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-rw-r--r--arch/powerpc/perf/power10-pmu.c419
1 files changed, 419 insertions, 0 deletions
diff --git a/arch/powerpc/perf/power10-pmu.c b/arch/powerpc/perf/power10-pmu.c
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index 000000000000..f7cff7f36a1c
--- /dev/null
+++ b/arch/powerpc/perf/power10-pmu.c
@@ -0,0 +1,419 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Performance counter support for POWER10 processors.
+ *
+ * Copyright 2020 Madhavan Srinivasan, IBM Corporation.
+ * Copyright 2020 Athira Rajeev, IBM Corporation.
+ */
+
+#define pr_fmt(fmt) "power10-pmu: " fmt
+
+#include "isa207-common.h"
+#include "internal.h"
+
+/*
+ * Raw event encoding for Power10:
+ *
+ * 60 56 52 48 44 40 36 32
+ * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
+ * | | [ ] [ src_match ] [ src_mask ] | [ ] [ l2l3_sel ] [ thresh_ctl ]
+ * | | | | | |
+ * | | *- IFM (Linux) | | thresh start/stop -*
+ * | *- BHRB (Linux) | src_sel
+ * *- EBB (Linux) *invert_bit
+ *
+ * 28 24 20 16 12 8 4 0
+ * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
+ * [ ] [ sample ] [ ] [ ] [ pmc ] [unit ] [ ] m [ pmcxsel ]
+ * | | | | | |
+ * | | | | | *- mark
+ * | | | *- L1/L2/L3 cache_sel |
+ * | | sdar_mode |
+ * | *- 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 l2l3_sel:
+ * MMCR2[56:60] = l2l3_sel[0:4]
+ *
+ * MMCR1[16] = cache_sel[0]
+ * MMCR1[17] = cache_sel[1]
+ *
+ * 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] = sdar_mode[0:1]
+ */
+
+/*
+ * Some power10 event codes.
+ */
+#define EVENT(_name, _code) enum{_name = _code}
+
+#include "power10-events-list.h"
+
+#undef EVENT
+
+/* MMCRA IFM bits - POWER10 */
+#define POWER10_MMCRA_IFM1 0x0000000040000000UL
+#define POWER10_MMCRA_IFM2 0x0000000080000000UL
+#define POWER10_MMCRA_IFM3 0x00000000C0000000UL
+#define POWER10_MMCRA_BHRB_MASK 0x00000000C0000000UL
+
+/* Table of alternatives, sorted by column 0 */
+static const unsigned int power10_event_alternatives[][MAX_ALT] = {
+ { PM_RUN_CYC_ALT, PM_RUN_CYC },
+ { PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL },
+};
+
+static int power10_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+ int num_alt = 0;
+
+ num_alt = isa207_get_alternatives(event, alt,
+ ARRAY_SIZE(power10_event_alternatives), flags,
+ power10_event_alternatives);
+
+ return num_alt;
+}
+
+GENERIC_EVENT_ATTR(cpu-cycles, PM_RUN_CYC);
+GENERIC_EVENT_ATTR(instructions, PM_RUN_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);
+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);
+CACHE_EVENT_ATTR(L1-dcache-loads, PM_LD_REF_L1);
+CACHE_EVENT_ATTR(L1-dcache-prefetches, PM_LD_PREFETCH_CACHE_LINE_MISS);
+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_REQ);
+CACHE_EVENT_ATTR(LLC-load-misses, PM_DATA_FROM_L3MISS);
+CACHE_EVENT_ATTR(LLC-loads, PM_DATA_FROM_L3);
+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 *power10_events_attr[] = {
+ GENERIC_EVENT_PTR(PM_RUN_CYC),
+ GENERIC_EVENT_PTR(PM_RUN_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),
+ GENERIC_EVENT_PTR(MEM_LOADS),
+ GENERIC_EVENT_PTR(MEM_STORES),
+ CACHE_EVENT_PTR(PM_LD_MISS_L1),
+ CACHE_EVENT_PTR(PM_LD_REF_L1),
+ CACHE_EVENT_PTR(PM_LD_PREFETCH_CACHE_LINE_MISS),
+ 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_REQ),
+ CACHE_EVENT_PTR(PM_DATA_FROM_L3MISS),
+ CACHE_EVENT_PTR(PM_DATA_FROM_L3),
+ 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 struct attribute_group power10_pmu_events_group = {
