aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/arch/x86/events/rapl.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/events/rapl.c')
-rw-r--r--arch/x86/events/rapl.c851
1 files changed, 851 insertions, 0 deletions
diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
new file mode 100644
index 000000000000..0f2bf59f4354
--- /dev/null
+++ b/arch/x86/events/rapl.c
@@ -0,0 +1,851 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Support Intel/AMD RAPL energy consumption counters
+ * Copyright (C) 2013 Google, Inc., Stephane Eranian
+ *
+ * Intel RAPL interface is specified in the IA-32 Manual Vol3b
+ * section 14.7.1 (September 2013)
+ *
+ * AMD RAPL interface for Fam17h is described in the public PPR:
+ * https://bugzilla.kernel.org/show_bug.cgi?id=206537
+ *
+ * RAPL provides more controls than just reporting energy consumption
+ * however here we only expose the 3 energy consumption free running
+ * counters (pp0, pkg, dram).
+ *
+ * Each of those counters increments in a power unit defined by the
+ * RAPL_POWER_UNIT MSR. On SandyBridge, this unit is 1/(2^16) Joules
+ * but it can vary.
+ *
+ * Counter to rapl events mappings:
+ *
+ * pp0 counter: consumption of all physical cores (power plane 0)
+ * event: rapl_energy_cores
+ * perf code: 0x1
+ *
+ * pkg counter: consumption of the whole processor package
+ * event: rapl_energy_pkg
+ * perf code: 0x2
+ *
+ * dram counter: consumption of the dram domain (servers only)
+ * event: rapl_energy_dram
+ * perf code: 0x3
+ *
+ * gpu counter: consumption of the builtin-gpu domain (client only)
+ * event: rapl_energy_gpu
+ * perf code: 0x4
+ *
+ * psys counter: consumption of the builtin-psys domain (client only)
+ * event: rapl_energy_psys
+ * perf code: 0x5
+ *
+ * We manage those counters as free running (read-only). They may be
+ * use simultaneously by other tools, such as turbostat.
+ *
+ * The events only support system-wide mode counting. There is no
+ * sampling support because it does not make sense and is not
+ * supported by the RAPL hardware.
+ *
+ * Because we want to avoid floating-point operations in the kernel,
+ * the events are all reported in fixed point arithmetic (32.32).
+ * Tools must adjust the counts to convert them to Watts using
+ * the duration of the measurement. Tools may use a function such as
+ * ldexp(raw_count, -32);
+ */
+
+#define pr_fmt(fmt) "RAPL PMU: " fmt
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/perf_event.h>
+#include <linux/nospec.h>
+#include <asm/cpu_device_id.h>
+#include <asm/intel-family.h>
+#include "perf_event.h"
+#include "probe.h"
+
+MODULE_LICENSE("GPL");
+
+/*
+ * RAPL energy status counters
+ */
+enum perf_rapl_events {
+ PERF_RAPL_PP0 = 0, /* all cores */
+ PERF_RAPL_PKG, /* entire package */
+ PERF_RAPL_RAM, /* DRAM */
+ PERF_RAPL_PP1, /* gpu */
+ PERF_RAPL_PSYS, /* psys */
+
+ PERF_RAPL_MAX,
+ NR_RAPL_DOMAINS = PERF_RAPL_MAX,
+};
+
+static const char *const rapl_domain_names[NR_RAPL_DOMAINS] __initconst = {
