/*
 * Per core/cpu state
 *
 * Used to coordinate shared registers between HT threads or
 * among events on a single PMU.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/export.h>

#include <asm/cpufeature.h>
#include <asm/hardirq.h>
#include <asm/apic.h>

#include "perf_event.h"

/*
 * Intel PerfMon, used on Core and later.
 */
static u64 intel_perfmon_event_map[PERF_COUNT_HW_MAX] __read_mostly =
{
        [PERF_COUNT_HW_CPU_CYCLES]              = 0x003c,
        [PERF_COUNT_HW_INSTRUCTIONS]            = 0x00c0,
        [PERF_COUNT_HW_CACHE_REFERENCES]        = 0x4f2e,
        [PERF_COUNT_HW_CACHE_MISSES]            = 0x412e,
        [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = 0x00c4,
        [PERF_COUNT_HW_BRANCH_MISSES]           = 0x00c5,
        [PERF_COUNT_HW_BUS_CYCLES]              = 0x013c,
        [PERF_COUNT_HW_REF_CPU_CYCLES]          = 0x0300, /* pseudo-encoding */
};

static struct event_constraint intel_core_event_constraints[] __read_mostly =
{
        INTEL_EVENT_CONSTRAINT(0x11, 0x2), /* FP_ASSIST */
        INTEL_EVENT_CONSTRAINT(0x12, 0x2), /* MUL */
        INTEL_EVENT_CONSTRAINT(0x13, 0x2), /* DIV */
        INTEL_EVENT_CONSTRAINT(0x14, 0x1), /* CYCLES_DIV_BUSY */
        INTEL_EVENT_CONSTRAINT(0x19, 0x2), /* DELAYED_BYPASS */
        INTEL_EVENT_CONSTRAINT(0xc1, 0x1), /* FP_COMP_INSTR_RET */
        EVENT_CONSTRAINT_END
};

static struct event_constraint intel_core2_event_constraints[] __read_mostly =
{
        FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
        FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
        FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
        INTEL_EVENT_CONSTRAINT(0x10, 0x1), /* FP_COMP_OPS_EXE */
        INTEL_EVENT_CONSTRAINT(0x11, 0x2), /* FP_ASSIST */
        INTEL_EVENT_CONSTRAINT(0x12, 0x2), /* MUL */
        INTEL_EVENT_CONSTRAINT(0x13, 0x2), /* DIV */
        INTEL_EVENT_CONSTRAINT(0x14, 0x1), /* CYCLES_DIV_BUSY */
        INTEL_EVENT_CONSTRAINT(0x18, 0x1), /* IDLE_DURING_DIV */
        INTEL_EVENT_CONSTRAINT(0x19, 0x2), /* DELAYED_BYPASS */
        INTEL_EVENT_CONSTRAINT(0xa1, 0x1), /* RS_UOPS_DISPATCH_CYCLES */
        INTEL_EVENT_CONSTRAINT(0xc9, 0x1), /* ITLB_MISS_RETIRED (T30-9) */
        INTEL_EVENT_CONSTRAINT(0xcb, 0x1), /* MEM_LOAD_RETIRED */
        EVENT_CONSTRAINT_END
};

static struct event_constraint intel_nehalem_event_constraints[] __read_mostly =
{
        FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
        FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
        FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
        INTEL_EVENT_CONSTRAINT(0x40, 0x3), /* L1D_CACHE_LD */
        INTEL_EVENT_CONSTRAINT(0x41, 0x3), /* L1D_CACHE_ST */
        INTEL_EVENT_CONSTRAINT(0x42, 0x3), /* L1D_CACHE_LOCK */
        INTEL_EVENT_CONSTRAINT(0x43, 0x3), /* L1D_ALL_REF */
        INTEL_EVENT_CONSTRAINT(0x48, 0x3), /* L1D_PEND_MISS */
        INTEL_EVENT_CONSTRAINT(0x4e, 0x3), /* L1D_PREFETCH */
        INTEL_EVENT_CONSTRAINT(0x51, 0x3), /* L1D */
        INTEL_EVENT_CONSTRAINT(0x63, 0x3), /* CACHE_LOCK_CYCLES */
        EVENT_CONSTRAINT_END
};

static struct extra_reg intel_nehalem_extra_regs[] __read_mostly =
{
        INTEL_EVENT_EXTRA_REG(0xb7, MSR_OFFCORE_RSP_0, 0xffff, RSP_0),
        INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(0x100b),
        EVENT_EXTRA_END
};

static struct event_constraint intel_westmere_event_constraints[] __read_mostly =
{
        FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
        FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
        FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
        INTEL_EVENT_CONSTRAINT(0x51, 0x3), /* L1D */
        INTEL_EVENT_CONSTRAINT(0x60, 0x1), /* OFFCORE_REQUESTS_OUTSTANDING */
        INTEL_EVENT_CONSTRAINT(0x63, 0x3), /* CACHE_LOCK_CYCLES */
        INTEL_EVENT_CONSTRAINT(0xb3, 0x1), /* SNOOPQ_REQUEST_OUTSTANDING */
        EVENT_CONSTRAINT_END
};

static struct event_constraint intel_snb_event_constraints[] __read_mostly =
{
        FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
        FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
        FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
        INTEL_UEVENT_CONSTRAINT(0x04a3, 0xf), /* CYCLE_ACTIVITY.CYCLES_NO_DISPATCH */
        INTEL_UEVENT_CONSTRAINT(0x05a3, 0xf), /* CYCLE_ACTIVITY.STALLS_L2_PENDING */
        INTEL_UEVENT_CONSTRAINT(0x02a3, 0x4), /* CYCLE_ACTIVITY.CYCLES_L1D_PENDING */
        INTEL_UEVENT_CONSTRAINT(0x06a3, 0x4), /* CYCLE_ACTIVITY.STALLS_L1D_PENDING */
        INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
        INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
        INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
        INTEL_UEVENT_CONSTRAINT(0x04a3, 0xf), /* CYCLE_ACTIVITY.CYCLES_NO_DISPATCH */
        INTEL_UEVENT_CONSTRAINT(0x02a3, 0x4), /* CYCLE_ACTIVITY.CYCLES_L1D_PENDING */
        EVENT_CONSTRAINT_END
};

static struct event_constraint intel_ivb_event_constraints[] __read_mostly =
{
        FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
        FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
        FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
        INTEL_UEVENT_CONSTRAINT(0x0148, 0x4), /* L1D_PEND_MISS.PENDING */
        INTEL_UEVENT_CONSTRAINT(0x0279, 0xf), /* IDQ.EMTPY */
        INTEL_UEVENT_CONSTRAINT(0x019c, 0xf), /* IDQ_UOPS_NOT_DELIVERED.CORE */
        INTEL_UEVENT_CONSTRAINT(0x04a3, 0xf), /* CYCLE_ACTIVITY.CYCLES_NO_EXECUTE */
        INTEL_UEVENT_CONSTRAINT(0x05a3, 0xf), /* CYCLE_ACTIVITY.STALLS_L2_PENDING */
        INTEL_UEVENT_CONSTRAINT(0x06a3, 0xf), /* CYCLE_ACTIVITY.STALLS_LDM_PENDING */
        INTEL_UEVENT_CONSTRAINT(0x08a3, 0x4), /* CYCLE_ACTIVITY.CYCLES_L1D_PENDING */
        INTEL_UEVENT_CONSTRAINT(0x0ca3, 0x4), /* CYCLE_ACTIVITY.STALLS_L1D_PENDING */
        INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
        /*
         * Errata BV98 -- MEM_*_RETIRED events can leak between counters of SMT
         * siblings; disable these events because they can corrupt unrelated
         * counters.
         */
        INTEL_EVENT_CONSTRAINT(0xd0, 0x0), /* MEM_UOPS_RETIRED.* */
        INTEL_EVENT_CONSTRAINT(0xd1, 0x0), /* MEM_LOAD_UOPS_RETIRED.* */
        INTEL_EVENT_CONSTRAINT(0xd2, 0x0), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */
        INTEL_EVENT_CONSTRAINT(0xd3, 0x0), /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */
        EVENT_CONSTRAINT_END
};

static struct extra_reg intel_westmere_extra_regs[] __read_mostly =
{
        INTEL_EVENT_EXTRA_REG(0xb7, MSR_OFFCORE_RSP_0, 0xffff, RSP_0),
        INTEL_EVENT_EXTRA_REG(0xbb, MSR_OFFCORE_RSP_1, 0xffff, RSP_1),
        INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(0x100b),
        EVENT_EXTRA_END
};

static struct event_constraint intel_v1_event_constraints[] __read_mostly =
{
        EVENT_CONSTRAINT_END
};

static struct event_constraint intel_gen_event_constraints[] __read_mostly =
{
        FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
        FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
        FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
        EVENT_CONSTRAINT_END
};

static struct extra_reg intel_snb_extra_regs[] __read_mostly = {
        INTEL_EVENT_EXTRA_REG(0xb7, MSR_OFFCORE_RSP_0, 0x3f807f8fffull, RSP_0),
        INTEL_EVENT_EXTRA_REG(0xbb, MSR_OFFCORE_RSP_1, 0x3f807f8fffull, RSP_1),
        INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(0x01cd),
        EVENT_EXTRA_END
};

static struct extra_reg intel_snbep_extra_regs[] __read_mostly = {
        INTEL_EVENT_EXTRA_REG(0xb7, MSR_OFFCORE_RSP_0, 0x3fffff8fffull, RSP_0),
        INTEL_EVENT_EXTRA_REG(0xbb, MSR_OFFCORE_RSP_1, 0x3fffff8fffull, RSP_1),
        INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(0x01cd),
        EVENT_EXTRA_END
};