+ .name = "events",
+ .attrs = power10_events_attr,
+};
+
+PMU_FORMAT_ATTR(event, "config:0-59");
+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:20-21");
+PMU_FORMAT_ATTR(sdar_mode, "config:22-23");
+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(l2l3_sel, "config:40-44");
+PMU_FORMAT_ATTR(src_sel, "config:45-46");
+PMU_FORMAT_ATTR(invert_bit, "config:47");
+PMU_FORMAT_ATTR(src_mask, "config:48-53");
+PMU_FORMAT_ATTR(src_match, "config:54-59");
+
+static struct attribute *power10_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_sdar_mode.attr,
+ &format_attr_sample_mode.attr,
+ &format_attr_thresh_sel.attr,
+ &format_attr_thresh_stop.attr,
+ &format_attr_thresh_start.attr,
+ &format_attr_l2l3_sel.attr,
+ &format_attr_src_sel.attr,
+ &format_attr_invert_bit.attr,
+ &format_attr_src_mask.attr,
+ &format_attr_src_match.attr,
+ NULL,
+};
+
+static struct attribute_group power10_pmu_format_group = {
+ .name = "format",
+ .attrs = power10_pmu_format_attr,
+};
+
+static const struct attribute_group *power10_pmu_attr_groups[] = {
+ &power10_pmu_format_group,
+ &power10_pmu_events_group,
+ NULL,
+};
+
+static int power10_generic_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = PM_RUN_CYC,
+ [PERF_COUNT_HW_INSTRUCTIONS] = PM_RUN_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,
+};
+
+static u64 power10_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) {
+ pmu_bhrb_filter |= POWER10_MMCRA_IFM2;
+ return pmu_bhrb_filter;
+ }
+
+ if (branch_sample_type & PERF_SAMPLE_BRANCH_COND) {
+ pmu_bhrb_filter |= POWER10_MMCRA_IFM3;
+ return pmu_bhrb_filter;
+ }
+
+ if (branch_sample_type & PERF_SAMPLE_BRANCH_CALL)
+ return -1;
+
+ if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_CALL) {
+ pmu_bhrb_filter |= POWER10_MMCRA_IFM1;
+ return pmu_bhrb_filter;
+ }
+
+ /* Every thing else is unsupported */
+ return -1;
+}
+
+static void power10_config_bhrb(u64 pmu_bhrb_filter)
+{
+ pmu_bhrb_filter &= POWER10_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 power10_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_LD_PREFETCH_CACHE_LINE_MISS,
+ [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_INST_FROM_L1MISS,
+ [C(RESULT_MISS)] = -1,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = PM_IC_PREF_REQ,
+ [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)] = -1,
+ [C(RESULT_MISS)] = -1,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = -1,
+ [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 power10_pmu = {
+ .name = "POWER10",
+ .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 = power10_config_bhrb,
+ .bhrb_filter_map = power10_bhrb_filter_map,
+ .get_constraint = isa207_get_constraint,
+ .get_alternatives = power10_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 |
+ PPMU_ARCH_31,
+ .n_generic = ARRAY_SIZE(power10_generic_events),
+ .generic_events = power10_generic_events,
+ .cache_events = &power10_cache_events,
+ .attr_groups = power10_pmu_attr_groups,
+ .bhrb_nr = 32,
+};
+
+int init_power10_pmu(void)
+{
+ int rc;
+
+ /* Comes from cpu_specs[] */
+ if (!cur_cpu_spec->oprofile_cpu_type ||
+ strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power10"))
+ return -ENODEV;
+
+ rc = register_power_pmu(&power10_pmu);
+ if (rc)
+ return rc;
+
+ /* Tell userspace that EBB is supported */
+ cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB;
+
+ return 0;
+}