+ "pp0-core",
+ "package",
+ "dram",
+ "pp1-gpu",
+ "psys",
+};
+
+/*
+ * event code: LSB 8 bits, passed in attr->config
+ * any other bit is reserved
+ */
+#define RAPL_EVENT_MASK 0xFFULL
+
+#define DEFINE_RAPL_FORMAT_ATTR(_var, _name, _format) \
+static ssize_t __rapl_##_var##_show(struct kobject *kobj, \
+ struct kobj_attribute *attr, \
+ char *page) \
+{ \
+ BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
+ return sprintf(page, _format "\n"); \
+} \
+static struct kobj_attribute format_attr_##_var = \
+ __ATTR(_name, 0444, __rapl_##_var##_show, NULL)
+
+#define RAPL_CNTR_WIDTH 32
+
+#define RAPL_EVENT_ATTR_STR(_name, v, str) \
+static struct perf_pmu_events_attr event_attr_##v = { \
+ .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \
+ .id = 0, \
+ .event_str = str, \
+};
+
+struct rapl_pmu {
+ raw_spinlock_t lock;
+ int n_active;
+ int cpu;
+ struct list_head active_list;
+ struct pmu *pmu;
+ ktime_t timer_interval;
+ struct hrtimer hrtimer;
+};
+
+struct rapl_pmus {
+ struct pmu pmu;
+ unsigned int maxdie;
+ struct rapl_pmu *pmus[];
+};
+
+struct rapl_model {
+ struct perf_msr *rapl_msrs;
+ unsigned long events;
+ unsigned int msr_power_unit;
+ bool apply_quirk;
+};
+
+ /* 1/2^hw_unit Joule */
+static int rapl_hw_unit[NR_RAPL_DOMAINS] __read_mostly;
+static struct rapl_pmus *rapl_pmus;
+static cpumask_t rapl_cpu_mask;
+static unsigned int rapl_cntr_mask;
+static u64 rapl_timer_ms;
+static struct perf_msr *rapl_msrs;
+
+static inline struct rapl_pmu *cpu_to_rapl_pmu(unsigned int cpu)
+{
+ unsigned int dieid = topology_logical_die_id(cpu);
+
+ /*
+ * The unsigned check also catches the '-1' return value for non
+ * existent mappings in the topology map.
+ */
+ return dieid < rapl_pmus->maxdie ? rapl_pmus->pmus[dieid] : NULL;
+}
+
+static inline u64 rapl_read_counter(struct perf_event *event)
+{
+ u64 raw;
+ rdmsrl(event->hw.event_base, raw);
+ return raw;
+}
+
+static inline u64 rapl_scale(u64 v, int cfg)
+{
+ if (cfg > NR_RAPL_DOMAINS) {
+ pr_warn("Invalid domain %d, failed to scale data\n", cfg);
+ return v;
+ }
+ /*
+ * scale delta to smallest unit (1/2^32)
+ * users must then scale back: count * 1/(1e9*2^32) to get Joules
+ * or use ldexp(count, -32).
+ * Watts = Joules/Time delta
+ */
+ return v << (32 - rapl_hw_unit[cfg - 1]);
+}
+
+static u64 rapl_event_update(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ u64 prev_raw_count, new_raw_count;
+ s64 delta, sdelta;
+ int shift = RAPL_CNTR_WIDTH;
+
+again:
+ prev_raw_count = local64_read(&hwc->prev_count);
+ rdmsrl(event->hw.event_base, new_raw_count);
+
+ if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
+ new_raw_count) != prev_raw_count) {
+ cpu_relax();
+ goto again;
+ }
+
+ /*
+ * Now we have the new raw value and have updated the prev
+ * timestamp already. We can now calculate the elapsed delta
+ * (event-)time and add that to the generic event.
+ *
+ * Careful, not all hw sign-extends above the physical width
+ * of the count.
