1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ARMv8 PMUv3 Performance Events handling code. 4 * 5 * Copyright (C) 2012 ARM Limited 6 * Author: Will Deacon <will.deacon@arm.com> 7 * 8 * This code is based heavily on the ARMv7 perf event code. 9 */ 10 11 #include <asm/irq_regs.h> 12 #include <asm/perf_event.h> 13 #include <asm/virt.h> 14 15 #include <clocksource/arm_arch_timer.h> 16 17 #include <linux/acpi.h> 18 #include <linux/clocksource.h> 19 #include <linux/of.h> 20 #include <linux/perf/arm_pmu.h> 21 #include <linux/perf/arm_pmuv3.h> 22 #include <linux/platform_device.h> 23 #include <linux/sched_clock.h> 24 #include <linux/smp.h> 25 #include <linux/nmi.h> 26 27 #include <asm/arm_pmuv3.h> 28 29 /* ARMv8 Cortex-A53 specific event types. */ 30 #define ARMV8_A53_PERFCTR_PREF_LINEFILL 0xC2 31 32 /* ARMv8 Cavium ThunderX specific event types. */ 33 #define ARMV8_THUNDER_PERFCTR_L1D_CACHE_MISS_ST 0xE9 34 #define ARMV8_THUNDER_PERFCTR_L1D_CACHE_PREF_ACCESS 0xEA 35 #define ARMV8_THUNDER_PERFCTR_L1D_CACHE_PREF_MISS 0xEB 36 #define ARMV8_THUNDER_PERFCTR_L1I_CACHE_PREF_ACCESS 0xEC 37 #define ARMV8_THUNDER_PERFCTR_L1I_CACHE_PREF_MISS 0xED 38 39 /* 40 * ARMv8 Architectural defined events, not all of these may 41 * be supported on any given implementation. Unsupported events will 42 * be disabled at run-time based on the PMCEID registers. 43 */ 44 static const unsigned armv8_pmuv3_perf_map[PERF_COUNT_HW_MAX] = { 45 PERF_MAP_ALL_UNSUPPORTED, 46 [PERF_COUNT_HW_CPU_CYCLES] = ARMV8_PMUV3_PERFCTR_CPU_CYCLES, 47 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV8_PMUV3_PERFCTR_INST_RETIRED, 48 [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV8_PMUV3_PERFCTR_L1D_CACHE, 49 [PERF_COUNT_HW_CACHE_MISSES] = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL, 50 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED, 51 [PERF_COUNT_HW_BUS_CYCLES] = ARMV8_PMUV3_PERFCTR_BUS_CYCLES, 52 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV8_PMUV3_PERFCTR_STALL_FRONTEND, 53 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = ARMV8_PMUV3_PERFCTR_STALL_BACKEND, 54 }; 55 56 static const unsigned armv8_pmuv3_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] 57 [PERF_COUNT_HW_CACHE_OP_MAX] 58 [PERF_COUNT_HW_CACHE_RESULT_MAX] = { 59 PERF_CACHE_MAP_ALL_UNSUPPORTED, 60 61 [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1D_CACHE, 62 [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL, 63 64 [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1I_CACHE, 65 [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL, 66 67 [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1D_TLB_REFILL, 68 [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1D_TLB, 69 70 [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL, 71 [C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1I_TLB, 72 73 [C(LL)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_LL_CACHE_MISS_RD, 74 [C(LL)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_LL_CACHE_RD, 75 76 [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_BR_PRED, 77 [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED, 78 }; 79 80 static const unsigned armv8_a53_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] 81 [PERF_COUNT_HW_CACHE_OP_MAX] 82 [PERF_COUNT_HW_CACHE_RESULT_MAX] = { 83 PERF_CACHE_MAP_ALL_UNSUPPORTED, 84 85 [C(L1D)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV8_A53_PERFCTR_PREF_LINEFILL, 86 87 [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD, 88 [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR, 89 }; 90 91 static const unsigned armv8_a57_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] 92 [PERF_COUNT_HW_CACHE_OP_MAX] 93 [PERF_COUNT_HW_CACHE_RESULT_MAX] = { 94 PERF_CACHE_MAP_ALL_UNSUPPORTED, 95 96 [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD, 97 [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD, 98 [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR, 99 [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR, 100 101 [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD, 102 [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR, 103 104 [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD, 105 [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR, 106 }; 107 108 static const unsigned armv8_a73_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] 109 [PERF_COUNT_HW_CACHE_OP_MAX] 110 [PERF_COUNT_HW_CACHE_RESULT_MAX] = { 111 PERF_CACHE_MAP_ALL_UNSUPPORTED, 112 113 [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD, 114 [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR, 115 }; 116 117 static const unsigned armv8_thunder_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] 118 [PERF_COUNT_HW_CACHE_OP_MAX] 119 [PERF_COUNT_HW_CACHE_RESULT_MAX] = { 120 PERF_CACHE_MAP_ALL_UNSUPPORTED, 121 122 [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD, 123 [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD, 124 [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR, 125 [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_THUNDER_PERFCTR_L1D_CACHE_MISS_ST, 126 [C(L1D)][C(OP_PREFETCH)][C(RESULT_ACCESS)] = ARMV8_THUNDER_PERFCTR_L1D_CACHE_PREF_ACCESS, 127 [C(L1D)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV8_THUNDER_PERFCTR_L1D_CACHE_PREF_MISS, 128 129 [C(L1I)][C(OP_PREFETCH)][C(RESULT_ACCESS)] = ARMV8_THUNDER_PERFCTR_L1I_CACHE_PREF_ACCESS, 130 [C(L1I)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV8_THUNDER_PERFCTR_L1I_CACHE_PREF_MISS, 131 132 [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD, 133 [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD, 134 [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR, 135 [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR, 136 }; 137 138 static const unsigned armv8_vulcan_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] 139 [PERF_COUNT_HW_CACHE_OP_MAX] 140 [PERF_COUNT_HW_CACHE_RESULT_MAX] = { 141 PERF_CACHE_MAP_ALL_UNSUPPORTED, 142 143 [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD, 144 [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD, 145 [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR, 146 [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR, 147 148 [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD, 149 [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR, 150 [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD, 151 [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR, 152 153 [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD, 154 [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR, 155 }; 156 157 static ssize_t 158 armv8pmu_events_sysfs_show(struct device *dev, 159 struct device_attribute *attr, char *page) 160 { 161 struct perf_pmu_events_attr *pmu_attr; 162 163 pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr); 164 165 return sprintf(page, "event=0x%04llx\n", pmu_attr->id); 166 } 167 168 #define ARMV8_EVENT_ATTR(name, config) \ 169 PMU_EVENT_ATTR_ID(name, armv8pmu_events_sysfs_show, config) 170 171 static struct attribute *armv8_pmuv3_event_attrs[] = { 172 ARMV8_EVENT_ATTR(sw_incr, ARMV8_PMUV3_PERFCTR_SW_INCR), 173 ARMV8_EVENT_ATTR(l1i_cache_refill, ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL), 174 ARMV8_EVENT_ATTR(l1i_tlb_refill, ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL), 175 ARMV8_EVENT_ATTR(l1d_cache_refill, ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL), 176 ARMV8_EVENT_ATTR(l1d_cache, ARMV8_PMUV3_PERFCTR_L1D_CACHE), 177 ARMV8_EVENT_ATTR(l1d_tlb_refill, ARMV8_PMUV3_PERFCTR_L1D_TLB_REFILL), 178 ARMV8_EVENT_ATTR(ld_retired, ARMV8_PMUV3_PERFCTR_LD_RETIRED), 179 ARMV8_EVENT_ATTR(st_retired, ARMV8_PMUV3_PERFCTR_ST_RETIRED), 180 ARMV8_EVENT_ATTR(inst_retired, ARMV8_PMUV3_PERFCTR_INST_RETIRED), 181 ARMV8_EVENT_ATTR(exc_taken, ARMV8_PMUV3_PERFCTR_EXC_TAKEN), 182 ARMV8_EVENT_ATTR(exc_return, ARMV8_PMUV3_PERFCTR_EXC_RETURN), 183 ARMV8_EVENT_ATTR(cid_write_retired, ARMV8_PMUV3_PERFCTR_CID_WRITE_RETIRED), 184 ARMV8_EVENT_ATTR(pc_write_retired, ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED), 185 ARMV8_EVENT_ATTR(br_immed_retired, ARMV8_PMUV3_PERFCTR_BR_IMMED_RETIRED), 186 ARMV8_EVENT_ATTR(br_return_retired, ARMV8_PMUV3_PERFCTR_BR_RETURN_RETIRED), 187 ARMV8_EVENT_ATTR(unaligned_ldst_retired, ARMV8_PMUV3_PERFCTR_UNALIGNED_LDST_RETIRED), 188 ARMV8_EVENT_ATTR(br_mis_pred, ARMV8_PMUV3_PERFCTR_BR_MIS_PRED), 189 ARMV8_EVENT_ATTR(cpu_cycles, ARMV8_PMUV3_PERFCTR_CPU_CYCLES), 190 ARMV8_EVENT_ATTR(br_pred, ARMV8_PMUV3_PERFCTR_BR_PRED), 191 ARMV8_EVENT_ATTR(mem_access, ARMV8_PMUV3_PERFCTR_MEM_ACCESS), 192 ARMV8_EVENT_ATTR(l1i_cache, ARMV8_PMUV3_PERFCTR_L1I_CACHE), 193 ARMV8_EVENT_ATTR(l1d_cache_wb, ARMV8_PMUV3_PERFCTR_L1D_CACHE_WB), 194 ARMV8_EVENT_ATTR(l2d_cache, ARMV8_PMUV3_PERFCTR_L2D_CACHE), 195 ARMV8_EVENT_ATTR(l2d_cache_refill, ARMV8_PMUV3_PERFCTR_L2D_CACHE_REFILL), 196 ARMV8_EVENT_ATTR(l2d_cache_wb, ARMV8_PMUV3_PERFCTR_L2D_CACHE_WB), 197 ARMV8_EVENT_ATTR(bus_access, ARMV8_PMUV3_PERFCTR_BUS_ACCESS), 198 ARMV8_EVENT_ATTR(memory_error, ARMV8_PMUV3_PERFCTR_MEMORY_ERROR), 199 ARMV8_EVENT_ATTR(inst_spec, ARMV8_PMUV3_PERFCTR_INST_SPEC), 200 ARMV8_EVENT_ATTR(ttbr_write_retired, ARMV8_PMUV3_PERFCTR_TTBR_WRITE_RETIRED), 201 ARMV8_EVENT_ATTR(bus_cycles, ARMV8_PMUV3_PERFCTR_BUS_CYCLES), 202 /* Don't expose the chain event in /sys, since it's useless in isolation */ 203 ARMV8_EVENT_ATTR(l1d_cache_allocate, ARMV8_PMUV3_PERFCTR_L1D_CACHE_ALLOCATE), 204 ARMV8_EVENT_ATTR(l2d_cache_allocate, ARMV8_PMUV3_PERFCTR_L2D_CACHE_ALLOCATE), 205 ARMV8_EVENT_ATTR(br_retired, ARMV8_PMUV3_PERFCTR_BR_RETIRED), 206 ARMV8_EVENT_ATTR(br_mis_pred_retired, ARMV8_PMUV3_PERFCTR_BR_MIS_PRED_RETIRED), 207 ARMV8_EVENT_ATTR(stall_frontend, ARMV8_PMUV3_PERFCTR_STALL_FRONTEND), 208 ARMV8_EVENT_ATTR(stall_backend, ARMV8_PMUV3_PERFCTR_STALL_BACKEND), 209 ARMV8_EVENT_ATTR(l1d_tlb, ARMV8_PMUV3_PERFCTR_L1D_TLB), 210 ARMV8_EVENT_ATTR(l1i_tlb, ARMV8_PMUV3_PERFCTR_L1I_TLB), 211 ARMV8_EVENT_ATTR(l2i_cache, ARMV8_PMUV3_PERFCTR_L2I_CACHE), 212 ARMV8_EVENT_ATTR(l2i_cache_refill, ARMV8_PMUV3_PERFCTR_L2I_CACHE_REFILL), 213 ARMV8_EVENT_ATTR(l3d_cache_allocate, ARMV8_PMUV3_PERFCTR_L3D_CACHE_ALLOCATE), 214 ARMV8_EVENT_ATTR(l3d_cache_refill, ARMV8_PMUV3_PERFCTR_L3D_CACHE_REFILL), 215 ARMV8_EVENT_ATTR(l3d_cache, ARMV8_PMUV3_PERFCTR_L3D_CACHE), 216 ARMV8_EVENT_ATTR(l3d_cache_wb, ARMV8_PMUV3_PERFCTR_L3D_CACHE_WB), 217 ARMV8_EVENT_ATTR(l2d_tlb_refill, ARMV8_PMUV3_PERFCTR_L2D_TLB_REFILL), 218 ARMV8_EVENT_ATTR(l2i_tlb_refill, ARMV8_PMUV3_PERFCTR_L2I_TLB_REFILL), 219 ARMV8_EVENT_ATTR(l2d_tlb, ARMV8_PMUV3_PERFCTR_L2D_TLB), 220 ARMV8_EVENT_ATTR(l2i_tlb, ARMV8_PMUV3_PERFCTR_L2I_TLB), 221 ARMV8_EVENT_ATTR(remote_access, ARMV8_PMUV3_PERFCTR_REMOTE_ACCESS), 222 ARMV8_EVENT_ATTR(ll_cache, ARMV8_PMUV3_PERFCTR_LL_CACHE), 223 ARMV8_EVENT_ATTR(ll_cache_miss, ARMV8_PMUV3_PERFCTR_LL_CACHE_MISS), 224 ARMV8_EVENT_ATTR(dtlb_walk, ARMV8_PMUV3_PERFCTR_DTLB_WALK), 225 ARMV8_EVENT_ATTR(itlb_walk, ARMV8_PMUV3_PERFCTR_ITLB_WALK), 226 ARMV8_EVENT_ATTR(ll_cache_rd, ARMV8_PMUV3_PERFCTR_LL_CACHE_RD), 227 ARMV8_EVENT_ATTR(ll_cache_miss_rd, ARMV8_PMUV3_PERFCTR_LL_CACHE_MISS_RD), 228 ARMV8_EVENT_ATTR(remote_access_rd, ARMV8_PMUV3_PERFCTR_REMOTE_ACCESS_RD), 229 ARMV8_EVENT_ATTR(l1d_cache_lmiss_rd, ARMV8_PMUV3_PERFCTR_L1D_CACHE_LMISS_RD), 230 ARMV8_EVENT_ATTR(op_retired, ARMV8_PMUV3_PERFCTR_OP_RETIRED), 231 ARMV8_EVENT_ATTR(op_spec, ARMV8_PMUV3_PERFCTR_OP_SPEC), 232 ARMV8_EVENT_ATTR(stall, ARMV8_PMUV3_PERFCTR_STALL), 233 ARMV8_EVENT_ATTR(stall_slot_backend, ARMV8_PMUV3_PERFCTR_STALL_SLOT_BACKEND), 234 ARMV8_EVENT_ATTR(stall_slot_frontend, ARMV8_PMUV3_PERFCTR_STALL_SLOT_FRONTEND), 235 ARMV8_EVENT_ATTR(stall_slot, ARMV8_PMUV3_PERFCTR_STALL_SLOT), 236 ARMV8_EVENT_ATTR(sample_pop, ARMV8_SPE_PERFCTR_SAMPLE_POP), 237 ARMV8_EVENT_ATTR(sample_feed, ARMV8_SPE_PERFCTR_SAMPLE_FEED), 238 ARMV8_EVENT_ATTR(sample_filtrate, ARMV8_SPE_PERFCTR_SAMPLE_FILTRATE), 239 ARMV8_EVENT_ATTR(sample_collision, ARMV8_SPE_PERFCTR_SAMPLE_COLLISION), 240 ARMV8_EVENT_ATTR(cnt_cycles, ARMV8_AMU_PERFCTR_CNT_CYCLES), 241 ARMV8_EVENT_ATTR(stall_backend_mem, ARMV8_AMU_PERFCTR_STALL_BACKEND_MEM), 242 ARMV8_EVENT_ATTR(l1i_cache_lmiss, ARMV8_PMUV3_PERFCTR_L1I_CACHE_LMISS), 243 