From 4b6e2571bf00019e016255ad62b56feb9f498db7 Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Sat, 19 Mar 2016 00:20:50 -0700 Subject: [PATCH] x86/perf/intel/rapl: Make the Intel RAPL PMU driver modular By default, the RAPL driver will be built into the kernel. If it is configured as a module, the supported CPU model can be auto loaded. Also clean up the code of rapl_pmu_init(). Based-on-a-patch-by: Thomas Gleixner Signed-off-by: Kan Liang Signed-off-by: Thomas Gleixner Reviewed-by: Thomas Gleixner Cc: Alexander Shishkin Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Vince Weaver Link: http://lkml.kernel.org/r/1458372050-2420-2-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar --- arch/x86/Kconfig.perf | 8 +++ arch/x86/events/intel/Makefile | 3 +- arch/x86/events/intel/rapl.c | 121 ++++++++++++++++++++++----------- 3 files changed, 92 insertions(+), 40 deletions(-) diff --git a/arch/x86/Kconfig.perf b/arch/x86/Kconfig.perf index 90b7f5878c96..b239ad5d0a4e 100644 --- a/arch/x86/Kconfig.perf +++ b/arch/x86/Kconfig.perf @@ -8,4 +8,12 @@ config PERF_EVENTS_INTEL_UNCORE Include support for Intel uncore performance events. These are available on NehalemEX and more modern processors. +config PERF_EVENTS_INTEL_RAPL + tristate "Intel rapl performance events" + depends on PERF_EVENTS && CPU_SUP_INTEL && PCI + default y + ---help--- + Include support for Intel rapl performance events for power + monitoring on modern processors. + endmenu diff --git a/arch/x86/events/intel/Makefile b/arch/x86/events/intel/Makefile index a6c744871a73..27adbbab9910 100644 --- a/arch/x86/events/intel/Makefile +++ b/arch/x86/events/intel/Makefile @@ -1,6 +1,7 @@ obj-$(CONFIG_CPU_SUP_INTEL) += core.o bts.o cqm.o obj-$(CONFIG_CPU_SUP_INTEL) += cstate.o ds.o knc.o obj-$(CONFIG_CPU_SUP_INTEL) += lbr.o p4.o p6.o pt.o -obj-$(CONFIG_CPU_SUP_INTEL) += rapl.o +obj-$(CONFIG_PERF_EVENTS_INTEL_RAPL) += intel-rapl.o +intel-rapl-objs := rapl.o obj-$(CONFIG_PERF_EVENTS_INTEL_UNCORE) += intel-uncore.o intel-uncore-objs := uncore.o uncore_nhmex.o uncore_snb.o uncore_snbep.o diff --git a/arch/x86/events/intel/rapl.c b/arch/x86/events/intel/rapl.c index 70c93f9b03ac..e657de1923c2 100644 --- a/arch/x86/events/intel/rapl.c +++ b/arch/x86/events/intel/rapl.c @@ -53,6 +53,8 @@ #include #include "../perf_event.h" +MODULE_LICENSE("GPL"); + /* * RAPL energy status counters */ @@ -592,6 +594,11 @@ static int rapl_cpu_notifier(struct notifier_block *self, return NOTIFY_OK; } +static struct notifier_block rapl_cpu_nb = { + .notifier_call = rapl_cpu_notifier, + .priority = CPU_PRI_PERF + 1, +}; + static int rapl_check_hw_unit(bool apply_quirk) { u64 msr_rapl_power_unit_bits; @@ -660,7 +667,7 @@ static int __init rapl_prepare_cpus(void) return 0; } -static void __init cleanup_rapl_pmus(void) +static void cleanup_rapl_pmus(void) { int i; @@ -691,51 +698,77 @@ static int __init init_rapl_pmus(void) return 0; } +#define X86_RAPL_MODEL_MATCH(model, init) \ + { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&init } + +struct intel_rapl_init_fun { + bool apply_quirk; + int cntr_mask; + struct attribute **attrs; +}; + +static const struct intel_rapl_init_fun snb_rapl_init __initconst = { + .apply_quirk = false, + .cntr_mask = RAPL_IDX_CLN, + .attrs = rapl_events_cln_attr, +}; + +static const struct intel_rapl_init_fun hsx_rapl_init __initconst = { + .apply_quirk = true, + .cntr_mask = RAPL_IDX_SRV, + .attrs = rapl_events_srv_attr, +}; + +static const struct intel_rapl_init_fun hsw_rapl_init __initconst = { + .apply_quirk = false, + .cntr_mask = RAPL_IDX_HSW, + .attrs = rapl_events_hsw_attr, +}; + +static const struct intel_rapl_init_fun snbep_rapl_init __initconst = { + .apply_quirk = false, + .cntr_mask = RAPL_IDX_SRV, + .attrs = rapl_events_srv_attr, +}; + +static const struct intel_rapl_init_fun knl_rapl_init __initconst = { + .apply_quirk = true, + .cntr_mask = RAPL_IDX_KNL, + .attrs = rapl_events_knl_attr, +}; + static const struct x86_cpu_id rapl_cpu_match[] __initconst = { - [0] = { .vendor = X86_VENDOR_INTEL, .family = 6 }, - [1] = {}, + X86_RAPL_MODEL_MATCH(42, snb_rapl_init), /* Sandy Bridge */ + X86_RAPL_MODEL_MATCH(58, snb_rapl_init), /* Ivy Bridge */ + X86_RAPL_MODEL_MATCH(63, hsx_rapl_init), /* Haswell-Server */ + X86_RAPL_MODEL_MATCH(79, hsx_rapl_init), /* Broadwell-Server */ + X86_RAPL_MODEL_MATCH(60, hsw_rapl_init), /* Haswell */ + X86_RAPL_MODEL_MATCH(69, hsw_rapl_init), /* Haswell-Celeron */ + X86_RAPL_MODEL_MATCH(61, hsw_rapl_init), /* Broadwell */ + X86_RAPL_MODEL_MATCH(71, hsw_rapl_init), /* Broadwell-H */ + X86_RAPL_MODEL_MATCH(45, snbep_rapl_init), /* Sandy Bridge-EP */ + X86_RAPL_MODEL_MATCH(62, snbep_rapl_init), /* IvyTown */ + X86_RAPL_MODEL_MATCH(87, knl_rapl_init), /* Knights Landing */ + {}, }; +MODULE_DEVICE_TABLE(x86cpu, rapl_cpu_match); + static int __init rapl_pmu_init(void) { - bool apply_quirk = false; + const struct x86_cpu_id *id; + struct intel_rapl_init_fun *rapl_init; + bool apply_quirk; int ret; - if (!x86_match_cpu(rapl_cpu_match)) + id = x86_match_cpu(rapl_cpu_match); + if (!id) return -ENODEV; - switch (boot_cpu_data.x86_model) { - case 42: /* Sandy Bridge */ - case 58: /* Ivy Bridge */ - rapl_cntr_mask = RAPL_IDX_CLN; - rapl_pmu_events_group.attrs = rapl_events_cln_attr; - break; - case 63: /* Haswell-Server */ - case 79: /* Broadwell-Server */ - apply_quirk = true; - rapl_cntr_mask = RAPL_IDX_SRV; - rapl_pmu_events_group.attrs = rapl_events_srv_attr; - break; - case 60: /* Haswell */ - case 69: /* Haswell-Celeron */ - case 61: /* Broadwell */ - case 71: /* Broadwell-H */ - rapl_cntr_mask = RAPL_IDX_HSW; - rapl_pmu_events_group.attrs = rapl_events_hsw_attr; - break; - case 45: /* Sandy Bridge-EP */ - case 62: /* IvyTown */ - rapl_cntr_mask = RAPL_IDX_SRV; - rapl_pmu_events_group.attrs = rapl_events_srv_attr; - break; - case 87: /* Knights Landing */ - apply_quirk = true; - rapl_cntr_mask = RAPL_IDX_KNL; - rapl_pmu_events_group.attrs = rapl_events_knl_attr; - break; - default: - return -ENODEV; - } + rapl_init = (struct intel_rapl_init_fun *)id->driver_data; + apply_quirk = rapl_init->apply_quirk; + rapl_cntr_mask = rapl_init->cntr_mask; + rapl_pmu_events_group.attrs = rapl_init->attrs; ret = rapl_check_hw_unit(apply_quirk); if (ret) @@ -755,7 +788,7 @@ static int __init rapl_pmu_init(void) if (ret) goto out; - __perf_cpu_notifier(rapl_cpu_notifier); + __register_cpu_notifier(&rapl_cpu_nb); cpu_notifier_register_done(); rapl_advertise(); return 0; @@ -766,4 +799,14 @@ out: cpu_notifier_register_done(); return ret; } -device_initcall(rapl_pmu_init); +module_init(rapl_pmu_init); + +static void __exit intel_rapl_exit(void) +{ + cpu_notifier_register_begin(); + __unregister_cpu_notifier(&rapl_cpu_nb); + perf_pmu_unregister(&rapl_pmus->pmu); + cleanup_rapl_pmus(); + cpu_notifier_register_done(); +} +module_exit(intel_rapl_exit); -- 2.20.1