root/arch/powerpc/perf/power5+-pmu.c

DEFINITIONS

1. power5p_get_constraint
2. power5p_limited_pmc_event
3. find_alternative
4. find_alternative_bdecode
5. power5p_get_alternatives
6. power5p_marked_instr_event
7. power5p_compute_mmcr
8. power5p_disable_pmc
9. init_power5p_pmu

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Performance counter support for POWER5+/++ (not POWER5) processors.
   4  *
   5  * Copyright 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 POWER5+ (POWER5 GS) and POWER5++ (POWER5 GS DD3)
  15  */
  16 #define PM_PMC_SH       20      /* PMC number (1-based) for direct events */
  17 #define PM_PMC_MSK      0xf
  18 #define PM_PMC_MSKS     (PM_PMC_MSK << PM_PMC_SH)
  19 #define PM_UNIT_SH      16      /* TTMMUX number and setting - unit select */
  20 #define PM_UNIT_MSK     0xf
  21 #define PM_BYTE_SH      12      /* Byte number of event bus to use */
  22 #define PM_BYTE_MSK     7
  23 #define PM_GRS_SH       8       /* Storage subsystem mux select */
  24 #define PM_GRS_MSK      7
  25 #define PM_BUSEVENT_MSK 0x80    /* Set if event uses event bus */
  26 #define PM_PMCSEL_MSK   0x7f
  27 
  28 /* Values in PM_UNIT field */
  29 #define PM_FPU          0
  30 #define PM_ISU0         1
  31 #define PM_IFU          2
  32 #define PM_ISU1         3
  33 #define PM_IDU          4
  34 #define PM_ISU0_ALT     6
  35 #define PM_GRS          7
  36 #define PM_LSU0         8
  37 #define PM_LSU1         0xc
  38 #define PM_LASTUNIT     0xc
  39 
  40 /*
  41  * Bits in MMCR1 for POWER5+
  42  */
  43 #define MMCR1_TTM0SEL_SH        62
  44 #define MMCR1_TTM1SEL_SH        60
  45 #define MMCR1_TTM2SEL_SH        58
  46 #define MMCR1_TTM3SEL_SH        56
  47 #define MMCR1_TTMSEL_MSK        3
  48 #define MMCR1_TD_CP_DBG0SEL_SH  54
  49 #define MMCR1_TD_CP_DBG1SEL_SH  52
  50 #define MMCR1_TD_CP_DBG2SEL_SH  50
  51 #define MMCR1_TD_CP_DBG3SEL_SH  48
  52 #define MMCR1_GRS_L2SEL_SH      46
  53 #define MMCR1_GRS_L2SEL_MSK     3
  54 #define MMCR1_GRS_L3SEL_SH      44
  55 #define MMCR1_GRS_L3SEL_MSK     3
  56 #define MMCR1_GRS_MCSEL_SH      41
  57 #define MMCR1_GRS_MCSEL_MSK     7
  58 #define MMCR1_GRS_FABSEL_SH     39
  59 #define MMCR1_GRS_FABSEL_MSK    3
  60 #define MMCR1_PMC1_ADDER_SEL_SH 35
  61 #define MMCR1_PMC2_ADDER_SEL_SH 34
  62 #define MMCR1_PMC3_ADDER_SEL_SH 33
  63 #define MMCR1_PMC4_ADDER_SEL_SH 32
  64 #define MMCR1_PMC1SEL_SH        25
  65 #define MMCR1_PMC2SEL_SH        17
  66 #define MMCR1_PMC3SEL_SH        9
  67 #define MMCR1_PMC4SEL_SH        1
  68 #define MMCR1_PMCSEL_SH(n)      (MMCR1_PMC1SEL_SH - (n) * 8)
  69 #define MMCR1_PMCSEL_MSK        0x7f
  70 
  71 /*
  72  * Layout of constraint bits:
  73  * 6666555555555544444444443333333333222222222211111111110000000000
  74  * 3210987654321098765432109876543210987654321098765432109876543210
  75  *             [  ><><>< ><> <><>[  >  <  ><  ><  ><  ><><><><><><>
  76  *             NC  G0G1G2 G3 T0T1 UC    B0  B1  B2  B3 P6P5P4P3P2P1
  77  *
  78  * NC - number of counters
  79  *     51: NC error 0x0008_0000_0000_0000
  80  *     48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
  81  *
  82  * G0..G3 - GRS mux constraints
  83  *     46-47: GRS_L2SEL value
  84  *     44-45: GRS_L3SEL value
  85  *     41-44: GRS_MCSEL value
  86  *     39-40: GRS_FABSEL value
  87  *      Note that these match up with their bit positions in MMCR1
  88  *
  89  * T0 - TTM0 constraint
  90  *     36-37: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0x30_0000_0000
  91  *
  92  * T1 - TTM1 constraint
  93  *     34-35: TTM1SEL value (0=IDU, 3=GRS) 0x0c_0000_0000
  94  *
  95  * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
  96  *     33: UC3 error 0x02_0000_0000
  97  *     32: FPU|IFU|ISU1 events needed 0x01_0000_0000
  98  *     31: ISU0 events needed 0x01_8000_0000
  99  *     30: IDU|GRS events needed 0x00_4000_0000
 100  *
 101  * B0
 102  *     24-27: Byte 0 event source 0x0f00_0000
 103  *            Encoding as for the event code
 104  *
 105  * B1, B2, B3
