arch/x86/kernel/cpu/perf_event_intel.c

   1 /*
   2  * Per core/cpu state
   3  *
   4  * Used to coordinate shared registers between HT threads or
   5  * among events on a single PMU.
   6  */
   7
   8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/stddef.h>
  11 #include <linux/types.h>
  12 #include <linux/init.h>
  13 #include <linux/slab.h>
  14 #include <linux/export.h>
  15
  16 #include <asm/hardirq.h>
  17 #include <asm/apic.h>
  18
  19 #include "perf_event.h"
  20
  21 /*
  22  * Intel PerfMon, used on Core and later.
  23  */
  24 static u64 intel_perfmon_event_map[PERF_COUNT_HW_MAX] __read_mostly =
  25 {
  26         [PERF_COUNT_HW_CPU_CYCLES]              = 0x003c,
  27         [PERF_COUNT_HW_INSTRUCTIONS]            = 0x00c0,
  28         [PERF_COUNT_HW_CACHE_REFERENCES]        = 0x4f2e,
  29         [PERF_COUNT_HW_CACHE_MISSES]            = 0x412e,
  30         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = 0x00c4,
  31         [PERF_COUNT_HW_BRANCH_MISSES]           = 0x00c5,
  32         [PERF_COUNT_HW_BUS_CYCLES]              = 0x013c,
  33         [PERF_COUNT_HW_REF_CPU_CYCLES]          = 0x0300, /* pseudo-encoding */
  34 };
  35
  36 static struct event_constraint intel_core_event_constraints[] __read_mostly =
  37 {
  38         INTEL_EVENT_CONSTRAINT(0x11, 0x2), /* FP_ASSIST */
  39         INTEL_EVENT_CONSTRAINT(0x12, 0x2), /* MUL */
  40         INTEL_EVENT_CONSTRAINT(0x13, 0x2), /* DIV */
  41         INTEL_EVENT_CONSTRAINT(0x14, 0x1), /* CYCLES_DIV_BUSY */
  42         INTEL_EVENT_CONSTRAINT(0x19, 0x2), /* DELAYED_BYPASS */
  43         INTEL_EVENT_CONSTRAINT(0xc1, 0x1), /* FP_COMP_INSTR_RET */
  44         EVENT_CONSTRAINT_END
  45 };
  46
  47 static struct event_constraint intel_core2_event_constraints[] __read_mostly =
  48 {
  49         FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
  50         FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
  51         FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
  52         INTEL_EVENT_CONSTRAINT(0x10, 0x1), /* FP_COMP_OPS_EXE */
  53         INTEL_EVENT_CONSTRAINT(0x11, 0x2), /* FP_ASSIST */
  54         INTEL_EVENT_CONSTRAINT(0x12, 0x2), /* MUL */
  55         INTEL_EVENT_CONSTRAINT(0x13, 0x2), /* DIV */
  56         INTEL_EVENT_CONSTRAINT(0x14, 0x1), /* CYCLES_DIV_BUSY */
  57         INTEL_EVENT_CONSTRAINT(0x18, 0x1), /* IDLE_DURING_DIV */
  58         INTEL_EVENT_CONSTRAINT(0x19, 0x2), /* DELAYED_BYPASS */
  59         INTEL_EVENT_CONSTRAINT(0xa1, 0x1), /* RS_UOPS_DISPATCH_CYCLES */
  60         INTEL_EVENT_CONSTRAINT(0xc9, 0x1), /* ITLB_MISS_RETIRED (T30-9) */
  61         INTEL_EVENT_CONSTRAINT(0xcb, 0x1), /* MEM_LOAD_RETIRED */
  62         EVENT_CONSTRAINT_END
  63 };
  64
  65 static struct event_constraint intel_nehalem_event_constraints[] __read_mostly =
  66 {
  67         FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
  68         FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
  69         FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
  70         INTEL_EVENT_CONSTRAINT(0x40, 0x3), /* L1D_CACHE_LD */
  71         INTEL_EVENT_CONSTRAINT(0x41, 0x3), /* L1D_CACHE_ST */
  72         INTEL_EVENT_CONSTRAINT(0x42, 0x3), /* L1D_CACHE_LOCK */
  73         INTEL_EVENT_CONSTRAINT(0x43, 0x3), /* L1D_ALL_REF */
  74         INTEL_EVENT_CONSTRAINT(0x48, 0x3), /* L1D_PEND_MISS */
  75         INTEL_EVENT_CONSTRAINT(0x4e, 0x3), /* L1D_PREFETCH */
  76         INTEL_EVENT_CONSTRAINT(0x51, 0x3), /* L1D */
  77         INTEL_EVENT_CONSTRAINT(0x63, 0x3), /* CACHE_LOCK_CYCLES */
  78         EVENT_CONSTRAINT_END
  79 };
  80
  81 static struct extra_reg intel_nehalem_extra_regs[] __read_mostly =
  82 {
  83         INTEL_EVENT_EXTRA_REG(0xb7, MSR_OFFCORE_RSP_0, 0xffff, RSP_0),
  84         EVENT_EXTRA_END
  85 };
  86
  87 static struct event_constraint intel_westmere_event_constraints[] __read_mostly =
  88 {
  89         FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
  90         FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
  91         FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
  92         INTEL_EVENT_CONSTRAINT(0x51, 0x3), /* L1D */
  93         INTEL_EVENT_CONSTRAINT(0x60, 0x1), /* OFFCORE_REQUESTS_OUTSTANDING */
  94         INTEL_EVENT_CONSTRAINT(0x63, 0x3), /* CACHE_LOCK_CYCLES */
  95         INTEL_EVENT_CONSTRAINT(0xb3, 0x1), /* SNOOPQ_REQUEST_OUTSTANDING */
  96         EVENT_CONSTRAINT_END
  97 };
  98
  99 static struct event_constraint intel_snb_event_constraints[] __read_mostly =
 100 {
 101         FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
 102         FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
 103         FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
 104         INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
 105         INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
 106         INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
 107         EVENT_CONSTRAINT_END
 108 };
 109
 110 static struct extra_reg intel_westmere_extra_regs[] __read_mostly =
 111 {
 112         INTEL_EVENT_EXTRA_REG(0xb7, MSR_OFFCORE_RSP_0, 0xffff, RSP_0),
 113         INTEL_EVENT_EXTRA_REG(0xbb, MSR_OFFCORE_RSP_1, 0xffff, RSP_1),
 114         EVENT_EXTRA_END
 115 };
 116
 117 static struct event_constraint intel_v1_event_constraints[] __read_mostly =
 118 {
 119         EVENT_CONSTRAINT_END
 120 };
 121
 122 static struct event_constraint intel_gen_event_constraints[] __read_mostly =
 123 {
 124         FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
 125         FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
 126         FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
 127         EVENT_CONSTRAINT_END
 128 };
 129
 130 static struct extra_reg intel_snb_extra_regs[] __read_mostly = {
 131         INTEL_EVENT_EXTRA_REG(0xb7, MSR_OFFCORE_RSP_0, 0x3fffffffffull, RSP_0),
 132         INTEL_EVENT_EXTRA_REG(0xbb, MSR_OFFCORE_RSP_1, 0x3fffffffffull, RSP_1),
 133         EVENT_EXTRA_END
 134 };
 135
 136 static u64 intel_pmu_event_map(int hw_event)
 137 {
 138         return intel_perfmon_event_map[hw_event];
 139 }
 140
 141 #define SNB_DMND_DATA_RD        (1ULL << 0)
 142 #define SNB_DMND_RFO            (1ULL << 1)
 143 #define SNB_DMND_IFETCH         (1ULL << 2)
 144 #define SNB_DMND_WB             (1ULL << 3)
 145 #define SNB_PF_DATA_RD          (1ULL << 4)
 146 #define SNB_PF_RFO              (1ULL << 5)
 147 #define SNB_PF_IFETCH           (1ULL << 6)
 148 #define SNB_LLC_DATA_RD         (1ULL << 7)
 149 #define SNB_LLC_RFO             (1ULL << 8)
 150 #define SNB_LLC_IFETCH          (1ULL << 9)
 151 #define SNB_BUS_LOCKS           (1ULL << 10)
 152 #define SNB_STRM_ST             (1ULL << 11)
 153 #define SNB_OTHER               (1ULL << 15)
 154 #define SNB_RESP_ANY            (1ULL << 16)
 155 #define SNB_NO_SUPP             (1ULL << 17)
 156 #define SNB_LLC_HITM            (1ULL << 18)
 157 #define SNB_LLC_HITE            (1ULL << 19)
 158 #define SNB_LLC_HITS            (1ULL << 20)
 159 #define SNB_LLC_HITF            (1ULL << 21)
 160 #define SNB_LOCAL               (1ULL << 22)
 161 #define SNB_REMOTE              (0xffULL << 23)
 162 #define SNB_SNP_NONE            (1ULL << 31)
 163 #define SNB_SNP_NOT_NEEDED      (1ULL << 32)
 164 #define SNB_SNP_MISS            (1ULL << 33)
 165 #define SNB_NO_FWD              (1ULL << 34)
 166 #define SNB_SNP_FWD             (1ULL << 35)
 167 #define SNB_HITM                (1ULL << 36)
 168 #define SNB_NON_DRAM            (1ULL << 37)
 169
 170 #define SNB_DMND_READ           (SNB_DMND_DATA_RD|SNB_LLC_DATA_RD)
 171 #define SNB_DMND_WRITE          (SNB_DMND_RFO|SNB_LLC_RFO)
 172 #define SNB_DMND_PREFETCH       (SNB_PF_DATA_RD|SNB_PF_RFO)
 173
 174 #define SNB_SNP_ANY             (SNB_SNP_NONE|SNB_SNP_NOT_NEEDED| \
 175                                  SNB_SNP_MISS|SNB_NO_FWD|SNB_SNP_FWD| \
 176                                  SNB_HITM)
 177
 178 #define SNB_DRAM_ANY            (SNB_LOCAL|SNB_REMOTE|SNB_SNP_ANY)
 179 #define SNB_DRAM_REMOTE         (SNB_REMOTE|SNB_SNP_ANY)
 180
 181 #define SNB_L3_ACCESS           SNB_RESP_ANY
