/* * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code. * * ARMv7 support: Jean Pihet * 2010 (c) MontaVista Software, LLC. * * Copied from ARMv6 code, with the low level code inspired * by the ARMv7 Oprofile code. * * Cortex-A8 has up to 4 configurable performance counters and * a single cycle counter. * Cortex-A9 has up to 31 configurable performance counters and * a single cycle counter. * * All counters can be enabled/disabled and IRQ masked separately. The cycle * counter and all 4 performance counters together can be reset separately. */ #ifdef CONFIG_CPU_V7 #include #include #include "../vfp/vfpinstr.h" /* * Common ARMv7 event types * * Note: An implementation may not be able to count all of these events * but the encodings are considered to be `reserved' in the case that * they are not available. */ enum armv7_perf_types { ARMV7_PERFCTR_PMNC_SW_INCR = 0x00, ARMV7_PERFCTR_L1_ICACHE_REFILL = 0x01, ARMV7_PERFCTR_ITLB_REFILL = 0x02, ARMV7_PERFCTR_L1_DCACHE_REFILL = 0x03, ARMV7_PERFCTR_L1_DCACHE_ACCESS = 0x04, ARMV7_PERFCTR_DTLB_REFILL = 0x05, ARMV7_PERFCTR_MEM_READ = 0x06, ARMV7_PERFCTR_MEM_WRITE = 0x07, ARMV7_PERFCTR_INSTR_EXECUTED = 0x08, ARMV7_PERFCTR_EXC_TAKEN = 0x09, ARMV7_PERFCTR_EXC_EXECUTED = 0x0A, ARMV7_PERFCTR_CID_WRITE = 0x0B, /* * ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS. * It counts: * - all (taken) branch instructions, * - instructions that explicitly write the PC, * - exception generating instructions. */ ARMV7_PERFCTR_PC_WRITE = 0x0C, ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D, ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E, ARMV7_PERFCTR_MEM_UNALIGNED_ACCESS = 0x0F, ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10, ARMV7_PERFCTR_CLOCK_CYCLES = 0x11, ARMV7_PERFCTR_PC_BRANCH_PRED = 0x12, /* These events are defined by the PMUv2 supplement (ARM DDI 0457A). */ ARMV7_PERFCTR_MEM_ACCESS = 0x13, ARMV7_PERFCTR_L1_ICACHE_ACCESS = 0x14, ARMV7_PERFCTR_L1_DCACHE_WB = 0x15, ARMV7_PERFCTR_L2_CACHE_ACCESS = 0x16, ARMV7_PERFCTR_L2_CACHE_REFILL = 0x17, ARMV7_PERFCTR_L2_CACHE_WB = 0x18, ARMV7_PERFCTR_BUS_ACCESS = 0x19, ARMV7_PERFCTR_MEM_ERROR = 0x1A, ARMV7_PERFCTR_INSTR_SPEC = 0x1B, ARMV7_PERFCTR_TTBR_WRITE = 0x1C, ARMV7_PERFCTR_BUS_CYCLES = 0x1D, ARMV7_PERFCTR_CPU_CYCLES = 0xFF }; /* ARMv7 Cortex-A8 specific event types */ enum armv7_a8_perf_types { ARMV7_A8_PERFCTR_L2_CACHE_ACCESS = 0x43, ARMV7_A8_PERFCTR_L2_CACHE_REFILL = 0x44, ARMV7_A8_PERFCTR_L1_ICACHE_ACCESS = 0x50, ARMV7_A8_PERFCTR_STALL_ISIDE = 0x56, }; /* ARMv7 Cortex-A9 specific event types */ enum armv7_a9_perf_types { ARMV7_A9_PERFCTR_INSTR_CORE_RENAME = 0x68, ARMV7_A9_PERFCTR_STALL_ICACHE = 0x60, ARMV7_A9_PERFCTR_STALL_DISPATCH = 0x66, }; /* ARMv7 Cortex-A5 specific event types */ enum armv7_a5_perf_types { ARMV7_A5_PERFCTR_PREFETCH_LINEFILL = 0xc2, ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP = 0xc3, }; /* ARMv7 Cortex-A15 specific event types */ enum armv7_a15_perf_types { ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_READ = 0x40, ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_WRITE = 0x41, ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_READ = 0x42, ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_WRITE = 0x43, ARMV7_A15_PERFCTR_DTLB_REFILL_L1_READ = 0x4C, ARMV7_A15_PERFCTR_DTLB_REFILL_L1_WRITE = 0x4D, ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_READ = 0x50, ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_WRITE = 0x51, ARMV7_A15_PERFCTR_L2_CACHE_REFILL_READ = 0x52, ARMV7_A15_PERFCTR_L2_CACHE_REFILL_WRITE = 0x53, ARMV7_A15_PERFCTR_PC_WRITE_SPEC = 0x76, }; /* ARMv7 Cortex-A12 specific event types */ enum armv7_a12_perf_types { ARMV7_A12_PERFCTR_L1_DCACHE_ACCESS_READ = 0x40, ARMV7_A12_PERFCTR_L1_DCACHE_ACCESS_WRITE = 0x41, ARMV7_A12_PERFCTR_L2_CACHE_ACCESS_READ = 0x50, ARMV7_A12_PERFCTR_L2_CACHE_ACCESS_WRITE = 0x51, ARMV7_A12_PERFCTR_PC_WRITE_SPEC = 0x76, ARMV7_A12_PERFCTR_PF_TLB_REFILL = 0xe7, }; /* ARMv7 Krait specific event types */ enum krait_perf_types { KRAIT_PMRESR0_GROUP0 = 0xcc, KRAIT_PMRESR1_GROUP0 = 0xd0, KRAIT_PMRESR2_GROUP0 = 0xd4, KRAIT_VPMRESR0_GROUP0 = 0xd8, KRAIT_PERFCTR_L1_ICACHE_ACCESS = 0x10011, KRAIT_PERFCTR_L1_ICACHE_MISS = 0x10010, KRAIT_PERFCTR_L1_ITLB_ACCESS = 0x12222, KRAIT_PERFCTR_L1_DTLB_ACCESS = 0x12210, }; /* * Cortex-A8 HW events mapping * * The hardware events that we support. We do support cache operations but * we have harvard caches and no way to combine instruction and data * accesses/misses in hardware. */ static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = { PERF_MAP_ALL_UNSUPPORTED, [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV7_A8_PERFCTR_STALL_ISIDE, }; static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] [PERF_COUNT_HW_CACHE_OP_MAX] [PERF_COUNT_HW_CACHE_RESULT_MAX] = { PERF_CACHE_MAP_ALL_UNSUPPORTED, /* * The