 106  *     20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
 107  *
 108  * P6
 109  *     11: P6 error 0x800
 110  *     10-11: Count of events needing PMC6
 111  *
 112  * P1..P5
 113  *     0-9: Count of events needing PMC1..PMC5
 114  */
 115 
 116 static const int grsel_shift[8] = {
 117         MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
 118         MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
 119         MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
 120 };
 121 
 122 /* Masks and values for using events from the various units */
 123 static unsigned long unit_cons[PM_LASTUNIT+1][2] = {
 124         [PM_FPU] =   { 0x3200000000ul, 0x0100000000ul },
 125         [PM_ISU0] =  { 0x0200000000ul, 0x0080000000ul },
 126         [PM_ISU1] =  { 0x3200000000ul, 0x3100000000ul },
 127         [PM_IFU] =   { 0x3200000000ul, 0x2100000000ul },
 128         [PM_IDU] =   { 0x0e00000000ul, 0x0040000000ul },
 129         [PM_GRS] =   { 0x0e00000000ul, 0x0c40000000ul },
 130 };
 131 
 132 static int power5p_get_constraint(u64 event, unsigned long *maskp,
 133                                   unsigned long *valp)
 134 {
 135         int pmc, byte, unit, sh;
 136         int bit, fmask;
 137         unsigned long mask = 0, value = 0;
 138 
 139         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 140         if (pmc) {
 141                 if (pmc > 6)
 142                         return -1;
 143                 sh = (pmc - 1) * 2;
 144                 mask |= 2 << sh;
 145                 value |= 1 << sh;
 146                 if (pmc >= 5 && !(event == 0x500009 || event == 0x600005))
 147                         return -1;
 148         }
 149         if (event & PM_BUSEVENT_MSK) {
 150                 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
 151                 if (unit > PM_LASTUNIT)
 152                         return -1;
 153                 if (unit == PM_ISU0_ALT)
 154                         unit = PM_ISU0;
 155                 mask |= unit_cons[unit][0];
 156                 value |= unit_cons[unit][1];
 157                 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
 158                 if (byte >= 4) {
 159                         if (unit != PM_LSU1)
 160                                 return -1;
 161                         /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
 162                         ++unit;
 163                         byte &= 3;
 164                 }
 165                 if (unit == PM_GRS) {
 166                         bit = event & 7;
 167                         fmask = (bit == 6)? 7: 3;
 168                         sh = grsel_shift[bit];
 169                         mask |= (unsigned long)fmask << sh;
 170                         value |= (unsigned long)((event >> PM_GRS_SH) & fmask)
 171                                 << sh;
 172                 }
 173                 /* Set byte lane select field */
 174                 mask  |= 0xfUL << (24 - 4 * byte);
 175                 value |= (unsigned long)unit << (24 - 4 * byte);
 176         }
 177         if (pmc < 5) {
 178                 /* need a counter from PMC1-4 set */
 179                 mask  |= 0x8000000000000ul;
 180                 value |= 0x1000000000000ul;
 181         }
 182         *maskp = mask;
 183         *valp = value;
 184         return 0;
 185 }
 186 
 187 static int power5p_limited_pmc_event(u64 event)
 188 {
 189         int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 190 
 191         return pmc == 5 || pmc == 6;
 192 }
 193 
 194 #define MAX_ALT 3       /* at most 3 alternatives for any event */
 195 
 196 static const unsigned int event_alternatives[][MAX_ALT] = {
 197         { 0x100c0,  0x40001f },                 /* PM_GCT_FULL_CYC */
 198         { 0x120e4,  0x400002 },                 /* PM_GRP_DISP_REJECT */
 199         { 0x230e2,  0x323087 },                 /* PM_BR_PRED_CR */
 200         { 0x230e3,  0x223087, 0x3230a0 },       /* PM_BR_PRED_TA */
 201         { 0x410c7,  0x441084 },                 /* PM_THRD_L2MISS_BOTH_CYC */
