16aec1ad7SBorislav Petkov /* 2940b2f2fSBorislav Petkov * Support cstate residency counters 36aec1ad7SBorislav Petkov * 46aec1ad7SBorislav Petkov * Copyright (C) 2015, Intel Corp. 56aec1ad7SBorislav Petkov * Author: Kan Liang (kan.liang@intel.com) 66aec1ad7SBorislav Petkov * 76aec1ad7SBorislav Petkov * This library is free software; you can redistribute it and/or 86aec1ad7SBorislav Petkov * modify it under the terms of the GNU Library General Public 96aec1ad7SBorislav Petkov * License as published by the Free Software Foundation; either 106aec1ad7SBorislav Petkov * version 2 of the License, or (at your option) any later version. 116aec1ad7SBorislav Petkov * 126aec1ad7SBorislav Petkov * This library is distributed in the hope that it will be useful, 136aec1ad7SBorislav Petkov * but WITHOUT ANY WARRANTY; without even the implied warranty of 146aec1ad7SBorislav Petkov * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 156aec1ad7SBorislav Petkov * Library General Public License for more details. 166aec1ad7SBorislav Petkov * 176aec1ad7SBorislav Petkov */ 186aec1ad7SBorislav Petkov 196aec1ad7SBorislav Petkov /* 206aec1ad7SBorislav Petkov * This file export cstate related free running (read-only) counters 216aec1ad7SBorislav Petkov * for perf. These counters may be use simultaneously by other tools, 226aec1ad7SBorislav Petkov * such as turbostat. However, it still make sense to implement them 236aec1ad7SBorislav Petkov * in perf. Because we can conveniently collect them together with 246aec1ad7SBorislav Petkov * other events, and allow to use them from tools without special MSR 256aec1ad7SBorislav Petkov * access code. 266aec1ad7SBorislav Petkov * 276aec1ad7SBorislav Petkov * The events only support system-wide mode counting. There is no 286aec1ad7SBorislav Petkov * sampling support because it is not supported by the hardware. 296aec1ad7SBorislav Petkov * 306aec1ad7SBorislav Petkov * According to counters' scope and category, two PMUs are registered 316aec1ad7SBorislav Petkov * with the perf_event core subsystem. 326aec1ad7SBorislav Petkov * - 'cstate_core': The counter is available for each physical core. 336aec1ad7SBorislav Petkov * The counters include CORE_C*_RESIDENCY. 346aec1ad7SBorislav Petkov * - 'cstate_pkg': The counter is available for each physical package. 356aec1ad7SBorislav Petkov * The counters include PKG_C*_RESIDENCY. 366aec1ad7SBorislav Petkov * 376aec1ad7SBorislav Petkov * All of these counters are specified in the Intel® 64 and IA-32 386aec1ad7SBorislav Petkov * Architectures Software Developer.s Manual Vol3b. 396aec1ad7SBorislav Petkov * 406aec1ad7SBorislav Petkov * Model specific counters: 416aec1ad7SBorislav Petkov * MSR_CORE_C1_RES: CORE C1 Residency Counter 426aec1ad7SBorislav Petkov * perf code: 0x00 431159e094SHarry Pan * Available model: SLM,AMT,GLM,CNL 446aec1ad7SBorislav Petkov * Scope: Core (each processor core has a MSR) 456aec1ad7SBorislav Petkov * MSR_CORE_C3_RESIDENCY: CORE C3 Residency Counter 466aec1ad7SBorislav Petkov * perf code: 0x01 471159e094SHarry Pan * Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,GLM, 481159e094SHarry Pan CNL 496aec1ad7SBorislav Petkov * Scope: Core 506aec1ad7SBorislav Petkov * MSR_CORE_C6_RESIDENCY: CORE C6 Residency Counter 516aec1ad7SBorislav Petkov * perf code: 0x02 521159e094SHarry Pan * Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW, 531159e094SHarry Pan * SKL,KNL,GLM,CNL 546aec1ad7SBorislav Petkov * Scope: Core 556aec1ad7SBorislav Petkov * MSR_CORE_C7_RESIDENCY: CORE C7 Residency Counter 566aec1ad7SBorislav Petkov * perf code: 0x03 571159e094SHarry Pan * Available model: SNB,IVB,HSW,BDW,SKL,CNL 586aec1ad7SBorislav Petkov * Scope: Core 596aec1ad7SBorislav Petkov * MSR_PKG_C2_RESIDENCY: Package C2 Residency Counter. 606aec1ad7SBorislav Petkov * perf code: 0x00 611159e094SHarry Pan * Available model: SNB,IVB,HSW,BDW,SKL,KNL,GLM,CNL 626aec1ad7SBorislav Petkov * Scope: Package (physical package) 636aec1ad7SBorislav Petkov * MSR_PKG_C3_RESIDENCY: Package C3 Residency Counter. 646aec1ad7SBorislav Petkov * perf code: 0x01 651159e094SHarry Pan * Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,KNL, 661159e094SHarry Pan * GLM,CNL 676aec1ad7SBorislav Petkov * Scope: Package (physical package) 686aec1ad7SBorislav Petkov * MSR_PKG_C6_RESIDENCY: Package C6 Residency Counter. 696aec1ad7SBorislav Petkov * perf code: 0x02 70889882bcSLukasz Odzioba * Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW 711159e094SHarry Pan * SKL,KNL,GLM,CNL 726aec1ad7SBorislav Petkov * Scope: Package (physical package) 736aec1ad7SBorislav Petkov * MSR_PKG_C7_RESIDENCY: Package C7 Residency Counter. 746aec1ad7SBorislav Petkov * perf code: 0x03 751159e094SHarry Pan * Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,CNL 766aec1ad7SBorislav Petkov * Scope: Package (physical package) 776aec1ad7SBorislav Petkov * MSR_PKG_C8_RESIDENCY: Package C8 Residency Counter. 