performance counters don't differentiate between read and write * accesses/misses so this isn't strictly correct, but it's the best we * can do. Writes and reads get combined. */ [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L1_ICACHE_ACCESS, [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, [C(LL)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L2_CACHE_ACCESS, [C(LL)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_A8_PERFCTR_L2_CACHE_REFILL, [C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L2_CACHE_ACCESS, [C(LL)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_A8_PERFCTR_L2_CACHE_REFILL, [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, }; /* * Cortex-A9 HW events mapping */ static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = { PERF_MAP_ALL_UNSUPPORTED, [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_A9_PERFCTR_INSTR_CORE_RENAME, [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV7_A9_PERFCTR_STALL_ICACHE, [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = ARMV7_A9_PERFCTR_STALL_DISPATCH, }; static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] [PERF_COUNT_HW_CACHE_OP_MAX] [PERF_COUNT_HW_CACHE_RESULT_MAX] = { PERF_CACHE_MAP_ALL_UNSUPPORTED, /* * The performance counters don't differentiate between read and write * accesses/misses so this isn't strictly correct, but it's the best we * can do. Writes and reads get combined. */ [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, }; /* * Cortex-A5 HW events mapping */ static const unsigned armv7_a5_perf_map[PERF_COUNT_HW_MAX] = { PERF_MAP_ALL_UNSUPPORTED, [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, }; static const unsigned armv7_a5_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] [PERF_COUNT_HW_CACHE_OP_MAX] [PERF_COUNT_HW_CACHE_RESULT_MAX] = { PERF_CACHE_MAP_ALL_UNSUPPORTED, [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1D)][C(OP_PREFETCH)][C(RESULT_ACCESS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL, [C(L1D)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP, [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, /* * The prefetch counters don't differentiate between the I side and the * D side. */ [C(L1I)][C(OP_PREFETCH)][C(RESULT_ACCESS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL, [C(L1I)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP, [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, }; /* * Cortex-A15 HW events mapping */ static const unsigned armv7_a15_perf_map[PERF_COUNT_HW_MAX] = { PERF_MAP_ALL_UNSUPPORTED, [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_A15_PERFCTR_PC_WRITE_SPEC, [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_BUS_CYCLES, }; static const unsigned armv7_a15_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] [PERF_COUNT_HW_CACHE_OP_MAX] [PERF_COUNT_HW_CACHE_RESULT_MAX] = { PERF_CACHE_MAP_ALL_UNSUPPORTED, [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_READ, [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_READ, [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_WRITE, [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_WRITE, /* * Not all performance counters differentiate between read and write * accesses/misses so we're not always strictly correct, but it's the * best we can do. Writes and reads get combined in these cases. */ [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, [C(LL)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_READ, [C(LL)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L2_CACHE_REFILL_READ, [C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_WRITE, [C(LL)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L2_CACHE_REFILL_WRITE, [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_A15_PERFCTR_DTLB_REFILL_L1_READ, [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_A15_PERFCTR_DTLB_REFILL_L1_WRITE, [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, }; /* * Cortex-A7 HW events mapping */ static const unsigned armv7_a7_perf_map[PERF_COUNT_HW_MAX] = { PERF_MAP_ALL_UNSUPPORTED, [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_BUS_CYCLES, }; static const unsigned armv7_a7_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] [PERF_COUNT_HW_CACHE_OP_MAX] [PERF_COUNT_HW_CACHE_RESULT_MAX] = { PERF_CACHE_MAP_ALL_UNSUPPORTED, /* * The performance counters don't differentiate between read and write * accesses/misses so this isn't strictly correct, but it's the best we * can do. Writes and reads get combined. */ [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, [C(LL)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_CACHE_ACCESS, [C(LL)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACHE_REFILL, [C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_CACHE_ACCESS, [C(LL)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACHE_REFILL, [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, }; /* * Cortex-A12 HW events mapping */ static const unsigned armv7_a12_perf_map[PERF_COUNT_HW_MAX] = { PERF_MAP_ALL_UNSUPPORTED, [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_A12_PERFCTR_PC_WRITE_SPEC, [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_BUS_CYCLES, }; static const unsigned armv7_a12_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] [PERF_COUNT_HW_CACHE_OP_MAX] [PERF_COUNT_HW_CACHE_RESULT_MAX] = { PERF_CACHE_MAP_ALL_UNSUPPORTED, [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_A12_PERFCTR_L1_DCACHE_ACCESS_READ, [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_A12_PERFCTR_L1_DCACHE_ACCESS_WRITE, [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, /* * Not all performance counters differentiate between read and write * accesses/misses so we're not always strictly correct, but it's the * best we can do. Writes and reads get combined in these cases. */ [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, [C(LL)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_A12_PERFCTR_L2_CACHE_ACCESS_READ, [C(LL)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACHE_REFILL, [C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_A12_PERFCTR_L2_CACHE_ACCESS_WRITE, [C(LL)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACHE_REFILL, [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, [C(DTLB)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV7_A12_PERFCTR_PF_TLB_REFILL, [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, }; /* * Krait HW events mapping */ static const unsigned krait_perf_map[PERF_COUNT_HW_MAX] = { PERF_MAP_ALL_UNSUPPORTED, [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, }; static const unsigned krait_perf_map_no_branch[PERF_COUNT_HW_MAX] = { PERF_MAP_ALL_UNSUPPORTED, [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, }; static const unsigned krait_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] [PERF_COUNT_HW_CACHE_OP_MAX] [PERF_COUNT_HW_CACHE_RESULT_MAX] = { PERF_CACHE_MAP_ALL_UNSUPPORTED, /* * The performance counters don't differentiate between read and write * accesses/misses so this isn't strictly correct, but it's the best we * can do. Writes and reads get combined. */ [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = KRAIT_PERFCTR_L1_ICACHE_ACCESS, [C(L1I)][C(OP_READ)][C(RESULT_MISS)] = KRAIT_PERFCTR_L1_ICACHE_MISS, [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = KRAIT_PERFCTR_L1_DTLB_ACCESS, [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = KRAIT_PERFCTR_L1_DTLB_ACCESS, [C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = KRAIT_PERFCTR_L1_ITLB_ACCESS, [C(ITLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = KRAIT_PERFCTR_L1_ITLB_ACCESS, [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, }; /* * Perf Events' indices */ #define ARMV7_IDX_CYCLE_COUNTER 0 #define ARMV7_IDX_COUNTER0 1 #define ARMV7_IDX_COUNTER_LAST(cpu_pmu) \ (ARMV7_IDX_CYCLE_COUNTER + cpu_pmu->num_events - 1) #define ARMV7_MAX_COUNTERS 32 #define ARMV7_COUNTER_MASK (ARMV7_MAX_COUNTERS - 1) /* * ARMv7 low level PMNC access */ /* * Perf Event to low level counters mapping */ #define ARMV7_IDX_TO_COUNTER(x) \ (((x) - ARMV7_IDX_COUNTER0) & ARMV7_COUNTER_MASK) /* * Per-CPU PMNC: config reg */ #define ARMV7_PMNC_E (1 << 0) /* Enable all counters */ #define ARMV7_PMNC_P (1 << 1) /* Reset all counters */ #define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */ #define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */ #define ARMV7_PMNC_X (1 << 4) /* Export to ETM */ #define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/ #define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */ #define ARMV7_PMNC_N_MASK 0x1f #define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */ /* * FLAG: counters overflow flag status reg */ #define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */ #define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK /* * PMXEVTYPER: Event selection reg */ #define ARMV7_EVTYPE_MASK 0xc80000ff /* Mask for writable bits */ #define ARMV7_EVTYPE_EVENT 0xff /* Mask for EVENT bits */ /* * Event filters for PMUv2 */ #define ARMV7_EXCLUDE_PL1 (1 << 31) #define ARMV7_EXCLUDE_USER (1 << 30) #define ARMV7_INCLUDE_HYP (1 << 27) static inline u32 armv7_pmnc_read(void) { u32 val; asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val)); return