 202         { 0x800c4,  0xc20e0 },                  /* PM_DTLB_MISS */
 203         { 0xc50c6,  0xc60e0 },                  /* PM_MRK_DTLB_MISS */
 204         { 0x100005, 0x600005 },                 /* PM_RUN_CYC */
 205         { 0x100009, 0x200009 },                 /* PM_INST_CMPL */
 206         { 0x200015, 0x300015 },                 /* PM_LSU_LMQ_SRQ_EMPTY_CYC */
 207         { 0x300009, 0x400009 },                 /* PM_INST_DISP */
 208 };
 209 
 210 /*
 211  * Scan the alternatives table for a match and return the
 212  * index into the alternatives table if found, else -1.
 213  */
 214 static int find_alternative(unsigned int event)
 215 {
 216         int i, j;
 217 
 218         for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
 219                 if (event < event_alternatives[i][0])
 220                         break;
 221                 for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
 222                         if (event == event_alternatives[i][j])
 223                                 return i;
 224         }
 225         return -1;
 226 }
 227 
 228 static const unsigned char bytedecode_alternatives[4][4] = {
 229         /* PMC 1 */     { 0x21, 0x23, 0x25, 0x27 },
 230         /* PMC 2 */     { 0x07, 0x17, 0x0e, 0x1e },
 231         /* PMC 3 */     { 0x20, 0x22, 0x24, 0x26 },
 232         /* PMC 4 */     { 0x07, 0x17, 0x0e, 0x1e }
 233 };
 234 
 235 /*
 236  * Some direct events for decodes of event bus byte 3 have alternative
 237  * PMCSEL values on other counters.  This returns the alternative
 238  * event code for those that do, or -1 otherwise.  This also handles
 239  * alternative PCMSEL values for add events.
 240  */
 241 static s64 find_alternative_bdecode(u64 event)
 242 {
 243         int pmc, altpmc, pp, j;
 244 
 245         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 246         if (pmc == 0 || pmc > 4)
 247                 return -1;
 248         altpmc = 5 - pmc;       /* 1 <-> 4, 2 <-> 3 */
 249         pp = event & PM_PMCSEL_MSK;
 250         for (j = 0; j < 4; ++j) {
 251                 if (bytedecode_alternatives[pmc - 1][j] == pp) {
 252                         return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
 253                                 (altpmc << PM_PMC_SH) |
 254                                 bytedecode_alternatives[altpmc - 1][j];
 255                 }
 256         }
 257 
 258         /* new decode alternatives for power5+ */
 259         if (pmc == 1 && (pp == 0x0d || pp == 0x0e))
 260                 return event + (2 << PM_PMC_SH) + (0x2e - 0x0d);
 261         if (pmc == 3 && (pp == 0x2e || pp == 0x2f))
 262                 return event - (2 << PM_PMC_SH) - (0x2e - 0x0d);
 263 
 264         /* alternative add event encodings */
 265         if (pp == 0x10 || pp == 0x28)
 266                 return ((event ^ (0x10 ^ 0x28)) & ~PM_PMC_MSKS) |
 267                         (altpmc << PM_PMC_SH);
 268 
 269         return -1;
 270 }
 271 
 272 static int power5p_get_alternatives(u64 event, unsigned int flags, u64 alt[])
 273 {
 274         int i, j, nalt = 1;
 275         int nlim;
 276         s64 ae;
 277 
 278         alt[0] = event;
 279         nalt = 1;
 280         nlim = power5p_limited_pmc_event(event);
 281         i = find_alternative(event);
 282         if (i >= 0) {
 283                 for (j = 0; j < MAX_ALT; ++j) {
 284                         ae = event_alternatives[i][j];
 285                         if (ae && ae != event)
 286                                 alt[nalt++] = ae;
 287                         nlim += power5p_limited_pmc_event(ae);
 288                 }
 289         } else {
 290                 ae = find_alternative_bdecode(event);
 291                 if (ae > 0)
 292                         alt[nalt++] = ae;
 293         }
 294 
 295         if (flags & PPMU_ONLY_COUNT_RUN) {
 296                 /*
 297                  * We're only counting in RUN state,
 298                  * so PM_CYC is equivalent to PM_RUN_CYC
 299                  * and PM_INST_CMPL === PM_RUN_INST_CMPL.
