arch/arm/kernel/perf_event

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
armv7_pmnc_read
armv7_pmnc_write
armv7_pmnc_has_overflowed
armv7_pmnc_counter_valid
armv7_pmnc_counter_has_overflowed
armv7_pmnc_select_counter
armv7pmu_read_counter
armv7pmu_write_counter
armv7_pmnc_write_evtsel
armv7_pmnc_enable_counter
armv7_pmnc_disable_counter
armv7_pmnc_enable_intens
armv7_pmnc_disable_intens
armv7_pmnc_getreset_flags
armv7_pmnc_dump_regs
armv7pmu_enable_event
armv7pmu_disable_event
armv7pmu_handle_irq
armv7pmu_start
armv7pmu_stop
armv7pmu_get_event_idx
armv7pmu_clear_event_idx
armv7pmu_set_event_filter
armv7pmu_reset
armv7_a8_map_event
armv7_a9_map_event
armv7_a5_map_event
armv7_a15_map_event
armv7_a7_map_event
armv7_a12_map_event
krait_map_event
krait_map_event_no_branch
scorpion_map_event
armv7pmu_init
armv7_read_num_pmnc_events
armv7_probe_num_events
armv7_a8_pmu_init
armv7_a9_pmu_init
armv7_a5_pmu_init
armv7_a15_pmu_init
armv7_a7_pmu_init
armv7_a12_pmu_init
armv7_a17_pmu_init
krait_read_pmresrn
krait_write_pmresrn
venum_read_pmresr
venum_write_pmresr
venum_pre_pmresr
venum_post_pmresr
krait_get_pmresrn_event
krait_evt_setup
clear_pmresrn_group
krait_clearpmu
krait_pmu_disable_event
krait_pmu_enable_event
krait_pmu_reset
krait_event_to_bit
krait_pmu_get_event_idx
krait_pmu_clear_event_idx
krait_pmu_init
scorpion_read_pmresrn
scorpion_write_pmresrn
scorpion_get_pmresrn_event
scorpion_evt_setup
scorpion_clearpmu
scorpion_pmu_disable_event
scorpion_pmu_enable_event
scorpion_pmu_reset
scorpion_event_to_bit
scorpion_pmu_get_event_idx
scorpion_pmu_clear_event_idx
scorpion_pmu_init
scorpion_mp_pmu_init
armv7_pmu_device_probe
   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code.
   4  *
   5  * ARMv7 support: Jean Pihet <jpihet@mvista.com>
   6  * 2010 (c) MontaVista Software, LLC.
   7  *
   8  * Copied from ARMv6 code, with the low level code inspired
   9  *  by the ARMv7 Oprofile code.
  10  *
  11  * Cortex-A8 has up to 4 configurable performance counters and
  12  *  a single cycle counter.
  13  * Cortex-A9 has up to 31 configurable performance counters and
  14  *  a single cycle counter.
  15  *
  16  * All counters can be enabled/disabled and IRQ masked separately. The cycle
  17  *  counter and all 4 performance counters together can be reset separately.
  18  */
  19 
  20 #ifdef CONFIG_CPU_V7
  21 
  22 #include <asm/cp15.h>
  23 #include <asm/cputype.h>
  24 #include <asm/irq_regs.h>
  25 #include <asm/vfp.h>
  26 #include "../vfp/vfpinstr.h"
  27 
  28 #include <linux/of.h>
  29 #include <linux/perf/arm_pmu.h>
  30 #include <linux/platform_device.h>
  31 
  32 /*
  33  * Common ARMv7 event types
  34  *
  35  * Note: An implementation may not be able to count all of these events
  36  * but the encodings are considered to be `reserved' in the case that
  37  * they are not available.
  38  */
  39 #define ARMV7_PERFCTR_PMNC_SW_INCR                      0x00
  40 #define ARMV7_PERFCTR_L1_ICACHE_REFILL                  0x01
  41 #define ARMV7_PERFCTR_ITLB_REFILL                       0x02
  42 #define ARMV7_PERFCTR_L1_DCACHE_REFILL                  0x03
  43 #define ARMV7_PERFCTR_L1_DCACHE_ACCESS                  0x04
  44 #define ARMV7_PERFCTR_DTLB_REFILL                       0x05
  45 #define ARMV7_PERFCTR_MEM_READ                          0x06
  46 #define ARMV7_PERFCTR_MEM_WRITE                         0x07
  47 #define ARMV7_PERFCTR_INSTR_EXECUTED                    0x08
  48 #define ARMV7_PERFCTR_EXC_TAKEN                         0x09
  49 #define ARMV7_PERFCTR_EXC_EXECUTED                      0x0A
  50 #define ARMV7_PERFCTR_CID_WRITE                         0x0B
  51 
  52 /*
  53  * ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS.
  54  * It counts:
  55  *  - all (taken) branch instructions,
  56  *  - instructions that explicitly write the PC,
  57  *  - exception generating instructions.
  58  */
  59 #define ARMV7_PERFCTR_PC_WRITE                          0x0C
  60 #define ARMV7_PERFCTR_PC_IMM_BRANCH                     0x0D
  61 #define ARMV7_PERFCTR_PC_PROC_RETURN                    0x0E
  62 #define ARMV7_PERFCTR_MEM_UNALIGNED_ACCESS              0x0F
  63 #define ARMV7_PERFCTR_PC_BRANCH_MIS_PRED                0x10
  64 #define ARMV7_PERFCTR_CLOCK_CYCLES                      0x11
  65 #define ARMV7_PERFCTR_PC_BRANCH_PRED                    0x12
  66 
  67 /* These events are defined by the PMUv2 supplement (ARM DDI 0457A). */
  68 #define ARMV7_PERFCTR_MEM_ACCESS                        0x13
  69 #define ARMV7_PERFCTR_L1_ICACHE_ACCESS                  0x14
  70 #define ARMV7_PERFCTR_L1_DCACHE_WB                      0x15
  71 #define ARMV7_PERFCTR_L2_CACHE_ACCESS                   0x16
  72 #define ARMV7_PERFCTR_L2_CACHE_REFILL                   0x17
  73 #define ARMV7_PERFCTR_L2_CACHE_WB                       0x18
  74 #define ARMV7_PERFCTR_BUS_ACCESS                        0x19
  75 #define ARMV7_PERFCTR_MEM_ERROR                         0x1A
  76 #define ARMV7_PERFCTR_INSTR_SPEC                        0x1B
  77 #define ARMV7_PERFCTR_TTBR_WRITE                        0x1C
  78 #define ARMV7_PERFCTR_BUS_CYCLES                        0x1D
  79 
  80 #define ARMV7_PERFCTR_CPU_CYCLES                        0xFF
  81 
  82 /* ARMv7 Cortex-A8 specific event types */
  83 #define ARMV7_A8_PERFCTR_L2_CACHE_ACCESS                0x43
  84 #define ARMV7_A8_PERFCTR_L2_CACHE_REFILL                0x44
  85 #define ARMV7_A8_PERFCTR_L1_ICACHE_ACCESS               0x50
  86 #define ARMV7_A8_PERFCTR_STALL_ISIDE                    0x56
  87 
  88 /* ARMv7 Cortex-A9 specific event types */
  89 #define ARMV7_A9_PERFCTR_INSTR_CORE_RENAME              0x68
  90 #define ARMV7_A9_PERFCTR_STALL_ICACHE                   0x60
  91 #define ARMV7_A9_PERFCTR_STALL_DISPATCH                 0x66
  92 
  93 /* ARMv7 Cortex-A5 specific event types */
  94 #define ARMV7_A5_PERFCTR_PREFETCH_LINEFILL              0xc2
  95 #define ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP         0xc3
  96 
  97 /* ARMv7 Cortex-A15 specific event types */
  98 #define ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_READ         0x40
  99 #define ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_WRITE        0x41
 100 #define ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_READ         0x42
 101 #define ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_WRITE        0x43
 102 
 103 #define ARMV7_A15_PERFCTR_DTLB_REFILL_L1_READ           0x4C
 104 #define ARMV7_A15_PERFCTR_DTLB_REFILL_L1_WRITE          0x4D
 105 
 106 #define ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_READ          0x50
 107 #define ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_WRITE         0x51
 108 #define ARMV7_A15_PERFCTR_L2_CACHE_REFILL_READ          0x52
 109 #define ARMV7_A15_PERFCTR_L2_CACHE_REFILL_WRITE         0x53
 110 
 111 #define ARMV7_A15_PERFCTR_PC_WRITE_SPEC                 0x76
 112 
 113 /* ARMv7 Cortex-A12 specific event types */
 114 #define ARMV7_A12_PERFCTR_L1_DCACHE_ACCESS_READ         0x40
 115 #define ARMV7_A12_PERFCTR_L1_DCACHE_ACCESS_WRITE        0x41
 116 
 117 #define ARMV7_A12_PERFCTR_L2_CACHE_ACCESS_READ          0x50
 118 #define ARMV7_A12_PERFCTR_L2_CACHE_ACCESS_WRITE         0x51
 119 
 120 #define ARMV7_A12_PERFCTR_PC_WRITE_SPEC                 0x76
 121 
 122 #define ARMV7_A12_PERFCTR_PF_TLB_REFILL                 0xe7
 123 
 124 /* ARMv7 Krait specific event types */
 125 #define KRAIT_PMRESR0_GROUP0                            0xcc
 126 #define KRAIT_PMRESR1_GROUP0                            0xd0
 127 #define KRAIT_PMRESR2_GROUP0                            0xd4
 128 #define KRAIT_VPMRESR0_GROUP0                           0xd8
 129 
 130 #define KRAIT_PERFCTR_L1_ICACHE_ACCESS                  0x10011
 131 #define KRAIT_PERFCTR_L1_ICACHE_MISS                    0x10010
 132 
 133 #define KRAIT_PERFCTR_L1_ITLB_ACCESS                    0x12222
 134 #define KRAIT_PERFCTR_L1_DTLB_ACCESS                    0x12210
 135 
 136 /* ARMv7 Scorpion specific event types */
 137 #define SCORPION_LPM0_GROUP0                            0x4c
 138 #define SCORPION_LPM1_GROUP0                            0x50
 139 #define SCORPION_LPM2_GROUP0                            0x54
 140 #define SCORPION_L2LPM_GROUP0                           0x58
 141 #define SCORPION_VLPM_GROUP0                            0x5c
 142 
 143 #define SCORPION_ICACHE_ACCESS                          0x10053
 144 #define SCORPION_ICACHE_MISS                            0x10052
 145 
 146 #define SCORPION_DTLB_ACCESS                            0x12013
 147 #define SCORPION_DTLB_MISS                              0x12012
 148 
 149 #define SCORPION_ITLB_MISS                              0x12021
 150 
 151 /*
 152  * Cortex-A8 HW events mapping
 153  *
 154  * The hardware events that we support. We do support cache operations but
 155  * we have harvard caches and no way to combine instruction and data
 156  * accesses/misses in hardware.