+ */
+ delta = (new_raw_count << shift) - (prev_raw_count << shift);
+ delta >>= shift;
+
+ sdelta = rapl_scale(delta, event->hw.config);
+
+ local64_add(sdelta, &event->count);
+
+ return new_raw_count;
+}
+
+static void rapl_start_hrtimer(struct rapl_pmu *pmu)
+{
+ hrtimer_start(&pmu->hrtimer, pmu->timer_interval,
+ HRTIMER_MODE_REL_PINNED);
+}
+
+static enum hrtimer_restart rapl_hrtimer_handle(struct hrtimer *hrtimer)
+{
+ struct rapl_pmu *pmu = container_of(hrtimer, struct rapl_pmu, hrtimer);
+ struct perf_event *event;
+ unsigned long flags;
+
+ if (!pmu->n_active)
+ return HRTIMER_NORESTART;
+
+ raw_spin_lock_irqsave(&pmu->lock, flags);
+
+ list_for_each_entry(event, &pmu->active_list, active_entry)
+ rapl_event_update(event);
+
+ raw_spin_unlock_irqrestore(&pmu->lock, flags);
+
+ hrtimer_forward_now(hrtimer, pmu->timer_interval);
+
+ return HRTIMER_RESTART;
+}
+
+static void rapl_hrtimer_init(struct rapl_pmu *pmu)
+{
+ struct hrtimer *hr = &pmu->hrtimer;
+
+ hrtimer_init(hr, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ hr->function = rapl_hrtimer_handle;
+}
+
+static void __rapl_pmu_event_start(struct rapl_pmu *pmu,
+ struct perf_event *event)
+{
+ if (WARN_ON_ONCE(!(event->hw.state & PERF_HES_STOPPED)))
+ return;
+
+ event->hw.state = 0;
+
+ list_add_tail(&event->active_entry, &pmu->active_list);
+
+ local64_set(&event->hw.prev_count, rapl_read_counter(event));
+
+ pmu->n_active++;
+ if (pmu->n_active == 1)
+ rapl_start_hrtimer(pmu);
+}
+
+static void rapl_pmu_event_start(struct perf_event *event, int mode)
+{
+ struct rapl_pmu *pmu = event->pmu_private;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&pmu->lock, flags);
+ __rapl_pmu_event_start(pmu, event);
+ raw_spin_unlock_irqrestore(&pmu->lock, flags);
+}
+
+static void rapl_pmu_event_stop(struct perf_event *event, int mode)
+{
+ struct rapl_pmu *pmu = event->pmu_private;
+ struct hw_perf_event *hwc = &event->hw;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&pmu->lock, flags);
+
+ /* mark event as deactivated and stopped */
+ if (!(hwc->state & PERF_HES_STOPPED)) {
+ WARN_ON_ONCE(pmu->n_active <= 0);
+ pmu->n_active--;
+ if (pmu->n_active == 0)
+ hrtimer_cancel(&pmu->hrtimer);
+
+ list_del(&event->active_entry);
+
+ WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
+ hwc->state |= PERF_HES_STOPPED;
+ }
+
+ /* check if update of sw counter is necessary */
+ if ((mode & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) {
+ /*
+ * Drain the remaining delta count out of a event
+ * that we are disabling:
+ */
+ rapl_event_update(event);
+ hwc->state |= PERF_HES_UPTODATE;
+ }
+
+ raw_spin_unlock_irqrestore(&pmu->lock, flags);
+}
+
+static int rapl_pmu_event_add(struct perf_event *event, int mode)
+{
+ struct rapl_pmu *pmu = event->pmu_private;
+ struct hw_perf_event *hwc = &event->hw;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&pmu->lock, flags);
+
+ hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
+
+ if (mode & PERF_EF_START)
+ __rapl_pmu_event_start(pmu, event);
+
