From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/powerpc/perf/isa207-common.c | 559 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 559 insertions(+) create mode 100644 arch/powerpc/perf/isa207-common.c (limited to 'arch/powerpc/perf/isa207-common.c') diff --git a/arch/powerpc/perf/isa207-common.c b/arch/powerpc/perf/isa207-common.c new file mode 100644 index 000000000..08f222776 --- /dev/null +++ b/arch/powerpc/perf/isa207-common.c @@ -0,0 +1,559 @@ +/* + * Common Performance counter support functions for PowerISA v2.07 processors. + * + * Copyright 2009 Paul Mackerras, IBM Corporation. + * Copyright 2013 Michael Ellerman, IBM Corporation. + * Copyright 2016 Madhavan Srinivasan, 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. + */ +#include "isa207-common.h" + +PMU_FORMAT_ATTR(event, "config:0-49"); +PMU_FORMAT_ATTR(pmcxsel, "config:0-7"); +PMU_FORMAT_ATTR(mark, "config:8"); +PMU_FORMAT_ATTR(combine, "config: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"); + +struct attribute *isa207_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, + NULL, +}; + +struct attribute_group isa207_pmu_format_group = { + .name = "format", + .attrs = isa207_pmu_format_attr, +}; + +static inline bool event_is_fab_match(u64 event) +{ + /* Only check pmc, unit and pmcxsel, ignore the edge bit (0) */ + event &= 0xff0fe; + + /* PM_MRK_FAB_RSP_MATCH & PM_MRK_FAB_RSP_MATCH_CYC */ + return (event == 0x30056 || event == 0x4f052); +} + +static bool is_event_valid(u64 event) +{ + u64 valid_mask = EVENT_VALID_MASK; + + if (cpu_has_feature(CPU_FTR_ARCH_300)) + valid_mask = p9_EVENT_VALID_MASK; + + return !(event & ~valid_mask); +} + +static inline bool is_event_marked(u64 event) +{ + if (event & EVENT_IS_MARKED) + return true; + + return false; +} + +static void mmcra_sdar_mode(u64 event, unsigned long *mmcra) +{ + /* + * MMCRA[SDAR_MODE] specifices how the SDAR should be updated in + * continous sampling mode. + * + * Incase of Power8: + * MMCRA[SDAR_MODE] will be programmed as "0b01" for continous sampling + * mode and will be un-changed when setting MMCRA[63] (Marked events). + * + * Incase of Power9: + * Marked event: MMCRA[SDAR_MODE] will be set to 0b00 ('No Updates'), + * or if group already have any marked events. + * For rest + * MMCRA[SDAR_MODE] will be set from event code. + * If sdar_mode from event is zero, default to 0b01. Hardware + * requires that we set a non-zero value. + */ + if (cpu_has_feature(CPU_FTR_ARCH_300)) { + if (is_event_marked(event) || (*mmcra & MMCRA_SAMPLE_ENABLE)) + *mmcra &= MMCRA_SDAR_MODE_NO_UPDATES; + else if (p9_SDAR_MODE(event)) + *mmcra |= p9_SDAR_MODE(event) << MMCRA_SDAR_MODE_SHIFT; + else + *mmcra |= MMCRA_SDAR_MODE_DCACHE; + } else + *mmcra |= MMCRA_SDAR_MODE_TLB; +} + +static u64 thresh_cmp_val(u64 value) +{ + if (cpu_has_feature(CPU_FTR_ARCH_300)) + return value << p9_MMCRA_THR_CMP_SHIFT; + + return value << MMCRA_THR_CMP_SHIFT; +} + +static unsigned long combine_from_event(u64 event) +{ + if (cpu_has_feature(CPU_FTR_ARCH_300)) + return p9_EVENT_COMBINE(event); + + return EVENT_COMBINE(event); +} + +static unsigned long combine_shift(unsigned long pmc) +{ + if (cpu_has_feature(CPU_FTR_ARCH_300)) + return p9_MMCR1_COMBINE_SHIFT(pmc); + + return MMCR1_COMBINE_SHIFT(pmc); +} + +static inline bool event_is_threshold(u64 event) +{ + return (event >> EVENT_THR_SEL_SHIFT) & EVENT_THR_SEL_MASK; +} + +static bool is_thresh_cmp_valid(u64 event) +{ + unsigned