 157  */
 158 static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = {
 159         PERF_MAP_ALL_UNSUPPORTED,
 160         [PERF_COUNT_HW_CPU_CYCLES]              = ARMV7_PERFCTR_CPU_CYCLES,
 161         [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV7_PERFCTR_INSTR_EXECUTED,
 162         [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 163         [PERF_COUNT_HW_CACHE_MISSES]            = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 164         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV7_PERFCTR_PC_WRITE,
 165         [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 166         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV7_A8_PERFCTR_STALL_ISIDE,
 167 };
 168 
 169 static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 170                                           [PERF_COUNT_HW_CACHE_OP_MAX]
 171                                           [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
 172         PERF_CACHE_MAP_ALL_UNSUPPORTED,
 173 
 174         /*
 175          * The performance counters don't differentiate between read and write
 176          * accesses/misses so this isn't strictly correct, but it's the best we
 177          * can do. Writes and reads get combined.
 178          */
 179         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 180         [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 181         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 182         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 183 
 184         [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_A8_PERFCTR_L1_ICACHE_ACCESS,
 185         [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_ICACHE_REFILL,
 186 
 187         [C(LL)][C(OP_READ)][C(RESULT_ACCESS)]   = ARMV7_A8_PERFCTR_L2_CACHE_ACCESS,
 188         [C(LL)][C(OP_READ)][C(RESULT_MISS)]     = ARMV7_A8_PERFCTR_L2_CACHE_REFILL,
 189         [C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)]  = ARMV7_A8_PERFCTR_L2_CACHE_ACCESS,
 190         [C(LL)][C(OP_WRITE)][C(RESULT_MISS)]    = ARMV7_A8_PERFCTR_L2_CACHE_REFILL,
 191 
 192         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_DTLB_REFILL,
 193         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_DTLB_REFILL,
 194 
 195         [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_ITLB_REFILL,
 196         [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_ITLB_REFILL,
 197 
 198         [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_PC_BRANCH_PRED,
 199         [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 200         [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 201         [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 202 };
 203 
 204 /*
 205  * Cortex-A9 HW events mapping
 206  */
 207 static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = {
 208         PERF_MAP_ALL_UNSUPPORTED,
 209         [PERF_COUNT_HW_CPU_CYCLES]              = ARMV7_PERFCTR_CPU_CYCLES,
 210         [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV7_A9_PERFCTR_INSTR_CORE_RENAME,
 211         [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 212         [PERF_COUNT_HW_CACHE_MISSES]            = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 213         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV7_PERFCTR_PC_WRITE,
 214         [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 215         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV7_A9_PERFCTR_STALL_ICACHE,
 216         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND]  = ARMV7_A9_PERFCTR_STALL_DISPATCH,
 217 };
 218 
 219 static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 220                                           [PERF_COUNT_HW_CACHE_OP_MAX]
 221                                           [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
 222         PERF_CACHE_MAP_ALL_UNSUPPORTED,
 223 
 224         /*
 225          * The performance counters don't differentiate between read and write
 226          * accesses/misses so this isn't strictly correct, but it's the best we
 227          * can do. Writes and reads get combined.
 228          */
 229         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 230         [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 231         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 232         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 233 
 234         [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_ICACHE_REFILL,
 235 
 236         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_DTLB_REFILL,
 237         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_DTLB_REFILL,
 238 
 239         [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_ITLB_REFILL,
 240         [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_ITLB_REFILL,
 241 
 242         [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_PC_BRANCH_PRED,
 243         [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 244         [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 245         [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 246 };
 247 
 248 /*
 249  * Cortex-A5 HW events mapping
 250  */
 251 static const unsigned armv7_a5_perf_map[PERF_COUNT_HW_MAX] = {
 252         PERF_MAP_ALL_UNSUPPORTED,
 253         [PERF_COUNT_HW_CPU_CYCLES]              = ARMV7_PERFCTR_CPU_CYCLES,
 254         [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV7_PERFCTR_INSTR_EXECUTED,
 255         [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 256         [PERF_COUNT_HW_CACHE_MISSES]            = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 257         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV7_PERFCTR_PC_WRITE,
 258         [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 259 };
 260 
 261 static const unsigned armv7_a5_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 262                                         [PERF_COUNT_HW_CACHE_OP_MAX]
 263                                         [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
 264         PERF_CACHE_MAP_ALL_UNSUPPORTED,
 265 
 266         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 267         [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 268         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 269         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 270         [C(L1D)][C(OP_PREFETCH)][C(RESULT_ACCESS)]      = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL,
 271         [C(L1D)][C(OP_PREFETCH)][C(RESULT_MISS)]        = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP,
 272 
 273         [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
 274         [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_ICACHE_REFILL,
 275         /*
 276          * The prefetch counters don't differentiate between the I side and the
 277          * D side.
 278          */
 279         [C(L1I)][C(OP_PREFETCH)][C(RESULT_ACCESS)]      = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL,
 280         [C(L1I)][C(OP_PREFETCH)][C(RESULT_MISS)]        = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP,
 281 
 282         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_DTLB_REFILL,
 283         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_DTLB_REFILL,
 284 
 285         [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_ITLB_REFILL,
 286         [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_ITLB_REFILL,
 287 
 288         [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_PC_BRANCH_PRED,
 289         [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 290         [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 291         [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 292 };
 293 
 294 /*
 295  * Cortex-A15 HW events mapping
 296  */
 297 static const unsigned armv7_a15_perf_map[PERF_COUNT_HW_MAX] = {
 298         PERF_MAP_ALL_UNSUPPORTED,
 299         [PERF_COUNT_HW_CPU_CYCLES]              = ARMV7_PERFCTR_CPU_CYCLES,
 300         [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV7_PERFCTR_INSTR_EXECUTED,
 301         [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 302         [PERF_COUNT_HW_CACHE_MISSES]            = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 303         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV7_A15_PERFCTR_PC_WRITE_SPEC,
 304         [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 305         [PERF_COUNT_HW_BUS_CYCLES]              = ARMV7_PERFCTR_BUS_CYCLES,
 306 };
 307 
 308 static const unsigned armv7_a15_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 309                                         [PERF_COUNT_HW_CACHE_OP_MAX]
 310                                         [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
 311         PERF_CACHE_MAP_ALL_UNSUPPORTED,
 312 
 313         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_READ,
 314         [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_READ,
 315         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_WRITE,
 316         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_WRITE,
 317 
 318         /*
 319          * Not all performance counters differentiate between read and write
 320          * accesses/misses so we're not always strictly correct, but it's the
 321          * best we can do. Writes and reads get combined in these cases.
 322          */
 323         [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
 324         [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_ICACHE_REFILL,
 325 
 326         [C(LL)][C(OP_READ)][C(RESULT_ACCESS)]   = ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_READ,
 327         [C(LL)][C(OP_READ)][C(RESULT_MISS)]     = ARMV7_A15_PERFCTR_L2_CACHE_REFILL_READ,
 328         [C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)]  = ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_WRITE,
 329         [C(LL)][C(OP_WRITE)][C(RESULT_MISS)]    = ARMV7_A15_PERFCTR_L2_CACHE_REFILL_WRITE,
 330 
 331         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_A15_PERFCTR_DTLB_REFILL_L1_READ,
 332         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_A15_PERFCTR_DTLB_REFILL_L1_WRITE,
 333 
 334         [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_ITLB_REFILL,
 335         [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_ITLB_REFILL,
 336 
 337         [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_PC_BRANCH_PRED,
 338         [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 339         [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 340         [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 341 };
 342 
 343 /*
 344  * Cortex-A7 HW events mapping
 345  */
 346 static const unsigned armv7_a7_perf_map[PERF_COUNT_HW_MAX] = {
 347         PERF_MAP_ALL_UNSUPPORTED,
 348         [PERF_COUNT_HW_CPU_CYCLES]              = ARMV7_PERFCTR_CPU_CYCLES,
 349         [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV7_PERFCTR_INSTR_EXECUTED,
 350         [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 351         [PERF_COUNT_HW_CACHE_MISSES]            = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 352         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV7_PERFCTR_PC_WRITE,
 353         [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 354         [PERF_COUNT_HW_BUS_CYCLES]              = ARMV7_PERFCTR_BUS_CYCLES,
 355 };
 356 
 357 static const unsigned armv7_a7_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 358                                         [PERF_COUNT_HW_CACHE_OP_MAX]
 359                                         [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
 360         PERF_CACHE_MAP_ALL_UNSUPPORTED,
 361 
 362         /*
 363          * The performance counters don't differentiate between read and write
 364          * accesses/misses so this isn't strictly correct, but it's the best we
 365          * can do. Writes and reads get combined.
 366          */
 367         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 368         [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 369         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 370         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 371 
 372         [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
 373         [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_ICACHE_REFILL,
 374 
 375         [C(LL)][C(OP_READ)][C(RESULT_ACCESS)]   = ARMV7_PERFCTR_L2_CACHE_ACCESS,
 376         [C(LL)][C(OP_READ)][C(RESULT_MISS)]     = ARMV7_PERFCTR_L2_CACHE_REFILL,
 377         [C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L2_CACHE_ACCESS,
 378         [C(LL)][C(OP_WRITE)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L2_CACHE_REFILL,
 379 
 380         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_DTLB_REFILL,
 381         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_DTLB_REFILL,
 382 
 383         [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_ITLB_REFILL,
 384         [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_ITLB_REFILL,
 385 
 386         [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_PC_BRANCH_PRED,
 387         [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 388         [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 389         [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 390 };
 391 
 392 /*
 393  * Cortex-A12 HW events mapping
 394  */
 395 static const unsigned armv7_a12_perf_map[PERF_COUNT_HW_MAX] = {
 396         PERF_MAP_ALL_UNSUPPORTED,
 397         [PERF_COUNT_HW_CPU_CYCLES]              = ARMV7_PERFCTR_CPU_CYCLES,
 398         [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV7_PERFCTR_INSTR_EXECUTED,
 399         [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 400         [PERF_COUNT_HW_CACHE_MISSES]            = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 401         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV7_A12_PERFCTR_PC_WRITE_SPEC,
 402         [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 403         [PERF_COUNT_HW_BUS_CYCLES]              = ARMV7_PERFCTR_BUS_CYCLES,
 404 };
 405 
 406 static const unsigned armv7_a12_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 407                                         [PERF_COUNT_HW_CACHE_OP_MAX]
 408                                         [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
 409         PERF_CACHE_MAP_ALL_UNSUPPORTED,
 410 
 411         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_A12_PERFCTR_L1_DCACHE_ACCESS_READ,
 412         [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 413         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_A12_PERFCTR_L1_DCACHE_ACCESS_WRITE,
 414         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 415 
 416         /*
 417          * Not all performance counters differentiate between read and write
 418          * accesses/misses so we're not always strictly correct, but it's the
 419          * best we can do. Writes and reads get combined in these cases.
