1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Performance counter support for POWER6 processors. 4 * 5 * Copyright 2008-2009 Paul Mackerras, IBM Corporation. 6 */ 7 #include <linux/kernel.h> 8 #include <linux/perf_event.h> 9 #include <linux/string.h> 10 #include <asm/reg.h> 11 #include <asm/cputable.h> 12 13 /* 14 * Bits in event code for POWER6 15 */ 16 #define PM_PMC_SH 20 /* PMC number (1-based) for direct events */ 17 #define PM_PMC_MSK 0x7 18 #define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH) 19 #define PM_UNIT_SH 16 /* Unit event comes (TTMxSEL encoding) */ 20 #define PM_UNIT_MSK 0xf 21 #define PM_UNIT_MSKS (PM_UNIT_MSK << PM_UNIT_SH) 22 #define PM_LLAV 0x8000 /* Load lookahead match value */ 23 #define PM_LLA 0x4000 /* Load lookahead match enable */ 24 #define PM_BYTE_SH 12 /* Byte of event bus to use */ 25 #define PM_BYTE_MSK 3 26 #define PM_SUBUNIT_SH 8 /* Subunit event comes from (NEST_SEL enc.) */ 27 #define PM_SUBUNIT_MSK 7 28 #define PM_SUBUNIT_MSKS (PM_SUBUNIT_MSK << PM_SUBUNIT_SH) 29 #define PM_PMCSEL_MSK 0xff /* PMCxSEL value */ 30 #define PM_BUSEVENT_MSK 0xf3700 31 32 /* 33 * Bits in MMCR1 for POWER6 34 */ 35 #define MMCR1_TTM0SEL_SH 60 36 #define MMCR1_TTMSEL_SH(n) (MMCR1_TTM0SEL_SH - (n) * 4) 37 #define MMCR1_TTMSEL_MSK 0xf 38 #define MMCR1_TTMSEL(m, n) (((m) >> MMCR1_TTMSEL_SH(n)) & MMCR1_TTMSEL_MSK) 39 #define MMCR1_NESTSEL_SH 45 40 #define MMCR1_NESTSEL_MSK 0x7 41 #define MMCR1_NESTSEL(m) (((m) >> MMCR1_NESTSEL_SH) & MMCR1_NESTSEL_MSK) 42 #define MMCR1_PMC1_LLA (1ul << 44) 43 #define MMCR1_PMC1_LLA_VALUE (1ul << 39) 44 #define MMCR1_PMC1_ADDR_SEL (1ul << 35) 45 #define MMCR1_PMC1SEL_SH 24 46 #define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8) 47 #define MMCR1_PMCSEL_MSK 0xff 48 49 /* 50 * Map of which direct events on which PMCs are marked instruction events. 51 * Indexed by PMCSEL value >> 1. 52 * Bottom 4 bits are a map of which PMCs are interesting, 53 * top 4 bits say what sort of event: 54 * 0 = direct marked event, 55 * 1 = byte decode event, 56 * 4 = add/and event (PMC1 -> bits 0 & 4), 57 * 5 = add/and event (PMC1 -> bits 1 & 5), 58 * 6 = add/and event (PMC1 -> bits 2 & 6), 59 * 7 = add/and event (PMC1 -> bits 3 & 7). 60 */ 61 static unsigned char direct_event_is_marked[0x60 >> 1] = { 62 0, /* 00 */ 63 0, /* 02 */ 64 0, /* 04 */ 65 0x07, /* 06 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */ 66 0x04, /* 08 PM_MRK_DFU_FIN */ 67 0x06, /* 0a PM_MRK_IFU_FIN, PM_MRK_INST_FIN */ 68 0, /* 0c */ 69 0, /* 0e */ 70 0x02, /* 10 PM_MRK_INST_DISP */ 71 0x08, /* 12 PM_MRK_LSU_DERAT_MISS */ 72 0, /* 14 */ 73 0, /* 16 */ 74 0x0c, /* 18 PM_THRESH_TIMEO, PM_MRK_INST_FIN */ 75 0x0f, /* 1a PM_MRK_INST_DISP, PM_MRK_{FXU,FPU,LSU}_FIN */ 76 0x01, /* 1c PM_MRK_INST_ISSUED */ 77 0, /* 1e */ 78 0, /* 20 */ 79 0, /* 22 */ 80 0, /* 24 */ 81 