diff options
Diffstat (limited to 'arch/x86/events/perf_event.h')
| -rw-r--r-- | arch/x86/events/perf_event.h | 1306 |
1 files changed, 1306 insertions, 0 deletions
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h new file mode 100644 index 000000000..0c3b8fa7e --- /dev/null +++ b/arch/x86/events/perf_event.h @@ -0,0 +1,1306 @@ +/* + * Performance events x86 architecture header + * + * Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de> + * Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar + * Copyright (C) 2009 Jaswinder Singh Rajput + * Copyright (C) 2009 Advanced Micro Devices, Inc., Robert Richter + * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra + * Copyright (C) 2009 Intel Corporation, <markus.t.metzger@intel.com> + * Copyright (C) 2009 Google, Inc., Stephane Eranian + * + * For licencing details see kernel-base/COPYING + */ + +#include <linux/perf_event.h> + +#include <asm/intel_ds.h> + +/* To enable MSR tracing please use the generic trace points. */ + +/* + * | NHM/WSM | SNB | + * register ------------------------------- + * | HT | no HT | HT | no HT | + *----------------------------------------- + * offcore | core | core | cpu | core | + * lbr_sel | core | core | cpu | core | + * ld_lat | cpu | core | cpu | core | + *----------------------------------------- + * + * Given that there is a small number of shared regs, + * we can pre-allocate their slot in the per-cpu + * per-core reg tables. + */ +enum extra_reg_type { + EXTRA_REG_NONE = -1, /* not used */ + + EXTRA_REG_RSP_0 = 0, /* offcore_response_0 */ + EXTRA_REG_RSP_1 = 1, /* offcore_response_1 */ + EXTRA_REG_LBR = 2, /* lbr_select */ + EXTRA_REG_LDLAT = 3, /* ld_lat_threshold */ + EXTRA_REG_FE = 4, /* fe_* */ + + EXTRA_REG_MAX /* number of entries needed */ +}; + +struct event_constraint { + union { + unsigned long idxmsk[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; + u64 idxmsk64; + }; + u64 code; + u64 cmask; + int weight; + int overlap; + int flags; + unsigned int size; +}; + +static inline bool constraint_match(struct event_constraint *c, u64 ecode) +{ + return ((ecode & c->cmask) - c->code) <= (u64)c->size; +} + +/* + * struct hw_perf_event.flags flags + */ +#define PERF_X86_EVENT_PEBS_LDLAT 0x0001 /* ld+ldlat data address sampling */ +#define PERF_X86_EVENT_PEBS_ST 0x0002 /* st data address sampling */ +#define PERF_X86_EVENT_PEBS_ST_HSW 0x0004 /* haswell style datala, store */ +#define PERF_X86_EVENT_PEBS_LD_HSW 0x0008 /* haswell style datala, load */ +#define PERF_X86_EVENT_PEBS_NA_HSW 0x0010 /* haswell style datala, unknown */ +#define PERF_X86_EVENT_EXCL 0x0020 /* HT exclusivity on counter */ +#define PERF_X86_EVENT_DYNAMIC 0x0040 /* dynamic alloc'd constraint */ +#define PERF_X86_EVENT_RDPMC_ALLOWED 0x0080 /* grant rdpmc permission */ +#define PERF_X86_EVENT_EXCL_ACCT 0x0100 /* accounted EXCL event */ +#define PERF_X86_EVENT_AUTO_RELOAD 0x0200 /* use PEBS auto-reload */ +#define PERF_X86_EVENT_LARGE_PEBS 0x0400 /* use large PEBS */ +#define PERF_X86_EVENT_PEBS_VIA_PT 0x0800 /* use PT buffer for PEBS */ +#define PERF_X86_EVENT_PAIR 0x1000 /* Large Increment per Cycle */ +#define PERF_X86_EVENT_LBR_SELECT 0x2000 /* Save/Restore MSR_LBR_SELECT */ +#define PERF_X86_EVENT_TOPDOWN 0x4000 /* Count Topdown slots/metrics events */ + +static inline bool is_topdown_count(struct perf_event *event) +{ + return event->hw.flags & PERF_X86_EVENT_TOPDOWN; +} + +static inline bool is_metric_event(struct perf_event *event) +{ + u64 config = event->attr.config; + + return ((config & ARCH_PERFMON_EVENTSEL_EVENT) == 0) && + ((config & INTEL_ARCH_EVENT_MASK) >= INTEL_TD_METRIC_RETIRING) && + ((config & INTEL_ARCH_EVENT_MASK) <= INTEL_TD_METRIC_MAX); +} + +static inline bool is_slots_event(struct perf_event *event) +{ + return (event->attr.config & INTEL_ARCH_EVENT_MASK) == INTEL_TD_SLOTS; +} + +static inline bool is_topdown_event(struct perf_event *event) +{ + return is_metric_event(event) || is_slots_event(event); +} + +struct amd_nb { + int nb_id; /* NorthBridge id */ + int refcnt; /* reference count */ + struct perf_event *owners[X86_PMC_IDX_MAX]; + struct event_constraint event_constraints[X86_PMC_IDX_MAX]; +}; + +#define PEBS_COUNTER_MASK ((1ULL << MAX_PEBS_EVENTS) - 1) +#define PEBS_PMI_AFTER_EACH_RECORD BIT_ULL(60) +#define PEBS_OUTPUT_OFFSET 61 +#define PEBS_OUTPUT_MASK (3ull << PEBS_OUTPUT_OFFSET) +#define PEBS_OUTPUT_PT (1ull << PEBS_OUTPUT_OFFSET) +#define PEBS_VIA_PT_MASK (PEBS_OUTPUT_PT | PEBS_PMI_AFTER_EACH_RECORD) + +/* + * Flags PEBS can handle without an