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#include "internal.h" 14 15/* 16 * Bits in event code for POWER6 17 */ 18#define PM_PMC_SH 20 /* PMC number (1-based) for direct events */ 19#define PM_PMC_MSK 0x7 20#define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH) 21#define PM_UNIT_SH 16 /* Unit event comes (TTMxSEL encoding) */ 22#define PM_UNIT_MSK 0xf 23#define PM_UNIT_MSKS (PM_UNIT_MSK << PM_UNIT_SH) 24#define PM_LLAV 0x8000 /* Load lookahead match value */ 25#define PM_LLA 0x4000 /* Load lookahead match enable */ 26#define PM_BYTE_SH 12 /* Byte of event bus to use */ 27#define PM_BYTE_MSK 3 28#define PM_SUBUNIT_SH 8 /* Subunit event comes from (NEST_SEL enc.) */ 29#define PM_SUBUNIT_MSK 7 30#define PM_SUBUNIT_MSKS (PM_SUBUNIT_MSK << PM_SUBUNIT_SH) 31#define PM_PMCSEL_MSK 0xff /* PMCxSEL value */ 32#define PM_BUSEVENT_MSK 0xf3700 33 34/* 35 * Bits in MMCR1 for POWER6 36 */ 37#define MMCR1_TTM0SEL_SH 60 38#define MMCR1_TTMSEL_SH(n) (MMCR1_TTM0SEL_SH - (n) * 4) 39#define MMCR1_TTMSEL_MSK 0xf 40#define MMCR1_TTMSEL(m, n) (((m) >> MMCR1_TTMSEL_SH(n)) & MMCR1_TTMSEL_MSK) 41#define MMCR1_NESTSEL_SH 45 42#define MMCR1_NESTSEL_MSK 0x7 43#define MMCR1_NESTSEL(m) (((m) >> MMCR1_NESTSEL_SH) & MMCR1_NESTSEL_MSK) 44#define MMCR1_PMC1_LLA (1ul << 44) 45#define MMCR1_PMC1_LLA_VALUE (1ul << 39) 46#define MMCR1_PMC1_ADDR_SEL (1ul << 35) 47#define MMCR1_PMC1SEL_SH 24 48#define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8) 49#define MMCR1_PMCSEL_MSK 0xff 50 51/* 52 * Map of which direct events on which PMCs are marked instruction events. 53 * Indexed by PMCSEL value >> 1. 54 * Bottom 4 bits are a map of which PMCs are interesting, 55 * top 4 bits say what sort of event: 56 * 0 = direct marked event, 57 * 1 = byte decode event, 58 * 4 = add/and event (PMC1 -> bits 0 & 4), 59 * 5 = add/and event (PMC1 -> bits 1 & 5), 60 * 6 = add/and event (PMC1 -> bits 2 & 6), 61 * 7 = add/and event (PMC1 -> bits 3 & 7). 62 */ 63static unsigned char direct_event_is_marked[0x60 >> 1] = { 64 0, /* 00 */ 65 0, /* 02 */ 66 0, /* 04 */ 67 0x07, /* 06 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */ 68 0x04, /* 08 PM_MRK_DFU_FIN */ 69 0x06, /* 0a PM_MRK_IFU_FIN, PM_MRK_INST_FIN */ 70 0, /* 0c */ 71 0, /* 0e */ 72 0x02, /* 10 PM_MRK_INST_DISP */ 73 0x08, /* 12 PM_MRK_LSU_DERAT_MISS */ 74 0, /* 14 */ 75 0, /* 16 */ 76 0x0c, /* 18 PM_THRESH_TIMEO, PM_MRK_INST_FIN */ 77 0x0f, /* 1a PM_MRK_INST_DISP, PM_MRK_{FXU,FPU,LSU}_FIN */ 78 0x01, /* 1c PM_MRK_INST_ISSUED */ 79 0, /* 1e */ 80 0, /* 20 */ 81 0, /* 22 */ 82 0, /* 24 */ 83 0, /* 26 */ 84 0x15, /* 28 PM_MRK_DATA_FROM_L2MISS, PM_MRK_DATA_FROM_L3MISS */ 85 0, /* 2a */ 86 0, /* 2c */ 87 0, /* 2e */ 88 0x4f, /* 30 */ 89 0x7f, /* 32 */ 90 0x4f, /* 34 */ 91 0x5f, /* 36 */ 92 0x6f, /* 38 */ 93 0x4f, /* 