+ raw_spin_unlock_irqrestore(&pmu->lock, flags);
+
+ return 0;
+}
+
+static void rapl_pmu_event_del(struct perf_event *event, int flags)
+{
+ rapl_pmu_event_stop(event, PERF_EF_UPDATE);
+}
+
+static int rapl_pmu_event_init(struct perf_event *event)
+{
+ u64 cfg = event->attr.config & RAPL_EVENT_MASK;
+ int bit, ret = 0;
+ struct rapl_pmu *pmu;
+
+ /* only look at RAPL events */
+ if (event->attr.type != rapl_pmus->pmu.type)
+ return -ENOENT;
+
+ /* check only supported bits are set */
+ if (event->attr.config & ~RAPL_EVENT_MASK)
+ return -EINVAL;
+
+ if (event->cpu < 0)
+ return -EINVAL;
+
+ event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG;
+
+ if (!cfg || cfg >= NR_RAPL_DOMAINS + 1)
+ return -EINVAL;
+
+ cfg = array_index_nospec((long)cfg, NR_RAPL_DOMAINS + 1);
+ bit = cfg - 1;
+
+ /* check event supported */
+ if (!(rapl_cntr_mask & (1 << bit)))
+ return -EINVAL;
+
+ /* unsupported modes and filters */
+ if (event->attr.sample_period) /* no sampling */
+ return -EINVAL;
+
+ /* must be done before validate_group */
+ pmu = cpu_to_rapl_pmu(event->cpu);
+ if (!pmu)
+ return -EINVAL;
+ event->cpu = pmu->cpu;
+ event->pmu_private = pmu;
+ event->hw.event_base = rapl_msrs[bit].msr;
+ event->hw.config = cfg;
+ event->hw.idx = bit;
+
+ return ret;
+}
+
+static void rapl_pmu_event_read(struct perf_event *event)
+{
+ rapl_event_update(event);
+}
+
+static ssize_t rapl_get_attr_cpumask(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return cpumap_print_to_pagebuf(true, buf, &rapl_cpu_mask);
+}
+
+static DEVICE_ATTR(cpumask, S_IRUGO, rapl_get_attr_cpumask, NULL);
+
+static struct attribute *rapl_pmu_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static struct attribute_group rapl_pmu_attr_group = {
+ .attrs = rapl_pmu_attrs,
+};
+
+RAPL_EVENT_ATTR_STR(energy-cores, rapl_cores, "event=0x01");
+RAPL_EVENT_ATTR_STR(energy-pkg , rapl_pkg, "event=0x02");
+RAPL_EVENT_ATTR_STR(energy-ram , rapl_ram, "event=0x03");
+RAPL_EVENT_ATTR_STR(energy-gpu , rapl_gpu, "event=0x04");
+RAPL_EVENT_ATTR_STR(energy-psys, rapl_psys, "event=0x05");
+
+RAPL_EVENT_ATTR_STR(energy-cores.unit, rapl_cores_unit, "Joules");
+RAPL_EVENT_ATTR_STR(energy-pkg.unit , rapl_pkg_unit, "Joules");
+RAPL_EVENT_ATTR_STR(energy-ram.unit , rapl_ram_unit, "Joules");
+RAPL_EVENT_ATTR_STR(energy-gpu.unit , rapl_gpu_unit, "Joules");
+RAPL_EVENT_ATTR_STR(energy-psys.unit, rapl_psys_unit, "Joules");
+
+/*
+ * we compute in 0.23 nJ increments regardless of MSR
+ */
+RAPL_EVENT_ATTR_STR(energy-cores.scale, rapl_cores_scale, "2.3283064365386962890625e-10");
+RAPL_EVENT_ATTR_STR(energy-pkg.scale, rapl_pkg_scale, "2.3283064365386962890625e-10");
+RAPL_EVENT_ATTR_STR(energy-ram.scale, rapl_ram_scale, "2.3283064365386962890625e-10");
+RAPL_EVENT_ATTR_STR(energy-gpu.scale, rapl_gpu_scale, "2.3283064365386962890625e-10");
+RAPL_EVENT_ATTR_STR(energy-psys.scale, rapl_psys_scale, "2.3283064365386962890625e-10");
+
+/*
+ * There are no default events, but we need to create
+ * "events" group (with empty attrs) before updating
+ * it with detected events.