 182 #define SNB_L3_MISS             (SNB_DRAM_ANY|SNB_NON_DRAM)
 183
 184 static __initconst const u64 snb_hw_cache_extra_regs
 185                                 [PERF_COUNT_HW_CACHE_MAX]
 186                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 187                                 [PERF_COUNT_HW_CACHE_RESULT_MAX] =
 188 {
 189  [ C(LL  ) ] = {
 190         [ C(OP_READ) ] = {
 191                 [ C(RESULT_ACCESS) ] = SNB_DMND_READ|SNB_L3_ACCESS,
 192                 [ C(RESULT_MISS)   ] = SNB_DMND_READ|SNB_L3_MISS,
 193         },
 194         [ C(OP_WRITE) ] = {
 195                 [ C(RESULT_ACCESS) ] = SNB_DMND_WRITE|SNB_L3_ACCESS,
 196                 [ C(RESULT_MISS)   ] = SNB_DMND_WRITE|SNB_L3_MISS,
 197         },
 198         [ C(OP_PREFETCH) ] = {
 199                 [ C(RESULT_ACCESS) ] = SNB_DMND_PREFETCH|SNB_L3_ACCESS,
 200                 [ C(RESULT_MISS)   ] = SNB_DMND_PREFETCH|SNB_L3_MISS,
 201         },
 202  },
 203  [ C(NODE) ] = {
 204         [ C(OP_READ) ] = {
 205                 [ C(RESULT_ACCESS) ] = SNB_DMND_READ|SNB_DRAM_ANY,
 206                 [ C(RESULT_MISS)   ] = SNB_DMND_READ|SNB_DRAM_REMOTE,
 207         },
 208         [ C(OP_WRITE) ] = {
 209                 [ C(RESULT_ACCESS) ] = SNB_DMND_WRITE|SNB_DRAM_ANY,
 210                 [ C(RESULT_MISS)   ] = SNB_DMND_WRITE|SNB_DRAM_REMOTE,
 211         },
 212         [ C(OP_PREFETCH) ] = {
 213                 [ C(RESULT_ACCESS) ] = SNB_DMND_PREFETCH|SNB_DRAM_ANY,
 214                 [ C(RESULT_MISS)   ] = SNB_DMND_PREFETCH|SNB_DRAM_REMOTE,
 215         },
 216  },
 217 };
 218
 219 static __initconst const u64 snb_hw_cache_event_ids
 220                                 [PERF_COUNT_HW_CACHE_MAX]
 221                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 222                                 [PERF_COUNT_HW_CACHE_RESULT_MAX] =
 223 {
 224  [ C(L1D) ] = {
 225         [ C(OP_READ) ] = {
 226                 [ C(RESULT_ACCESS) ] = 0xf1d0, /* MEM_UOP_RETIRED.LOADS        */
 227                 [ C(RESULT_MISS)   ] = 0x0151, /* L1D.REPLACEMENT              */
 228         },
 229         [ C(OP_WRITE) ] = {
 230                 [ C(RESULT_ACCESS) ] = 0xf2d0, /* MEM_UOP_RETIRED.STORES       */
 231                 [ C(RESULT_MISS)   ] = 0x0851, /* L1D.ALL_M_REPLACEMENT        */
 232         },
 233         [ C(OP_PREFETCH) ] = {
 234                 [ C(RESULT_ACCESS) ] = 0x0,
 235                 [ C(RESULT_MISS)   ] = 0x024e, /* HW_PRE_REQ.DL1_MISS          */
 236         },
 237  },
 238  [ C(L1I ) ] = {
 239         [ C(OP_READ) ] = {
 240                 [ C(RESULT_ACCESS) ] = 0x0,
 241                 [ C(RESULT_MISS)   ] = 0x0280, /* ICACHE.MISSES */
 242         },
 243         [ C(OP_WRITE) ] = {
 244                 [ C(RESULT_ACCESS) ] = -1,
 245                 [ C(RESULT_MISS)   ] = -1,
 246         },
 247         [ C(OP_PREFETCH) ] = {
 248                 [ C(RESULT_ACCESS) ] = 0x0,
 249                 [ C(RESULT_MISS)   ] = 0x0,
 250         },
 251  },
 252  [ C(LL  ) ] = {
 253         [ C(OP_READ) ] = {
 254                 /* OFFCORE_RESPONSE.ANY_DATA.LOCAL_CACHE */
 255                 [ C(RESULT_ACCESS) ] = 0x01b7,
 256                 /* OFFCORE_RESPONSE.ANY_DATA.ANY_LLC_MISS */
 257                 [ C(RESULT_MISS)   ] = 0x01b7,
 258         },
 259         [ C(OP_WRITE) ] = {
 260                 /* OFFCORE_RESPONSE.ANY_RFO.LOCAL_CACHE */
 261                 [ C(RESULT_ACCESS) ] = 0x01b7,
 262                 /* OFFCORE_RESPONSE.ANY_RFO.ANY_LLC_MISS */
 263                 [ C(RESULT_MISS)   ] = 0x01b7,
 264         },
 265         [ C(OP_PREFETCH) ] = {
 266                 /* OFFCORE_RESPONSE.PREFETCH.LOCAL_CACHE */
 267                 [ C(RESULT_ACCESS) ] = 0x01b7,
 268                 /* OFFCORE_RESPONSE.PREFETCH.ANY_LLC_MISS */
 269                 [ C(RESULT_MISS)   ] = 0x01b7,
 270         },
 271  },
 272  [ C(DTLB) ] = {
 273         [ C(OP_READ) ] = {
 274                 [ C(RESULT_ACCESS) ] = 0x81d0, /* MEM_UOP_RETIRED.ALL_LOADS */
 275                 [ C(RESULT_MISS)   ] = 0x0108, /* DTLB_LOAD_MISSES.CAUSES_A_WALK */
 276         },
 277         [ C(OP_WRITE) ] = {
 278                 [ C(RESULT_ACCESS) ] = 0x82d0, /* MEM_UOP_RETIRED.ALL_STORES */
 279                 [ C(RESULT_MISS)   ] = 0x0149, /* DTLB_STORE_MISSES.MISS_CAUSES_A_WALK */
 280         },
 281         [ C(OP_PREFETCH) ] = {
 282                 [ C(RESULT_ACCESS) ] = 0x0,
 283                 [ C(RESULT_MISS)   ] = 0x0,
 284         },
 285  },
 286  [ C(ITLB) ] = {
 287         [ C(OP_READ) ] = {
 288                 [ C(RESULT_ACCESS) ] = 0x1085, /* ITLB_MISSES.STLB_HIT         */
 289                 [ C(RESULT_MISS)   ] = 0x0185, /* ITLB_MISSES.CAUSES_A_WALK    */
 290         },
 291         [ C(OP_WRITE) ] = {
 292                 [ C(RESULT_ACCESS) ] = -1,
 293                 [ C(RESULT_MISS)   ] = -1,
 294         },
 295         [ C(OP_PREFETCH) ] = {
 296                 [ C(RESULT_ACCESS) ] = -1,
 297                 [ C(RESULT_MISS)   ] = -1,
 298         },
 299  },
 300  [ C(BPU ) ] = {
 301         [ C(OP_READ) ] = {
 302                 [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
 303                 [ C(RESULT_MISS)   ] = 0x00c5, /* BR_MISP_RETIRED.ALL_BRANCHES */
 304         },
 305         [ C(OP_WRITE) ] = {
 306                 [ C(RESULT_ACCESS) ] = -1,
 307                 [ C(RESULT_MISS)   ] = -1,
 308         },
 309         [ C(OP_PREFETCH) ] = {
 310                 [ C(RESULT_ACCESS) ] = -1,
 311                 [ C(RESULT_MISS)   ] = -1,
 312         },
 313  },
 314  [ C(NODE) ] = {
 315         [ C(OP_READ) ] = {
 316                 [ C(RESULT_ACCESS) ] = 0x01b7,
 317                 [ C(RESULT_MISS)   ] = 0x01b7,
 318         },
 319         [ C(OP_WRITE) ] = {
 320                 [ C(RESULT_ACCESS) ] = 0x01b7,
 321                 [ C(RESULT_MISS)   ] = 0x01b7,
 322         },
 323         [ C(OP_PREFETCH) ] = {
 324                 [ C(RESULT_ACCESS) ] = 0x01b7,
 325                 [ C(RESULT_MISS)   ] = 0x01b7,
 326         },
 327  },
 328
 329 };
 330
 331 static __initconst const u64 westmere_hw_cache_event_ids
 332                                 [PERF_COUNT_HW_CACHE_MAX]
 333                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 334                                 [PERF_COUNT_HW_CACHE_RESULT_MAX] =
 335 {
 336  [ C(L1D) ] = {
 337         [ C(OP_READ) ] = {
 338                 [ C(RESULT_ACCESS) ] = 0x010b, /* MEM_INST_RETIRED.LOADS       */
 339                 [ C(RESULT_MISS)   ] = 0x0151, /* L1D.REPL                     */
 340         },
 341         [ C(OP_WRITE) ] = {
 342                 [ C(RESULT_ACCESS) ] = 0x020b, /* MEM_INST_RETURED.STORES      */
 343                 [ C(RESULT_MISS)   ] = 0x0251, /* L1D.M_REPL                   */
 344         },
 345         [ C(OP_PREFETCH) ] = {
 346                 [ C(RESULT_ACCESS) ] = 0x014e, /* L1D_PREFETCH.REQUESTS        */
 347                 [ C(RESULT_MISS)   ] = 0x024e, /* L1D_PREFETCH.MISS            */
 348         },
 349  },
 350  [ C(L1I ) ] = {
 351         [ C(OP_READ) ] = {
 352                 [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS                    */
 353                 [ C(RESULT_MISS)   ] = 0x0280, /* L1I.MISSES                   */
 354         },
 355         [ C(OP_WRITE) ] = {
 356                 [ C(RESULT_ACCESS) ] = -1,
 357                 [ C(RESULT_MISS)   ] = -1,
 358         },
 359         [ C(OP_PREFETCH) ] = {
 360                 [ C(RESULT_ACCESS) ] = 0x0,
 361                 [ C(RESULT_MISS)   ] = 0x0,
 362         },
 363  },
 364  [ C(LL  ) ] = {
 365         [ C(OP_READ) ] = {
 366                 /* OFFCORE_RESPONSE.ANY_DATA.LOCAL_CACHE */
 367                 [ C(RESULT_ACCESS) ] = 0x01b7,
 368                 /* OFFCORE_RESPONSE.ANY_DATA.ANY_LLC_MISS */
 369                 [ C(RESULT_MISS)   ] = 0x01b7,
 370         },
 371         /*
 372          * Use RFO, not WRITEBACK, because a write miss would typically occur
 373          * on RFO.
