389 lines
10 KiB
C
389 lines
10 KiB
C
/*
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* Performance counter support for POWER8 processors.
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*
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* Copyright 2009 Paul Mackerras, IBM Corporation.
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* Copyright 2013 Michael Ellerman, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#define pr_fmt(fmt) "power8-pmu: " fmt
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#include "isa207-common.h"
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/*
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* Some power8 event codes.
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*/
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#define EVENT(_name, _code) _name = _code,
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enum {
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#include "power8-events-list.h"
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};
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#undef EVENT
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/* MMCRA IFM bits - POWER8 */
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#define POWER8_MMCRA_IFM1 0x0000000040000000UL
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#define POWER8_MMCRA_IFM2 0x0000000080000000UL
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#define POWER8_MMCRA_IFM3 0x00000000C0000000UL
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/* PowerISA v2.07 format attribute structure*/
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extern struct attribute_group isa207_pmu_format_group;
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/* Table of alternatives, sorted by column 0 */
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static const unsigned int event_alternatives[][MAX_ALT] = {
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{ PM_MRK_ST_CMPL, PM_MRK_ST_CMPL_ALT },
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{ PM_BR_MRK_2PATH, PM_BR_MRK_2PATH_ALT },
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{ PM_L3_CO_MEPF, PM_L3_CO_MEPF_ALT },
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{ PM_MRK_DATA_FROM_L2MISS, PM_MRK_DATA_FROM_L2MISS_ALT },
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{ PM_CMPLU_STALL_ALT, PM_CMPLU_STALL },
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{ PM_BR_2PATH, PM_BR_2PATH_ALT },
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{ PM_INST_DISP, PM_INST_DISP_ALT },
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{ PM_RUN_CYC_ALT, PM_RUN_CYC },
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{ PM_MRK_FILT_MATCH, PM_MRK_FILT_MATCH_ALT },
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{ PM_LD_MISS_L1, PM_LD_MISS_L1_ALT },
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{ PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL },
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};
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/*
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* Scan the alternatives table for a match and return the
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* index into the alternatives table if found, else -1.
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*/
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static int find_alternative(u64 event)
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{
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int i, j;
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for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
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if (event < event_alternatives[i][0])
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break;
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for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
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if (event == event_alternatives[i][j])
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return i;
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}
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return -1;
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}
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static int power8_get_alternatives(u64 event, unsigned int flags, u64 alt[])
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{
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int i, j, num_alt = 0;
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u64 alt_event;
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alt[num_alt++] = event;
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i = find_alternative(event);
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if (i >= 0) {
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/* Filter out the original event, it's already in alt[0] */
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for (j = 0; j < MAX_ALT; ++j) {
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alt_event = event_alternatives[i][j];
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if (alt_event && alt_event != event)
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alt[num_alt++] = alt_event;
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}
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}
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if (flags & PPMU_ONLY_COUNT_RUN) {
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/*
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* We're only counting in RUN state, so PM_CYC is equivalent to
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* PM_RUN_CYC and PM_INST_CMPL === PM_RUN_INST_CMPL.
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*/
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j = num_alt;
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for (i = 0; i < num_alt; ++i) {
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switch (alt[i]) {
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case PM_CYC:
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alt[j++] = PM_RUN_CYC;
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break;
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case PM_RUN_CYC:
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alt[j++] = PM_CYC;
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break;
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case PM_INST_CMPL:
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alt[j++] = PM_RUN_INST_CMPL;
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break;
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case PM_RUN_INST_CMPL:
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alt[j++] = PM_INST_CMPL;
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break;
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}
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}
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num_alt = j;
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}
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return num_alt;
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}
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GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC);
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GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_GCT_NOSLOT_CYC);
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GENERIC_EVENT_ATTR(stalled-cycles-backend, PM_CMPLU_STALL);
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GENERIC_EVENT_ATTR(instructions, PM_INST_CMPL);
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GENERIC_EVENT_ATTR(branch-instructions, PM_BRU_FIN);
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GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED_CMPL);
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GENERIC_EVENT_ATTR(cache-references, PM_LD_REF_L1);
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GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1);
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CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1);
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CACHE_EVENT_ATTR(L1-dcache-loads, PM_LD_REF_L1);
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CACHE_EVENT_ATTR(L1-dcache-prefetches, PM_L1_PREF);