val; } static inline void armv7_pmnc_write(u32 val) { val &= ARMV7_PMNC_MASK; isb(); asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val)); } static inline int armv7_pmnc_has_overflowed(u32 pmnc) { return pmnc & ARMV7_OVERFLOWED_MASK; } static inline int armv7_pmnc_counter_valid(struct arm_pmu *cpu_pmu, int idx) { return idx >= ARMV7_IDX_CYCLE_COUNTER && idx <= ARMV7_IDX_COUNTER_LAST(cpu_pmu); } static inline int armv7_pmnc_counter_has_overflowed(u32 pmnc, int idx) { return pmnc & BIT(ARMV7_IDX_TO_COUNTER(idx)); } static inline int armv7_pmnc_select_counter(int idx) { u32 counter = ARMV7_IDX_TO_COUNTER(idx); asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (counter)); isb(); return idx; } static inline u32 armv7pmu_read_counter(struct perf_event *event) { struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); struct hw_perf_event *hwc = &event->hw; int idx = hwc->idx; u32 value = 0; if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) pr_err("CPU%u reading wrong counter %d\n", smp_processor_id(), idx); else if (idx == ARMV7_IDX_CYCLE_COUNTER) asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value)); else if (armv7_pmnc_select_counter(idx) == idx) asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (value)); return value; } static inline void armv7pmu_write_counter(struct perf_event *event, u32 value) { struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); struct hw_perf_event *hwc = &event->hw; int idx = hwc->idx; if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) pr_err("CPU%u writing wrong counter %d\n", smp_processor_id(), idx); else if (idx == ARMV7_IDX_CYCLE_COUNTER) asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value)); else if (armv7_pmnc_select_counter(idx) == idx) asm volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" (value)); } static inline void armv7_pmnc_write_evtsel(int idx, u32 val) { if (armv7_pmnc_select_counter(idx) == idx) { val &= ARMV7_EVTYPE_MASK; asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val)); } } static inline int armv7_pmnc_enable_counter(int idx) { u32 counter = ARMV7_IDX_TO_COUNTER(idx); asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (BIT(counter))); return idx; } static inline int armv7_pmnc_disable_counter(int idx) { u32 counter = ARMV7_IDX_TO_COUNTER(idx); asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (BIT(counter))); return idx; } static inline int armv7_pmnc_enable_intens(int idx) { u32 counter = ARMV7_IDX_TO_COUNTER(idx); asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (BIT(counter))); return idx; } static inline int armv7_pmnc_disable_intens(int idx) { u32 counter = ARMV7_IDX_TO_COUNTER(idx); asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (BIT(counter))); isb(); /* Clear the overflow flag in case an interrupt is pending. */ asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (BIT(counter))); isb(); return idx; } static inline u32 armv7_pmnc_getreset_flags(void) { u32 val; /* Read */ asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); /* Write to clear flags */ val &= ARMV7_FLAG_MASK; asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val)); return val; } #ifdef DEBUG static void armv7_pmnc_dump_regs(struct arm_pmu *cpu_pmu) { u32 val; unsigned int cnt; printk(KERN_INFO "PMNC registers dump:\n"); asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val)); printk(KERN_INFO "PMNC =0x%08x\n", val); asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val)); printk(KERN_INFO "CNTENS=0x%08x\n", val); asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val)); printk(KERN_INFO "INTENS=0x%08x\n", val); asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); printk(KERN_INFO "FLAGS =0x%08x\n", val); asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val)); printk(KERN_INFO "SELECT=0x%08x\n", val); asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val)); printk(KERN_INFO "CCNT =0x%08x\n", val); for (cnt = ARMV7_IDX_COUNTER0; cnt <= ARMV7_IDX_COUNTER_LAST(cpu_pmu); cnt++) { armv7_pmnc_select_counter(cnt); asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val)); printk(KERN_INFO "CNT[%d] count =0x%08x\n", ARMV7_IDX_TO_COUNTER(cnt), val); asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val)); printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n", ARMV7_IDX_TO_COUNTER(cnt), val); } } #endif static void armv7pmu_enable_event(struct perf_event *event) { unsigned long flags; struct hw_perf_event *hwc = &event->hw; struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); struct pmu_hw_events *events = cpu_pmu->get_hw_events(); int idx = hwc->idx; if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) { pr_err("CPU%u