+ */
+static struct attribute *attrs_empty[] = {
+ NULL,
+};
+
+static struct attribute_group rapl_pmu_events_group = {
+ .name = "events",
+ .attrs = attrs_empty,
+};
+
+DEFINE_RAPL_FORMAT_ATTR(event, event, "config:0-7");
+static struct attribute *rapl_formats_attr[] = {
+ &format_attr_event.attr,
+ NULL,
+};
+
+static struct attribute_group rapl_pmu_format_group = {
+ .name = "format",
+ .attrs = rapl_formats_attr,
+};
+
+static const struct attribute_group *rapl_attr_groups[] = {
+ &rapl_pmu_attr_group,
+ &rapl_pmu_format_group,
+ &rapl_pmu_events_group,
+ NULL,
+};
+
+static struct attribute *rapl_events_cores[] = {
+ EVENT_PTR(rapl_cores),
+ EVENT_PTR(rapl_cores_unit),
+ EVENT_PTR(rapl_cores_scale),
+ NULL,
+};
+
+static umode_t
+rapl_not_visible(struct kobject *kobj, struct attribute *attr, int i)
+{
+ return 0;
+}
+
+static struct attribute_group rapl_events_cores_group = {
+ .name = "events",
+ .attrs = rapl_events_cores,
+ .is_visible = rapl_not_visible,
+};
+
+static struct attribute *rapl_events_pkg[] = {
+ EVENT_PTR(rapl_pkg),
+ EVENT_PTR(rapl_pkg_unit),
+ EVENT_PTR(rapl_pkg_scale),
+ NULL,
+};
+
+static struct attribute_group rapl_events_pkg_group = {
+ .name = "events",
+ .attrs = rapl_events_pkg,
+ .is_visible = rapl_not_visible,
+};
+
+static struct attribute *rapl_events_ram[] = {
+ EVENT_PTR(rapl_ram),
+ EVENT_PTR(rapl_ram_unit),
+ EVENT_PTR(rapl_ram_scale),
+ NULL,
+};
+
+static struct attribute_group rapl_events_ram_group = {
+ .name = "events",
+ .attrs = rapl_events_ram,
+ .is_visible = rapl_not_visible,
+};
+
+static struct attribute *rapl_events_gpu[] = {
+ EVENT_PTR(rapl_gpu),
+ EVENT_PTR(rapl_gpu_unit),
+ EVENT_PTR(rapl_gpu_scale),
+ NULL,
+};
+
+static struct attribute_group rapl_events_gpu_group = {
+ .name = "events",
+ .attrs = rapl_events_gpu,
+ .is_visible = rapl_not_visible,
+};
+
+static struct attribute *rapl_events_psys[] = {
+ EVENT_PTR(rapl_psys),
+ EVENT_PTR(rapl_psys_unit),
+ EVENT_PTR(rapl_psys_scale),
+ NULL,
+};
+
+static struct attribute_group rapl_events_psys_group = {
+ .name = "events",
+ .attrs = rapl_events_psys,
+ .is_visible = rapl_not_visible,
+};
+
+static bool test_msr(int idx, void *data)
+{
+ return test_bit(idx, (unsigned long *) data);
+}
+
+static struct perf_msr intel_rapl_msrs[] = {
+ [PERF_RAPL_PP0] = { MSR_PP0_ENERGY_STATUS, &rapl_events_cores_group, test_msr },
+ [PERF_RAPL_PKG] = { MSR_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr },
+ [PERF_RAPL_RAM] = { MSR_DRAM_ENERGY_STATUS, &rapl_events_ram_group, test_msr },
+ [PERF_RAPL_PP1] = { MSR_PP1_ENERGY_STATUS, &rapl_events_gpu_group, test_msr },
+ [PERF_RAPL_PSYS] = { MSR_PLATFORM_ENERGY_STATUS, &rapl_events_psys_group, test_msr },
+};
+
+/*
+ * Force to PERF_RAPL_MAX size due to:
+ * - perf_msr_probe(PERF_RAPL_MAX)
+ * - want to use same event codes across both architectures
+ */
+static struct perf_msr amd_rapl_msrs[PERF_RAPL_MAX] = {
+ [PERF_RAPL_PKG] = { MSR_AMD_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr },
+};
+
+
+static int rapl_cpu_offline(unsigned int cpu)
+{
+ struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu);
+ int target;
+
+ /* Check if exiting cpu is used for collecting rapl events */
+ if (!cpumask_test_and_clear_cpu(cpu, &rapl_cpu_mask))
+ return 0;
+
+ pmu->cpu = -1;
+ /* Find a new cpu to collect rapl events */
+ target = cpumask_any_but(topology_die_cpumask(cpu), cpu);
+
+ /* Migrate rapl events to the new target */
+ if (target < nr_cpu_ids) {
+ cpumask_set_cpu(target, &rapl_cpu_mask);
+ pmu->cpu = target;
+ perf_pmu_migrate_context(pmu->pmu, cpu, target);
+ }
+ return 0;
+}
+
+static int rapl_cpu_online(unsigned int cpu)
+{
+ struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu);
+ int target;
+
+ if (!pmu) {
+ pmu = kzalloc_node(sizeof(*pmu), GFP_KERNEL, cpu_to_node(cpu));
+ if (!pmu)
+ return -ENOMEM;
+
+ raw_spin_lock_init(&pmu->lock);
+ INIT_LIST_HEAD(&pmu->active_list);
+ pmu->pmu = &rapl_pmus->pmu;
+ pmu->timer_interval = ms_to_ktime(rapl_timer_ms);
+ rapl_hrtimer_init(pmu);
+
+ rapl_pmus->pmus[topology_logical_die_id(cpu)] = pmu;
+ }
+
+ /*
+ * Check if there is an online cpu in the package which collects rapl
+ * events already.
+ */
+ target = cpumask_any_and(&rapl_cpu_mask, topology_die_cpumask(cpu));
+ if (target < nr_cpu_ids)
+ return 0;
+
+ cpumask_set_cpu(cpu, &rapl_cpu_mask);
+ pmu->cpu = cpu;
+ return 0;
+}
+
+static int rapl_check_hw_unit(struct rapl_model *rm)
+{
+ u64 msr_rapl_power_unit_bits;
+ int i;
+
+ /* protect rdmsrl() to handle virtualization */
+ if (rdmsrl_safe(rm->msr_power_unit, &msr_rapl_power_unit_bits))
+ return -1;
+ for (i = 0; i < NR_RAPL_DOMAINS; i++)
+ rapl_hw_unit[i] = (msr_rapl_power_unit_bits >> 8) & 0x1FULL;
+
+ /*
+ * DRAM domain on HSW server and KNL has fixed energy unit which can be
+ * different than the unit from power unit MSR. See
+ * "Intel Xeon Processor E5-1600 and E5-2600 v3 Product Families, V2
+ * of 2. Datasheet, September 2014, Reference Number: 330784-001 "
+ */
+ if (rm->apply_quirk)
+ rapl_hw_unit[PERF_RAPL_RAM] = 16;
+
+ /*
+ * Calculate the timer rate:
+ * Use reference of 200W for scaling the timeout to avoid counter
+ * overflows. 200W = 200 Joules/sec
+ * Divide interval by 2 to avoid lockstep (2 * 100)
+ * if hw unit is 32, then we use 2 ms 1/200/2
+ */
+ rapl_timer_ms = 2;
+ if (rapl_hw_unit[0] < 32) {
+ rapl_timer_ms = (1000 / (2 * 100));
+ rapl_timer_ms *= (1ULL << (32 - rapl_hw_unit[0] - 1));
+ }
+ return 0;
+}
+
+static void __init rapl_advertise(void)
+{
+ int i;
+
+ pr_info("API unit is 2^-32 Joules, %d fixed counters, %llu ms ovfl timer\n",
+ hweight32(rapl_cntr_mask), rapl_timer_ms);
+
+ for (i = 0; i < NR_RAPL_DOMAINS; i++) {
+ if (rapl_cntr_mask & (1 << i)) {
+ pr_info("hw unit of domain %s 2^-%d Joules\n",
+ rapl_domain_names[i], rapl_hw_unit[i]);
+ }
+ }
+}
+
+static void cleanup_rapl_pmus(void)
+{
+ int i;
+
+ for (i = 0; i < rapl_pmus->maxdie; i++)
+ kfree(rapl_pmus->pmus[i]);
+ kfree(rapl_pmus);
+}
+