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CACHE_EVENT_ATTR(L1-dcache-store-misses, PM_ST_MISS_L1);
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CACHE_EVENT_ATTR(L1-icache-load-misses, PM_L1_ICACHE_MISS);
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CACHE_EVENT_ATTR(L1-icache-loads, PM_INST_FROM_L1);
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CACHE_EVENT_ATTR(L1-icache-prefetches, PM_IC_PREF_WRITE);
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CACHE_EVENT_ATTR(LLC-load-misses, PM_DATA_FROM_L3MISS);
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CACHE_EVENT_ATTR(LLC-loads, PM_DATA_FROM_L3);
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CACHE_EVENT_ATTR(LLC-prefetches, PM_L3_PREF_ALL);
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CACHE_EVENT_ATTR(LLC-store-misses, PM_L2_ST_MISS);
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CACHE_EVENT_ATTR(LLC-stores, PM_L2_ST);
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CACHE_EVENT_ATTR(branch-load-misses, PM_BR_MPRED_CMPL);
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CACHE_EVENT_ATTR(branch-loads, PM_BRU_FIN);
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CACHE_EVENT_ATTR(dTLB-load-misses, PM_DTLB_MISS);
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CACHE_EVENT_ATTR(iTLB-load-misses, PM_ITLB_MISS);
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static struct attribute *power8_events_attr[] = {
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GENERIC_EVENT_PTR(PM_CYC),
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GENERIC_EVENT_PTR(PM_GCT_NOSLOT_CYC),
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GENERIC_EVENT_PTR(PM_CMPLU_STALL),
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GENERIC_EVENT_PTR(PM_INST_CMPL),
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GENERIC_EVENT_PTR(PM_BRU_FIN),
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GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL),
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GENERIC_EVENT_PTR(PM_LD_REF_L1),
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GENERIC_EVENT_PTR(PM_LD_MISS_L1),
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CACHE_EVENT_PTR(PM_LD_MISS_L1),
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CACHE_EVENT_PTR(PM_LD_REF_L1),
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CACHE_EVENT_PTR(PM_L1_PREF),
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CACHE_EVENT_PTR(PM_ST_MISS_L1),
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CACHE_EVENT_PTR(PM_L1_ICACHE_MISS),
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CACHE_EVENT_PTR(PM_INST_FROM_L1),
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CACHE_EVENT_PTR(PM_IC_PREF_WRITE),
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CACHE_EVENT_PTR(PM_DATA_FROM_L3MISS),
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CACHE_EVENT_PTR(PM_DATA_FROM_L3),
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CACHE_EVENT_PTR(PM_L3_PREF_ALL),
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CACHE_EVENT_PTR(PM_L2_ST_MISS),
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CACHE_EVENT_PTR(PM_L2_ST),
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CACHE_EVENT_PTR(PM_BR_MPRED_CMPL),
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CACHE_EVENT_PTR(PM_BRU_FIN),
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CACHE_EVENT_PTR(PM_DTLB_MISS),
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CACHE_EVENT_PTR(PM_ITLB_MISS),
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NULL
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};
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static struct attribute_group power8_pmu_events_group = {
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.name = "events",
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.attrs = power8_events_attr,
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};
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static const struct attribute_group *power8_pmu_attr_groups[] = {
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&isa207_pmu_format_group,
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&power8_pmu_events_group,
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NULL,
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};
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static int power8_generic_events[] = {
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[PERF_COUNT_HW_CPU_CYCLES] = PM_CYC,
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[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_GCT_NOSLOT_CYC,
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[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL,
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[PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL,
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[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BRU_FIN,
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[PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED_CMPL,
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[PERF_COUNT_HW_CACHE_REFERENCES] = PM_LD_REF_L1,
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[PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1,
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};
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static u64 power8_bhrb_filter_map(u64 branch_sample_type)
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{
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u64 pmu_bhrb_filter = 0;
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/* BHRB and regular PMU events share the same privilege state
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* filter configuration. BHRB is always recorded along with a
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* regular PMU event. As the privilege state filter is handled
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* in the basic PMC configuration of the accompanying regular
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* PMU event, we ignore any separate BHRB specific request.
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*/
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/* No branch filter requested */
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if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY)
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return pmu_bhrb_filter;
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/* Invalid branch filter options - HW does not support */
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if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_RETURN)
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return -1;
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if (branch_sample_type & PERF_SAMPLE_BRANCH_IND_CALL)
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return -1;
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if (branch_sample_type & PERF_SAMPLE_BRANCH_CALL)
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return -1;
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if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_CALL) {
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pmu_bhrb_filter |= POWER8_MMCRA_IFM1;
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return pmu_bhrb_filter;
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}
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/* Every thing else is unsupported */
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return -1;
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}
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static void power8_config_bhrb(u64 pmu_bhrb_filter)
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{
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/* Enable BHRB filter in PMU */
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mtspr(SPRN_MMCRA, (mfspr(SPRN_MMCRA) | pmu_bhrb_filter));
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}
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#define C(x) PERF_COUNT_HW_CACHE_##x
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/*
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* Table of generalized cache-related events.
