ARM: 5903/1: arm/perfevents: add support for ARMv7
Adds the Performance Events support for ARMv7 processor, using the PMNC unit in HW. Supports the following: - Cortex-A8 and Cortex-A9 processors, - dynamic detection of the number of available counters, based on the PMCR value, - runtime detection of the CPU arch (v6 or v7) and model (Cortex-A8 or Cortex-A9) Tested on OMAP3 (Cortex-A8) only. Signed-off-by: Jean Pihet <jpihet@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Jean PIHET
Russell King
parent
1b8873a0c6
commit
796d12959a
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@ -1176,7 +1176,7 @@ config HIGHPTE
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config HW_PERF_EVENTS
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bool "Enable hardware performance counter support for perf events"
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depends on PERF_EVENTS && CPU_HAS_PMU && CPU_V6
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depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
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default y
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help
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Enable hardware performance counter support for perf events. If
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@ -5,6 +5,9 @@
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*
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* Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles
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*
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* ARMv7 support: Jean Pihet <jpihet@mvista.com>
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* 2010 (c) MontaVista Software, LLC.
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*
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* This code is based on the sparc64 perf event code, which is in turn based
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* on the x86 code. Callchain code is based on the ARM OProfile backtrace
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* code.
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@ -35,8 +38,12 @@ DEFINE_SPINLOCK(pmu_lock);
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* ARMv6 supports a maximum of 3 events, starting from index 1. If we add
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* another platform that supports more, we need to increase this to be the
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* largest of all platforms.
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*
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* ARMv7 supports up to 32 events:
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* cycle counter CCNT + 31 events counters CNT0..30.
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* Cortex-A8 has 1+4 counters, Cortex-A9 has 1+6 counters.
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*/
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#define ARMPMU_MAX_HWEVENTS 4
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#define ARMPMU_MAX_HWEVENTS 33
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/* The events for a given CPU. */
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struct cpu_hw_events {
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@ -61,7 +68,7 @@ struct cpu_hw_events {
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DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
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struct arm_pmu {
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const char *name;
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char *name;
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irqreturn_t (*handle_irq)(int irq_num, void *dev);
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void (*enable)(struct hw_perf_event *evt, int idx);
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void (*disable)(struct hw_perf_event *evt, int idx);
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@ -1174,6 +1181,903 @@ static const struct arm_pmu armv6mpcore_pmu = {
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.max_period = (1LLU << 32) - 1,
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};
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/*
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* ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code.
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*
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* Copied from ARMv6 code, with the low level code inspired
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* by the ARMv7 Oprofile code.
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*
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* Cortex-A8 has up to 4 configurable performance counters and
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* a single cycle counter.
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* Cortex-A9 has up to 31 configurable performance counters and
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* a single cycle counter.
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*
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* All counters can be enabled/disabled and IRQ masked separately. The cycle
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* counter and all 4 performance counters together can be reset separately.
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*/
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#define ARMV7_PMU_CORTEX_A8_NAME "ARMv7 Cortex-A8"
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#define ARMV7_PMU_CORTEX_A9_NAME "ARMv7 Cortex-A9"
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/* Common ARMv7 event types */
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enum armv7_perf_types {
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ARMV7_PERFCTR_PMNC_SW_INCR = 0x00,
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ARMV7_PERFCTR_IFETCH_MISS = 0x01,
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ARMV7_PERFCTR_ITLB_MISS = 0x02,
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ARMV7_PERFCTR_DCACHE_REFILL = 0x03,
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ARMV7_PERFCTR_DCACHE_ACCESS = 0x04,
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ARMV7_PERFCTR_DTLB_REFILL = 0x05,
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ARMV7_PERFCTR_DREAD = 0x06,
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ARMV7_PERFCTR_DWRITE = 0x07,
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ARMV7_PERFCTR_EXC_TAKEN = 0x09,
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ARMV7_PERFCTR_EXC_EXECUTED = 0x0A,
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ARMV7_PERFCTR_CID_WRITE = 0x0B,
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/* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS.
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* It counts:
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* - all branch instructions,
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* - instructions that explicitly write the PC,
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* - exception generating instructions.
