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mirror_ubuntu-kernels/arch/powerpc/perf/power9-pmu.c

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lowlatency-hwe-6.8-next
2024-07-02 00:48:40 +03:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Performance counter support for POWER9 processors.
*
* Copyright 2009 Paul Mackerras, IBM Corporation.
* Copyright 2013 Michael Ellerman, IBM Corporation.
* Copyright 2016 Madhavan Srinivasan, IBM Corporation.
*/
#define pr_fmt(fmt) "power9-pmu: " fmt
#include "isa207-common.h"
/*
* Raw event encoding for Power9:
*
* 60 56 52 48 44 40 36 32
* | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
* | | [ ] [ ] [ thresh_cmp ] [ thresh_ctl ]
* | | | | |
* | | *- IFM (Linux) | thresh start/stop -*
* | *- BHRB (Linux) *sm
* *- EBB (Linux)
*
* 28 24 20 16 12 8 4 0
* | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
* [ ] [ sample ] [cache] [ pmc ] [unit ] [] 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[24] = pmc1combine[0]
* MMCR1[25] = pmc1combine[1]
* MMCR1[26] = pmc2combine[0]
* MMCR1[27] = pmc2combine[1]
* MMCR1[28] = pmc3combine[0]
* MMCR1[29] = pmc3combine[1]
* MMCR1[30] = pmc4combine[0]
* MMCR1[31] = pmc4combine[1]
*
* if pmc == 3 and unit == 0 and pmcxsel[0:6] == 0b0101011
* MMCR1[20:27] = thresh_ctl
* else if pmc == 4 and unit == 0xf and pmcxsel[0:6] == 0b0101001
* MMCR1[20:27] = thresh_ctl
* else
* MMCRA[48:55] = thresh_ctl (THRESH START/END)
*
* if thresh_sel:
* MMCRA[45:47] = thresh_sel
*
* if thresh_cmp:
* MMCRA[9:11] = thresh_cmp[0:2]
* MMCRA[12:18] = thresh_cmp[3:9]
*
* 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
*
* MMCRA[SDAR_MODE] = sm
*/
/*
* Some power9 event codes.
*/
#define EVENT(_name, _code) _name = _code,
enum {
#include "power9-events-list.h"
};
#undef EVENT
/* MMCRA IFM bits - POWER9 */
#define POWER9_MMCRA_IFM1 0x0000000040000000UL
#define POWER9_MMCRA_IFM2 0x0000000080000000UL
#define POWER9_MMCRA_IFM3 0x00000000C0000000UL
#define POWER9_MMCRA_BHRB_MASK 0x00000000C0000000UL
extern u64 PERF_REG_EXTENDED_MASK;
/* Nasty Power9 specific hack */
#define PVR_POWER9_CUMULUS 0x00002000
/* PowerISA v2.07 format attribute structure*/
extern const struct attribute_group isa207_pmu_format_group;
static int p9_dd21_bl_ev[] = {
PM_MRK_ST_DONE_L2,
PM_RADIX_PWC_L1_HIT,
PM_FLOP_CMPL,
PM_MRK_NTF_FIN,
PM_RADIX_PWC_L2_HIT,
PM_IFETCH_THROTTLE,
PM_MRK_L2_TM_ST_ABORT_SISTER,
PM_RADIX_PWC_L3_HIT,
PM_RUN_CYC_SMT2_MODE,
PM_TM_TX_PASS_RUN_INST,
PM_DISP_HELD_SYNC_HOLD,
};
static int p9_dd22_bl_ev[] = {
PM_DTLB_MISS_16G,
PM_DERAT_MISS_2M,
PM_DTLB_MISS_2M,
PM_MRK_DTLB_MISS_1G,
PM_DTLB_MISS_4K,
PM_DERAT_MISS_1G,
PM_MRK_DERAT_MISS_2M,
PM_MRK_DTLB_MISS_4K,
PM_MRK_DTLB_MISS_16G,
PM_DTLB_MISS_64K,
PM_MRK_DERAT_MISS_1G,
PM_MRK_DTLB_MISS_64K,
PM_DISP_HELD_SYNC_HOLD,
PM_DTLB_MISS_16M,
PM_DTLB_MISS_1G,
PM_MRK_DTLB_MISS_16M,
};
/* Table of alternatives, sorted by column 0 */
static const unsigned int power9_event_alternatives[][MAX_ALT] = {
{ PM_BR_2PATH, PM_BR_2PATH_ALT },
{ PM_INST_DISP, PM_INST_DISP_ALT },
{ PM_RUN_CYC_ALT, PM_RUN_CYC },
{ PM_LD_MISS_L1, PM_LD_MISS_L1_ALT },
{ PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL },
};
static int power9_get_alternatives(u64 event, unsigned int flags, u64 alt[])
{
int num_alt = 0;
num_alt = isa207_get_alternatives(event, alt,
ARRAY_SIZE(power9_event_alternatives), flags,
power9_event_alternatives);
return num_alt;
}
static int power9_check_attr_config(struct perf_event *ev)
{
u64 val;
u64 event = ev->attr.config;
val = (event >> EVENT_SAMPLE_SHIFT) & EVENT_SAMPLE_MASK;
if (val == 0xC || isa3XX_check_attr_config(ev))
return -EINVAL;
return 0;
}
GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC);
GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_ICT_NOSLOT_CYC);
GENERIC_EVENT_ATTR(stalled-cycles-backend, PM_CMPLU_STALL);
GENERIC_EVENT_ATTR(instructions, PM_INST_CMPL);
