| /* |
| * Performance counter support for POWER8 processors. |
| * |
| * Copyright 2009 Paul Mackerras, IBM Corporation. |
| * Copyright 2013 Michael Ellerman, IBM Corporation. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #define pr_fmt(fmt) "power8-pmu: " fmt |
| |
| #include "isa207-common.h" |
| |
| /* |
| * Some power8 event codes. |
| */ |
| #define EVENT(_name, _code) _name = _code, |
| |
| enum { |
| #include "power8-events-list.h" |
| }; |
| |
| #undef EVENT |
| |
| /* MMCRA IFM bits - POWER8 */ |
| #define POWER8_MMCRA_IFM1 0x0000000040000000UL |
| #define POWER8_MMCRA_IFM2 0x0000000080000000UL |
| #define POWER8_MMCRA_IFM3 0x00000000C0000000UL |
| #define POWER8_MMCRA_BHRB_MASK 0x00000000C0000000UL |
| |
| /* |
| * Raw event encoding for PowerISA v2.07 (Power8): |
| * |
| * 60 56 52 48 44 40 36 32 |
| * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | |
| * | | [ ] [ thresh_cmp ] [ thresh_ctl ] |
| * | | | | |
| * | | *- IFM (Linux) thresh start/stop OR FAB match -* |
| * | *- BHRB (Linux) |
| * *- EBB (Linux) |
| * |
| * 28 24 20 16 12 8 4 0 |
| * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | |
| * [ ] [ sample ] [cache] [ pmc ] [unit ] c m [ pmcxsel ] |
| * | | | | | |
| * | | | | *- mark |
| * | | *- L1/L2/L3 cache_sel | |
| * | | | |
| * | *- sampling mode for marked events *- combine |
| * | |
| * *- thresh_sel |
| * |
| * Below uses IBM bit numbering. |
| * |
| * MMCR1[x:y] = unit (PMCxUNIT) |
| * MMCR1[x] = combine (PMCxCOMB) |
| * |
| * if pmc == 3 and unit == 0 and pmcxsel[0:6] == 0b0101011 |
| * # PM_MRK_FAB_RSP_MATCH |
| * MMCR1[20:27] = thresh_ctl (FAB_CRESP_MATCH / FAB_TYPE_MATCH) |
| * else if pmc == 4 and unit == 0xf and pmcxsel[0:6] == 0b0101001 |
| * # PM_MRK_FAB_RSP_MATCH_CYC |
| * MMCR1[20:27] = thresh_ctl (FAB_CRESP_MATCH / FAB_TYPE_MATCH) |
| * else |
| * MMCRA[48:55] = thresh_ctl (THRESH START/END) |
| * |
| * if thresh_sel: |
| * MMCRA[45:47] = thresh_sel |
| * |
| * if thresh_cmp: |
| * MMCRA[22:24] = thresh_cmp[0:2] |
| * MMCRA[25:31] = thresh_cmp[3:9] |
| * |
| * if unit == 6 or unit == 7 |
| * MMCRC[53:55] = cache_sel[1:3] (L2EVENT_SEL) |
| * else if unit == 8 or unit == 9: |
| * if cache_sel[0] == 0: # L3 bank |
| * MMCRC[47:49] = cache_sel[1:3] (L3EVENT_SEL0) |
| * else if cache_sel[0] == 1: |
| * MMCRC[50:51] = cache_sel[2:3] (L3EVENT_SEL1) |
| * else if cache_sel[1]: # L1 event |
| * MMCR1[16] = cache_sel[2] |
| * MMCR1[17] = cache_sel[3] |
| * |
| * if mark: |
| * MMCRA[63] = 1 (SAMPLE_ENABLE) |
| * MMCRA[57:59] = sample[0:2] (RAND_SAMP_ELIG) |
| * MMCRA[61:62] = sample[3:4] (RAND_SAMP_MODE) |
| * |
| * if EBB and BHRB: |
| * MMCRA[32:33] = IFM |
| * |
| */ |
| |
| /* PowerISA v2.07 format attribute structure*/ |
| extern struct attribute_group isa207_pmu_format_group; |
| |
| /* Table of alternatives, sorted by column 0 */ |
| static const unsigned int event_alternatives[][MAX_ALT] = { |
| { PM_MRK_ST_CMPL, PM_MRK_ST_CMPL_ALT }, |
| { PM_BR_MRK_2PATH, PM_BR_MRK_2PATH_ALT }, |
| { PM_L3_CO_MEPF, PM_L3_CO_MEPF_ALT }, |
| { PM_MRK_DATA_FROM_L2MISS, PM_MRK_DATA_FROM_L2MISS_ALT }, |
| { PM_CMPLU_STALL_ALT, PM_CMPLU_STALL }, |
| { PM_BR_2PATH, PM_BR_2PATH_ALT }, |
| { PM_INST_DISP, PM_INST_DISP_ALT }, |
| { PM_RUN_CYC_ALT, PM_RUN_CYC }, |
| { PM_MRK_FILT_MATCH, PM_MRK_FILT_MATCH_ALT }, |
| { PM_LD_MISS_L1, PM_LD_MISS_L1_ALT }, |
| { PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL }, |
| }; |
| |
| static int power8_get_alternatives(u64 event, unsigned int flags, u64 alt[]) |
| { |
| int num_alt = 0; |
| |
| num_alt = isa207_get_alternatives(event, alt, |
| ARRAY_SIZE(event_alternatives), flags, |
| event_alternatives); |
| |
| return num_alt; |
| } |
| |
| GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC); |
| GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_GCT_NOSLOT_CYC); |