 374          */
 375         [ C(OP_WRITE) ] = {
 376                 /* OFFCORE_RESPONSE.ANY_RFO.LOCAL_CACHE */
 377                 [ C(RESULT_ACCESS) ] = 0x01b7,
 378                 /* OFFCORE_RESPONSE.ANY_RFO.ANY_LLC_MISS */
 379                 [ C(RESULT_MISS)   ] = 0x01b7,
 380         },
 381         [ C(OP_PREFETCH) ] = {
 382                 /* OFFCORE_RESPONSE.PREFETCH.LOCAL_CACHE */
 383                 [ C(RESULT_ACCESS) ] = 0x01b7,
 384                 /* OFFCORE_RESPONSE.PREFETCH.ANY_LLC_MISS */
 385                 [ C(RESULT_MISS)   ] = 0x01b7,
 386         },
 387  },
 388  [ C(DTLB) ] = {
 389         [ C(OP_READ) ] = {
 390                 [ C(RESULT_ACCESS) ] = 0x010b, /* MEM_INST_RETIRED.LOADS       */
 391                 [ C(RESULT_MISS)   ] = 0x0108, /* DTLB_LOAD_MISSES.ANY         */
 392         },
 393         [ C(OP_WRITE) ] = {
 394                 [ C(RESULT_ACCESS) ] = 0x020b, /* MEM_INST_RETURED.STORES      */
 395                 [ C(RESULT_MISS)   ] = 0x010c, /* MEM_STORE_RETIRED.DTLB_MISS  */
 396         },
 397         [ C(OP_PREFETCH) ] = {
 398                 [ C(RESULT_ACCESS) ] = 0x0,
 399                 [ C(RESULT_MISS)   ] = 0x0,
 400         },
 401  },
 402  [ C(ITLB) ] = {
 403         [ C(OP_READ) ] = {
 404                 [ C(RESULT_ACCESS) ] = 0x01c0, /* INST_RETIRED.ANY_P           */
 405                 [ C(RESULT_MISS)   ] = 0x0185, /* ITLB_MISSES.ANY              */
 406         },
 407         [ C(OP_WRITE) ] = {
 408                 [ C(RESULT_ACCESS) ] = -1,
 409                 [ C(RESULT_MISS)   ] = -1,
 410         },
 411         [ C(OP_PREFETCH) ] = {
 412                 [ C(RESULT_ACCESS) ] = -1,
 413                 [ C(RESULT_MISS)   ] = -1,
 414         },
 415  },
 416  [ C(BPU ) ] = {
 417         [ C(OP_READ) ] = {
 418                 [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
 419                 [ C(RESULT_MISS)   ] = 0x03e8, /* BPU_CLEARS.ANY               */
 420         },
 421         [ C(OP_WRITE) ] = {
 422                 [ C(RESULT_ACCESS) ] = -1,
 423                 [ C(RESULT_MISS)   ] = -1,
 424         },
 425         [ C(OP_PREFETCH) ] = {
 426                 [ C(RESULT_ACCESS) ] = -1,
 427                 [ C(RESULT_MISS)   ] = -1,
 428         },
 429  },
 430  [ C(NODE) ] = {
 431         [ C(OP_READ) ] = {
 432                 [ C(RESULT_ACCESS) ] = 0x01b7,
 433                 [ C(RESULT_MISS)   ] = 0x01b7,
 434         },
 435         [ C(OP_WRITE) ] = {
 436                 [ C(RESULT_ACCESS) ] = 0x01b7,
 437                 [ C(RESULT_MISS)   ] = 0x01b7,
 438         },
 439         [ C(OP_PREFETCH) ] = {
 440                 [ C(RESULT_ACCESS) ] = 0x01b7,
 441                 [ C(RESULT_MISS)   ] = 0x01b7,
 442         },
 443  },
 444 };
 445
 446 /*
 447  * Nehalem/Westmere MSR_OFFCORE_RESPONSE bits;
 448  * See IA32 SDM Vol 3B 30.6.1.3
 449  */
 450
 451 #define NHM_DMND_DATA_RD        (1 << 0)
 452 #define NHM_DMND_RFO            (1 << 1)
 453 #define NHM_DMND_IFETCH         (1 << 2)
 454 #define NHM_DMND_WB             (1 << 3)
 455 #define NHM_PF_DATA_RD          (1 << 4)
 456 #define NHM_PF_DATA_RFO         (1 << 5)
 457 #define NHM_PF_IFETCH           (1 << 6)
 458 #define NHM_OFFCORE_OTHER       (1 << 7)
 459 #define NHM_UNCORE_HIT          (1 << 8)
 460 #define NHM_OTHER_CORE_HIT_SNP  (1 << 9)
 461 #define NHM_OTHER_CORE_HITM     (1 << 10)
 462                                 /* reserved */
 463 #define NHM_REMOTE_CACHE_FWD    (1 << 12)
 464 #define NHM_REMOTE_DRAM         (1 << 13)
 465 #define NHM_LOCAL_DRAM          (1 << 14)
 466 #define NHM_NON_DRAM            (1 << 15)
 467
 468 #define NHM_LOCAL               (NHM_LOCAL_DRAM|NHM_REMOTE_CACHE_FWD)
 469 #define NHM_REMOTE              (NHM_REMOTE_DRAM)
 470
 471 #define NHM_DMND_READ           (NHM_DMND_DATA_RD)
 472 #define NHM_DMND_WRITE          (NHM_DMND_RFO|NHM_DMND_WB)
 473 #define NHM_DMND_PREFETCH       (NHM_PF_DATA_RD|NHM_PF_DATA_RFO)
 474
 475 #define NHM_L3_HIT      (NHM_UNCORE_HIT|NHM_OTHER_CORE_HIT_SNP|NHM_OTHER_CORE_HITM)
 476 #define NHM_L3_MISS     (NHM_NON_DRAM|NHM_LOCAL_DRAM|NHM_REMOTE_DRAM|NHM_REMOTE_CACHE_FWD)
 477 #define NHM_L3_ACCESS   (NHM_L3_HIT|NHM_L3_MISS)
 478
 479 static __initconst const u64 nehalem_hw_cache_extra_regs
 480                                 [PERF_COUNT_HW_CACHE_MAX]
 481                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 482                                 [PERF_COUNT_HW_CACHE_RESULT_MAX] =
 483 {
 484  [ C(LL  ) ] = {
 485         [ C(OP_READ) ] = {
 486                 [ C(RESULT_ACCESS) ] = NHM_DMND_READ|NHM_L3_ACCESS,
 487                 [ C(RESULT_MISS)   ] = NHM_DMND_READ|NHM_L3_MISS,
 488         },
 489         [ C(OP_WRITE) ] = {
 490                 [ C(RESULT_ACCESS) ] = NHM_DMND_WRITE|NHM_L3_ACCESS,
 491                 [ C(RESULT_MISS)   ] = NHM_DMND_WRITE|NHM_L3_MISS,
 492         },
 493         [ C(OP_PREFETCH) ] = {
 494                 [ C(RESULT_ACCESS) ] = NHM_DMND_PREFETCH|NHM_L3_ACCESS,
 495                 [ C(RESULT_MISS)   ] = NHM_DMND_PREFETCH|NHM_L3_MISS,
 496         },
 497  },
 498  [ C(NODE) ] = {
 499         [ C(OP_READ) ] = {
 500                 [ C(RESULT_ACCESS) ] = NHM_DMND_READ|NHM_LOCAL|NHM_REMOTE,
 501                 [ C(RESULT_MISS)   ] = NHM_DMND_READ|NHM_REMOTE,
 502         },
 503         [ C(OP_WRITE) ] = {
 504                 [ C(RESULT_ACCESS) ] = NHM_DMND_WRITE|NHM_LOCAL|NHM_REMOTE,
 505                 [ C(RESULT_MISS)   ] = NHM_DMND_WRITE|NHM_REMOTE,
 506         },
 507         [ C(OP_PREFETCH) ] = {
 508                 [ C(RESULT_ACCESS) ] = NHM_DMND_PREFETCH|NHM_LOCAL|NHM_REMOTE,
 509                 [ C(RESULT_MISS)   ] = NHM_DMND_PREFETCH|NHM_REMOTE,
 510         },
 511  },
 512 };
 513
 514 static __initconst const u64 nehalem_hw_cache_event_ids
 515                                 [PERF_COUNT_HW_CACHE_MAX]
 516                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 517                                 [PERF_COUNT_HW_CACHE_RESULT_MAX] =
 518 {
 519  [ C(L1D) ] = {
 520         [ C(OP_READ) ] = {
 521                 [ C(RESULT_ACCESS) ] = 0x010b, /* MEM_INST_RETIRED.LOADS       */
 522                 [ C(RESULT_MISS)   ] = 0x0151, /* L1D.REPL                     */
 523         },
 524         [ C(OP_WRITE) ] = {
 525                 [ C(RESULT_ACCESS) ] = 0x020b, /* MEM_INST_RETURED.STORES      */
 526                 [ C(RESULT_MISS)   ] = 0x0251, /* L1D.M_REPL                   */
 527         },
 528         [ C(OP_PREFETCH) ] = {
 529                 [ C(RESULT_ACCESS) ] = 0x014e, /* L1D_PREFETCH.REQUESTS        */
 530                 [ C(RESULT_MISS)   ] = 0x024e, /* L1D_PREFETCH.MISS            */
 531         },
 532  },
 533  [ C(L1I ) ] = {
 534         [ C(OP_READ) ] = {
 535                 [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS                    */
 536                 [ C(RESULT_MISS)   ] = 0x0280, /* L1I.MISSES                   */
 537         },
 538         [ C(OP_WRITE) ] = {
 539                 [ C(RESULT_ACCESS) ] = -1,
 540                 [ C(RESULT_MISS)   ] = -1,
 541         },
 542         [ C(OP_PREFETCH) ] = {
 543                 [ C(RESULT_ACCESS) ] = 0x0,
 544                 [ C(RESULT_MISS)   ] = 0x0,
 545         },
 546  },
 547  [ C(LL  ) ] = {
 548         [ C(OP_READ) ] = {
 549                 /* OFFCORE_RESPONSE.ANY_DATA.LOCAL_CACHE */
 550                 [ C(RESULT_ACCESS) ] = 0x01b7,
 551                 /* OFFCORE_RESPONSE.ANY_DATA.ANY_LLC_MISS */
 552                 [ C(RESULT_MISS)   ] = 0x01b7,
 553         },
 554         /*
 555          * Use RFO, not WRITEBACK, because a write miss would typically occur
 556          * on RFO.
 557          */
 558         [ C(OP_WRITE) ] = {
 559                 /* OFFCORE_RESPONSE.ANY_RFO.LOCAL_CACHE */
 560                 [ C(RESULT_ACCESS) ] = 0x01b7,
 561                 /* OFFCORE_RESPONSE.ANY_RFO.ANY_LLC_MISS */
 562                 [ C(RESULT_MISS)   ] = 0x01b7,
 563         },
 564         [ C(OP_PREFETCH) ] = {
 565                 /* OFFCORE_RESPONSE.PREFETCH.LOCAL_CACHE */
 566                 [ C(RESULT_ACCESS) ] = 0x01b7,
 567                 /* OFFCORE_RESPONSE.PREFETCH.ANY_LLC_MISS */
 568                 [ C(RESULT_MISS)   ] = 0x01b7,
 569         },
 570  },
 571  [ C(DTLB) ] = {
 572         [ C(OP_READ) ] = {
 573                 [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI   (alias)  */
 574                 [ C(RESULT_MISS)   ] = 0x0108, /* DTLB_LOAD_MISSES.ANY         */
 575         },
 576         [ C(OP_WRITE) ] = {
 577                 [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI   (alias)  */
 578                 [ C(RESULT_MISS)   ] = 0x010c, /* MEM_STORE_RETIRED.DTLB_MISS  */
 579         },
 580         [ C(OP_PREFETCH) ] = {
 581                 [ C(RESULT_ACCESS) ] = 0x0,
 582                 [ C(RESULT_MISS)   ] = 0x0,
 583         },
 584  },
 585  [ C(ITLB) ] = {
 586         [ C(OP_READ) ] = {
 587                 [ C(RESULT_ACCESS) ] = 0x01c0, /* INST_RETIRED.ANY_P           */
 588                 [ C(RESULT_MISS)   ] = 0x20c8, /* ITLB_MISS_RETIRED            */
 589         },
 590         [ C(OP_WRITE) ] = {
 591                 [ C(RESULT_ACCESS) ] = -1,
 592                 [ C(RESULT_MISS)   ] = -1,
 593         },
 594         [ C(OP_PREFETCH) ] = {
 595                 [ C(RESULT_ACCESS) ] = -1,
 596                 [ C(RESULT_MISS)   ] = -1,
 597         },
 598  },
 599  [ C(BPU ) ] = {
 600         [ C(OP_READ) ] = {
 601                 [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
 602                 [ C(RESULT_MISS)   ] = 0x03e8, /* BPU_CLEARS.ANY               */
 603         },
 604         [ C(OP_WRITE) ] = {
 605                 [ C(RESULT_ACCESS) ] = -1,
 606                 [ C(RESULT_MISS)   ] = -1,
 607         },
 608         [ C(OP_PREFETCH) ] = {
 609                 [ C(RESULT_ACCESS) ] = -1,
 610                 [ C(RESULT_MISS)   ] = -1,
 611         },
 612  },
 613  [ C(NODE) ] = {
 614         [ C(OP_READ) ] = {
 615                 [ C(RESULT_ACCESS) ] = 0x01b7,
 616                 [ C(RESULT_MISS)   ] = 0x01b7,
 617         },
 618         [ C(OP_WRITE) ] = {
 619                 [ C(RESULT_ACCESS) ] = 0x01b7,
 620                 [ C(RESULT_MISS)   ] = 0x01b7,
 621         },
 622         [ C(OP_PREFETCH) ] = {
 623                 [ C(RESULT_ACCESS) ] = 0x01b7,
 624                 [ C(RESULT_MISS)   ] = 0x01b7,
 625         },
 626  },
 627 };
 628
 629 static __initconst const u64 core2_hw_cache_event_ids
 630                                 [PERF_COUNT_HW_CACHE_MAX]