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* 0 means not supported, -1 means nonsensical, other values
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* are event codes.
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*/
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static int power8_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
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[ C(L1D) ] = {
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[ C(OP_READ) ] = {
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[ C(RESULT_ACCESS) ] = PM_LD_REF_L1,
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[ C(RESULT_MISS) ] = PM_LD_MISS_L1,
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},
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[ C(OP_WRITE) ] = {
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[ C(RESULT_ACCESS) ] = 0,
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[ C(RESULT_MISS) ] = PM_ST_MISS_L1,
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},
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[ C(OP_PREFETCH) ] = {
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[ C(RESULT_ACCESS) ] = PM_L1_PREF,
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[ C(RESULT_MISS) ] = 0,
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},
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},
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[ C(L1I) ] = {
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[ C(OP_READ) ] = {
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[ C(RESULT_ACCESS) ] = PM_INST_FROM_L1,
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[ C(RESULT_MISS) ] = PM_L1_ICACHE_MISS,
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},
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[ C(OP_WRITE) ] = {
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[ C(RESULT_ACCESS) ] = PM_L1_DEMAND_WRITE,
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[ C(RESULT_MISS) ] = -1,
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},
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[ C(OP_PREFETCH) ] = {
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[ C(RESULT_ACCESS) ] = PM_IC_PREF_WRITE,
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[ C(RESULT_MISS) ] = 0,
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},
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},
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[ C(LL) ] = {
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[ C(OP_READ) ] = {
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[ C(RESULT_ACCESS) ] = PM_DATA_FROM_L3,
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[ C(RESULT_MISS) ] = PM_DATA_FROM_L3MISS,
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},
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[ C(OP_WRITE) ] = {
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[ C(RESULT_ACCESS) ] = PM_L2_ST,
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[ C(RESULT_MISS) ] = PM_L2_ST_MISS,
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},
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[ C(OP_PREFETCH) ] = {
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[ C(RESULT_ACCESS) ] = PM_L3_PREF_ALL,
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[ C(RESULT_MISS) ] = 0,
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},
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},
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[ C(DTLB) ] = {
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[ C(OP_READ) ] = {
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[ C(RESULT_ACCESS) ] = 0,
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[ C(RESULT_MISS) ] = PM_DTLB_MISS,
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},
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[ C(OP_WRITE) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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[ C(OP_PREFETCH) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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},
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[ C(ITLB) ] = {
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[ C(OP_READ) ] = {
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[ C(RESULT_ACCESS) ] = 0,
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[ C(RESULT_MISS) ] = PM_ITLB_MISS,
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},
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[ C(OP_WRITE) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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[ C(OP_PREFETCH) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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},
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[ C(BPU) ] = {
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[ C(OP_READ) ] = {
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[ C(RESULT_ACCESS) ] = PM_BRU_FIN,
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[ C(RESULT_MISS) ] = PM_BR_MPRED_CMPL,
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},
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[ C(OP_WRITE) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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[ C(OP_PREFETCH) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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},
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[ C(NODE) ] = {
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[ C(OP_READ) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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[ C(OP_WRITE) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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[ C(OP_PREFETCH) ] = {
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[ C(RESULT_ACCESS) ] = -1,
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[ C(RESULT_MISS) ] = -1,
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},
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},
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};
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#undef C
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static struct power_pmu power8_pmu = {
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.name = "POWER8",
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.n_counter = MAX_PMU_COUNTERS,
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.max_alternatives = MAX_ALT + 1,
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.add_fields = ISA207_ADD_FIELDS,
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.test_adder = ISA207_TEST_ADDER,
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.compute_mmcr = isa207_compute_mmcr,
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.config_bhrb = power8_config_bhrb,
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.bhrb_filter_map = power8_bhrb_filter_map,
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.get_constraint = isa207_get_constraint,
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.get_alternatives = power8_get_alternatives,
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.disable_pmc = isa207_disable_pmc,
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.flags = PPMU_HAS_SIER | PPMU_ARCH_207S,
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.n_generic = ARRAY_SIZE(power8_generic_events),
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.generic_events = power8_generic_events,
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.cache_events = &power8_cache_events,
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.attr_groups = power8_pmu_attr_groups,
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.bhrb_nr = 32,
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};
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static int __init init_power8_pmu(void)
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{
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int rc;
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if (!cur_cpu_spec->oprofile_cpu_type ||
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strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power8"))
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return -ENODEV;
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rc = register_power_pmu(&power8_pmu);
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if (rc)
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return rc;
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/* Tell userspace that EBB is supported */
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cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB;
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if (cpu_has_feature(CPU_FTR_PMAO_BUG))
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pr_info("PMAO restore workaround active.\n");
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return 0;
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}
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early_initcall(init_power8_pmu);
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