0, /* 26 */ 82 0x15, /* 28 PM_MRK_DATA_FROM_L2MISS, PM_MRK_DATA_FROM_L3MISS */ 83 0, /* 2a */ 84 0, /* 2c */ 85 0, /* 2e */ 86 0x4f, /* 30 */ 87 0x7f, /* 32 */ 88 0x4f, /* 34 */ 89 0x5f, /* 36 */ 90 0x6f, /* 38 */ 91 0x4f, /* 3a */ 92 0, /* 3c */ 93 0x08, /* 3e PM_MRK_INST_TIMEO */ 94 0x1f, /* 40 */ 95 0x1f, /* 42 */ 96 0x1f, /* 44 */ 97 0x1f, /* 46 */ 98 0x1f, /* 48 */ 99 0x1f, /* 4a */ 100 0x1f, /* 4c */ 101 0x1f, /* 4e */ 102 0, /* 50 */ 103 0x05, /* 52 PM_MRK_BR_TAKEN, PM_MRK_BR_MPRED */ 104 0x1c, /* 54 PM_MRK_PTEG_FROM_L3MISS, PM_MRK_PTEG_FROM_L2MISS */ 105 0x02, /* 56 PM_MRK_LD_MISS_L1 */ 106 0, /* 58 */ 107 0, /* 5a */ 108 0, /* 5c */ 109 0, /* 5e */ 110 }; 111 112 /* 113 * Masks showing for each unit which bits are marked events. 114 * These masks are in LE order, i.e. 0x00000001 is byte 0, bit 0. 115 */ 116 static u32 marked_bus_events[16] = { 117 0x01000000, /* direct events set 1: byte 3 bit 0 */ 118 0x00010000, /* direct events set 2: byte 2 bit 0 */ 119 0, 0, 0, 0, /* IDU, IFU, nest: nothing */ 120 0x00000088, /* VMX set 1: byte 0 bits 3, 7 */ 121 0x000000c0, /* VMX set 2: byte 0 bits 4-7 */ 122 0x04010000, /* LSU set 1: byte 2 bit 0, byte 3 bit 2 */ 123 0xff010000u, /* LSU set 2: byte 2 bit 0, all of byte 3 */ 124 0, /* LSU set 3 */ 125 0x00000010, /* VMX set 3: byte 0 bit 4 */ 126 0, /* BFP set 1 */ 127 0x00000022, /* BFP set 2: byte 0 bits 1, 5 */ 128 0, 0 129 }; 130 131 /* 132 * Returns 1 if event counts things relating to marked instructions 133 * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not. 134 */ 135 static int power6_marked_instr_event(u64 event) 136 { 137 int pmc, psel, ptype; 138 int bit, byte, unit; 139 u32 mask; 140 141 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; 142 psel = (event & PM_PMCSEL_MSK) >> 1; /* drop edge/level bit */ 143 if (pmc >= 5) 144 return 0; 145 146 bit = -1; 147 if (psel < sizeof(direct_event_is_marked)) { 148 ptype = direct_event_is_marked[psel]; 149 if (pmc == 0 || !(ptype & (1 << (pmc - 1)))) 150 return 0; 151 ptype >>= 4; 152 if (ptype == 0) 153 return 1; 154 if (ptype == 1) 155 bit = 0; 156 else 157 bit = ptype ^ (pmc - 1); 158 } else if ((psel & 0x48) == 0x40) 159 bit = psel & 7; 160 161 if (!(event & PM_BUSEVENT_MSK) || bit == -1) 162 return 0; 163 164 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK; 165 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK; 166 mask = marked_bus_events[unit]; 167 return (mask >> (byte * 8 + bit)) & 1; 168 } 169 170 /* 171 * Assign PMC numbers and compute MMCR1 value for a set of events 172 */ 173 static int p6_compute_mmcr(u64 event[], int n_ev, 174 unsigned int hwc[], unsigned long mmcr[], struct perf_event *pevents[]) 175 { 176 unsigned long mmcr1 = 0; 177 unsigned long mmcra = MMCRA_SDAR_DCACHE_MISS | MMCRA_SDAR_ERAT_MISS; 178 int i; 179 unsigned int pmc, ev, b, u, s, psel; 