PMI. + * + * TID can only be handled by flushing at context switch. + * REGS_USER can be handled for events limited to ring 3. + * + */ +#define LARGE_PEBS_FLAGS \ + (PERF_SAMPLE_IP | PERF_SAMPLE_TID | PERF_SAMPLE_ADDR | \ + PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_STREAM_ID | \ + PERF_SAMPLE_DATA_SRC | PERF_SAMPLE_IDENTIFIER | \ + PERF_SAMPLE_TRANSACTION | PERF_SAMPLE_PHYS_ADDR | \ + PERF_SAMPLE_REGS_INTR | PERF_SAMPLE_REGS_USER | \ + PERF_SAMPLE_PERIOD) + +#define PEBS_GP_REGS \ + ((1ULL << PERF_REG_X86_AX) | \ + (1ULL << PERF_REG_X86_BX) | \ + (1ULL << PERF_REG_X86_CX) | \ + (1ULL << PERF_REG_X86_DX) | \ + (1ULL << PERF_REG_X86_DI) | \ + (1ULL << PERF_REG_X86_SI) | \ + (1ULL << PERF_REG_X86_SP) | \ + (1ULL << PERF_REG_X86_BP) | \ + (1ULL << PERF_REG_X86_IP) | \ + (1ULL << PERF_REG_X86_FLAGS) | \ + (1ULL << PERF_REG_X86_R8) | \ + (1ULL << PERF_REG_X86_R9) | \ + (1ULL << PERF_REG_X86_R10) | \ + (1ULL << PERF_REG_X86_R11) | \ + (1ULL << PERF_REG_X86_R12) | \ + (1ULL << PERF_REG_X86_R13) | \ + (1ULL << PERF_REG_X86_R14) | \ + (1ULL << PERF_REG_X86_R15)) + +/* + * Per register state. + */ +struct er_account { + raw_spinlock_t lock; /* per-core: protect structure */ + u64 config; /* extra MSR config */ + u64 reg; /* extra MSR number */ + atomic_t ref; /* reference count */ +}; + +/* + * Per core/cpu state + * + * Used to coordinate shared registers between HT threads or + * among events on a single PMU. + */ +struct intel_shared_regs { + struct er_account regs[EXTRA_REG_MAX]; + int refcnt; /* per-core: #HT threads */ + unsigned core_id; /* per-core: core id */ +}; + +enum intel_excl_state_type { + INTEL_EXCL_UNUSED = 0, /* counter is unused */ + INTEL_EXCL_SHARED = 1, /* counter can be used by both threads */ + INTEL_EXCL_EXCLUSIVE = 2, /* counter can be used by one thread only */ +}; + +struct intel_excl_states { + enum intel_excl_state_type state[X86_PMC_IDX_MAX]; + bool sched_started; /* true if scheduling has started */ +}; + +struct intel_excl_cntrs { + raw_spinlock_t lock; + + struct intel_excl_states states[2]; + + union { + u16 has_exclusive[2]; + u32 exclusive_present; + }; + + int refcnt; /* per-core: #HT threads */ + unsigned core_id; /* per-core: core id */ +}; + +struct x86_perf_task_context; +#define MAX_LBR_ENTRIES 32 + +enum { + LBR_FORMAT_32 = 0x00, + LBR_FORMAT_LIP = 0x01, + LBR_FORMAT_EIP = 0x02, + LBR_FORMAT_EIP_FLAGS = 0x03, + LBR_FORMAT_EIP_FLAGS2 = 0x04, + LBR_FORMAT_INFO = 0x05, + LBR_FORMAT_TIME = 0x06, + LBR_FORMAT_MAX_KNOWN = LBR_FORMAT_TIME, +}; + +enum { + X86_PERF_KFREE_SHARED = 0, + X86_PERF_KFREE_EXCL = 1, + X86_PERF_KFREE_MAX +}; + +struct cpu_hw_events { + /* + * Generic x86 PMC bits + */ + struct perf_event *events[X86_PMC_IDX_MAX]; /* in counter order */ + unsigned long active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; + unsigned long running[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; + int enabled; + + int n_events; /* the # of events in the below arrays */ + int n_added; /* the # last events in the below arrays; + they've never been enabled yet */ + int n_txn; /* the # last events in the below arrays; + added in the current transaction */ + int n_txn_pair; + int n_txn_metric; + int assign[X86_PMC_IDX_MAX]; /* event to counter assignment */ + u64 tags[X86_PMC_IDX_MAX]; + + struct perf_event *event_list[X86_PMC_IDX_MAX]; /* in enabled order */ + struct event_constraint *event_constraint[X86_PMC_IDX_MAX]; + + int n_excl; /* the number of exclusive events */ + + unsigned int txn_flags; + int is_fake; + + /* + * Intel DebugStore bits + */ + struct debug_store *ds; + void *ds_pebs_vaddr; + void *ds_bts_vaddr; + u64 pebs_enabled; + int n_pebs; + int n_large_pebs; + int n_pebs_via_pt; + int pebs_output; + + /* Current super set of events hardware configuration */ + u64 pebs_data_cfg; + u64 active_pebs_data_cfg; + int pebs_record_size; + + /* + * Intel LBR bits + */ + int lbr_users; + int lbr_pebs_users; + struct perf_branch_stack lbr_stack; + struct perf_branch_entry lbr_entries[MAX_LBR_ENTRIES]; + union { + struct er_account *lbr_sel; + struct er_account *lbr_ctl; + }; + u64 br_sel; + void *last_task_ctx; + int last_log_id; + int lbr_select; + void *lbr_xsave; + + /* + * Intel host/guest exclude bits + */ + u64 intel_ctrl_guest_mask; + u64 intel_ctrl_host_mask; + struct perf_guest_switch_msr guest_switch_msrs[X86_PMC_IDX_MAX]; + + /* + * Intel checkpoint mask + */ + u64 intel_cp_status; + + /* + * manage shared (per-core, per-cpu) registers + * used on Intel NHM/WSM/SNB + */ + struct intel_shared_regs *shared_regs; + /* + * manage exclusive counter access between hyperthread + */ + struct event_constraint *constraint_list; /* in enable order */ + struct intel_excl_cntrs *excl_cntrs; + int excl_thread_id; /* 0 or 1 */ + + /* + * SKL TSX_FORCE_ABORT shadow + */ + u64 tfa_shadow; + + /* + * Perf Metrics + */ + /* number of accepted metrics events */ + int n_metric; + + /* + * AMD specific bits + */ + struct amd_nb *amd_nb; + /* Inverted mask of bits to clear in the perf_ctr ctrl registers */ + u64 perf_ctr_virt_mask; + int n_pair; /* Large increment events */ + + void *kfree_on_online[X86_PERF_KFREE_MAX]; + + struct pmu *pmu; +}; + +#define __EVENT_CONSTRAINT_RANGE(c, e, n, m, w, o, f) { \ + { .idxmsk64 = (n) }, \ + .code = (c), \ + .size = (e) - (c), \ + .cmask = (m), \ + .weight = (w), \ + .overlap = (o), \ + .flags = f, \ +} + +#define __EVENT_CONSTRAINT(c, n, m, w, o, f) \ + __EVENT_CONSTRAINT_RANGE(c, c, n, m, w, o, f) + +#define EVENT_CONSTRAINT(c, n, m) \ + __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 0, 0) + +/* + * The constraint_match() function only works for 'simple' event codes + * and not for extended (AMD64_EVENTSEL_EVENT) events codes. + */ +#define EVENT_CONSTRAINT_RANGE(c, e, n, m) \ + __EVENT_CONSTRAINT_RANGE(c, e, n, m, HWEIGHT(n), 0, 0) + +#define INTEL_EXCLEVT_CONSTRAINT(c, n) \ + __EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT, HWEIGHT(n),\ + 0, PERF_X86_EVENT_EXCL) + +/* + * The overlap flag marks event constraints with overlapping counter + * masks. This is the case if the counter mask of such an event is not + * a subset of any other counter mask of a constraint with an equal or + * higher weight, e.g.: + * + * c_overlaps = EVENT_CONSTRAINT_OVERLAP(0, 0x09, 0); + * c_another1 = EVENT_CONSTRAINT(0, 0x07, 0); + * c_another2 = EVENT_CONSTRAINT(0, 0x38, 0); + * + * The event scheduler may not select the correct counter in the first + * cycle because it needs to know which subsequent events will be + * scheduled. It may fail to schedule the events then. So we set the + * overlap flag for such constraints to give the scheduler a hint which + * events to select for counter rescheduling. + * + * Care must be taken as the rescheduling algorithm is O(n!) which + * will increase scheduling cycles for an over-committed system + * dramatically. The number of such EVENT_CONSTRAINT_OVERLAP() macros + * and its counter masks must be kept at a minimum. + */ +#define EVENT_CONSTRAINT_OVERLAP(c, n, m) \ + __EVENT_CONSTRAINT(c, n, m, HWEIGHT(n), 1, 0) + +/* + * Constraint on the Event code. + */ +#define INTEL_EVENT_CONSTRAINT(c, n) \ + EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT) + +/* + * Constraint on a range of Event codes + */ +#define INTEL_EVENT_CONSTRAINT_RANGE(c, e, n) \ + EVENT_CONSTRAINT_RANGE(c, e, n, ARCH_PERFMON_EVENTSEL_EVENT) + +/* + * Constraint on the Event code + UMask + fixed-mask + * + * filter mask to validate fixed counter events. + * the following filters disqualify for fixed counters: + * - inv + * - edge + * - cnt-mask + * - in_tx + * - in_tx_checkpointed + * The other filters are supported by fixed counters. + * The any-thread option is supported starting with v3. + */ +#define FIXED_EVENT_FLAGS (X86_RAW_EVENT_MASK|HSW_IN_TX|HSW_IN_TX_CHECKPOINTED) +#define FIXED_EVENT_CONSTRAINT(c, n) \ + EVENT_CONSTRAINT(c, (1ULL << (32+n)), FIXED_EVENT_FLAGS) + +/* + * The special metric counters do not actually exist. They are calculated from + * the combination of the FxCtr3 + MSR_PERF_METRICS. + * + * The special metric counters are mapped to a dummy offset for the scheduler. + * The sharing between multiple users of the same metric without multiplexing + * is not allowed, even though the hardware supports that in principle. + */ + +#define METRIC_EVENT_CONSTRAINT(c, n) \ + EVENT_CONSTRAINT(c, (1ULL << (INTEL_PMC_IDX_METRIC_BASE + n)), \ + INTEL_ARCH_EVENT_MASK) + +/* + * Constraint on the Event code + UMask + */ +#define INTEL_UEVENT_CONSTRAINT(c, n) \ + EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK) + +/* Constraint on specific umask bit only + event */ +#define INTEL_UBIT_EVENT_CONSTRAINT(c, n) \ + EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT|(c)) + +/* Like UEVENT_CONSTRAINT, but match flags too */ +#define INTEL_FLAGS_UEVENT_CONSTRAINT(c, n) \ + EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS) + +#define INTEL_EXCLUEVT_CONSTRAINT(c, n) \ + __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK, \ + HWEIGHT(n), 0, PERF_X86_EVENT_EXCL) + +#define INTEL_PLD_CONSTRAINT(c, n) \ + __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LDLAT) + +#define INTEL_PST_CONSTRAINT(c, n) \ + __EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST) + +/* Event constraint, but match on all event flags too. */ +#define INTEL_FLAGS_EVENT_CONSTRAINT(c, n) \ + EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS) + +#define INTEL_FLAGS_EVENT_CONSTRAINT_RANGE(c, e, n) \ + EVENT_CONSTRAINT_RANGE(c, e, n, ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS) + +/* Check only flags, but allow all event/umask */ +#define INTEL_ALL_EVENT_CONSTRAINT(code, n) \ + EVENT_CONSTRAINT(code, n, X86_ALL_EVENT_FLAGS) + +/* Check flags and event code, and set the HSW store flag */ +#define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_ST(code, n) \ + __EVENT_CONSTRAINT(code, n, \ + ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST_HSW) + +/* Check flags and event code, and set the HSW load flag */ +#define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(code, n) \ + __EVENT_CONSTRAINT(code, n, \ + ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LD_HSW) + +#define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD_RANGE(code, end, n) \ + __EVENT_CONSTRAINT_RANGE(code, end, n, \ + ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LD_HSW) + +#define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(code, n) \ + __EVENT_CONSTRAINT(code, n, \ + ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, \ + PERF_X86_EVENT_PEBS_LD_HSW|PERF_X86_EVENT_EXCL) + +/* Check flags and event code/umask, and set the HSW store flag */ +#define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(code, n) \ + __EVENT_CONSTRAINT(code, n, \ + INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST_HSW) + +#define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(code, n) \ + __EVENT_CONSTRAINT(code, n, \ + INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, \ + PERF_X86_EVENT_PEBS_ST_HSW|PERF_X86_EVENT_EXCL) + +/* Check flags and event code/umask, and set the HSW load flag */ +#define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(code, n) \ + __EVENT_CONSTRAINT(code, n, \ + INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LD_HSW) + +#define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(code, n) \ + __EVENT_CONSTRAINT(code, n, \ + INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, \ + PERF_X86_EVENT_PEBS_LD_HSW|PERF_X86_EVENT_EXCL) + +/* Check flags and event code/umask, and set the HSW N/A flag */ +#define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_NA(code, n) \ + __EVENT_CONSTRAINT(code, n, \ + INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \ + HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_NA_HSW) + + +/* + * We define the end marker as having a weight of -1 + * to enable blacklisting of events using a counter bitmask + * of zero and thus a weight of zero. + * The end marker has a weight that cannot possibly be + * obtained from counting the bits in the bitmask. + */ +#define EVENT_CONSTRAINT_END { .weight = -1 } + +/* + * Check for end marker with weight == -1 + */ +#define for_each_event_constraint(e, c) \ + for ((e) = (c); (e)->weight != -1; (e)++) + +/* + * Extra registers for specific events. + * + * Some events need large masks and require external MSRs. + * Those extra MSRs end up being shared for all events on + * a PMU and sometimes between PMU of sibling HT threads. + * In either case, the kernel needs to handle conflicting + * accesses to those extra, shared, regs. The data structure + * to manage those registers is stored in cpu_hw_event. + */ +struct extra_reg { + unsigned int event; + unsigned int msr; + u64 config_mask; + u64 valid_mask; + int idx; /* per_xxx->regs[] reg index */ + bool extra_msr_access; +}; + +#define EVENT_EXTRA_REG(e, ms, m, vm, i) { \ + .event = (e), \ + .msr = (ms), \ + .config_mask = (m), \ + .valid_mask = (vm), \ + .idx = EXTRA_REG_##i, \ + .extra_msr_access = true, \ + } + +#define INTEL_EVENT_EXTRA_REG(event, msr, vm, idx) \ + EVENT_EXTRA_REG(event, msr, ARCH_PERFMON_EVENTSEL_EVENT, vm, idx) + +#define INTEL_UEVENT_EXTRA_REG(event, msr, vm, idx) \ + EVENT_EXTRA_REG(event, msr, ARCH_PERFMON_EVENTSEL_EVENT | \ + ARCH_PERFMON_EVENTSEL_UMASK, vm, idx) + +#define INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(c) \ + INTEL_UEVENT_EXTRA_REG(c, \ + MSR_PEBS_LD_LAT_THRESHOLD, \ + 0xffff, \ + LDLAT) + +#define EVENT_EXTRA_END EVENT_EXTRA_REG(0, 0, 0, 0, RSP_0) + +union perf_capabilities { + struct { + u64 lbr_format:6; + u64 pebs_trap:1; + u64 