != b->socket)
238		return a->socket - b->socket;
239	else if (a->die != b->die)
240		return a->die - b->die;
241	else if (a->cluster != b->cluster)
242		return a->cluster - b->cluster;
243	else if (a->cache_lvl != b->cache_lvl)
244		return a->cache_lvl - b->cache_lvl;
245	else if (a->cache != b->cache)
246		return a->cache - b->cache;
247	else if (a->core != b->core)
248		return a->core - b->core;
249	else
250		return a->thread_idx - b->thread_idx;
251}
252
253struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
254				       aggr_cpu_id_get_t get_id,
255				       void *data, bool needs_sort)
256{
257	int idx;
258	struct perf_cpu cpu;
259	struct cpu_aggr_map *c = cpu_aggr_map__empty_new(perf_cpu_map__nr(cpus));
260
261	if (!c)
262		return NULL;
263
264	/* Reset size as it may only be partially filled */
265	c->nr = 0;
266
267	perf_cpu_map__for_each_cpu(cpu, idx, cpus) {
268		bool duplicate = false;
269		struct aggr_cpu_id cpu_id = get_id(cpu, data);
270
271		for (int j = 0; j < c->nr; j++) {
272			if (aggr_cpu_id__equal(&cpu_id, &c->map[j])) {
273				duplicate = true;
274				break;
275			}
276		}
277		if (!duplicate) {
278			c->map[c->nr] = cpu_id;
279			c->nr++;
280		}
281	}
282	/* Trim. */
283	if (c->nr != perf_cpu_map__nr(cpus)) {
284		struct cpu_aggr_map *trimmed_c =
285			realloc(c,
286				sizeof(struct cpu_aggr_map) + sizeof(struct aggr_cpu_id) * c->nr);
287
288		if (trimmed_c)
289			c = trimmed_c;
290	}
291
292	/* ensure we process id in increasing order */
293	if (needs_sort)
294		qsort(c->map, c->nr, sizeof(struct aggr_cpu_id), aggr_cpu_id__cmp);
295
296	return c;
297
298}
299
300int cpu__get_die_id(struct perf_cpu cpu)
301{
302	int value, ret = cpu__get_topology_int(cpu.cpu, "die_id", &value);
303
304	return ret ?: value;
305}
306
307struct aggr_cpu_id aggr_cpu_id__die(struct perf_cpu cpu, void *data)
308{
309	struct aggr_cpu_id id;
310	int die;
311
312	die = cpu__get_die_id(cpu);
313	/* There is no die_id on legacy system. */
314	if (die < 0)
315		die = 0;
316
317	/*
318	 * die_id is relative to socket, so start
319	 * with the socket ID and then add die to
320	 * make a unique ID.
321	 */
322	id = aggr_cpu_id__socket(cpu, data);
323	if (aggr_cpu_id__is_empty(&id))
324		return id;
325
326	id.die = die;
327	return id;
328}
329
330int cpu__get_cluster_id(struct perf_cpu cpu)
331{
332	int value, ret = cpu__get_topology_int(cpu.cpu, "cluster_id", &value);
333
334	return ret ?: value;
335}
336
337struct aggr_cpu_id aggr_cpu_id__cluster(struct perf_cpu cpu, void *data)
338{
339	int cluster = cpu__get_cluster_id(cpu);
340	struct aggr_cpu_id id;
341
342	/* There is no cluster_id on legacy system. */
343	if (cluster < 0)
344		cluster = 0;
345
346	id = aggr_cpu_id__die(cpu, data);
347	if (aggr_cpu_id__is_empty(&id))
348		return id;
349
350	id.cluster = cluster;
351	return id;
352}
353
354int cpu__get_core_id(struct perf_cpu cpu)
355{
356	int value, ret = cpu__get_topology_int(cpu.cpu, "core_id", &value);
357	return ret ?: value;
358}
359
360struct aggr_cpu_id aggr_cpu_id__core(struct perf_cpu cpu, void *data)
361{
362	struct aggr_cpu_id id;
363	int core = cpu__get_core_id(cpu);
364
365	/* aggr_cpu_id__die returns a struct with socket die, and cluster set. */
366	id = aggr_cpu_id__cluster(cpu, data);
367	if (aggr_cpu_id__is_empty(&id))
368		return id;
369
370	/*
371	 * core_id is relative to socket and die, we need a global id.