786aec1ad7SBorislav Petkov * perf code: 0x04 791159e094SHarry Pan * Available model: HSW ULT,CNL 806aec1ad7SBorislav Petkov * Scope: Package (physical package) 816aec1ad7SBorislav Petkov * MSR_PKG_C9_RESIDENCY: Package C9 Residency Counter. 826aec1ad7SBorislav Petkov * perf code: 0x05 831159e094SHarry Pan * Available model: HSW ULT,CNL 846aec1ad7SBorislav Petkov * Scope: Package (physical package) 856aec1ad7SBorislav Petkov * MSR_PKG_C10_RESIDENCY: Package C10 Residency Counter. 866aec1ad7SBorislav Petkov * perf code: 0x06 871159e094SHarry Pan * Available model: HSW ULT,GLM,CNL 886aec1ad7SBorislav Petkov * Scope: Package (physical package) 896aec1ad7SBorislav Petkov * 906aec1ad7SBorislav Petkov */ 916aec1ad7SBorislav Petkov 926aec1ad7SBorislav Petkov #include <linux/module.h> 936aec1ad7SBorislav Petkov #include <linux/slab.h> 946aec1ad7SBorislav Petkov #include <linux/perf_event.h> 956aec1ad7SBorislav Petkov #include <asm/cpu_device_id.h> 96bf4ad541SDave Hansen #include <asm/intel-family.h> 9727f6d22bSBorislav Petkov #include "../perf_event.h" 986aec1ad7SBorislav Petkov 99c7afba32SThomas Gleixner MODULE_LICENSE("GPL"); 100c7afba32SThomas Gleixner 1016aec1ad7SBorislav Petkov #define DEFINE_CSTATE_FORMAT_ATTR(_var, _name, _format) \ 1026aec1ad7SBorislav Petkov static ssize_t __cstate_##_var##_show(struct kobject *kobj, \ 1036aec1ad7SBorislav Petkov struct kobj_attribute *attr, \ 1046aec1ad7SBorislav Petkov char *page) \ 1056aec1ad7SBorislav Petkov { \ 1066aec1ad7SBorislav Petkov BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ 1076aec1ad7SBorislav Petkov return sprintf(page, _format "\n"); \ 1086aec1ad7SBorislav Petkov } \ 1096aec1ad7SBorislav Petkov static struct kobj_attribute format_attr_##_var = \ 1106aec1ad7SBorislav Petkov __ATTR(_name, 0444, __cstate_##_var##_show, NULL) 1116aec1ad7SBorislav Petkov 1126aec1ad7SBorislav Petkov static ssize_t cstate_get_attr_cpumask(struct device *dev, 1136aec1ad7SBorislav Petkov struct device_attribute *attr, 1146aec1ad7SBorislav Petkov char *buf); 1156aec1ad7SBorislav Petkov 116424646eeSThomas Gleixner /* Model -> events mapping */ 117424646eeSThomas Gleixner struct cstate_model { 118424646eeSThomas Gleixner unsigned long core_events; 119424646eeSThomas Gleixner unsigned long pkg_events; 120424646eeSThomas Gleixner unsigned long quirks; 121424646eeSThomas Gleixner }; 122424646eeSThomas Gleixner 123424646eeSThomas Gleixner /* Quirk flags */ 124424646eeSThomas Gleixner #define SLM_PKG_C6_USE_C7_MSR (1UL << 0) 125889882bcSLukasz Odzioba #define KNL_CORE_C6_MSR (1UL << 1) 126424646eeSThomas Gleixner 1276aec1ad7SBorislav Petkov struct perf_cstate_msr { 1286aec1ad7SBorislav Petkov u64 msr; 1296aec1ad7SBorislav Petkov struct perf_pmu_events_attr *attr; 1306aec1ad7SBorislav Petkov }; 1316aec1ad7SBorislav Petkov 1326aec1ad7SBorislav Petkov 1336aec1ad7SBorislav Petkov /* cstate_core PMU */ 1346aec1ad7SBorislav Petkov static struct pmu cstate_core_pmu; 1356aec1ad7SBorislav Petkov static bool has_cstate_core; 1366aec1ad7SBorislav Petkov 137424646eeSThomas Gleixner enum perf_cstate_core_events { 1386aec1ad7SBorislav Petkov PERF_CSTATE_CORE_C1_RES = 0, 1396aec1ad7SBorislav Petkov PERF_CSTATE_CORE_C3_RES, 1406aec1ad7SBorislav Petkov PERF_CSTATE_CORE_C6_RES, 1416aec1ad7SBorislav Petkov PERF_CSTATE_CORE_C7_RES, 1426aec1ad7SBorislav Petkov 1436aec1ad7SBorislav Petkov PERF_CSTATE_CORE_EVENT_MAX, 1446aec1ad7SBorislav Petkov }; 1456aec1ad7SBorislav Petkov 1466aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c1-residency, evattr_cstate_core_c1, "event=0x00"); 1476aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c3-residency, evattr_cstate_core_c3, "event=0x01"); 1486aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c6-residency, evattr_cstate_core_c6, "event=0x02"); 1496aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c7-residency, evattr_cstate_core_c7, "event=0x03"); 1506aec1ad7SBorislav Petkov 1516aec1ad7SBorislav Petkov static struct perf_cstate_msr core_msr[] = { 152424646eeSThomas Gleixner [PERF_CSTATE_CORE_C1_RES] = { MSR_CORE_C1_RES, &evattr_cstate_core_c1 }, 153424646eeSThomas Gleixner [PERF_CSTATE_CORE_C3_RES] = { MSR_CORE_C3_RESIDENCY, &evattr_cstate_core_c3 }, 154424646eeSThomas Gleixner [PERF_CSTATE_CORE_C6_RES] = { MSR_CORE_C6_RESIDENCY, &evattr_cstate_core_c6 }, 155424646eeSThomas Gleixner [PERF_CSTATE_CORE_C7_RES] = { MSR_CORE_C7_RESIDENCY, &evattr_cstate_core_c7 }, 1566aec1ad7SBorislav Petkov }; 1576aec1ad7SBorislav Petkov 1586aec1ad7SBorislav Petkov static struct attribute *core_events_attrs[PERF_CSTATE_CORE_EVENT_MAX + 1] = { 1596aec1ad7SBorislav Petkov NULL, 1606aec1ad7SBorislav Petkov }; 1616aec1ad7SBorislav Petkov 1626aec1ad7SBorislav Petkov static struct attribute_group core_events_attr_group = { 1636aec1ad7SBorislav Petkov .name = "events", 1646aec1ad7SBorislav Petkov .attrs = core_events_attrs, 1656aec1ad7SBorislav Petkov }; 1666aec1ad7SBorislav Petkov 