arch/powerpc/perf/generic-compat-pmu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // Copyright 2019 Madhavan Srinivasan, IBM Corporation.
   4
   5 #define pr_fmt(fmt)     "generic-compat-pmu: " fmt
   6
   7 #include "isa207-common.h"
   8
   9 /*
  10  * Raw event encoding:
  11  *
  12  *        60        56        52        48        44        40        36        32
  13  * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
  14  *
  15  *        28        24        20        16        12         8         4         0
  16  * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
  17  *                                 [ pmc ]   [unit ]   [ ]   m   [    pmcxsel    ]
  18  *                                                     |     |
  19  *                                                     |     *- mark
  20  *                                                     |
  21  *                                                     |
  22  *                                                     *- combine
  23  *
  24  * Below uses IBM bit numbering.
  25  *
  26  * MMCR1[x:y] = unit    (PMCxUNIT)
  27  * MMCR1[24]   = pmc1combine[0]
  28  * MMCR1[25]   = pmc1combine[1]
  29  * MMCR1[26]   = pmc2combine[0]
  30  * MMCR1[27]   = pmc2combine[1]
  31  * MMCR1[28]   = pmc3combine[0]
  32  * MMCR1[29]   = pmc3combine[1]
  33  * MMCR1[30]   = pmc4combine[0]
  34  * MMCR1[31]   = pmc4combine[1]
  35  *
  36  */
  37
  38 /*
  39  * Some power9 event codes.
  40  */
  41 #define EVENT(_name, _code)     _name = _code,
  42
  43 enum {
  44 EVENT(PM_CYC,                                   0x0001e)
  45 EVENT(PM_INST_CMPL,                             0x00002)
  46 };
  47
  48 #undef EVENT
  49
  50 GENERIC_EVENT_ATTR(cpu-cycles,                  PM_CYC);
  51 GENERIC_EVENT_ATTR(instructions,                PM_INST_CMPL);
  52
  53 static struct attribute *generic_compat_events_attr[] = {
  54         GENERIC_EVENT_PTR(PM_CYC),
  55         GENERIC_EVENT_PTR(PM_INST_CMPL),
  56         NULL
  57 };
  58
  59 static struct attribute_group generic_compat_pmu_events_group = {
  60         .name = "events",
  61         .attrs = generic_compat_events_attr,
  62 };
  63
  64 PMU_FORMAT_ATTR(event,          "config:0-19");
  65 PMU_FORMAT_ATTR(pmcxsel,        "config:0-7");
  66 PMU_FORMAT_ATTR(mark,           "config:8");
  67 PMU_FORMAT_ATTR(combine,        "config:10-11");
  68 PMU_FORMAT_ATTR(unit,           "config:12-15");
  69 PMU_FORMAT_ATTR(pmc,            "config:16-19");
  70
  71 static struct attribute *generic_compat_pmu_format_attr[] = {
  72         &format_attr_event.attr,
  73         &format_attr_pmcxsel.attr,
  74         &format_attr_mark.attr,
  75         &format_attr_combine.attr,
  76         &format_attr_unit.attr,
  77         &format_attr_pmc.attr,
  78         NULL,
  79 };
  80
  81 static struct attribute_group generic_compat_pmu_format_group = {
  82         .name = "format",
  83         .attrs = generic_compat_pmu_format_attr,
  84 };
  85
  86 static const struct attribute_group *generic_compat_pmu_attr_groups[] = {
  87         &generic_compat_pmu_format_group,
  88         &generic_compat_pmu_events_group,
  89         NULL,
  90 };
  91
  92 static int compat_generic_events[] = {
  93         [PERF_COUNT_HW_CPU_CYCLES] =                    PM_CYC,
  94         [PERF_COUNT_HW_INSTRUCTIONS] =                  PM_INST_CMPL,
  95 };
  96
  97 #define C(x)    PERF_COUNT_HW_CACHE_##x
  98
  99 /*
 100  * Table of generalized cache-related events.
 101  * 0 means not supported, -1 means nonsensical, other values
 102  * are event codes.