180 unsigned int ttmset = 0; 181 unsigned int pmc_inuse = 0; 182 183 if (n_ev > 6) 184 return -1; 185 for (i = 0; i < n_ev; ++i) { 186 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK; 187 if (pmc) { 188 if (pmc_inuse & (1 << (pmc - 1))) 189 return -1; /* collision! */ 190 pmc_inuse |= 1 << (pmc - 1); 191 } 192 } 193 for (i = 0; i < n_ev; ++i) { 194 ev = event[i]; 195 pmc = (ev >> PM_PMC_SH) & PM_PMC_MSK; 196 if (pmc) { 197 --pmc; 198 } else { 199 /* can go on any PMC; find a free one */ 200 for (pmc = 0; pmc < 4; ++pmc) 201 if (!(pmc_inuse & (1 << pmc))) 202 break; 203 if (pmc >= 4) 204 return -1; 205 pmc_inuse |= 1 << pmc; 206 } 207 hwc[i] = pmc; 208 psel = ev & PM_PMCSEL_MSK; 209 if (ev & PM_BUSEVENT_MSK) { 210 /* this event uses the event bus */ 211 b = (ev >> PM_BYTE_SH) & PM_BYTE_MSK; 212 u = (ev >> PM_UNIT_SH) & PM_UNIT_MSK; 213 /* check for conflict on this byte of event bus */ 214 if ((ttmset & (1 << b)) && MMCR1_TTMSEL(mmcr1, b) != u) 215 return -1; 216 mmcr1 |= (unsigned long)u << MMCR1_TTMSEL_SH(b); 217 ttmset |= 1 << b; 218 if (u == 5) { 219 /* Nest events have a further mux */ 220 s = (ev >> PM_SUBUNIT_SH) & PM_SUBUNIT_MSK; 221 if ((ttmset & 0x10) && 222 MMCR1_NESTSEL(mmcr1) != s) 223 return -1; 224 ttmset |= 0x10; 225 mmcr1 |= (unsigned long)s << MMCR1_NESTSEL_SH; 226 } 227 if (0x30 <= psel && psel <= 0x3d) { 228 /* these need the PMCx_ADDR_SEL bits */ 229 if (b >= 2) 230 mmcr1 |= MMCR1_PMC1_ADDR_SEL >> pmc; 231 } 232 /* bus select values are different for PMC3/4 */ 233 if (pmc >= 2 && (psel & 0x90) == 0x80) 234 psel ^= 0x20; 235 } 236 if (ev & PM_LLA) { 237 mmcr1 |= MMCR1_PMC1_LLA >> pmc; 238 if (ev & PM_LLAV) 239 mmcr1 |= MMCR1_PMC1_LLA_VALUE >> pmc; 240 } 241 if (power6_marked_instr_event(event[i])) 242 mmcra |= MMCRA_SAMPLE_ENABLE; 243 if (pmc < 4) 244 mmcr1 |= (unsigned long)psel << MMCR1_PMCSEL_SH(pmc); 245 } 246 mmcr[0] = 0; 247 if (pmc_inuse & 1) 248 mmcr[0] = MMCR0_PMC1CE; 249 if (pmc_inuse & 0xe) 250 mmcr[0] |= MMCR0_PMCjCE; 251 mmcr[1] = mmcr1; 252 mmcr[2] = mmcra; 253 return 0; 254 } 255 256 /* 257 * Layout of constraint bits: 258 * 259 * 0-1 add field: number of uses of PMC1 (max 1) 260 * 2-3, 4-5, 6-7, 8-9, 10-11: ditto for PMC2, 3, 4, 5, 6 261 * 12-15 add field: number of uses of PMC1-4 (max 4) 262 * 16-19 select field: unit on byte 0 of event bus 263 * 20-23, 24-27, 28-31 ditto for bytes 1, 2, 3 264 * 32-34 select field: nest (subunit) event selector 265 */ 266 static int p6_get_constraint(u64 event, unsigned long *maskp, 267 unsigned long *valp) 268 { 269 int pmc, byte, sh, subunit; 270 unsigned long mask = 0, value = 0; 271 272 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; 273 if (pmc) { 274 if (pmc > 4 && !