GENERIC_EVENT_ATTR(branch-instructions, PM_BR_CMPL);
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_FIN);
GENERIC_EVENT_ATTR(mem-loads, MEM_LOADS);
GENERIC_EVENT_ATTR(mem-stores, MEM_STORES);
CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1_FIN);
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(branch-load-misses, PM_BR_MPRED_CMPL);
CACHE_EVENT_ATTR(branch-loads, PM_BR_CMPL);
CACHE_EVENT_ATTR(dTLB-load-misses, PM_DTLB_MISS);
CACHE_EVENT_ATTR(iTLB-load-misses, PM_ITLB_MISS);
static struct attribute *power9_events_attr[] = {
GENERIC_EVENT_PTR(PM_CYC),
GENERIC_EVENT_PTR(PM_ICT_NOSLOT_CYC),
GENERIC_EVENT_PTR(PM_CMPLU_STALL),
GENERIC_EVENT_PTR(PM_INST_CMPL),
GENERIC_EVENT_PTR(PM_BR_CMPL),
GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL),
GENERIC_EVENT_PTR(PM_LD_REF_L1),
GENERIC_EVENT_PTR(PM_LD_MISS_L1_FIN),
GENERIC_EVENT_PTR(MEM_LOADS),
GENERIC_EVENT_PTR(MEM_STORES),
CACHE_EVENT_PTR(PM_LD_MISS_L1_FIN),
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_BR_MPRED_CMPL),
CACHE_EVENT_PTR(PM_BR_CMPL),
CACHE_EVENT_PTR(PM_DTLB_MISS),
CACHE_EVENT_PTR(PM_ITLB_MISS),
NULL
};
static const struct attribute_group power9_pmu_events_group = {
.name = "events",
.attrs = power9_events_attr,
};
PMU_FORMAT_ATTR(event, "config:0-51");
PMU_FORMAT_ATTR(pmcxsel, "config:0-7");
PMU_FORMAT_ATTR(mark, "config:8");
PMU_FORMAT_ATTR(combine, "config:10-11");
PMU_FORMAT_ATTR(unit, "config:12-15");
PMU_FORMAT_ATTR(pmc, "config:16-19");
PMU_FORMAT_ATTR(cache_sel, "config:20-23");
PMU_FORMAT_ATTR(sample_mode, "config:24-28");
PMU_FORMAT_ATTR(thresh_sel, "config:29-31");
PMU_FORMAT_ATTR(thresh_stop, "config:32-35");
PMU_FORMAT_ATTR(thresh_start, "config:36-39");
PMU_FORMAT_ATTR(thresh_cmp, "config:40-49");
PMU_FORMAT_ATTR(sdar_mode, "config:50-51");
static struct attribute *power9_pmu_format_attr[] = {
&format_attr_event.attr,
&format_attr_pmcxsel.attr,
&format_attr_mark.attr,
&format_attr_combine.attr,
&format_attr_unit.attr,
&format_attr_pmc.attr,
&format_attr_cache_sel.attr,
&format_attr_sample_mode.attr,
&format_attr_thresh_sel.attr,
&format_attr_thresh_stop.attr,
&format_attr_thresh_start.attr,
&format_attr_thresh_cmp.attr,
&format_attr_sdar_mode.attr,
NULL,
};
static const struct attribute_group power9_pmu_format_group = {
.name = "format",
.attrs = power9_pmu_format_attr,
};
static struct attribute *power9_pmu_caps_attrs[] = {
NULL
};
static struct attribute_group power9_pmu_caps_group = {
.name = "caps",
.attrs = power9_pmu_caps_attrs,
};
static const struct attribute_group *power9_pmu_attr_groups[] = {
&power9_pmu_format_group,
&power9_pmu_events_group,
&power9_pmu_caps_group,
NULL,
};
static int power9_generic_events[] = {
[PERF_COUNT_HW_CPU_CYCLES] = PM_CYC,
[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_ICT_NOSLOT_CYC,
[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL,
[PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL,
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BR_CMPL,
[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_FIN,
};
static u64 power9_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 |= POWER9_MMCRA_IFM1;
return pmu_bhrb_filter;
}
/* Every thing else is unsupported */
return -1;
}
static void power9_config_bhrb(u64 pmu_bhrb_filter)
{
pmu_bhrb_filter &= POWER9_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 u64 power9_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_FIN,
},
[ 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) ] = 0,
[ C(RESULT_MISS) ] = 0,
},
[ 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_BR_CMPL,
[ 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 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 init_power9_pmu(void)
{
int rc = 0;
unsigned int pvr = mfspr(SPRN_PVR);
if (PVR_VER(pvr) != PVR_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;
}
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