 631                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 632                                 [PERF_COUNT_HW_CACHE_RESULT_MAX] =
 633 {
 634  [ C(L1D) ] = {
 635         [ C(OP_READ) ] = {
 636                 [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI          */
 637                 [ C(RESULT_MISS)   ] = 0x0140, /* L1D_CACHE_LD.I_STATE       */
 638         },
 639         [ C(OP_WRITE) ] = {
 640                 [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI          */
 641                 [ C(RESULT_MISS)   ] = 0x0141, /* L1D_CACHE_ST.I_STATE       */
 642         },
 643         [ C(OP_PREFETCH) ] = {
 644                 [ C(RESULT_ACCESS) ] = 0x104e, /* L1D_PREFETCH.REQUESTS      */
 645                 [ C(RESULT_MISS)   ] = 0,
 646         },
 647  },
 648  [ C(L1I ) ] = {
 649         [ C(OP_READ) ] = {
 650                 [ C(RESULT_ACCESS) ] = 0x0080, /* L1I.READS                  */
 651                 [ C(RESULT_MISS)   ] = 0x0081, /* L1I.MISSES                 */
 652         },
 653         [ C(OP_WRITE) ] = {
 654                 [ C(RESULT_ACCESS) ] = -1,
 655                 [ C(RESULT_MISS)   ] = -1,
 656         },
 657         [ C(OP_PREFETCH) ] = {
 658                 [ C(RESULT_ACCESS) ] = 0,
 659                 [ C(RESULT_MISS)   ] = 0,
 660         },
 661  },
 662  [ C(LL  ) ] = {
 663         [ C(OP_READ) ] = {
 664                 [ C(RESULT_ACCESS) ] = 0x4f29, /* L2_LD.MESI                 */
 665                 [ C(RESULT_MISS)   ] = 0x4129, /* L2_LD.ISTATE               */
 666         },
 667         [ C(OP_WRITE) ] = {
 668                 [ C(RESULT_ACCESS) ] = 0x4f2A, /* L2_ST.MESI                 */
 669                 [ C(RESULT_MISS)   ] = 0x412A, /* L2_ST.ISTATE               */
 670         },
 671         [ C(OP_PREFETCH) ] = {
 672                 [ C(RESULT_ACCESS) ] = 0,
 673                 [ C(RESULT_MISS)   ] = 0,
 674         },
 675  },
 676  [ C(DTLB) ] = {
 677         [ C(OP_READ) ] = {
 678                 [ C(RESULT_ACCESS) ] = 0x0f40, /* L1D_CACHE_LD.MESI  (alias) */
 679                 [ C(RESULT_MISS)   ] = 0x0208, /* DTLB_MISSES.MISS_LD        */
 680         },
 681         [ C(OP_WRITE) ] = {
 682                 [ C(RESULT_ACCESS) ] = 0x0f41, /* L1D_CACHE_ST.MESI  (alias) */
 683                 [ C(RESULT_MISS)   ] = 0x0808, /* DTLB_MISSES.MISS_ST        */
 684         },
 685         [ C(OP_PREFETCH) ] = {
 686                 [ C(RESULT_ACCESS) ] = 0,
 687                 [ C(RESULT_MISS)   ] = 0,
 688         },
 689  },
 690  [ C(ITLB) ] = {
 691         [ C(OP_READ) ] = {
 692                 [ C(RESULT_ACCESS) ] = 0x00c0, /* INST_RETIRED.ANY_P         */
 693                 [ C(RESULT_MISS)   ] = 0x1282, /* ITLBMISSES                 */
 694         },
 695         [ C(OP_WRITE) ] = {
 696                 [ C(RESULT_ACCESS) ] = -1,
 697                 [ C(RESULT_MISS)   ] = -1,
 698         },
 699         [ C(OP_PREFETCH) ] = {
 700                 [ C(RESULT_ACCESS) ] = -1,
 701                 [ C(RESULT_MISS)   ] = -1,
 702         },
 703  },
 704  [ C(BPU ) ] = {
 705         [ C(OP_READ) ] = {
 706                 [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ANY        */
 707                 [ C(RESULT_MISS)   ] = 0x00c5, /* BP_INST_RETIRED.MISPRED    */
 708         },
 709         [ C(OP_WRITE) ] = {
 710                 [ C(RESULT_ACCESS) ] = -1,
 711                 [ C(RESULT_MISS)   ] = -1,
 712         },
 713         [ C(OP_PREFETCH) ] = {
 714                 [ C(RESULT_ACCESS) ] = -1,
 715                 [ C(RESULT_MISS)   ] = -1,
 716         },
 717  },
 718 };
 719
 720 static __initconst const u64 atom_hw_cache_event_ids
 721                                 [PERF_COUNT_HW_CACHE_MAX]
 722                                 [PERF_COUNT_HW_CACHE_OP_MAX]
 723                                 [PERF_COUNT_HW_CACHE_RESULT_MAX] =
 724 {
 725  [ C(L1D) ] = {
 726         [ C(OP_READ) ] = {
 727                 [ C(RESULT_ACCESS) ] = 0x2140, /* L1D_CACHE.LD               */
 728                 [ C(RESULT_MISS)   ] = 0,
 729         },
 730         [ C(OP_WRITE) ] = {
 731                 [ C(RESULT_ACCESS) ] = 0x2240, /* L1D_CACHE.ST               */
 732                 [ C(RESULT_MISS)   ] = 0,
 733         },
 734         [ C(OP_PREFETCH) ] = {
 735                 [ C(RESULT_ACCESS) ] = 0x0,
 736                 [ C(RESULT_MISS)   ] = 0,
 737         },
 738  },
 739  [ C(L1I ) ] = {
 740         [ C(OP_READ) ] = {
 741                 [ C(RESULT_ACCESS) ] = 0x0380, /* L1I.READS                  */
 742                 [ C(RESULT_MISS)   ] = 0x0280, /* L1I.MISSES                 */
 743         },
 744         [ C(OP_WRITE) ] = {
 745                 [ C(RESULT_ACCESS) ] = -1,
 746                 [ C(RESULT_MISS)   ] = -1,
 747         },
 748         [ C(OP_PREFETCH) ] = {
 749                 [ C(RESULT_ACCESS) ] = 0,
 750                 [ C(RESULT_MISS)   ] = 0,
 751         },
 752  },
 753  [ C(LL  ) ] = {
 754         [ C(OP_READ) ] = {
 755                 [ C(RESULT_ACCESS) ] = 0x4f29, /* L2_LD.MESI                 */
 756                 [ C(RESULT_MISS)   ] = 0x4129, /* L2_LD.ISTATE               */
 757         },
 758         [ C(OP_WRITE) ] = {
 759                 [ C(RESULT_ACCESS) ] = 0x4f2A, /* L2_ST.MESI                 */
 760                 [ C(RESULT_MISS)   ] = 0x412A, /* L2_ST.ISTATE               */
 761         },
 762         [ C(OP_PREFETCH) ] = {
 763                 [ C(RESULT_ACCESS) ] = 0,
 764                 [ C(RESULT_MISS)   ] = 0,
 765         },
 766  },
 767  [ C(DTLB) ] = {
 768         [ C(OP_READ) ] = {
 769                 [ C(RESULT_ACCESS) ] = 0x2140, /* L1D_CACHE_LD.MESI  (alias) */
 770                 [ C(RESULT_MISS)   ] = 0x0508, /* DTLB_MISSES.MISS_LD        */
 771         },
 772         [ C(OP_WRITE) ] = {
 773                 [ C(RESULT_ACCESS) ] = 0x2240, /* L1D_CACHE_ST.MESI  (alias) */
 774                 [ C(RESULT_MISS)   ] = 0x0608, /* DTLB_MISSES.MISS_ST        */
 775         },
 776         [ C(OP_PREFETCH) ] = {
 777                 [ C(RESULT_ACCESS) ] = 0,
 778                 [ C(RESULT_MISS)   ] = 0,
 779         },
 780  },
 781  [ C(ITLB) ] = {
 782         [ C(OP_READ) ] = {
 783                 [ C(RESULT_ACCESS) ] = 0x00c0, /* INST_RETIRED.ANY_P         */
 784                 [ C(RESULT_MISS)   ] = 0x0282, /* ITLB.MISSES                */
 785         },
 786         [ C(OP_WRITE) ] = {
 787                 [ C(RESULT_ACCESS) ] = -1,
 788                 [ C(RESULT_MISS)   ] = -1,
 789         },
 790         [ C(OP_PREFETCH) ] = {
 791                 [ C(RESULT_ACCESS) ] = -1,
 792                 [ C(RESULT_MISS)   ] = -1,
 793         },
 794  },
 795  [ C(BPU ) ] = {
 796         [ C(OP_READ) ] = {
 797                 [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ANY        */
 798                 [ C(RESULT_MISS)   ] = 0x00c5, /* BP_INST_RETIRED.MISPRED    */
 799         },
 800         [ C(OP_WRITE) ] = {
 801                 [ C(RESULT_ACCESS) ] = -1,
 802                 [ C(RESULT_MISS)   ] = -1,
 803         },
 804         [ C(OP_PREFETCH) ] = {
 805                 [ C(RESULT_ACCESS) ] = -1,
 806                 [ C(RESULT_MISS)   ] = -1,
 807         },
 808  },
 809 };
 810
 811 static inline bool intel_pmu_needs_lbr_smpl(struct perf_event *event)
 812 {
 813         /* user explicitly requested branch sampling */
 814         if (has_branch_stack(event))
 815                 return true;
 816
 817         /* implicit branch sampling to correct PEBS skid */
 818         if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1)
 819                 return true;
 820
 821         return false;
 822 }
 823
 824 static void intel_pmu_disable_all(void)
 825 {
 826         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 827
 828         wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
 829
 830         if (test_bit(INTEL_PMC_IDX_FIXED_BTS, cpuc->active_mask))
 831                 intel_pmu_disable_bts();
 832
 833         intel_pmu_pebs_disable_all();
 834         intel_pmu_lbr_disable_all();
 835 }
 836
 837 static void intel_pmu_enable_all(int added)
 838 {
 839         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 840
 841         intel_pmu_pebs_enable_all();
 842         intel_pmu_lbr_enable_all();
 843         wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL,
 844                         x86_pmu.intel_ctrl & ~cpuc->intel_ctrl_guest_mask);
 845
 846         if (test_bit(INTEL_PMC_IDX_FIXED_BTS, cpuc->active_mask)) {
 847                 struct perf_event *event =
 848                         cpuc->events[INTEL_PMC_IDX_FIXED_BTS];
 849
 850                 if (WARN_ON_ONCE(!event))
 851                         return;
 852
 853                 intel_pmu_enable_bts(event->hw.config);
 854         }
 855 }
 856
 857 /*
 858  * Workaround for:
 859  *   Intel Errata AAK100 (model 26)
 860  *   Intel Errata AAP53  (model 30)
 861  *   Intel Errata BD53   (model 44)
 862  *
 863  * The official story:
 864  *   These chips need to be 'reset' when adding counters by programming the
 865  *   magic three (non-counting) events 0x4300B5, 0x4300D2, and 0x4300B1 either
 866  *   in sequence on the same PMC or on different PMCs.
 867  *
 868  * In practise it appears some of these events do in fact count, and
 869  * we need to programm all 4 events.
 870  */
 871 static void intel_pmu_nhm_workaround(void)
 872 {
 873         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 874         static const unsigned long nhm_magic[4] = {
 875                 0x4300B5,
 876                 0x4300D2,
 877                 0x4300B1,
 878                 0x4300B1
 879         };
 880         struct perf_event *event;
 881         int i;
 882
 883         /*
 884          * The Errata requires below steps:
 885          * 1) Clear MSR_IA32_PEBS_ENABLE and MSR_CORE_PERF_GLOBAL_CTRL;
 886          * 2) Configure 4 PERFEVTSELx with the magic events and clear
 887          *    the corresponding PMCx;
 888          * 3) set bit0~bit3 of MSR_CORE_PERF_GLOBAL_CTRL;
 889          * 4) Clear MSR_CORE_PERF_GLOBAL_CTRL;
 890          * 5) Clear 4 pairs of ERFEVTSELx and PMCx;
 891          */
 892
 893         /*
 894          * The real steps we choose are a little different from above.
 895          * A) To reduce MSR operations, we don't run step 1) as they
 896          *    are already cleared before this function is called;
 897          * B) Call x86_perf_event_update to save PMCx before configuring
 898          *    PERFEVTSELx with magic number;
 899          * C) With step 5), we do clear only when the PERFEVTSELx is
 900          *    not used currently.