+static const struct attribute_group *rapl_attr_update[] = {
+ &rapl_events_cores_group,
+ &rapl_events_pkg_group,
+ &rapl_events_ram_group,
+ &rapl_events_gpu_group,
+ &rapl_events_gpu_group,
+ NULL,
+};
+
+static int __init init_rapl_pmus(void)
+{
+ int maxdie = topology_max_packages() * topology_max_die_per_package();
+ size_t size;
+
+ size = sizeof(*rapl_pmus) + maxdie * sizeof(struct rapl_pmu *);
+ rapl_pmus = kzalloc(size, GFP_KERNEL);
+ if (!rapl_pmus)
+ return -ENOMEM;
+
+ rapl_pmus->maxdie = maxdie;
+ rapl_pmus->pmu.attr_groups = rapl_attr_groups;
+ rapl_pmus->pmu.attr_update = rapl_attr_update;
+ rapl_pmus->pmu.task_ctx_nr = perf_invalid_context;
+ rapl_pmus->pmu.event_init = rapl_pmu_event_init;
+ rapl_pmus->pmu.add = rapl_pmu_event_add;
+ rapl_pmus->pmu.del = rapl_pmu_event_del;
+ rapl_pmus->pmu.start = rapl_pmu_event_start;
+ rapl_pmus->pmu.stop = rapl_pmu_event_stop;
+ rapl_pmus->pmu.read = rapl_pmu_event_read;
+ rapl_pmus->pmu.module = THIS_MODULE;
+ rapl_pmus->pmu.capabilities = PERF_PMU_CAP_NO_EXCLUDE;
+ return 0;
+}
+
+static struct rapl_model model_snb = {
+ .events = BIT(PERF_RAPL_PP0) |
+ BIT(PERF_RAPL_PKG) |
+ BIT(PERF_RAPL_PP1),
+ .apply_quirk = false,
+ .msr_power_unit = MSR_RAPL_POWER_UNIT,
+ .rapl_msrs = intel_rapl_msrs,
+};
+
+static struct rapl_model model_snbep = {
+ .events = BIT(PERF_RAPL_PP0) |
+ BIT(PERF_RAPL_PKG) |
+ BIT(PERF_RAPL_RAM),
+ .apply_quirk = false,
+ .msr_power_unit = MSR_RAPL_POWER_UNIT,
+ .rapl_msrs = intel_rapl_msrs,
+};
+
+static struct rapl_model model_hsw = {
+ .events = BIT(PERF_RAPL_PP0) |
+ BIT(PERF_RAPL_PKG) |
+ BIT(PERF_RAPL_RAM) |
+ BIT(PERF_RAPL_PP1),
+ .apply_quirk = false,
+ .msr_power_unit = MSR_RAPL_POWER_UNIT,
+ .rapl_msrs = intel_rapl_msrs,
+};
+
+static struct rapl_model model_hsx = {
+ .events = BIT(PERF_RAPL_PP0) |
+ BIT(PERF_RAPL_PKG) |
+ BIT(PERF_RAPL_RAM),
+ .apply_quirk = true,
+ .msr_power_unit = MSR_RAPL_POWER_UNIT,
+ .rapl_msrs = intel_rapl_msrs,
+};
+
+static struct rapl_model model_knl = {
+ .events = BIT(PERF_RAPL_PKG) |
+ BIT(PERF_RAPL_RAM),
+ .apply_quirk = true,
+ .msr_power_unit = MSR_RAPL_POWER_UNIT,
+ .rapl_msrs = intel_rapl_msrs,
+};
+
+static struct rapl_model model_skl = {
+ .events = BIT(PERF_RAPL_PP0) |
+ BIT(PERF_RAPL_PKG) |
+ BIT(PERF_RAPL_RAM) |
+ BIT(PERF_RAPL_PP1) |
+ BIT(PERF_RAPL_PSYS),
+ .apply_quirk = false,
+ .msr_power_unit = MSR_RAPL_POWER_UNIT,
+ .rapl_msrs = intel_rapl_msrs,
+};
+
+static struct rapl_model model_amd_fam17h = {
+ .events = BIT(PERF_RAPL_PKG),
+ .apply_quirk = false,
+ .msr_power_unit = MSR_AMD_RAPL_POWER_UNIT,
+ .rapl_msrs = amd_rapl_msrs,
+};
+
+static const struct x86_cpu_id rapl_model_match[] __initconst = {
+ X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE, &model_snb),
+ X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE_X, &model_snbep),
+ X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE, &model_snb),
+ X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE_X, &model_snbep),
+ X86_MATCH_INTEL_FAM6_MODEL(HASWELL, &model_hsw),