1676aec1ad7SBorislav Petkov DEFINE_CSTATE_FORMAT_ATTR(core_event, event, "config:0-63"); 1686aec1ad7SBorislav Petkov static struct attribute *core_format_attrs[] = { 1696aec1ad7SBorislav Petkov &format_attr_core_event.attr, 1706aec1ad7SBorislav Petkov NULL, 1716aec1ad7SBorislav Petkov }; 1726aec1ad7SBorislav Petkov 1736aec1ad7SBorislav Petkov static struct attribute_group core_format_attr_group = { 1746aec1ad7SBorislav Petkov .name = "format", 1756aec1ad7SBorislav Petkov .attrs = core_format_attrs, 1766aec1ad7SBorislav Petkov }; 1776aec1ad7SBorislav Petkov 1786aec1ad7SBorislav Petkov static cpumask_t cstate_core_cpu_mask; 1796aec1ad7SBorislav Petkov static DEVICE_ATTR(cpumask, S_IRUGO, cstate_get_attr_cpumask, NULL); 1806aec1ad7SBorislav Petkov 1816aec1ad7SBorislav Petkov static struct attribute *cstate_cpumask_attrs[] = { 1826aec1ad7SBorislav Petkov &dev_attr_cpumask.attr, 1836aec1ad7SBorislav Petkov NULL, 1846aec1ad7SBorislav Petkov }; 1856aec1ad7SBorislav Petkov 1866aec1ad7SBorislav Petkov static struct attribute_group cpumask_attr_group = { 1876aec1ad7SBorislav Petkov .attrs = cstate_cpumask_attrs, 1886aec1ad7SBorislav Petkov }; 1896aec1ad7SBorislav Petkov 1906aec1ad7SBorislav Petkov static const struct attribute_group *core_attr_groups[] = { 1916aec1ad7SBorislav Petkov &core_events_attr_group, 1926aec1ad7SBorislav Petkov &core_format_attr_group, 1936aec1ad7SBorislav Petkov &cpumask_attr_group, 1946aec1ad7SBorislav Petkov NULL, 1956aec1ad7SBorislav Petkov }; 1966aec1ad7SBorislav Petkov 1976aec1ad7SBorislav Petkov /* cstate_pkg PMU */ 1986aec1ad7SBorislav Petkov static struct pmu cstate_pkg_pmu; 1996aec1ad7SBorislav Petkov static bool has_cstate_pkg; 2006aec1ad7SBorislav Petkov 201424646eeSThomas Gleixner enum perf_cstate_pkg_events { 2026aec1ad7SBorislav Petkov PERF_CSTATE_PKG_C2_RES = 0, 2036aec1ad7SBorislav Petkov PERF_CSTATE_PKG_C3_RES, 2046aec1ad7SBorislav Petkov PERF_CSTATE_PKG_C6_RES, 2056aec1ad7SBorislav Petkov PERF_CSTATE_PKG_C7_RES, 2066aec1ad7SBorislav Petkov PERF_CSTATE_PKG_C8_RES, 2076aec1ad7SBorislav Petkov PERF_CSTATE_PKG_C9_RES, 2086aec1ad7SBorislav Petkov PERF_CSTATE_PKG_C10_RES, 2096aec1ad7SBorislav Petkov 2106aec1ad7SBorislav Petkov PERF_CSTATE_PKG_EVENT_MAX, 2116aec1ad7SBorislav Petkov }; 2126aec1ad7SBorislav Petkov 2136aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c2-residency, evattr_cstate_pkg_c2, "event=0x00"); 2146aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c3-residency, evattr_cstate_pkg_c3, "event=0x01"); 2156aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c6-residency, evattr_cstate_pkg_c6, "event=0x02"); 2166aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c7-residency, evattr_cstate_pkg_c7, "event=0x03"); 2176aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c8-residency, evattr_cstate_pkg_c8, "event=0x04"); 2186aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c9-residency, evattr_cstate_pkg_c9, "event=0x05"); 2196aec1ad7SBorislav Petkov PMU_EVENT_ATTR_STRING(c10-residency, evattr_cstate_pkg_c10, "event=0x06"); 2206aec1ad7SBorislav Petkov 2216aec1ad7SBorislav Petkov static struct perf_cstate_msr pkg_msr[] = { 222424646eeSThomas Gleixner [PERF_CSTATE_PKG_C2_RES] = { MSR_PKG_C2_RESIDENCY, &evattr_cstate_pkg_c2 }, 223424646eeSThomas Gleixner [PERF_CSTATE_PKG_C3_RES] = { MSR_PKG_C3_RESIDENCY, &evattr_cstate_pkg_c3 }, 224424646eeSThomas Gleixner [PERF_CSTATE_PKG_C6_RES] = { MSR_PKG_C6_RESIDENCY, &evattr_cstate_pkg_c6 }, 225424646eeSThomas Gleixner [PERF_CSTATE_PKG_C7_RES] = { MSR_PKG_C7_RESIDENCY, &evattr_cstate_pkg_c7 }, 226424646eeSThomas Gleixner [PERF_CSTATE_PKG_C8_RES] = { MSR_PKG_C8_RESIDENCY, &evattr_cstate_pkg_c8 }, 227424646eeSThomas Gleixner [PERF_CSTATE_PKG_C9_RES] = { MSR_PKG_C9_RESIDENCY, &evattr_cstate_pkg_c9 }, 228424646eeSThomas Gleixner [PERF_CSTATE_PKG_C10_RES] = { MSR_PKG_C10_RESIDENCY, &evattr_cstate_pkg_c10 }, 2296aec1ad7SBorislav Petkov }; 2306aec1ad7SBorislav Petkov 2316aec1ad7SBorislav Petkov static struct attribute *pkg_events_attrs[PERF_CSTATE_PKG_EVENT_MAX + 1] = { 2326aec1ad7SBorislav Petkov NULL, 2336aec1ad7SBorislav Petkov }; 2346aec1ad7SBorislav Petkov 2356aec1ad7SBorislav Petkov static struct attribute_group pkg_events_attr_group = { 2366aec1ad7SBorislav Petkov .name = "events", 2376aec1ad7SBorislav Petkov .attrs = pkg_events_attrs, 2386aec1ad7SBorislav Petkov }; 2396aec1ad7SBorislav Petkov 2406aec1ad7SBorislav Petkov DEFINE_CSTATE_FORMAT_ATTR(pkg_event, event, "config:0-63"); 2416aec1ad7SBorislav Petkov static struct attribute *pkg_format_attrs[] = { 2426aec1ad7SBorislav Petkov &format_attr_pkg_event.attr, 2436aec1ad7SBorislav Petkov NULL, 2446aec1ad7SBorislav Petkov }; 2456aec1ad7SBorislav Petkov static struct attribute_group pkg_format_attr_group = { 2466aec1ad7SBorislav Petkov .name = "format", 2476aec1ad7SBorislav Petkov .attrs = pkg_format_attrs, 2486aec1ad7SBorislav Petkov }; 2496aec1ad7SBorislav Petkov 