EVENT_ATTR_STR(mem-loads, mem_ld_nhm, "event=0x0b,umask=0x10,ldlat=3");
EVENT_ATTR_STR(mem-loads, mem_ld_snb, "event=0xcd,umask=0x1,ldlat=3");
EVENT_ATTR_STR(mem-stores, mem_st_snb, "event=0xcd,umask=0x2");

struct attribute *nhm_events_attrs[] = {
        EVENT_PTR(mem_ld_nhm),
        NULL,
};

struct attribute *snb_events_attrs[] = {
        EVENT_PTR(mem_ld_snb),
        EVENT_PTR(mem_st_snb),
        NULL,
};

static struct event_constraint intel_hsw_event_constraints[] = {
        FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
        FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
        FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
        INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.* */
        INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
        INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
        /* CYCLE_ACTIVITY.CYCLES_L1D_PENDING */
        INTEL_EVENT_CONSTRAINT(0x08a3, 0x4),
        /* CYCLE_ACTIVITY.STALLS_L1D_PENDING */
        INTEL_EVENT_CONSTRAINT(0x0ca3, 0x4),
        /* CYCLE_ACTIVITY.CYCLES_NO_EXECUTE */
        INTEL_EVENT_CONSTRAINT(0x04a3, 0xf),
        EVENT_CONSTRAINT_END
};

static u64 intel_pmu_event_map(int hw_event)
{
        return intel_perfmon_event_map[hw_event];
}

#define SNB_DMND_DATA_RD        (1ULL << 0)
#define SNB_DMND_RFO            (1ULL << 1)
#define SNB_DMND_IFETCH         (1ULL << 2)
#define SNB_DMND_WB             (1ULL << 3)
#define SNB_PF_DATA_RD          (1ULL << 4)
#define SNB_PF_RFO              (1ULL << 5)
#define SNB_PF_IFETCH           (1ULL << 6)
#define SNB_LLC_DATA_RD         (1ULL << 7)
#define SNB_LLC_RFO             (1ULL << 8)
#define SNB_LLC_IFETCH          (1ULL << 9)
#define SNB_BUS_LOCKS           (1ULL << 10)
#define SNB_STRM_ST             (1ULL << 11)
#define SNB_OTHER               (1ULL << 15)
#define SNB_RESP_ANY            (1ULL << 16)
#define SNB_NO_SUPP             (1ULL << 17)
#define SNB_LLC_HITM            (1ULL << 18)
#define SNB_LLC_HITE            (1ULL << 19)
#define SNB_LLC_HITS            (1ULL << 20)
#define SNB_LLC_HITF            (1ULL << 21)
#define SNB_LOCAL               (1ULL << 22)
#define SNB_REMOTE              (0xffULL << 23)
#define SNB_SNP_NONE            (1ULL << 31)
#define SNB_SNP_NOT_NEEDED      (1ULL << 32)
#define SNB_SNP_MISS            (1ULL << 33)
#define SNB_NO_FWD              (1ULL << 34)
#define SNB_SNP_FWD             (1ULL << 35)
#define SNB_HITM                (1ULL << 36)
#define SNB_NON_DRAM            (1ULL << 37)

#define SNB_DMND_READ           (SNB_DMND_DATA_RD|SNB_LLC_DATA_RD)
#define SNB_DMND_WRITE          (SNB_DMND_RFO|SNB_LLC_RFO)
#define SNB_DMND_PREFETCH       (SNB_PF_DATA_RD|SNB_PF_RFO)

#define SNB_SNP_ANY             (SNB_SNP_NONE|SNB_SNP_NOT_NEEDED| \
                                 SNB_SNP_MISS|SNB_NO_FWD|SNB_SNP_FWD| \
                                 SNB_HITM)

#define SNB_DRAM_ANY            (SNB_LOCAL|SNB_REMOTE|SNB_SNP_ANY)
#define SNB_DRAM_REMOTE         (SNB_REMOTE|SNB_SNP_ANY)

#define SNB_L3_ACCESS           SNB_RESP_ANY
#define SNB_L3_MISS             (SNB_DRAM_ANY|SNB_NON_DRAM)

static __initconst const u64 snb_hw_cache_extra_regs
                                [PERF_COUNT_HW_CACHE_MAX]
                                [PERF_COUNT_HW_CACHE_OP_MAX]
                                [PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
 [ C(LL  ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = SNB_DMND_READ|SNB_L3_ACCESS,
                [ C(RESULT_MISS)   ] = SNB_DMND_READ|SNB_L3_MISS,
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = SNB_DMND_WRITE|SNB_L3_ACCESS,
                [ C(RESULT_MISS)   ] = SNB_DMND_WRITE|SNB_L3_MISS,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = SNB_DMND_PREFETCH|SNB_L3_ACCESS,
                [ C(RESULT_MISS)   ] = SNB_DMND_PREFETCH|SNB_L3_MISS,
        },
 },
 [ C(NODE) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = SNB_DMND_READ|SNB_DRAM_ANY,
                [ C(RESULT_MISS)   ] = SNB_DMND_READ|SNB_DRAM_REMOTE,
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = SNB_DMND_WRITE|SNB_DRAM_ANY,
                [ C(RESULT_MISS)   ] = SNB_DMND_WRITE|SNB_DRAM_REMOTE,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = SNB_DMND_PREFETCH|SNB_DRAM_ANY,
                [ C(RESULT_MISS)   ] = SNB_DMND_PREFETCH|SNB_DRAM_REMOTE,
        },
 },
};

static __initconst const u64 snb_hw_cache_event_ids
                                [PERF_COUNT_HW_CACHE_MAX]
                                [PERF_COUNT_HW_CACHE_OP_MAX]
                                [PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
 [ C(L1D) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0xf1d0, /* MEM_UOP_RETIRED.LOADS        */
                [ C(RESULT_MISS)   ] = 0x0151, /* L1D.REPLACEMENT              */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0xf2d0, /* MEM_UOP_RETIRED.STORES       */
                [ C(RESULT_MISS)   ] = 0x0851, /* L1D.ALL_M_REPLACEMENT        */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0x024e, /* HW_PRE_REQ.DL1_MISS          */
        },
 },
 [ C(L1I ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0x0280, /* ICACHE.MISSES */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0x0,
        },
 },
 [ C(LL  ) ] = {
        [ C(OP_READ) ] = {
                /* OFFCORE_RESPONSE.ANY_DATA.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.ANY_DATA.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_WRITE) ] = {
                /* OFFCORE_RESPONSE.ANY_RFO.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.ANY_RFO.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_PREFETCH) ] = {
                /* OFFCORE_RESPONSE.PREFETCH.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.PREFETCH.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
 },
 [ C(DTLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x81d0, /* MEM_UOP_RETIRED.ALL_LOADS */
                [ C(RESULT_MISS)   ] = 0x0108, /* DTLB_LOAD_MISSES.CAUSES_A_WALK */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x82d0, /* MEM_UOP_RETIRED.ALL_STORES */
                [ C(RESULT_MISS)   ] = 0x0149, /* DTLB_STORE_MISSES.MISS_CAUSES_A_WALK */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0x0,
        },
 },
 [ C(ITLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x1085, /* ITLB_MISSES.STLB_HIT         */
                [ C(RESULT_MISS)   ] = 0x0185, /* ITLB_MISSES.CAUSES_A_WALK    */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
 [ C(BPU ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
                [ C(RESULT_MISS)   ] = 0x00c5, /* BR_MISP_RETIRED.ALL_BRANCHES */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
 [ C(NODE) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
 },

};

static __initconst const u64 westmere_hw_cache_event_ids
                                [PERF_COUNT_HW_CACHE_MAX]
                                [PERF_COUNT_HW_CACHE_OP_MAX]
                                [PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
 [ C(L1D) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x010b, /* MEM_INST_RETIRED.LOADS       */
                [ C(RESULT_MISS)   ] = 0x0151, /* L1D.REPL                     */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x020b, /* MEM_INST_RETURED.STORES      */
                [ C(RESULT_MISS)   ] = 0x0251, /* L1D.M_REPL                   */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x014e, /* L1D_PREFETCH.REQUESTS        */
                [ C(RESULT_MISS)   ] = 0x024e, /* L1D_PREFETCH.MISS            */
        },
 },
 [ C(L1I ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS                    */
                [ C(RESULT_MISS)   ] = 0x0280, /* L1I.MISSES                   */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0x0,
        },
 },
 [ C(LL  ) ] = {
        [ C(OP_READ) ] = {
                /* OFFCORE_RESPONSE.ANY_DATA.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.ANY_DATA.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        /*
         * Use RFO, not WRITEBACK, because a write miss would typically occur
         * on RFO.
         */
        [ C(OP_WRITE) ] = {
                /* OFFCORE_RESPONSE.ANY_RFO.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.ANY_RFO.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_PREFETCH) ] = {
                /* OFFCORE_RESPONSE.PREFETCH.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.PREFETCH.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
 },
 [ C(DTLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x010b, /* MEM_INST_RETIRED.LOADS       */
                [ C(RESULT_MISS)   ] = 0x0108, /* DTLB_LOAD_MISSES.ANY         */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x020b, /* MEM_INST_RETURED.STORES      */
                [ C(RESULT_MISS)   ] = 0x010c, /* MEM_STORE_RETIRED.DTLB_MISS  */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0x0,
        },
 },
 [ C(ITLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x01c0, /* INST_RETIRED.ANY_P           */
                [ C(RESULT_MISS)   ] = 0x0185, /* ITLB_MISSES.ANY              */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
 [ C(BPU ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
                [ C(RESULT_MISS)   ] = 0x03e8, /* BPU_CLEARS.ANY               */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
 [ C(NODE) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
 },
};

/*
 * Nehalem/Westmere MSR_OFFCORE_RESPONSE bits;
 * See IA32 SDM Vol 3B 30.6.1.3
 */