 420          */
 421         [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
 422         [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_ICACHE_REFILL,
 423 
 424         [C(LL)][C(OP_READ)][C(RESULT_ACCESS)]   = ARMV7_A12_PERFCTR_L2_CACHE_ACCESS_READ,
 425         [C(LL)][C(OP_READ)][C(RESULT_MISS)]     = ARMV7_PERFCTR_L2_CACHE_REFILL,
 426         [C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)]  = ARMV7_A12_PERFCTR_L2_CACHE_ACCESS_WRITE,
 427         [C(LL)][C(OP_WRITE)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L2_CACHE_REFILL,
 428 
 429         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_DTLB_REFILL,
 430         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_DTLB_REFILL,
 431         [C(DTLB)][C(OP_PREFETCH)][C(RESULT_MISS)]       = ARMV7_A12_PERFCTR_PF_TLB_REFILL,
 432 
 433         [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV7_PERFCTR_ITLB_REFILL,
 434         [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV7_PERFCTR_ITLB_REFILL,
 435 
 436         [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_PC_BRANCH_PRED,
 437         [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 438         [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 439         [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 440 };
 441 
 442 /*
 443  * Krait HW events mapping
 444  */
 445 static const unsigned krait_perf_map[PERF_COUNT_HW_MAX] = {
 446         PERF_MAP_ALL_UNSUPPORTED,
 447         [PERF_COUNT_HW_CPU_CYCLES]          = ARMV7_PERFCTR_CPU_CYCLES,
 448         [PERF_COUNT_HW_INSTRUCTIONS]        = ARMV7_PERFCTR_INSTR_EXECUTED,
 449         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
 450         [PERF_COUNT_HW_BRANCH_MISSES]       = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 451         [PERF_COUNT_HW_BUS_CYCLES]          = ARMV7_PERFCTR_CLOCK_CYCLES,
 452 };
 453 
 454 static const unsigned krait_perf_map_no_branch[PERF_COUNT_HW_MAX] = {
 455         PERF_MAP_ALL_UNSUPPORTED,
 456         [PERF_COUNT_HW_CPU_CYCLES]          = ARMV7_PERFCTR_CPU_CYCLES,
 457         [PERF_COUNT_HW_INSTRUCTIONS]        = ARMV7_PERFCTR_INSTR_EXECUTED,
 458         [PERF_COUNT_HW_BRANCH_MISSES]       = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 459         [PERF_COUNT_HW_BUS_CYCLES]          = ARMV7_PERFCTR_CLOCK_CYCLES,
 460 };
 461 
 462 static const unsigned krait_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 463                                           [PERF_COUNT_HW_CACHE_OP_MAX]
 464                                           [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
 465         PERF_CACHE_MAP_ALL_UNSUPPORTED,
 466 
 467         /*
 468          * The performance counters don't differentiate between read and write
 469          * accesses/misses so this isn't strictly correct, but it's the best we
 470          * can do. Writes and reads get combined.
 471          */
 472         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 473         [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 474         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 475         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 476 
 477         [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = KRAIT_PERFCTR_L1_ICACHE_ACCESS,
 478         [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = KRAIT_PERFCTR_L1_ICACHE_MISS,
 479 
 480         [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = KRAIT_PERFCTR_L1_DTLB_ACCESS,
 481         [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)]        = KRAIT_PERFCTR_L1_DTLB_ACCESS,
 482 
 483         [C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = KRAIT_PERFCTR_L1_ITLB_ACCESS,
 484         [C(ITLB)][C(OP_WRITE)][C(RESULT_ACCESS)]        = KRAIT_PERFCTR_L1_ITLB_ACCESS,
 485 
 486         [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV7_PERFCTR_PC_BRANCH_PRED,
 487         [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 488         [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 489         [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 490 };
 491 
 492 /*
 493  * Scorpion HW events mapping
 494  */
 495 static const unsigned scorpion_perf_map[PERF_COUNT_HW_MAX] = {
 496         PERF_MAP_ALL_UNSUPPORTED,
 497         [PERF_COUNT_HW_CPU_CYCLES]          = ARMV7_PERFCTR_CPU_CYCLES,
 498         [PERF_COUNT_HW_INSTRUCTIONS]        = ARMV7_PERFCTR_INSTR_EXECUTED,
 499         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
 500         [PERF_COUNT_HW_BRANCH_MISSES]       = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 501         [PERF_COUNT_HW_BUS_CYCLES]          = ARMV7_PERFCTR_CLOCK_CYCLES,
 502 };
 503 
 504 static const unsigned scorpion_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
 505                                             [PERF_COUNT_HW_CACHE_OP_MAX]
 506                                             [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
 507         PERF_CACHE_MAP_ALL_UNSUPPORTED,
 508         /*
 509          * The performance counters don't differentiate between read and write
 510          * accesses/misses so this isn't strictly correct, but it's the best we
 511          * can do. Writes and reads get combined.
 512          */
 513         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 514         [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 515         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
 516         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
 517         [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = SCORPION_ICACHE_ACCESS,
 518         [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = SCORPION_ICACHE_MISS,
 519         /*
 520          * Only ITLB misses and DTLB refills are supported.  If users want the
 521          * DTLB refills misses a raw counter must be used.
 522          */
 523         [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = SCORPION_DTLB_ACCESS,
 524         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = SCORPION_DTLB_MISS,
 525         [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = SCORPION_DTLB_ACCESS,
 526         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = SCORPION_DTLB_MISS,
 527         [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = SCORPION_ITLB_MISS,
 528         [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = SCORPION_ITLB_MISS,
 529         [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 530         [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 531         [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
 532         [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
 533 };
 534 
 535 PMU_FORMAT_ATTR(event, "config:0-7");
 536 
 537 static struct attribute *armv7_pmu_format_attrs[] = {
 538         &format_attr_event.attr,
 539         NULL,
 540 };
 541 
 542 static struct attribute_group armv7_pmu_format_attr_group = {
 543         .name = "format",
 544         .attrs = armv7_pmu_format_attrs,
 545 };
 546 
 547 #define ARMV7_EVENT_ATTR_RESOLVE(m) #m
 548 #define ARMV7_EVENT_ATTR(name, config) \
 549         PMU_EVENT_ATTR_STRING(name, armv7_event_attr_##name, \
 550                               "event=" ARMV7_EVENT_ATTR_RESOLVE(config))
 551 
 552 ARMV7_EVENT_ATTR(sw_incr, ARMV7_PERFCTR_PMNC_SW_INCR);
 553 ARMV7_EVENT_ATTR(l1i_cache_refill, ARMV7_PERFCTR_L1_ICACHE_REFILL);
 554 ARMV7_EVENT_ATTR(l1i_tlb_refill, ARMV7_PERFCTR_ITLB_REFILL);
 555 ARMV7_EVENT_ATTR(l1d_cache_refill, ARMV7_PERFCTR_L1_DCACHE_REFILL);
 556 ARMV7_EVENT_ATTR(l1d_cache, ARMV7_PERFCTR_L1_DCACHE_ACCESS);
 557 ARMV7_EVENT_ATTR(l1d_tlb_refill, ARMV7_PERFCTR_DTLB_REFILL);
 558 ARMV7_EVENT_ATTR(ld_retired, ARMV7_PERFCTR_MEM_READ);
 559 ARMV7_EVENT_ATTR(st_retired, ARMV7_PERFCTR_MEM_WRITE);
 560 ARMV7_EVENT_ATTR(inst_retired, ARMV7_PERFCTR_INSTR_EXECUTED);
 561 ARMV7_EVENT_ATTR(exc_taken, ARMV7_PERFCTR_EXC_TAKEN);
 562 ARMV7_EVENT_ATTR(exc_return, ARMV7_PERFCTR_EXC_EXECUTED);
 563 ARMV7_EVENT_ATTR(cid_write_retired, ARMV7_PERFCTR_CID_WRITE);
 564 ARMV7_EVENT_ATTR(pc_write_retired, ARMV7_PERFCTR_PC_WRITE);
 565 ARMV7_EVENT_ATTR(br_immed_retired, ARMV7_PERFCTR_PC_IMM_BRANCH);
 566 ARMV7_EVENT_ATTR(br_return_retired, ARMV7_PERFCTR_PC_PROC_RETURN);
 567 ARMV7_EVENT_ATTR(unaligned_ldst_retired, ARMV7_PERFCTR_MEM_UNALIGNED_ACCESS);
 568 ARMV7_EVENT_ATTR(br_mis_pred, ARMV7_PERFCTR_PC_BRANCH_MIS_PRED);
 569 ARMV7_EVENT_ATTR(cpu_cycles, ARMV7_PERFCTR_CLOCK_CYCLES);
 570 ARMV7_EVENT_ATTR(br_pred, ARMV7_PERFCTR_PC_BRANCH_PRED);
 571 
 572 static struct attribute *armv7_pmuv1_event_attrs[] = {
 573         &armv7_event_attr_sw_incr.attr.attr,
 574         &armv7_event_attr_l1i_cache_refill.attr.attr,
 575         &armv7_event_attr_l1i_tlb_refill.attr.attr,
 576         &armv7_event_attr_l1d_cache_refill.attr.attr,
 577         &armv7_event_attr_l1d_cache.attr.attr,
 578         &armv7_event_attr_l1d_tlb_refill.attr.attr,
 579         &armv7_event_attr_ld_retired.attr.attr,
 580         &armv7_event_attr_st_retired.attr.attr,
 581         &armv7_event_attr_inst_retired.attr.attr,
 582         &armv7_event_attr_exc_taken.attr.attr,
 583         &armv7_event_attr_exc_return.attr.attr,
 584         &armv7_event_attr_cid_write_retired.attr.attr,
 585         &armv7_event_attr_pc_write_retired.attr.attr,
 586         &armv7_event_attr_br_immed_retired.attr.attr,
 587         &armv7_event_attr_br_return_retired.attr.attr,
 588         &armv7_event_attr_unaligned_ldst_retired.attr.attr,
 589         &armv7_event_attr_br_mis_pred.attr.attr,
 590         &armv7_event_attr_cpu_cycles.attr.attr,
 591         &armv7_event_attr_br_pred.attr.attr,
 592         NULL,
 593 };
 594 
 595 static struct attribute_group armv7_pmuv1_events_attr_group = {
 596         .name = "events",
 597         .attrs = armv7_pmuv1_event_attrs,
 598 };
 599 
 600 ARMV7_EVENT_ATTR(mem_access, ARMV7_PERFCTR_MEM_ACCESS);
 601 ARMV7_EVENT_ATTR(l1i_cache, ARMV7_PERFCTR_L1_ICACHE_ACCESS);
 602 ARMV7_EVENT_ATTR(l1d_cache_wb, ARMV7_PERFCTR_L1_DCACHE_WB);
 603 ARMV7_EVENT_ATTR(l2d_cache, ARMV7_PERFCTR_L2_CACHE_ACCESS);
 604 ARMV7_EVENT_ATTR(l2d_cache_refill, ARMV7_PERFCTR_L2_CACHE_REFILL);
 605 ARMV7_EVENT_ATTR(l2d_cache_wb, ARMV7_PERFCTR_L2_CACHE_WB);
 606 ARMV7_EVENT_ATTR(bus_access, ARMV7_PERFCTR_BUS_ACCESS);
 607 ARMV7_EVENT_ATTR(memory_error, ARMV7_PERFCTR_MEM_ERROR);
 608 ARMV7_EVENT_ATTR(inst_spec, ARMV7_PERFCTR_INSTR_SPEC);
 609 ARMV7_EVENT_ATTR(ttbr_write_retired, ARMV7_PERFCTR_TTBR_WRITE);
 610 ARMV7_EVENT_ATTR(bus_cycles, ARMV7_PERFCTR_BUS_CYCLES);
 611 
 612 static struct attribute *armv7_pmuv2_event_attrs[] = {
 613         &armv7_event_attr_sw_incr.attr.attr,
 614         &armv7_event_attr_l1i_cache_refill.attr.attr,
 615         &armv7_event_attr_l1i_tlb_refill.attr.attr,