372	 * So we combine the result from cpu_map__get_die with the core id
373	 */
374	id.core = core;
375	return id;
376
377}
378
379struct aggr_cpu_id aggr_cpu_id__cpu(struct perf_cpu cpu, void *data)
380{
381	struct aggr_cpu_id id;
382
383	/* aggr_cpu_id__core returns a struct with socket, die and core set. */
384	id = aggr_cpu_id__core(cpu, data);
385	if (aggr_cpu_id__is_empty(&id))
386		return id;
387
388	id.cpu = cpu;
389	return id;
390
391}
392
393struct aggr_cpu_id aggr_cpu_id__node(struct perf_cpu cpu, void *data __maybe_unused)
394{
395	struct aggr_cpu_id id = aggr_cpu_id__empty();
396
397	id.node = cpu__get_node(cpu);
398	return id;
399}
400
401struct aggr_cpu_id aggr_cpu_id__global(struct perf_cpu cpu, void *data __maybe_unused)
402{
403	struct aggr_cpu_id id = aggr_cpu_id__empty();
404
405	/* it always aggregates to the cpu 0 */
406	cpu.cpu = 0;
407	id.cpu = cpu;
408	return id;
409}
410
411/* setup simple routines to easily access node numbers given a cpu number */
412static int get_max_num(char *path, int *max)
413{
414	size_t num;
415	char *buf;
416	int err = 0;
417
418	if (filename__read_str(path, &buf, &num))
419		return -1;
420
421	buf[num] = '\0';
422
423	/* start on the right, to find highest node num */
424	while (--num) {
425		if ((buf[num] == ',') || (buf[num] == '-')) {
426			num++;
427			break;
428		}
429	}
430	if (sscanf(&buf[num], "%d", max) < 1) {
431		err = -1;
432		goto out;
433	}
434
435	/* convert from 0-based to 1-based */
436	(*max)++;
437
438out:
439	free(buf);
440	return err;
441}
442
443/* Determine highest possible cpu in the system for sparse allocation */
444static void set_max_cpu_num(void)
445{
446	const char *mnt;
447	char path[PATH_MAX];
448	int max, ret = -1;
449
450	/* set up default */
451	max_cpu_num.cpu = 4096;
452	max_present_cpu_num.cpu = 4096;
453
454	mnt = sysfs__mountpoint();
455	if (!mnt)
456		goto out;
457
458	/* get the highest possible cpu number for a sparse allocation */
459	ret = snprintf(path, PATH_MAX, "%s/devices/system/cpu/possible", mnt);
460	if (ret >= PATH_MAX) {
461		pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
462		goto out;
463	}
464
465	ret = get_max_num(path, &max);
466	if (ret)
467		goto out;
468
469	max_cpu_num.cpu = max;
470
471	/* get the highest present cpu number for a sparse allocation */
472	ret = snprintf(path, PATH_MAX, "%s/devices/system/cpu/present", mnt);
473	if (ret >= PATH_MAX) {
474		pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
475		goto out;
476	}
477
478	ret = get_max_num(path, &max);
479
480	if (!ret && max > INT16_MAX) {
481		pr_err("Read out of bounds max cpus of %d\n", max);
482		ret = -1;
483	}
484	if (!ret)
485		max_present_cpu_num.cpu = (int16_t)max;
486out:
487	if (ret)
488		pr_err("Failed to read max cpus, using default of %d\n", max_cpu_num.cpu);
489}
490
491/* Determine highest possible node in the system for sparse allocation */
492static void set_max_node_num(void)
493{
494	const char *mnt;
495	char path[PATH_MAX];
496	int ret = -1;
497
498	/* set up default */
499	max_node_num = 8;
500
501	mnt = sysfs__mountpoint();