#define NHM_DMND_DATA_RD        (1 << 0)
#define NHM_DMND_RFO            (1 << 1)
#define NHM_DMND_IFETCH         (1 << 2)
#define NHM_DMND_WB             (1 << 3)
#define NHM_PF_DATA_RD          (1 << 4)
#define NHM_PF_DATA_RFO         (1 << 5)
#define NHM_PF_IFETCH           (1 << 6)
#define NHM_OFFCORE_OTHER       (1 << 7)
#define NHM_UNCORE_HIT          (1 << 8)
#define NHM_OTHER_CORE_HIT_SNP  (1 << 9)
#define NHM_OTHER_CORE_HITM     (1 << 10)
                                /* reserved */
#define NHM_REMOTE_CACHE_FWD    (1 << 12)
#define NHM_REMOTE_DRAM         (1 << 13)
#define NHM_LOCAL_DRAM          (1 << 14)
#define NHM_NON_DRAM            (1 << 15)

#define NHM_LOCAL               (NHM_LOCAL_DRAM|NHM_REMOTE_CACHE_FWD)
#define NHM_REMOTE              (NHM_REMOTE_DRAM)

#define NHM_DMND_READ           (NHM_DMND_DATA_RD)
#define NHM_DMND_WRITE          (NHM_DMND_RFO|NHM_DMND_WB)
#define NHM_DMND_PREFETCH       (NHM_PF_DATA_RD|NHM_PF_DATA_RFO)

#define NHM_L3_HIT      (NHM_UNCORE_HIT|NHM_OTHER_CORE_HIT_SNP|NHM_OTHER_CORE_HITM)
#define NHM_L3_MISS     (NHM_NON_DRAM|NHM_LOCAL_DRAM|NHM_REMOTE_DRAM|NHM_REMOTE_CACHE_FWD)
#define NHM_L3_ACCESS   (NHM_L3_HIT|NHM_L3_MISS)

static __initconst const u64 nehalem_hw_cache_extra_regs
                                [PERF_COUNT_HW_CACHE_MAX]
                                [PERF_COUNT_HW_CACHE_OP_MAX]
                                [PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
 [ C(LL  ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = NHM_DMND_READ|NHM_L3_ACCESS,
                [ C(RESULT_MISS)   ] = NHM_DMND_READ|NHM_L3_MISS,
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = NHM_DMND_WRITE|NHM_L3_ACCESS,
                [ C(RESULT_MISS)   ] = NHM_DMND_WRITE|NHM_L3_MISS,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = NHM_DMND_PREFETCH|NHM_L3_ACCESS,
                [ C(RESULT_MISS)   ] = NHM_DMND_PREFETCH|NHM_L3_MISS,
        },
 },
 [ C(NODE) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = NHM_DMND_READ|NHM_LOCAL|NHM_REMOTE,
                [ C(RESULT_MISS)   ] = NHM_DMND_READ|NHM_REMOTE,
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = NHM_DMND_WRITE|NHM_LOCAL|NHM_REMOTE,
                [ C(RESULT_MISS)   ] = NHM_DMND_WRITE|NHM_REMOTE,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = NHM_DMND_PREFETCH|NHM_LOCAL|NHM_REMOTE,
                [ C(RESULT_MISS)   ] = NHM_DMND_PREFETCH|NHM_REMOTE,
        },
 },
};

static __initconst const u64 nehalem_hw_cache_event_ids
                                [PERF_COUNT_HW_CACHE_MAX]
                                [PERF_COUNT_HW_CACHE_OP_MAX]
                                [PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
 [ C(L1D) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x010b, /* MEM_INST_RETIRED.LOADS       */
                [ C(RESULT_MISS)   ] = 0x0151, /* L1D.REPL                     */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x020b, /* MEM_INST_RETURED.STORES      */
                [ C(RESULT_MISS)   ] = 0x0251, /* L1D.M_REPL                   */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x014e, /* L1D_PREFETCH.REQUESTS        */
                [ C(RESULT_MISS)   ] = 0x024e, /* L1D_PREFETCH.MISS            */
        },
 },
 [ C(L1I ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS                    */
                [ C(RESULT_MISS)   ] = 0x0280, /* L1I.MISSES                   */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0x0,
        },
 },
 [ C(LL  ) ] = {
        [ C(OP_READ) ] = {
                /* OFFCORE_RESPONSE.ANY_DATA.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.ANY_DATA.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        /*
         * Use RFO, not WRITEBACK, because a write miss would typically occur
         * on RFO.
         */
        [ C(OP_WRITE) ] = {
                /* OFFCORE_RESPONSE.ANY_RFO.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.ANY_RFO.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_PREFETCH) ] = {
                /* OFFCORE_RESPONSE.PREFETCH.LOCAL_CACHE */
                [ C(RESULT_ACCESS) ] = 0x01b7,
                /* OFFCORE_RESPONSE.PREFETCH.ANY_LLC_MISS */
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
 },
 [ C(DTLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI   (alias)  */
                [ C(RESULT_MISS)   ] = 0x0108, /* DTLB_LOAD_MISSES.ANY         */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI   (alias)  */
                [ C(RESULT_MISS)   ] = 0x010c, /* MEM_STORE_RETIRED.DTLB_MISS  */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0x0,
        },
 },
 [ C(ITLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x01c0, /* INST_RETIRED.ANY_P           */
                [ C(RESULT_MISS)   ] = 0x20c8, /* ITLB_MISS_RETIRED            */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
 [ C(BPU ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
                [ C(RESULT_MISS)   ] = 0x03e8, /* BPU_CLEARS.ANY               */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
 [ C(NODE) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x01b7,
                [ C(RESULT_MISS)   ] = 0x01b7,
        },
 },
};

static __initconst const u64 core2_hw_cache_event_ids
                                [PERF_COUNT_HW_CACHE_MAX]
                                [PERF_COUNT_HW_CACHE_OP_MAX]
                                [PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
 [ C(L1D) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI          */
                [ C(RESULT_MISS)   ] = 0x0140, /* L1D_CACHE_LD.I_STATE       */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI          */
                [ C(RESULT_MISS)   ] = 0x0141, /* L1D_CACHE_ST.I_STATE       */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x104e, /* L1D_PREFETCH.REQUESTS      */
                [ C(RESULT_MISS)   ] = 0,
        },
 },
 [ C(L1I ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x0080, /* L1I.READS                  */
                [ C(RESULT_MISS)   ] = 0x0081, /* L1I.MISSES                 */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0,
                [ C(RESULT_MISS)   ] = 0,
        },
 },
 [ C(LL  ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x4f29, /* L2_LD.MESI                 */
                [ C(RESULT_MISS)   ] = 0x4129, /* L2_LD.ISTATE               */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x4f2A, /* L2_ST.MESI                 */
                [ C(RESULT_MISS)   ] = 0x412A, /* L2_ST.ISTATE               */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0,
                [ C(RESULT_MISS)   ] = 0,
        },
 },
 [ C(DTLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI  (alias) */
                [ C(RESULT_MISS)   ] = 0x0208, /* DTLB_MISSES.MISS_LD        */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI  (alias) */
                [ C(RESULT_MISS)   ] = 0x0808, /* DTLB_MISSES.MISS_ST        */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0,
                [ C(RESULT_MISS)   ] = 0,
        },
 },
 [ C(ITLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x00c0, /* INST_RETIRED.ANY_P         */
                [ C(RESULT_MISS)   ] = 0x1282, /* ITLBMISSES                 */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
 [ C(BPU ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ANY        */
                [ C(RESULT_MISS)   ] = 0x00c5, /* BP_INST_RETIRED.MISPRED    */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
};

static __initconst const u64 atom_hw_cache_event_ids
                                [PERF_COUNT_HW_CACHE_MAX]
                                [PERF_COUNT_HW_CACHE_OP_MAX]
                                [PERF_COUNT_HW_CACHE_RESULT_MAX] =
{
 [ C(L1D) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x2140, /* L1D_CACHE.LD               */
                [ C(RESULT_MISS)   ] = 0,
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x2240, /* L1D_CACHE.ST               */
                [ C(RESULT_MISS)   ] = 0,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0x0,
                [ C(RESULT_MISS)   ] = 0,
        },
 },
 [ C(L1I ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS                  */
                [ C(RESULT_MISS)   ] = 0x0280, /* L1I.MISSES                 */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0,
                [ C(RESULT_MISS)   ] = 0,
        },
 },
 [ C(LL  ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x4f29, /* L2_LD.MESI                 */
                [ C(RESULT_MISS)   ] = 0x4129, /* L2_LD.ISTATE               */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x4f2A, /* L2_ST.MESI                 */
                [ C(RESULT_MISS)   ] = 0x412A, /* L2_ST.ISTATE               */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0,
                [ C(RESULT_MISS)   ] = 0,
        },
 },
 [ C(DTLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x2140, /* L1D_CACHE_LD.MESI  (alias) */
                [ C(RESULT_MISS)   ] = 0x0508, /* DTLB_MISSES.MISS_LD        */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = 0x2240, /* L1D_CACHE_ST.MESI  (alias) */
                [ C(RESULT_MISS)   ] = 0x0608, /* DTLB_MISSES.MISS_ST        */
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = 0,
                [ C(RESULT_MISS)   ] = 0,
        },
 },
 [ C(ITLB) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x00c0, /* INST_RETIRED.ANY_P         */
                [ C(RESULT_MISS)   ] = 0x0282, /* ITLB.MISSES                */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
 [ C(BPU ) ] = {
        [ C(OP_READ) ] = {
                [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ANY        */
                [ C(RESULT_MISS)   ] = 0x00c5, /* BP_INST_RETIRED.MISPRED    */
        },
        [ C(OP_WRITE) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
        [ C(OP_PREFETCH) ] = {
                [ C(RESULT_ACCESS) ] = -1,
                [ C(RESULT_MISS)   ] = -1,
        },
 },
};

static inline bool intel_pmu_needs_lbr_smpl(struct perf_event *event)
{
        /* user explicitly requested branch sampling */
        if (has_branch_stack(event))
                return true;