 616         &armv7_event_attr_l1d_cache_refill.attr.attr,
 617         &armv7_event_attr_l1d_cache.attr.attr,
 618         &armv7_event_attr_l1d_tlb_refill.attr.attr,
 619         &armv7_event_attr_ld_retired.attr.attr,
 620         &armv7_event_attr_st_retired.attr.attr,
 621         &armv7_event_attr_inst_retired.attr.attr,
 622         &armv7_event_attr_exc_taken.attr.attr,
 623         &armv7_event_attr_exc_return.attr.attr,
 624         &armv7_event_attr_cid_write_retired.attr.attr,
 625         &armv7_event_attr_pc_write_retired.attr.attr,
 626         &armv7_event_attr_br_immed_retired.attr.attr,
 627         &armv7_event_attr_br_return_retired.attr.attr,
 628         &armv7_event_attr_unaligned_ldst_retired.attr.attr,
 629         &armv7_event_attr_br_mis_pred.attr.attr,
 630         &armv7_event_attr_cpu_cycles.attr.attr,
 631         &armv7_event_attr_br_pred.attr.attr,
 632         &armv7_event_attr_mem_access.attr.attr,
 633         &armv7_event_attr_l1i_cache.attr.attr,
 634         &armv7_event_attr_l1d_cache_wb.attr.attr,
 635         &armv7_event_attr_l2d_cache.attr.attr,
 636         &armv7_event_attr_l2d_cache_refill.attr.attr,
 637         &armv7_event_attr_l2d_cache_wb.attr.attr,
 638         &armv7_event_attr_bus_access.attr.attr,
 639         &armv7_event_attr_memory_error.attr.attr,
 640         &armv7_event_attr_inst_spec.attr.attr,
 641         &armv7_event_attr_ttbr_write_retired.attr.attr,
 642         &armv7_event_attr_bus_cycles.attr.attr,
 643         NULL,
 644 };
 645 
 646 static struct attribute_group armv7_pmuv2_events_attr_group = {
 647         .name = "events",
 648         .attrs = armv7_pmuv2_event_attrs,
 649 };
 650 
 651 /*
 652  * Perf Events' indices
 653  */
 654 #define ARMV7_IDX_CYCLE_COUNTER 0
 655 #define ARMV7_IDX_COUNTER0      1
 656 #define ARMV7_IDX_COUNTER_LAST(cpu_pmu) \
 657         (ARMV7_IDX_CYCLE_COUNTER + cpu_pmu->num_events - 1)
 658 
 659 #define ARMV7_MAX_COUNTERS      32
 660 #define ARMV7_COUNTER_MASK      (ARMV7_MAX_COUNTERS - 1)
 661 
 662 /*
 663  * ARMv7 low level PMNC access
 664  */
 665 
 666 /*
 667  * Perf Event to low level counters mapping
 668  */
 669 #define ARMV7_IDX_TO_COUNTER(x) \
 670         (((x) - ARMV7_IDX_COUNTER0) & ARMV7_COUNTER_MASK)
 671 
 672 /*
 673  * Per-CPU PMNC: config reg
 674  */
 675 #define ARMV7_PMNC_E            (1 << 0) /* Enable all counters */
 676 #define ARMV7_PMNC_P            (1 << 1) /* Reset all counters */
 677 #define ARMV7_PMNC_C            (1 << 2) /* Cycle counter reset */
 678 #define ARMV7_PMNC_D            (1 << 3) /* CCNT counts every 64th cpu cycle */
 679 #define ARMV7_PMNC_X            (1 << 4) /* Export to ETM */
 680 #define ARMV7_PMNC_DP           (1 << 5) /* Disable CCNT if non-invasive debug*/
 681 #define ARMV7_PMNC_N_SHIFT      11       /* Number of counters supported */
 682 #define ARMV7_PMNC_N_MASK       0x1f
 683 #define ARMV7_PMNC_MASK         0x3f     /* Mask for writable bits */
 684 
 685 /*
 686  * FLAG: counters overflow flag status reg
 687  */
 688 #define ARMV7_FLAG_MASK         0xffffffff      /* Mask for writable bits */
 689 #define ARMV7_OVERFLOWED_MASK   ARMV7_FLAG_MASK
 690 
 691 /*
 692  * PMXEVTYPER: Event selection reg
 693  */
 694 #define ARMV7_EVTYPE_MASK       0xc80000ff      /* Mask for writable bits */
 695 #define ARMV7_EVTYPE_EVENT      0xff            /* Mask for EVENT bits */
 696 
 697 /*
 698  * Event filters for PMUv2
 699  */
 700 #define ARMV7_EXCLUDE_PL1       BIT(31)
 701 #define ARMV7_EXCLUDE_USER      BIT(30)
 702 #define ARMV7_INCLUDE_HYP       BIT(27)
 703 
 704 /*
 705  * Secure debug enable reg
 706  */
 707 #define ARMV7_SDER_SUNIDEN      BIT(1) /* Permit non-invasive debug */
 708 
 709 static inline u32 armv7_pmnc_read(void)
 710 {
 711         u32 val;
 712         asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val));
 713         return val;
 714 }
 715 
 716 static inline void armv7_pmnc_write(u32 val)
 717 {
 718         val &= ARMV7_PMNC_MASK;
 719         isb();
 720         asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val));
 721 }
 722 
 723 static inline int armv7_pmnc_has_overflowed(u32 pmnc)
 724 {
 725         return pmnc & ARMV7_OVERFLOWED_MASK;
 726 }
 727 
 728 static inline int armv7_pmnc_counter_valid(struct arm_pmu *cpu_pmu, int idx)
 729 {
 730         return idx >= ARMV7_IDX_CYCLE_COUNTER &&
 731                 idx <= ARMV7_IDX_COUNTER_LAST(cpu_pmu);
 732 }
 733 
 734 static inline int armv7_pmnc_counter_has_overflowed(u32 pmnc, int idx)
 735 {
 736         return pmnc & BIT(ARMV7_IDX_TO_COUNTER(idx));
 737 }
 738 
 739 static inline void armv7_pmnc_select_counter(int idx)
 740 {
 741         u32 counter = ARMV7_IDX_TO_COUNTER(idx);
 742         asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (counter));
 743         isb();
 744 }
 745 
 746 static inline u64 armv7pmu_read_counter(struct perf_event *event)
 747 {
 748         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
 749         struct hw_perf_event *hwc = &event->hw;
 750         int idx = hwc->idx;
 751         u32 value = 0;
 752 
 753         if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
 754                 pr_err("CPU%u reading wrong counter %d\n",
 755                         smp_processor_id(), idx);
 756         } else if (idx == ARMV7_IDX_CYCLE_COUNTER) {
 757                 asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
 758         } else {
 759                 armv7_pmnc_select_counter(idx);
 760                 asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (value));
 761         }
 762 
 763         return value;
 764 }
 765 
 766 static inline void armv7pmu_write_counter(struct perf_event *event, u64 value)
 767 {
 768         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
 769         struct hw_perf_event *hwc = &event->hw;
 770         int idx = hwc->idx;
 771 
 772         if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
 773                 pr_err("CPU%u writing wrong counter %d\n",
 774                         smp_processor_id(), idx);
 775         } else if (idx == ARMV7_IDX_CYCLE_COUNTER) {
 776                 asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value));
 777         } else {
 778                 armv7_pmnc_select_counter(idx);
 779                 asm volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" (value));
 780         }
 781 }
 782 
 783 static inline void armv7_pmnc_write_evtsel(int idx, u32 val)
 784 {
 785         armv7_pmnc_select_counter(idx);
 786         val &= ARMV7_EVTYPE_MASK;
 787         asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
 788 }
 789 
 790 static inline void armv7_pmnc_enable_counter(int idx)
 791 {
 792         u32 counter = ARMV7_IDX_TO_COUNTER(idx);
 793         asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (BIT(counter)));
 794 }
 795 
 796 static inline void armv7_pmnc_disable_counter(int idx)
 797 {
 798         u32 counter = ARMV7_IDX_TO_COUNTER(idx);
 799         asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (BIT(counter)));
 800 }
 801 
 802 static inline void armv7_pmnc_enable_intens(int idx)
 803 {
 804         u32 counter = ARMV7_IDX_TO_COUNTER(idx);
 805         asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (BIT(counter)));
 806 }
 807 
 808 static inline void armv7_pmnc_disable_intens(int idx)
 809 {
 810         u32 counter = ARMV7_IDX_TO_COUNTER(idx);
 811         asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (BIT(counter)));
 812         isb();
 813         /* Clear the overflow flag in case an interrupt is pending. */
 814         asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (BIT(counter)));
 815         isb();
 816 }
 817 
 818 static inline u32 armv7_pmnc_getreset_flags(void)
 819 {
 820         u32 val;
 821 
 822         /* Read */
 823         asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
 824 
 825         /* Write to clear flags */
 826         val &= ARMV7_FLAG_MASK;
 827         asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val));
 828 
 829         return val;
 830 }
 831 
 832 #ifdef DEBUG
 833 static void armv7_pmnc_dump_regs(struct arm_pmu *cpu_pmu)
 834 {
 835         u32 val;
 836         unsigned int cnt;
 837 
 838         pr_info("PMNC registers dump:\n");
 839 
 840         asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val));
 841         pr_info("PMNC  =0x%08x\n", val);
 842 
 843         asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val));
 844         pr_info("CNTENS=0x%08x\n", val);
 845 
 846         asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val));
 847         pr_info("INTENS=0x%08x\n", val);
 848 
 849         asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
 850         pr_info("FLAGS =0x%08x\n", val);
 851 
 852         asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val));
 853         pr_info("SELECT=0x%08x\n", val);
 854 
 855         asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
 856         pr_info("CCNT  =0x%08x\n", val);
 857 
 858         for (cnt = ARMV7_IDX_COUNTER0;
 859                         cnt <= ARMV7_IDX_COUNTER_LAST(cpu_pmu); cnt++) {
 860                 armv7_pmnc_select_counter(cnt);
 861                 asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val));
 862                 pr_info("CNT[%d] count =0x%08x\n",
 863                         ARMV7_IDX_TO_COUNTER(cnt), val);
 864                 asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
 865                 pr_info("CNT[%d] evtsel=0x%08x\n",
 866                         ARMV7_IDX_TO_COUNTER(cnt), val);
 867         }
 868 }
 869 #endif
 870 
 871 static void armv7pmu_enable_event(struct perf_event *event)
 872 {
 873         unsigned long flags;
 874         struct hw_perf_event *hwc = &event->hw;
 875         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
 876         struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
 877         int idx = hwc->idx;
 878 
 879         if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
 880                 pr_err("CPU%u enabling wrong PMNC counter IRQ enable %d\n",
 881                         smp_processor_id(), idx);
 882                 return;
 883         }
 884 
 885         /*
 886          * Enable counter and interrupt, and set the counter to count
 887          * the event that we're interested in.
 888          */
 889         raw_spin_lock_irqsave(&events->pmu_lock, flags);
 890 
 891         /*
 892          * Disable counter
 893          */
 894         armv7_pmnc_disable_counter(idx);
 895 
 896         /*
 897          * Set event (if destined for PMNx counters)
 898          * We only need to set the event for the cycle counter if we
 899          * have the ability to perform event filtering.
