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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Performance counter support for POWER9 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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* Copyright 2016 Madhavan Srinivasan, IBM Corporation. |
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*/ |
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#define pr_fmt(fmt) "power9-pmu: " fmt |
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#include "isa207-common.h" |
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/* |
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* Raw event encoding for Power9: |
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* |
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* 60 56 52 48 44 40 36 32 |
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* | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | |
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* | | [ ] [ ] [ thresh_cmp ] [ thresh_ctl ] |
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* | | | | | |
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* | | *- IFM (Linux) | thresh start/stop -* |
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* | *- BHRB (Linux) *sm |
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* *- EBB (Linux) |
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* |
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* 28 24 20 16 12 8 4 0 |
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* | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | |
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* [ ] [ sample ] [cache] [ pmc ] [unit ] [] m [ pmcxsel ] |
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* | | | | | |
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* | | | | *- mark |
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* | | *- L1/L2/L3 cache_sel | |
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* | | | |
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* | *- sampling mode for marked events *- combine |
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* | |
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* *- thresh_sel |
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* |
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* Below uses IBM bit numbering. |
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* |
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* MMCR1[x:y] = unit (PMCxUNIT) |
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* MMCR1[24] = pmc1combine[0] |
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* MMCR1[25] = pmc1combine[1] |
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* MMCR1[26] = pmc2combine[0] |
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* MMCR1[27] = pmc2combine[1] |
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* MMCR1[28] = pmc3combine[0] |
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* MMCR1[29] = pmc3combine[1] |
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* MMCR1[30] = pmc4combine[0] |
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* MMCR1[31] = pmc4combine[1] |
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* |
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* if pmc == 3 and unit == 0 and pmcxsel[0:6] == 0b0101011 |
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* MMCR1[20:27] = thresh_ctl |
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* else if pmc == 4 and unit == 0xf and pmcxsel[0:6] == 0b0101001 |
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* MMCR1[20:27] = thresh_ctl |
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* else |
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* MMCRA[48:55] = thresh_ctl (THRESH START/END) |
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* |
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* if thresh_sel: |
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* MMCRA[45:47] = thresh_sel |
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* |
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* if thresh_cmp: |
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* MMCRA[9:11] = thresh_cmp[0:2] |
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* MMCRA[12:18] = thresh_cmp[3:9] |
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* |
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* MMCR1[16] = cache_sel[2] |
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* MMCR1[17] = cache_sel[3] |
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* |
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* if mark: |
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* MMCRA[63] = 1 (SAMPLE_ENABLE) |
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* MMCRA[57:59] = sample[0:2] (RAND_SAMP_ELIG) |
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* MMCRA[61:62] = sample[3:4] (RAND_SAMP_MODE) |
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* |
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* if EBB and BHRB: |
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* MMCRA[32:33] = IFM |
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* |
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* MMCRA[SDAR_MODE] = sm |
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*/ |
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/* |
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* Some power9 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 "power9-events-list.h" |
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}; |
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#undef EVENT |
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/* MMCRA IFM bits - POWER9 */ |
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#define POWER9_MMCRA_IFM1 0x0000000040000000UL |
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#define POWER9_MMCRA_IFM2 0x0000000080000000UL |
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#define POWER9_MMCRA_IFM3 0x00000000C0000000UL |
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#define POWER9_MMCRA_BHRB_MASK 0x00000000C0000000UL |
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extern u64 PERF_REG_EXTENDED_MASK; |
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/* Nasty Power9 specific hack */ |
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#define PVR_POWER9_CUMULUS 0x00002000 |
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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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int p9_dd21_bl_ev[] = { |