 901          * D) Call x86_perf_event_set_period to restore PMCx;
 902          */
 903
 904         /* We always operate 4 pairs of PERF Counters */
 905         for (i = 0; i < 4; i++) {
 906                 event = cpuc->events[i];
 907                 if (event)
 908                         x86_perf_event_update(event);
 909         }
 910
 911         for (i = 0; i < 4; i++) {
 912                 wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + i, nhm_magic[i]);
 913                 wrmsrl(MSR_ARCH_PERFMON_PERFCTR0 + i, 0x0);
 914         }
 915
 916         wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0xf);
 917         wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0x0);
 918
 919         for (i = 0; i < 4; i++) {
 920                 event = cpuc->events[i];
 921
 922                 if (event) {
 923                         x86_perf_event_set_period(event);
 924                         __x86_pmu_enable_event(&event->hw,
 925                                         ARCH_PERFMON_EVENTSEL_ENABLE);
 926                 } else
 927                         wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + i, 0x0);
 928         }
 929 }
 930
 931 static void intel_pmu_nhm_enable_all(int added)
 932 {
 933         if (added)
 934                 intel_pmu_nhm_workaround();
 935         intel_pmu_enable_all(added);
 936 }
 937
 938 static inline u64 intel_pmu_get_status(void)
 939 {
 940         u64 status;
 941
 942         rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status);
 943
 944         return status;
 945 }
 946
 947 static inline void intel_pmu_ack_status(u64 ack)
 948 {
 949         wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, ack);
 950 }
 951
 952 static void intel_pmu_disable_fixed(struct hw_perf_event *hwc)
 953 {
 954         int idx = hwc->idx - INTEL_PMC_IDX_FIXED;
 955         u64 ctrl_val, mask;
 956
 957         mask = 0xfULL << (idx * 4);
 958
 959         rdmsrl(hwc->config_base, ctrl_val);
 960         ctrl_val &= ~mask;
 961         wrmsrl(hwc->config_base, ctrl_val);
 962 }
 963
 964 static void intel_pmu_disable_event(struct perf_event *event)
 965 {
 966         struct hw_perf_event *hwc = &event->hw;
 967         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 968
 969         if (unlikely(hwc->idx == INTEL_PMC_IDX_FIXED_BTS)) {
 970                 intel_pmu_disable_bts();
 971                 intel_pmu_drain_bts_buffer();
 972                 return;
 973         }
 974
 975         cpuc->intel_ctrl_guest_mask &= ~(1ull << hwc->idx);
 976         cpuc->intel_ctrl_host_mask &= ~(1ull << hwc->idx);
 977
 978         /*
 979          * must disable before any actual event
 980          * because any event may be combined with LBR
 981          */
 982         if (intel_pmu_needs_lbr_smpl(event))
 983                 intel_pmu_lbr_disable(event);
 984
 985         if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
 986                 intel_pmu_disable_fixed(hwc);
 987                 return;
 988         }
 989
 990         x86_pmu_disable_event(event);
 991
 992         if (unlikely(event->attr.precise_ip))
 993                 intel_pmu_pebs_disable(event);
 994 }
 995
 996 static void intel_pmu_enable_fixed(struct hw_perf_event *hwc)
 997 {
 998         int idx = hwc->idx - INTEL_PMC_IDX_FIXED;
 999         u64 ctrl_val, bits, mask;
1000
1001         /*
1002          * Enable IRQ generation (0x8),
1003          * and enable ring-3 counting (0x2) and ring-0 counting (0x1)
1004          * if requested:
1005          */
1006         bits = 0x8ULL;
1007         if (hwc->config & ARCH_PERFMON_EVENTSEL_USR)
1008                 bits |= 0x2;
1009         if (hwc->config & ARCH_PERFMON_EVENTSEL_OS)
1010                 bits |= 0x1;
1011
1012         /*
1013          * ANY bit is supported in v3 and up
1014          */
1015         if (x86_pmu.version > 2 && hwc->config & ARCH_PERFMON_EVENTSEL_ANY)
1016                 bits |= 0x4;
1017
1018         bits <<= (idx * 4);
1019         mask = 0xfULL << (idx * 4);
1020
1021         rdmsrl(hwc->config_base, ctrl_val);
1022         ctrl_val &= ~mask;
1023         ctrl_val |= bits;
1024         wrmsrl(hwc->config_base, ctrl_val);
1025 }
1026
1027 static void intel_pmu_enable_event(struct perf_event *event)
1028 {
1029         struct hw_perf_event *hwc = &event->hw;
1030         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
1031
1032         if (unlikely(hwc->idx == INTEL_PMC_IDX_FIXED_BTS)) {
1033                 if (!__this_cpu_read(cpu_hw_events.enabled))
1034                         return;
1035
1036                 intel_pmu_enable_bts(hwc->config);
1037                 return;
1038         }
1039         /*
1040          * must enabled before any actual event
1041          * because any event may be combined with LBR
1042          */
1043         if (intel_pmu_needs_lbr_smpl(event))
1044                 intel_pmu_lbr_enable(event);
1045
1046         if (event->attr.exclude_host)
1047                 cpuc->intel_ctrl_guest_mask |= (1ull << hwc->idx);
1048         if (event->attr.exclude_guest)
1049                 cpuc->intel_ctrl_host_mask |= (1ull << hwc->idx);
1050
1051         if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
1052                 intel_pmu_enable_fixed(hwc);
1053                 return;
1054         }
1055
1056         if (unlikely(event->attr.precise_ip))
1057                 intel_pmu_pebs_enable(event);
1058
1059         __x86_pmu_enable_event(hwc, ARCH_PERFMON_EVENTSEL_ENABLE);
1060 }
1061
1062 /*
1063  * Save and restart an expired event. Called by NMI contexts,
1064  * so it has to be careful about preempting normal event ops:
1065  */
1066 int intel_pmu_save_and_restart(struct perf_event *event)
1067 {
1068         x86_perf_event_update(event);
1069         return x86_perf_event_set_period(event);
1070 }
1071
1072 static void intel_pmu_reset(void)
1073 {
1074         struct debug_store *ds = __this_cpu_read(cpu_hw_events.ds);
1075         unsigned long flags;
1076         int idx;
1077
1078         if (!x86_pmu.num_counters)
1079                 return;
1080
1081         local_irq_save(flags);
1082
1083         pr_info("clearing PMU state on CPU#%d\n", smp_processor_id());
1084
1085         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
1086                 wrmsrl_safe(x86_pmu_config_addr(idx), 0ull);
1087                 wrmsrl_safe(x86_pmu_event_addr(idx),  0ull);
1088         }
1089         for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++)
1090                 wrmsrl_safe(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, 0ull);
1091
1092         if (ds)
1093                 ds->bts_index = ds->bts_buffer_base;
1094
1095         local_irq_restore(flags);
1096 }
1097
1098 /*
1099  * This handler is triggered by the local APIC, so the APIC IRQ handling
1100  * rules apply:
1101  */
1102 static int intel_pmu_handle_irq(struct pt_regs *regs)
1103 {
1104         struct perf_sample_data data;
1105         struct cpu_hw_events *cpuc;
1106         int bit, loops;
1107         u64 status;
1108         int handled;
1109
1110         cpuc = &__get_cpu_var(cpu_hw_events);
1111
1112         /*
1113          * Some chipsets need to unmask the LVTPC in a particular spot
1114          * inside the nmi handler.  As a result, the unmasking was pushed
1115          * into all the nmi handlers.
1116          *
1117          * This handler doesn't seem to have any issues with the unmasking
1118          * so it was left at the top.
1119          */
1120         apic_write(APIC_LVTPC, APIC_DM_NMI);
1121
1122         intel_pmu_disable_all();
1123         handled = intel_pmu_drain_bts_buffer();
1124         status = intel_pmu_get_status();
1125         if (!status) {
1126                 intel_pmu_enable_all(0);
1127                 return handled;
1128         }
1129
1130         loops = 0;
1131 again:
1132         intel_pmu_ack_status(status);
1133         if (++loops > 100) {
1134                 WARN_ONCE(1, "perfevents: irq loop stuck!\n");
1135                 perf_event_print_debug();
1136                 intel_pmu_reset();
1137                 goto done;
1138         }
1139
1140         inc_irq_stat(apic_perf_irqs);
1141
1142         intel_pmu_lbr_read();
1143
1144         /*
1145          * PEBS overflow sets bit 62 in the global status register
1146          */
1147         if (__test_and_clear_bit(62, (unsigned long *)&status)) {
1148                 handled++;
1149                 x86_pmu.drain_pebs(regs);
1150         }
1151
1152         for_each_set_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) {
1153                 struct perf_event *event = cpuc->events[bit];
1154
1155                 handled++;
1156
1157                 if (!test_bit(bit, cpuc->active_mask))
1158                         continue;
1159
1160                 if (!intel_pmu_save_and_restart(event))
1161                         continue;
1162
1163                 perf_sample_data_init(&data, 0, event->hw.last_period);
1164
1165                 if (has_branch_stack(event))
1166                         data.br_stack = &cpuc->lbr_stack;
1167
1168                 if (perf_event_overflow(event, &data, regs))
1169                         x86_pmu_stop(event, 0);
1170         }
1171
1172         /*
1173          * Repeat if there is more work to be done:
1174          */
1175         status = intel_pmu_get_status();
1176         if (status)
1177                 goto again;
1178
1179 done:
1180         intel_pmu_enable_all(0);
1181         return handled;
1182 }
1183
1184 static struct event_constraint *
1185 intel_bts_constraints(struct perf_event *event)
1186 {
1187         struct hw_perf_event *hwc = &event->hw;
1188         unsigned int hw_event, bts_event;
1189
1190         if (event->attr.freq)
1191                 return NULL;
1192
1193         hw_event = hwc->config & INTEL_ARCH_EVENT_MASK;
1194         bts_event = x86_pmu.event_map(PERF_COUNT_HW_BRANCH_INSTRUCTIONS);
1195
1196         if (unlikely(hw_event == bts_event && hwc->sample_period == 1))
1197                 return &bts_constraint;
1198
1199         return NULL;
1200 }
1201
1202 static int intel_alt_er(int idx)
1203 {
1204         if (!(x86_pmu.er_flags & ERF_HAS_RSP_1))
1205                 return idx;
1206
1207         if (idx == EXTRA_REG_RSP_0)
1208                 return EXTRA_REG_RSP_1;
1209
1210         if (idx == EXTRA_REG_RSP_1)
1211                 return EXTRA_REG_RSP_0;
1212
1213         return idx;
1214 }
1215
1216 static void intel_fixup_er(struct perf_event *event, int idx)
1217 {
1218         event->hw.extra_reg.idx = idx;
1219
1220         if (idx == EXTRA_REG_RSP_0) {
1221                 event->hw.config &= ~INTEL_ARCH_EVENT_MASK;
1222                 event->hw.config |= 0x01b7;
1223                 event->hw.extra_reg.reg = MSR_OFFCORE_RSP_0;
1224         } else if (idx == EXTRA_REG_RSP_1) {
1225                 event->hw.config &= ~INTEL_ARCH_EVENT_MASK;
1226                 event->hw.config |= 0x01bb;
1227                 event->hw.extra_reg.reg = MSR_OFFCORE_RSP_1;
1228         }
1229 }
1230
1231 /*
1232  * manage allocation of shared extra msr for certain events
1233  *
1234  * sharing can be:
1235  * per-cpu: to be shared between the various events on a single PMU
1236  * per-core: per-cpu + shared by HT threads
1237  */
1238 static struct event_constraint *
1239 __intel_shared_reg_get_constraints(struct cpu_hw_events *cpuc,
1240                                    struct perf_event *event,
1241                                    struct hw_perf_event_extra *reg)
1242 {
1243         struct event_constraint *c = &emptyconstraint;
1244         struct er_account *era;
1245         unsigned long flags;
1246         int idx = reg->idx;
1247
1248         /*
1249          * reg->alloc can be set due to existing state, so for fake cpuc we
1250          * need to ignore this, otherwise we might fail to allocate proper fake
1251          * state for this extra reg constraint. Also see the comment below.