 900          */
 901         if (cpu_pmu->set_event_filter || idx != ARMV7_IDX_CYCLE_COUNTER)
 902                 armv7_pmnc_write_evtsel(idx, hwc->config_base);
 903 
 904         /*
 905          * Enable interrupt for this counter
 906          */
 907         armv7_pmnc_enable_intens(idx);
 908 
 909         /*
 910          * Enable counter
 911          */
 912         armv7_pmnc_enable_counter(idx);
 913 
 914         raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
 915 }
 916 
 917 static void armv7pmu_disable_event(struct perf_event *event)
 918 {
 919         unsigned long flags;
 920         struct hw_perf_event *hwc = &event->hw;
 921         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
 922         struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
 923         int idx = hwc->idx;
 924 
 925         if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
 926                 pr_err("CPU%u disabling wrong PMNC counter IRQ enable %d\n",
 927                         smp_processor_id(), idx);
 928                 return;
 929         }
 930 
 931         /*
 932          * Disable counter and interrupt
 933          */
 934         raw_spin_lock_irqsave(&events->pmu_lock, flags);
 935 
 936         /*
 937          * Disable counter
 938          */
 939         armv7_pmnc_disable_counter(idx);
 940 
 941         /*
 942          * Disable interrupt for this counter
 943          */
 944         armv7_pmnc_disable_intens(idx);
 945 
 946         raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
 947 }
 948 
 949 static irqreturn_t armv7pmu_handle_irq(struct arm_pmu *cpu_pmu)
 950 {
 951         u32 pmnc;
 952         struct perf_sample_data data;
 953         struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
 954         struct pt_regs *regs;
 955         int idx;
 956 
 957         /*
 958          * Get and reset the IRQ flags
 959          */
 960         pmnc = armv7_pmnc_getreset_flags();
 961 
 962         /*
 963          * Did an overflow occur?
 964          */
 965         if (!armv7_pmnc_has_overflowed(pmnc))
 966                 return IRQ_NONE;
 967 
 968         /*
 969          * Handle the counter(s) overflow(s)
 970          */
 971         regs = get_irq_regs();
 972 
 973         for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
 974                 struct perf_event *event = cpuc->events[idx];
 975                 struct hw_perf_event *hwc;
 976 
 977                 /* Ignore if we don't have an event. */
 978                 if (!event)
 979                         continue;
 980 
 981                 /*
 982                  * We have a single interrupt for all counters. Check that
 983                  * each counter has overflowed before we process it.
 984                  */
 985                 if (!armv7_pmnc_counter_has_overflowed(pmnc, idx))
 986                         continue;
 987 
 988                 hwc = &event->hw;
 989                 armpmu_event_update(event);
 990                 perf_sample_data_init(&data, 0, hwc->last_period);
 991                 if (!armpmu_event_set_period(event))
 992                         continue;
 993 
 994                 if (perf_event_overflow(event, &data, regs))
 995                         cpu_pmu->disable(event);
 996         }
 997 
 998         /*
 999          * Handle the pending perf events.
1000          *
1001          * Note: this call *must* be run with interrupts disabled. For
1002          * platforms that can have the PMU interrupts raised as an NMI, this
1003          * will not work.
1004          */
1005         irq_work_run();
1006 
1007         return IRQ_HANDLED;
1008 }
1009 
1010 static void armv7pmu_start(struct arm_pmu *cpu_pmu)
1011 {
1012         unsigned long flags;
1013         struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
1014 
1015         raw_spin_lock_irqsave(&events->pmu_lock, flags);
1016         /* Enable all counters */
1017         armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E);
1018         raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
1019 }
1020 
1021 static void armv7pmu_stop(struct arm_pmu *cpu_pmu)
1022 {
1023         unsigned long flags;
1024         struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
1025 
1026         raw_spin_lock_irqsave(&events->pmu_lock, flags);
1027         /* Disable all counters */
1028         armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E);
1029         raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
1030 }
1031 
1032 static int armv7pmu_get_event_idx(struct pmu_hw_events *cpuc,
1033                                   struct perf_event *event)
1034 {
1035         int idx;
1036         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
1037         struct hw_perf_event *hwc = &event->hw;
1038         unsigned long evtype = hwc->config_base & ARMV7_EVTYPE_EVENT;
1039 
1040         /* Always place a cycle counter into the cycle counter. */
1041         if (evtype == ARMV7_PERFCTR_CPU_CYCLES) {
1042                 if (test_and_set_bit(ARMV7_IDX_CYCLE_COUNTER, cpuc->used_mask))
1043                         return -EAGAIN;
1044 
1045                 return ARMV7_IDX_CYCLE_COUNTER;
1046         }
1047 
1048         /*
1049          * For anything other than a cycle counter, try and use
1050          * the events counters
1051          */
1052         for (idx = ARMV7_IDX_COUNTER0; idx < cpu_pmu->num_events; ++idx) {
1053                 if (!test_and_set_bit(idx, cpuc->used_mask))
1054                         return idx;
1055         }
1056 
1057         /* The counters are all in use. */
1058         return -EAGAIN;
1059 }
1060 
1061 static void armv7pmu_clear_event_idx(struct pmu_hw_events *cpuc,
1062                                      struct perf_event *event)
1063 {
1064         clear_bit(event->hw.idx, cpuc->used_mask);
1065 }
1066 
1067 /*
1068  * Add an event filter to a given event. This will only work for PMUv2 PMUs.
1069  */
1070 static int armv7pmu_set_event_filter(struct hw_perf_event *event,
1071                                      struct perf_event_attr *attr)
1072 {
1073         unsigned long config_base = 0;
1074 
1075         if (attr->exclude_idle)
1076                 return -EPERM;
1077         if (attr->exclude_user)
1078                 config_base |= ARMV7_EXCLUDE_USER;
1079         if (attr->exclude_kernel)
1080                 config_base |= ARMV7_EXCLUDE_PL1;
1081         if (!attr->exclude_hv)
1082                 config_base |= ARMV7_INCLUDE_HYP;
1083 
1084         /*
1085          * Install the filter into config_base as this is used to
1086          * construct the event type.
1087          */
1088         event->config_base = config_base;
1089 
1090         return 0;
1091 }
1092 
1093 static void armv7pmu_reset(void *info)
1094 {
1095         struct arm_pmu *cpu_pmu = (struct arm_pmu *)info;
1096         u32 idx, nb_cnt = cpu_pmu->num_events, val;
1097 
1098         if (cpu_pmu->secure_access) {
1099                 asm volatile("mrc p15, 0, %0, c1, c1, 1" : "=r" (val));
1100                 val |= ARMV7_SDER_SUNIDEN;
1101                 asm volatile("mcr p15, 0, %0, c1, c1, 1" : : "r" (val));
1102         }
1103 
1104         /* The counter and interrupt enable registers are unknown at reset. */
1105         for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) {
1106                 armv7_pmnc_disable_counter(idx);
1107                 armv7_pmnc_disable_intens(idx);
1108         }
1109 
1110         /* Initialize & Reset PMNC: C and P bits */
1111         armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
1112 }
1113 
1114 static int armv7_a8_map_event(struct perf_event *event)
1115 {
1116         return armpmu_map_event(event, &armv7_a8_perf_map,
1117                                 &armv7_a8_perf_cache_map, 0xFF);
1118 }
1119 
1120 static int armv7_a9_map_event(struct perf_event *event)
1121 {
1122         return armpmu_map_event(event, &armv7_a9_perf_map,
1123                                 &armv7_a9_perf_cache_map, 0xFF);
1124 }
1125 
1126 static int armv7_a5_map_event(struct perf_event *event)
1127 {
1128         return armpmu_map_event(event, &armv7_a5_perf_map,
1129                                 &armv7_a5_perf_cache_map, 0xFF);
1130 }
1131 
1132 static int armv7_a15_map_event(struct perf_event *event)
1133 {
1134         return armpmu_map_event(event, &armv7_a15_perf_map,
1135                                 &armv7_a15_perf_cache_map, 0xFF);
1136 }
1137 
1138 static int armv7_a7_map_event(struct perf_event *event)
1139 {
1140         return armpmu_map_event(event, &armv7_a7_perf_map,
1141                                 &armv7_a7_perf_cache_map, 0xFF);
1142 }
1143 
1144 static int armv7_a12_map_event(struct perf_event *event)
1145 {
1146         return armpmu_map_event(event, &armv7_a12_perf_map,
1147                                 &armv7_a12_perf_cache_map, 0xFF);
1148 }
1149 
1150 static int krait_map_event(struct perf_event *event)
1151 {
1152         return armpmu_map_event(event, &krait_perf_map,
1153                                 &krait_perf_cache_map, 0xFFFFF);
1154 }
1155 
1156 static int krait_map_event_no_branch(struct perf_event *event)
1157 {
1158         return armpmu_map_event(event, &krait_perf_map_no_branch,
1159                                 &krait_perf_cache_map, 0xFFFFF);
1160 }
1161 
1162 static int scorpion_map_event(struct perf_event *event)
1163 {
1164         return armpmu_map_event(event, &scorpion_perf_map,
1165                                 &scorpion_perf_cache_map, 0xFFFFF);
1166 }
1167 
1168 static void armv7pmu_init(struct arm_pmu *cpu_pmu)
1169 {
1170         cpu_pmu->handle_irq     = armv7pmu_handle_irq;
1171         cpu_pmu->enable         = armv7pmu_enable_event;
1172         cpu_pmu->disable        = armv7pmu_disable_event;
1173         cpu_pmu->read_counter   = armv7pmu_read_counter;
1174         cpu_pmu->write_counter  = armv7pmu_write_counter;
1175         cpu_pmu->get_event_idx  = armv7pmu_get_event_idx;
1176         cpu_pmu->clear_event_idx = armv7pmu_clear_event_idx;
1177         cpu_pmu->start          = armv7pmu_start;
1178         cpu_pmu->stop           = armv7pmu_stop;
1179         cpu_pmu->reset          = armv7pmu_reset;
1180 };
1181 
1182 static void armv7_read_num_pmnc_events(void *info)
1183 {
1184         int *nb_cnt = info;
1185 
1186         /* Read the nb of CNTx counters supported from PMNC */
1187         *nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK;
1188 
1189         /* Add the CPU cycles counter */
1190         *nb_cnt += 1;
1191 }
1192 
1193 static int armv7_probe_num_events(struct arm_pmu *arm_pmu)
1194 {
1195         return smp_call_function_any(&arm_pmu->supported_cpus,
1196                                      armv7_read_num_pmnc_events,
1197                                      &arm_pmu->num_events, 1);
1198 }
1199 
1200 static int armv7_a8_pmu_init(struct arm_pmu *cpu_pmu)
1201 {
1202         armv7pmu_init(cpu_pmu);
1203         cpu_pmu->name           = "armv7_cortex_a8";
1204         cpu_pmu->map_event      = armv7_a8_map_event;
1205         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
1206                 &armv7_pmuv1_events_attr_group;
1207         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
1208                 &armv7_pmu_format_attr_group;
1209         return armv7_probe_num_events(cpu_pmu);
1210 }
1211 
1212 static int armv7_a9_pmu_init(struct arm_pmu *cpu_pmu)
1213 {
1214         armv7pmu_init(cpu_pmu);
1215         cpu_pmu->name           = "armv7_cortex_a9";
1216         cpu_pmu->map_event      = armv7_a9_map_event;
1217         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
1218                 &armv7_pmuv1_events_attr_group;
1219         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
1220                 &armv7_pmu_format_attr_group;
1221         return armv7_probe_num_events(cpu_pmu);
1222 }
1223 
1224 static int armv7_a5_pmu_init(struct arm_pmu *cpu_pmu)
1225 {
1226         armv7pmu_init(cpu_pmu);
1227         cpu_pmu->name           = "armv7_cortex_a5";
1228         cpu_pmu->map_event      = armv7_a5_map_event;
1229         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
1230                 &armv7_pmuv1_events_attr_group;
1231         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
1232                 &armv7_pmu_format_attr_group;
1233         return armv7_probe_num_events(cpu_pmu);
1234 }
1235 
1236 static int armv7_a15_pmu_init(struct arm_pmu *cpu_pmu)
1237 {
1238         armv7pmu_init(cpu_pmu);
1239         cpu_pmu->name           = "armv7_cortex_a15";
1240         cpu_pmu->map_event      = armv7_a15_map_event;
1241         cpu_pmu->set_event_filter = armv7pmu_set_event_filter;
1242         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
1243                 &armv7_pmuv2_events_attr_group;
1244         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
1245                 &armv7_pmu_format_attr_group;
1246         return armv7_probe_num_events(cpu_pmu);
1247 }
1248 
1249 static int armv7_a7_pmu_init(struct arm_pmu *cpu_pmu)
1250 {
1251         armv7pmu_init(cpu_pmu);
1252         cpu_pmu->name           = "armv7_cortex_a7";
1253         cpu_pmu->map_event      = armv7_a7_map_event;
1254         cpu_pmu->set_event_filter = armv7pmu_set_event_filter;
1255         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
1256                 &armv7_pmuv2_events_attr_group;
1257         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
1258                 &armv7_pmu_format_attr_group;
1259         return armv7_probe_num_events(cpu_pmu);
1260 }
1261 
1262 static int armv7_a12_pmu_init(struct arm_pmu *cpu_pmu)
1263 {
1264         armv7pmu_init(cpu_pmu);
1265         cpu_pmu->name           = "armv7_cortex_a12";
1266         cpu_pmu->map_event      = armv7_a12_map_event;
1267         cpu_pmu->set_event_filter = armv7pmu_set_event_filter;
1268         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
1269                 &armv7_pmuv2_events_attr_group;
1270         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
1271                 &armv7_pmu_format_attr_group;
1272         return armv7_probe_num_events(cpu_pmu);
1273 }
1274 
1275 static int armv7_a17_pmu_init(struct arm_pmu *cpu_pmu)
1276 {
1277         int ret = armv7_a12_pmu_init(cpu_pmu);
1278         cpu_pmu->name = "armv7_cortex_a17";
1279         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
1280                 &armv7_pmuv2_events_attr_group;
1281         cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
1282                 &armv7_pmu_format_attr_group;
1283         return ret;
1284 }
1285 
1286 /*
1287  * Krait Performance Monitor Region Event Selection Register (PMRESRn)
1288  *
1289  *            31   30     24     16     8      0
1290  *            +--------------------------------+
1291  *  PMRESR0   | EN |  CC  |  CC  |  CC  |  CC  |   N = 1, R = 0
1292  *            +--------------------------------+
1293  *  PMRESR1   | EN |  CC  |  CC  |  CC  |  CC  |   N = 1, R = 1
1294  *            +--------------------------------+
1295  *  PMRESR2   | EN |  CC  |  CC  |  CC  |  CC  |   N = 1, R = 2
1296  *            +--------------------------------+
1297  *  VPMRESR0  | EN |  CC  |  CC  |  CC  |  CC  |   N = 2, R = ?