3a */ 94 0, /* 3c */ 95 0x08, /* 3e PM_MRK_INST_TIMEO */ 96 0x1f, /* 40 */ 97 0x1f, /* 42 */ 98 0x1f, /* 44 */ 99 0x1f, /* 46 */ 100 0x1f, /* 48 */ 101 0x1f, /* 4a */ 102 0x1f, /* 4c */ 103 0x1f, /* 4e */ 104 0, /* 50 */ 105 0x05, /* 52 PM_MRK_BR_TAKEN, PM_MRK_BR_MPRED */ 106 0x1c, /* 54 PM_MRK_PTEG_FROM_L3MISS, PM_MRK_PTEG_FROM_L2MISS */ 107 0x02, /* 56 PM_MRK_LD_MISS_L1 */ 108 0, /* 58 */ 109 0, /* 5a */ 110 0, /* 5c */ 111 0, /* 5e */ 112}; 113 114/* 115 * Masks showing for each unit which bits are marked events. 116 * These masks are in LE order, i.e. 0x00000001 is byte 0, bit 0. 117 */ 118static u32 marked_bus_events[16] = { 119 0x01000000, /* direct events set 1: byte 3 bit 0 */ 120 0x00010000, /* direct events set 2: byte 2 bit 0 */ 121 0, 0, 0, 0, /* IDU, IFU, nest: nothing */ 122 0x00000088, /* VMX set 1: byte 0 bits 3, 7 */ 123 0x000000c0, /* VMX set 2: byte 0 bits 4-7 */ 124 0x04010000, /* LSU set 1: byte 2 bit 0, byte 3 bit 2 */ 125 0xff010000u, /* LSU set 2: byte 2 bit 0, all of byte 3 */ 126 0, /* LSU set 3 */ 127 0x00000010, /* VMX set 3: byte 0 bit 4 */ 128 0, /* BFP set 1 */ 129 0x00000022, /* BFP set 2: byte 0 bits 1, 5 */ 130 0, 0 131}; 132 133/* 134 * Returns 1 if event counts things relating to marked instructions 135 * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not. 136 */ 137static int power6_marked_instr_event(u64 event) 138{ 139 int pmc, psel, ptype; 140 int bit, byte, unit; 141 u32 mask; 142 143 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; 144 psel = (event & PM_PMCSEL_MSK) >> 1; /* drop edge/level bit */ 145 if (pmc >= 5) 146 return 0; 147 148 bit = -1; 149 if (psel < sizeof(direct_event_is_marked)) { 150 ptype = direct_event_is_marked[psel]; 151 if (pmc == 0 || !(ptype & (1 << (pmc - 1)))) 152 return 0; 153 ptype >>= 4; 154 if (ptype == 0) 155 return 1; 156 if (ptype == 1) 157 bit = 0; 158 else 159 bit = ptype ^ (pmc - 1); 160 } else if ((psel & 0x48) == 0x40) 161 bit = psel & 7; 162 163 if (!(event & PM_BUSEVENT_MSK) || bit == -1) 164 return 0; 165 166 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK; 167 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK; 168 mask = marked_bus_events[unit]; 169 return (mask >> (byte * 8 + bit)) & 1; 170} 171 172/* 173 * Assign PMC numbers and compute MMCR1 value for a set of events 174 */ 175static int p6_compute_mmcr(u64 event[], int n_ev, 176 unsigned int hwc[], struct mmcr_regs *mmcr, struct perf_event *pevents[], 177 u32 flags __maybe_unused) 178{ 179 unsigned long mmcr1 = 0; 180 unsigned long mmcra = MMCRA_SDAR_DCACHE_MISS | MMCRA_SDAR_ERAT_MISS; 181 int i; 182 unsigned int pmc, ev, b, u, s, psel; 183 unsigned int ttmset = 0; 184 unsigned int pmc_inuse = 0; 185 186 if (n_ev > 6) 187 return -1; 188 for (i = 0; i < n_ev; ++i) { 189 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK; 190 if (pmc) { 191 if (pmc_inuse & (1 << (pmc - 1))) 192 return -1; /* collision! */ 193 pmc_inuse |= 1 << (pmc - 1); 194 } 195 } 196 for (i = 0; i < n_ev; ++i) { 197 ev = event[i]; 198 pmc = (ev >> PM_PMC_SH) & PM_PMC_MSK; 199 if (pmc) { 200 --pmc; 201 } else { 202 /* can go on any PMC; find a free one */ 203 for (pmc = 0; pmc < 4; ++pmc) 204 if (!