2506aec1ad7SBorislav Petkov static cpumask_t cstate_pkg_cpu_mask; 2516aec1ad7SBorislav Petkov 2526aec1ad7SBorislav Petkov static const struct attribute_group *pkg_attr_groups[] = { 2536aec1ad7SBorislav Petkov &pkg_events_attr_group, 2546aec1ad7SBorislav Petkov &pkg_format_attr_group, 2556aec1ad7SBorislav Petkov &cpumask_attr_group, 2566aec1ad7SBorislav Petkov NULL, 2576aec1ad7SBorislav Petkov }; 2586aec1ad7SBorislav Petkov 2596aec1ad7SBorislav Petkov static ssize_t cstate_get_attr_cpumask(struct device *dev, 2606aec1ad7SBorislav Petkov struct device_attribute *attr, 2616aec1ad7SBorislav Petkov char *buf) 2626aec1ad7SBorislav Petkov { 2636aec1ad7SBorislav Petkov struct pmu *pmu = dev_get_drvdata(dev); 2646aec1ad7SBorislav Petkov 2656aec1ad7SBorislav Petkov if (pmu == &cstate_core_pmu) 2666aec1ad7SBorislav Petkov return cpumap_print_to_pagebuf(true, buf, &cstate_core_cpu_mask); 2676aec1ad7SBorislav Petkov else if (pmu == &cstate_pkg_pmu) 2686aec1ad7SBorislav Petkov return cpumap_print_to_pagebuf(true, buf, &cstate_pkg_cpu_mask); 2696aec1ad7SBorislav Petkov else 2706aec1ad7SBorislav Petkov return 0; 2716aec1ad7SBorislav Petkov } 2726aec1ad7SBorislav Petkov 2736aec1ad7SBorislav Petkov static int cstate_pmu_event_init(struct perf_event *event) 2746aec1ad7SBorislav Petkov { 2756aec1ad7SBorislav Petkov u64 cfg = event->attr.config; 27649de0493SThomas Gleixner int cpu; 2776aec1ad7SBorislav Petkov 2786aec1ad7SBorislav Petkov if (event->attr.type != event->pmu->type) 2796aec1ad7SBorislav Petkov return -ENOENT; 2806aec1ad7SBorislav Petkov 2816aec1ad7SBorislav Petkov /* unsupported modes and filters */ 2826aec1ad7SBorislav Petkov if (event->attr.exclude_user || 2836aec1ad7SBorislav Petkov event->attr.exclude_kernel || 2846aec1ad7SBorislav Petkov event->attr.exclude_hv || 2856aec1ad7SBorislav Petkov event->attr.exclude_idle || 2866aec1ad7SBorislav Petkov event->attr.exclude_host || 2876aec1ad7SBorislav Petkov event->attr.exclude_guest || 2886aec1ad7SBorislav Petkov event->attr.sample_period) /* no sampling */ 2896aec1ad7SBorislav Petkov return -EINVAL; 2906aec1ad7SBorislav Petkov 29149de0493SThomas Gleixner if (event->cpu < 0) 29249de0493SThomas Gleixner return -EINVAL; 29349de0493SThomas Gleixner 2946aec1ad7SBorislav Petkov if (event->pmu == &cstate_core_pmu) { 2956aec1ad7SBorislav Petkov if (cfg >= PERF_CSTATE_CORE_EVENT_MAX) 2966aec1ad7SBorislav Petkov return -EINVAL; 2976aec1ad7SBorislav Petkov if (!core_msr[cfg].attr) 2986aec1ad7SBorislav Petkov return -EINVAL; 2996aec1ad7SBorislav Petkov event->hw.event_base = core_msr[cfg].msr; 30049de0493SThomas Gleixner cpu = cpumask_any_and(&cstate_core_cpu_mask, 30149de0493SThomas Gleixner topology_sibling_cpumask(event->cpu)); 3026aec1ad7SBorislav Petkov } else if (event->pmu == &cstate_pkg_pmu) { 3036aec1ad7SBorislav Petkov if (cfg >= PERF_CSTATE_PKG_EVENT_MAX) 3046aec1ad7SBorislav Petkov return -EINVAL; 3056aec1ad7SBorislav Petkov if (!pkg_msr[cfg].attr) 3066aec1ad7SBorislav Petkov return -EINVAL; 3076aec1ad7SBorislav Petkov event->hw.event_base = pkg_msr[cfg].msr; 30849de0493SThomas Gleixner cpu = cpumask_any_and(&cstate_pkg_cpu_mask, 30949de0493SThomas Gleixner topology_core_cpumask(event->cpu)); 31049de0493SThomas Gleixner } else { 3116aec1ad7SBorislav Petkov return -ENOENT; 31249de0493SThomas Gleixner } 3136aec1ad7SBorislav Petkov 31449de0493SThomas Gleixner if (cpu >= nr_cpu_ids) 31549de0493SThomas Gleixner return -ENODEV; 31649de0493SThomas Gleixner 31749de0493SThomas Gleixner event->cpu = cpu; 3186aec1ad7SBorislav Petkov event->hw.config = cfg; 3196aec1ad7SBorislav Petkov event->hw.idx = -1; 32049de0493SThomas Gleixner return 0; 3216aec1ad7SBorislav Petkov } 3226aec1ad7SBorislav Petkov 3236aec1ad7SBorislav Petkov static inline u64 cstate_pmu_read_counter(struct perf_event *event) 3246aec1ad7SBorislav Petkov { 3256aec1ad7SBorislav Petkov u64 val; 3266aec1ad7SBorislav Petkov 3276aec1ad7SBorislav Petkov rdmsrl(event->hw.event_base, val); 3286aec1ad7SBorislav Petkov return val; 3296aec1ad7SBorislav Petkov } 3306aec1ad7SBorislav Petkov 3316aec1ad7SBorislav Petkov static void cstate_pmu_event_update(struct perf_event *event) 3326aec1ad7SBorislav Petkov { 3336aec1ad7SBorislav Petkov struct hw_perf_event *hwc = &event->hw; 3346aec1ad7SBorislav Petkov u64 prev_raw_count, new_raw_count; 3356aec1ad7SBorislav Petkov 3366aec1ad7SBorislav Petkov again: 3376aec1ad7SBorislav Petkov prev_raw_count = local64_read(&hwc->prev_count); 3386aec1ad7SBorislav Petkov new_raw_count = cstate_pmu_read_counter(event); 3396aec1ad7SBorislav Petkov 3406aec1ad7SBorislav Petkov if (local64_cmpxchg(&hwc->prev_count, prev_raw_count, 3416aec1ad7SBorislav Petkov new_raw_count) != prev_raw_count) 3426aec1ad7SBorislav Petkov goto again; 3436aec1ad7SBorislav Petkov 3446aec1ad7SBorislav Petkov local64_add(new_raw_count - prev_raw_count, &event->count); 3456aec1ad7SBorislav Petkov } 3466aec1ad7SBorislav Petkov 3476aec1ad7SBorislav