        /* implicit branch sampling to correct PEBS skid */
        if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1 &&
            x86_pmu.intel_cap.pebs_format < 2)
                return true;

        return false;
}

static void intel_pmu_disable_all(void)
{
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);

        wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);

        if (test_bit(INTEL_PMC_IDX_FIXED_BTS, cpuc->active_mask))
                intel_pmu_disable_bts();

        intel_pmu_pebs_disable_all();
        intel_pmu_lbr_disable_all();
}

static void intel_pmu_enable_all(int added)
{
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);

        intel_pmu_pebs_enable_all();
        intel_pmu_lbr_enable_all();
        wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL,
                        x86_pmu.intel_ctrl & ~cpuc->intel_ctrl_guest_mask);

        if (test_bit(INTEL_PMC_IDX_FIXED_BTS, cpuc->active_mask)) {
                struct perf_event *event =
                        cpuc->events[INTEL_PMC_IDX_FIXED_BTS];

                if (WARN_ON_ONCE(!event))
                        return;

                intel_pmu_enable_bts(event->hw.config);
        }
}

/*
 * Workaround for:
 *   Intel Errata AAK100 (model 26)
 *   Intel Errata AAP53  (model 30)
 *   Intel Errata BD53   (model 44)
 *
 * The official story:
 *   These chips need to be 'reset' when adding counters by programming the
 *   magic three (non-counting) events 0x4300B5, 0x4300D2, and 0x4300B1 either
 *   in sequence on the same PMC or on different PMCs.
 *
 * In practise it appears some of these events do in fact count, and
 * we need to programm all 4 events.
 */
static void intel_pmu_nhm_workaround(void)
{
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
        static const unsigned long nhm_magic[4] = {
                0x4300B5,
                0x4300D2,
                0x4300B1,
                0x4300B1
        };
        struct perf_event *event;
        int i;

        /*
         * The Errata requires below steps:
         * 1) Clear MSR_IA32_PEBS_ENABLE and MSR_CORE_PERF_GLOBAL_CTRL;
         * 2) Configure 4 PERFEVTSELx with the magic events and clear
         *    the corresponding PMCx;
         * 3) set bit0~bit3 of MSR_CORE_PERF_GLOBAL_CTRL;
         * 4) Clear MSR_CORE_PERF_GLOBAL_CTRL;
         * 5) Clear 4 pairs of ERFEVTSELx and PMCx;
         */

        /*
         * The real steps we choose are a little different from above.
         * A) To reduce MSR operations, we don't run step 1) as they
         *    are already cleared before this function is called;
         * B) Call x86_perf_event_update to save PMCx before configuring
         *    PERFEVTSELx with magic number;
         * C) With step 5), we do clear only when the PERFEVTSELx is
         *    not used currently.
         * D) Call x86_perf_event_set_period to restore PMCx;
         */

        /* We always operate 4 pairs of PERF Counters */
        for (i = 0; i < 4; i++) {
                event = cpuc->events[i];
                if (event)
                        x86_perf_event_update(event);
        }

        for (i = 0; i < 4; i++) {
                wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + i, nhm_magic[i]);
                wrmsrl(MSR_ARCH_PERFMON_PERFCTR0 + i, 0x0);
        }

        wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0xf);
        wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0x0);

        for (i = 0; i < 4; i++) {
                event = cpuc->events[i];

                if (event) {
                        x86_perf_event_set_period(event);
                        __x86_pmu_enable_event(&event->hw,
                                        ARCH_PERFMON_EVENTSEL_ENABLE);

                } else
                        wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + i, 0x0);
        }
}

static void intel_pmu_nhm_enable_all(int added)
{
        if (added)
                intel_pmu_nhm_workaround();
        intel_pmu_enable_all(added);
}

static inline u64 intel_pmu_get_status(void)
{
        u64 status;

        rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status);

        return status;
}

static inline void intel_pmu_ack_status(u64 ack)
{
        wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, ack);
}

static void intel_pmu_disable_fixed(struct hw_perf_event *hwc)
{
        int idx = hwc->idx - INTEL_PMC_IDX_FIXED;
        u64 ctrl_val, mask;

        mask = 0xfULL << (idx * 4);

        rdmsrl(hwc->config_base, ctrl_val);
        ctrl_val &= ~mask;
        wrmsrl(hwc->config_base, ctrl_val);
}

static void intel_pmu_disable_event(struct perf_event *event)
{
        struct hw_perf_event *hwc = &event->hw;
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);

        if (unlikely(hwc->idx == INTEL_PMC_IDX_FIXED_BTS)) {
                intel_pmu_disable_bts();
                intel_pmu_drain_bts_buffer();
                return;
        }

        cpuc->intel_ctrl_guest_mask &= ~(1ull << hwc->idx);
        cpuc->intel_ctrl_host_mask &= ~(1ull << hwc->idx);

        /*
         * must disable before any actual event
         * because any event may be combined with LBR
         */
        if (intel_pmu_needs_lbr_smpl(event))
                intel_pmu_lbr_disable(event);

        if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
                intel_pmu_disable_fixed(hwc);
                return;
        }

        x86_pmu_disable_event(event);

        if (unlikely(event->attr.precise_ip))
                intel_pmu_pebs_disable(event);
}

static void intel_pmu_enable_fixed(struct hw_perf_event *hwc)
{
        int idx = hwc->idx - INTEL_PMC_IDX_FIXED;
        u64 ctrl_val, bits, mask;

        /*
         * Enable IRQ generation (0x8),
         * and enable ring-3 counting (0x2) and ring-0 counting (0x1)
         * if requested:
         */
        bits = 0x8ULL;
        if (hwc->config & ARCH_PERFMON_EVENTSEL_USR)
                bits |= 0x2;
        if (hwc->config & ARCH_PERFMON_EVENTSEL_OS)
                bits |= 0x1;

        /*
         * ANY bit is supported in v3 and up
         */
        if (x86_pmu.version > 2 && hwc->config & ARCH_PERFMON_EVENTSEL_ANY)
                bits |= 0x4;

        bits <<= (idx * 4);
        mask = 0xfULL << (idx * 4);

        rdmsrl(hwc->config_base, ctrl_val);
        ctrl_val &= ~mask;
        ctrl_val |= bits;
        wrmsrl(hwc->config_base, ctrl_val);
}

static void intel_pmu_enable_event(struct perf_event *event)
{
        struct hw_perf_event *hwc = &event->hw;
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);

        if (unlikely(hwc->idx == INTEL_PMC_IDX_FIXED_BTS)) {
                if (!__this_cpu_read(cpu_hw_events.enabled))
                        return;

                intel_pmu_enable_bts(hwc->config);
                return;
        }
        /*
         * must enabled before any actual event
         * because any event may be combined with LBR
         */
        if (intel_pmu_needs_lbr_smpl(event))
                intel_pmu_lbr_enable(event);

        if (event->attr.exclude_host)
                cpuc->intel_ctrl_guest_mask |= (1ull << hwc->idx);
        if (event->attr.exclude_guest)
                cpuc->intel_ctrl_host_mask |= (1ull << hwc->idx);

        if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
                intel_pmu_enable_fixed(hwc);
                return;
        }

        if (unlikely(event->attr.precise_ip))
                intel_pmu_pebs_enable(event);

        __x86_pmu_enable_event(hwc, ARCH_PERFMON_EVENTSEL_ENABLE);
}

/*
 * Save and restart an expired event. Called by NMI contexts,
 * so it has to be careful about preempting normal event ops:
 */
int intel_pmu_save_and_restart(struct perf_event *event)
{
        x86_perf_event_update(event);
        return x86_perf_event_set_period(event);
}

static void intel_pmu_reset(void)
{
        struct debug_store *ds = __this_cpu_read(cpu_hw_events.ds);
        unsigned long flags;
        int idx;

        if (!x86_pmu.num_counters)
                return;

        local_irq_save(flags);

        pr_info("clearing PMU state on CPU#%d\n", smp_processor_id());

        for (idx = 0; idx < x86_pmu.num_counters; idx++) {
                wrmsrl_safe(x86_pmu_config_addr(idx), 0ull);
                wrmsrl_safe(x86_pmu_event_addr(idx),  0ull);
        }
        for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++)
                wrmsrl_safe(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, 0ull);

        if (ds)
                ds->bts_index = ds->bts_buffer_base;

        local_irq_restore(flags);
}

/*
 * This handler is triggered by the local APIC, so the APIC IRQ handling
 * rules apply:
 */
static int intel_pmu_handle_irq(struct pt_regs *regs)
{
        struct perf_sample_data data;
        struct cpu_hw_events *cpuc;
        int bit, loops;
        u64 status;
        int handled;

        cpuc = &__get_cpu_var(cpu_hw_events);

        /*
         * No known reason to not always do late ACK,
         * but just in case do it opt-in.
         */
        if (!x86_pmu.late_ack)
                apic_write(APIC_LVTPC, APIC_DM_NMI);
        intel_pmu_disable_all();
        handled = intel_pmu_drain_bts_buffer();
        status = intel_pmu_get_status();
        if (!status) {
                intel_pmu_enable_all(0);
                return handled;
        }

        loops = 0;
again:
        intel_pmu_ack_status(status);
        if (++loops > 100) {
                static bool warned = false;
                if (!warned) {
                        WARN(1, "perfevents: irq loop stuck!\n");
                        perf_event_print_debug();
                        warned = true;
                }
                intel_pmu_reset();
                goto done;
        }

        inc_irq_stat(apic_perf_irqs);

        intel_pmu_lbr_read();

