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