 300                  * This doesn't include alternatives that don't provide
 301                  * any extra flexibility in assigning PMCs (e.g.
 302                  * 0x100005 for PM_RUN_CYC vs. 0xf for PM_CYC).
 303                  * Note that even with these additional alternatives
 304                  * we never end up with more than 3 alternatives for any event.
 305                  */
 306                 j = nalt;
 307                 for (i = 0; i < nalt; ++i) {
 308                         switch (alt[i]) {
 309                         case 0xf:       /* PM_CYC */
 310                                 alt[j++] = 0x600005;    /* PM_RUN_CYC */
 311                                 ++nlim;
 312                                 break;
 313                         case 0x600005:  /* PM_RUN_CYC */
 314                                 alt[j++] = 0xf;
 315                                 break;
 316                         case 0x100009:  /* PM_INST_CMPL */
 317                                 alt[j++] = 0x500009;    /* PM_RUN_INST_CMPL */
 318                                 ++nlim;
 319                                 break;
 320                         case 0x500009:  /* PM_RUN_INST_CMPL */
 321                                 alt[j++] = 0x100009;    /* PM_INST_CMPL */
 322                                 alt[j++] = 0x200009;
 323                                 break;
 324                         }
 325                 }
 326                 nalt = j;
 327         }
 328 
 329         if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) {
 330                 /* remove the limited PMC events */
 331                 j = 0;
 332                 for (i = 0; i < nalt; ++i) {
 333                         if (!power5p_limited_pmc_event(alt[i])) {
 334                                 alt[j] = alt[i];
 335                                 ++j;
 336                         }
 337                 }
 338                 nalt = j;
 339         } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) {
 340                 /* remove all but the limited PMC events */
 341                 j = 0;
 342                 for (i = 0; i < nalt; ++i) {
 343                         if (power5p_limited_pmc_event(alt[i])) {
 344                                 alt[j] = alt[i];
 345                                 ++j;
 346                         }
 347                 }
 348                 nalt = j;
 349         }
 350 
 351         return nalt;
 352 }
 353 
 354 /*
 355  * Map of which direct events on which PMCs are marked instruction events.
 356  * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
 357  * Bit 0 is set if it is marked for all PMCs.
 358  * The 0x80 bit indicates a byte decode PMCSEL value.