        /*
         * PEBS overflow sets bit 62 in the global status register
         */
        if (__test_and_clear_bit(62, (unsigned long *)&status)) {
                handled++;
                x86_pmu.drain_pebs(regs);
        }

        for_each_set_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) {
                struct perf_event *event = cpuc->events[bit];

                handled++;

                if (!test_bit(bit, cpuc->active_mask))
                        continue;

                if (!intel_pmu_save_and_restart(event))
                        continue;

                perf_sample_data_init(&data, 0, event->hw.last_period);

                if (has_branch_stack(event))
                        data.br_stack = &cpuc->lbr_stack;

                if (perf_event_overflow(event, &data, regs))
                        x86_pmu_stop(event, 0);
        }

        /*
         * Repeat if there is more work to be done:
         */
        status = intel_pmu_get_status();
        if (status)
                goto again;

done:
        intel_pmu_enable_all(0);
        /*
         * Only unmask the NMI after the overflow counters
         * have been reset. This avoids spurious NMIs on
         * Haswell CPUs.
         */
        if (x86_pmu.late_ack)
                apic_write(APIC_LVTPC, APIC_DM_NMI);
        return handled;
}

static struct event_constraint *
intel_bts_constraints(struct perf_event *event)
{
        struct hw_perf_event *hwc = &event->hw;
        unsigned int hw_event, bts_event;

        if (event->attr.freq)
                return NULL;

        hw_event = hwc->config & INTEL_ARCH_EVENT_MASK;
        bts_event = x86_pmu.event_map(PERF_COUNT_HW_BRANCH_INSTRUCTIONS);

        if (unlikely(hw_event == bts_event && hwc->sample_period == 1))
                return &bts_constraint;

        return NULL;
}

static int intel_alt_er(int idx)
{
        if (!(x86_pmu.er_flags & ERF_HAS_RSP_1))
                return idx;

        if (idx == EXTRA_REG_RSP_0)
                return EXTRA_REG_RSP_1;

        if (idx == EXTRA_REG_RSP_1)
                return EXTRA_REG_RSP_0;

        return idx;
}

static void intel_fixup_er(struct perf_event *event, int idx)
{
        event->hw.extra_reg.idx = idx;

        if (idx == EXTRA_REG_RSP_0) {
                event->hw.config &= ~INTEL_ARCH_EVENT_MASK;
                event->hw.config |= 0x01b7;
                event->hw.extra_reg.reg = MSR_OFFCORE_RSP_0;
        } else if (idx == EXTRA_REG_RSP_1) {
                event->hw.config &= ~INTEL_ARCH_EVENT_MASK;
                event->hw.config |= 0x01bb;
                event->hw.extra_reg.reg = MSR_OFFCORE_RSP_1;
        }
}

/*
 * manage allocation of shared extra msr for certain events
 *
 * sharing can be:
 * per-cpu: to be shared between the various events on a single PMU
 * per-core: per-cpu + shared by HT threads
 */
static struct event_constraint *
__intel_shared_reg_get_constraints(struct cpu_hw_events *cpuc,
                                   struct perf_event *event,
                                   struct hw_perf_event_extra *reg)
{
        struct event_constraint *c = &emptyconstraint;
        struct er_account *era;
        unsigned long flags;
        int idx = reg->idx;

        /*
         * reg->alloc can be set due to existing state, so for fake cpuc we
         * need to ignore this, otherwise we might fail to allocate proper fake
         * state for this extra reg constraint. Also see the comment below.
         */
        if (reg->alloc && !cpuc->is_fake)
                return NULL; /* call x86_get_event_constraint() */

again:
        era = &cpuc->shared_regs->regs[idx];
        /*
         * we use spin_lock_irqsave() to avoid lockdep issues when
         * passing a fake cpuc
         */
        raw_spin_lock_irqsave(&era->lock, flags);

        if (!atomic_read(&era->ref) || era->config == reg->config) {

                /*
                 * If its a fake cpuc -- as per validate_{group,event}() we
                 * shouldn't touch event state and we can avoid doing so
                 * since both will only call get_event_constraints() once
                 * on each event, this avoids the need for reg->alloc.
                 *
                 * Not doing the ER fixup will only result in era->reg being
                 * wrong, but since we won't actually try and program hardware
                 * this isn't a problem either.
                 */
                if (!cpuc->is_fake) {
                        if (idx != reg->idx)
                                intel_fixup_er(event, idx);

                        /*
                         * x86_schedule_events() can call get_event_constraints()
                         * multiple times on events in the case of incremental
                         * scheduling(). reg->alloc ensures we only do the ER
                         * allocation once.
                         */
                        reg->alloc = 1;
                }

                /* lock in msr value */
                era->config = reg->config;
                era->reg = reg->reg;

                /* one more user */
                atomic_inc(&era->ref);

                /*
                 * need to call x86_get_event_constraint()
                 * to check if associated event has constraints
                 */
                c = NULL;
        } else {
                idx = intel_alt_er(idx);
                if (idx != reg->idx) {
                        raw_spin_unlock_irqrestore(&era->lock, flags);
                        goto again;
                }
        }
        raw_spin_unlock_irqrestore(&era->lock, flags);

        return c;
}

static void
__intel_shared_reg_put_constraints(struct cpu_hw_events *cpuc,
                                   struct hw_perf_event_extra *reg)
{
        struct er_account *era;

        /*
         * Only put constraint if extra reg was actually allocated. Also takes
         * care of event which do not use an extra shared reg.
         *
         * Also, if this is a fake cpuc we shouldn't touch any event state
         * (reg->alloc) and we don't care about leaving inconsistent cpuc state
         * either since it'll be thrown out.
         */
        if (!reg->alloc || cpuc->is_fake)
                return;

        era = &cpuc->shared_regs->regs[reg->idx];

        /* one fewer user */
        atomic_dec(&era->ref);

        /* allocate again next time */
        reg->alloc = 0;
}

static struct event_constraint *
intel_shared_regs_constraints(struct cpu_hw_events *cpuc,
                              struct perf_event *event)
{
        struct event_constraint *c = NULL, *d;
        struct hw_perf_event_extra *xreg, *breg;

        xreg = &event->hw.extra_reg;
        if (xreg->idx != EXTRA_REG_NONE) {
                c = __intel_shared_reg_get_constraints(cpuc, event, xreg);
                if (c == &emptyconstraint)
                        return c;
        }
        breg = &event->hw.branch_reg;
        if (breg->idx != EXTRA_REG_NONE) {
                d = __intel_shared_reg_get_constraints(cpuc, event, breg);
                if (d == &emptyconstraint) {
                        __intel_shared_reg_put_constraints(cpuc, xreg);
                        c = d;
                }
        }
        return c;
}

struct event_constraint *
x86_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
{
        struct event_constraint *c;

        if (x86_pmu.event_constraints) {
                for_each_event_constraint(c, x86_pmu.event_constraints) {
                        if ((event->hw.config & c->cmask) == c->code) {
                                event->hw.flags |= c->flags;
                                return c;
                        }
                }
        }

        return &unconstrained;
}

static struct event_constraint *
intel_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
{
        struct event_constraint *c;

        c = intel_bts_constraints(event);
        if (c)
                return c;

        c = intel_pebs_constraints(event);
        if (c)
                return c;

        c = intel_shared_regs_constraints(cpuc, event);
        if (c)
                return c;

        return x86_get_event_constraints(cpuc, event);
}

static void
intel_put_shared_regs_event_constraints(struct cpu_hw_events *cpuc,
                                        struct perf_event *event)
{
        struct hw_perf_event_extra *reg;

        reg = &event->hw.extra_reg;
        if (reg->idx != EXTRA_REG_NONE)
                __intel_shared_reg_put_constraints(cpuc, reg);

        reg = &event->hw.branch_reg;
        if (reg->idx != EXTRA_REG_NONE)
                __intel_shared_reg_put_constraints(cpuc, reg);
}

static void intel_put_event_constraints(struct cpu_hw_events *cpuc,
                                        struct perf_event *event)
{
        intel_put_shared_regs_event_constraints(cpuc, event);
}

static void intel_pebs_aliases_core2(struct perf_event *event)
{
        if ((event->hw.config & X86_RAW_EVENT_MASK) == 0x003c) {
                /*
                 * Use an alternative encoding for CPU_CLK_UNHALTED.THREAD_P
                 * (0x003c) so that we can use it with PEBS.
                 *
                 * The regular CPU_CLK_UNHALTED.THREAD_P event (0x003c) isn't
                 * PEBS capable. However we can use INST_RETIRED.ANY_P
                 * (0x00c0), which is a PEBS capable event, to get the same
                 * count.
                 *
                 * INST_RETIRED.ANY_P counts the number of cycles that retires
                 * CNTMASK instructions. By setting CNTMASK to a value (16)
                 * larger than the maximum number of instructions that can be
                 * retired per cycle (4) and then inverting the condition, we
                 * count all cycles that retire 16 or less instructions, which
                 * is every cycle.
                 *
                 * Thereby we gain a PEBS capable cycle counter.
                 */
                u64 alt_config = X86_CONFIG(.event=0xc0, .inv=1, .cmask=16);

                alt_config |= (event->hw.config & ~X86_RAW_EVENT_MASK);
                event->hw.config = alt_config;
        }
}

static void intel_pebs_aliases_snb(struct perf_event *event)
{
        if ((event->hw.config & X86_RAW_EVENT_MASK) == 0x003c) {
                /*
                 * Use an alternative encoding for CPU_CLK_UNHALTED.THREAD_P
                 * (0x003c) so that we can use it with PEBS.
                 *
                 * The regular CPU_CLK_UNHALTED.THREAD_P event (0x003c) isn't
                 * PEBS capable. However we can use UOPS_RETIRED.ALL
                 * (0x01c2), which is a PEBS capable event, to get the same
                 * count.
                 *
                 * UOPS_RETIRED.ALL counts the number of cycles that retires
                 * CNTMASK micro-ops. By setting CNTMASK to a value (16)
                 * larger than the maximum number of micro-ops that can be
                 * retired per cycle (4) and then inverting the condition, we
                 * count all cycles that retire 16 or less micro-ops, which
                 * is every cycle.
                 *
                 * Thereby we gain a PEBS capable cycle counter.
                 */
                u64 alt_config = X86_CONFIG(.event=0xc2, .umask=0x01, .inv=1, .cmask=16);