502	if (!mnt)
503		goto out;
504
505	/* get the highest possible cpu number for a sparse allocation */
506	ret = snprintf(path, PATH_MAX, "%s/devices/system/node/possible", mnt);
507	if (ret >= PATH_MAX) {
508		pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
509		goto out;
510	}
511
512	ret = get_max_num(path, &max_node_num);
513
514out:
515	if (ret)
516		pr_err("Failed to read max nodes, using default of %d\n", max_node_num);
517}
518
519int cpu__max_node(void)
520{
521	if (unlikely(!max_node_num))
522		set_max_node_num();
523
524	return max_node_num;
525}
526
527struct perf_cpu cpu__max_cpu(void)
528{
529	if (unlikely(!max_cpu_num.cpu))
530		set_max_cpu_num();
531
532	return max_cpu_num;
533}
534
535struct perf_cpu cpu__max_present_cpu(void)
536{
537	if (unlikely(!max_present_cpu_num.cpu))
538		set_max_cpu_num();
539
540	return max_present_cpu_num;
541}
542
543
544int cpu__get_node(struct perf_cpu cpu)
545{
546	if (unlikely(cpunode_map == NULL)) {
547		pr_debug("cpu_map not initialized\n");
548		return -1;
549	}
550
551	return cpunode_map[cpu.cpu];
552}
553
554static int init_cpunode_map(void)
555{
556	int i;
557
558	set_max_cpu_num();
559	set_max_node_num();
560
561	cpunode_map = calloc(max_cpu_num.cpu, sizeof(int));
562	if (!cpunode_map) {
563		pr_err("%s: calloc failed\n", __func__);
564		return -1;
565	}
566
567	for (i = 0; i < max_cpu_num.cpu; i++)
568		cpunode_map[i] = -1;
569
570	return 0;
571}
572
573int cpu__setup_cpunode_map(void)
574{
575	struct dirent *dent1, *dent2;
576	DIR *dir1, *dir2;
577	unsigned int cpu, mem;
578	char buf[PATH_MAX];
579	char path[PATH_MAX];
580	const char *mnt;
581	int n;
582
583	/* initialize globals */
584	if (init_cpunode_map())
585		return -1;
586
587	mnt = sysfs__mountpoint();
588	if (!mnt)
589		return 0;
590
591	n = snprintf(path, PATH_MAX, "%s/devices/system/node", mnt);
592	if (n >= PATH_MAX) {
593		pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
594		return -1;
595	}
596
597	dir1 = opendir(path);
598	if (!dir1)
599		return 0;
600
601	/* walk tree and setup map */
602	while ((dent1 = readdir(dir1)) != NULL) {
603		if (dent1->d_type != DT_DIR || sscanf(dent1->d_name, "node%u", &mem) < 1)
604			continue;
605
606		n = snprintf(buf, PATH_MAX, "%s/%s", path, dent1->d_name);
607		if (n >= PATH_MAX) {
608			pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
609			continue;
610		}
611
612		dir2 = opendir(buf);
613		if (!dir2)
614			continue;
615		while ((dent2 = readdir(dir2)) != NULL) {
616			if (dent2->d_type != DT_LNK || sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
617				continue;
618			cpunode_map[cpu] = mem;
619		}
620		closedir(dir2);
621	}
622	closedir(dir1);
623	return 0;
624}
625
626size_t cpu_map__snprint(struct perf_cpu_map *map, char *buf, size_t size)
627{
628	int i, start = -1;
629	bool first = true;
630	size_t ret = 0;
631
632#define COMMA first ? "" : ","
633
634	for (i = 0; i < perf_cpu_map__nr(map) + 1; i++) {
635		struct perf_cpu cpu = { .cpu = INT16_MAX };
636		bool last = i == perf_cpu_map__nr(map);
637
638		if (!last)
639			cpu = perf_cpu_map__cpu(map, i);