1298  *            +--------------------------------+
1299  *              EN | G=3  | G=2  | G=1  | G=0
1300  *
1301  *  Event Encoding:
1302  *
1303  *      hwc->config_base = 0xNRCCG
1304  *
1305  *      N  = prefix, 1 for Krait CPU (PMRESRn), 2 for Venum VFP (VPMRESR)
1306  *      R  = region register
1307  *      CC = class of events the group G is choosing from
1308  *      G  = group or particular event
1309  *
1310  *  Example: 0x12021 is a Krait CPU event in PMRESR2's group 1 with code 2
1311  *
1312  *  A region (R) corresponds to a piece of the CPU (execution unit, instruction
1313  *  unit, etc.) while the event code (CC) corresponds to a particular class of
1314  *  events (interrupts for example). An event code is broken down into
1315  *  groups (G) that can be mapped into the PMU (irq, fiqs, and irq+fiqs for
1316  *  example).
1317  */
1318 
1319 #define KRAIT_EVENT             (1 << 16)
1320 #define VENUM_EVENT             (2 << 16)
1321 #define KRAIT_EVENT_MASK        (KRAIT_EVENT | VENUM_EVENT)
1322 #define PMRESRn_EN              BIT(31)
1323 
1324 #define EVENT_REGION(event)     (((event) >> 12) & 0xf)         /* R */
1325 #define EVENT_GROUP(event)      ((event) & 0xf)                 /* G */
1326 #define EVENT_CODE(event)       (((event) >> 4) & 0xff)         /* CC */
1327 #define EVENT_VENUM(event)      (!!(event & VENUM_EVENT))       /* N=2 */
1328 #define EVENT_CPU(event)        (!!(event & KRAIT_EVENT))       /* N=1 */
1329 
1330 static u32 krait_read_pmresrn(int n)
1331 {
1332         u32 val;
1333 
1334         switch (n) {
1335         case 0:
1336                 asm volatile("mrc p15, 1, %0, c9, c15, 0" : "=r" (val));
1337                 break;
1338         case 1:
1339                 asm volatile("mrc p15, 1, %0, c9, c15, 1" : "=r" (val));
1340                 break;
1341         case 2:
1342                 asm volatile("mrc p15, 1, %0, c9, c15, 2" : "=r" (val));
1343                 break;
1344         default:
1345                 BUG(); /* Should be validated in krait_pmu_get_event_idx() */
1346         }
1347 
1348         return val;
1349 }
1350 
1351 static void krait_write_pmresrn(int n, u32 val)
1352 {
1353         switch (n) {
1354         case 0:
1355                 asm volatile("mcr p15, 1, %0, c9, c15, 0" : : "r" (val));
1356                 break;
1357         case 1:
1358                 asm volatile("mcr p15, 1, %0, c9, c15, 1" : : "r" (val));
1359                 break;
1360         case 2:
1361                 asm volatile("mcr p15, 1, %0, c9, c15, 2" : : "r" (val));
1362                 break;
1363         default:
1364                 BUG(); /* Should be validated in krait_pmu_get_event_idx() */
1365         }
1366 }
1367 
1368 static u32 venum_read_pmresr(void)
1369 {
1370         u32 val;
1371         asm volatile("mrc p10, 7, %0, c11, c0, 0" : "=r" (val));
1372         return val;
1373 }
1374 
1375 static void venum_write_pmresr(u32 val)
1376 {
1377         asm volatile("mcr p10, 7, %0, c11, c0, 0" : : "r" (val));
1378 }
1379 
1380 static void venum_pre_pmresr(u32 *venum_orig_val, u32 *fp_orig_val)
1381 {
1382         u32 venum_new_val;
1383         u32 fp_new_val;
1384 
1385         BUG_ON(preemptible());
1386         /* CPACR Enable CP10 and CP11 access */
1387         *venum_orig_val = get_copro_access();
1388         venum_new_val = *venum_orig_val | CPACC_SVC(10) | CPACC_SVC(11);
1389         set_copro_access(venum_new_val);
1390 
1391         /* Enable FPEXC */
1392         *fp_orig_val = fmrx(FPEXC);
1393         fp_new_val = *fp_orig_val | FPEXC_EN;
1394         fmxr(FPEXC, fp_new_val);
1395 }
1396 
1397 static void venum_post_pmresr(u32 venum_orig_val, u32 fp_orig_val)
1398 {
1399         BUG_ON(preemptible());
1400         /* Restore FPEXC */
1401         fmxr(FPEXC, fp_orig_val);
1402         isb();
1403         /* Restore CPACR */
1404         set_copro_access(venum_orig_val);
1405 }
1406 
1407 static u32 krait_get_pmresrn_event(unsigned int region)
1408 {
1409         static const u32 pmresrn_table[] = { KRAIT_PMRESR0_GROUP0,
1410                                              KRAIT_PMRESR1_GROUP0,
1411                                              KRAIT_PMRESR2_GROUP0 };
1412         return pmresrn_table[region];
1413 }
1414 
1415 static void krait_evt_setup(int idx, u32 config_base)
1416 {
1417         u32 val;
1418         u32 mask;
1419         u32 vval, fval;
1420         unsigned int region = EVENT_REGION(config_base);
1421         unsigned int group = EVENT_GROUP(config_base);
1422         unsigned int code = EVENT_CODE(config_base);
1423         unsigned int group_shift;
1424         bool venum_event = EVENT_VENUM(config_base);
1425 
1426         group_shift = group * 8;
1427         mask = 0xff << group_shift;
1428 
1429         /* Configure evtsel for the region and group */
1430         if (venum_event)
1431                 val = KRAIT_VPMRESR0_GROUP0;
1432         else
1433                 val = krait_get_pmresrn_event(region);
1434         val += group;
1435         /* Mix in mode-exclusion bits */
1436         val |= config_base & (ARMV7_EXCLUDE_USER | ARMV7_EXCLUDE_PL1);
1437         armv7_pmnc_write_evtsel(idx, val);
1438 
1439         if (venum_event) {
1440                 venum_pre_pmresr(&vval, &fval);
1441                 val = venum_read_pmresr();
1442                 val &= ~mask;
1443                 val |= code << group_shift;
1444                 val |= PMRESRn_EN;
1445                 venum_write_pmresr(val);
1446                 venum_post_pmresr(vval, fval);
1447         } else {
1448                 val = krait_read_pmresrn(region);
1449                 val &= ~mask;
1450                 val |= code << group_shift;
1451                 val |= PMRESRn_EN;
1452                 krait_write_pmresrn(region, val);
1453         }
1454 }
1455 
1456 static u32 clear_pmresrn_group(u32 val, int group)
1457 {
1458         u32 mask;
1459         int group_shift;
1460 
1461         group_shift = group * 8;
1462         mask = 0xff << group_shift;
1463         val &= ~mask;
1464 
1465         /* Don't clear enable bit if entire region isn't disabled */
1466         if (val & ~PMRESRn_EN)
1467                 return val |= PMRESRn_EN;
1468 
1469         return 0;
1470 }
1471 
1472 static void krait_clearpmu(u32 config_base)
1473 {
1474         u32 val;
1475         u32 vval, fval;
1476         unsigned int region = EVENT_REGION(config_base);
1477         unsigned int group = EVENT_GROUP(config_base);
1478         bool venum_event = EVENT_VENUM(config_base);
1479 
1480         if (venum_event) {
1481                 venum_pre_pmresr(&vval, &fval);
1482                 val = venum_read_pmresr();
1483                 val = clear_pmresrn_group(val, group);
1484                 venum_write_pmresr(val);
1485                 venum_post_pmresr(vval, fval);
1486         } else {
1487                 val = krait_read_pmresrn(region);
1488                 val = clear_pmresrn_group(val, group);
1489                 krait_write_pmresrn(region, val);
1490         }
1491 }
1492 
1493 static void krait_pmu_disable_event(struct perf_event *event)
1494 {
1495         unsigned long flags;
1496         struct hw_perf_event *hwc = &event->hw;
1497         int idx = hwc->idx;
1498         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
1499         struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
1500 
1501         /* Disable counter and interrupt */
1502         raw_spin_lock_irqsave(&events->pmu_lock, flags);
1503 
1504         /* Disable counter */
1505         armv7_pmnc_disable_counter(idx);
1506 
1507         /*
1508          * Clear pmresr code (if destined for PMNx counters)
1509          */
1510         if (hwc->config_base & KRAIT_EVENT_MASK)
1511                 krait_clearpmu(hwc->config_base);
1512 
1513         /* Disable interrupt for this counter */
1514         armv7_pmnc_disable_intens(idx);
1515 
1516         raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
1517 }
1518 
1519 static void krait_pmu_enable_event(struct perf_event *event)
1520 {
1521         unsigned long flags;
1522         struct hw_perf_event *hwc = &event->hw;
1523         int idx = hwc->idx;
1524         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
1525         struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
1526 
1527         /*
1528          * Enable counter and interrupt, and set the counter to count
1529          * the event that we're interested in.