ARMV8_EVENT_ATTR(l2d_cache_lmiss_rd, ARMV8_PMUV3_PERFCTR_L2D_CACHE_LMISS_RD), 244 ARMV8_EVENT_ATTR(l2i_cache_lmiss, ARMV8_PMUV3_PERFCTR_L2I_CACHE_LMISS), 245 ARMV8_EVENT_ATTR(l3d_cache_lmiss_rd, ARMV8_PMUV3_PERFCTR_L3D_CACHE_LMISS_RD), 246 ARMV8_EVENT_ATTR(trb_wrap, ARMV8_PMUV3_PERFCTR_TRB_WRAP), 247 ARMV8_EVENT_ATTR(trb_trig, ARMV8_PMUV3_PERFCTR_TRB_TRIG), 248 ARMV8_EVENT_ATTR(trcextout0, ARMV8_PMUV3_PERFCTR_TRCEXTOUT0), 249 ARMV8_EVENT_ATTR(trcextout1, ARMV8_PMUV3_PERFCTR_TRCEXTOUT1), 250 ARMV8_EVENT_ATTR(trcextout2, ARMV8_PMUV3_PERFCTR_TRCEXTOUT2), 251 ARMV8_EVENT_ATTR(trcextout3, ARMV8_PMUV3_PERFCTR_TRCEXTOUT3), 252 ARMV8_EVENT_ATTR(cti_trigout4, ARMV8_PMUV3_PERFCTR_CTI_TRIGOUT4), 253 ARMV8_EVENT_ATTR(cti_trigout5, ARMV8_PMUV3_PERFCTR_CTI_TRIGOUT5), 254 ARMV8_EVENT_ATTR(cti_trigout6, ARMV8_PMUV3_PERFCTR_CTI_TRIGOUT6), 255 ARMV8_EVENT_ATTR(cti_trigout7, ARMV8_PMUV3_PERFCTR_CTI_TRIGOUT7), 256 ARMV8_EVENT_ATTR(ldst_align_lat, ARMV8_PMUV3_PERFCTR_LDST_ALIGN_LAT), 257 ARMV8_EVENT_ATTR(ld_align_lat, ARMV8_PMUV3_PERFCTR_LD_ALIGN_LAT), 258 ARMV8_EVENT_ATTR(st_align_lat, ARMV8_PMUV3_PERFCTR_ST_ALIGN_LAT), 259 ARMV8_EVENT_ATTR(mem_access_checked, ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED), 260 ARMV8_EVENT_ATTR(mem_access_checked_rd, ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED_RD), 261 ARMV8_EVENT_ATTR(mem_access_checked_wr, ARMV8_MTE_PERFCTR_MEM_ACCESS_CHECKED_WR), 262 NULL, 263 }; 264 265 static umode_t 266 armv8pmu_event_attr_is_visible(struct kobject *kobj, 267 struct attribute *attr, int unused) 268 { 269 struct device *dev = kobj_to_dev(kobj); 270 struct pmu *pmu = dev_get_drvdata(dev); 271 struct arm_pmu *cpu_pmu = container_of(pmu, struct arm_pmu, pmu); 272 struct perf_pmu_events_attr *pmu_attr; 273 274 pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr.attr); 275 276 if (pmu_attr->id < ARMV8_PMUV3_MAX_COMMON_EVENTS && 277 test_bit(pmu_attr->id, cpu_pmu->pmceid_bitmap)) 278 return attr->mode; 279 280 if (pmu_attr->id >= ARMV8_PMUV3_EXT_COMMON_EVENT_BASE) { 281 u64 id = pmu_attr->id - ARMV8_PMUV3_EXT_COMMON_EVENT_BASE; 282 283 if (id < ARMV8_PMUV3_MAX_COMMON_EVENTS && 284 test_bit(id, cpu_pmu->pmceid_ext_bitmap)) 285 return attr->mode; 286 } 287 288 return 0; 289 } 290 291 static const struct attribute_group armv8_pmuv3_events_attr_group = { 292 .name = "events", 293 .attrs = armv8_pmuv3_event_attrs, 294 .is_visible = armv8pmu_event_attr_is_visible, 295 }; 296 297 PMU_FORMAT_ATTR(event, "config:0-15"); 298 PMU_FORMAT_ATTR(long, "config1:0"); 299 PMU_FORMAT_ATTR(rdpmc, "config1:1"); 300 301 static int sysctl_perf_user_access __read_mostly; 302 303 static inline bool armv8pmu_event_is_64bit(struct perf_event *event) 304 { 305 return event->attr.config1 & 0x1; 306 } 307 308 static inline bool armv8pmu_event_want_user_access(struct perf_event *event) 309 { 310 return event->attr.config1 & 0x2; 311 } 312 313 static struct attribute *armv8_pmuv3_format_attrs[] = { 314 &format_attr_event.attr, 315 &format_attr_long.attr, 316 &format_attr_rdpmc.attr, 317 NULL, 318 }; 319 320 static const struct attribute_group armv8_pmuv3_format_attr_group = { 321 .name = "format", 322 .attrs = armv8_pmuv3_format_attrs, 323 }; 324 325 static ssize_t slots_show(struct device *dev, struct device_attribute *attr, 326 char *page) 327 { 328 struct pmu *pmu = dev_get_drvdata(dev); 329 struct arm_pmu *cpu_pmu = container_of(pmu, struct arm_pmu, pmu); 330 u32 slots = cpu_pmu->reg_pmmir & ARMV8_PMU_SLOTS_MASK; 331 332 return sysfs_emit(page, "0x%08x\n", slots); 333 } 334 335 static DEVICE_ATTR_RO(slots); 336 337 static ssize_t bus_slots_show(struct device *dev, struct device_attribute *attr, 338 char *page) 339 { 340 struct pmu *pmu = dev_get_drvdata(dev); 341 struct arm_pmu *cpu_pmu = container_of(pmu, struct arm_pmu, pmu); 342 u32 bus_slots = (cpu_pmu->reg_pmmir >> ARMV8_PMU_BUS_SLOTS_SHIFT) 343 & ARMV8_PMU_BUS_SLOTS_MASK; 344 345 return sysfs_emit(page, "0x%08x\n", bus_slots); 346 } 347 348 static DEVICE_ATTR_RO(bus_slots); 349 350 static ssize_t bus_width_show(struct device *dev, struct device_attribute *attr, 351 char *page) 352 { 353 struct pmu *pmu = dev_get_drvdata(dev); 354 struct arm_pmu *cpu_pmu = container_of(pmu, struct arm_pmu, pmu); 355 u32 bus_width = (cpu_pmu->reg_pmmir >> ARMV8_PMU_BUS_WIDTH_SHIFT) 356 & ARMV8_PMU_BUS_WIDTH_MASK; 357 u32 val = 0; 358 359 /* Encoded as Log2(number of bytes), plus one */ 360 if (bus_width > 2 && bus_width < 13) 361 val = 1 << (bus_width - 1); 362 363 return sysfs_emit(page, "0x%08x\n", val); 364 } 365 366 static DEVICE_ATTR_RO(bus_width); 367 368 static struct attribute *armv8_pmuv3_caps_attrs[] = { 369 &dev_attr_slots.attr, 370 &dev_attr_bus_slots.attr, 371 &dev_attr_bus_width.attr, 372 NULL, 373 }; 374 375 static const struct attribute_group armv8_pmuv3_caps_attr_group = { 376 .name = "caps", 377 .attrs = armv8_pmuv3_caps_attrs, 378 }; 379 380 /* 381 * Perf Events' indices 382 */ 383 #define ARMV8_IDX_CYCLE_COUNTER 0 384 #define ARMV8_IDX_COUNTER0 1 385 #define ARMV8_IDX_CYCLE_COUNTER_USER 32 386 387 /* 388 * We unconditionally enable ARMv8.5-PMU long event counter support 389 * (64-bit events) where supported. Indicate if this arm_pmu has long 390 * event counter support. 391 * 392 * On AArch32, long counters make no sense (you can't access the top 393 * bits), so we only enable this on AArch64. 394 */ 395 static bool armv8pmu_has_long_event(struct arm_pmu *cpu_pmu) 396 { 397 return (IS_ENABLED(CONFIG_ARM64) && is_pmuv3p5(cpu_pmu->pmuver)); 398 } 399 400 static inline bool armv8pmu_event_has_user_read(struct perf_event *event) 401 { 402 return event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT; 403 } 404 405 /* 406 * We must chain two programmable counters for 64 bit events, 407 * except when we have allocated the 64bit cycle counter (for CPU 408 * cycles event) or when user space counter access is enabled. 