                alt_config |= (event->hw.config & ~X86_RAW_EVENT_MASK);
                event->hw.config = alt_config;
        }
}

static int intel_pmu_hw_config(struct perf_event *event)
{
        int ret = x86_pmu_hw_config(event);

        if (ret)
                return ret;

        if (event->attr.precise_ip && x86_pmu.pebs_aliases)
                x86_pmu.pebs_aliases(event);

        if (intel_pmu_needs_lbr_smpl(event)) {
                ret = intel_pmu_setup_lbr_filter(event);
                if (ret)
                        return ret;
        }

        if (event->attr.type != PERF_TYPE_RAW)
                return 0;

        if (!(event->attr.config & ARCH_PERFMON_EVENTSEL_ANY))
                return 0;

        if (x86_pmu.version < 3)
                return -EINVAL;

        if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
                return -EACCES;

        event->hw.config |= ARCH_PERFMON_EVENTSEL_ANY;

        return 0;
}

struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr)
{
        if (x86_pmu.guest_get_msrs)
                return x86_pmu.guest_get_msrs(nr);
        *nr = 0;
        return NULL;
}
EXPORT_SYMBOL_GPL(perf_guest_get_msrs);

static struct perf_guest_switch_msr *intel_guest_get_msrs(int *nr)
{
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
        struct perf_guest_switch_msr *arr = cpuc->guest_switch_msrs;

        arr[0].msr = MSR_CORE_PERF_GLOBAL_CTRL;
        arr[0].host = x86_pmu.intel_ctrl & ~cpuc->intel_ctrl_guest_mask;
        arr[0].guest = x86_pmu.intel_ctrl & ~cpuc->intel_ctrl_host_mask;
        /*
         * If PMU counter has PEBS enabled it is not enough to disable counter
         * on a guest entry since PEBS memory write can overshoot guest entry
         * and corrupt guest memory. Disabling PEBS solves the problem.
         */
        arr[1].msr = MSR_IA32_PEBS_ENABLE;
        arr[1].host = cpuc->pebs_enabled;
        arr[1].guest = 0;

        *nr = 2;
        return arr;
}

static struct perf_guest_switch_msr *core_guest_get_msrs(int *nr)
{
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
        struct perf_guest_switch_msr *arr = cpuc->guest_switch_msrs;
        int idx;

        for (idx = 0; idx < x86_pmu.num_counters; idx++)  {
                struct perf_event *event = cpuc->events[idx];

                arr[idx].msr = x86_pmu_config_addr(idx);
                arr[idx].host = arr[idx].guest = 0;

                if (!test_bit(idx, cpuc->active_mask))
                        continue;

                arr[idx].host = arr[idx].guest =
                        event->hw.config | ARCH_PERFMON_EVENTSEL_ENABLE;

                if (event->attr.exclude_host)
                        arr[idx].host &= ~ARCH_PERFMON_EVENTSEL_ENABLE;
                else if (event->attr.exclude_guest)
                        arr[idx].guest &= ~ARCH_PERFMON_EVENTSEL_ENABLE;
        }

        *nr = x86_pmu.num_counters;
        return arr;
}

static void core_pmu_enable_event(struct perf_event *event)
{
        if (!event->attr.exclude_host)
                x86_pmu_enable_event(event);
}

static void core_pmu_enable_all(int added)
{
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
        int idx;

        for (idx = 0; idx < x86_pmu.num_counters; idx++) {
                struct hw_perf_event *hwc = &cpuc->events[idx]->hw;

                if (!test_bit(idx, cpuc->active_mask) ||
                                cpuc->events[idx]->attr.exclude_host)
                        continue;

                __x86_pmu_enable_event(hwc, ARCH_PERFMON_EVENTSEL_ENABLE);
        }
}

static int hsw_hw_config(struct perf_event *event)
{
        int ret = intel_pmu_hw_config(event);

        if (ret)
                return ret;
        if (!boot_cpu_has(X86_FEATURE_RTM) && !boot_cpu_has(X86_FEATURE_HLE))
                return 0;
        event->hw.config |= event->attr.config & (HSW_IN_TX|HSW_IN_TX_CHECKPOINTED);

        /*
         * IN_TX/IN_TX-CP filters are not supported by the Haswell PMU with
         * PEBS or in ANY thread mode. Since the results are non-sensical forbid
         * this combination.
         */
        if ((event->hw.config & (HSW_IN_TX|HSW_IN_TX_CHECKPOINTED)) &&
             ((event->hw.config & ARCH_PERFMON_EVENTSEL_ANY) ||
              event->attr.precise_ip > 0))
                return -EOPNOTSUPP;

        return 0;
}

static struct event_constraint counter2_constraint =
                        EVENT_CONSTRAINT(0, 0x4, 0);

static struct event_constraint *
hsw_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
{
        struct event_constraint *c = intel_get_event_constraints(cpuc, event);

        /* Handle special quirk on in_tx_checkpointed only in counter 2 */
        if (event->hw.config & HSW_IN_TX_CHECKPOINTED) {
                if (c->idxmsk64 & (1U << 2))
                        return &counter2_constraint;
                return &emptyconstraint;
        }

        return c;
}

PMU_FORMAT_ATTR(event,  "config:0-7"    );
PMU_FORMAT_ATTR(umask,  "config:8-15"   );
PMU_FORMAT_ATTR(edge,   "config:18"     );
PMU_FORMAT_ATTR(pc,     "config:19"     );
PMU_FORMAT_ATTR(any,    "config:21"     ); /* v3 + */
PMU_FORMAT_ATTR(inv,    "config:23"     );
PMU_FORMAT_ATTR(cmask,  "config:24-31"  );
PMU_FORMAT_ATTR(in_tx,  "config:32");
PMU_FORMAT_ATTR(in_tx_cp, "config:33");

static struct attribute *intel_arch_formats_attr[] = {
        &format_attr_event.attr,
        &format_attr_umask.attr,
        &format_attr_edge.attr,
        &format_attr_pc.attr,
        &format_attr_inv.attr,
        &format_attr_cmask.attr,
        NULL,
};

ssize_t intel_event_sysfs_show(char *page, u64 config)
{
        u64 event = (config & ARCH_PERFMON_EVENTSEL_EVENT);

        return x86_event_sysfs_show(page, config, event);
}

static __initconst const struct x86_pmu core_pmu = {
        .name                   = "core",
        .handle_irq             = x86_pmu_handle_irq,
        .disable_all            = x86_pmu_disable_all,
        .enable_all             = core_pmu_enable_all,
        .enable                 = core_pmu_enable_event,
        .disable                = x86_pmu_disable_event,
        .hw_config              = x86_pmu_hw_config,
        .schedule_events        = x86_schedule_events,
        .eventsel               = MSR_ARCH_PERFMON_EVENTSEL0,
        .perfctr                = MSR_ARCH_PERFMON_PERFCTR0,
        .event_map              = intel_pmu_event_map,
        .max_events             = ARRAY_SIZE(intel_perfmon_event_map),
        .apic                   = 1,
        /*
         * Intel PMCs cannot be accessed sanely above 32 bit width,
         * so we install an artificial 1<<31 period regardless of
         * the generic event period:
         */
        .max_period             = (1ULL << 31) - 1,
        .get_event_constraints  = intel_get_event_constraints,
        .put_event_constraints  = intel_put_event_constraints,
        .event_constraints      = intel_core_event_constraints,
        .guest_get_msrs         = core_guest_get_msrs,
        .format_attrs           = intel_arch_formats_attr,
        .events_sysfs_show      = intel_event_sysfs_show,
};

struct intel_shared_regs *allocate_shared_regs(int cpu)
{
        struct intel_shared_regs *regs;
        int i;

        regs = kzalloc_node(sizeof(struct intel_shared_regs),
                            GFP_KERNEL, cpu_to_node(cpu));
        if (regs) {
                /*
                 * initialize the locks to keep lockdep happy
                 */
                for (i = 0; i < EXTRA_REG_MAX; i++)
                        raw_spin_lock_init(&regs->regs[i].lock);

                regs->core_id = -1;
        }
        return regs;
}

static int intel_pmu_cpu_prepare(int cpu)
{
        struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);

        if (!(x86_pmu.extra_regs || x86_pmu.lbr_sel_map))
                return NOTIFY_OK;

        cpuc->shared_regs = allocate_shared_regs(cpu);
        if (!cpuc->shared_regs)
                return NOTIFY_BAD;

        return NOTIFY_OK;
}

static void intel_pmu_cpu_starting(int cpu)
{
        struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
        int core_id = topology_core_id(cpu);
        int i;

        init_debug_store_on_cpu(cpu);
        /*
         * Deal with CPUs that don't clear their LBRs on power-up.
         */
        intel_pmu_lbr_reset();

        cpuc->lbr_sel = NULL;

        if (!cpuc->shared_regs)
                return;

        if (!(x86_pmu.er_flags & ERF_NO_HT_SHARING)) {
                for_each_cpu(i, topology_thread_cpumask(cpu)) {
                        struct intel_shared_regs *pc;