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PM_MRK_ST_DONE_L2, |
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PM_RADIX_PWC_L1_HIT, |
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PM_FLOP_CMPL, |
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PM_MRK_NTF_FIN, |
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PM_RADIX_PWC_L2_HIT, |
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PM_IFETCH_THROTTLE, |
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PM_MRK_L2_TM_ST_ABORT_SISTER, |
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PM_RADIX_PWC_L3_HIT, |
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PM_RUN_CYC_SMT2_MODE, |
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PM_TM_TX_PASS_RUN_INST, |
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PM_DISP_HELD_SYNC_HOLD, |
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}; |
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int p9_dd22_bl_ev[] = { |
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PM_DTLB_MISS_16G, |
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PM_DERAT_MISS_2M, |
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PM_DTLB_MISS_2M, |
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PM_MRK_DTLB_MISS_1G, |
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PM_DTLB_MISS_4K, |
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PM_DERAT_MISS_1G, |
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PM_MRK_DERAT_MISS_2M, |
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PM_MRK_DTLB_MISS_4K, |
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PM_MRK_DTLB_MISS_16G, |
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PM_DTLB_MISS_64K, |
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PM_MRK_DERAT_MISS_1G, |
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PM_MRK_DTLB_MISS_64K, |
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PM_DISP_HELD_SYNC_HOLD, |
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PM_DTLB_MISS_16M, |
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PM_DTLB_MISS_1G, |
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PM_MRK_DTLB_MISS_16M, |
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}; |
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/* Table of alternatives, sorted by column 0 */ |
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static const unsigned int power9_event_alternatives[][MAX_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_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL }, |
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{ PM_LD_MISS_L1, PM_LD_MISS_L1_ALT }, |
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{ PM_BR_2PATH, PM_BR_2PATH_ALT }, |
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}; |
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static int power9_get_alternatives(u64 event, unsigned int flags, u64 alt[]) |
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{ |
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int num_alt = 0; |
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num_alt = isa207_get_alternatives(event, alt, |
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ARRAY_SIZE(power9_event_alternatives), flags, |
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power9_event_alternatives); |
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return num_alt; |
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} |
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static int power9_check_attr_config(struct perf_event *ev) |
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{ |
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u64 val; |
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u64 event = ev->attr.config; |
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val = (event >> EVENT_SAMPLE_SHIFT) & EVENT_SAMPLE_MASK; |
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if (val == 0xC || isa3XX_check_attr_config(ev)) |
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return -EINVAL; |
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return 0; |
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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_ICT_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_BR_CMPL); |
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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_FIN); |
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GENERIC_EVENT_ATTR(mem-loads, MEM_LOADS); |
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GENERIC_EVENT_ATTR(mem-stores, MEM_STORES); |
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CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1_FIN); |
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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(branch-load-misses, PM_BR_MPRED_CMPL); |
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CACHE_EVENT_ATTR(branch-loads, PM_BR_CMPL); |
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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 *power9_events_attr[] = { |
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GENERIC_EVENT_PTR(PM_CYC), |
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GENERIC_EVENT_PTR(PM_ICT_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_BR_CMPL), |
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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_FIN), |
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GENERIC_EVENT_PTR(MEM_LOADS), |
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GENERIC_EVENT_PTR(MEM_STORES), |
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CACHE_EVENT_PTR(PM_LD_MISS_L1_FIN), |
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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_BR_MPRED_CMPL), |
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CACHE_EVENT_PTR(PM_BR_CMPL), |
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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 power9_pmu_events_group = { |
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.name = "events", |
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.attrs = power9_events_attr, |
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}; |
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PMU_FORMAT_ATTR(event, "config:0-51"); |
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PMU_FORMAT_ATTR(pmcxsel, "config:0-7"); |