Petkov static void cstate_pmu_event_start(struct perf_event *event, int mode) 3486aec1ad7SBorislav Petkov { 3496aec1ad7SBorislav Petkov local64_set(&event->hw.prev_count, cstate_pmu_read_counter(event)); 3506aec1ad7SBorislav Petkov } 3516aec1ad7SBorislav Petkov 3526aec1ad7SBorislav Petkov static void cstate_pmu_event_stop(struct perf_event *event, int mode) 3536aec1ad7SBorislav Petkov { 3546aec1ad7SBorislav Petkov cstate_pmu_event_update(event); 3556aec1ad7SBorislav Petkov } 3566aec1ad7SBorislav Petkov 3576aec1ad7SBorislav Petkov static void cstate_pmu_event_del(struct perf_event *event, int mode) 3586aec1ad7SBorislav Petkov { 3596aec1ad7SBorislav Petkov cstate_pmu_event_stop(event, PERF_EF_UPDATE); 3606aec1ad7SBorislav Petkov } 3616aec1ad7SBorislav Petkov 3626aec1ad7SBorislav Petkov static int cstate_pmu_event_add(struct perf_event *event, int mode) 3636aec1ad7SBorislav Petkov { 3646aec1ad7SBorislav Petkov if (mode & PERF_EF_START) 3656aec1ad7SBorislav Petkov cstate_pmu_event_start(event, mode); 3666aec1ad7SBorislav Petkov 3676aec1ad7SBorislav Petkov return 0; 3686aec1ad7SBorislav Petkov } 3696aec1ad7SBorislav Petkov 37049de0493SThomas Gleixner /* 37149de0493SThomas Gleixner * Check if exiting cpu is the designated reader. If so migrate the 37249de0493SThomas Gleixner * events when there is a valid target available 37349de0493SThomas Gleixner */ 37477c34ef1SSebastian Andrzej Siewior static int cstate_cpu_exit(unsigned int cpu) 3756aec1ad7SBorislav Petkov { 37649de0493SThomas Gleixner unsigned int target; 3776aec1ad7SBorislav Petkov 37849de0493SThomas Gleixner if (has_cstate_core && 37949de0493SThomas Gleixner cpumask_test_and_clear_cpu(cpu, &cstate_core_cpu_mask)) { 3806aec1ad7SBorislav Petkov 38149de0493SThomas Gleixner target = cpumask_any_but(topology_sibling_cpumask(cpu), cpu); 38249de0493SThomas Gleixner /* Migrate events if there is a valid target */ 38349de0493SThomas Gleixner if (target < nr_cpu_ids) { 3846aec1ad7SBorislav Petkov cpumask_set_cpu(target, &cstate_core_cpu_mask); 3856aec1ad7SBorislav Petkov perf_pmu_migrate_context(&cstate_core_pmu, cpu, target); 3866aec1ad7SBorislav Petkov } 3876aec1ad7SBorislav Petkov } 38849de0493SThomas Gleixner 38949de0493SThomas Gleixner if (has_cstate_pkg && 39049de0493SThomas Gleixner cpumask_test_and_clear_cpu(cpu, &cstate_pkg_cpu_mask)) { 39149de0493SThomas Gleixner 39249de0493SThomas Gleixner target = cpumask_any_but(topology_core_cpumask(cpu), cpu); 39349de0493SThomas Gleixner /* Migrate events if there is a valid target */ 39449de0493SThomas Gleixner if (target < nr_cpu_ids) { 3956aec1ad7SBorislav Petkov cpumask_set_cpu(target, &cstate_pkg_cpu_mask); 3966aec1ad7SBorislav Petkov perf_pmu_migrate_context(&cstate_pkg_pmu, cpu, target); 3976aec1ad7SBorislav Petkov } 3986aec1ad7SBorislav Petkov } 39977c34ef1SSebastian Andrzej Siewior return 0; 40049de0493SThomas Gleixner } 4016aec1ad7SBorislav Petkov 40277c34ef1SSebastian Andrzej Siewior static int cstate_cpu_init(unsigned int cpu) 4036aec1ad7SBorislav Petkov { 40449de0493SThomas Gleixner unsigned int target; 4056aec1ad7SBorislav Petkov 40649de0493SThomas Gleixner /* 40749de0493SThomas Gleixner * If this is the first online thread of that core, set it in 40849de0493SThomas Gleixner * the core cpu mask as the designated reader. 40949de0493SThomas Gleixner */ 41049de0493SThomas Gleixner target = cpumask_any_and(&cstate_core_cpu_mask, 41149de0493SThomas Gleixner topology_sibling_cpumask(cpu)); 41249de0493SThomas Gleixner 41349de0493SThomas Gleixner if (has_cstate_core && target >= nr_cpu_ids) 4146aec1ad7SBorislav Petkov cpumask_set_cpu(cpu, &cstate_core_cpu_mask); 4156aec1ad7SBorislav Petkov 41649de0493SThomas Gleixner /* 41749de0493SThomas Gleixner * If this is the first online thread of that package, set it 41849de0493SThomas Gleixner * in the package cpu mask as the designated reader. 41949de0493SThomas Gleixner */ 42049de0493SThomas Gleixner target = cpumask_any_and(&cstate_pkg_cpu_mask, 42149de0493SThomas Gleixner topology_core_cpumask(cpu)); 42249de0493SThomas Gleixner if (has_cstate_pkg && target >= nr_cpu_ids) 4236aec1ad7SBorislav Petkov cpumask_set_cpu(cpu, &cstate_pkg_cpu_mask); 4246aec1ad7SBorislav Petkov 42577c34ef1SSebastian Andrzej Siewior return 0; 4266aec1ad7SBorislav Petkov } 427c7afba32SThomas Gleixner 428424646eeSThomas Gleixner static struct pmu cstate_core_pmu = { 429424646eeSThomas Gleixner .attr_groups = core_attr_groups, 430424646eeSThomas Gleixner .name = "cstate_core", 431424646eeSThomas Gleixner .task_ctx_nr = perf_invalid_context, 432424646eeSThomas Gleixner .event_init = cstate_pmu_event_init, 433424646eeSThomas Gleixner .add = cstate_pmu_event_add, 434424646eeSThomas Gleixner .del = cstate_pmu_event_del, 435424646eeSThomas Gleixner .start = cstate_pmu_event_start, 436424646eeSThomas Gleixner .stop = cstate_pmu_event_stop, 437424646eeSThomas Gleixner .read = cstate_pmu_event_update, 