 103  */
 104 static int generic_compat_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
 105         [ C(L1D) ] = {
 106                 [ C(OP_READ) ] = {
 107                         [ C(RESULT_ACCESS) ] = 0,
 108                         [ C(RESULT_MISS)   ] = 0,
 109                 },
 110                 [ C(OP_WRITE) ] = {
 111                         [ C(RESULT_ACCESS) ] = 0,
 112                         [ C(RESULT_MISS)   ] = 0,
 113                 },
 114                 [ C(OP_PREFETCH) ] = {
 115                         [ C(RESULT_ACCESS) ] = 0,
 116                         [ C(RESULT_MISS)   ] = 0,
 117                 },
 118         },
 119         [ C(L1I) ] = {
 120                 [ C(OP_READ) ] = {
 121                         [ C(RESULT_ACCESS) ] = 0,
 122                         [ C(RESULT_MISS)   ] = 0,
 123                 },
 124                 [ C(OP_WRITE) ] = {
 125                         [ C(RESULT_ACCESS) ] = 0,
 126                         [ C(RESULT_MISS)   ] = -1,
 127                 },
 128                 [ C(OP_PREFETCH) ] = {
 129                         [ C(RESULT_ACCESS) ] = 0,
 130                         [ C(RESULT_MISS)   ] = 0,
 131                 },
 132         },
 133         [ C(LL) ] = {
 134                 [ C(OP_READ) ] = {
 135                         [ C(RESULT_ACCESS) ] = 0,
 136                         [ C(RESULT_MISS)   ] = 0,
 137                 },
 138                 [ C(OP_WRITE) ] = {
 139                         [ C(RESULT_ACCESS) ] = 0,
 140                         [ C(RESULT_MISS)   ] = 0,
 141                 },
 142                 [ C(OP_PREFETCH) ] = {
 143                         [ C(RESULT_ACCESS) ] = 0,
 144                         [ C(RESULT_MISS)   ] = 0,
 145                 },
 146         },
 147         [ C(DTLB) ] = {
 148                 [ C(OP_READ) ] = {
 149                         [ C(RESULT_ACCESS) ] = 0,
 150                         [ C(RESULT_MISS)   ] = 0,
 151                 },
 152                 [ C(OP_WRITE) ] = {
 153                         [ C(RESULT_ACCESS) ] = -1,
 154                         [ C(RESULT_MISS)   ] = -1,
 155                 },
 156                 [ C(OP_PREFETCH) ] = {
 157                         [ C(RESULT_ACCESS) ] = -1,
 158                         [ C(RESULT_MISS)   ] = -1,
 159                 },
 160         },
 161         [ C(ITLB) ] = {
 162                 [ C(OP_READ) ] = {
 163                         [ C(RESULT_ACCESS) ] = 0,
 164                         [ C(RESULT_MISS)   ] = 0,
 165                 },
 166                 [ C(OP_WRITE) ] = {
 167                         [ C(RESULT_ACCESS) ] = -1,
 168                         [ C(RESULT_MISS)   ] = -1,
 169                 },
 170                 [ C(OP_PREFETCH) ] = {
 171                         [ C(RESULT_ACCESS) ] = -1,
 172                         [ C(RESULT_MISS)   ] = -1,
 173                 },
 174         },
 175         [ C(BPU) ] = {
 176                 [ C(OP_READ) ] = {
 177                         [ C(RESULT_ACCESS) ] = 0,
 178                         [ C(RESULT_MISS)   ] = 0,
 179                 },
 180                 [ C(OP_WRITE) ] = {
 181                         [ C(RESULT_ACCESS) ] = -1,
 182                         [ C(RESULT_MISS)   ] = -1,
 183                 },
 184                 [ C(OP_PREFETCH) ] = {
 185                         [ C(RESULT_ACCESS) ] = -1,
 186                         [ C(RESULT_MISS)   ] = -1,
 187                 },
 188         },
 189         [ C(NODE) ] = {
 190                 [ C(OP_READ) ] = {
 191                         [ C(RESULT_ACCESS) ] = -1,
 192                         [ C(RESULT_MISS)   ] = -1,
 193                 },
 194                 [ C(OP_WRITE) ] = {
 195                         [ C(RESULT_ACCESS) ] = -1,
 196                         [ C(RESULT_MISS)   ] = -1,
 197                 },
 198                 [ C(OP_PREFETCH) ] = {
 199                         [ C(RESULT_ACCESS) ] = -1,
 200                         [ C(RESULT_MISS)   ] = -1,
 201                 },
 202         },
 203 };
 204
 205 #undef C
 206
 207 static struct power_pmu generic_compat_pmu = {
 208         .name                   = "GENERIC_COMPAT",
 209         .n_counter              = MAX_PMU_COUNTERS,
 210         .add_fields             = ISA207_ADD_FIELDS,
 211         .test_adder             = ISA207_TEST_ADDER,
 212         .compute_mmcr           = isa207_compute_mmcr,
 213         .get_constraint         = isa207_get_constraint,
 214         .disable_pmc            = isa207_disable_pmc,
 215         .flags                  = PPMU_HAS_SIER | PPMU_ARCH_207S,
 216         .n_generic              = ARRAY_SIZE(compat_generic_events),
 217         .generic_events         = compat_generic_events,
 218         .cache_events           = &generic_compat_cache_events,
 219         .attr_groups            = generic_compat_pmu_attr_groups,
 220 };
 221
 222 int init_generic_compat_pmu(void)
 223 {
 224         int rc = 0;
 225
 226         rc = register_power_pmu(&generic_compat_pmu);
 227         if (rc)
 228                 return rc;
 229
 230         /* Tell userspace that EBB is supported */
 231         cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB;
 232
 233         return 0;
 234 }