1530          */
1531         raw_spin_lock_irqsave(&events->pmu_lock, flags);
1532 
1533         /* Disable counter */
1534         armv7_pmnc_disable_counter(idx);
1535 
1536         /*
1537          * Set event (if destined for PMNx counters)
1538          * We set the event for the cycle counter because we
1539          * have the ability to perform event filtering.
1540          */
1541         if (hwc->config_base & KRAIT_EVENT_MASK)
1542                 krait_evt_setup(idx, hwc->config_base);
1543         else
1544                 armv7_pmnc_write_evtsel(idx, hwc->config_base);
1545 
1546         /* Enable interrupt for this counter */
1547         armv7_pmnc_enable_intens(idx);
1548 
1549         /* Enable counter */
1550         armv7_pmnc_enable_counter(idx);
1551 
1552         raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
1553 }
1554 
1555 static void krait_pmu_reset(void *info)
1556 {
1557         u32 vval, fval;
1558         struct arm_pmu *cpu_pmu = info;
1559         u32 idx, nb_cnt = cpu_pmu->num_events;
1560 
1561         armv7pmu_reset(info);
1562 
1563         /* Clear all pmresrs */
1564         krait_write_pmresrn(0, 0);
1565         krait_write_pmresrn(1, 0);
1566         krait_write_pmresrn(2, 0);
1567 
1568         venum_pre_pmresr(&vval, &fval);
1569         venum_write_pmresr(0);
1570         venum_post_pmresr(vval, fval);
1571 
1572         /* Reset PMxEVNCTCR to sane default */
1573         for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) {
1574                 armv7_pmnc_select_counter(idx);
1575                 asm volatile("mcr p15, 0, %0, c9, c15, 0" : : "r" (0));
1576         }
1577 
1578 }
1579 
1580 static int krait_event_to_bit(struct perf_event *event, unsigned int region,
1581                               unsigned int group)
1582 {
1583         int bit;
1584         struct hw_perf_event *hwc = &event->hw;
1585         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
1586 
1587         if (hwc->config_base & VENUM_EVENT)
1588                 bit = KRAIT_VPMRESR0_GROUP0;
1589         else
1590                 bit = krait_get_pmresrn_event(region);
1591         bit -= krait_get_pmresrn_event(0);
1592         bit += group;
1593         /*
1594          * Lower bits are reserved for use by the counters (see
1595          * armv7pmu_get_event_idx() for more info)
1596          */
1597         bit += ARMV7_IDX_COUNTER_LAST(cpu_pmu) + 1;
1598 
1599         return bit;
1600 }
1601 
1602 /*
1603  * We check for column exclusion constraints here.
1604  * Two events cant use the same group within a pmresr register.
1605  */
1606 static int krait_pmu_get_event_idx(struct pmu_hw_events *cpuc,
1607                                    struct perf_event *event)
1608 {
1609         int idx;
1610         int bit = -1;
1611         struct hw_perf_event *hwc = &event->hw;
1612         unsigned int region = EVENT_REGION(hwc->config_base);
1613         unsigned int code = EVENT_CODE(hwc->config_base);
1614         unsigned int group = EVENT_GROUP(hwc->config_base);
1615         bool venum_event = EVENT_VENUM(hwc->config_base);
1616         bool krait_event = EVENT_CPU(hwc->config_base);
1617 
1618         if (venum_event || krait_event) {
1619                 /* Ignore invalid events */
1620                 if (group > 3 || region > 2)
1621                         return -EINVAL;
1622                 if (venum_event && (code & 0xe0))
1623                         return -EINVAL;
1624 
1625                 bit = krait_event_to_bit(event, region, group);
1626                 if (test_and_set_bit(bit, cpuc->used_mask))
1627                         return -EAGAIN;
1628         }
1629 
1630         idx = armv7pmu_get_event_idx(cpuc, event);
1631         if (idx < 0 && bit >= 0)
1632                 clear_bit(bit, cpuc->used_mask);
1633 
1634         return idx;
1635 }
1636 
1637 static void krait_pmu_clear_event_idx(struct pmu_hw_events *cpuc,
1638                                       struct perf_event *event)
1639 {
1640         int bit;
1641         struct hw_perf_event *hwc = &event->hw;
1642         unsigned int region = EVENT_REGION(hwc->config_base);
1643         unsigned int group = EVENT_GROUP(hwc->config_base);
1644         bool venum_event = EVENT_VENUM(hwc->config_base);
1645         bool krait_event = EVENT_CPU(hwc->config_base);
1646 
1647         armv7pmu_clear_event_idx(cpuc, event);
1648         if (venum_event || krait_event) {
1649                 bit = krait_event_to_bit(event, region, group);
1650                 clear_bit(bit, cpuc->used_mask);
1651         }
1652 }
1653 
1654 static int krait_pmu_init(struct arm_pmu *cpu_pmu)
1655 {
1656         armv7pmu_init(cpu_pmu);
1657         cpu_pmu->name           = "armv7_krait";
1658         /* Some early versions of Krait don't support PC write events */
1659         if (of_property_read_bool(cpu_pmu->plat_device->dev.of_node,
1660                                   "qcom,no-pc-write"))
1661                 cpu_pmu->map_event = krait_map_event_no_branch;
1662         else
1663                 cpu_pmu->map_event = krait_map_event;
1664         cpu_pmu->set_event_filter = armv7pmu_set_event_filter;
1665         cpu_pmu->reset          = krait_pmu_reset;
1666         cpu_pmu->enable         = krait_pmu_enable_event;
1667         cpu_pmu->disable        = krait_pmu_disable_event;
1668         cpu_pmu->get_event_idx  = krait_pmu_get_event_idx;
1669         cpu_pmu->clear_event_idx = krait_pmu_clear_event_idx;
1670         return armv7_probe_num_events(cpu_pmu);
1671 }
1672 
1673 /*
1674  * Scorpion Local Performance Monitor Register (LPMn)
1675  *
1676  *            31   30     24     16     8      0
1677  *            +--------------------------------+
1678  *  LPM0      | EN |  CC  |  CC  |  CC  |  CC  |   N = 1, R = 0
1679  *            +--------------------------------+
1680  *  LPM1      | EN |  CC  |  CC  |  CC  |  CC  |   N = 1, R = 1
1681  *            +--------------------------------+
1682  *  LPM2      | EN |  CC  |  CC  |  CC  |  CC  |   N = 1, R = 2
1683  *            +--------------------------------+
1684  *  L2LPM     | EN |  CC  |  CC  |  CC  |  CC  |   N = 1, R = 3
1685  *            +--------------------------------+
1686  *  VLPM      | EN |  CC  |  CC  |  CC  |  CC  |   N = 2, R = ?
1687  *            +--------------------------------+
1688  *              EN | G=3  | G=2  | G=1  | G=0
1689  *
1690  *
1691  *  Event Encoding:
1692  *
1693  *      hwc->config_base = 0xNRCCG
1694  *
1695  *      N  = prefix, 1 for Scorpion CPU (LPMn/L2LPM), 2 for Venum VFP (VLPM)
1696  *      R  = region register
1697  *      CC = class of events the group G is choosing from
1698  *      G  = group or particular event
1699  *
1700  *  Example: 0x12021 is a Scorpion CPU event in LPM2's group 1 with code 2
1701  *
1702  *  A region (R) corresponds to a piece of the CPU (execution unit, instruction
1703  *  unit, etc.) while the event code (CC) corresponds to a particular class of
1704  *  events (interrupts for example). An event code is broken down into
1705  *  groups (G) that can be mapped into the PMU (irq, fiqs, and irq+fiqs for
1706  *  example).
1707  */
1708 
1709 static u32 scorpion_read_pmresrn(int n)
1710 {
1711         u32 val;
1712 
1713         switch (n) {
1714         case 0:
1715                 asm volatile("mrc p15, 0, %0, c15, c0, 0" : "=r" (val));
1716                 break;
1717         case 1:
1718                 asm volatile("mrc p15, 1, %0, c15, c0, 0" : "=r" (val));
1719                 break;
1720         case 2:
1721                 asm volatile("mrc p15, 2, %0, c15, c0, 0" : "=r" (val));
1722                 break;
1723         case 3:
1724                 asm volatile("mrc p15, 3, %0, c15, c2, 0" : "=r" (val));
1725                 break;
1726         default:
1727                 BUG(); /* Should be validated in scorpion_pmu_get_event_idx() */
1728         }
1729 
1730         return val;
1731 }
1732 
1733 static void scorpion_write_pmresrn(int n, u32 val)
1734 {
1735         switch (n) {
1736         case 0:
1737                 asm volatile("mcr p15, 0, %0, c15, c0, 0" : : "r" (val));
1738                 break;
1739         case 1:
1740                 asm volatile("mcr p15, 1, %0, c15, c0, 0" : : "r" (val));
1741                 break;
1742         case 2:
1743                 asm volatile("mcr p15, 2, %0, c15, c0, 0" : : "r" (val));
1744                 break;
1745         case 3:
1746                 asm volatile("mcr p15, 3, %0, c15, c2, 0" : : "r" (val));
1747                 break;
1748         default:
1749                 BUG(); /* Should be validated in scorpion_pmu_get_event_idx() */
1750         }
1751 }
1752 
1753 static u32 scorpion_get_pmresrn_event(unsigned int region)
1754 {
1755         static const u32 pmresrn_table[] = { SCORPION_LPM0_GROUP0,
1756                                              SCORPION_LPM1_GROUP0,
1757                                              SCORPION_LPM2_GROUP0,
1758                                              SCORPION_L2LPM_GROUP0 };
1759         return pmresrn_table[region];
1760 }
1761 
1762 static void scorpion_evt_setup(int idx, u32 config_base)
1763 {
1764         u32 val;
1765         u32 mask;
1766         u32 vval, fval;
1767         unsigned int region = EVENT_REGION(config_base);
1768         unsigned int group = EVENT_GROUP(config_base);
1769         unsigned int code = EVENT_CODE(config_base);
1770         unsigned int group_shift;
1771         bool venum_event = EVENT_VENUM(config_base);
1772 
1773         group_shift = group * 8;
1774         mask = 0xff << group_shift;
1775 
1776         /* Configure evtsel for the region and group */
1777         if (venum_event)
1778                 val = SCORPION_VLPM_GROUP0;
1779         else
1780                 val = scorpion_get_pmresrn_event(region);
1781         val += group;
1782         /* Mix in mode-exclusion bits */
1783         val |= config_base & (ARMV7_EXCLUDE_USER | ARMV7_EXCLUDE_PL1);
1784         armv7_pmnc_write_evtsel(idx, val);
1785 
1786         asm volatile("mcr p15, 0, %0, c9, c15, 0" : : "r" (0));
1787 
1788         if (venum_event) {
1789                 venum_pre_pmresr(&vval, &fval);
1790                 val = venum_read_pmresr();
1791                 val &= ~mask;
1792                 val |= code << group_shift;
1793                 val |= PMRESRn_EN;
1794                 venum_write_pmresr(val);
1795                 venum_post_pmresr(vval, fval);
1796         } else {
1797                 val = scorpion_read_pmresrn(region);
1798                 val &= ~mask;
1799                 val |= code << group_shift;
1800                 val |= PMRESRn_EN;
1801                 scorpion_write_pmresrn(region, val);
1802         }
1803 }
1804 
1805 static void scorpion_clearpmu(u32 config_base)
1806 {
1807         u32 val;
1808         u32 vval, fval;
1809         unsigned int region = EVENT_REGION(config_base);
1810         unsigned int group = EVENT_GROUP(config_base);
1811         bool venum_event = EVENT_VENUM(config_base);
1812 
1813         if (venum_event) {
1814                 venum_pre_pmresr(&vval, &fval);
1815                 val = venum_read_pmresr();
1816                 val = clear_pmresrn_group(val, group);
1817                 venum_write_pmresr(val);
1818                 venum_post_pmresr(vval, fval);
1819         } else {
1820                 val = scorpion_read_pmresrn(region);
1821                 val = clear_pmresrn_group(val, group);
1822                 scorpion_write_pmresrn(region, val);
1823         }
1824 }
1825 
1826 static void scorpion_pmu_disable_event(struct perf_event *event)
1827 {
1828         unsigned long flags;
1829         struct hw_perf_event *hwc = &event->hw;
1830         int idx = hwc->idx;
1831         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
1832         struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
1833 
1834         /* Disable counter and interrupt */
1835         raw_spin_lock_irqsave(&events->pmu_lock, flags);
1836 
1837         /* Disable counter */
1838         armv7_pmnc_disable_counter(idx);
1839 
1840         /*
1841          * Clear pmresr code (if destined for PMNx counters)
1842          */
1843         if (hwc->config_base & KRAIT_EVENT_MASK)
1844                 scorpion_clearpmu(hwc->config_base);
1845 
1846         /* Disable interrupt for this counter */
1847         armv7_pmnc_disable_intens(idx);
1848 
1849         raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
1850 }
1851 
1852 static void scorpion_pmu_enable_event(struct perf_event *event)
1853 {
1854         unsigned long flags;
1855         struct hw_perf_event *hwc = &event->hw;
1856         int idx = hwc->idx;
1857         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
1858         struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
1859 
1860         /*
1861          * Enable counter and interrupt, and set the counter to count
1862          * the event that we're interested in.