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PMU_FORMAT_ATTR(mark, "config:8"); |
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PMU_FORMAT_ATTR(combine, "config:10-11"); |
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PMU_FORMAT_ATTR(unit, "config:12-15"); |
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PMU_FORMAT_ATTR(pmc, "config:16-19"); |
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PMU_FORMAT_ATTR(cache_sel, "config:20-23"); |
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PMU_FORMAT_ATTR(sample_mode, "config:24-28"); |
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PMU_FORMAT_ATTR(thresh_sel, "config:29-31"); |
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PMU_FORMAT_ATTR(thresh_stop, "config:32-35"); |
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PMU_FORMAT_ATTR(thresh_start, "config:36-39"); |
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PMU_FORMAT_ATTR(thresh_cmp, "config:40-49"); |
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PMU_FORMAT_ATTR(sdar_mode, "config:50-51"); |
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static struct attribute *power9_pmu_format_attr[] = { |
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&format_attr_event.attr, |
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&format_attr_pmcxsel.attr, |
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&format_attr_mark.attr, |
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&format_attr_combine.attr, |
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&format_attr_unit.attr, |
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&format_attr_pmc.attr, |
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&format_attr_cache_sel.attr, |
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&format_attr_sample_mode.attr, |
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&format_attr_thresh_sel.attr, |
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&format_attr_thresh_stop.attr, |
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&format_attr_thresh_start.attr, |
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&format_attr_thresh_cmp.attr, |
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&format_attr_sdar_mode.attr, |
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NULL, |
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}; |
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static struct attribute_group power9_pmu_format_group = { |
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.name = "format", |
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.attrs = power9_pmu_format_attr, |
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}; |
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static const struct attribute_group *power9_pmu_attr_groups[] = { |
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&power9_pmu_format_group, |
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&power9_pmu_events_group, |
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NULL, |
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}; |
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static int power9_generic_events[] = { |
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[PERF_COUNT_HW_CPU_CYCLES] = PM_CYC, |
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[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_ICT_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_BR_CMPL, |
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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_FIN, |
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}; |
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static u64 power9_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 |= POWER9_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 power9_config_bhrb(u64 pmu_bhrb_filter) |
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{ |
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pmu_bhrb_filter &= POWER9_MMCRA_BHRB_MASK; |
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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 u64 power9_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_FIN, |
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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) ] = 0, |
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[ C(RESULT_MISS) ] = 0, |
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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_BR_CMPL, |
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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, |
|
|
}, |
|
|
}, |
|
|
[ 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 power9_pmu = { |
|
|
.name = "POWER9", |
|
|
.n_counter = MAX_PMU_COUNTERS, |
|
|
.add_fields = ISA207_ADD_FIELDS, |
|
|
.test_adder = ISA207_TEST_ADDER, |
|
|
.group_constraint_mask = CNST_CACHE_PMC4_MASK, |
|
|
.group_constraint_val = CNST_CACHE_PMC4_VAL, |
|
|
.compute_mmcr = isa207_compute_mmcr, |
|
|
.config_bhrb = power9_config_bhrb, |
|
|
.bhrb_filter_map = power9_bhrb_filter_map, |
|
|
.get_constraint = isa207_get_constraint, |
|
|
.get_alternatives = power9_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(power9_generic_events), |
|
|
.generic_events = power9_generic_events, |
|
|
.cache_events = &power9_cache_events, |
|
|
.attr_groups = power9_pmu_attr_groups, |
|
|
.bhrb_nr = 32, |
|
|
.capabilities = PERF_PMU_CAP_EXTENDED_REGS, |
|
|
.check_attr_config = power9_check_attr_config, |
|
|
}; |
|
|
|
|
|
int init_power9_pmu(void) |
|
|
{ |
|
|
int rc = 0; |
|
|
unsigned int pvr = mfspr(SPRN_PVR); |
|
|
|
|
|
/* Comes from cpu_specs[] */ |
|
|
if (!cur_cpu_spec->oprofile_cpu_type || |
|
|
strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power9")) |
|
|
return -ENODEV; |
|
|
|
|
|
/* Blacklist events */ |
|
|
if (!(pvr & PVR_POWER9_CUMULUS)) { |
|
|
if ((PVR_CFG(pvr) == 2) && (PVR_MIN(pvr) == 1)) { |
|
|
power9_pmu.blacklist_ev = p9_dd21_bl_ev; |
|
|
power9_pmu.n_blacklist_ev = ARRAY_SIZE(p9_dd21_bl_ev); |
|
|
} else if ((PVR_CFG(pvr) == 2) && (PVR_MIN(pvr) == 2)) { |
|
|
power9_pmu.blacklist_ev = p9_dd22_bl_ev; |
|
|
power9_pmu.n_blacklist_ev = ARRAY_SIZE(p9_dd22_bl_ev); |
|
|
} |
|
|
} |
|
|
|
|
|
/* Set the PERF_REG_EXTENDED_MASK here */ |
|
|
PERF_REG_EXTENDED_MASK = PERF_REG_PMU_MASK_300; |
|
|
|
|
|
rc = register_power_pmu(&power9_pmu); |
|
|
if (rc) |
|
|
return rc; |
|
|
|
|
|
/* Tell userspace that EBB is supported */ |
|
|
cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB; |
|
|
|
|
|
return 0; |
|
|
}
|
|
|
|