                        pc = per_cpu(cpu_hw_events, i).shared_regs;
                        if (pc && pc->core_id == core_id) {
                                cpuc->kfree_on_online = cpuc->shared_regs;
                                cpuc->shared_regs = pc;
                                break;
                        }
                }
                cpuc->shared_regs->core_id = core_id;
                cpuc->shared_regs->refcnt++;
        }

        if (x86_pmu.lbr_sel_map)
                cpuc->lbr_sel = &cpuc->shared_regs->regs[EXTRA_REG_LBR];
}

static void intel_pmu_cpu_dying(int cpu)
{
        struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
        struct intel_shared_regs *pc;

        pc = cpuc->shared_regs;
        if (pc) {
                if (pc->core_id == -1 || --pc->refcnt == 0)
                        kfree(pc);
                cpuc->shared_regs = NULL;
        }

        fini_debug_store_on_cpu(cpu);
}

static void intel_pmu_flush_branch_stack(void)
{
        /*
         * Intel LBR does not tag entries with the
         * PID of the current task, then we need to
         * flush it on ctxsw
         * For now, we simply reset it
         */
        if (x86_pmu.lbr_nr)
                intel_pmu_lbr_reset();
}

PMU_FORMAT_ATTR(offcore_rsp, "config1:0-63");

PMU_FORMAT_ATTR(ldlat, "config1:0-15");

static struct attribute *intel_arch3_formats_attr[] = {
        &format_attr_event.attr,
        &format_attr_umask.attr,
        &format_attr_edge.attr,
        &format_attr_pc.attr,
        &format_attr_any.attr,
        &format_attr_inv.attr,
        &format_attr_cmask.attr,
        &format_attr_in_tx.attr,
        &format_attr_in_tx_cp.attr,

        &format_attr_offcore_rsp.attr, /* XXX do NHM/WSM + SNB breakout */
        &format_attr_ldlat.attr, /* PEBS load latency */
        NULL,
};

static __initconst const struct x86_pmu intel_pmu = {
        .name                   = "Intel",
        .handle_irq             = intel_pmu_handle_irq,
        .disable_all            = intel_pmu_disable_all,
        .enable_all             = intel_pmu_enable_all,
        .enable                 = intel_pmu_enable_event,
        .disable                = intel_pmu_disable_event,
        .hw_config              = intel_pmu_hw_config,
        .schedule_events        = x86_schedule_events,
        .eventsel               = MSR_ARCH_PERFMON_EVENTSEL0,
        .perfctr                = MSR_ARCH_PERFMON_PERFCTR0,
        .event_map              = intel_pmu_event_map,
        .max_events             = ARRAY_SIZE(intel_perfmon_event_map),
        .apic                   = 1,
        /*
         * Intel PMCs cannot be accessed sanely above 32 bit width,
         * so we install an artificial 1<<31 period regardless of
         * the generic event period:
         */
        .max_period             = (1ULL << 31) - 1,
        .get_event_constraints  = intel_get_event_constraints,
        .put_event_constraints  = intel_put_event_constraints,
        .pebs_aliases           = intel_pebs_aliases_core2,

        .format_attrs           = intel_arch3_formats_attr,
        .events_sysfs_show      = intel_event_sysfs_show,

        .cpu_prepare            = intel_pmu_cpu_prepare,
        .cpu_starting           = intel_pmu_cpu_starting,
        .cpu_dying              = intel_pmu_cpu_dying,
        .guest_get_msrs         = intel_guest_get_msrs,
        .flush_branch_stack     = intel_pmu_flush_branch_stack,
};

static __init void intel_clovertown_quirk(void)
{
        /*
         * PEBS is unreliable due to:
         *
         *   AJ67  - PEBS may experience CPL leaks
         *   AJ68  - PEBS PMI may be delayed by one event
         *   AJ69  - GLOBAL_STATUS[62] will only be set when DEBUGCTL[12]
         *   AJ106 - FREEZE_LBRS_ON_PMI doesn't work in combination with PEBS
         *
         * AJ67 could be worked around by restricting the OS/USR flags.
         * AJ69 could be worked around by setting PMU_FREEZE_ON_PMI.
         *
         * AJ106 could possibly be worked around by not allowing LBR
         *       usage from PEBS, including the fixup.
         * AJ68  could possibly be worked around by always programming
         *       a pebs_event_reset[0] value and coping with the lost events.
         *
         * But taken together it might just make sense to not enable PEBS on
         * these chips.
         */
        pr_warn("PEBS disabled due to CPU errata\n");
        x86_pmu.pebs = 0;
        x86_pmu.pebs_constraints = NULL;
}

static int intel_snb_pebs_broken(int cpu)
{
        u32 rev = UINT_MAX; /* default to broken for unknown models */

        switch (cpu_data(cpu).x86_model) {
        case 42: /* SNB */
                rev = 0x28;
                break;

        case 45: /* SNB-EP */
                switch (cpu_data(cpu).x86_mask) {
                case 6: rev = 0x618; break;
                case 7: rev = 0x70c; break;
                }
        }

        return (cpu_data(cpu).microcode < rev);
}

static void intel_snb_check_microcode(void)
{
        int pebs_broken = 0;
        int cpu;

        get_online_cpus();
        for_each_online_cpu(cpu) {
                if ((pebs_broken = intel_snb_pebs_broken(cpu)))
                        break;
        }
        put_online_cpus();

        if (pebs_broken == x86_pmu.pebs_broken)
                return;

        /*
         * Serialized by the microcode lock..
         */
        if (x86_pmu.pebs_broken) {
                pr_info("PEBS enabled due to microcode update\n");
                x86_pmu.pebs_broken = 0;
        } else {
                pr_info("PEBS disabled due to CPU errata, please upgrade microcode\n");
                x86_pmu.pebs_broken = 1;
        }
}

static __init void intel_sandybridge_quirk(void)
{
        x86_pmu.check_microcode = intel_snb_check_microcode;
        intel_snb_check_microcode();
}

static const struct { int id; char *name; } intel_arch_events_map[] __initconst = {
        { PERF_COUNT_HW_CPU_CYCLES, "cpu cycles" },
        { PERF_COUNT_HW_INSTRUCTIONS, "instructions" },
        { PERF_COUNT_HW_BUS_CYCLES, "bus cycles" },
        { PERF_COUNT_HW_CACHE_REFERENCES, "cache references" },

        { PERF_COUNT_HW_CACHE_MISSES, "cache misses" },
        { PERF_COUNT_HW_BRANCH_INSTRUCTIONS, "branch instructions" },
        { PERF_COUNT_HW_BRANCH_MISSES, "branch misses" },
};

static __init void intel_arch_events_quirk(void)
{
        int bit;

        /* disable event that reported as not presend by cpuid */
        for_each_set_bit(bit, x86_pmu.events_mask, ARRAY_SIZE(intel_arch_events_map)) {
                intel_perfmon_event_map[intel_arch_events_map[bit].id] = 0;
                pr_warn("CPUID marked event: \'%s\' unavailable\n",
                        intel_arch_events_map[bit].name);
        }
}

static __init void intel_nehalem_quirk(void)
{
        union cpuid10_ebx ebx;

        ebx.full = x86_pmu.events_maskl;
        if (ebx.split.no_branch_misses_retired) {
                /*
                 * Erratum AAJ80 detected, we work it around by using
                 * the BR_MISP_EXEC.ANY event. This will over-count
                 * branch-misses, but it's still much better than the
                 * architectural event which is often completely bogus:
                 */
                intel_perfmon_event_map[PERF_COUNT_HW_BRANCH_MISSES] = 0x7f89;
                ebx.split.no_branch_misses_retired = 0;
                x86_pmu.events_maskl = ebx.full;
                pr_info("CPU erratum AAJ80 worked around\n");
        }
}

EVENT_ATTR_STR(mem-loads,      mem_ld_hsw,     "event=0xcd,umask=0x1,ldlat=3");
EVENT_ATTR_STR(mem-stores,     mem_st_hsw,     "event=0xd0,umask=0x82")

static struct attribute *hsw_events_attrs[] = {
        EVENT_PTR(mem_ld_hsw),
        EVENT_PTR(mem_st_hsw),
        NULL
};

__init int intel_pmu_init(void)
{
        union cpuid10_edx edx;
        union cpuid10_eax eax;
        union cpuid10_ebx ebx;
        struct event_constraint *c;
        unsigned int unused;
        int version;

        if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) {
                switch (boot_cpu_data.x86) {
                case 0x6:
                        return p6_pmu_init();
                case 0xb:
                        return knc_pmu_init();
                case 0xf:
                        return p4_pmu_init();
                }
                return -ENODEV;
        }

        /*
         * Check whether the Architectural PerfMon supports
         * Branch Misses Retired hw_event or not.
         */
        cpuid(10, &eax.full, &ebx.full, &unused, &edx.full);
        if (eax.split.mask_length < ARCH_PERFMON_EVENTS_COUNT)
                return -ENODEV;

        version = eax.split.version_id;
        if (version < 2)
                x86_pmu = core_pmu;
        else
                x86_pmu = intel_pmu;

        x86_pmu.version                 = version;
        x86_pmu.num_counters            = eax.split.num_counters;
        x86_pmu.cntval_bits             = eax.split.bit_width;
        x86_pmu.cntval_mask             = (1ULL << eax.split.bit_width) - 1;

        x86_pmu.events_maskl            = ebx.full;
        x86_pmu.events_mask_len         = eax.split.mask_length;

        x86_pmu.max_pebs_events         = min_t(unsigned, MAX_PEBS_EVENTS, x86_pmu.num_counters);

        /*
         * Quirk: v2 perfmon does not report fixed-purpose events, so
         * assume at least 3 events:
         */
        if (version > 1)
                x86_pmu.num_counters_fixed = max((int)edx.split.num_counters_fixed, 3);