409 */ 410 static inline bool armv8pmu_event_is_chained(struct perf_event *event) 411 { 412 int idx = event->hw.idx; 413 struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); 414 415 return !armv8pmu_event_has_user_read(event) && 416 armv8pmu_event_is_64bit(event) && 417 !armv8pmu_has_long_event(cpu_pmu) && 418 (idx != ARMV8_IDX_CYCLE_COUNTER); 419 } 420 421 /* 422 * ARMv8 low level PMU access 423 */ 424 425 /* 426 * Perf Event to low level counters mapping 427 */ 428 #define ARMV8_IDX_TO_COUNTER(x) \ 429 (((x) - ARMV8_IDX_COUNTER0) & ARMV8_PMU_COUNTER_MASK) 430 431 static inline u64 armv8pmu_pmcr_read(void) 432 { 433 return read_pmcr(); 434 } 435 436 static inline void armv8pmu_pmcr_write(u64 val) 437 { 438 val &= ARMV8_PMU_PMCR_MASK; 439 isb(); 440 write_pmcr(val); 441 } 442 443 static inline int armv8pmu_has_overflowed(u32 pmovsr) 444 { 445 return pmovsr & ARMV8_PMU_OVERFLOWED_MASK; 446 } 447 448 static inline int armv8pmu_counter_has_overflowed(u32 pmnc, int idx) 449 { 450 return pmnc & BIT(ARMV8_IDX_TO_COUNTER(idx)); 451 } 452 453 static inline u64 armv8pmu_read_evcntr(int idx) 454 { 455 u32 counter = ARMV8_IDX_TO_COUNTER(idx); 456 457 return read_pmevcntrn(counter); 458 } 459 460 static inline u64 armv8pmu_read_hw_counter(struct perf_event *event) 461 { 462 int idx = event->hw.idx; 463 u64 val = armv8pmu_read_evcntr(idx); 464 465 if (armv8pmu_event_is_chained(event)) 466 val = (val << 32) | armv8pmu_read_evcntr(idx - 1); 467 return val; 468 } 469 470 /* 471 * The cycle counter is always a 64-bit counter. When ARMV8_PMU_PMCR_LP 472 * is set the event counters also become 64-bit counters. Unless the 473 * user has requested a long counter (attr.config1) then we want to 474 * interrupt upon 32-bit overflow - we achieve this by applying a bias. 475 */ 476 static bool armv8pmu_event_needs_bias(struct perf_event *event) 477 { 478 struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); 479 struct hw_perf_event *hwc = &event->hw; 480 int idx = hwc->idx; 481 482 if (armv8pmu_event_is_64bit(event)) 483 return false; 484 485 if (armv8pmu_has_long_event(cpu_pmu) || 486 idx == ARMV8_IDX_CYCLE_COUNTER) 487 return true; 488 489 return false; 490 } 491 492 static u64 armv8pmu_bias_long_counter(struct perf_event *event, u64 value) 493 { 494 if (armv8pmu_event_needs_bias(event)) 495 value |= GENMASK_ULL(63, 32); 496 497 return value; 498 } 499 500 static u64 armv8pmu_unbias_long_counter(struct perf_event *event, u64 value) 501 { 502 if (armv8pmu_event_needs_bias(event)) 503 value &= ~GENMASK_ULL(63, 32); 504 505 return value; 506 } 507 508 static u64 armv8pmu_read_counter(struct perf_event *event) 509 { 510 struct hw_perf_event *hwc = &event->hw; 511 int idx = hwc->idx; 512 u64 value; 513 514 if (idx == ARMV8_IDX_CYCLE_COUNTER) 515 value = read_pmccntr(); 516 else 517 value = armv8pmu_read_hw_counter(event); 518 519 return armv8pmu_unbias_long_counter(event, value); 520 } 521 522 static inline void armv8pmu_write_evcntr(int idx, u64 value) 523 { 524 u32 counter = ARMV8_IDX_TO_COUNTER(idx); 525 526 write_pmevcntrn(counter, value); 527 } 528 529 static inline void armv8pmu_write_hw_counter(struct perf_event *event, 530 u64 value) 531 { 532 int idx = event->hw.idx; 533 534 if (armv8pmu_event_is_chained(event)) { 535 armv8pmu_write_evcntr(idx, upper_32_bits(value)); 536 armv8pmu_write_evcntr(idx - 1, lower_32_bits(value)); 537 } else { 538 armv8pmu_write_evcntr(idx, value); 539 } 540 } 541 542 static void armv8pmu_write_counter(struct perf_event *event, u64 value) 543 { 544 struct hw_perf_event *hwc = &event->hw; 545 int idx = hwc->idx; 546 547 value = armv8pmu_bias_long_counter(event, value); 548 549 if (idx == ARMV8_IDX_CYCLE_COUNTER) 550 write_pmccntr(value); 551 else 552 armv8pmu_write_hw_counter(event, value); 553 } 554 555 static inline void armv8pmu_write_evtype(int idx, u32 val) 556 { 557 u32 counter = ARMV8_IDX_TO_COUNTER(idx); 558 559 val &= ARMV8_PMU_EVTYPE_MASK; 560 write_pmevtypern(counter, val); 561 } 562 563 static inline void armv8pmu_write_event_type(struct perf_event *event) 564 { 565 struct hw_perf_event *hwc = &event->hw; 566 int idx = hwc->idx; 567 568 /* 569 * For chained events, the low counter is programmed to count 570 * the event of interest and the high counter is programmed 571 * with CHAIN event code with filters set to count at all ELs. 572 */ 573 if (armv8pmu_event_is_chained(event)) { 574 u32 chain_evt = ARMV8_PMUV3_PERFCTR_CHAIN | 575 ARMV8_PMU_INCLUDE_EL2; 576 577 armv8pmu_write_evtype(idx - 1, hwc->config_base); 578 armv8pmu_write_evtype(idx, chain_evt); 579 } else { 580 if (idx == ARMV8_IDX_CYCLE_COUNTER) 581 write_pmccfiltr(hwc->config_base); 582 else 583 armv8pmu_write_evtype(idx, hwc->config_base); 584 } 585 } 586 587 static u32 armv8pmu_event_cnten_mask(struct perf_event *event) 588 { 589 int counter = ARMV8_IDX_TO_COUNTER(event->hw.idx); 590 u32 mask = BIT(counter); 591 592 if (armv8pmu_event_is_chained(event)) 593 mask |= BIT(counter - 1); 594 return mask; 595 } 596 597 static inline void armv8pmu_enable_counter(u32 mask) 598 { 599 /* 600 * Make sure event configuration register writes are visible before we 601 * enable the counter. 602 * */ 603 isb(); 604 write_pmcntenset(mask); 605 } 606 607 static inline void armv8pmu_enable_event_counter(struct perf_event *event) 608 { 609 struct perf_event_attr *attr = &event->attr; 610 u32 mask = armv8pmu_event_cnten_mask(event); 611 612 kvm_set_pmu_events(mask, attr); 613 614 /* We rely on the hypervisor switch code to enable guest counters */ 615 if (!kvm_pmu_counter_deferred(attr)) 616 armv8pmu_enable_counter(mask); 617 } 618 619 static inline void armv8pmu_disable_counter(u32 mask) 620 { 621 write_pmcntenclr(mask); 622 /* 623 * Make sure the effects of disabling the counter are visible before we 624 * start configuring the event. 