| GENERIC_EVENT_ATTR(stalled-cycles-backend, PM_CMPLU_STALL); |
| GENERIC_EVENT_ATTR(instructions, PM_INST_CMPL); |
| GENERIC_EVENT_ATTR(branch-instructions, PM_BRU_FIN); |
| GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED_CMPL); |
| GENERIC_EVENT_ATTR(cache-references, PM_LD_REF_L1); |
| GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1); |
| GENERIC_EVENT_ATTR(mem_access, MEM_ACCESS); |
| |
| CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1); |
| CACHE_EVENT_ATTR(L1-dcache-loads, PM_LD_REF_L1); |
| |
| CACHE_EVENT_ATTR(L1-dcache-prefetches, PM_L1_PREF); |
| CACHE_EVENT_ATTR(L1-dcache-store-misses, PM_ST_MISS_L1); |
| CACHE_EVENT_ATTR(L1-icache-load-misses, PM_L1_ICACHE_MISS); |
| CACHE_EVENT_ATTR(L1-icache-loads, PM_INST_FROM_L1); |
| CACHE_EVENT_ATTR(L1-icache-prefetches, PM_IC_PREF_WRITE); |
| |
| CACHE_EVENT_ATTR(LLC-load-misses, PM_DATA_FROM_L3MISS); |
| CACHE_EVENT_ATTR(LLC-loads, PM_DATA_FROM_L3); |
| CACHE_EVENT_ATTR(LLC-prefetches, PM_L3_PREF_ALL); |
| CACHE_EVENT_ATTR(LLC-store-misses, PM_L2_ST_MISS); |
| CACHE_EVENT_ATTR(LLC-stores, PM_L2_ST); |
| |
| CACHE_EVENT_ATTR(branch-load-misses, PM_BR_MPRED_CMPL); |
| CACHE_EVENT_ATTR(branch-loads, PM_BRU_FIN); |
| CACHE_EVENT_ATTR(dTLB-load-misses, PM_DTLB_MISS); |
| CACHE_EVENT_ATTR(iTLB-load-misses, PM_ITLB_MISS); |
| |
| static struct attribute *power8_events_attr[] = { |
| GENERIC_EVENT_PTR(PM_CYC), |
| GENERIC_EVENT_PTR(PM_GCT_NOSLOT_CYC), |
| GENERIC_EVENT_PTR(PM_CMPLU_STALL), |
| GENERIC_EVENT_PTR(PM_INST_CMPL), |
| GENERIC_EVENT_PTR(PM_BRU_FIN), |
| GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL), |
| GENERIC_EVENT_PTR(PM_LD_REF_L1), |
| GENERIC_EVENT_PTR(PM_LD_MISS_L1), |
| GENERIC_EVENT_PTR(MEM_ACCESS), |
| |
| CACHE_EVENT_PTR(PM_LD_MISS_L1), |
| CACHE_EVENT_PTR(PM_LD_REF_L1), |
| CACHE_EVENT_PTR(PM_L1_PREF), |
| CACHE_EVENT_PTR(PM_ST_MISS_L1), |
| CACHE_EVENT_PTR(PM_L1_ICACHE_MISS), |
| CACHE_EVENT_PTR(PM_INST_FROM_L1), |
| CACHE_EVENT_PTR(PM_IC_PREF_WRITE), |
| CACHE_EVENT_PTR(PM_DATA_FROM_L3MISS), |
| CACHE_EVENT_PTR(PM_DATA_FROM_L3), |
| CACHE_EVENT_PTR(PM_L3_PREF_ALL), |
| CACHE_EVENT_PTR(PM_L2_ST_MISS), |
| CACHE_EVENT_PTR(PM_L2_ST), |
| |
| CACHE_EVENT_PTR(PM_BR_MPRED_CMPL), |
| CACHE_EVENT_PTR(PM_BRU_FIN), |
| |
| CACHE_EVENT_PTR(PM_DTLB_MISS), |
| CACHE_EVENT_PTR(PM_ITLB_MISS), |
| NULL |
| }; |
| |
| static struct attribute_group power8_pmu_events_group = { |
| .name = "events", |
| .attrs = power8_events_attr, |
| }; |
| |
| static const struct attribute_group *power8_pmu_attr_groups[] = { |
| &isa207_pmu_format_group, |
| &power8_pmu_events_group, |
| NULL, |
| }; |
| |
| static int power8_generic_events[] = { |
| [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC, |
| [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_GCT_NOSLOT_CYC, |
| [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL, |
| [PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL, |
| [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BRU_FIN, |
| [PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED_CMPL, |
| [PERF_COUNT_HW_CACHE_REFERENCES] = PM_LD_REF_L1, |
| [PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1, |
| }; |
| |
| static u64 power8_bhrb_filter_map(u64 branch_sample_type) |
| { |
| u64 pmu_bhrb_filter = 0; |
| |
| /* BHRB and regular PMU events share the same privilege state |
| * filter configuration. BHRB is always recorded along with a |
| * regular PMU event. As the privilege state filter is handled |
| * in the basic PMC configuration of the accompanying regular |
| * PMU event, we ignore any separate BHRB specific request. |
| */ |
| |
| /* No branch filter requested */ |
| if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY) |
| return pmu_bhrb_filter; |
| |
| /* Invalid branch filter options - HW does not support */ |