438424646eeSThomas Gleixner .capabilities = PERF_PMU_CAP_NO_INTERRUPT, 43974545f63SDavid Carrillo-Cisneros .module = THIS_MODULE, 440424646eeSThomas Gleixner }; 441424646eeSThomas Gleixner 442424646eeSThomas Gleixner static struct pmu cstate_pkg_pmu = { 443424646eeSThomas Gleixner .attr_groups = pkg_attr_groups, 444424646eeSThomas Gleixner .name = "cstate_pkg", 445424646eeSThomas Gleixner .task_ctx_nr = perf_invalid_context, 446424646eeSThomas Gleixner .event_init = cstate_pmu_event_init, 447424646eeSThomas Gleixner .add = cstate_pmu_event_add, 448424646eeSThomas Gleixner .del = cstate_pmu_event_del, 449424646eeSThomas Gleixner .start = cstate_pmu_event_start, 450424646eeSThomas Gleixner .stop = cstate_pmu_event_stop, 451424646eeSThomas Gleixner .read = cstate_pmu_event_update, 452424646eeSThomas Gleixner .capabilities = PERF_PMU_CAP_NO_INTERRUPT, 45374545f63SDavid Carrillo-Cisneros .module = THIS_MODULE, 454424646eeSThomas Gleixner }; 455424646eeSThomas Gleixner 456424646eeSThomas Gleixner static const struct cstate_model nhm_cstates __initconst = { 457424646eeSThomas Gleixner .core_events = BIT(PERF_CSTATE_CORE_C3_RES) | 458424646eeSThomas Gleixner BIT(PERF_CSTATE_CORE_C6_RES), 459424646eeSThomas Gleixner 460424646eeSThomas Gleixner .pkg_events = BIT(PERF_CSTATE_PKG_C3_RES) | 461424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C6_RES) | 462424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C7_RES), 463424646eeSThomas Gleixner }; 464424646eeSThomas Gleixner 465424646eeSThomas Gleixner static const struct cstate_model snb_cstates __initconst = { 466424646eeSThomas Gleixner .core_events = BIT(PERF_CSTATE_CORE_C3_RES) | 467424646eeSThomas Gleixner BIT(PERF_CSTATE_CORE_C6_RES) | 468424646eeSThomas Gleixner BIT(PERF_CSTATE_CORE_C7_RES), 469424646eeSThomas Gleixner 470424646eeSThomas Gleixner .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 471424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C3_RES) | 472424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C6_RES) | 473424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C7_RES), 474424646eeSThomas Gleixner }; 475424646eeSThomas Gleixner 476424646eeSThomas Gleixner static const struct cstate_model hswult_cstates __initconst = { 477424646eeSThomas Gleixner .core_events = BIT(PERF_CSTATE_CORE_C3_RES) | 478424646eeSThomas Gleixner BIT(PERF_CSTATE_CORE_C6_RES) | 479424646eeSThomas Gleixner BIT(PERF_CSTATE_CORE_C7_RES), 480424646eeSThomas Gleixner 481424646eeSThomas Gleixner .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 482424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C3_RES) | 483424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C6_RES) | 484424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C7_RES) | 485424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C8_RES) | 486424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C9_RES) | 487424646eeSThomas Gleixner BIT(PERF_CSTATE_PKG_C10_RES), 488424646eeSThomas Gleixner }; 489424646eeSThomas Gleixner 4901159e094SHarry Pan static const struct cstate_model cnl_cstates __initconst = { 4911159e094SHarry Pan .core_events = BIT(PERF_CSTATE_CORE_C1_RES) | 4921159e094SHarry Pan BIT(PERF_CSTATE_CORE_C3_RES) | 4931159e094SHarry Pan BIT(PERF_CSTATE_CORE_C6_RES) | 4941159e094SHarry Pan BIT(PERF_CSTATE_CORE_C7_RES), 4951159e094SHarry Pan 4961159e094SHarry Pan .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 4971159e094SHarry Pan BIT(PERF_CSTATE_PKG_C3_RES) | 4981159e094SHarry Pan BIT(PERF_CSTATE_PKG_C6_RES) | 4991159e094SHarry Pan BIT(PERF_CSTATE_PKG_C7_RES) | 5001159e094SHarry Pan BIT(PERF_CSTATE_PKG_C8_RES) | 5011159e094SHarry Pan BIT(PERF_CSTATE_PKG_C9_RES) | 5021159e094SHarry Pan BIT(PERF_CSTATE_PKG_C10_RES), 5031159e094SHarry Pan }; 5041159e094SHarry Pan 505424646eeSThomas Gleixner static const struct cstate_model slm_cstates __initconst = { 506424646eeSThomas Gleixner .core_events = BIT(PERF_CSTATE_CORE_C1_RES) | 507424646eeSThomas Gleixner BIT(PERF_CSTATE_CORE_C6_RES), 508424646eeSThomas Gleixner 509424646eeSThomas Gleixner .pkg_events = BIT(PERF_CSTATE_PKG_C6_RES), 510424646eeSThomas Gleixner .quirks = SLM_PKG_C6_USE_C7_MSR, 511424646eeSThomas Gleixner }; 512424646eeSThomas Gleixner 513889882bcSLukasz Odzioba 514889882bcSLukasz Odzioba static const struct cstate_model knl_cstates __initconst = { 515889882bcSLukasz Odzioba .core_events = BIT(PERF_CSTATE_CORE_C6_RES), 516889882bcSLukasz Odzioba 517889882bcSLukasz Odzioba .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 518889882bcSLukasz Odzioba BIT(PERF_CSTATE_PKG_C3_RES) | 519889882bcSLukasz Odzioba BIT(PERF_CSTATE_PKG_C6_RES), 520889882bcSLukasz Odzioba .quirks = KNL_CORE_C6_MSR, 521889882bcSLukasz Odzioba }; 522889882bcSLukasz Odzioba 523889882bcSLukasz Odzioba 5245c10b048SHarry Pan static const struct cstate_model glm_cstates __initconst = { 5255c10b048SHarry Pan .core_events = BIT(PERF_CSTATE_CORE_C1_RES) | 5265c10b048SHarry Pan BIT(PERF_CSTATE_CORE_C3_RES) | 5275c10b048SHarry Pan BIT(PERF_CSTATE_CORE_C6_RES), 5285c10b048SHarry Pan 5295c10b048SHarry Pan .