enabling wrong PMNC counter IRQ enable %d\n", smp_processor_id(), idx); return; } /* * Enable counter and interrupt, and set the counter to count * the event that we're interested in. */ raw_spin_lock_irqsave(&events->pmu_lock, flags); /* * Disable counter */ armv7_pmnc_disable_counter(idx); /* * Set event (if destined for PMNx counters) * We only need to set the event for the cycle counter if we * have the ability to perform event filtering. */ if (cpu_pmu->set_event_filter || idx != ARMV7_IDX_CYCLE_COUNTER) armv7_pmnc_write_evtsel(idx, hwc->config_base); /* * Enable interrupt for this counter */ armv7_pmnc_enable_intens(idx); /* * Enable counter */ armv7_pmnc_enable_counter(idx); raw_spin_unlock_irqrestore(&events->pmu_lock, flags); } static void armv7pmu_disable_event(struct perf_event *event) { unsigned long flags; struct hw_perf_event *hwc = &event->hw; struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); struct pmu_hw_events *events = cpu_pmu->get_hw_events(); int idx = hwc->idx; if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) { pr_err("CPU%u disabling wrong PMNC counter IRQ enable %d\n", smp_processor_id(), idx); return; } /* * Disable counter and interrupt */ raw_spin_lock_irqsave(&events->pmu_lock, flags); /* * Disable counter */ armv7_pmnc_disable_counter(idx); /* * Disable interrupt for this counter */ armv7_pmnc_disable_intens(idx); raw_spin_unlock_irqrestore(&events->pmu_lock, flags); } static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev) { u32 pmnc; struct perf_sample_data data; struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev; struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events(); struct pt_regs *regs; int idx; /* * Get and reset the IRQ flags */ pmnc = armv7_pmnc_getreset_flags(); /* * Did an overflow occur? */ if (!armv7_pmnc_has_overflowed(pmnc)) return IRQ_NONE; /* * Handle the counter(s) overflow(s) */ regs = get_irq_regs(); for (idx = 0; idx < cpu_pmu->num_events; ++idx) { struct perf_event *event = cpuc->events[idx]; struct hw_perf_event *hwc; /* Ignore if we don't have an event. */ if (!event) continue; /* * We have a single interrupt for all counters. Check that * each counter has overflowed before we process it. */ if (!armv7_pmnc_counter_has_overflowed(pmnc, idx)) continue; hwc = &event->hw; armpmu_event_update(event); perf_sample_data_init(&data, 0, hwc->last_period); if (!armpmu_event_set_period(event)) continue; if (perf_event_overflow(event, &data, regs)) cpu_pmu->disable(event); } /* * Handle the pending perf events. * * Note: this call *must* be run with interrupts disabled. For * platforms that can have the PMU interrupts raised as an NMI, this * will not work. */ irq_work_run(); return IRQ_HANDLED; } static void armv7pmu_start(struct arm_pmu *cpu_pmu) { unsigned long flags; struct pmu_hw_events *events = cpu_pmu->get_hw_events(); raw_spin_lock_irqsave(&events->pmu_lock, flags); /* Enable all counters */ armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E); raw_spin_unlock_irqrestore(&events->pmu_lock, flags); } static void armv7pmu_stop(struct arm_pmu *cpu_pmu) { unsigned long flags; struct pmu_hw_events *events = cpu_pmu->get_hw_events(); raw_spin_lock_irqsave(&events->pmu_lock, flags); /* Disable all counters */ armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E); raw_spin_unlock_irqrestore(&events->pmu_lock, flags); } static int armv7pmu_get_event_idx(struct pmu_hw_events *cpuc, struct perf_event *event) { int idx; struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); struct hw_perf_event *hwc = &event->hw; unsigned long evtype = hwc->config_base & ARMV7_EVTYPE_EVENT; /* Always place a cycle counter into the cycle counter. */ if (evtype == ARMV7_PERFCTR_CPU_CYCLES) { if (test_and_set_bit(ARMV7_IDX_CYCLE_COUNTER, cpuc->used_mask)) return -EAGAIN; return ARMV7_IDX_CYCLE_COUNTER; } /* * For anything other than a cycle counter, try and use * the events counters */ for (idx = ARMV7_IDX_COUNTER0; idx < cpu_pmu->num_events; ++idx) { if (!test_and_set_bit(idx, cpuc->used_mask)) return idx; } /* The counters are all in use. */ return -EAGAIN; } /* * Add an event filter to a given event. This will only work for PMUv2 PMUs. */ static int armv7pmu_set_event_filter(struct hw_perf_event *event, struct perf_event_attr *attr) { unsigned long config_base = 0; if (attr->exclude_idle) return -EPERM; if (attr->exclude_user) config_base |= ARMV7_EXCLUDE_USER; if (attr->exclude_kernel) config_base |= ARMV7_EXCLUDE_PL1; if (!attr->exclude_hv) config_base |= ARMV7_INCLUDE_HYP; /* * Install the filter into config_base as this is used to * construct the event type. */ event->config_base = config_base; return 0; } static void armv7pmu_reset(void *info) { struct arm_pmu *cpu_pmu = (struct arm_pmu *)info; u32 idx, nb_cnt = cpu_pmu->num_events; /* The counter and interrupt enable registers are unknown at reset. */ for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) { armv7_pmnc_disable_counter(idx); armv7_pmnc_disable_intens(idx); } /* Initialize & Reset PMNC: C and P bits */ armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C); } static int armv7_a8_map_event(struct perf_event *event) { return armpmu_map_event(event, &armv7_a8_perf_map, &armv7_a8_perf_cache_map, 0xFF); } static int armv7_a9_map_event(struct perf_event *event) { return armpmu_map_event(event, &armv7_a9_perf_map, &armv7_a9_perf_cache_map, 0xFF); } static int armv7_a5_map_event(struct perf_event *event) { return armpmu_map_event(event, &armv7_a5_perf_map, &armv7_a5_perf_cache_map, 0xFF); } static int armv7_a15_map_event(struct perf_event *event) { return armpmu_map_event(event, &armv7_a15_perf_map, &armv7_a15_perf_cache_map, 0xFF); } static int armv7_a7_map_event(struct perf_event *event) { return armpmu_map_event(event, &armv7_a7_perf_map, &armv7_a7_perf_cache_map, 0xFF); } static int armv7_a12_map_event(struct perf_event *event) { return armpmu_map_event(event, &armv7_a12_perf_map, &armv7_a12_perf_cache_map, 0xFF); } static int krait_map_event(struct perf_event *event) { return armpmu_map_event(event, &krait_perf_map, &krait_perf_cache_map, 0xFFFFF); } static int krait_map_event_no_branch(struct perf_event *event) { return armpmu_map_event(event, &krait_perf_map_no_branch, &krait_perf_cache_map, 0xFFFFF); } static void armv7pmu_init(struct arm_pmu *cpu_pmu) { cpu_pmu->handle_irq = armv7pmu_handle_irq; cpu_pmu->enable = armv7pmu_enable_event; cpu_pmu->disable = armv7pmu_disable_event; cpu_pmu->read_counter = armv7pmu_read_counter; cpu_pmu->write_counter = armv7pmu_write_counter; cpu_pmu->get_event_idx = armv7pmu_get_event_idx; cpu_pmu->start = armv7pmu_start; cpu_pmu->stop = armv7pmu_stop; cpu_pmu->reset = armv7pmu_reset; cpu_pmu->max_period = (1LLU << 32) - 1; }; static u32 armv7_read_num_pmnc_events(void) { u32 nb_cnt; /* Read the nb of CNTx counters supported from PMNC */ nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK; /* Add the CPU cycles counter and return */ return nb_cnt + 1; } static int armv7_a8_pmu_init(struct arm_pmu *cpu_pmu) { armv7pmu_init(cpu_pmu); cpu_pmu->name = "armv7_cortex_a8"; cpu_pmu->map_event = armv7_a8_map_event; cpu_pmu->num_events = armv7_read_num_pmnc_events(); return 0; } static int armv7_a9_pmu_init(struct arm_pmu *cpu_pmu) { armv7pmu_init(cpu_pmu); cpu_pmu->name = "armv7_cortex_a9"; cpu_pmu->map_event = armv7_a9_map_event; cpu_pmu->num_events = armv7_read_num_pmnc_events(); return 0; } static int armv7_a5_pmu_init(struct arm_pmu *cpu_pmu) { armv7pmu_init(cpu_pmu); cpu_pmu->name = "armv7_cortex_a5"; cpu_pmu->map_event = armv7_a5_map_event; cpu_pmu->num_events = armv7_read_num_pmnc_events(); return 0; } static int armv7_a15_pmu_init(struct arm_pmu *cpu_pmu) { armv7pmu_init(cpu_pmu); cpu_pmu->name = "armv7_cortex_a15"; cpu_pmu->map_event = armv7_a15_map_event; cpu_pmu->num_events = armv7_read_num_pmnc_events(); cpu_pmu->set_event_filter = armv7pmu_set_event_filter; return 0; } static int armv7_a7_pmu_init(struct arm_pmu *cpu_pmu) { armv7pmu_init(cpu_pmu); cpu_pmu->name = "armv7_cortex_a7"; cpu_pmu->map_event = armv7_a7_map_event; cpu_pmu->num_events = armv7_read_num_pmnc_events(); cpu_pmu->set_event_filter = armv7pmu_set_event_filter; return 0; } static int armv7_a12_pmu_init(struct arm_pmu *cpu_pmu) { armv7pmu_init(cpu_pmu); cpu_pmu->name = "armv7_cortex_a12"; cpu_pmu->map_event = armv7_a12_map_event; cpu_pmu->num_events = armv7_read_num_pmnc_events(); cpu_pmu->set_event_filter = armv7pmu_set_event_filter; return 0; } static int armv7_a17_pmu_init(struct arm_pmu *cpu_pmu) { armv7_a12_pmu_init(cpu_pmu); cpu_pmu->name = "armv7_cortex_a17"; return 0; } /* * Krait Performance Monitor Region Event Selection Register (PMRESRn) * * 31 30 24 16 8 0 * +--------------------------------+ * PMRESR0 | EN | CC | CC | CC | CC | N = 1, R = 0 * +--------------------------------+ * PMRESR1 | EN | CC | CC | CC | CC | N = 1, R = 1 * +--------------------------------+ * PMRESR2 | EN | CC | CC | CC | CC | N = 1, R = 2 * +--------------------------------+ * VPMRESR0 | EN | CC | CC | CC | CC | N = 2, R = ? * +--------------------------------+ * EN | G=3 | G=2 | G=1 | G=0 * * Event Encoding: * * hwc->config_base = 0xNRCCG * * N = prefix, 1 for Krait CPU (PMRESRn), 2 for Venum VFP (VPMRESR) * R = region register * CC = class of events the group G is choosing from * G = group or