 359  */
 360 static unsigned char direct_event_is_marked[0x28] = {
 361         0,      /* 00 */
 362         0x1f,   /* 01 PM_IOPS_CMPL */
 363         0x2,    /* 02 PM_MRK_GRP_DISP */
 364         0xe,    /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
 365         0,      /* 04 */
 366         0x1c,   /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
 367         0x80,   /* 06 */
 368         0x80,   /* 07 */
 369         0, 0, 0,/* 08 - 0a */
 370         0x18,   /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
 371         0,      /* 0c */
 372         0x80,   /* 0d */
 373         0x80,   /* 0e */
 374         0,      /* 0f */
 375         0,      /* 10 */
 376         0x14,   /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
 377         0,      /* 12 */
 378         0x10,   /* 13 PM_MRK_GRP_CMPL */
 379         0x1f,   /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
 380         0x2,    /* 15 PM_MRK_GRP_ISSUED */
 381         0x80,   /* 16 */
 382         0x80,   /* 17 */
 383         0, 0, 0, 0, 0,
 384         0x80,   /* 1d */
 385         0x80,   /* 1e */
 386         0,      /* 1f */
 387         0x80,   /* 20 */
 388         0x80,   /* 21 */
 389         0x80,   /* 22 */
 390         0x80,   /* 23 */
 391         0x80,   /* 24 */
 392         0x80,   /* 25 */
 393         0x80,   /* 26 */
 394         0x80,   /* 27 */
 395 };
 396 
 397 /*
 398  * Returns 1 if event counts things relating to marked instructions
 399  * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
 400  */
 401 static int power5p_marked_instr_event(u64 event)
 402 {
 403         int pmc, psel;
 404         int bit, byte, unit;
 405         u32 mask;
 406 
 407         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 408         psel = event & PM_PMCSEL_MSK;
 409         if (pmc >= 5)
 410                 return 0;
 411 
 412         bit = -1;
 413         if (psel < sizeof(direct_event_is_marked)) {
 414                 if (direct_event_is_marked[psel] & (1 << pmc))
 415                         return 1;
 416                 if (direct_event_is_marked[psel] & 0x80)
 417                         bit = 4;
 418                 else if (psel == 0x08)
 419                         bit = pmc - 1;
 420                 else if (psel == 0x10)
 421                         bit = 4 - pmc;
 422                 else if (psel == 0x1b && (pmc == 1 || pmc == 3))
 423                         bit = 4;
 424         } else if ((psel & 0x48) == 0x40) {
 425                 bit = psel & 7;
 426         } else if (psel == 0x28) {
 427                 bit = pmc - 1;
 428         } else if (pmc == 3 && (psel == 0x2e || psel == 0x2f)) {
 429                 bit = 4;
 430         }
 431 
 432         if (!(event & PM_BUSEVENT_MSK) || bit == -1)
 433                 return 0;
 434 
 435         byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
 436         unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
 437         if (unit == PM_LSU0) {
 438                 /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
 439                 mask = 0x5dff00;
 440         } else if (unit == PM_LSU1 && byte >= 4) {
 441                 byte -= 4;
 442                 /* byte 5 bits 6-7, byte 6 bits 0,4, byte 7 bits 0-4,6 */
 443                 mask = 0x5f11c000;
 444         } else
 445                 return 0;
 446 
 447         return (mask >> (byte * 8 + bit)) & 1;
 448 }
 449 
 450 static int power5p_compute_mmcr(u64 event[], int n_ev,
 451                                 unsigned int hwc[], unsigned long mmcr[], struct perf_event *pevents[])
 452 {
 453         unsigned long mmcr1 = 0;
 454         unsigned long mmcra = 0;
 455         unsigned int pmc, unit, byte, psel;
 456         unsigned int ttm;
 457         int i, isbus, bit, grsel;
 458         unsigned int pmc_inuse = 0;
 459         unsigned char busbyte[4];
 460         unsigned char unituse[16];
 461         int ttmuse;
 462 
 463         if (n_ev > 6)
 464                 return -1;
 465 
 466         /* First pass to count resource use */
 467         memset(busbyte, 0, sizeof(busbyte));
 468         memset(unituse, 0, sizeof(unituse));
 469         for (i = 0; i < n_ev; ++i) {
 470                 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
 471                 if (pmc) {
 472                         if (pmc > 6)
 473                                 return -1;
 474                         if (pmc_inuse & (1 << (pmc - 1)))
 475                                 return -1;
 476                         pmc_inuse |= 1 << (pmc - 1);
 477                 }
 478                 if (event[i] & PM_BUSEVENT_MSK) {
 479                         unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
 480                         byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
 481                         if (unit > PM_LASTUNIT)
 482                                 return -1;
 483                         if (unit == PM_ISU0_ALT)
 484                                 unit = PM_ISU0;
 485                         if (byte >= 4) {
 486                                 if (unit != PM_LSU1)
 487                                         return -1;
 488                                 ++unit;
 489                                 byte &= 3;
 490                         }
 491                         if (busbyte[byte] && busbyte[byte] != unit)
 492                                 return -1;
 493                         busbyte[byte] = unit;
 494                         unituse[unit] = 1;
 495                 }
 496         }
 497 
 498         /*
 499          * Assign resources and set multiplexer selects.