(pmc_inuse & (1 << pmc))) 205 break; 206 if (pmc >= 4) 207 return -1; 208 pmc_inuse |= 1 << pmc; 209 } 210 hwc[i] = pmc; 211 psel = ev & PM_PMCSEL_MSK; 212 if (ev & PM_BUSEVENT_MSK) { 213 /* this event uses the event bus */ 214 b = (ev >> PM_BYTE_SH) & PM_BYTE_MSK; 215 u = (ev >> PM_UNIT_SH) & PM_UNIT_MSK; 216 /* check for conflict on this byte of event bus */ 217 if ((ttmset & (1 << b)) && MMCR1_TTMSEL(mmcr1, b) != u) 218 return -1; 219 mmcr1 |= (unsigned long)u << MMCR1_TTMSEL_SH(b); 220 ttmset |= 1 << b; 221 if (u == 5) { 222 /* Nest events have a further mux */ 223 s = (ev >> PM_SUBUNIT_SH) & PM_SUBUNIT_MSK; 224 if ((ttmset & 0x10) && 225 MMCR1_NESTSEL(mmcr1) != s) 226 return -1; 227 ttmset |= 0x10; 228 mmcr1 |= (unsigned long)s << MMCR1_NESTSEL_SH; 229 } 230 if (0x30 <= psel && psel <= 0x3d) { 231 /* these need the PMCx_ADDR_SEL bits */ 232 if (b >= 2) 233 mmcr1 |= MMCR1_PMC1_ADDR_SEL >> pmc; 234 } 235 /* bus select values are different for PMC3/4 */ 236 if (pmc >= 2 && (psel & 0x90) == 0x80) 237 psel ^= 0x20; 238 } 239 if (ev & PM_LLA) { 240 mmcr1 |= MMCR1_PMC1_LLA >> pmc; 241 if (ev & PM_LLAV) 242 mmcr1 |= MMCR1_PMC1_LLA_VALUE >> pmc; 243 } 244 if (power6_marked_instr_event(event[i])) 245 mmcra |= MMCRA_SAMPLE_ENABLE; 246 if (pmc < 4) 247 mmcr1 |= (unsigned long)psel << MMCR1_PMCSEL_SH(pmc); 248 } 249 mmcr->mmcr0 = 0; 250 if (pmc_inuse & 1) 251 mmcr->mmcr0 = MMCR0_PMC1CE; 252 if (pmc_inuse & 0xe) 253 mmcr->mmcr0 |= MMCR0_PMCjCE; 254 mmcr->mmcr1 = mmcr1; 255 mmcr->mmcra = mmcra; 256 return 0; 257} 258 259/* 260 * Layout of constraint bits: 261 * 262 * 0-1 add field: number of uses of PMC1 (max 1) 263 * 2-3, 4-5, 6-7, 8-9, 10-11: ditto for PMC2, 3, 4, 5, 6 264 * 12-15 add field: number of uses of PMC1-4 (max 4) 265 * 16-19 select field: unit on byte 0 of event bus 266 * 20-23, 24-27, 28-31 ditto for bytes 1, 2, 3 267 * 32-34 select field: nest (subunit) event selector 268 */ 269static int p6_get_constraint(u64 event, unsigned long *maskp, 270 unsigned long *valp, u64 event_config1 __maybe_unused) 271{ 272 int pmc, byte, sh, subunit; 273 unsigned long mask = 0, value = 0; 274 275 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; 276 if (pmc) { 277 if (pmc > 4 && !