2 * Performance events x86 architecture header
4 * Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de>
5 * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar
6 * Copyright (C) 2009 Jaswinder Singh Rajput
7 * Copyright (C) 2009 Advanced Micro Devices, Inc., Robert Richter
8 * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
9 * Copyright (C) 2009 Intel Corporation, <markus.t.metzger@intel.com>
10 * Copyright (C) 2009 Google, Inc., Stephane Eranian
12 * For licencing details see kernel-base/COPYING
15 #include <linux/perf_event.h>
19 * register -------------------------------
20 * | HT | no HT | HT | no HT |
21 *-----------------------------------------
22 * offcore | core | core | cpu | core |
23 * lbr_sel | core | core | cpu | core |
24 * ld_lat | cpu | core | cpu | core |
25 *-----------------------------------------
27 * Given that there is a small number of shared regs,
28 * we can pre-allocate their slot in the per-cpu
29 * per-core reg tables.
32 EXTRA_REG_NONE = -1, /* not used */
34 EXTRA_REG_RSP_0 = 0, /* offcore_response_0 */
35 EXTRA_REG_RSP_1 = 1, /* offcore_response_1 */
37 EXTRA_REG_MAX /* number of entries needed */
40 struct event_constraint {
42 unsigned long idxmsk[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
51 int nb_id; /* NorthBridge id */
52 int refcnt; /* reference count */
53 struct perf_event *owners[X86_PMC_IDX_MAX];
54 struct event_constraint event_constraints[X86_PMC_IDX_MAX];
57 /* The maximal number of PEBS events: */
58 #define MAX_PEBS_EVENTS 4
61 * A debug store configuration.
63 * We only support architectures that use 64bit fields.
68 u64 bts_absolute_maximum;
69 u64 bts_interrupt_threshold;
72 u64 pebs_absolute_maximum;
73 u64 pebs_interrupt_threshold;
74 u64 pebs_event_reset[MAX_PEBS_EVENTS];
81 raw_spinlock_t lock; /* per-core: protect structure */
82 u64 config; /* extra MSR config */
83 u64 reg; /* extra MSR number */
84 atomic_t ref; /* reference count */
90 * Used to coordinate shared registers between HT threads or
91 * among events on a single PMU.
93 struct intel_shared_regs {
94 struct er_account regs[EXTRA_REG_MAX];
95 int refcnt; /* per-core: #HT threads */
96 unsigned core_id; /* per-core: core id */
99 #define MAX_LBR_ENTRIES 16
101 struct cpu_hw_events {
103 * Generic x86 PMC bits
105 struct perf_event *events[X86_PMC_IDX_MAX]; /* in counter order */
106 unsigned long active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
107 unsigned long running[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
113 int assign[X86_PMC_IDX_MAX]; /* event to counter assignment */
114 u64 tags[X86_PMC_IDX_MAX];
115 struct perf_event *event_list[X86_PMC_IDX_MAX]; /* in enabled order */
117 unsigned int group_flag;
120 * Intel DebugStore bits
122 struct debug_store *ds;
130 struct perf_branch_stack lbr_stack;
131 struct perf_branch_entry lbr_entries[MAX_LBR_ENTRIES];
134 * manage shared (per-core, per-cpu) registers
135 * used on Intel NHM/WSM/SNB
137 struct intel_shared_regs *shared_regs;
142 struct amd_nb *amd_nb;
144 void *kfree_on_online;
147 #define __EVENT_CONSTRAINT(c, n, m, w) {\
148 { .idxmsk64 = (n) }, \
154 #define EVENT_CONSTRAINT(c, n, m) \
155 __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n))
158 * Constraint on the Event code.
160 #define INTEL_EVENT_CONSTRAINT(c, n) \
161 EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT)
164 * Constraint on the Event code + UMask + fixed-mask
166 * filter mask to validate fixed counter events.
167 * the following filters disqualify for fixed counters:
171 * The other filters are supported by fixed counters.
172 * The any-thread option is supported starting with v3.
