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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/perf/arm-ccn.c
....@@ -1,12 +1,5 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
2
- * This program is free software; you can redistribute it and/or modify
3
- * it under the terms of the GNU General Public License version 2 as
4
- * published by the Free Software Foundation.
5
- *
6
- * This program is distributed in the hope that it will be useful,
7
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
8
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9
- * GNU General Public License for more details.
103  *
114  * Copyright (C) 2014 ARM Limited
125  */
....@@ -167,7 +160,7 @@
167160 
168161 	struct hrtimer hrtimer;
169162 
170
-	cpumask_t cpu;
163
+	unsigned int cpu;
171164 	struct hlist_node node;
172165 
173166 	struct pmu pmu;
....@@ -335,15 +328,15 @@
335328 			struct arm_ccn_pmu_event, attr);
336329 	ssize_t res;
337330 
338
-	res = snprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
331
+	res = scnprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
339332 	if (event->event)
340
-		res += snprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
333
+		res += scnprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
341334 				event->event);
342335 	if (event->def)
343
-		res += snprintf(buf + res, PAGE_SIZE - res, ",%s",
336
+		res += scnprintf(buf + res, PAGE_SIZE - res, ",%s",
344337 				event->def);
345338 	if (event->mask)
346
-		res += snprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
339
+		res += scnprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
347340 				event->mask);
348341 
349342 	/* Arguments required by an event */
....@@ -351,25 +344,25 @@
351344 	case CCN_TYPE_CYCLES:
352345 		break;
353346 	case CCN_TYPE_XP:
354
-		res += snprintf(buf + res, PAGE_SIZE - res,
347
+		res += scnprintf(buf + res, PAGE_SIZE - res,
355348 				",xp=?,vc=?");
356349 		if (event->event == CCN_EVENT_WATCHPOINT)
357
-			res += snprintf(buf + res, PAGE_SIZE - res,
350
+			res += scnprintf(buf + res, PAGE_SIZE - res,
358351 					",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?");
359352 		else
360
-			res += snprintf(buf + res, PAGE_SIZE - res,
353
+			res += scnprintf(buf + res, PAGE_SIZE - res,
361354 					",bus=?");
362355 
363356 		break;
364357 	case CCN_TYPE_MN:
365
-		res += snprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
358
+		res += scnprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
366359 		break;
367360 	default:
368
-		res += snprintf(buf + res, PAGE_SIZE - res, ",node=?");
361
+		res += scnprintf(buf + res, PAGE_SIZE - res, ",node=?");
369362 		break;
370363 	}
371364 
372
-	res += snprintf(buf + res, PAGE_SIZE - res, "\n");
365
+	res += scnprintf(buf + res, PAGE_SIZE - res, "\n");
373366 
374367 	return res;
375368 }
....@@ -559,7 +552,7 @@
559552 {
560553 	struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
561554 
562
-	return cpumap_print_to_pagebuf(true, buf, &ccn->dt.cpu);
555
+	return cpumap_print_to_pagebuf(true, buf, cpumask_of(ccn->dt.cpu));
563556 }
564557 
565558 static struct device_attribute arm_ccn_pmu_cpumask_attr =
....@@ -741,10 +734,7 @@
741734 		return -EOPNOTSUPP;
742735 	}
743736 
744
-	if (has_branch_stack(event) || event->attr.exclude_user ||
745
-			event->attr.exclude_kernel || event->attr.exclude_hv ||
746
-			event->attr.exclude_idle || event->attr.exclude_host ||
747
-			event->attr.exclude_guest) {
737
+	if (has_branch_stack(event)) {
748738 		dev_dbg(ccn->dev, "Can't exclude execution levels!\n");
749739 		return -EINVAL;
750740 	}
....@@ -762,7 +752,7 @@
762752 	 * mitigate this, we enforce CPU assignment to one, selected
763753 	 * processor (the one described in the "cpumask" attribute).