int cmp, exp; + + /* + * Check the mantissa upper two bits are not zero, unless the + * exponent is also zero. See the THRESH_CMP_MANTISSA doc. + */ + cmp = (event >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK; + exp = cmp >> 7; + + if (exp && (cmp & 0x60) == 0) + return false; + + return true; +} + +static unsigned int dc_ic_rld_quad_l1_sel(u64 event) +{ + unsigned int cache; + + cache = (event >> EVENT_CACHE_SEL_SHIFT) & MMCR1_DC_IC_QUAL_MASK; + return cache; +} + +static inline u64 isa207_find_source(u64 idx, u32 sub_idx) +{ + u64 ret = PERF_MEM_NA; + + switch(idx) { + case 0: + /* Nothing to do */ + break; + case 1: + ret = PH(LVL, L1); + break; + case 2: + ret = PH(LVL, L2); + break; + case 3: + ret = PH(LVL, L3); + break; + case 4: + if (sub_idx <= 1) + ret = PH(LVL, LOC_RAM); + else if (sub_idx > 1 && sub_idx <= 2) + ret = PH(LVL, REM_RAM1); + else + ret = PH(LVL, REM_RAM2); + ret |= P(SNOOP, HIT); + break; + case 5: + ret = PH(LVL, REM_CCE1); + if ((sub_idx == 0) || (sub_idx == 2) || (sub_idx == 4)) + ret |= P(SNOOP, HIT); + else if ((sub_idx == 1) || (sub_idx == 3) || (sub_idx == 5)) + ret |= P(SNOOP, HITM); + break; + case 6: + ret = PH(LVL, REM_CCE2); + if ((sub_idx == 0) || (sub_idx == 2)) + ret |= P(SNOOP, HIT); + else if ((sub_idx == 1) || (sub_idx == 3)) + ret |= P(SNOOP, HITM); + break; + case 7: + ret = PM(LVL, L1); + break; + } + + return ret; +} + +void isa207_get_mem_data_src(union perf_mem_data_src *dsrc, u32 flags, + struct pt_regs *regs) +{ + u64 idx; + u32 sub_idx; + u64 sier; + u64 val; + + /* Skip if no SIER support */ + if (!(flags & PPMU_HAS_SIER)) { + dsrc->val = 0; + return; + } + + sier = mfspr(SPRN_SIER); + val = (sier & ISA207_SIER_TYPE_MASK) >> ISA207_SIER_TYPE_SHIFT; + if (val == 1 || val == 2) { + idx = (sier & ISA207_SIER_LDST_MASK) >> ISA207_SIER_LDST_SHIFT; + sub_idx = (sier & ISA207_SIER_DATA_SRC_MASK) >> ISA207_SIER_DATA_SRC_SHIFT; + + dsrc->val = isa207_find_source(idx, sub_idx); + dsrc->val |= (val == 1) ? P(OP, LOAD) : P(OP, STORE); + } +} + +void isa207_get_mem_weight(u64 *weight) +{ + u64 mmcra = mfspr(SPRN_MMCRA); + u64 exp = MMCRA_THR_CTR_EXP(mmcra); + u64 mantissa = MMCRA_THR_CTR_MANT(mmcra); + u64 sier = mfspr(SPRN_SIER); + u64 val = (sier & ISA207_SIER_TYPE_MASK) >> ISA207_SIER_TYPE_SHIFT; + + if (val == 0 || val == 7) + *weight = 0; + else + *weight = mantissa << (2 * exp); +} + +int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp) +{ + unsigned int unit, pmc, cache, ebb; + unsigned long mask, value; + + mask = value = 0; + + if (!is_event_valid(event)) + return -1; + + pmc = (event >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK; + unit = (event >> EVENT_UNIT_SHIFT) & EVENT_UNIT_MASK; + cache = (event >> EVENT_CACHE_SEL_SHIFT) & EVENT_CACHE_SEL_MASK; + ebb = (event >> EVENT_EBB_SHIFT) & EVENT_EBB_MASK; + + if (pmc) { + u64 base_event; + + if (pmc > 6) + return -1; + + /* Ignore Linux defined bits when checking event below */ + base_event = event & ~EVENT_LINUX_MASK; + + if (pmc >= 5 && base_event != 0x500fa && + base_event != 0x600f4) + return -1; + + mask |= CNST_PMC_MASK(pmc); + value |= CNST_PMC_VAL(pmc); + + /* + * PMC5 and PMC6 are used to count cycles and instructions and + * they do not support most of the constraint bits. Add a check + * to exclude PMC5/6 from most of the constraints except for + * EBB/BHRB. + */ + if (pmc >= 5) + goto ebb_bhrb; + } + + if (pmc <= 4) { + /* + * Add to number of counters