640
641		if (start == -1) {
642			start = i;
643			if (last) {
644				ret += snprintf(buf + ret, size - ret,
645						"%s%d", COMMA,
646						perf_cpu_map__cpu(map, i).cpu);
647			}
648		} else if (((i - start) != (cpu.cpu - perf_cpu_map__cpu(map, start).cpu)) || last) {
649			int end = i - 1;
650
651			if (start == end) {
652				ret += snprintf(buf + ret, size - ret,
653						"%s%d", COMMA,
654						perf_cpu_map__cpu(map, start).cpu);
655			} else {
656				ret += snprintf(buf + ret, size - ret,
657						"%s%d-%d", COMMA,
658						perf_cpu_map__cpu(map, start).cpu, perf_cpu_map__cpu(map, end).cpu);
659			}
660			first = false;
661			start = i;
662		}
663	}
664
665#undef COMMA
666
667	pr_debug2("cpumask list: %s\n", buf);
668	return ret;
669}
670
671static char hex_char(unsigned char val)
672{
673	if (val < 10)
674		return val + '0';
675	if (val < 16)
676		return val - 10 + 'a';
677	return '?';
678}
679
680size_t cpu_map__snprint_mask(struct perf_cpu_map *map, char *buf, size_t size)
681{
682	int idx;
683	char *ptr = buf;
684	unsigned char *bitmap;
685	struct perf_cpu c, last_cpu = perf_cpu_map__max(map);
686
687	if (buf == NULL || size == 0)
688		return 0;
689
690	if (last_cpu.cpu < 0) {
691		buf[0] = '\0';
692		return 0;
693	}
694
695	bitmap = zalloc(last_cpu.cpu / 8 + 1);
696	if (bitmap == NULL) {
697		buf[0] = '\0';
698		return 0;
699	}
700
701	perf_cpu_map__for_each_cpu_skip_any(c, idx, map)
702		bitmap[c.cpu / 8] |= 1 << (c.cpu % 8);
703
704	for (int cpu = last_cpu.cpu / 4 * 4; cpu >= 0; cpu -= 4) {
705		unsigned char bits = bitmap[cpu / 8];
706
707		if (cpu % 8)
708			bits >>= 4;
709		else
710			bits &= 0xf;
711
712		*ptr++ = hex_char(bits);
713		if ((cpu % 32) == 0 && cpu > 0)
714			*ptr++ = ',';
715	}
716	*ptr = '\0';
717	free(bitmap);
718
719	buf[size - 1] = '\0';
720	return ptr - buf;
721}
722
723struct perf_cpu_map *cpu_map__online(void) /* thread unsafe */
724{
725	static struct perf_cpu_map *online;
726
727	if (!online)
728		online = perf_cpu_map__new_online_cpus(); /* from /sys/devices/system/cpu/online */
729
730	return perf_cpu_map__get(online);
731}
732
733bool aggr_cpu_id__equal(const struct aggr_cpu_id *a, const struct aggr_cpu_id *b)
734{
735	return a->thread_idx == b->thread_idx &&
736		a->node == b->node &&
737		a->socket == b->socket &&
738		a->die == b->die &&
739		a->cluster == b->cluster &&
740		a->cache_lvl == b->cache_lvl &&
741		a->cache == b->cache &&
742		a->core == b->core &&
743		a->cpu.cpu == b->cpu.cpu;
744}
745
746bool aggr_cpu_id__is_empty(const struct aggr_cpu_id *a)
747{
748	return a->thread_idx == -1 &&
749		a->node == -1 &&
750		a->socket == -1 &&
751		a->die == -1 &&
752		a->cluster == -1 &&
753		a->cache_lvl == -1 &&
754		a->cache == -1 &&
755		a->core == -1 &&
756		a->cpu.cpu == -1;
757}
758
759struct aggr_cpu_id aggr_cpu_id__empty(void)
760{
761	struct aggr_cpu_id ret = {
762		.thread_idx = -1,
763		.node = -1,
764		.socket = -1,
765		.die = -1,
766		.cluster = -1,
767		.cache_lvl = -1,
768		.cache = -1,
769		.core = -1,
770		.cpu = (struct perf_cpu){ .cpu = -1 },
771	};
772	return ret;
773}