(event == 0x500009 || event == 0x600005)) 278 return -1; 279 sh = (pmc - 1) * 2; 280 mask |= 2 << sh; 281 value |= 1 << sh; 282 } 283 if (event & PM_BUSEVENT_MSK) { 284 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK; 285 sh = byte * 4 + (16 - PM_UNIT_SH); 286 mask |= PM_UNIT_MSKS << sh; 287 value |= (unsigned long)(event & PM_UNIT_MSKS) << sh; 288 if ((event & PM_UNIT_MSKS) == (5 << PM_UNIT_SH)) { 289 subunit = (event >> PM_SUBUNIT_SH) & PM_SUBUNIT_MSK; 290 mask |= (unsigned long)PM_SUBUNIT_MSK << 32; 291 value |= (unsigned long)subunit << 32; 292 } 293 } 294 if (pmc <= 4) { 295 mask |= 0x8000; /* add field for count of PMC1-4 uses */ 296 value |= 0x1000; 297 } 298 *maskp = mask; 299 *valp = value; 300 return 0; 301} 302 303static int p6_limited_pmc_event(u64 event) 304{ 305 int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; 306 307 return pmc == 5 || pmc == 6; 308} 309 310#define MAX_ALT 4 /* at most 4 alternatives for any event */ 311 312static const unsigned int event_alternatives[][MAX_ALT] = { 313 { 0x0130e8, 0x2000f6, 0x3000fc }, /* PM_PTEG_RELOAD_VALID */ 314 { 0x080080, 0x10000d, 0x30000c, 0x4000f0 }, /* PM_LD_MISS_L1 */ 315 { 0x080088, 0x200054, 0x3000f0 }, /* PM_ST_MISS_L1 */ 316 { 0x10000a, 0x2000f4, 0x600005 }, /* PM_RUN_CYC */ 317 { 0x10000b, 0x2000f5 }, /* PM_RUN_COUNT */ 318 { 0x10000e, 0x400010 }, /* PM_PURR */ 319 { 0x100010, 0x4000f8 }, /* PM_FLUSH */ 320 { 0x10001a, 0x200010 }, /* PM_MRK_INST_DISP */ 321 { 0x100026, 0x3000f8 }, /* PM_TB_BIT_TRANS */ 322 { 0x100054, 0x2000f0 }, /* PM_ST_FIN */ 323 { 0x100056, 0x2000fc }, /* PM_L1_ICACHE_MISS */ 324 { 0x1000f0, 0x40000a }, /* PM_INST_IMC_MATCH_CMPL */ 325 { 0x1000f8, 0x200008 }, /* PM_GCT_EMPTY_CYC */ 326 { 0x1000fc, 0x400006 }, /* PM_LSU_DERAT_MISS_CYC */ 327 { 0x20000e, 0x400007 }, /* PM_LSU_DERAT_MISS */ 328 { 0x200012, 0x300012 }, /* PM_INST_DISP */ 329 { 0x2000f2, 0x3000f2 }, /* PM_INST_DISP */ 330 { 0x2000f8, 0x300010 }, /* PM_EXT_INT */ 331 { 0x2000fe, 0x300056 }, /* PM_DATA_FROM_L2MISS */ 332 { 0x2d0030, 0x30001a }, /* PM_MRK_FPU_FIN */ 333 { 0x30000a, 0x400018 }, /* PM_MRK_INST_FIN */ 334 { 0x3000f6, 0x40000e }, /* PM_L1_DCACHE_RELOAD_VALID */ 335 { 0x3000fe, 0x400056 }, /* PM_DATA_FROM_L3MISS */ 336}; 337 338/* 339 * This could be made more efficient with a binary search on 340 * a presorted list, if necessary 341 */ 342static int find_alternatives_list(u64 event) 343{ 344 int i, j; 345 unsigned int alt; 346 347 for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) { 348 if (event < event_alternatives[i][0]) 349 return -1; 350 for (j = 0; j < MAX_ALT; ++j) { 351 alt = event_alternatives[i][j]; 352 if (!alt || event < alt) 353 break; 354 if (event == alt) 355 return i; 356 } 357 } 358 return -1; 359} 360 361static int p6_get_alternatives(u64 event, unsigned int flags, u64 alt[]) 362{ 363 int i, j, nlim; 364 unsigned int psel, pmc; 365 unsigned int nalt = 1; 366 u64 aevent; 367 368 alt[0] = event; 369 nlim = p6_limited_pmc_event(event); 