1252          */
1253         if (reg->alloc && !cpuc->is_fake)
1254                 return NULL; /* call x86_get_event_constraint() */
1255
1256 again:
1257         era = &cpuc->shared_regs->regs[idx];
1258         /*
1259          * we use spin_lock_irqsave() to avoid lockdep issues when
1260          * passing a fake cpuc
1261          */
1262         raw_spin_lock_irqsave(&era->lock, flags);
1263
1264         if (!atomic_read(&era->ref) || era->config == reg->config) {
1265
1266                 /*
1267                  * If its a fake cpuc -- as per validate_{group,event}() we
1268                  * shouldn't touch event state and we can avoid doing so
1269                  * since both will only call get_event_constraints() once
1270                  * on each event, this avoids the need for reg->alloc.
1271                  *
1272                  * Not doing the ER fixup will only result in era->reg being
1273                  * wrong, but since we won't actually try and program hardware
1274                  * this isn't a problem either.
1275                  */
1276                 if (!cpuc->is_fake) {
1277                         if (idx != reg->idx)
1278                                 intel_fixup_er(event, idx);
1279
1280                         /*
1281                          * x86_schedule_events() can call get_event_constraints()
1282                          * multiple times on events in the case of incremental
1283                          * scheduling(). reg->alloc ensures we only do the ER
1284                          * allocation once.
1285                          */
1286                         reg->alloc = 1;
1287                 }
1288
1289                 /* lock in msr value */
1290                 era->config = reg->config;
1291                 era->reg = reg->reg;
1292
1293                 /* one more user */
1294                 atomic_inc(&era->ref);
1295
1296                 /*
1297                  * need to call x86_get_event_constraint()
1298                  * to check if associated event has constraints
1299                  */
1300                 c = NULL;
1301         } else {
1302                 idx = intel_alt_er(idx);
1303                 if (idx != reg->idx) {
1304                         raw_spin_unlock_irqrestore(&era->lock, flags);
1305                         goto again;
1306                 }
1307         }
1308         raw_spin_unlock_irqrestore(&era->lock, flags);
1309
1310         return c;
1311 }
1312
1313 static void
1314 __intel_shared_reg_put_constraints(struct cpu_hw_events *cpuc,
1315                                    struct hw_perf_event_extra *reg)
1316 {
1317         struct er_account *era;
1318
1319         /*
1320          * Only put constraint if extra reg was actually allocated. Also takes
1321          * care of event which do not use an extra shared reg.
1322          *
1323          * Also, if this is a fake cpuc we shouldn't touch any event state
1324          * (reg->alloc) and we don't care about leaving inconsistent cpuc state
1325          * either since it'll be thrown out.
1326          */
1327         if (!reg->alloc || cpuc->is_fake)
1328                 return;
1329
1330         era = &cpuc->shared_regs->regs[reg->idx];
1331
1332         /* one fewer user */
1333         atomic_dec(&era->ref);
1334
1335         /* allocate again next time */
1336         reg->alloc = 0;
1337 }
1338
1339 static struct event_constraint *
1340 intel_shared_regs_constraints(struct cpu_hw_events *cpuc,
1341                               struct perf_event *event)
1342 {
1343         struct event_constraint *c = NULL, *d;
1344         struct hw_perf_event_extra *xreg, *breg;
1345
1346         xreg = &event->hw.extra_reg;
1347         if (xreg->idx != EXTRA_REG_NONE) {
1348                 c = __intel_shared_reg_get_constraints(cpuc, event, xreg);
1349                 if (c == &emptyconstraint)
1350                         return c;
1351         }
1352         breg = &event->hw.branch_reg;
1353         if (breg->idx != EXTRA_REG_NONE) {
1354                 d = __intel_shared_reg_get_constraints(cpuc, event, breg);
1355                 if (d == &emptyconstraint) {
1356                         __intel_shared_reg_put_constraints(cpuc, xreg);
1357                         c = d;
1358                 }
1359         }
1360         return c;
1361 }
1362
1363 struct event_constraint *
1364 x86_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
1365 {
1366         struct event_constraint *c;
1367
1368         if (x86_pmu.event_constraints) {
1369                 for_each_event_constraint(c, x86_pmu.event_constraints) {
1370                         if ((event->hw.config & c->cmask) == c->code)
1371                                 return c;
1372                 }
1373         }
1374
1375         return &unconstrained;
1376 }
1377
1378 static struct event_constraint *
1379 intel_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
1380 {
1381         struct event_constraint *c;
1382
1383         c = intel_bts_constraints(event);
1384         if (c)
1385                 return c;
1386
1387         c = intel_pebs_constraints(event);
1388         if (c)
1389                 return c;
1390
1391         c = intel_shared_regs_constraints(cpuc, event);
1392         if (c)
1393                 return c;
1394
1395         return x86_get_event_constraints(cpuc, event);
1396 }
1397
1398 static void
1399 intel_put_shared_regs_event_constraints(struct cpu_hw_events *cpuc,
1400                                         struct perf_event *event)
1401 {
1402         struct hw_perf_event_extra *reg;
1403
1404         reg = &event->hw.extra_reg;
1405         if (reg->idx != EXTRA_REG_NONE)
1406                 __intel_shared_reg_put_constraints(cpuc, reg);
1407
1408         reg = &event->hw.branch_reg;
1409         if (reg->idx != EXTRA_REG_NONE)
1410                 __intel_shared_reg_put_constraints(cpuc, reg);
1411 }
1412
1413 static void intel_put_event_constraints(struct cpu_hw_events *cpuc,
1414                                         struct perf_event *event)
1415 {
1416         intel_put_shared_regs_event_constraints(cpuc, event);
1417 }
1418
1419 static void intel_pebs_aliases_core2(struct perf_event *event)
1420 {
1421         if ((event->hw.config & X86_RAW_EVENT_MASK) == 0x003c) {
1422                 /*
1423                  * Use an alternative encoding for CPU_CLK_UNHALTED.THREAD_P
1424                  * (0x003c) so that we can use it with PEBS.
1425                  *
1426                  * The regular CPU_CLK_UNHALTED.THREAD_P event (0x003c) isn't
1427                  * PEBS capable. However we can use INST_RETIRED.ANY_P
1428                  * (0x00c0), which is a PEBS capable event, to get the same
1429                  * count.
1430                  *
1431                  * INST_RETIRED.ANY_P counts the number of cycles that retires
1432                  * CNTMASK instructions. By setting CNTMASK to a value (16)
1433                  * larger than the maximum number of instructions that can be
1434                  * retired per cycle (4) and then inverting the condition, we
1435                  * count all cycles that retire 16 or less instructions, which
1436                  * is every cycle.
1437                  *
1438                  * Thereby we gain a PEBS capable cycle counter.
1439                  */
1440                 u64 alt_config = X86_CONFIG(.event=0xc0, .inv=1, .cmask=16);
1441
1442                 alt_config |= (event->hw.config & ~X86_RAW_EVENT_MASK);
1443                 event->hw.config = alt_config;
1444         }
1445 }
1446
1447 static void intel_pebs_aliases_snb(struct perf_event *event)
1448 {
1449         if ((event->hw.config & X86_RAW_EVENT_MASK) == 0x003c) {
1450                 /*
1451                  * Use an alternative encoding for CPU_CLK_UNHALTED.THREAD_P
1452                  * (0x003c) so that we can use it with PEBS.
1453                  *
1454                  * The regular CPU_CLK_UNHALTED.THREAD_P event (0x003c) isn't
1455                  * PEBS capable. However we can use UOPS_RETIRED.ALL
1456                  * (0x01c2), which is a PEBS capable event, to get the same
1457                  * count.
1458                  *
1459                  * UOPS_RETIRED.ALL counts the number of cycles that retires
1460                  * CNTMASK micro-ops. By setting CNTMASK to a value (16)
1461                  * larger than the maximum number of micro-ops that can be
1462                  * retired per cycle (4) and then inverting the condition, we
1463                  * count all cycles that retire 16 or less micro-ops, which
1464                  * is every cycle.
1465                  *
1466                  * Thereby we gain a PEBS capable cycle counter.
1467                  */
1468                 u64 alt_config = X86_CONFIG(.event=0xc2, .umask=0x01, .inv=1, .cmask=16);
1469
1470                 alt_config |= (event->hw.config & ~X86_RAW_EVENT_MASK);
1471                 event->hw.config = alt_config;
1472         }
1473 }
1474
1475 static int intel_pmu_hw_config(struct perf_event *event)
1476 {
1477         int ret = x86_pmu_hw_config(event);
1478
1479         if (ret)
1480                 return ret;
1481
1482         if (event->attr.precise_ip && x86_pmu.pebs_aliases)
1483                 x86_pmu.pebs_aliases(event);
1484
1485         if (intel_pmu_needs_lbr_smpl(event)) {
1486                 ret = intel_pmu_setup_lbr_filter(event);
1487                 if (ret)
1488                         return ret;
1489         }
1490
1491         if (event->attr.type != PERF_TYPE_RAW)
1492                 return 0;
1493
1494         if (!(event->attr.config & ARCH_PERFMON_EVENTSEL_ANY))
1495                 return 0;
1496
1497         if (x86_pmu.version < 3)
1498                 return -EINVAL;
1499
1500         if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
1501                 return -EACCES;
1502
1503         event->hw.config |= ARCH_PERFMON_EVENTSEL_ANY;
1504
1505         return 0;
1506 }
1507
1508 struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr)
1509 {
1510         if (x86_pmu.guest_get_msrs)
1511                 return x86_pmu.guest_get_msrs(nr);
1512         *nr = 0;
1513         return NULL;
1514 }
1515 EXPORT_SYMBOL_GPL(perf_guest_get_msrs);
1516
1517 static struct perf_guest_switch_msr *intel_guest_get_msrs(int *nr)
1518 {
1519         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
1520         struct perf_guest_switch_msr *arr = cpuc->guest_switch_msrs;
1521
1522         arr[0].msr = MSR_CORE_PERF_GLOBAL_CTRL;
1523         arr[0].host = x86_pmu.intel_ctrl & ~cpuc->intel_ctrl_guest_mask;
1524         arr[0].guest = x86_pmu.intel_ctrl & ~cpuc->intel_ctrl_host_mask;
1525         /*
1526          * If PMU counter has PEBS enabled it is not enough to disable counter
1527          * on a guest entry since PEBS memory write can overshoot guest entry
1528          * and corrupt guest memory. Disabling PEBS solves the problem.