 500          *
 501          * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
 502          * choice we have to deal with.
 503          */
 504         if (unituse[PM_ISU0] &
 505             (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
 506                 unituse[PM_ISU0_ALT] = 1;       /* move ISU to TTM1 */
 507                 unituse[PM_ISU0] = 0;
 508         }
 509         /* Set TTM[01]SEL fields. */
 510         ttmuse = 0;
 511         for (i = PM_FPU; i <= PM_ISU1; ++i) {
 512                 if (!unituse[i])
 513                         continue;
 514                 if (ttmuse++)
 515                         return -1;
 516                 mmcr1 |= (unsigned long)i << MMCR1_TTM0SEL_SH;
 517         }
 518         ttmuse = 0;
 519         for (; i <= PM_GRS; ++i) {
 520                 if (!unituse[i])
 521                         continue;
 522                 if (ttmuse++)
 523                         return -1;
 524                 mmcr1 |= (unsigned long)(i & 3) << MMCR1_TTM1SEL_SH;
 525         }
 526         if (ttmuse > 1)
 527                 return -1;
 528 
 529         /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
 530         for (byte = 0; byte < 4; ++byte) {
 531                 unit = busbyte[byte];
 532                 if (!unit)
 533                         continue;
 534                 if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
 535                         /* get ISU0 through TTM1 rather than TTM0 */
 536                         unit = PM_ISU0_ALT;
 537                 } else if (unit == PM_LSU1 + 1) {
 538                         /* select lower word of LSU1 for this byte */
 539                         mmcr1 |= 1ul << (MMCR1_TTM3SEL_SH + 3 - byte);
 540                 }
 541                 ttm = unit >> 2;
 542                 mmcr1 |= (unsigned long)ttm
 543                         << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
 544         }
 545 
 546         /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
 547         for (i = 0; i < n_ev; ++i) {
 548                 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
 549                 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
 550                 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
 551                 psel = event[i] & PM_PMCSEL_MSK;
 552                 isbus = event[i] & PM_BUSEVENT_MSK;
 553                 if (!pmc) {
 554                         /* Bus event or any-PMC direct event */
 555                         for (pmc = 0; pmc < 4; ++pmc) {
 556                                 if (!(pmc_inuse & (1 << pmc)))
 557                                         break;
 558                         }
 559                         if (pmc >= 4)
 560                                 return -1;
 561                         pmc_inuse |= 1 << pmc;
 562                 } else if (pmc <= 4) {
 563                         /* Direct event */
 564                         --pmc;
 565                         if (isbus && (byte & 2) &&
 566                             (psel == 8 || psel == 0x10 || psel == 0x28))
 567                                 /* add events on higher-numbered bus */
 568                                 mmcr1 |= 1ul << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
 569                 } else {
 570                         /* Instructions or run cycles on PMC5/6 */
 571                         --pmc;
 572                 }
 573                 if (isbus && unit == PM_GRS) {
 574                         bit = psel & 7;
 575                         grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
 576                         mmcr1 |= (unsigned long)grsel << grsel_shift[bit];
 577                 }
 578                 if (power5p_marked_instr_event(event[i]))
 579                         mmcra |= MMCRA_SAMPLE_ENABLE;
 580                 if ((psel & 0x58) == 0x40 && (byte & 1) != ((pmc >> 1) & 1))
 581                         /* select alternate byte lane */
 582                         psel |= 0x10;
 583                 if (pmc <= 3)
 584                         mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
 585                 hwc[i] = pmc;
 586         }
 587 
 588         /* Return MMCRx values */
 589         mmcr[0] = 0;
 590         if (pmc_inuse & 1)
 591                 mmcr[0] = MMCR0_PMC1CE;
 592         if (pmc_inuse & 0x3e)
 593                 mmcr[0] |= MMCR0_PMCjCE;
 594         mmcr[1] = mmcr1;
 595         mmcr[2] = mmcra;
 596         return 0;
 597 }
 598 
 599 static void power5p_disable_pmc(unsigned int pmc, unsigned long mmcr[])
 600 {
 601         if (pmc <= 3)
 602                 mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
 603 }
 604 
 605 static int power5p_generic_events[] = {
 606         [PERF_COUNT_HW_CPU_CYCLES]              = 0xf,
 607         [PERF_COUNT_HW_INSTRUCTIONS]            = 0x100009,
 608         [PERF_COUNT_HW_CACHE_REFERENCES]        = 0x1c10a8, /* LD_REF_L1 */
 609         [PERF_COUNT_HW_CACHE_MISSES]            = 0x3c1088, /* LD_MISS_L1 */
 610         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = 0x230e4,  /* BR_ISSUED */
 611         [PERF_COUNT_HW_BRANCH_MISSES]           = 0x230e5,  /* BR_MPRED_CR */
 612 };
 613 
 614 #define C(x)    PERF_COUNT_HW_CACHE_##x
 615 
 616 /*
 617  * Table of generalized cache-related events.