        /*
         * v2 and above have a perf capabilities MSR
         */
        if (version > 1) {
                u64 capabilities;

                rdmsrl(MSR_IA32_PERF_CAPABILITIES, capabilities);
                x86_pmu.intel_cap.capabilities = capabilities;
        }

        intel_ds_init();

        x86_add_quirk(intel_arch_events_quirk); /* Install first, so it runs last */

        /*
         * Install the hw-cache-events table:
         */
        switch (boot_cpu_data.x86_model) {
        case 14: /* 65 nm core solo/duo, "Yonah" */
                pr_cont("Core events, ");
                break;

        case 15: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
                x86_add_quirk(intel_clovertown_quirk);
        case 22: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
        case 23: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
        case 29: /* six-core 45 nm xeon "Dunnington" */
                memcpy(hw_cache_event_ids, core2_hw_cache_event_ids,
                       sizeof(hw_cache_event_ids));

                intel_pmu_lbr_init_core();

                x86_pmu.event_constraints = intel_core2_event_constraints;
                x86_pmu.pebs_constraints = intel_core2_pebs_event_constraints;
                pr_cont("Core2 events, ");
                break;

        case 26: /* 45 nm nehalem, "Bloomfield" */
        case 30: /* 45 nm nehalem, "Lynnfield" */
        case 46: /* 45 nm nehalem-ex, "Beckton" */
                memcpy(hw_cache_event_ids, nehalem_hw_cache_event_ids,
                       sizeof(hw_cache_event_ids));
                memcpy(hw_cache_extra_regs, nehalem_hw_cache_extra_regs,
                       sizeof(hw_cache_extra_regs));

                intel_pmu_lbr_init_nhm();

                x86_pmu.event_constraints = intel_nehalem_event_constraints;
                x86_pmu.pebs_constraints = intel_nehalem_pebs_event_constraints;
                x86_pmu.enable_all = intel_pmu_nhm_enable_all;
                x86_pmu.extra_regs = intel_nehalem_extra_regs;

                x86_pmu.cpu_events = nhm_events_attrs;

                /* UOPS_ISSUED.STALLED_CYCLES */
                intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
                        X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);
                /* UOPS_EXECUTED.CORE_ACTIVE_CYCLES,c=1,i=1 */
                intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] =
                        X86_CONFIG(.event=0xb1, .umask=0x3f, .inv=1, .cmask=1);

                x86_add_quirk(intel_nehalem_quirk);

                pr_cont("Nehalem events, ");
                break;

        case 28: /* Atom */
        case 38: /* Lincroft */
        case 39: /* Penwell */
        case 53: /* Cloverview */
        case 54: /* Cedarview */
                memcpy(hw_cache_event_ids, atom_hw_cache_event_ids,
                       sizeof(hw_cache_event_ids));

                intel_pmu_lbr_init_atom();

                x86_pmu.event_constraints = intel_gen_event_constraints;
                x86_pmu.pebs_constraints = intel_atom_pebs_event_constraints;
                pr_cont("Atom events, ");
                break;

        case 37: /* 32 nm nehalem, "Clarkdale" */
        case 44: /* 32 nm nehalem, "Gulftown" */
        case 47: /* 32 nm Xeon E7 */
                memcpy(hw_cache_event_ids, westmere_hw_cache_event_ids,
                       sizeof(hw_cache_event_ids));
                memcpy(hw_cache_extra_regs, nehalem_hw_cache_extra_regs,
                       sizeof(hw_cache_extra_regs));

                intel_pmu_lbr_init_nhm();

                x86_pmu.event_constraints = intel_westmere_event_constraints;
                x86_pmu.enable_all = intel_pmu_nhm_enable_all;
                x86_pmu.pebs_constraints = intel_westmere_pebs_event_constraints;
                x86_pmu.extra_regs = intel_westmere_extra_regs;
                x86_pmu.er_flags |= ERF_HAS_RSP_1;

                x86_pmu.cpu_events = nhm_events_attrs;

                /* UOPS_ISSUED.STALLED_CYCLES */
                intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
                        X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);
                /* UOPS_EXECUTED.CORE_ACTIVE_CYCLES,c=1,i=1 */
                intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] =
                        X86_CONFIG(.event=0xb1, .umask=0x3f, .inv=1, .cmask=1);

                pr_cont("Westmere events, ");
                break;

        case 42: /* SandyBridge */
        case 45: /* SandyBridge, "Romely-EP" */
                x86_add_quirk(intel_sandybridge_quirk);
                memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
                       sizeof(hw_cache_event_ids));
                memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs,
                       sizeof(hw_cache_extra_regs));

                intel_pmu_lbr_init_snb();

                x86_pmu.event_constraints = intel_snb_event_constraints;
                x86_pmu.pebs_constraints = intel_snb_pebs_event_constraints;
                x86_pmu.pebs_aliases = intel_pebs_aliases_snb;
                if (boot_cpu_data.x86_model == 45)
                        x86_pmu.extra_regs = intel_snbep_extra_regs;
                else
                        x86_pmu.extra_regs = intel_snb_extra_regs;
                /* all extra regs are per-cpu when HT is on */
                x86_pmu.er_flags |= ERF_HAS_RSP_1;
                x86_pmu.er_flags |= ERF_NO_HT_SHARING;

                x86_pmu.cpu_events = snb_events_attrs;

                /* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */
                intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
                        X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);
                /* UOPS_DISPATCHED.THREAD,c=1,i=1 to count stall cycles*/
                intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] =
                        X86_CONFIG(.event=0xb1, .umask=0x01, .inv=1, .cmask=1);

                pr_cont("SandyBridge events, ");
                break;
        case 58: /* IvyBridge */
        case 62: /* IvyBridge EP */
                memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
                       sizeof(hw_cache_event_ids));
                memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs,
                       sizeof(hw_cache_extra_regs));

                intel_pmu_lbr_init_snb();

                x86_pmu.event_constraints = intel_ivb_event_constraints;
                x86_pmu.pebs_constraints = intel_ivb_pebs_event_constraints;
                x86_pmu.pebs_aliases = intel_pebs_aliases_snb;
                if (boot_cpu_data.x86_model == 62)
                        x86_pmu.extra_regs = intel_snbep_extra_regs;
                else
                        x86_pmu.extra_regs = intel_snb_extra_regs;
                /* all extra regs are per-cpu when HT is on */
                x86_pmu.er_flags |= ERF_HAS_RSP_1;
                x86_pmu.er_flags |= ERF_NO_HT_SHARING;

                x86_pmu.cpu_events = snb_events_attrs;

                /* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */
                intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
                        X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);

                pr_cont("IvyBridge events, ");
                break;


        case 60: /* Haswell Client */
        case 70:
        case 71:
        case 63:
        case 69:
                x86_pmu.late_ack = true;
                memcpy(hw_cache_event_ids, snb_hw_cache_event_ids, sizeof(hw_cache_event_ids));
                memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs, sizeof(hw_cache_extra_regs));

                intel_pmu_lbr_init_snb();

                x86_pmu.event_constraints = intel_hsw_event_constraints;
                x86_pmu.pebs_constraints = intel_hsw_pebs_event_constraints;
                x86_pmu.extra_regs = intel_snb_extra_regs;
                x86_pmu.pebs_aliases = intel_pebs_aliases_snb;
                /* all extra regs are per-cpu when HT is on */
                x86_pmu.er_flags |= ERF_HAS_RSP_1;
                x86_pmu.er_flags |= ERF_NO_HT_SHARING;

                x86_pmu.hw_config = hsw_hw_config;
                x86_pmu.get_event_constraints = hsw_get_event_constraints;
                x86_pmu.cpu_events = hsw_events_attrs;
                pr_cont("Haswell events, ");
                break;

        default:
                switch (x86_pmu.version) {
                case 1:
                        x86_pmu.event_constraints = intel_v1_event_constraints;
                        pr_cont("generic architected perfmon v1, ");
                        break;
                default:
                        /*
                         * default constraints for v2 and up
                         */
                        x86_pmu.event_constraints = intel_gen_event_constraints;
                        pr_cont("generic architected perfmon, ");
                        break;
                }
        }

        if (x86_pmu.num_counters > INTEL_PMC_MAX_GENERIC) {
                WARN(1, KERN_ERR "hw perf events %d > max(%d), clipping!",
                     x86_pmu.num_counters, INTEL_PMC_MAX_GENERIC);
                x86_pmu.num_counters = INTEL_PMC_MAX_GENERIC;
        }
        x86_pmu.intel_ctrl = (1 << x86_pmu.num_counters) - 1;

        if (x86_pmu.num_counters_fixed > INTEL_PMC_MAX_FIXED) {
                WARN(1, KERN_ERR "hw perf events fixed %d > max(%d), clipping!",
                     x86_pmu.num_counters_fixed, INTEL_PMC_MAX_FIXED);
                x86_pmu.num_counters_fixed = INTEL_PMC_MAX_FIXED;
        }

        x86_pmu.intel_ctrl |=
                ((1LL << x86_pmu.num_counters_fixed)-1) << INTEL_PMC_IDX_FIXED;

        if (x86_pmu.event_constraints) {
                /*
                 * event on fixed counter2 (REF_CYCLES) only works on this
                 * counter, so do not extend mask to generic counters
                 */
                for_each_event_constraint(c, x86_pmu.event_constraints) {
                        if (c->cmask != FIXED_EVENT_FLAGS
                            || c->idxmsk64 == INTEL_PMC_MSK_FIXED_REF_CYCLES) {
                                continue;
                        }

                        c->idxmsk64 |= (1ULL << x86_pmu.num_counters) - 1;
                        c->weight += x86_pmu.num_counters;
                }
        }

        /* Support full width counters using alternative MSR range */
        if (x86_pmu.intel_cap.full_width_write) {
                x86_pmu.max_period = x86_pmu.cntval_mask;
                x86_pmu.perfctr = MSR_IA32_PMC0;
                pr_cont("full-width counters, ");
        }

        return 0;
}