| if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_RETURN) |
| return -1; |
| |
| if (branch_sample_type & PERF_SAMPLE_BRANCH_IND_CALL) |
| return -1; |
| |
| if (branch_sample_type & PERF_SAMPLE_BRANCH_CALL) |
| return -1; |
| |
| if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_CALL) { |
| pmu_bhrb_filter |= POWER8_MMCRA_IFM1; |
| return pmu_bhrb_filter; |
| } |
| |
| /* Every thing else is unsupported */ |
| return -1; |
| } |
| |
| static void power8_config_bhrb(u64 pmu_bhrb_filter) |
| { |
| pmu_bhrb_filter &= POWER8_MMCRA_BHRB_MASK; |
| |
| /* Enable BHRB filter in PMU */ |
| mtspr(SPRN_MMCRA, (mfspr(SPRN_MMCRA) | pmu_bhrb_filter)); |
| } |
| |
| #define C(x) PERF_COUNT_HW_CACHE_##x |
| |
| /* |
| * Table of generalized cache-related events. |
| * 0 means not supported, -1 means nonsensical, other values |
| * are event codes. |
| */ |
| static int power8_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { |
| [ C(L1D) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = PM_LD_REF_L1, |
| [ C(RESULT_MISS) ] = PM_LD_MISS_L1, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = PM_ST_MISS_L1, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = PM_L1_PREF, |
| [ C(RESULT_MISS) ] = 0, |
| }, |
| }, |
| [ C(L1I) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = PM_INST_FROM_L1, |
| [ C(RESULT_MISS) ] = PM_L1_ICACHE_MISS, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = PM_L1_DEMAND_WRITE, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = PM_IC_PREF_WRITE, |
| [ C(RESULT_MISS) ] = 0, |
| }, |
| }, |
| [ C(LL) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = PM_DATA_FROM_L3, |
| [ C(RESULT_MISS) ] = PM_DATA_FROM_L3MISS, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = PM_L2_ST, |
| [ C(RESULT_MISS) ] = PM_L2_ST_MISS, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = PM_L3_PREF_ALL, |
| [ C(RESULT_MISS) ] = 0, |
| }, |
| }, |
| [ C(DTLB) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = PM_DTLB_MISS, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| }, |
| [ C(ITLB) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = PM_ITLB_MISS, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| }, |
| [ C(BPU) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = PM_BRU_FIN, |
| [ C(RESULT_MISS) ] = PM_BR_MPRED_CMPL, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| }, |
| [ C(NODE) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| }, |
| }; |
| |
| #undef C |
| |
| static struct power_pmu power8_pmu = { |
| .name = "POWER8", |
| .n_counter = MAX_PMU_COUNTERS, |
| .max_alternatives = MAX_ALT + 1, |
| .add_fields = ISA207_ADD_FIELDS, |
| .test_adder = ISA207_TEST_ADDER, |
| .compute_mmcr = isa207_compute_mmcr, |
| .config_bhrb = power8_config_bhrb, |
| .bhrb_filter_map = power8_bhrb_filter_map, |
| .get_constraint = isa207_get_constraint, |
| .get_alternatives = power8_get_alternatives, |
| .get_mem_data_src = isa207_get_mem_data_src, |
| .get_mem_weight = isa207_get_mem_weight, |
| .disable_pmc = isa207_disable_pmc, |
| .flags = PPMU_HAS_SIER | PPMU_ARCH_207S, |
| .n_generic = ARRAY_SIZE(power8_generic_events), |
| .generic_events = power8_generic_events, |
| .cache_events = &power8_cache_events, |
| .attr_groups = power8_pmu_attr_groups, |
| .bhrb_nr = 32, |
| }; |
| |
| static int __init init_power8_pmu(void) |
| { |
| int rc; |
| |
| if (!cur_cpu_spec->oprofile_cpu_type || |
| strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power8")) |
| return -ENODEV; |
| |
| rc = register_power_pmu(&power8_pmu); |
| if (rc) |
| return rc; |
| |
| /* Tell userspace that EBB is supported */ |
| cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB; |
| |
| if (cpu_has_feature(CPU_FTR_PMAO_BUG)) |
| pr_info("PMAO restore workaround active.\n"); |
| |
| return 0; |
| } |
| early_initcall(init_power8_pmu); |