625 */ 626 isb(); 627 } 628 629 static inline void armv8pmu_disable_event_counter(struct perf_event *event) 630 { 631 struct perf_event_attr *attr = &event->attr; 632 u32 mask = armv8pmu_event_cnten_mask(event); 633 634 kvm_clr_pmu_events(mask); 635 636 /* We rely on the hypervisor switch code to disable guest counters */ 637 if (!kvm_pmu_counter_deferred(attr)) 638 armv8pmu_disable_counter(mask); 639 } 640 641 static inline void armv8pmu_enable_intens(u32 mask) 642 { 643 write_pmintenset(mask); 644 } 645 646 static inline void armv8pmu_enable_event_irq(struct perf_event *event) 647 { 648 u32 counter = ARMV8_IDX_TO_COUNTER(event->hw.idx); 649 armv8pmu_enable_intens(BIT(counter)); 650 } 651 652 static inline void armv8pmu_disable_intens(u32 mask) 653 { 654 write_pmintenclr(mask); 655 isb(); 656 /* Clear the overflow flag in case an interrupt is pending. */ 657 write_pmovsclr(mask); 658 isb(); 659 } 660 661 static inline void armv8pmu_disable_event_irq(struct perf_event *event) 662 { 663 u32 counter = ARMV8_IDX_TO_COUNTER(event->hw.idx); 664 armv8pmu_disable_intens(BIT(counter)); 665 } 666 667 static inline u32 armv8pmu_getreset_flags(void) 668 { 669 u32 value; 670 671 /* Read */ 672 value = read_pmovsclr(); 673 674 /* Write to clear flags */ 675 value &= ARMV8_PMU_OVSR_MASK; 676 write_pmovsclr(value); 677 678 return value; 679 } 680 681 static void update_pmuserenr(u64 val) 682 { 683 lockdep_assert_irqs_disabled(); 684 685 /* 686 * The current PMUSERENR_EL0 value might be the value for the guest. 687 * If that's the case, have KVM keep tracking of the register value 688 * for the host EL0 so that KVM can restore it before returning to 689 * the host EL0. Otherwise, update the register now. 690 */ 691 if (kvm_set_pmuserenr(val)) 692 return; 693 694 write_pmuserenr(val); 695 } 696 697 static void armv8pmu_disable_user_access(void) 698 { 699 update_pmuserenr(0); 700 } 701 702 static void armv8pmu_enable_user_access(struct arm_pmu *cpu_pmu) 703 { 704 int i; 705 struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events); 706 707 /* Clear any unused counters to avoid leaking their contents */ 708 for_each_clear_bit(i, cpuc->used_mask, cpu_pmu->num_events) { 709 if (i == ARMV8_IDX_CYCLE_COUNTER) 710 write_pmccntr(0); 711 else 712 armv8pmu_write_evcntr(i, 0); 713 } 714 715 update_pmuserenr(ARMV8_PMU_USERENR_ER | ARMV8_PMU_USERENR_CR); 716 } 717 718 static void armv8pmu_enable_event(struct perf_event *event) 719 { 720 /* 721 * Enable counter and interrupt, and set the counter to count 722 * the event that we're interested in. 723 */ 724 armv8pmu_disable_event_counter(event); 725 armv8pmu_write_event_type(event); 726 armv8pmu_enable_event_irq(event); 727 armv8pmu_enable_event_counter(event); 728 } 729 730 static void armv8pmu_disable_event(struct perf_event *event) 731 { 732 armv8pmu_disable_event_counter(event); 733 armv8pmu_disable_event_irq(event); 734 } 735 736 static void armv8pmu_start(struct arm_pmu *cpu_pmu) 737 { 738 struct perf_event_context *ctx; 739 int nr_user = 0; 740 741 ctx = perf_cpu_task_ctx(); 742 if (ctx) 743 nr_user = ctx->nr_user; 744 745 if (sysctl_perf_user_access && nr_user) 746 armv8pmu_enable_user_access(cpu_pmu); 747 else 748 armv8pmu_disable_user_access(); 749 750 /* Enable all counters */ 751 armv8pmu_pmcr_write(armv8pmu_pmcr_read() | ARMV8_PMU_PMCR_E); 752 753 kvm_vcpu_pmu_resync_el0(); 754 } 755 756 static void armv8pmu_stop(struct arm_pmu *cpu_pmu) 757 { 758 /* Disable all counters */ 759 armv8pmu_pmcr_write(armv8pmu_pmcr_read() & ~ARMV8_PMU_PMCR_E); 760 } 761 762 static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu) 763 { 764 u32 pmovsr; 765 struct perf_sample_data data; 766 struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events); 767 struct pt_regs *regs; 768 int idx; 769 770 /* 771 * Get and reset the IRQ flags 772 */ 773 pmovsr = armv8pmu_getreset_flags(); 774 775 /* 776 * Did an overflow occur? 777 */ 778 if (!armv8pmu_has_overflowed(pmovsr)) 779 return IRQ_NONE; 780 781 /* 782 * Handle the counter(s) overflow(s) 783 */ 784 regs = get_irq_regs(); 785 786 /* 787 * Stop the PMU while processing the counter overflows 788 * to prevent skews in group events. 789 */ 790 armv8pmu_stop(cpu_pmu); 791 for (idx = 0; idx < cpu_pmu->num_events; ++idx) { 792 struct perf_event *event = cpuc->events[idx]; 793 struct hw_perf_event *hwc; 794 795 /* Ignore if we don't have an event. */ 796 if (!event) 797 continue; 798 799 /* 800 * We have a single interrupt for all counters. Check that 801 * each counter has overflowed before we process it. 802 */ 803 if (!armv8pmu_counter_has_overflowed(pmovsr, idx)) 804 continue; 805 806 hwc = &event->hw; 807 armpmu_event_update(event); 808 perf_sample_data_init(&data, 0, hwc->last_period); 809 if (!armpmu_event_set_period(event)) 810 continue; 811 812 /* 813 * Perf event overflow will queue the processing of the event as 814 * an irq_work which will be taken care of in the handling of 815 * IPI_IRQ_WORK. 816 */ 817 if (perf_event_overflow(event, &data, regs)) 818 cpu_pmu->disable(event); 819 } 820 armv8pmu_start(cpu_pmu); 821 822 return IRQ_HANDLED; 823 } 824 825 static int armv8pmu_get_single_idx(struct pmu_hw_events *cpuc, 826 struct arm_pmu *cpu_pmu) 827 { 828 int idx; 829 830 for (idx = ARMV8_IDX_COUNTER0; idx < cpu_pmu->num_events; idx++) { 831 if (!test_and_set_bit(idx, cpuc->used_mask)) 832 return idx; 833 } 834 return -EAGAIN; 835 } 836 837 static int armv8pmu_get_chain_idx(struct pmu_hw_events *cpuc, 838 struct arm_pmu *cpu_pmu) 839 { 840 int idx; 841 842 /* 843 * Chaining requires two consecutive event counters, where 844 * the lower idx must be even. 845 */ 846 for (idx = ARMV8_IDX_COUNTER0 + 1; idx < cpu_pmu->num_events; idx += 2) { 847 if (!test_and_set_bit(idx, cpuc->used_mask)) { 848 /* Check if the preceding even counter is available */ 849 if (!test_and_set_bit(idx - 1, cpuc->used_mask)) 850 return idx; 851 /* Release the Odd counter */ 852 clear_bit(idx, cpuc->used_mask); 853 } 854 } 855 return -EAGAIN; 856 } 857 858 static int armv8pmu_get_event_idx(struct pmu_hw_events *cpuc, 859 struct perf_event *event) 860 { 861 struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); 862 struct hw_perf_event *hwc = &event->hw; 863 unsigned long evtype = hwc->config_base & ARMV8_PMU_EVTYPE_EVENT; 864 865 /* Always prefer to place a cycle counter into the cycle counter. */ 866 if (evtype == ARMV8_PMUV3_PERFCTR_CPU_CYCLES) { 867 if (!test_and_set_bit(ARMV8_IDX_CYCLE_COUNTER, cpuc->used_mask)) 868 return ARMV8_IDX_CYCLE_COUNTER; 869 else if (armv8pmu_event_is_64bit(event) && 870 armv8pmu_event_want_user_access(event) && 871 !armv8pmu_has_long_event(cpu_pmu)) 872 return -EAGAIN; 873 } 874 875 /* 876 * Otherwise use events counters 877 */ 878 if (armv8pmu_event_is_chained(event)) 879 return armv8pmu_get_chain_idx(cpuc, cpu_pmu); 880 else 881 return armv8pmu_get_single_idx(cpuc, cpu_pmu); 882 } 883 884 static void armv8pmu_clear_event_idx(struct pmu_hw_events *cpuc, 885 struct perf_event *event) 886 { 887 int idx = event->hw.idx; 888 889 clear_bit(idx, cpuc->used_mask); 890 if (armv8pmu_event_is_chained(event)) 891 clear_bit(idx - 1, cpuc->used_mask); 892 } 893 894 static int armv8pmu_user_event_idx(struct perf_event *event) 895 { 896 if (!sysctl_perf_user_access || !armv8pmu_event_has_user_read(event)) 897 return 0; 898 899 /* 900 * We remap the cycle counter index to 32 to 901 * match the offset applied to the rest of 902 * the counter indices. 