174 #define FIXED_EVENT_CONSTRAINT(c, n) \
175 EVENT_CONSTRAINT(c, (1ULL << (32+n)), X86_RAW_EVENT_MASK)
178 * Constraint on the Event code + UMask
180 #define INTEL_UEVENT_CONSTRAINT(c, n) \
181 EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK)
183 #define EVENT_CONSTRAINT_END \
184 EVENT_CONSTRAINT(0, 0, 0)
186 #define for_each_event_constraint(e, c) \
187 for ((e) = (c); (e)->weight; (e)++)
190 * Extra registers for specific events.
192 * Some events need large masks and require external MSRs.
193 * Those extra MSRs end up being shared for all events on
194 * a PMU and sometimes between PMU of sibling HT threads.
195 * In either case, the kernel needs to handle conflicting
196 * accesses to those extra, shared, regs. The data structure
197 * to manage those registers is stored in cpu_hw_event.
204 int idx; /* per_xxx->regs[] reg index */
207 #define EVENT_EXTRA_REG(e, ms, m, vm, i) { \
210 .config_mask = (m), \
211 .valid_mask = (vm), \
212 .idx = EXTRA_REG_##i \
215 #define INTEL_EVENT_EXTRA_REG(event, msr, vm, idx) \
216 EVENT_EXTRA_REG(event, msr, ARCH_PERFMON_EVENTSEL_EVENT, vm, idx)
218 #define EVENT_EXTRA_END EVENT_EXTRA_REG(0, 0, 0, 0, RSP_0)
220 union perf_capabilities {
232 * struct x86_pmu - generic x86 pmu
236 * Generic x86 PMC bits
240 int (*handle_irq)(struct pt_regs *);
241 void (*disable_all)(void);
242 void (*enable_all)(int added);
243 void (*enable)(struct perf_event *);
244 void (*disable)(struct perf_event *);
245 int (*hw_config)(struct perf_event *event);
246 int (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign);
249 u64 (*event_map)(int);
252 int num_counters_fixed;
257 struct event_constraint *
258 (*get_event_constraints)(struct cpu_hw_events *cpuc,
259 struct perf_event *event);
261 void (*put_event_constraints)(struct cpu_hw_events *cpuc,
262 struct perf_event *event);
263 struct event_constraint *event_constraints;
264 void (*quirks)(void);
265 int perfctr_second_write;
267 int (*cpu_prepare)(int cpu);
268 void (*cpu_starting)(int cpu);
269 void (*cpu_dying)(int cpu);
270 void (*cpu_dead)(int cpu);
273 * Intel Arch Perfmon v2+
276 union perf_capabilities intel_cap;
279 * Intel DebugStore bits
282 int bts_active, pebs_active;
283 int pebs_record_size;
284 void (*drain_pebs)(struct pt_regs *regs);
285 struct event_constraint *pebs_constraints;
290 unsigned long lbr_tos, lbr_from, lbr_to; /* MSR base regs */
291 int lbr_nr; /* hardware stack size */
294 * Extra registers for events
296 struct extra_reg *extra_regs;
297 unsigned int er_flags;
300 #define ERF_NO_HT_SHARING 1
301 #define ERF_HAS_RSP_1 2
303 extern struct x86_pmu x86_pmu __read_mostly;
305 DECLARE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
307 int x86_perf_event_set_period(struct perf_event *event);
310 * Generalized hw caching related hw_event table, filled
311 * in on a per model basis. A value of 0 means
312 * 'not supported', -1 means 'hw_event makes no sense on
313 * this CPU', any other value means the raw hw_event
317 #define C(x) PERF_COUNT_HW_CACHE_##x
319 extern u64 __read_mostly hw_cache_event_ids
320 [PERF_COUNT_HW_CACHE_MAX]
321 [PERF_COUNT_HW_CACHE_OP_MAX]
322 [PERF_COUNT_HW_CACHE_RESULT_MAX];
323 extern u64 __read_mostly hw_cache_extra_regs
324 [PERF_COUNT_HW_CACHE_MAX]
325 [PERF_COUNT_HW_CACHE_OP_MAX]
326 [PERF_COUNT_HW_CACHE_RESULT_MAX];
328 u64 x86_perf_event_update(struct perf_event *event);
330 static inline int x86_pmu_addr_offset(int index)