in use. Note this includes events with + * a PMC of 0 - they still need a PMC, it's just assigned later. + * Don't count events on PMC 5 & 6, there is only one valid event + * on each of those counters, and they are handled above. + */ + mask |= CNST_NC_MASK; + value |= CNST_NC_VAL; + } + + if (unit >= 6 && unit <= 9) { + /* + * L2/L3 events contain a cache selector field, which is + * supposed to be programmed into MMCRC. However MMCRC is only + * HV writable, and there is no API for guest kernels to modify + * it. The solution is for the hypervisor to initialise the + * field to zeroes, and for us to only ever allow events that + * have a cache selector of zero. The bank selector (bit 3) is + * irrelevant, as long as the rest of the value is 0. + */ + if (!cpu_has_feature(CPU_FTR_ARCH_300) && (cache & 0x7)) + return -1; + + } else if (cpu_has_feature(CPU_FTR_ARCH_300) || (event & EVENT_IS_L1)) { + mask |= CNST_L1_QUAL_MASK; + value |= CNST_L1_QUAL_VAL(cache); + } + + if (is_event_marked(event)) { + mask |= CNST_SAMPLE_MASK; + value |= CNST_SAMPLE_VAL(event >> EVENT_SAMPLE_SHIFT); + } + + if (cpu_has_feature(CPU_FTR_ARCH_300)) { + if (event_is_threshold(event) && is_thresh_cmp_valid(event)) { + mask |= CNST_THRESH_MASK; + value |= CNST_THRESH_VAL(event >> EVENT_THRESH_SHIFT); + } else if (event_is_threshold(event)) + return -1; + } else { + /* + * Special case for PM_MRK_FAB_RSP_MATCH and PM_MRK_FAB_RSP_MATCH_CYC, + * the threshold control bits are used for the match value. + */ + if (event_is_fab_match(event)) { + mask |= CNST_FAB_MATCH_MASK; + value |= CNST_FAB_MATCH_VAL(event >> EVENT_THR_CTL_SHIFT); + } else { + if (!is_thresh_cmp_valid(event)) + return -1; + + mask |= CNST_THRESH_MASK; + value |= CNST_THRESH_VAL(event >> EVENT_THRESH_SHIFT); + } + } + +ebb_bhrb: + if (!pmc && ebb) + /* EBB events must specify the PMC */ + return -1; + + if (event & EVENT_WANTS_BHRB) { + if (!ebb) + /* Only EBB events can request BHRB */ + return -1; + + mask |= CNST_IFM_MASK; + value |= CNST_IFM_VAL(event >> EVENT_IFM_SHIFT); + } + + /* + * All events must agree on EBB, either all request it or none. + * EBB events are pinned & exclusive, so this should never actually + * hit, but we leave it as a fallback in case. + */ + mask |= CNST_EBB_MASK; + value |= CNST_EBB_VAL(ebb); + + *maskp = mask; + *valp = value; + + return 0; +} + +int isa207_compute_mmcr(u64 event[], int n_ev, + unsigned int hwc[], unsigned long mmcr[], + struct perf_event *pevents[]) +{ + unsigned long mmcra, mmcr1, mmcr2, unit, combine, psel, cache, val; + unsigned int pmc, pmc_inuse; + int i; + + pmc_inuse = 0; + + /* First pass to count resource use */ + for (i = 0; i < n_ev; ++i) { + pmc = (event[i] >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK; + if (pmc) + pmc_inuse |= 1 << pmc; + } + + mmcra = mmcr1 = mmcr2 = 0; + + /* Second pass: assign PMCs, set all MMCR1 fields */ + for (i = 0; i < n_ev; ++i) { + pmc = (event[i] >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK; + unit = (event[i] >> EVENT_UNIT_SHIFT) & EVENT_UNIT_MASK; + combine = combine_from_event(event[i]); + psel = event[i] & EVENT_PSEL_MASK; + + if (!pmc) { + for (pmc = 1; pmc <= 4; ++pmc) { + if (!