pebs_arch_reg:1; + u64 pebs_format:4; + u64 smm_freeze:1; + /* + * PMU supports separate counter range for writing + * values > 32bit. + */ + u64 full_width_write:1; + u64 pebs_baseline:1; + u64 perf_metrics:1; + u64 pebs_output_pt_available:1; + u64 anythread_deprecated:1; + }; + u64 capabilities; +}; + +struct x86_pmu_quirk { + struct x86_pmu_quirk *next; + void (*func)(void); +}; + +union x86_pmu_config { + struct { + u64 event:8, + umask:8, + usr:1, + os:1, + edge:1, + pc:1, + interrupt:1, + __reserved1:1, + en:1, + inv:1, + cmask:8, + event2:4, + __reserved2:4, + go:1, + ho:1; + } bits; + u64 value; +}; + +#define X86_CONFIG(args...) ((union x86_pmu_config){.bits = {args}}).value + +enum { + x86_lbr_exclusive_lbr, + x86_lbr_exclusive_bts, + x86_lbr_exclusive_pt, + x86_lbr_exclusive_max, +}; + +/* + * struct x86_pmu - generic x86 pmu + */ +struct x86_pmu { + /* + * Generic x86 PMC bits + */ + const char *name; + int version; + int (*handle_irq)(struct pt_regs *); + void (*disable_all)(void); + void (*enable_all)(int added); + void (*enable)(struct perf_event *); + void (*disable)(struct perf_event *); + void (*add)(struct perf_event *); + void (*del)(struct perf_event *); + void (*read)(struct perf_event *event); + int (*hw_config)(struct perf_event *event); + int (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign); + unsigned eventsel; + unsigned perfctr; + int (*addr_offset)(int index, bool eventsel); + int (*rdpmc_index)(int index); + u64 (*event_map)(int); + int max_events; + int num_counters; + int num_counters_fixed; + int cntval_bits; + u64 cntval_mask; + union { + unsigned long events_maskl; + unsigned long events_mask[BITS_TO_LONGS(ARCH_PERFMON_EVENTS_COUNT)]; + }; + int events_mask_len; + int apic; + u64 max_period; + struct event_constraint * + (*get_event_constraints)(struct cpu_hw_events *cpuc, + int idx, + struct perf_event *event); + + void (*put_event_constraints)(struct cpu_hw_events *cpuc, + struct perf_event *event); + + void (*start_scheduling)(struct cpu_hw_events *cpuc); + + void (*commit_scheduling)(struct cpu_hw_events *cpuc, int idx, int cntr); + + void (*stop_scheduling)(struct cpu_hw_events *cpuc); + + struct event_constraint *event_constraints; + struct x86_pmu_quirk *quirks; + int perfctr_second_write; + u64 (*limit_period)(struct perf_event *event, u64 l); + + /* PMI handler bits */ + unsigned int late_ack :1, + enabled_ack :1, + counter_freezing :1; + /* + * sysfs attrs + */ + int attr_rdpmc_broken; + int attr_rdpmc; + struct attribute **format_attrs; + + ssize_t (*events_sysfs_show)(char *page, u64 config); + const struct attribute_group **attr_update; + + unsigned long attr_freeze_on_smi; + + /* + * CPU Hotplug hooks + */ + int (*cpu_prepare)(int cpu); + void (*cpu_starting)(int cpu); + void (*cpu_dying)(int cpu); + void (*cpu_dead)(int cpu); + + void (*check_microcode)(void); + void (*sched_task)(struct perf_event_context *ctx, + bool sched_in); + + /* + * Intel Arch Perfmon v2+ + */ + u64 intel_ctrl; + union perf_capabilities intel_cap; + + /* + * Intel DebugStore bits + */ + unsigned int bts :1, + bts_active :1, + pebs :1, + pebs_active :1, + pebs_broken :1, + pebs_prec_dist :1, + pebs_no_tlb :1, + pebs_no_isolation :1; + int pebs_record_size; + int pebs_buffer_size; + int max_pebs_events; + void (*drain_pebs)(struct pt_regs *regs, struct perf_sample_data *data); + struct event_constraint *pebs_constraints; + void (*pebs_aliases)(struct perf_event *event); + unsigned long large_pebs_flags; + u64 rtm_abort_event; + + /* + * Intel LBR + */ + unsigned int lbr_tos, lbr_from, lbr_to, + lbr_info, lbr_nr; /* LBR base regs and size */ + union { + u64 lbr_sel_mask; /* LBR_SELECT valid bits */ + u64 lbr_ctl_mask; /* LBR_CTL valid bits */ + }; + union { + const int *lbr_sel_map; /* lbr_select mappings */ + int *lbr_ctl_map; /* LBR_CTL mappings */ + }; + bool lbr_double_abort; /* duplicated lbr aborts */ + bool lbr_pt_coexist; /* (LBR|BTS) may coexist with PT */ + + /* + * Intel Architectural LBR CPUID Enumeration + */ + unsigned int lbr_depth_mask:8; + unsigned int lbr_deep_c_reset:1; + unsigned int lbr_lip:1; + unsigned int lbr_cpl:1; + unsigned int lbr_filter:1; + unsigned int lbr_call_stack:1; + unsigned int lbr_mispred:1; + unsigned int lbr_timed_lbr:1; + unsigned int lbr_br_type:1; + + void (*lbr_reset)(void); + void (*lbr_read)(struct cpu_hw_events *cpuc); + void (*lbr_save)(void *ctx); + void (*lbr_restore)(void *ctx); + + /* + * Intel PT/LBR/BTS are exclusive + */ + atomic_t lbr_exclusive[x86_lbr_exclusive_max]; + + /* + * Intel