(event == 0x500009 || event == 0x600005)) 275 return -1; 276 sh = (pmc - 1) * 2; 277 mask |= 2 << sh; 278 value |= 1 << sh; 279 } 280 if (event & PM_BUSEVENT_MSK) { 281 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK; 282 sh = byte * 4 + (16 - PM_UNIT_SH); 283 mask |= PM_UNIT_MSKS << sh; 284 value |= (unsigned long)(event & PM_UNIT_MSKS) << sh; 285 if ((event & PM_UNIT_MSKS) == (5 << PM_UNIT_SH)) { 286 subunit = (event >> PM_SUBUNIT_SH) & PM_SUBUNIT_MSK; 287 mask |= (unsigned long)PM_SUBUNIT_MSK << 32; 288 value |= (unsigned long)subunit << 32; 289 } 290 } 291 if (pmc <= 4) { 292 mask |= 0x8000; /* add field for count of PMC1-4 uses */ 293 value |= 0x1000; 294 } 295 *maskp = mask; 296 *valp = value; 297 return 0; 298 } 299 300 static int p6_limited_pmc_event(u64 event) 301 { 302 int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; 303 304 return pmc == 5 || pmc == 6; 305 } 306 307 #define MAX_ALT 4 /* at most 4 alternatives for any event */ 308 309 static const unsigned int event_alternatives[][MAX_ALT] = { 310 { 0x0130e8, 0x2000f6, 0x3000fc }, /* PM_PTEG_RELOAD_VALID */ 311 { 0x080080, 0x10000d, 0x30000c, 0x4000f0 }, /* PM_LD_MISS_L1 */ 312 { 0x080088, 0x200054, 0x3000f0 }, /* PM_ST_MISS_L1 */ 313 { 0x10000a, 0x2000f4, 0x600005 }, /* PM_RUN_CYC */ 314 { 0x10000b, 0x2000f5 }, /* PM_RUN_COUNT */ 315 { 0x10000e, 0x400010 }, /* PM_PURR */ 316 { 0x100010, 0x4000f8 }, /* PM_FLUSH */ 317 { 0x10001a, 0x200010 }, /* PM_MRK_INST_DISP */ 318 { 0x100026, 0x3000f8 }, /* PM_TB_BIT_TRANS */ 319 { 0x100054, 0x2000f0 }, /* PM_ST_FIN */ 320 { 0x100056, 0x2000fc }, /* PM_L1_ICACHE_MISS */ 321 { 0x1000f0, 0x40000a }, /* PM_INST_IMC_MATCH_CMPL */ 322 { 0x1000f8, 0x200008 }, /* PM_GCT_EMPTY_CYC */ 323 { 0x1000fc, 0x400006 }, /* PM_LSU_DERAT_MISS_CYC */ 324 { 0x20000e, 0x400007 }, /* PM_LSU_DERAT_MISS */ 325 { 0x200012, 0x300012 }, /* PM_INST_DISP */ 326 { 0x2000f2, 0x3000f2 }, /* PM_INST_DISP */ 327 { 0x2000f8, 0x300010 }, /* PM_EXT_INT */ 328 { 0x2000fe, 0x300056 }, /* PM_DATA_FROM_L2MISS */ 329 { 0x2d0030, 0x30001a }, /* PM_MRK_FPU_FIN */ 330 { 0x30000a, 0x400018 }, /* PM_MRK_INST_FIN */ 331 { 0x3000f6, 0x40000e }, /* PM_L1_DCACHE_RELOAD_VALID */ 332 { 0x3000fe, 0x400056 }, /* PM_DATA_FROM_L3MISS */ 333 }; 334 335 /* 336 * This could be made more efficient with a binary search on 337 * a presorted list, if necessary 338 */ 339 static int find_alternatives_list(u64 event) 340 { 341 int i, j; 342 unsigned int alt; 343 344 for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) { 345 if (event < event_alternatives[i][0]) 346 return -1; 347 for (j = 0; j < MAX_ALT; ++j) { 348 alt = event_alternatives[i][j]; 349 if (!alt || event < alt) 350 break; 351 if (event == alt) 352 return i; 353 } 354 } 355 return -1; 356 } 357 358 static int p6_get_alternatives(u64 event, unsigned int flags, u64 alt[]) 359 { 360 int i, j, nlim; 361 unsigned int psel, pmc; 362 unsigned int nalt = 1; 363 u64 aevent; 364 365 alt[0] = event; 