particular event * * Example: 0x12021 is a Krait CPU event in PMRESR2's group 1 with code 2 * * A region (R) corresponds to a piece of the CPU (execution unit, instruction * unit, etc.) while the event code (CC) corresponds to a particular class of * events (interrupts for example). An event code is broken down into * groups (G) that can be mapped into the PMU (irq, fiqs, and irq+fiqs for * example). */ #define KRAIT_EVENT (1 << 16) #define VENUM_EVENT (2 << 16) #define KRAIT_EVENT_MASK (KRAIT_EVENT | VENUM_EVENT) #define PMRESRn_EN BIT(31) static u32 krait_read_pmresrn(int n) { u32 val; switch (n) { case 0: asm volatile("mrc p15, 1, %0, c9, c15, 0" : "=r" (val)); break; case 1: asm volatile("mrc p15, 1, %0, c9, c15, 1" : "=r" (val)); break; case 2: asm volatile("mrc p15, 1, %0, c9, c15, 2" : "=r" (val)); break; default: BUG(); /* Should be validated in krait_pmu_get_event_idx() */ } return val; } static void krait_write_pmresrn(int n, u32 val) { switch (n) { case 0: asm volatile("mcr p15, 1, %0, c9, c15, 0" : : "r" (val)); break; case 1: asm volatile("mcr p15, 1, %0, c9, c15, 1" : : "r" (val)); break; case 2: asm volatile("mcr p15, 1, %0, c9, c15, 2" : : "r" (val)); break; default: BUG(); /* Should be validated in krait_pmu_get_event_idx() */ } } static u32 krait_read_vpmresr0(void) { u32 val; asm volatile("mrc p10, 7, %0, c11, c0, 0" : "=r" (val)); return val; } static void krait_write_vpmresr0(u32 val) { asm volatile("mcr p10, 7, %0, c11, c0, 0" : : "r" (val)); } static void krait_pre_vpmresr0(u32 *venum_orig_val, u32 *fp_orig_val) { u32 venum_new_val; u32 fp_new_val; BUG_ON(preemptible()); /* CPACR Enable CP10 and CP11 access */ *venum_orig_val = get_copro_access(); venum_new_val = *venum_orig_val | CPACC_SVC(10) | CPACC_SVC(11); set_copro_access(venum_new_val); /* Enable FPEXC */ *fp_orig_val = fmrx(FPEXC); fp_new_val = *fp_orig_val | FPEXC_EN; fmxr(FPEXC, fp_new_val); } static void krait_post_vpmresr0(u32 venum_orig_val, u32 fp_orig_val) { BUG_ON(preemptible()); /* Restore FPEXC */ fmxr(FPEXC, fp_orig_val); isb(); /* Restore CPACR */ set_copro_access(venum_orig_val); } static u32 krait_get_pmresrn_event(unsigned int region) { static const u32 pmresrn_table[] = { KRAIT_PMRESR0_GROUP0, KRAIT_PMRESR1_GROUP0, KRAIT_PMRESR2_GROUP0 }; return pmresrn_table[region]; } static void krait_evt_setup(int idx, u32 config_base) { u32 val; u32 mask; u32 vval, fval; unsigned int region; unsigned int group; unsigned int code; unsigned int group_shift; bool venum_event; venum_event = !!(config_base & VENUM_EVENT); region = (config_base >> 12) & 0xf; code = (config_base >> 4) & 0xff; group = (config_base >> 0) & 0xf; group_shift = group * 8; mask = 0xff << group_shift; /* Configure evtsel for the region and group */ if (venum_event) val = KRAIT_VPMRESR0_GROUP0; else val = krait_get_pmresrn_event(region); val += group; /* Mix in mode-exclusion bits */ val |= config_base & (ARMV7_EXCLUDE_USER | ARMV7_EXCLUDE_PL1); armv7_pmnc_write_evtsel(idx, val); asm volatile("mcr p15, 0, %0, c9, c15, 0" : : "r" (0)); if (venum_event) { krait_pre_vpmresr0(&vval, &fval); val = krait_read_vpmresr0(); val &= ~mask; val |= code << group_shift; val |= PMRESRn_EN; krait_write_vpmresr0(val); krait_post_vpmresr0(vval, fval); } else { val = krait_read_pmresrn(region); val &= ~mask; val |= code << group_shift; val |= PMRESRn_EN; krait_write_pmresrn(region, val); } } static u32 krait_clear_pmresrn_group(u32 val, int group) { u32 mask; int group_shift; group_shift = group * 8; mask = 0xff << group_shift; val &= ~mask; /* Don't clear enable bit if entire region isn't disabled */ if (val & ~PMRESRn_EN) return val |= PMRESRn_EN; return 0; } static void krait_clearpmu(u32 config_base) { u32 val; u32 vval, fval; unsigned int region; unsigned int group; bool venum_event; venum_event = !!(config_base & VENUM_EVENT); region = (config_base >> 12) & 0xf; group = (config_base >> 0) & 0xf; if (venum_event) { krait_pre_vpmresr0(&vval, &fval); val = krait_read_vpmresr0(); val = krait_clear_pmresrn_group(val, group); krait_write_vpmresr0(val); krait_post_vpmresr0(vval, fval); } else { val = krait_read_pmresrn(region); val = krait_clear_pmresrn_group(val, group); krait_write_pmresrn(region, val); } } static void krait_pmu_disable_event(struct perf_event *event) { unsigned long flags; struct hw_perf_event *hwc = &event->hw; int idx = hwc->idx; struct pmu_hw_events *events = cpu_pmu->get_hw_events(); /* Disable counter and interrupt */ raw_spin_lock_irqsave(&events->pmu_lock, flags); /* Disable counter */ armv7_pmnc_disable_counter(idx); /* * Clear pmresr code (if destined for PMNx counters) */ if (hwc->config_base & KRAIT_EVENT_MASK) krait_clearpmu(hwc->config_base); /* Disable