1529          */
1530         arr[1].msr = MSR_IA32_PEBS_ENABLE;
1531         arr[1].host = cpuc->pebs_enabled;
1532         arr[1].guest = 0;
1533
1534         *nr = 2;
1535         return arr;
1536 }
1537
1538 static struct perf_guest_switch_msr *core_guest_get_msrs(int *nr)
1539 {
1540         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
1541         struct perf_guest_switch_msr *arr = cpuc->guest_switch_msrs;
1542         int idx;
1543
1544         for (idx = 0; idx < x86_pmu.num_counters; idx++)  {
1545                 struct perf_event *event = cpuc->events[idx];
1546
1547                 arr[idx].msr = x86_pmu_config_addr(idx);
1548                 arr[idx].host = arr[idx].guest = 0;
1549
1550                 if (!test_bit(idx, cpuc->active_mask))
1551                         continue;
1552
1553                 arr[idx].host = arr[idx].guest =
1554                         event->hw.config | ARCH_PERFMON_EVENTSEL_ENABLE;
1555
1556                 if (event->attr.exclude_host)
1557                         arr[idx].host &= ~ARCH_PERFMON_EVENTSEL_ENABLE;
1558                 else if (event->attr.exclude_guest)
1559                         arr[idx].guest &= ~ARCH_PERFMON_EVENTSEL_ENABLE;
1560         }
1561
1562         *nr = x86_pmu.num_counters;
1563         return arr;
1564 }
1565
1566 static void core_pmu_enable_event(struct perf_event *event)
1567 {
1568         if (!event->attr.exclude_host)
1569                 x86_pmu_enable_event(event);
1570 }
1571
1572 static void core_pmu_enable_all(int added)
1573 {
1574         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
1575         int idx;
1576
1577         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
1578                 struct hw_perf_event *hwc = &cpuc->events[idx]->hw;
1579
1580                 if (!test_bit(idx, cpuc->active_mask) ||
1581                                 cpuc->events[idx]->attr.exclude_host)
1582                         continue;
1583
1584                 __x86_pmu_enable_event(hwc, ARCH_PERFMON_EVENTSEL_ENABLE);
1585         }
1586 }
1587
1588 PMU_FORMAT_ATTR(event,  "config:0-7"    );
1589 PMU_FORMAT_ATTR(umask,  "config:8-15"   );
1590 PMU_FORMAT_ATTR(edge,   "config:18"     );
1591 PMU_FORMAT_ATTR(pc,     "config:19"     );
1592 PMU_FORMAT_ATTR(any,    "config:21"     ); /* v3 + */
1593 PMU_FORMAT_ATTR(inv,    "config:23"     );
1594 PMU_FORMAT_ATTR(cmask,  "config:24-31"  );
1595
1596 static struct attribute *intel_arch_formats_attr[] = {
1597         &format_attr_event.attr,
1598         &format_attr_umask.attr,
1599         &format_attr_edge.attr,
1600         &format_attr_pc.attr,
1601         &format_attr_inv.attr,
1602         &format_attr_cmask.attr,
1603         NULL,
1604 };
1605
1606 static __initconst const struct x86_pmu core_pmu = {
1607         .name                   = "core",
1608         .handle_irq             = x86_pmu_handle_irq,
1609         .disable_all            = x86_pmu_disable_all,
1610         .enable_all             = core_pmu_enable_all,
1611         .enable                 = core_pmu_enable_event,
1612         .disable                = x86_pmu_disable_event,
1613         .hw_config              = x86_pmu_hw_config,
1614         .schedule_events        = x86_schedule_events,
1615         .eventsel               = MSR_ARCH_PERFMON_EVENTSEL0,
1616         .perfctr                = MSR_ARCH_PERFMON_PERFCTR0,
1617         .event_map              = intel_pmu_event_map,
1618         .max_events             = ARRAY_SIZE(intel_perfmon_event_map),
1619         .apic                   = 1,
1620         /*
1621          * Intel PMCs cannot be accessed sanely above 32 bit width,
1622          * so we install an artificial 1<<31 period regardless of
1623          * the generic event period:
1624          */
1625         .max_period             = (1ULL << 31) - 1,
1626         .get_event_constraints  = intel_get_event_constraints,
1627         .put_event_constraints  = intel_put_event_constraints,
1628         .event_constraints      = intel_core_event_constraints,
1629         .guest_get_msrs         = core_guest_get_msrs,
1630         .format_attrs           = intel_arch_formats_attr,
1631 };
1632
1633 struct intel_shared_regs *allocate_shared_regs(int cpu)
1634 {
1635         struct intel_shared_regs *regs;
1636         int i;
1637
1638         regs = kzalloc_node(sizeof(struct intel_shared_regs),
1639                             GFP_KERNEL, cpu_to_node(cpu));
1640         if (regs) {
1641                 /*
1642                  * initialize the locks to keep lockdep happy
1643                  */
1644                 for (i = 0; i < EXTRA_REG_MAX; i++)
1645                         raw_spin_lock_init(&regs->regs[i].lock);
1646
1647                 regs->core_id = -1;
1648         }
1649         return regs;
1650 }
1651
1652 static int intel_pmu_cpu_prepare(int cpu)
1653 {
1654         struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
1655
1656         if (!(x86_pmu.extra_regs || x86_pmu.lbr_sel_map))
1657                 return NOTIFY_OK;
1658
1659         cpuc->shared_regs = allocate_shared_regs(cpu);
1660         if (!cpuc->shared_regs)
1661                 return NOTIFY_BAD;
1662
1663         return NOTIFY_OK;
1664 }
1665
1666 static void intel_pmu_cpu_starting(int cpu)
1667 {
1668         struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
1669         int core_id = topology_core_id(cpu);
1670         int i;
1671
1672         init_debug_store_on_cpu(cpu);
1673         /*
1674          * Deal with CPUs that don't clear their LBRs on power-up.
1675          */
1676         intel_pmu_lbr_reset();
1677
1678         cpuc->lbr_sel = NULL;
1679
1680         if (!cpuc->shared_regs)
1681                 return;
1682
1683         if (!(x86_pmu.er_flags & ERF_NO_HT_SHARING)) {
1684                 for_each_cpu(i, topology_thread_cpumask(cpu)) {
1685                         struct intel_shared_regs *pc;
1686
1687                         pc = per_cpu(cpu_hw_events, i).shared_regs;
1688                         if (pc && pc->core_id == core_id) {
1689                                 cpuc->kfree_on_online = cpuc->shared_regs;
1690                                 cpuc->shared_regs = pc;
1691                                 break;
1692                         }
1693                 }
1694                 cpuc->shared_regs->core_id = core_id;
1695                 cpuc->shared_regs->refcnt++;
1696         }
1697
1698         if (x86_pmu.lbr_sel_map)
1699                 cpuc->lbr_sel = &cpuc->shared_regs->regs[EXTRA_REG_LBR];
1700 }
1701
1702 static void intel_pmu_cpu_dying(int cpu)
1703 {
1704         struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
1705         struct intel_shared_regs *pc;
1706
1707         pc = cpuc->shared_regs;
1708         if (pc) {
1709                 if (pc->core_id == -1 || --pc->refcnt == 0)
1710                         kfree(pc);
1711                 cpuc->shared_regs = NULL;
1712         }
1713
1714         fini_debug_store_on_cpu(cpu);
1715 }
1716
1717 static void intel_pmu_flush_branch_stack(void)
1718 {
1719         /*
1720          * Intel LBR does not tag entries with the
1721          * PID of the current task, then we need to
1722          * flush it on ctxsw
1723          * For now, we simply reset it
1724          */
1725         if (x86_pmu.lbr_nr)
1726                 intel_pmu_lbr_reset();
1727 }
1728
1729 PMU_FORMAT_ATTR(offcore_rsp, "config1:0-63");
1730
1731 static struct attribute *intel_arch3_formats_attr[] = {
1732         &format_attr_event.attr,
1733         &format_attr_umask.attr,
1734         &format_attr_edge.attr,
1735         &format_attr_pc.attr,
1736         &format_attr_any.attr,
1737         &format_attr_inv.attr,
1738         &format_attr_cmask.attr,
1739
1740         &format_attr_offcore_rsp.attr, /* XXX do NHM/WSM + SNB breakout */
1741         NULL,
1742 };
1743
1744 static __initconst const struct x86_pmu intel_pmu = {
1745         .name                   = "Intel",
1746         .handle_irq             = intel_pmu_handle_irq,
1747         .disable_all            = intel_pmu_disable_all,
1748         .enable_all             = intel_pmu_enable_all,
1749         .enable                 = intel_pmu_enable_event,
1750         .disable                = intel_pmu_disable_event,
1751         .hw_config              = intel_pmu_hw_config,
1752         .schedule_events        = x86_schedule_events,
1753         .eventsel               = MSR_ARCH_PERFMON_EVENTSEL0,
1754         .perfctr                = MSR_ARCH_PERFMON_PERFCTR0,
1755         .event_map              = intel_pmu_event_map,
1756         .max_events             = ARRAY_SIZE(intel_perfmon_event_map),
1757         .apic                   = 1,
1758         /*
1759          * Intel PMCs cannot be accessed sanely above 32 bit width,
1760          * so we install an artificial 1<<31 period regardless of
1761          * the generic event period:
1762          */
1763         .max_period             = (1ULL << 31) - 1,
1764         .get_event_constraints  = intel_get_event_constraints,
1765         .put_event_constraints  = intel_put_event_constraints,
1766         .pebs_aliases           = intel_pebs_aliases_core2,
1767
1768         .format_attrs           = intel_arch3_formats_attr,
1769
1770         .cpu_prepare            = intel_pmu_cpu_prepare,
1771         .cpu_starting           = intel_pmu_cpu_starting,
1772         .cpu_dying              = intel_pmu_cpu_dying,
1773         .guest_get_msrs         = intel_guest_get_msrs,
1774         .flush_branch_stack     = intel_pmu_flush_branch_stack,
1775 };
1776
1777 static __init void intel_clovertown_quirk(void)
1778 {
1779         /*
1780          * PEBS is unreliable due to:
1781          *
1782          *   AJ67  - PEBS may experience CPL leaks
1783          *   AJ68  - PEBS PMI may be delayed by one event
1784          *   AJ69  - GLOBAL_STATUS[62] will only be set when DEBUGCTL[12]
1785          *   AJ106 - FREEZE_LBRS_ON_PMI doesn't work in combination with PEBS
1786          *
1787          * AJ67 could be worked around by restricting the OS/USR flags.
1788          * AJ69 could be worked around by setting PMU_FREEZE_ON_PMI.
1789          *
1790          * AJ106 could possibly be worked around by not allowing LBR
1791          *       usage from PEBS, including the fixup.
1792          * AJ68  could possibly be worked around by always programming
1793          *       a pebs_event_reset[0] value and coping with the lost events.
1794          *
1795          * But taken together it might just make sense to not enable PEBS on
1796          * these chips.
1797          */
1798         pr_warn("PEBS disabled due to CPU errata\n");
1799         x86_pmu.pebs = 0;
1800         x86_pmu.pebs_constraints = NULL;
1801 }
1802
1803 static int intel_snb_pebs_broken(int cpu)
1804 {
1805         u32 rev = UINT_MAX; /* default to broken for unknown models */
1806
1807         switch (cpu_data(cpu).x86_model) {
1808         case 42: /* SNB */
1809                 rev = 0x28;
1810                 break;
1811
1812         case 45: /* SNB-EP */
1813                 switch (cpu_data(cpu).x86_mask) {
1814                 case 6: rev = 0x618; break;
1815                 case 7: rev = 0x70c; break;
1816                 }
1817         }
1818
1819         return (cpu_data(cpu).microcode < rev);
1820 }
1821
1822 static void intel_snb_check_microcode(void)
1823 {
1824         int pebs_broken = 0;
1825         int cpu;
1826
1827         get_online_cpus();
1828         for_each_online_cpu(cpu) {
1829                 if ((pebs_broken = intel_snb_pebs_broken(cpu)))
1830                         break;
1831         }
1832         put_online_cpus();
1833
1834         if (pebs_broken == x86_pmu.pebs_broken)
1835                 return;
1836
1837         /*
1838          * Serialized by the microcode lock..