 618  * 0 means not supported, -1 means nonsensical, other values
 619  * are event codes.
 620  */
 621 static int power5p_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
 622         [C(L1D)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 623                 [C(OP_READ)] = {        0x1c10a8,       0x3c1088        },
 624                 [C(OP_WRITE)] = {       0x2c10a8,       0xc10c3         },
 625                 [C(OP_PREFETCH)] = {    0xc70e7,        -1              },
 626         },
 627         [C(L1I)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 628                 [C(OP_READ)] = {        0,              0               },
 629                 [C(OP_WRITE)] = {       -1,             -1              },
 630                 [C(OP_PREFETCH)] = {    0,              0               },
 631         },
 632         [C(LL)] = {             /*      RESULT_ACCESS   RESULT_MISS */
 633                 [C(OP_READ)] = {        0,              0               },
 634                 [C(OP_WRITE)] = {       0,              0               },
 635                 [C(OP_PREFETCH)] = {    0xc50c3,        0               },
 636         },
 637         [C(DTLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 638                 [C(OP_READ)] = {        0xc20e4,        0x800c4         },
 639                 [C(OP_WRITE)] = {       -1,             -1              },
 640                 [C(OP_PREFETCH)] = {    -1,             -1              },
 641         },
 642         [C(ITLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 643                 [C(OP_READ)] = {        0,              0x800c0         },
 644                 [C(OP_WRITE)] = {       -1,             -1              },
 645                 [C(OP_PREFETCH)] = {    -1,             -1              },
 646         },
 647         [C(BPU)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 648                 [C(OP_READ)] = {        0x230e4,        0x230e5         },
 649                 [C(OP_WRITE)] = {       -1,             -1              },
 650                 [C(OP_PREFETCH)] = {    -1,             -1              },
 651         },
 652         [C(NODE)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 653                 [C(OP_READ)] = {        -1,             -1              },
 654                 [C(OP_WRITE)] = {       -1,             -1              },
 655                 [C(OP_PREFETCH)] = {    -1,             -1              },
 656         },
 657 };
 658 
 659 static struct power_pmu power5p_pmu = {
 660         .name                   = "POWER5+/++",
 661         .n_counter              = 6,
 662         .max_alternatives       = MAX_ALT,
 663         .add_fields             = 0x7000000000055ul,
 664         .test_adder             = 0x3000040000000ul,
 665         .compute_mmcr           = power5p_compute_mmcr,
 666         .get_constraint         = power5p_get_constraint,
 667         .get_alternatives       = power5p_get_alternatives,
 668         .disable_pmc            = power5p_disable_pmc,
 669         .limited_pmc_event      = power5p_limited_pmc_event,
 670         .flags                  = PPMU_LIMITED_PMC5_6 | PPMU_HAS_SSLOT,
 671         .n_generic              = ARRAY_SIZE(power5p_generic_events),
 672         .generic_events         = power5p_generic_events,
 673         .cache_events           = &power5p_cache_events,
 674 };
 675 
 676 int init_power5p_pmu(void)
 677 {
 678         if (!cur_cpu_spec->oprofile_cpu_type ||
 679             (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5+")
 680              && strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5++")))
 681                 return -ENODEV;
 682 
 683         return register_power_pmu(&power5p_pmu);
 684 }