perf metrics + */ + u64 (*update_topdown_event)(struct perf_event *event); + int (*set_topdown_event_period)(struct perf_event *event); + + /* + * perf task context (i.e. struct perf_event_context::task_ctx_data) + * switch helper to bridge calls from perf/core to perf/x86. + * See struct pmu::swap_task_ctx() usage for examples; + */ + void (*swap_task_ctx)(struct perf_event_context *prev, + struct perf_event_context *next); + + /* + * AMD bits + */ + unsigned int amd_nb_constraints : 1; + u64 perf_ctr_pair_en; + + /* + * Extra registers for events + */ + struct extra_reg *extra_regs; + unsigned int flags; + + /* + * Intel host/guest support (KVM) + */ + struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr); + + /* + * Check period value for PERF_EVENT_IOC_PERIOD ioctl. + */ + int (*check_period) (struct perf_event *event, u64 period); + + int (*aux_output_match) (struct perf_event *event); +}; + +struct x86_perf_task_context_opt { + int lbr_callstack_users; + int lbr_stack_state; + int log_id; +}; + +struct x86_perf_task_context { + u64 lbr_sel; + int tos; + int valid_lbrs; + struct x86_perf_task_context_opt opt; + struct lbr_entry lbr[MAX_LBR_ENTRIES]; +}; + +struct x86_perf_task_context_arch_lbr { + struct x86_perf_task_context_opt opt; + struct lbr_entry entries[]; +}; + +/* + * Add padding to guarantee the 64-byte alignment of the state buffer. + * + * The structure is dynamically allocated. The size of the LBR state may vary + * based on the number of LBR registers. + * + * Do not put anything after the LBR state. + */ +struct x86_perf_task_context_arch_lbr_xsave { + struct x86_perf_task_context_opt opt; + + union { + struct xregs_state xsave; + struct { + struct fxregs_state i387; + struct xstate_header header; + struct arch_lbr_state lbr; + } __attribute__ ((packed, aligned (XSAVE_ALIGNMENT))); + }; +}; + +#define x86_add_quirk(func_) \ +do { \ + static struct x86_pmu_quirk __quirk __initdata = { \ + .func = func_, \ + }; \ + __quirk.next = x86_pmu.quirks; \ + x86_pmu.quirks = &__quirk; \ +} while (0) + +/* + * x86_pmu flags + */ +#define PMU_FL_NO_HT_SHARING 0x1 /* no hyper-threading resource sharing */ +#define PMU_FL_HAS_RSP_1 0x2 /* has 2 equivalent offcore_rsp regs */ +#define PMU_FL_EXCL_CNTRS 0x4 /* has exclusive counter requirements */ +#define PMU_FL_EXCL_ENABLED 0x8 /* exclusive counter active */ +#define PMU_FL_PEBS_ALL 0x10 /* all events are valid PEBS events */ +#define PMU_FL_TFA 0x20 /* deal with TSX force abort */ +#define PMU_FL_PAIR 0x40 /* merge counters for large incr. events */ + +#define EVENT_VAR(_id) event_attr_##_id +#define EVENT_PTR(_id) &event_attr_##_id.attr.attr + +#define EVENT_ATTR(_name, _id) \ +static struct perf_pmu_events_attr EVENT_VAR(_id) = { \ + .attr = __ATTR(_name, 0444, events_sysfs_show, NULL), \ + .id = PERF_COUNT_HW_##_id, \ + .event_str = NULL, \ +}; + +#define EVENT_ATTR_STR(_name, v, str) \ +static struct perf_pmu_events_attr event_attr_##v = { \ + .attr = __ATTR(_name, 0444, events_sysfs_show, NULL), \ + .id = 0, \ + .event_str = str, \ +}; + +#define EVENT_ATTR_STR_HT(_name, v, noht, ht) \ +static struct perf_pmu_events_ht_attr event_attr_##v = { \ + .attr = __ATTR(_name, 0444, events_ht_sysfs_show, NULL),\ + .id = 0, \ + .event_str_noht = noht, \ + .event_str_ht = ht, \ +} + +struct pmu *x86_get_pmu(unsigned int cpu); +extern struct x86_pmu x86_pmu __read_mostly; + +static __always_inline struct x86_perf_task_context_opt *task_context_opt(void *ctx) +{ + if (static_cpu_has(X86_FEATURE_ARCH_LBR)) + return &((struct x86_perf_task_context_arch_lbr *)ctx)->opt; + + return &((struct x86_perf_task_context *)ctx)->opt; +} + +static inline bool x86_pmu_has_lbr_callstack(void) +{ + return x86_pmu.lbr_sel_map && + x86_pmu.lbr_sel_map[PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT] > 0; +} + +DECLARE_PER_CPU(struct cpu_hw_events, cpu_hw_events); + +int x86_perf_event_set_period(struct perf_event *event); + +/* + * Generalized hw caching related hw_event table, filled + * in on a per model basis. A value of 0 means + * 'not supported', -1 means 'hw_event makes no sense on + * this CPU', any other value means the raw hw_event + * ID. + */ + +#define C(x) PERF_COUNT_HW_CACHE_##x + +extern u64 __read_mostly hw_cache_event_ids + [PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX]; +extern u64 __read_mostly hw_cache_extra_regs + [PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX]; + +u64 x86_perf_event_update(struct perf_event *event); + +static inline unsigned int x86_pmu_config_addr(int