(pmc_inuse & (1 << pmc))) + break; + } + + pmc_inuse |= 1 << pmc; + } + + if (pmc <= 4) { + mmcr1 |= unit << MMCR1_UNIT_SHIFT(pmc); + mmcr1 |= combine << combine_shift(pmc); + mmcr1 |= psel << MMCR1_PMCSEL_SHIFT(pmc); + } + + /* In continuous sampling mode, update SDAR on TLB miss */ + mmcra_sdar_mode(event[i], &mmcra); + + if (cpu_has_feature(CPU_FTR_ARCH_300)) { + cache = dc_ic_rld_quad_l1_sel(event[i]); + mmcr1 |= (cache) << MMCR1_DC_IC_QUAL_SHIFT; + } else { + if (event[i] & EVENT_IS_L1) { + cache = dc_ic_rld_quad_l1_sel(event[i]); + mmcr1 |= (cache) << MMCR1_DC_IC_QUAL_SHIFT; + } + } + + if (is_event_marked(event[i])) { + mmcra |= MMCRA_SAMPLE_ENABLE; + + val = (event[i] >> EVENT_SAMPLE_SHIFT) & EVENT_SAMPLE_MASK; + if (val) { + mmcra |= (val & 3) << MMCRA_SAMP_MODE_SHIFT; + mmcra |= (val >> 2) << MMCRA_SAMP_ELIG_SHIFT; + } + } + + /* + * PM_MRK_FAB_RSP_MATCH and PM_MRK_FAB_RSP_MATCH_CYC, + * the threshold bits are used for the match value. + */ + if (!cpu_has_feature(CPU_FTR_ARCH_300) && event_is_fab_match(event[i])) { + mmcr1 |= ((event[i] >> EVENT_THR_CTL_SHIFT) & + EVENT_THR_CTL_MASK) << MMCR1_FAB_SHIFT; + } else { + val = (event[i] >> EVENT_THR_CTL_SHIFT) & EVENT_THR_CTL_MASK; + mmcra |= val << MMCRA_THR_CTL_SHIFT; + val = (event[i] >> EVENT_THR_SEL_SHIFT) & EVENT_THR_SEL_MASK; + mmcra |= val << MMCRA_THR_SEL_SHIFT; + val = (event[i] >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK; + mmcra |= thresh_cmp_val(val); + } + + if (event[i] & EVENT_WANTS_BHRB) { + val = (event[i] >> EVENT_IFM_SHIFT) & EVENT_IFM_MASK; + mmcra |= val << MMCRA_IFM_SHIFT; + } + + if (pevents[i]->attr.exclude_user) + mmcr2 |= MMCR2_FCP(pmc); + + if (pevents[i]->attr.exclude_hv) + mmcr2 |= MMCR2_FCH(pmc); + + if (pevents[i]->attr.exclude_kernel) { + if (cpu_has_feature(CPU_FTR_HVMODE)) + mmcr2 |= MMCR2_FCH(pmc); + else + mmcr2 |= MMCR2_FCS(pmc); + } + + hwc[i] = pmc - 1; + } + + /* Return MMCRx values */ + mmcr[0] = 0; + + /* pmc_inuse is 1-based */ + if (pmc_inuse & 2) + mmcr[0] = MMCR0_PMC1CE; + + if (pmc_inuse & 0x7c) + mmcr[0] |= MMCR0_PMCjCE; + + /* If we're not using PMC 5 or 6, freeze them */ + if (!(pmc_inuse & 0x60)) + mmcr[0] |= MMCR0_FC56; + + mmcr[1] = mmcr1; + mmcr[2] = mmcra; + mmcr[3] = mmcr2; + + return 0; +} + +void isa207_disable_pmc(unsigned int pmc, unsigned long mmcr[]) +{ + if (pmc <= 3) + mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SHIFT(pmc + 1)); +} + +static int find_alternative(u64 event, const unsigned int ev_alt[][MAX_ALT], int size) +{ + int i, j; + + for (i = 0; i < size; ++i) { + if (event < ev_alt[i][0]) + break; + + for (j = 0; j < MAX_ALT && ev_alt[i][j]; ++j) + if (event == ev_alt[i][j]) + return i; + } + + return -1; +} + +int isa207_get_alternatives(u64 event, u64 alt[], int size, unsigned int flags, + const unsigned int ev_alt[][MAX_ALT]) +{ + int i, j, num_alt = 0; + u64 alt_event; + + alt[num_alt++] = event; + i = find_alternative(event, ev_alt, size); + if (i >= 0) { + /* Filter out the original event, it's already in alt[0] */ + for (j = 0; j < MAX_ALT; ++j) { + alt_event = ev_alt[i][j]; + if (alt_event && alt_event != event) + alt[num_alt++] = alt_event; + } + } + + if (flags & PPMU_ONLY_COUNT_RUN) { + /* + * We're only counting in RUN state, so PM_CYC is equivalent to + * PM_RUN_CYC and PM_INST_CMPL === PM_RUN_INST_CMPL. + */ + j = num_alt; + for (i = 0; i < num_alt; ++i) { + switch (alt[i]) { + case 0x1e: /* PMC_CYC */ + alt[j++] = 0x600f4; /* PM_RUN_CYC */ + break; + case 0x600f4: + alt[j++] = 0x1e; + break; + case 0x2: /* PM_INST_CMPL */ + alt[j++] = 0x500fa; /* PM_RUN_INST_CMPL */ + break; + case 0x500fa: + alt[j++] = 0x2; + break; + } + } + num_alt = j; + } + + return num_alt; +} -- cgit v1.2.3