764754 	 */
765
-	event->cpu = cpumask_first(&ccn->dt.cpu);
755
+	event->cpu = ccn->dt.cpu;
766756 
767757 	node_xp = CCN_CONFIG_NODE(event->attr.config);
768758 	type = CCN_CONFIG_TYPE(event->attr.config);
....@@ -1218,15 +1208,15 @@
12181208 	struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt);
12191209 	unsigned int target;
12201210 
1221
-	if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu))
1211
+	if (cpu != dt->cpu)
12221212 		return 0;
12231213 	target = cpumask_any_but(cpu_online_mask, cpu);
12241214 	if (target >= nr_cpu_ids)
12251215 		return 0;
12261216 	perf_pmu_migrate_context(&dt->pmu, cpu, target);
1227
-	cpumask_set_cpu(target, &dt->cpu);
1217
+	dt->cpu = target;
12281218 	if (ccn->irq)
1229
-		WARN_ON(irq_set_affinity_hint(ccn->irq, &dt->cpu) != 0);
1219
+		WARN_ON(irq_set_affinity_hint(ccn->irq, cpumask_of(dt->cpu)));
12301220 	return 0;
12311221 }
12321222 
....@@ -1290,6 +1280,7 @@
12901280 		.read = arm_ccn_pmu_event_read,
12911281 		.pmu_enable = arm_ccn_pmu_enable,
12921282 		.pmu_disable = arm_ccn_pmu_disable,
1283
+		.capabilities = PERF_PMU_CAP_NO_EXCLUDE,
12931284 	};
12941285 
12951286 	/* No overflow interrupt? Have to use a timer instead. */
....@@ -1301,29 +1292,30 @@
13011292 	}
13021293 
13031294 	/* Pick one CPU which we will use to collect data from CCN... */
1304
-	cpumask_set_cpu(get_cpu(), &ccn->dt.cpu);
1295
+	ccn->dt.cpu = raw_smp_processor_id();
13051296 
13061297 	/* Also make sure that the overflow interrupt is handled by this CPU */
13071298 	if (ccn->irq) {
1308
-		err = irq_set_affinity_hint(ccn->irq, &ccn->dt.cpu);
1299
+		err = irq_set_affinity_hint(ccn->irq, cpumask_of(ccn->dt.cpu));
13091300 		if (err) {
13101301 			dev_err(ccn->dev, "Failed to set interrupt affinity!\n");
13111302 			goto error_set_affinity;
13121303 		}
13131304 	}
13141305 
1306
+	cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1307
+					 &ccn->dt.node);
1308
+
13151309 	err = perf_pmu_register(&ccn->dt.pmu, name, -1);
13161310 	if (err)
13171311 		goto error_pmu_register;
13181312 
1319
-	cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1320
-					 &ccn->dt.node);
1321
-	put_cpu();
13221313 	return 0;
13231314 
13241315 error_pmu_register:
1316
+	cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1317
+					    &ccn->dt.node);
13251318 error_set_affinity:
1326
-	put_cpu();
13271319 error_choose_name:
13281320 	ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
13291321 	for (i = 0; i < ccn->num_xps; i++)
....@@ -1412,7 +1404,7 @@
14121404 		break;
14131405 	case CCN_TYPE_SBAS:
14141406 		ccn->sbas_present = 1;
1415
-		/* Fall-through */
1407
+		fallthrough;
14161408 	default:
14171409 		component = &ccn->node[id];
14181410 		break;
....@@ -1485,8 +1477,7 @@
14851477 	ccn->dev = &pdev->dev;
14861478 	platform_set_drvdata(pdev, ccn);
14871479 
1488
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1489
-	ccn->base = devm_ioremap_resource(ccn->dev, res);
1480
+	ccn->base = devm_platform_ioremap_resource(pdev, 0);
14901481 	if (IS_ERR(ccn->base))
14911482 		return PTR_ERR(ccn->base);
14921483 
....@@ -1545,6 +1536,7 @@
15451536 static const struct of_device_id arm_ccn_match[] = {
15461537 	{ .compatible = "arm,ccn-502", },
15471538 	{ .compatible = "arm,ccn-504", },
1539
+	{ .compatible = "arm,ccn-512", },
15481540 	{},
15491541 };
15501542 MODULE_DEVICE_TABLE(of, arm_ccn_match);
....@@ -1553,6 +1545,7 @@
15531545 	.driver = {
15541546 		.name = "arm-ccn",
15551547 		.of_match_table = arm_ccn_match,
1548
+		.suppress_bind_attrs = true,
15561549 	},
15571550 	.probe = arm_ccn_probe,
15581551 	.remove = arm_ccn_remove,