1863          */
1864         raw_spin_lock_irqsave(&events->pmu_lock, flags);
1865 
1866         /* Disable counter */
1867         armv7_pmnc_disable_counter(idx);
1868 
1869         /*
1870          * Set event (if destined for PMNx counters)
1871          * We don't set the event for the cycle counter because we
1872          * don't have the ability to perform event filtering.
1873          */
1874         if (hwc->config_base & KRAIT_EVENT_MASK)
1875                 scorpion_evt_setup(idx, hwc->config_base);
1876         else if (idx != ARMV7_IDX_CYCLE_COUNTER)
1877                 armv7_pmnc_write_evtsel(idx, hwc->config_base);
1878 
1879         /* Enable interrupt for this counter */
1880         armv7_pmnc_enable_intens(idx);
1881 
1882         /* Enable counter */
1883         armv7_pmnc_enable_counter(idx);
1884 
1885         raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
1886 }
1887 
1888 static void scorpion_pmu_reset(void *info)
1889 {
1890         u32 vval, fval;
1891         struct arm_pmu *cpu_pmu = info;
1892         u32 idx, nb_cnt = cpu_pmu->num_events;
1893 
1894         armv7pmu_reset(info);
1895 
1896         /* Clear all pmresrs */
1897         scorpion_write_pmresrn(0, 0);
1898         scorpion_write_pmresrn(1, 0);
1899         scorpion_write_pmresrn(2, 0);
1900         scorpion_write_pmresrn(3, 0);
1901 
1902         venum_pre_pmresr(&vval, &fval);
1903         venum_write_pmresr(0);
1904         venum_post_pmresr(vval, fval);
1905 
1906         /* Reset PMxEVNCTCR to sane default */
1907         for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) {
1908                 armv7_pmnc_select_counter(idx);
1909                 asm volatile("mcr p15, 0, %0, c9, c15, 0" : : "r" (0));
1910         }
1911 }
1912 
1913 static int scorpion_event_to_bit(struct perf_event *event, unsigned int region,
1914                               unsigned int group)
1915 {
1916         int bit;
1917         struct hw_perf_event *hwc = &event->hw;
1918         struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
1919 
1920         if (hwc->config_base & VENUM_EVENT)
1921                 bit = SCORPION_VLPM_GROUP0;
1922         else
1923                 bit = scorpion_get_pmresrn_event(region);
1924         bit -= scorpion_get_pmresrn_event(0);
1925         bit += group;
1926         /*
1927          * Lower bits are reserved for use by the counters (see
1928          * armv7pmu_get_event_idx() for more info)
1929          */
1930         bit += ARMV7_IDX_COUNTER_LAST(cpu_pmu) + 1;
1931 
1932         return bit;
1933 }
1934 
1935 /*
1936  * We check for column exclusion constraints here.
1937  * Two events cant use the same group within a pmresr register.
1938  */
1939 static int scorpion_pmu_get_event_idx(struct pmu_hw_events *cpuc,
1940                                    struct perf_event *event)
1941 {
1942         int idx;
1943         int bit = -1;
1944         struct hw_perf_event *hwc = &event->hw;
1945         unsigned int region = EVENT_REGION(hwc->config_base);
1946         unsigned int group = EVENT_GROUP(hwc->config_base);
1947         bool venum_event = EVENT_VENUM(hwc->config_base);
1948         bool scorpion_event = EVENT_CPU(hwc->config_base);
1949 
1950         if (venum_event || scorpion_event) {
1951                 /* Ignore invalid events */
1952                 if (group > 3 || region > 3)
1953                         return -EINVAL;
1954 
1955                 bit = scorpion_event_to_bit(event, region, group);
1956                 if (test_and_set_bit(bit, cpuc->used_mask))
1957                         return -EAGAIN;
1958         }
1959 
1960         idx = armv7pmu_get_event_idx(cpuc, event);
1961         if (idx < 0 && bit >= 0)
1962                 clear_bit(bit, cpuc->used_mask);
1963 
1964         return idx;
1965 }
1966 
1967 static void scorpion_pmu_clear_event_idx(struct pmu_hw_events *cpuc,
1968                                       struct perf_event *event)
1969 {
1970         int bit;
1971         struct hw_perf_event *hwc = &event->hw;
1972         unsigned int region = EVENT_REGION(hwc->config_base);
1973         unsigned int group = EVENT_GROUP(hwc->config_base);
1974         bool venum_event = EVENT_VENUM(hwc->config_base);
1975         bool scorpion_event = EVENT_CPU(hwc->config_base);
1976 
1977         armv7pmu_clear_event_idx(cpuc, event);
1978         if (venum_event || scorpion_event) {
1979                 bit = scorpion_event_to_bit(event, region, group);
1980                 clear_bit(bit, cpuc->used_mask);
1981         }
1982 }
1983 
1984 static int scorpion_pmu_init(struct arm_pmu *cpu_pmu)
1985 {
1986         armv7pmu_init(cpu_pmu);
1987         cpu_pmu->name           = "armv7_scorpion";
1988         cpu_pmu->map_event      = scorpion_map_event;
1989         cpu_pmu->reset          = scorpion_pmu_reset;
1990         cpu_pmu->enable         = scorpion_pmu_enable_event;
1991         cpu_pmu->disable        = scorpion_pmu_disable_event;
1992         cpu_pmu->get_event_idx  = scorpion_pmu_get_event_idx;
1993         cpu_pmu->clear_event_idx = scorpion_pmu_clear_event_idx;
1994         return armv7_probe_num_events(cpu_pmu);
1995 }
1996 
1997 static int scorpion_mp_pmu_init(struct arm_pmu *cpu_pmu)
1998 {
1999         armv7pmu_init(cpu_pmu);
2000         cpu_pmu->name           = "armv7_scorpion_mp";
2001         cpu_pmu->map_event      = scorpion_map_event;
2002         cpu_pmu->reset          = scorpion_pmu_reset;
2003         cpu_pmu->enable         = scorpion_pmu_enable_event;
2004         cpu_pmu->disable        = scorpion_pmu_disable_event;
2005         cpu_pmu->get_event_idx  = scorpion_pmu_get_event_idx;
2006         cpu_pmu->clear_event_idx = scorpion_pmu_clear_event_idx;
2007         return armv7_probe_num_events(cpu_pmu);
2008 }
2009 
2010 static const struct of_device_id armv7_pmu_of_device_ids[] = {
2011         {.compatible = "arm,cortex-a17-pmu",    .data = armv7_a17_pmu_init},
2012         {.compatible = "arm,cortex-a15-pmu",    .data = armv7_a15_pmu_init},
2013         {.compatible = "arm,cortex-a12-pmu",    .data = armv7_a12_pmu_init},
2014         {.compatible = "arm,cortex-a9-pmu",     .data = armv7_a9_pmu_init},
2015         {.compatible = "arm,cortex-a8-pmu",     .data = armv7_a8_pmu_init},
2016         {.compatible = "arm,cortex-a7-pmu",     .data = armv7_a7_pmu_init},
2017         {.compatible = "arm,cortex-a5-pmu",     .data = armv7_a5_pmu_init},
2018         {.compatible = "qcom,krait-pmu",        .data = krait_pmu_init},
2019         {.compatible = "qcom,scorpion-pmu",     .data = scorpion_pmu_init},
2020         {.compatible = "qcom,scorpion-mp-pmu",  .data = scorpion_mp_pmu_init},
2021         {},
2022 };
2023 
2024 static const struct pmu_probe_info armv7_pmu_probe_table[] = {
2025         ARM_PMU_PROBE(ARM_CPU_PART_CORTEX_A8, armv7_a8_pmu_init),
2026         ARM_PMU_PROBE(ARM_CPU_PART_CORTEX_A9, armv7_a9_pmu_init),
2027         { /* sentinel value */ }
2028 };
2029 
2030 
2031 static int armv7_pmu_device_probe(struct platform_device *pdev)
2032 {
2033         return arm_pmu_device_probe(pdev, armv7_pmu_of_device_ids,
2034                                     armv7_pmu_probe_table);
2035 }
2036 
2037 static struct platform_driver armv7_pmu_driver = {
2038         .driver         = {
2039                 .name   = "armv7-pmu",
2040                 .of_match_table = armv7_pmu_of_device_ids,
2041                 .suppress_bind_attrs = true,
2042         },
2043         .probe          = armv7_pmu_device_probe,
2044 };
2045 
2046 builtin_platform_driver(armv7_pmu_driver);
2047 #endif  /* CONFIG_CPU_V7 */
/* [<][>][^][v][top][bottom][index][help] */
root/arch/arm/kernel/perf_event_v7.c

DEFINITIONS