334 /* offset = X86_FEATURE_PERFCTR_CORE ? index << 1 : index */
335 alternative_io(ASM_NOP2,
337 X86_FEATURE_PERFCTR_CORE,
344 static inline unsigned int x86_pmu_config_addr(int index)
346 return x86_pmu.eventsel + x86_pmu_addr_offset(index);
349 static inline unsigned int x86_pmu_event_addr(int index)
351 return x86_pmu.perfctr + x86_pmu_addr_offset(index);
354 int x86_setup_perfctr(struct perf_event *event);
356 int x86_pmu_hw_config(struct perf_event *event);
358 void x86_pmu_disable_all(void);
360 static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc,
363 if (hwc->extra_reg.reg)
364 wrmsrl(hwc->extra_reg.reg, hwc->extra_reg.config);
365 wrmsrl(hwc->config_base, hwc->config | enable_mask);
368 void x86_pmu_enable_all(int added);
370 int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign);
372 void x86_pmu_stop(struct perf_event *event, int flags);
374 static inline void x86_pmu_disable_event(struct perf_event *event)
376 struct hw_perf_event *hwc = &event->hw;
378 wrmsrl(hwc->config_base, hwc->config);
381 void x86_pmu_enable_event(struct perf_event *event);
383 int x86_pmu_handle_irq(struct pt_regs *regs);
385 extern struct event_constraint emptyconstraint;
387 extern struct event_constraint unconstrained;
389 #ifdef CONFIG_CPU_SUP_AMD
391 int amd_pmu_init(void);
393 #else /* CONFIG_CPU_SUP_AMD */
395 static inline int amd_pmu_init(void)
400 #endif /* CONFIG_CPU_SUP_AMD */
402 #ifdef CONFIG_CPU_SUP_INTEL
404 int intel_pmu_save_and_restart(struct perf_event *event);
406 struct event_constraint *
407 x86_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event);
409 struct intel_shared_regs *allocate_shared_regs(int cpu);
411 int intel_pmu_init(void);
413 void init_debug_store_on_cpu(int cpu);
415 void fini_debug_store_on_cpu(int cpu);
417 void release_ds_buffers(void);
419 void reserve_ds_buffers(void);
421 extern struct event_constraint bts_constraint;
423 void intel_pmu_enable_bts(u64 config);
425 void intel_pmu_disable_bts(void);
427 int intel_pmu_drain_bts_buffer(void);
429 extern struct event_constraint intel_core2_pebs_event_constraints[];
431 extern struct event_constraint intel_atom_pebs_event_constraints[];
433 extern struct event_constraint intel_nehalem_pebs_event_constraints[];
435 extern struct event_constraint intel_westmere_pebs_event_constraints[];
437 extern struct event_constraint intel_snb_pebs_event_constraints[];
439 struct event_constraint *intel_pebs_constraints(struct perf_event *event);
441 void intel_pmu_pebs_enable(struct perf_event *event);
443 void intel_pmu_pebs_disable(struct perf_event *event);
445 void intel_pmu_pebs_enable_all(void);
447 void intel_pmu_pebs_disable_all(void);
449 void intel_ds_init(void);
451 void intel_pmu_lbr_reset(void);
453 void intel_pmu_lbr_enable(struct perf_event *event);
455 void intel_pmu_lbr_disable(struct perf_event *event);
457 void intel_pmu_lbr_enable_all(void);
459 void intel_pmu_lbr_disable_all(void);
461 void intel_pmu_lbr_read(void);
463 void intel_pmu_lbr_init_core(void);
465 void intel_pmu_lbr_init_nhm(void);
467 void intel_pmu_lbr_init_atom(void);
469 int p4_pmu_init(void);
471 int p6_pmu_init(void);
473 #else /* CONFIG_CPU_SUP_INTEL */
475 static inline void reserve_ds_buffers(void)
479 static inline void release_ds_buffers(void)
483 static inline int intel_pmu_init(void)
488 static inline struct intel_shared_regs *allocate_shared_regs(int cpu)
493 #endif /* CONFIG_CPU_SUP_INTEL */