- 根目录:
- arch
- arm
- kernel
- perf_event_v7.c
/*
* ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code.
*
* ARMv7 support: Jean Pihet <jpihet@mvista.com>
* 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
/*
* 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,
};
/*
* 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_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] = HW_OP_UNSUPPORTED,
[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV7_A8_PERFCTR_STALL_ISIDE,
[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED,
};
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] = {
[C(L1D)] = {
/*
* 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(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(L1I)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L1_ICACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(LL)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L2_CACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_A8_PERFCTR_L2_CACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L2_CACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_A8_PERFCTR_L2_CACHE_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(DTLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(ITLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(BPU)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(NODE)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
};
/*
* Cortex-A9 HW events mapping
*/
static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = {
[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_BUS_CYCLES] = HW_OP_UNSUPPORTED,
[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] = {
[C(L1D)] = {
/*
* 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(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(L1I)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(LL)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(DTLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(ITLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(BPU)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(NODE)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
};
/*
* Cortex-A5 HW events mapping
*/
static const unsigned armv7_a5_perf_map[PERF_COUNT_HW_MAX] = {
[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] = HW_OP_UNSUPPORTED,
[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = HW_OP_UNSUPPORTED,
[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED,
};
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] = {
[C(L1D)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL,
[C(RESULT_MISS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP,
},
},
[C(L1I)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
/*
* The prefetch counters don't differentiate between the I
* side and the D side.
*/
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL,
[C(RESULT_MISS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP,
},
},
[C(LL)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(DTLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(ITLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(BPU)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(NODE)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
};
/*
* Cortex-A15 HW events mapping
*/
static const unsigned armv7_a15_perf_map[PERF_COUNT_HW_MAX] = {
[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,
[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = HW_OP_UNSUPPORTED,
[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED,
};
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] = {
[C(L1D)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_READ,
[C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_READ,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_WRITE,
[C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_WRITE,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(L1I)] = {
/*
* 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(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(LL)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_READ,
[C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L2_CACHE_REFILL_READ,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_WRITE,
[C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L2_CACHE_REFILL_WRITE,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(DTLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_A15_PERFCTR_DTLB_REFILL_L1_READ,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_A15_PERFCTR_DTLB_REFILL_L1_WRITE,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(ITLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(BPU)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(NODE)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
};
/*
* Cortex-A7 HW events mapping
*/
static const unsigned armv7_a7_perf_map[PERF_COUNT_HW_MAX] = {
[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,
[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = HW_OP_UNSUPPORTED,
[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED,
};
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] = {
[C(L1D)] = {
/*
* 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(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(L1I)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(LL)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_CACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACHE_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_CACHE_ACCESS,
[C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACHE_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(DTLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(ITLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(BPU)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
[C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(NODE)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
};
/*
* 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 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;
}
#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;
}
#endif /* CONFIG_CPU_V7 */