370 371 /* check the alternatives table */ 372 i = find_alternatives_list(event); 373 if (i >= 0) { 374 /* copy out alternatives from list */ 375 for (j = 0; j < MAX_ALT; ++j) { 376 aevent = event_alternatives[i][j]; 377 if (!aevent) 378 break; 379 if (aevent != event) 380 alt[nalt++] = aevent; 381 nlim += p6_limited_pmc_event(aevent); 382 } 383 384 } else { 385 /* Check for alternative ways of computing sum events */ 386 /* PMCSEL 0x32 counter N == PMCSEL 0x34 counter 5-N */ 387 psel = event & (PM_PMCSEL_MSK & ~1); /* ignore edge bit */ 388 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; 389 if (pmc && (psel == 0x32 || psel == 0x34)) 390 alt[nalt++] = ((event ^ 0x6) & ~PM_PMC_MSKS) | 391 ((5 - pmc) << PM_PMC_SH); 392 393 /* PMCSEL 0x38 counter N == PMCSEL 0x3a counter N+/-2 */ 394 if (pmc && (psel == 0x38 || psel == 0x3a)) 395 alt[nalt++] = ((event ^ 0x2) & ~PM_PMC_MSKS) | 396 ((pmc > 2? pmc - 2: pmc + 2) << PM_PMC_SH); 397 } 398 399 if (flags & PPMU_ONLY_COUNT_RUN) { 400 /* 401 * We're only counting in RUN state, 402 * so PM_CYC is equivalent to PM_RUN_CYC, 403 * PM_INST_CMPL === PM_RUN_INST_CMPL, PM_PURR === PM_RUN_PURR. 404 * This doesn't include alternatives that don't provide 405 * any extra flexibility in assigning PMCs (e.g. 406 * 0x10000a for PM_RUN_CYC vs. 0x1e for PM_CYC). 407 * Note that even with these additional alternatives 408 * we never end up with more than 4 alternatives for any event. 409 */ 410 j = nalt; 411 for (i = 0; i < nalt; ++i) { 412 switch (alt[i]) { 413 case 0x1e: /* PM_CYC */ 414 alt[j++] = 0x600005; /* PM_RUN_CYC */ 415 ++nlim; 416 break; 417 case 0x10000a: /* PM_RUN_CYC */ 418 alt[j++] = 0x1e; /* PM_CYC */ 419 break; 420 case 2: /* PM_INST_CMPL */ 421 alt[j++] = 0x500009; /* PM_RUN_INST_CMPL */ 422 ++nlim; 423 break; 424 case 0x500009: /* PM_RUN_INST_CMPL */ 425 alt[j++] = 2; /* PM_INST_CMPL */ 426 break; 427 case 0x10000e: /* PM_PURR */ 428 alt[j++] = 0x4000f4; /* PM_RUN_PURR */ 429 break; 430 case 0x4000f4: /* PM_RUN_PURR */ 431 alt[j++] = 0x10000e; /* PM_PURR */ 432 break; 433 } 434 } 435 nalt = j; 436 } 437 438 if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) { 439 /* remove the limited PMC events */ 440 j = 0; 441 for (i = 0; i < nalt; ++i) { 442 if (!p6_limited_pmc_event(alt[i])) { 443 alt[j] = alt[i]; 444 ++j; 445 } 446 } 447 nalt = j; 448 } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) { 449 /* remove all but the limited PMC events */ 450 j = 0; 451 for (i = 0; i < nalt; ++i) { 452 if (p6_limited_pmc_event(alt[i])) { 453 alt[j] = alt[i]; 454 ++j; 455 } 456 } 457 nalt = j; 458 } 459 460 return nalt; 461} 462 463static void p6_disable_pmc(unsigned int pmc, struct mmcr_regs *mmcr) 464{ 465 /* Set PMCxSEL to 0 to disable PMCx */ 466 if (pmc <= 3) 467 mmcr->mmcr1 &= ~(0xffUL << MMCR1_PMCSEL_SH(pmc)); 468} 469 470static int power6_generic_events[] = { 471 [PERF_COUNT_HW_CPU_CYCLES] = 0x1e, 472 [PERF_COUNT_HW_INSTRUCTIONS] = 2, 473 [PERF_COUNT_HW_CACHE_REFERENCES] = 0x280030, /* LD_REF_L1 */ 474 [PERF_COUNT_HW_CACHE_MISSES] = 0x30000c, /* LD_MISS_L1 */ 475 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x410a0, /* BR_PRED */ 476 [PERF_COUNT_HW_BRANCH_MISSES] = 0x400052, /* BR_MPRED */ 477}; 478 479#define C(x) PERF_COUNT_HW_CACHE_##x 480 481/* 482 * Table of generalized cache-related events. 483 * 0 means not supported, -1 means nonsensical, other values 484 * are event codes. 485 * The "DTLB" and "ITLB" events relate to the DERAT and IERAT. 486 */ 487static u64 power6_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { 488 [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */ 489 [C(OP_READ)] = { 0x280030, 0x80080 }, 490 [C(OP_WRITE)] = { 0x180032, 0x80088 }, 491 [C(OP_PREFETCH)] = { 0x810a4, 0 }, 492 }, 493 [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */ 494 [C(OP_READ)] = { 0, 0x100056 }, 495 [C(OP_WRITE)] = { -1, -1 }, 496 [C(OP_PREFETCH)] = { 0x4008c, 0 }, 497 }, 498 [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */ 499 [C(OP_READ)] = { 0x150730, 0x250532 }, 500 [C(OP_WRITE)] = { 0x250432, 0x150432 }, 501 [C(OP_PREFETCH)] = { 0x810a6, 0 }, 502 }, 503 [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */ 504 [C(OP_READ)] = { 0, 0x20000e }, 505 [C(OP_WRITE)] = { -1, -1 }, 506 [C(OP_PREFETCH)] = { -1, -1 }, 507 }, 508 [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */ 509 [C(OP_READ)] = { 0, 0x420ce }, 510 [C(OP_WRITE)] = { -1, -1 }, 511 [C(OP_PREFETCH)] = { -1, -1 }, 512 }, 513 [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */ 514 [C(OP_READ)] = { 0x430e6, 0x400052 }, 515 [C(OP_WRITE)] = { -1, -1 }, 516 [C(OP_PREFETCH)] = { -1, -1 }, 517 }, 518 [C(NODE)] = { /* RESULT_ACCESS RESULT_MISS */ 519 [C(OP_READ)] = { -1, -1 }, 520 [C(OP_WRITE)] = { -1, -1 }, 521 [C(OP_PREFETCH)] = { -1, -1 }, 522 }, 523}; 524 525static struct power_pmu power6_pmu = { 526 .name = "POWER6", 527 .n_counter = 6, 528 .max_alternatives = MAX_ALT, 529 .add_fields = 0x1555, 530 .test_adder = 0x3000, 531 .compute_mmcr = p6_compute_mmcr, 532 .get_constraint = p6_get_constraint, 533 .get_alternatives = p6_get_alternatives, 534 .disable_pmc = p6_disable_pmc, 535 .limited_pmc_event = p6_limited_pmc_event, 536 .flags = PPMU_LIMITED_PMC5_6 | PPMU_ALT_SIPR, 537 .n_generic = ARRAY_SIZE(power6_generic_events), 538 .generic_events = power6_generic_events, 539 .cache_events = &power6_cache_events, 540}; 541 542int __init init_power6_pmu(void) 543{ 544 unsigned int pvr = mfspr(SPRN_PVR); 545 546 if (PVR_VER(pvr) != PVR_POWER6) 547 return -ENODEV; 548 549 return register_power_pmu(&power6_pmu); 550} 551