903 */ 904 if (event->hw.idx == ARMV8_IDX_CYCLE_COUNTER) 905 return ARMV8_IDX_CYCLE_COUNTER_USER; 906 907 return event->hw.idx; 908 } 909 910 /* 911 * Add an event filter to a given event. 912 */ 913 static int armv8pmu_set_event_filter(struct hw_perf_event *event, 914 struct perf_event_attr *attr) 915 { 916 unsigned long config_base = 0; 917 918 if (attr->exclude_idle) 919 return -EPERM; 920 921 /* 922 * If we're running in hyp mode, then we *are* the hypervisor. 923 * Therefore we ignore exclude_hv in this configuration, since 924 * there's no hypervisor to sample anyway. This is consistent 925 * with other architectures (x86 and Power). 926 */ 927 if (is_kernel_in_hyp_mode()) { 928 if (!attr->exclude_kernel && !attr->exclude_host) 929 config_base |= ARMV8_PMU_INCLUDE_EL2; 930 if (attr->exclude_guest) 931 config_base |= ARMV8_PMU_EXCLUDE_EL1; 932 if (attr->exclude_host) 933 config_base |= ARMV8_PMU_EXCLUDE_EL0; 934 } else { 935 if (!attr->exclude_hv && !attr->exclude_host) 936 config_base |= ARMV8_PMU_INCLUDE_EL2; 937 } 938 939 /* 940 * Filter out !VHE kernels and guest kernels 941 */ 942 if (attr->exclude_kernel) 943 config_base |= ARMV8_PMU_EXCLUDE_EL1; 944 945 if (attr->exclude_user) 946 config_base |= ARMV8_PMU_EXCLUDE_EL0; 947 948 /* 949 * Install the filter into config_base as this is used to 950 * construct the event type. 951 */ 952 event->config_base = config_base; 953 954 return 0; 955 } 956 957 static void armv8pmu_reset(void *info) 958 { 959 struct arm_pmu *cpu_pmu = (struct arm_pmu *)info; 960 u64 pmcr; 961 962 /* The counter and interrupt enable registers are unknown at reset. */ 963 armv8pmu_disable_counter(U32_MAX); 964 armv8pmu_disable_intens(U32_MAX); 965 966 /* Clear the counters we flip at guest entry/exit */ 967 kvm_clr_pmu_events(U32_MAX); 968 969 /* 970 * Initialize & Reset PMNC. Request overflow interrupt for 971 * 64 bit cycle counter but cheat in armv8pmu_write_counter(). 972 */ 973 pmcr = ARMV8_PMU_PMCR_P | ARMV8_PMU_PMCR_C | ARMV8_PMU_PMCR_LC; 974 975 /* Enable long event counter support where available */ 976 if (armv8pmu_has_long_event(cpu_pmu)) 977 pmcr |= ARMV8_PMU_PMCR_LP; 978 979 armv8pmu_pmcr_write(pmcr); 980 } 981 982 static int __armv8_pmuv3_map_event_id(struct arm_pmu *armpmu, 983 struct perf_event *event) 984 { 985 if (event->attr.type == PERF_TYPE_HARDWARE && 986 event->attr.config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS) { 987 988 if (test_bit(ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED, 989 armpmu->pmceid_bitmap)) 990 return ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED; 991 992 if (test_bit(ARMV8_PMUV3_PERFCTR_BR_RETIRED, 993 armpmu->pmceid_bitmap)) 994 return ARMV8_PMUV3_PERFCTR_BR_RETIRED; 995 996 return HW_OP_UNSUPPORTED; 997 } 998 999 return armpmu_map_event(event, &armv8_pmuv3_perf_map, 1000 &armv8_pmuv3_perf_cache_map, 1001 ARMV8_PMU_EVTYPE_EVENT); 1002 } 1003 1004 static int __armv8_pmuv3_map_event(struct perf_event *event, 1005 const unsigned (*extra_event_map) 1006 [PERF_COUNT_HW_MAX], 1007 const unsigned (*extra_cache_map) 1008 [PERF_COUNT_HW_CACHE_MAX] 1009 [PERF_COUNT_HW_CACHE_OP_MAX] 1010 [PERF_COUNT_HW_CACHE_RESULT_MAX]) 1011 { 1012 int hw_event_id; 1013 struct arm_pmu *armpmu = to_arm_pmu(event->pmu); 1014 1015 hw_event_id = __armv8_pmuv3_map_event_id(armpmu, event); 1016 1017 /* 1018 * CHAIN events only work when paired with an adjacent counter, and it 1019 * never makes sense for a user to open one in isolation, as they'll be 1020 * rotated arbitrarily. 1021 */ 1022 if (hw_event_id == ARMV8_PMUV3_PERFCTR_CHAIN) 1023 return -EINVAL; 1024 1025 if (armv8pmu_event_is_64bit(event)) 1026 event->hw.flags |= ARMPMU_EVT_64BIT; 1027 1028 /* 1029 * User events must be allocated into a single counter, and so 1030 * must not be chained. 1031 * 1032 * Most 64-bit events require long counter support, but 64-bit 1033 * CPU_CYCLES events can be placed into the dedicated cycle 1034 * counter when this is free. 1035 */ 1036 if (armv8pmu_event_want_user_access(event)) { 1037 if (!(event->attach_state & PERF_ATTACH_TASK)) 1038 return -EINVAL; 1039 if (armv8pmu_event_is_64bit(event) && 1040 (hw_event_id != ARMV8_PMUV3_PERFCTR_CPU_CYCLES) && 1041 !armv8pmu_has_long_event(armpmu)) 1042 return -EOPNOTSUPP; 1043 1044 event->hw.flags |= PERF_EVENT_FLAG_USER_READ_CNT; 1045 } 1046 1047 /* Only expose micro/arch events supported by this PMU */ 1048 if ((hw_event_id > 0) && (hw_event_id < ARMV8_PMUV3_MAX_COMMON_EVENTS) 1049 && test_bit(hw_event_id, armpmu->pmceid_bitmap)) { 1050 return hw_event_id; 1051 } 1052 1053 return armpmu_map_event(event, extra_event_map, extra_cache_map, 1054 ARMV8_PMU_EVTYPE_EVENT); 1055 } 1056 1057 static int armv8_pmuv3_map_event(struct perf_event *event) 1058 { 1059 return __armv8_pmuv3_map_event(event, NULL, NULL); 1060 } 1061 1062 static int armv8_a53_map_event(struct perf_event *event) 1063 { 1064 return __armv8_pmuv3_map_event(event, NULL, &armv8_a53_perf_cache_map); 1065 } 1066 1067 static int armv8_a57_map_event(struct perf_event *event) 1068 { 1069 return __armv8_pmuv3_map_event(event, NULL, &armv8_a57_perf_cache_map); 1070 } 1071 1072 static int armv8_a73_map_event(struct perf_event *event) 1073 { 1074 return __armv8_pmuv3_map_event(event, NULL, &armv8_a73_perf_cache_map); 1075 } 1076 1077 static int armv8_thunder_map_event(struct perf_event *event) 1078 { 1079 return __armv8_pmuv3_map_event(event, NULL, 1080 &armv8_thunder_perf_cache_map); 1081 } 1082 1083 static int armv8_vulcan_map_event(struct perf_event *event) 1084 { 1085 return __armv8_pmuv3_map_event(event, NULL, 1086 &armv8_vulcan_perf_cache_map); 1087 } 1088 1089 struct armv8pmu_probe_info { 1090 struct arm_pmu *pmu; 1091 bool present; 1092 }; 1093 1094 static void __armv8pmu_probe_pmu(void *info) 1095 { 1096 struct armv8pmu_probe_info *probe = info; 1097 struct arm_pmu *cpu_pmu = probe->pmu; 1098 u64 pmceid_raw[2]; 1099 u32 pmceid[2]; 1100 int pmuver; 1101 1102 pmuver = read_pmuver(); 1103 if (!pmuv3_implemented(pmuver)) 1104 return; 1105 1106 cpu_pmu->pmuver = pmuver; 1107 probe->present = true; 1108 1109 /* Read the nb of CNTx counters supported from PMNC */ 1110 cpu_pmu->num_events = (armv8pmu_pmcr_read() >> ARMV8_PMU_PMCR_N_SHIFT) 1111 & ARMV8_PMU_PMCR_N_MASK; 1112 1113 /* Add the CPU cycles counter */ 1114 cpu_pmu->num_events += 1; 1115 1116 pmceid[0] = pmceid_raw[0] = read_pmceid0(); 1117 pmceid[1] = pmceid_raw[1] = read_pmceid1(); 1118 1119 bitmap_from_arr32(cpu_pmu->pmceid_bitmap, 1120 pmceid, ARMV8_PMUV3_MAX_COMMON_EVENTS); 1121 1122 pmceid[0] = pmceid_raw[0] >> 32; 1123 pmceid[1] = pmceid_raw[1] >> 32; 1124 1125 bitmap_from_arr32(cpu_pmu->pmceid_ext_bitmap, 1126 pmceid, ARMV8_PMUV3_MAX_COMMON_EVENTS); 1127 1128 /* store PMMIR register for sysfs */ 1129 if (is_pmuv3p4(pmuver) && (pmceid_raw[1] & BIT(31))) 1130 cpu_pmu->reg_pmmir = read_pmmir(); 1131 else 1132 cpu_pmu->reg_pmmir = 0; 1133 } 1134 1135 static int armv8pmu_probe_pmu(struct arm_pmu *cpu_pmu) 1136 { 1137 struct armv8pmu_probe_info probe = { 1138 .pmu = cpu_pmu, 1139 .present = false, 1140 }; 1141 int ret; 1142 1143 ret = smp_call_function_any(&cpu_pmu->supported_cpus, 1144 __armv8pmu_probe_pmu, 1145 &probe, 1); 1146 if (ret) 1147 return ret; 1148 1149 return probe.present ? 0 : -ENODEV; 1150 } 1151 1152 static void armv8pmu_disable_user_access_ipi(void *unused) 1153 { 1154 armv8pmu_disable_user_access(); 1155 } 1156 1157 static int armv8pmu_proc_user_access_handler(struct ctl_table *table, int write, 1158 void *buffer, size_t *lenp, loff_t *ppos) 1159 { 1160 int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); 1161 if (ret || !write || sysctl_perf_user_access) 1162 return ret; 1163 1164 on_each_cpu(armv8pmu_disable_user_access_ipi, NULL, 1); 1165 return 0; 1166 } 1167 1168 static struct ctl_table armv8_pmu_sysctl_table[] = { 1169 { 1170 .procname = "perf_user_access", 1171 .data = &sysctl_perf_user_access, 1172 .maxlen = sizeof(unsigned int), 1173 .mode = 0644, 1174 .proc_handler = armv8pmu_proc_user_access_handler, 1175 .extra1 = SYSCTL_ZERO, 1176 .extra2 = SYSCTL_ONE, 1177 }, 1178 { } 1179 }; 1180 1181 static void armv8_pmu_register_sysctl_table(void) 1182 { 1183 static u32 tbl_registered = 0; 1184 1185 if (!cmpxchg_relaxed(&tbl_registered, 0, 1)) 1186 register_sysctl("kernel", armv8_pmu_sysctl_table); 1187 } 1188 1189 static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name, 1190 int (*map_event)(struct perf_event *event), 1191 const struct attribute_group *events, 1192 const struct attribute_group *format, 1193 const struct attribute_group *caps) 1194 { 1195 int ret = armv8pmu_probe_pmu(cpu_pmu); 1196 if (ret) 1197 return ret; 1198 1199 cpu_pmu->handle_irq = armv8pmu_handle_irq; 1200 cpu_pmu->enable = armv8pmu_enable_event; 1201 cpu_pmu->disable = armv8pmu_disable_event; 1202 cpu_pmu->read_counter = armv8pmu_read_counter; 1203 cpu_pmu->write_counter = armv8pmu_write_counter; 1204 cpu_pmu->get_event_idx = armv8pmu_get_event_idx; 1205 cpu_pmu->clear_event_idx = armv8pmu_clear_event_idx; 1206 cpu_pmu->start = armv8pmu_start; 1207 cpu_pmu->stop = armv8pmu_stop; 1208 cpu_pmu->reset = armv8pmu_reset; 1209 cpu_pmu->set_event_filter = armv8pmu_set_event_filter; 1210 1211 cpu_pmu->pmu.event_idx = armv8pmu_user_event_idx; 1212 1213 cpu_pmu->name = name; 1214 cpu_pmu->map_event = map_event; 1215 cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] = events ? 1216 events : &armv8_pmuv3_events_attr_group; 1217 cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] = format ? 1218 format : &armv8_pmuv3_format_attr_group; 1219 cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_CAPS] = caps ? 1220 caps : &armv8_pmuv3_caps_attr_group; 1221 1222 armv8_pmu_register_sysctl_table(); 1223 return 0; 1224 } 1225 1226 static int armv8_pmu_init_nogroups(struct arm_pmu *cpu_pmu, char *name, 1227 int (*map_event)(struct perf_event *event)) 1228 { 1229 return armv8_pmu_init(cpu_pmu, name, map_event, NULL, NULL, NULL); 1230 } 1231 1232 #define PMUV3_INIT_SIMPLE(name) \ 1233 static int name##_pmu_init(struct arm_pmu *cpu_pmu) \ 1234 { \ 1235 return armv8_pmu_init_nogroups(cpu_pmu, #name, armv8_pmuv3_map_event);\ 1236 } 1237 1238 PMUV3_INIT_SIMPLE(armv8_pmuv3) 1239 1240 PMUV3_INIT_SIMPLE(armv8_cortex_a34) 1241 PMUV3_INIT_SIMPLE(armv8_cortex_a55) 1242 PMUV3_INIT_SIMPLE(armv8_cortex_a65) 1243 PMUV3_INIT_SIMPLE(armv8_cortex_a75) 1244 PMUV3_INIT_SIMPLE(armv8_cortex_a76) 1245 PMUV3_INIT_SIMPLE(armv8_cortex_a77) 1246 PMUV3_INIT_SIMPLE(armv8_cortex_a78) 1247 PMUV3_INIT_SIMPLE(armv9_cortex_a510) 1248 PMUV3_INIT_SIMPLE(armv9_cortex_a520) 1249 PMUV3_INIT_SIMPLE(armv9_cortex_a710) 1250 PMUV3_INIT_SIMPLE(armv9_cortex_a715) 1251 PMUV3_INIT_SIMPLE(armv9_cortex_a720) 1252 PMUV3_INIT_SIMPLE(armv8_cortex_x1) 1253 PMUV3_INIT_SIMPLE(armv9_cortex_x2) 1254 PMUV3_INIT_SIMPLE(armv9_cortex_x3) 1255 PMUV3_INIT_SIMPLE(armv9_cortex_x4) 1256 PMUV3_INIT_SIMPLE(armv8_neoverse_e1) 1257 PMUV3_INIT_SIMPLE(armv8_neoverse_n1) 1258 PMUV3_INIT_SIMPLE(armv9_neoverse_n2) 1259 PMUV3_INIT_SIMPLE(armv8_neoverse_v1) 1260 1261 PMUV3_INIT_SIMPLE(armv8_nvidia_carmel) 1262 PMUV3_INIT_SIMPLE(armv8_nvidia_denver) 1263 1264 static int armv8_a35_pmu_init(struct arm_pmu *cpu_pmu) 1265 { 1266 return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a35", 1267 armv8_a53_map_event); 1268 } 