366 nlim = p6_limited_pmc_event(event); 367 368 /* check the alternatives table */ 369 i = find_alternatives_list(event); 370 if (i >= 0) { 371 /* copy out alternatives from list */ 372 for (j = 0; j < MAX_ALT; ++j) { 373 aevent = event_alternatives[i][j]; 374 if (!aevent) 375 break; 376 if (aevent != event) 377 alt[nalt++] = aevent; 378 nlim += p6_limited_pmc_event(aevent); 379 } 380 381 } else { 382 /* Check for alternative ways of computing sum events */ 383 /* PMCSEL 0x32 counter N == PMCSEL 0x34 counter 5-N */ 384 psel = event & (PM_PMCSEL_MSK & ~1); /* ignore edge bit */ 385 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; 386 if (pmc && (psel == 0x32 || psel == 0x34)) 387 alt[nalt++] = ((event ^ 0x6) & ~PM_PMC_MSKS) | 388 ((5 - pmc) << PM_PMC_SH); 389 390 /* PMCSEL 0x38 counter N == PMCSEL 0x3a counter N+/-2 */ 391 if (pmc && (psel == 0x38 || psel == 0x3a)) 392 alt[nalt++] = ((event ^ 0x2) & ~PM_PMC_MSKS) | 393 ((pmc > 2? pmc - 2: pmc + 2) << PM_PMC_SH); 394 } 395 396 if (flags & PPMU_ONLY_COUNT_RUN) { 397 /* 398 * We're only counting in RUN state, 399 * so PM_CYC is equivalent to PM_RUN_CYC, 400 * PM_INST_CMPL === PM_RUN_INST_CMPL, PM_PURR === PM_RUN_PURR. 401 * This doesn't include alternatives that don't provide 402 * any extra flexibility in assigning PMCs (e.g. 403 * 0x10000a for PM_RUN_CYC vs. 0x1e for PM_CYC). 404 * Note that even with these additional alternatives 405 * we never end up with more than 4 alternatives for any event. 406 */ 407 j = nalt; 408 for (i = 0; i < nalt; ++i) { 409 switch (alt[i]) { 410 case 0x1e: /* PM_CYC */ 411 alt[j++] = 0x600005; /* PM_RUN_CYC */ 412 ++nlim; 413 break; 414 case 0x10000a: /* PM_RUN_CYC */ 415 alt[j++] = 0x1e; /* PM_CYC */ 416 break; 417 case 2: /* PM_INST_CMPL */ 418 alt[j++] = 0x500009; /* PM_RUN_INST_CMPL */ 419 ++nlim; 420 break; 421 case 0x500009: /* PM_RUN_INST_CMPL */ 422 alt[j++] = 2; /* PM_INST_CMPL */ 423 break; 424 case 0x10000e: /* PM_PURR */ 425 alt[j++] = 0x4000f4; /* PM_RUN_PURR */ 426 break; 427 case 0x4000f4: /* PM_RUN_PURR */ 428 alt[j++] = 0x10000e; /* PM_PURR */ 429 break; 430 } 431 } 432 nalt = j; 433 } 434 435 if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) { 436 /* remove the limited PMC events */ 437 j = 0; 438 for (i = 0; i < nalt; ++i) { 439 if (!p6_limited_pmc_event(alt[i])) { 440 alt[j] = alt[i]; 441 ++j; 442 } 443 } 444 nalt = j; 445 } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) { 446 /* remove all but the limited PMC events */ 447 j = 0; 448 for (i = 0; i < nalt; ++i) { 449 if (p6_limited_pmc_event(alt[i])) { 450 alt[j] = alt[i]; 451 ++j; 452 } 453 } 454 nalt = j; 455 } 456 457 return nalt; 458 } 459 460 static void p6_disable_pmc(unsigned int pmc, unsigned long mmcr[]) 461 { 462 /* Set PMCxSEL to 0 to disable PMCx */ 463 if (pmc <= 3) 464 mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SH(pmc)); 465 } 466 467 static int power6_generic_events[] = { 468 [PERF_COUNT_HW_CPU_CYCLES] = 0x1e, 469 [PERF_COUNT_HW_INSTRUCTIONS] = 2, 470 [PERF_COUNT_HW_CACHE_REFERENCES] = 0x280030, /* LD_REF_L1 */ 471 [PERF_COUNT_HW_CACHE_MISSES] = 0x30000c, /* LD_MISS_L1 */ 472 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x410a0, /* BR_PRED */ 473 [PERF_COUNT_HW_BRANCH_MISSES] = 0x400052, /* BR_MPRED */ 474 }; 475 476 #define C(x) PERF_COUNT_HW_CACHE_##x 477 478 /* 479 * Table of generalized cache-related events. 480 * 0 means not supported, -1 means nonsensical, other values 481 * are event codes. 482 * The "DTLB" and "ITLB" events relate to the DERAT and IERAT. 483 */ 484 static int power6_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { 485 [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */ 486 [C(OP_READ)] = { 0x280030, 0x80080 }, 487 [C(OP_WRITE)] = { 0x180032, 0x80088 }, 488 [C(OP_PREFETCH)] = { 0x810a4, 0 }, 489 }, 490 [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */ 491 [C(OP_READ)] = { 0, 0x100056 }, 492 [C(OP_WRITE)] = { -1, -1 }, 493 [C(OP_PREFETCH)] = { 0x4008c, 0 }, 494 }, 495 [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */ 496 [C(OP_READ)] = { 0x150730, 0x250532 }, 497 [C(OP_WRITE)] = { 0x250432, 0x150432 }, 498 [C(OP_PREFETCH)] = { 0x810a6, 0 }, 499 }, 500 [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */ 501 [C(OP_READ)] = { 0, 0x20000e }, 502 [C(OP_WRITE)] = { -1, -1 }, 503 [C(OP_PREFETCH)] = { -1, -1 }, 504 }, 505 [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */ 506 [C(OP_READ)] = { 0, 0x420ce }, 507 [C(OP_WRITE)] = { -1, -1 }, 508 [C(OP_PREFETCH)] = { -1, -1 }, 509 }, 510 [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */ 511 [C(OP_READ)] = { 0x430e6, 0x400052 }, 512 [C(OP_WRITE)] = { -1, -1 }, 513 [C(OP_PREFETCH)] = { -1, -1 }, 514 }, 515 [C(NODE)] = { /* RESULT_ACCESS RESULT_MISS */ 516 [C(OP_READ)] = { -1, -1 }, 517 [C(OP_WRITE)] = { -1, -1 }, 518 [C(OP_PREFETCH)] = { -1, -1 }, 519 }, 520 }; 521 522 static struct power_pmu power6_pmu = { 523 .name = "POWER6", 524 .n_counter = 6, 525 .max_alternatives = MAX_ALT, 526 .add_fields = 0x1555, 527 .test_adder = 0x3000, 528 .compute_mmcr = p6_compute_mmcr, 529 .get_constraint = p6_get_constraint, 530 .get_alternatives = p6_get_alternatives, 531 .disable_pmc = p6_disable_pmc, 532 .limited_pmc_event = p6_limited_pmc_event, 533 .flags = PPMU_LIMITED_PMC5_6 | PPMU_ALT_SIPR, 534 .n_generic = ARRAY_SIZE(power6_generic_events), 535 .generic_events = power6_generic_events, 536 .cache_events = &power6_cache_events, 537 }; 538 539 int init_power6_pmu(void) 540 { 541 if (!cur_cpu_spec->oprofile_cpu_type || 542 strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power6")) 543 return -ENODEV; 544 545 return register_power_pmu(&power6_pmu); 546 } 547