index) +{ + return x86_pmu.eventsel + (x86_pmu.addr_offset ? + x86_pmu.addr_offset(index, true) : index); +} + +static inline unsigned int x86_pmu_event_addr(int index) +{ + return x86_pmu.perfctr + (x86_pmu.addr_offset ? + x86_pmu.addr_offset(index, false) : index); +} + +static inline int x86_pmu_rdpmc_index(int index) +{ + return x86_pmu.rdpmc_index ? x86_pmu.rdpmc_index(index) : index; +} + +int x86_add_exclusive(unsigned int what); + +void x86_del_exclusive(unsigned int what); + +int x86_reserve_hardware(void); + +void x86_release_hardware(void); + +int x86_pmu_max_precise(void); + +void hw_perf_lbr_event_destroy(struct perf_event *event); + +int x86_setup_perfctr(struct perf_event *event); + +int x86_pmu_hw_config(struct perf_event *event); + +void x86_pmu_disable_all(void); + +static inline bool is_counter_pair(struct hw_perf_event *hwc) +{ + return hwc->flags & PERF_X86_EVENT_PAIR; +} + +static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc, + u64 enable_mask) +{ + u64 disable_mask = __this_cpu_read(cpu_hw_events.perf_ctr_virt_mask); + + if (hwc->extra_reg.reg) + wrmsrl(hwc->extra_reg.reg, hwc->extra_reg.config); + + /* + * Add enabled Merge event on next counter + * if large increment event being enabled on this counter + */ + if (is_counter_pair(hwc)) + wrmsrl(x86_pmu_config_addr(hwc->idx + 1), x86_pmu.perf_ctr_pair_en); + + wrmsrl(hwc->config_base, (hwc->config | enable_mask) & ~disable_mask); +} + +void x86_pmu_enable_all(int added); + +int perf_assign_events(struct event_constraint **constraints, int n, + int wmin, int wmax, int gpmax, int *assign); +int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign); + +void x86_pmu_stop(struct perf_event *event, int flags); + +static inline void x86_pmu_disable_event(struct perf_event *event) +{ + u64 disable_mask = __this_cpu_read(cpu_hw_events.perf_ctr_virt_mask); + struct hw_perf_event *hwc = &event->hw; + + wrmsrl(hwc->config_base, hwc->config & ~disable_mask); + + if (is_counter_pair(hwc)) + wrmsrl(x86_pmu_config_addr(hwc->idx + 1), 0); +} + +void x86_pmu_enable_event(struct perf_event *event); + +int x86_pmu_handle_irq(struct pt_regs *regs); + +extern struct event_constraint emptyconstraint; + +extern struct event_constraint unconstrained; + +static inline bool kernel_ip(unsigned long ip) +{ +#ifdef CONFIG_X86_32 + return ip > PAGE_OFFSET; +#else + return (long)ip < 0; +#endif +} + +/* + * Not all PMUs provide the right context information to place the reported IP + * into full context. Specifically segment registers are typically not + * supplied. + * + * Assuming the address is a linear address (it is for IBS), we fake the CS and + * vm86 mode using the known zero-based code segment and 'fix up' the registers + * to reflect this. + * + * Intel PEBS/LBR appear to typically provide the effective address, nothing + * much we can do about that but pray and treat it like a linear address. + */ +static inline void set_linear_ip(struct pt_regs *regs, unsigned long ip) +{ + regs->cs = kernel_ip(ip) ? __KERNEL_CS : __USER_CS; + if (regs->flags & X86_VM_MASK) + regs->flags ^= (PERF_EFLAGS_VM | X86_VM_MASK); + regs->ip = ip; +} + +ssize_t x86_event_sysfs_show(char *page, u64 config, u64 event); +ssize_t intel_event_sysfs_show(char *page, u64 config); + +ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr, + char *page); +ssize_t events_ht_sysfs_show(struct device *dev, struct device_attribute *attr, + char *page); + +#ifdef CONFIG_CPU_SUP_AMD + +int amd_pmu_init(void); + +#else /* CONFIG_CPU_SUP_AMD */ + +static inline int amd_pmu_init(void) +{ + return 0; +} + +#endif /* CONFIG_CPU_SUP_AMD */ + +static inline int is_pebs_pt(struct perf_event *event) +{ + return !!(event->hw.flags & PERF_X86_EVENT_PEBS_VIA_PT); +} + +#ifdef CONFIG_CPU_SUP_INTEL + +static inline bool intel_pmu_has_bts_period(struct perf_event *event, u64 period) +{ + struct hw_perf_event *hwc = &event->hw; + unsigned int hw_event, bts_event; + + if (event->attr.freq) + return false; + + hw_event = hwc->config & INTEL_ARCH_EVENT_MASK; + bts_event = x86_pmu.event_map(PERF_COUNT_HW_BRANCH_INSTRUCTIONS); + + return hw_event == bts_event && period == 1; +} + +static inline bool intel_pmu_has_bts(struct perf_event *event) +{ + struct hw_perf_event *hwc = &event->hw; + + return intel_pmu_has_bts_period(event, hwc->sample_period); +} + +int intel_pmu_save_and_restart(struct perf_event *event); + +struct event_constraint * +x86_get_event_constraints(struct cpu_hw_events *cpuc, int idx, + struct perf_event *event); + +extern int