1269 1270 static int armv8_a53_pmu_init(struct arm_pmu *cpu_pmu) 1271 { 1272 return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a53", 1273 armv8_a53_map_event); 1274 } 1275 1276 static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu) 1277 { 1278 return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a57", 1279 armv8_a57_map_event); 1280 } 1281 1282 static int armv8_a72_pmu_init(struct arm_pmu *cpu_pmu) 1283 { 1284 return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a72", 1285 armv8_a57_map_event); 1286 } 1287 1288 static int armv8_a73_pmu_init(struct arm_pmu *cpu_pmu) 1289 { 1290 return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a73", 1291 armv8_a73_map_event); 1292 } 1293 1294 static int armv8_thunder_pmu_init(struct arm_pmu *cpu_pmu) 1295 { 1296 return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cavium_thunder", 1297 armv8_thunder_map_event); 1298 } 1299 1300 static int armv8_vulcan_pmu_init(struct arm_pmu *cpu_pmu) 1301 { 1302 return armv8_pmu_init_nogroups(cpu_pmu, "armv8_brcm_vulcan", 1303 armv8_vulcan_map_event); 1304 } 1305 1306 static const struct of_device_id armv8_pmu_of_device_ids[] = { 1307 {.compatible = "arm,armv8-pmuv3", .data = armv8_pmuv3_pmu_init}, 1308 {.compatible = "arm,cortex-a34-pmu", .data = armv8_cortex_a34_pmu_init}, 1309 {.compatible = "arm,cortex-a35-pmu", .data = armv8_a35_pmu_init}, 1310 {.compatible = "arm,cortex-a53-pmu", .data = armv8_a53_pmu_init}, 1311 {.compatible = "arm,cortex-a55-pmu", .data = armv8_cortex_a55_pmu_init}, 1312 {.compatible = "arm,cortex-a57-pmu", .data = armv8_a57_pmu_init}, 1313 {.compatible = "arm,cortex-a65-pmu", .data = armv8_cortex_a65_pmu_init}, 1314 {.compatible = "arm,cortex-a72-pmu", .data = armv8_a72_pmu_init}, 1315 {.compatible = "arm,cortex-a73-pmu", .data = armv8_a73_pmu_init}, 1316 {.compatible = "arm,cortex-a75-pmu", .data = armv8_cortex_a75_pmu_init}, 1317 {.compatible = "arm,cortex-a76-pmu", .data = armv8_cortex_a76_pmu_init}, 1318 {.compatible = "arm,cortex-a77-pmu", .data = armv8_cortex_a77_pmu_init}, 1319 {.compatible = "arm,cortex-a78-pmu", .data = armv8_cortex_a78_pmu_init}, 1320 {.compatible = "arm,cortex-a510-pmu", .data = armv9_cortex_a510_pmu_init}, 1321 {.compatible = "arm,cortex-a520-pmu", .data = armv9_cortex_a520_pmu_init}, 1322 {.compatible = "arm,cortex-a710-pmu", .data = armv9_cortex_a710_pmu_init}, 1323 {.compatible = "arm,cortex-a715-pmu", .data = armv9_cortex_a715_pmu_init}, 1324 {.compatible = "arm,cortex-a720-pmu", .data = armv9_cortex_a720_pmu_init}, 1325 {.compatible = "arm,cortex-x1-pmu", .data = armv8_cortex_x1_pmu_init}, 1326 {.compatible = "arm,cortex-x2-pmu", .data = armv9_cortex_x2_pmu_init}, 1327 {.compatible = "arm,cortex-x3-pmu", .data = armv9_cortex_x3_pmu_init}, 1328 {.compatible = "arm,cortex-x4-pmu", .data = armv9_cortex_x4_pmu_init}, 1329 {.compatible = "arm,neoverse-e1-pmu", .data = armv8_neoverse_e1_pmu_init}, 1330 {.compatible = "arm,neoverse-n1-pmu", .data = armv8_neoverse_n1_pmu_init}, 1331 {.compatible = "arm,neoverse-n2-pmu", .data = armv9_neoverse_n2_pmu_init}, 1332 {.compatible = "arm,neoverse-v1-pmu", .data = armv8_neoverse_v1_pmu_init}, 1333 {.compatible = "cavium,thunder-pmu", .data = armv8_thunder_pmu_init}, 1334 {.compatible = "brcm,vulcan-pmu", .data = armv8_vulcan_pmu_init}, 1335 {.compatible = "nvidia,carmel-pmu", .data = armv8_nvidia_carmel_pmu_init}, 1336 {.compatible = "nvidia,denver-pmu", .data = armv8_nvidia_denver_pmu_init}, 1337 {}, 1338 }; 1339 1340 static int armv8_pmu_device_probe(struct platform_device *pdev) 1341 { 1342 return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids, NULL); 1343 } 1344 1345 static struct platform_driver armv8_pmu_driver = { 1346 .driver = { 1347 .name = ARMV8_PMU_PDEV_NAME, 1348 .of_match_table = armv8_pmu_of_device_ids, 1349 .suppress_bind_attrs = true, 1350 }, 1351 .probe = armv8_pmu_device_probe, 1352 }; 1353 1354 static int __init armv8_pmu_driver_init(void) 1355 { 1356 int ret; 1357 1358 if (acpi_disabled) 1359 ret = platform_driver_register(&armv8_pmu_driver); 1360 else 1361 ret = arm_pmu_acpi_probe(armv8_pmuv3_pmu_init); 1362 1363 if (!ret) 1364 lockup_detector_retry_init(); 1365 1366 return ret; 1367 } 1368 device_initcall(armv8_pmu_driver_init) 1369 1370 void arch_perf_update_userpage(struct perf_event *event, 1371 struct perf_event_mmap_page *userpg, u64 now) 1372 { 1373 struct clock_read_data *rd; 1374 unsigned int seq; 1375 u64 ns; 1376 1377 userpg->cap_user_time = 0; 1378 userpg->cap_user_time_zero = 0; 1379 userpg->cap_user_time_short = 0; 1380 userpg->cap_user_rdpmc = armv8pmu_event_has_user_read(event); 1381 1382 if (userpg->cap_user_rdpmc) { 1383 if (event->hw.flags & ARMPMU_EVT_64BIT) 1384 userpg->pmc_width = 64; 1385 else 1386 userpg->pmc_width = 32; 1387 } 1388 1389 do { 1390 rd = sched_clock_read_begin(&seq); 1391 1392 if (rd->read_sched_clock != arch_timer_read_counter) 1393 return; 1394 1395 userpg->time_mult = rd->mult; 1396 userpg->time_shift = rd->shift; 1397 userpg->time_zero = rd->epoch_ns; 1398 userpg->time_cycles = rd->epoch_cyc; 1399 userpg->time_mask = rd->sched_clock_mask; 1400 1401 /* 1402 * Subtract the cycle base, such that software that 1403 * doesn't know about cap_user_time_short still 'works' 1404 * assuming no wraps. 1405 */ 1406 ns = mul_u64_u32_shr(rd->epoch_cyc, rd->mult, rd->shift); 1407 userpg->time_zero -= ns; 1408 1409 } while (sched_clock_read_retry(seq)); 1410 1411 userpg->time_offset = userpg->time_zero - now; 1412 1413 /* 1414 * time_shift is not expected to be greater than 31 due to 1415 * the original published conversion algorithm shifting a 1416 * 32-bit value (now specifies a 64-bit value) - refer 1417 * perf_event_mmap_page documentation in perf_event.h. 1418 */ 1419 if (userpg->time_shift == 32) { 1420 userpg->time_shift = 31; 1421 userpg->time_mult >>= 1; 1422 } 1423 1424 /* 1425 * Internal timekeeping for enabled/running/stopped times 1426 * is always computed with the sched_clock. 1427 */ 1428 userpg->cap_user_time = 1; 1429 userpg->cap_user_time_zero = 1; 1430 userpg->cap_user_time_short = 1; 1431 } 1432