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 5305c10b048SHarry Pan BIT(PERF_CSTATE_PKG_C3_RES) | 5315c10b048SHarry Pan BIT(PERF_CSTATE_PKG_C6_RES) | 5325c10b048SHarry Pan BIT(PERF_CSTATE_PKG_C10_RES), 5335c10b048SHarry Pan }; 5345c10b048SHarry Pan 535889882bcSLukasz Odzioba 536424646eeSThomas Gleixner #define X86_CSTATES_MODEL(model, states) \ 537424646eeSThomas Gleixner { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long) &(states) } 538424646eeSThomas Gleixner 539424646eeSThomas Gleixner static const struct x86_cpu_id intel_cstates_match[] __initconst = { 540bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_NEHALEM, nhm_cstates), 541bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_NEHALEM_EP, nhm_cstates), 542bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_NEHALEM_EX, nhm_cstates), 543424646eeSThomas Gleixner 544bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_WESTMERE, nhm_cstates), 545bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_WESTMERE_EP, nhm_cstates), 546bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_WESTMERE_EX, nhm_cstates), 547424646eeSThomas Gleixner 548bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_SANDYBRIDGE, snb_cstates), 549bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_SANDYBRIDGE_X, snb_cstates), 550424646eeSThomas Gleixner 551bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_IVYBRIDGE, snb_cstates), 552bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_IVYBRIDGE_X, snb_cstates), 553424646eeSThomas Gleixner 554bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_HASWELL_CORE, snb_cstates), 555bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_HASWELL_X, snb_cstates), 556bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_HASWELL_GT3E, snb_cstates), 557424646eeSThomas Gleixner 558bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_HASWELL_ULT, hswult_cstates), 559424646eeSThomas Gleixner 560bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_ATOM_SILVERMONT1, slm_cstates), 561bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_ATOM_SILVERMONT2, slm_cstates), 562bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_ATOM_AIRMONT, slm_cstates), 563424646eeSThomas Gleixner 564bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_BROADWELL_CORE, snb_cstates), 565bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_BROADWELL_XEON_D, snb_cstates), 566bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_BROADWELL_GT3E, snb_cstates), 567bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_BROADWELL_X, snb_cstates), 568424646eeSThomas Gleixner 569bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_SKYLAKE_MOBILE, snb_cstates), 570bf4ad541SDave Hansen X86_CSTATES_MODEL(INTEL_FAM6_SKYLAKE_DESKTOP, snb_cstates), 571b09c146fSKan Liang X86_CSTATES_MODEL(INTEL_FAM6_SKYLAKE_X, snb_cstates), 572889882bcSLukasz Odzioba 573f2029b1eSSrinivas Pandruvada X86_CSTATES_MODEL(INTEL_FAM6_KABYLAKE_MOBILE, snb_cstates), 574f2029b1eSSrinivas Pandruvada X86_CSTATES_MODEL(INTEL_FAM6_KABYLAKE_DESKTOP, snb_cstates), 575f2029b1eSSrinivas Pandruvada 5761159e094SHarry Pan X86_CSTATES_MODEL(INTEL_FAM6_CANNONLAKE_MOBILE, cnl_cstates), 5771159e094SHarry Pan 578889882bcSLukasz Odzioba X86_CSTATES_MODEL(INTEL_FAM6_XEON_PHI_KNL, knl_cstates), 5791dba23b1SPiotr Luc X86_CSTATES_MODEL(INTEL_FAM6_XEON_PHI_KNM, knl_cstates), 5805c10b048SHarry Pan 5815c10b048SHarry Pan X86_CSTATES_MODEL(INTEL_FAM6_ATOM_GOLDMONT, glm_cstates), 582b09c146fSKan Liang X86_CSTATES_MODEL(INTEL_FAM6_ATOM_DENVERTON, glm_cstates), 583b09c146fSKan Liang 584b09c146fSKan Liang X86_CSTATES_MODEL(INTEL_FAM6_ATOM_GEMINI_LAKE, glm_cstates), 585424646eeSThomas Gleixner { }, 586424646eeSThomas Gleixner }; 587424646eeSThomas Gleixner MODULE_DEVICE_TABLE(x86cpu, intel_cstates_match); 588424646eeSThomas Gleixner 5896aec1ad7SBorislav Petkov /* 5906aec1ad7SBorislav Petkov * Probe the cstate events and insert the available one into sysfs attrs 591424646eeSThomas Gleixner * Return false if there are no available events. 