interrupt for this counter */ armv7_pmnc_disable_intens(idx); raw_spin_unlock_irqrestore(&events->pmu_lock, flags); } static void krait_pmu_enable_event(struct perf_event *event) { unsigned long flags; struct hw_perf_event *hwc = &event->hw; int idx = hwc->idx; struct pmu_hw_events *events = cpu_pmu->get_hw_events(); /* * Enable counter and interrupt, and set the counter to count * the event that we're interested in. */ raw_spin_lock_irqsave(&events->pmu_lock, flags); /* Disable counter */ armv7_pmnc_disable_counter(idx); /* * Set event (if destined for PMNx counters) * We set the event for the cycle counter because we * have the ability to perform event filtering. */ if (hwc->config_base & KRAIT_EVENT_MASK) krait_evt_setup(idx, hwc->config_base); else armv7_pmnc_write_evtsel(idx, hwc->config_base); /* Enable interrupt for this counter */ armv7_pmnc_enable_intens(idx); /* Enable counter */ armv7_pmnc_enable_counter(idx); raw_spin_unlock_irqrestore(&events->pmu_lock, flags); } static void krait_pmu_reset(void *info) { u32 vval, fval; armv7pmu_reset(info); /* Clear all pmresrs */ krait_write_pmresrn(0, 0); krait_write_pmresrn(1, 0); krait_write_pmresrn(2, 0); krait_pre_vpmresr0(&vval, &fval); krait_write_vpmresr0(0); krait_post_vpmresr0(vval, fval); } static int krait_event_to_bit(struct perf_event *event, unsigned int region, unsigned int group) { int bit; struct hw_perf_event *hwc = &event->hw; struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu); if (hwc->config_base & VENUM_EVENT) bit = KRAIT_VPMRESR0_GROUP0; else bit = krait_get_pmresrn_event(region); bit -= krait_get_pmresrn_event(0); bit += group; /* * Lower bits are reserved for use by the counters (see * armv7pmu_get_event_idx() for more info) */ bit += ARMV7_IDX_COUNTER_LAST(cpu_pmu) + 1; return bit; } /* * We check for column exclusion constraints here. * Two events cant use the same group within a pmresr register. */ static int krait_pmu_get_event_idx(struct pmu_hw_events *cpuc, struct perf_event *event) { int idx; int bit = -1; unsigned int prefix; unsigned int region; unsigned int code; unsigned int group; bool krait_event; struct hw_perf_event *hwc = &event->hw; region = (hwc->config_base >> 12) & 0xf; code = (hwc->config_base >> 4) & 0xff; group = (hwc->config_base >> 0) & 0xf; krait_event = !!(hwc->config_base & KRAIT_EVENT_MASK); if (krait_event) { /* Ignore invalid events */ if (group > 3 || region > 2) return -EINVAL; prefix = hwc->config_base & KRAIT_EVENT_MASK; if (prefix != KRAIT_EVENT && prefix != VENUM_EVENT) return -EINVAL; if (prefix == VENUM_EVENT && (code & 0xe0)) return -EINVAL; bit = krait_event_to_bit(event, region, group); if (test_and_set_bit(bit, cpuc->used_mask)) return -EAGAIN; } idx = armv7pmu_get_event_idx(cpuc, event); if (idx < 0 && bit >= 0) clear_bit(bit, cpuc->used_mask); return idx; } static void krait_pmu_clear_event_idx(struct pmu_hw_events *cpuc, struct perf_event *event) { int bit; struct hw_perf_event *hwc = &event->hw; unsigned int region; unsigned int group; bool krait_event; region = (hwc->config_base >> 12) & 0xf; group = (hwc->config_base >> 0) & 0xf; krait_event = !!(hwc->config_base & KRAIT_EVENT_MASK); if (krait_event) { bit = krait_event_to_bit(event, region, group); clear_bit(bit, cpuc->used_mask); } } static int krait_pmu_init(struct arm_pmu *cpu_pmu) { armv7pmu_init(cpu_pmu); cpu_pmu->name = "armv7_krait"; /* Some early versions of Krait don't support PC write events */ if (of_property_read_bool(cpu_pmu->plat_device->dev.of_node, "qcom,no-pc-write")) cpu_pmu->map_event = krait_map_event_no_branch; else cpu_pmu->map_event = krait_map_event; cpu_pmu->num_events = armv7_read_num_pmnc_events(); cpu_pmu->set_event_filter = armv7pmu_set_event_filter; cpu_pmu->reset = krait_pmu_reset; cpu_pmu->enable = krait_pmu_enable_event; cpu_pmu->disable = krait_pmu_disable_event; cpu_pmu->get_event_idx = krait_pmu_get_event_idx; cpu_pmu->clear_event_idx = krait_pmu_clear_event_idx; return 0; } #else static inline int armv7_a8_pmu_init(struct arm_pmu *cpu_pmu) { return -ENODEV; } static inline int armv7_a9_pmu_init(struct arm_pmu *cpu_pmu) { return -ENODEV; } static inline int armv7_a5_pmu_init(struct arm_pmu *cpu_pmu) { return -ENODEV; } static inline int armv7_a15_pmu_init(struct arm_pmu *cpu_pmu) { return -ENODEV; } static inline int armv7_a7_pmu_init(struct arm_pmu *cpu_pmu) { return -ENODEV; } static inline int armv7_a12_pmu_init(struct arm_pmu *cpu_pmu) { return -ENODEV; } static inline int armv7_a17_pmu_init(struct arm_pmu *cpu_pmu) { return -ENODEV; } static inline int krait_pmu_init(struct arm_pmu *cpu_pmu) { return -ENODEV; } #endif /* CONFIG_CPU_V7 */