intel_cpuc_prepare(struct cpu_hw_events *cpuc, int cpu); +extern void intel_cpuc_finish(struct cpu_hw_events *cpuc); + +int intel_pmu_init(void); + +void init_debug_store_on_cpu(int cpu); + +void fini_debug_store_on_cpu(int cpu); + +void release_ds_buffers(void); + +void reserve_ds_buffers(void); + +void release_lbr_buffers(void); + +void reserve_lbr_buffers(void); + +extern struct event_constraint bts_constraint; +extern struct event_constraint vlbr_constraint; + +void intel_pmu_enable_bts(u64 config); + +void intel_pmu_disable_bts(void); + +int intel_pmu_drain_bts_buffer(void); + +extern struct event_constraint intel_core2_pebs_event_constraints[]; + +extern struct event_constraint intel_atom_pebs_event_constraints[]; + +extern struct event_constraint intel_slm_pebs_event_constraints[]; + +extern struct event_constraint intel_glm_pebs_event_constraints[]; + +extern struct event_constraint intel_glp_pebs_event_constraints[]; + +extern struct event_constraint intel_nehalem_pebs_event_constraints[]; + +extern struct event_constraint intel_westmere_pebs_event_constraints[]; + +extern struct event_constraint intel_snb_pebs_event_constraints[]; + +extern struct event_constraint intel_ivb_pebs_event_constraints[]; + +extern struct event_constraint intel_hsw_pebs_event_constraints[]; + +extern struct event_constraint intel_bdw_pebs_event_constraints[]; + +extern struct event_constraint intel_skl_pebs_event_constraints[]; + +extern struct event_constraint intel_icl_pebs_event_constraints[]; + +struct event_constraint *intel_pebs_constraints(struct perf_event *event); + +void intel_pmu_pebs_add(struct perf_event *event); + +void intel_pmu_pebs_del(struct perf_event *event); + +void intel_pmu_pebs_enable(struct perf_event *event); + +void intel_pmu_pebs_disable(struct perf_event *event); + +void intel_pmu_pebs_enable_all(void); + +void intel_pmu_pebs_disable_all(void); + +void intel_pmu_pebs_sched_task(struct perf_event_context *ctx, bool sched_in); + +void intel_pmu_auto_reload_read(struct perf_event *event); + +void intel_pmu_store_pebs_lbrs(struct lbr_entry *lbr); + +void intel_ds_init(void); + +void intel_pmu_lbr_swap_task_ctx(struct perf_event_context *prev, + struct perf_event_context *next); + +void intel_pmu_lbr_sched_task(struct perf_event_context *ctx, bool sched_in); + +u64 lbr_from_signext_quirk_wr(u64 val); + +void intel_pmu_lbr_reset(void); + +void intel_pmu_lbr_reset_32(void); + +void intel_pmu_lbr_reset_64(void); + +void intel_pmu_lbr_add(struct perf_event *event); + +void intel_pmu_lbr_del(struct perf_event *event); + +void intel_pmu_lbr_enable_all(bool pmi); + +void intel_pmu_lbr_disable_all(void); + +void intel_pmu_lbr_read(void); + +void intel_pmu_lbr_read_32(struct cpu_hw_events *cpuc); + +void intel_pmu_lbr_read_64(struct cpu_hw_events *cpuc); + +void intel_pmu_lbr_save(void *ctx); + +void intel_pmu_lbr_restore(void *ctx); + +void intel_pmu_lbr_init_core(void); + +void intel_pmu_lbr_init_nhm(void); + +void intel_pmu_lbr_init_atom(void); + +void intel_pmu_lbr_init_slm(void); + +void intel_pmu_lbr_init_snb(void); + +void intel_pmu_lbr_init_hsw(void); + +void intel_pmu_lbr_init_skl(void); + +void intel_pmu_lbr_init_knl(void); + +void intel_pmu_arch_lbr_init(void); + +void intel_pmu_pebs_data_source_nhm(void); + +void intel_pmu_pebs_data_source_skl(bool pmem); + +int intel_pmu_setup_lbr_filter(struct perf_event *event); + +void intel_pt_interrupt(void); + +int intel_bts_interrupt(void); + +void intel_bts_enable_local(void); + +void intel_bts_disable_local(void); + +int p4_pmu_init(void); + +int p6_pmu_init(void); + +int knc_pmu_init(void); + +static inline int is_ht_workaround_enabled(void) +{ + return !!(x86_pmu.flags & PMU_FL_EXCL_ENABLED); +} + +#else /* CONFIG_CPU_SUP_INTEL */ + +static inline void reserve_ds_buffers(void) +{ +} + +static inline void release_ds_buffers(void) +{ +} + +static inline void release_lbr_buffers(void) +{ +} + +static inline void reserve_lbr_buffers(void) +{ +} + +static inline int intel_pmu_init(void) +{ + return 0; +} + +static inline int intel_cpuc_prepare(struct cpu_hw_events *cpuc, int cpu) +{ + return 0; +} + +static inline void intel_cpuc_finish(struct cpu_hw_events *cpuc) +{ +} + +static inline int is_ht_workaround_enabled(void) +{ + return 0; +} +#endif /* CONFIG_CPU_SUP_INTEL */ + +#if ((defined CONFIG_CPU_SUP_CENTAUR) || (defined CONFIG_CPU_SUP_ZHAOXIN)) +int zhaoxin_pmu_init(void); +#else +static inline int zhaoxin_pmu_init(void) +{ + return 0; +} +#endif /*CONFIG_CPU_SUP_CENTAUR or CONFIG_CPU_SUP_ZHAOXIN*/ |