5926aec1ad7SBorislav Petkov */ 593424646eeSThomas Gleixner static bool __init cstate_probe_msr(const unsigned long evmsk, int max, 594424646eeSThomas Gleixner struct perf_cstate_msr *msr, 595424646eeSThomas Gleixner struct attribute **attrs) 5966aec1ad7SBorislav Petkov { 597424646eeSThomas Gleixner bool found = false; 598424646eeSThomas Gleixner unsigned int bit; 5996aec1ad7SBorislav Petkov u64 val; 6006aec1ad7SBorislav Petkov 601424646eeSThomas Gleixner for (bit = 0; bit < max; bit++) { 602424646eeSThomas Gleixner if (test_bit(bit, &evmsk) && !rdmsrl_safe(msr[bit].msr, &val)) { 603424646eeSThomas Gleixner *attrs++ = &msr[bit].attr->attr.attr; 604424646eeSThomas Gleixner found = true; 605424646eeSThomas Gleixner } else { 606424646eeSThomas Gleixner msr[bit].attr = NULL; 607424646eeSThomas Gleixner } 608424646eeSThomas Gleixner } 609424646eeSThomas Gleixner *attrs = NULL; 610424646eeSThomas Gleixner 611424646eeSThomas Gleixner return found; 6126aec1ad7SBorislav Petkov } 6136aec1ad7SBorislav Petkov 614424646eeSThomas Gleixner static int __init cstate_probe(const struct cstate_model *cm) 6156aec1ad7SBorislav Petkov { 6166aec1ad7SBorislav Petkov /* SLM has different MSR for PKG C6 */ 617424646eeSThomas Gleixner if (cm->quirks & SLM_PKG_C6_USE_C7_MSR) 6186aec1ad7SBorislav Petkov pkg_msr[PERF_CSTATE_PKG_C6_RES].msr = MSR_PKG_C7_RESIDENCY; 6196aec1ad7SBorislav Petkov 620889882bcSLukasz Odzioba /* KNL has different MSR for CORE C6 */ 621889882bcSLukasz Odzioba if (cm->quirks & KNL_CORE_C6_MSR) 622889882bcSLukasz Odzioba pkg_msr[PERF_CSTATE_CORE_C6_RES].msr = MSR_KNL_CORE_C6_RESIDENCY; 623889882bcSLukasz Odzioba 624889882bcSLukasz Odzioba 625424646eeSThomas Gleixner has_cstate_core = cstate_probe_msr(cm->core_events, 626424646eeSThomas Gleixner PERF_CSTATE_CORE_EVENT_MAX, 627424646eeSThomas Gleixner core_msr, core_events_attrs); 6286aec1ad7SBorislav Petkov 629424646eeSThomas Gleixner has_cstate_pkg = cstate_probe_msr(cm->pkg_events, 630424646eeSThomas Gleixner PERF_CSTATE_PKG_EVENT_MAX, 631424646eeSThomas Gleixner pkg_msr, pkg_events_attrs); 6326aec1ad7SBorislav Petkov 6336aec1ad7SBorislav Petkov return (has_cstate_core || has_cstate_pkg) ? 0 : -ENODEV; 6346aec1ad7SBorislav Petkov } 6356aec1ad7SBorislav Petkov 636c7afba32SThomas Gleixner static inline void cstate_cleanup(void) 6376aec1ad7SBorislav Petkov { 638834fcd29SThomas Gleixner cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_ONLINE); 639834fcd29SThomas Gleixner cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_STARTING); 640834fcd29SThomas Gleixner 641d29859e7SThomas Gleixner if (has_cstate_core) 642d29859e7SThomas Gleixner perf_pmu_unregister(&cstate_core_pmu); 643d29859e7SThomas Gleixner 644d29859e7SThomas Gleixner if (has_cstate_pkg) 645d29859e7SThomas Gleixner perf_pmu_unregister(&cstate_pkg_pmu); 646d29859e7SThomas Gleixner } 647d29859e7SThomas Gleixner 648d29859e7SThomas Gleixner static int __init cstate_init(void) 649d29859e7SThomas Gleixner { 65077c34ef1SSebastian Andrzej Siewior int err; 6516aec1ad7SBorislav Petkov 65277c34ef1SSebastian Andrzej Siewior cpuhp_setup_state(CPUHP_AP_PERF_X86_CSTATE_STARTING, 653834fcd29SThomas Gleixner "perf/x86/cstate:starting", cstate_cpu_init, NULL); 65477c34ef1SSebastian Andrzej Siewior cpuhp_setup_state(CPUHP_AP_PERF_X86_CSTATE_ONLINE, 655834fcd29SThomas Gleixner "perf/x86/cstate:online", NULL, cstate_cpu_exit); 6566aec1ad7SBorislav Petkov 6576aec1ad7SBorislav Petkov if (has_cstate_core) { 6586aec1ad7SBorislav Petkov err = perf_pmu_register(&cstate_core_pmu, cstate_core_pmu.name, -1); 659d29859e7SThomas Gleixner if (err) { 660d29859e7SThomas Gleixner has_cstate_core = false; 661d29859e7SThomas Gleixner pr_info("Failed to register cstate core pmu\n"); 662834fcd29SThomas Gleixner cstate_cleanup(); 66377c34ef1SSebastian Andrzej Siewior return err; 664d29859e7SThomas Gleixner } 6656aec1ad7SBorislav Petkov } 6666aec1ad7SBorislav Petkov 6676aec1ad7SBorislav Petkov if (has_cstate_pkg) { 6686aec1ad7SBorislav Petkov err = perf_pmu_register(&cstate_pkg_pmu, cstate_pkg_pmu.name, -1); 669d29859e7SThomas Gleixner if (err) { 670d29859e7SThomas Gleixner has_cstate_pkg = false; 671d29859e7SThomas Gleixner pr_info("Failed to register cstate pkg pmu\n"); 672d29859e7SThomas Gleixner cstate_cleanup(); 67377c34ef1SSebastian Andrzej Siewior return err; 6746aec1ad7SBorislav Petkov } 6756aec1ad7SBorislav Petkov } 676834fcd29SThomas Gleixner return 0; 677d29859e7SThomas Gleixner } 6786aec1ad7SBorislav Petkov 6796aec1ad7SBorislav Petkov static int __init cstate_pmu_init(void) 6806aec1ad7SBorislav Petkov { 681424646eeSThomas Gleixner const struct x86_cpu_id *id; 6826aec1ad7SBorislav Petkov int err; 6836aec1ad7SBorislav Petkov 684424646eeSThomas Gleixner if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) 6856aec1ad7SBorislav Petkov return -ENODEV; 6866aec1ad7SBorislav Petkov 687424646eeSThomas Gleixner id = x86_match_cpu(intel_cstates_match); 688424646eeSThomas Gleixner if (!id) 689424646eeSThomas Gleixner return -ENODEV; 690424646eeSThomas Gleixner 691424646eeSThomas Gleixner err = cstate_probe((const struct cstate_model *) id->driver_data); 6926aec1ad7SBorislav Petkov if (err) 6936aec1ad7SBorislav Petkov return err; 6946aec1ad7SBorislav Petkov 695d29859e7SThomas Gleixner return cstate_init(); 6966aec1ad7SBorislav Petkov } 697c7afba32SThomas Gleixner module_init(cstate_pmu_init); 698c7afba32SThomas Gleixner 699c7afba32SThomas Gleixner static void __exit cstate_pmu_exit(void) 700c7afba32SThomas Gleixner { 701c7afba32SThomas Gleixner cstate_cleanup(); 702c7afba32SThomas Gleixner } 703c7afba32SThomas Gleixner module_exit(cstate_pmu_exit); 704