+ X86_MATCH_INTEL_FAM6_MODEL(HASWELL_X, &model_hsx),
+ X86_MATCH_INTEL_FAM6_MODEL(HASWELL_L, &model_hsw),
+ X86_MATCH_INTEL_FAM6_MODEL(HASWELL_G, &model_hsw),
+ X86_MATCH_INTEL_FAM6_MODEL(BROADWELL, &model_hsw),
+ X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_G, &model_hsw),
+ X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_X, &model_hsx),
+ X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_D, &model_hsx),
+ X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNL, &model_knl),
+ X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNM, &model_knl),
+ X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_L, &model_skl),
+ X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE, &model_skl),
+ X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_X, &model_hsx),
+ X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE_L, &model_skl),
+ X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE, &model_skl),
+ X86_MATCH_INTEL_FAM6_MODEL(CANNONLAKE_L, &model_skl),
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, &model_hsw),
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_D, &model_hsw),
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_PLUS, &model_hsw),
+ X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_L, &model_skl),
+ X86_MATCH_INTEL_FAM6_MODEL(ICELAKE, &model_skl),
+ X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_D, &model_hsx),
+ X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X, &model_hsx),
+ X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE_L, &model_skl),
+ X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE, &model_skl),
+ X86_MATCH_VENDOR_FAM(AMD, 0x17, &model_amd_fam17h),
+ {},
+};
+MODULE_DEVICE_TABLE(x86cpu, rapl_model_match);
+
+static int __init rapl_pmu_init(void)
+{
+ const struct x86_cpu_id *id;
+ struct rapl_model *rm;
+ int ret;
+
+ id = x86_match_cpu(rapl_model_match);
+ if (!id)
+ return -ENODEV;
+
+ rm = (struct rapl_model *) id->driver_data;
+
+ rapl_msrs = rm->rapl_msrs;
+
+ rapl_cntr_mask = perf_msr_probe(rapl_msrs, PERF_RAPL_MAX,
+ false, (void *) &rm->events);
+
+ ret = rapl_check_hw_unit(rm);
+ if (ret)
+ return ret;
+
+ ret = init_rapl_pmus();
+ if (ret)
+ return ret;
+
+ /*
+ * Install callbacks. Core will call them for each online cpu.
+ */
+ ret = cpuhp_setup_state(CPUHP_AP_PERF_X86_RAPL_ONLINE,
+ "perf/x86/rapl:online",
+ rapl_cpu_online, rapl_cpu_offline);
+ if (ret)
+ goto out;
+
+ ret = perf_pmu_register(&rapl_pmus->pmu, "power", -1);
+ if (ret)
+ goto out1;
+
+ rapl_advertise();
+ return 0;
+
+out1:
+ cpuhp_remove_state(CPUHP_AP_PERF_X86_RAPL_ONLINE);
+out:
+ pr_warn("Initialization failed (%d), disabled\n", ret);
+ cleanup_rapl_pmus();
+ return ret;
+}
+module_init(rapl_pmu_init);
+
+static void __exit intel_rapl_exit(void)
+{
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_RAPL_ONLINE);
+ perf_pmu_unregister(&rapl_pmus->pmu);
+ cleanup_rapl_pmus();
+}
+module_exit(intel_rapl_exit);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.