1839          */
1840         if (x86_pmu.pebs_broken) {
1841                 pr_info("PEBS enabled due to microcode update\n");
1842                 x86_pmu.pebs_broken = 0;
1843         } else {
1844                 pr_info("PEBS disabled due to CPU errata, please upgrade microcode\n");
1845                 x86_pmu.pebs_broken = 1;
1846         }
1847 }
1848
1849 static __init void intel_sandybridge_quirk(void)
1850 {
1851         x86_pmu.check_microcode = intel_snb_check_microcode;
1852         intel_snb_check_microcode();
1853 }
1854
1855 static const struct { int id; char *name; } intel_arch_events_map[] __initconst = {
1856         { PERF_COUNT_HW_CPU_CYCLES, "cpu cycles" },
1857         { PERF_COUNT_HW_INSTRUCTIONS, "instructions" },
1858         { PERF_COUNT_HW_BUS_CYCLES, "bus cycles" },
1859         { PERF_COUNT_HW_CACHE_REFERENCES, "cache references" },
1860         { PERF_COUNT_HW_CACHE_MISSES, "cache misses" },
1861         { PERF_COUNT_HW_BRANCH_INSTRUCTIONS, "branch instructions" },
1862         { PERF_COUNT_HW_BRANCH_MISSES, "branch misses" },
1863 };
1864
1865 static __init void intel_arch_events_quirk(void)
1866 {
1867         int bit;
1868
1869         /* disable event that reported as not presend by cpuid */
1870         for_each_set_bit(bit, x86_pmu.events_mask, ARRAY_SIZE(intel_arch_events_map)) {
1871                 intel_perfmon_event_map[intel_arch_events_map[bit].id] = 0;
1872                 pr_warn("CPUID marked event: \'%s\' unavailable\n",
1873                         intel_arch_events_map[bit].name);
1874         }
1875 }
1876
1877 static __init void intel_nehalem_quirk(void)
1878 {
1879         union cpuid10_ebx ebx;
1880
1881         ebx.full = x86_pmu.events_maskl;
1882         if (ebx.split.no_branch_misses_retired) {
1883                 /*
1884                  * Erratum AAJ80 detected, we work it around by using
1885                  * the BR_MISP_EXEC.ANY event. This will over-count
1886                  * branch-misses, but it's still much better than the
1887                  * architectural event which is often completely bogus:
1888                  */
1889                 intel_perfmon_event_map[PERF_COUNT_HW_BRANCH_MISSES] = 0x7f89;
1890                 ebx.split.no_branch_misses_retired = 0;
1891                 x86_pmu.events_maskl = ebx.full;
1892                 pr_info("CPU erratum AAJ80 worked around\n");
1893         }
1894 }
1895
1896 __init int intel_pmu_init(void)
1897 {
1898         union cpuid10_edx edx;
1899         union cpuid10_eax eax;
1900         union cpuid10_ebx ebx;
1901         struct event_constraint *c;
1902         unsigned int unused;
1903         int version;
1904
1905         if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) {
1906                 switch (boot_cpu_data.x86) {
1907                 case 0x6:
1908                         return p6_pmu_init();
1909                 case 0xf:
1910                         return p4_pmu_init();
1911                 }
1912                 return -ENODEV;
1913         }
1914
1915         /*
1916          * Check whether the Architectural PerfMon supports
1917          * Branch Misses Retired hw_event or not.
1918          */
1919         cpuid(10, &eax.full, &ebx.full, &unused, &edx.full);
1920         if (eax.split.mask_length < ARCH_PERFMON_EVENTS_COUNT)
1921                 return -ENODEV;
1922
1923         version = eax.split.version_id;
1924         if (version < 2)
1925                 x86_pmu = core_pmu;
1926         else
1927                 x86_pmu = intel_pmu;
1928
1929         x86_pmu.version                 = version;
1930         x86_pmu.num_counters            = eax.split.num_counters;
1931         x86_pmu.cntval_bits             = eax.split.bit_width;
1932         x86_pmu.cntval_mask             = (1ULL << eax.split.bit_width) - 1;
1933
1934         x86_pmu.events_maskl            = ebx.full;
1935         x86_pmu.events_mask_len         = eax.split.mask_length;
1936
1937         x86_pmu.max_pebs_events         = min_t(unsigned, MAX_PEBS_EVENTS, x86_pmu.num_counters);
1938
1939         /*
1940          * Quirk: v2 perfmon does not report fixed-purpose events, so
1941          * assume at least 3 events:
1942          */
1943         if (version > 1)
1944                 x86_pmu.num_counters_fixed = max((int)edx.split.num_counters_fixed, 3);
1945
1946         /*
1947          * v2 and above have a perf capabilities MSR
1948          */
1949         if (version > 1) {
1950                 u64 capabilities;
1951
1952                 rdmsrl(MSR_IA32_PERF_CAPABILITIES, capabilities);
1953                 x86_pmu.intel_cap.capabilities = capabilities;
1954         }
1955
1956         intel_ds_init();
1957
1958         x86_add_quirk(intel_arch_events_quirk); /* Install first, so it runs last */
1959
1960         /*
1961          * Install the hw-cache-events table:
1962          */
1963         switch (boot_cpu_data.x86_model) {
1964         case 14: /* 65 nm core solo/duo, "Yonah" */
1965                 pr_cont("Core events, ");
1966                 break;
1967
1968         case 15: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
1969                 x86_add_quirk(intel_clovertown_quirk);
1970         case 22: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
1971         case 23: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
1972         case 29: /* six-core 45 nm xeon "Dunnington" */
1973                 memcpy(hw_cache_event_ids, core2_hw_cache_event_ids,
1974                        sizeof(hw_cache_event_ids));
1975
1976                 intel_pmu_lbr_init_core();
1977
1978                 x86_pmu.event_constraints = intel_core2_event_constraints;
1979                 x86_pmu.pebs_constraints = intel_core2_pebs_event_constraints;
1980                 pr_cont("Core2 events, ");
1981                 break;
1982
1983         case 26: /* 45 nm nehalem, "Bloomfield" */
1984         case 30: /* 45 nm nehalem, "Lynnfield" */
1985         case 46: /* 45 nm nehalem-ex, "Beckton" */
1986                 memcpy(hw_cache_event_ids, nehalem_hw_cache_event_ids,
1987                        sizeof(hw_cache_event_ids));
1988                 memcpy(hw_cache_extra_regs, nehalem_hw_cache_extra_regs,
1989                        sizeof(hw_cache_extra_regs));
1990
1991                 intel_pmu_lbr_init_nhm();
1992
1993                 x86_pmu.event_constraints = intel_nehalem_event_constraints;
1994                 x86_pmu.pebs_constraints = intel_nehalem_pebs_event_constraints;
1995                 x86_pmu.enable_all = intel_pmu_nhm_enable_all;
1996                 x86_pmu.extra_regs = intel_nehalem_extra_regs;
1997
1998                 /* UOPS_ISSUED.STALLED_CYCLES */
1999                 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
2000                         X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);
2001                 /* UOPS_EXECUTED.CORE_ACTIVE_CYCLES,c=1,i=1 */
2002                 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] =
2003                         X86_CONFIG(.event=0xb1, .umask=0x3f, .inv=1, .cmask=1);
2004
2005                 x86_add_quirk(intel_nehalem_quirk);
2006
2007                 pr_cont("Nehalem events, ");
2008                 break;
2009
2010         case 28: /* Atom */
2011         case 54: /* Cedariew */
2012                 memcpy(hw_cache_event_ids, atom_hw_cache_event_ids,
2013                        sizeof(hw_cache_event_ids));
2014
2015                 intel_pmu_lbr_init_atom();
2016
2017                 x86_pmu.event_constraints = intel_gen_event_constraints;
2018                 x86_pmu.pebs_constraints = intel_atom_pebs_event_constraints;
2019                 pr_cont("Atom events, ");
2020                 break;
2021
2022         case 37: /* 32 nm nehalem, "Clarkdale" */
2023         case 44: /* 32 nm nehalem, "Gulftown" */
2024         case 47: /* 32 nm Xeon E7 */
2025                 memcpy(hw_cache_event_ids, westmere_hw_cache_event_ids,
2026                        sizeof(hw_cache_event_ids));
2027                 memcpy(hw_cache_extra_regs, nehalem_hw_cache_extra_regs,
2028                        sizeof(hw_cache_extra_regs));
2029
2030                 intel_pmu_lbr_init_nhm();
2031
2032                 x86_pmu.event_constraints = intel_westmere_event_constraints;
2033                 x86_pmu.enable_all = intel_pmu_nhm_enable_all;
2034                 x86_pmu.pebs_constraints = intel_westmere_pebs_event_constraints;
2035                 x86_pmu.extra_regs = intel_westmere_extra_regs;
2036                 x86_pmu.er_flags |= ERF_HAS_RSP_1;
2037
2038                 /* UOPS_ISSUED.STALLED_CYCLES */
2039                 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
2040                         X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);
2041                 /* UOPS_EXECUTED.CORE_ACTIVE_CYCLES,c=1,i=1 */
2042                 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] =
2043                         X86_CONFIG(.event=0xb1, .umask=0x3f, .inv=1, .cmask=1);
2044
2045                 pr_cont("Westmere events, ");
2046                 break;
2047
2048         case 42: /* SandyBridge */
2049         case 45: /* SandyBridge, "Romely-EP" */
2050                 x86_add_quirk(intel_sandybridge_quirk);
2051         case 58: /* IvyBridge */
2052                 memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
2053                        sizeof(hw_cache_event_ids));
2054                 memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs,
2055                        sizeof(hw_cache_extra_regs));
2056
2057                 intel_pmu_lbr_init_snb();
2058
2059                 x86_pmu.event_constraints = intel_snb_event_constraints;
2060                 x86_pmu.pebs_constraints = intel_snb_pebs_event_constraints;
2061                 x86_pmu.pebs_aliases = intel_pebs_aliases_snb;
2062                 x86_pmu.extra_regs = intel_snb_extra_regs;
2063                 /* all extra regs are per-cpu when HT is on */
2064                 x86_pmu.er_flags |= ERF_HAS_RSP_1;
2065                 x86_pmu.er_flags |= ERF_NO_HT_SHARING;
2066
2067                 /* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */
2068                 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
2069                         X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);
2070                 /* UOPS_DISPATCHED.THREAD,c=1,i=1 to count stall cycles*/
2071                 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] =
2072                         X86_CONFIG(.event=0xb1, .umask=0x01, .inv=1, .cmask=1);
2073
2074                 pr_cont("SandyBridge events, ");
2075                 break;
2076
2077         default:
2078                 switch (x86_pmu.version) {
2079                 case 1:
2080                         x86_pmu.event_constraints = intel_v1_event_constraints;
2081                         pr_cont("generic architected perfmon v1, ");
2082                         break;
2083                 default:
2084                         /*
2085                          * default constraints for v2 and up
2086                          */
2087                         x86_pmu.event_constraints = intel_gen_event_constraints;
2088                         pr_cont("generic architected perfmon, ");
2089                         break;
2090                 }
2091         }
2092
2093         if (x86_pmu.num_counters > INTEL_PMC_MAX_GENERIC) {
2094                 WARN(1, KERN_ERR "hw perf events %d > max(%d), clipping!",
2095                      x86_pmu.num_counters, INTEL_PMC_MAX_GENERIC);
2096                 x86_pmu.num_counters = INTEL_PMC_MAX_GENERIC;
2097         }
2098         x86_pmu.intel_ctrl = (1 << x86_pmu.num_counters) - 1;
2099
2100         if (x86_pmu.num_counters_fixed > INTEL_PMC_MAX_FIXED) {
2101                 WARN(1, KERN_ERR "hw perf events fixed %d > max(%d), clipping!",
2102                      x86_pmu.num_counters_fixed, INTEL_PMC_MAX_FIXED);
2103                 x86_pmu.num_counters_fixed = INTEL_PMC_MAX_FIXED;
2104         }
2105
2106         x86_pmu.intel_ctrl |=
2107                 ((1LL << x86_pmu.num_counters_fixed)-1) << INTEL_PMC_IDX_FIXED;
2108
2109         if (x86_pmu.event_constraints) {
2110                 /*
2111                  * event on fixed counter2 (REF_CYCLES) only works on this
2112                  * counter, so do not extend mask to generic counters
2113                  */
2114                 for_each_event_constraint(c, x86_pmu.event_constraints) {
2115                         if (c->cmask != X86_RAW_EVENT_MASK
2116                             || c->idxmsk64 == INTEL_PMC_MSK_FIXED_REF_CYCLES) {
2117                                 continue;
2118                         }
2119
2120                         c->idxmsk64 |= (1ULL << x86_pmu.num_counters) - 1;
2121                         c->weight += x86_pmu.num_counters;
2122                 }
2123         }
2124
2125         return 0;
2126 }