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*/
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ARMV7_PERFCTR_PC_WRITE = 0x0C,
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ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D,
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ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F,
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ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10,
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ARMV7_PERFCTR_CLOCK_CYCLES = 0x11,
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ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12,
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ARMV7_PERFCTR_CPU_CYCLES = 0xFF
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};
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/* ARMv7 Cortex-A8 specific event types */
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enum armv7_a8_perf_types {
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ARMV7_PERFCTR_INSTR_EXECUTED = 0x08,
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ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E,
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ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40,
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ARMV7_PERFCTR_L2_STORE_MERGED = 0x41,
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ARMV7_PERFCTR_L2_STORE_BUFF = 0x42,
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ARMV7_PERFCTR_L2_ACCESS = 0x43,
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ARMV7_PERFCTR_L2_CACH_MISS = 0x44,
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ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45,
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ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46,
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ARMV7_PERFCTR_MEMORY_REPLAY = 0x47,
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ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48,
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ARMV7_PERFCTR_L1_DATA_MISS = 0x49,
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ARMV7_PERFCTR_L1_INST_MISS = 0x4A,
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ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B,
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ARMV7_PERFCTR_L1_NEON_DATA = 0x4C,
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ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D,
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ARMV7_PERFCTR_L2_NEON = 0x4E,
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ARMV7_PERFCTR_L2_NEON_HIT = 0x4F,
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ARMV7_PERFCTR_L1_INST = 0x50,
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ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51,
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ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52,
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ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53,
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ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54,
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ARMV7_PERFCTR_OP_EXECUTED = 0x55,
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ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56,
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ARMV7_PERFCTR_CYCLES_INST = 0x57,
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ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58,
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ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59,
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ARMV7_PERFCTR_NEON_CYCLES = 0x5A,
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ARMV7_PERFCTR_PMU0_EVENTS = 0x70,
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ARMV7_PERFCTR_PMU1_EVENTS = 0x71,
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ARMV7_PERFCTR_PMU_EVENTS = 0x72,
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};
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/* ARMv7 Cortex-A9 specific event types */
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enum armv7_a9_perf_types {
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ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40,
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ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41,
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ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42,
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ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50,
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ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51,
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ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60,
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ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61,
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ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62,
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ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63,
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ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64,
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ARMV7_PERFCTR_DATA_EVICTION = 0x65,
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ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66,
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ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67,
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ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68,
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ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E,
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ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70,
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ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71,
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ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72,
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ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73,
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ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74,
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ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80,
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ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81,
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ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82,
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ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83,
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ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84,
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ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85,
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ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86,
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ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A,
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ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B,
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ARMV7_PERFCTR_ISB_INST = 0x90,
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ARMV7_PERFCTR_DSB_INST = 0x91,
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ARMV7_PERFCTR_DMB_INST = 0x92,
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ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93,
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ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0,
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ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1,
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ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2,
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ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3,
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ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4,
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ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5
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};
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/*
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* Cortex-A8 HW events mapping
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*
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* The hardware events that we support. We do support cache operations but
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* we have harvard caches and no way to combine instruction and data
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* accesses/misses in hardware.
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*/
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static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = {
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[PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
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[PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
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[PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
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[PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
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[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
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[PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
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[PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
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};
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static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
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[PERF_COUNT_HW_CACHE_OP_MAX]
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[PERF_COUNT_HW_CACHE_RESULT_MAX] = {
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[C(L1D)] = {
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/*
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* The performance counters don't differentiate between read
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* and write accesses/misses so this isn't strictly correct,
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* but it's the best we can do. Writes and reads get
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* combined.
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*/
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[C(OP_READ)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
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},
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[C(OP_WRITE)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
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},
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[C(OP_PREFETCH)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
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},
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},
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[C(L1I)] = {
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[C(OP_READ)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
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},
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[C(OP_WRITE)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
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},
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[C(OP_PREFETCH)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
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},
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},
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[C(LL)] = {
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[C(OP_READ)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
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},
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[C(OP_WRITE)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
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},
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[C(OP_PREFETCH)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
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},
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},
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[C(DTLB)] = {
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/*
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* Only ITLB misses and DTLB refills are supported.
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* If users want the DTLB refills misses a raw counter
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* must be used.
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*/
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[C(OP_READ)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
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},
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[C(OP_WRITE)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
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},
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[C(OP_PREFETCH)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
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},
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},
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[C(ITLB)] = {
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[C(OP_READ)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
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},
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[C(OP_WRITE)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
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},
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[C(OP_PREFETCH)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
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},
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},
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[C(BPU)] = {
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[C(OP_READ)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
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[C(RESULT_MISS)]
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= ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
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},
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[C(OP_WRITE)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
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[C(RESULT_MISS)]
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= ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
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},
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[C(OP_PREFETCH)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
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},
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},
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};
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/*
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* Cortex-A9 HW events mapping
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*/
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static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = {
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[PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
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[PERF_COUNT_HW_INSTRUCTIONS] =
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ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE,
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[PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT,
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[PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS,
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[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
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[PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
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[PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
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};
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static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
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[PERF_COUNT_HW_CACHE_OP_MAX]
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[PERF_COUNT_HW_CACHE_RESULT_MAX] = {
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[C(L1D)] = {
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/*
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* The performance counters don't differentiate between read
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* and write accesses/misses so this isn't strictly correct,
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* but it's the best we can do. Writes and reads get
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* combined.
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*/
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[C(OP_READ)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
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},
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[C(OP_WRITE)] = {
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[C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
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},
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[C(OP_PREFETCH)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
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},
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},
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[C(L1I)] = {
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[C(OP_READ)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
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},
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[C(OP_WRITE)] = {
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[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
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[C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
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},
|
||||
[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)] = {
|
||||
/*
|
||||
* Only ITLB misses and DTLB refills are supported.
|
||||
* If users want the DTLB refills misses a raw counter
|
||||
* must be used.
|
||||
*/
|
||||
[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_MISS,
|
||||
},
|
||||
[C(OP_WRITE)] = {
|
||||
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
|
||||
[C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
|
||||
},
|
||||
[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_WRITE,
|
||||
[C(RESULT_MISS)]
|
||||
= ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
|
||||
},
|
||||
[C(OP_WRITE)] = {
|
||||
[C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
|
||||
[C(RESULT_MISS)]
|
||||
= ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
|
||||
},
|
||||
[C(OP_PREFETCH)] = {
|
||||
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
|
||||
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* Perf Events counters
|
||||
*/
|
||||
enum armv7_counters {
|
||||
ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */
|
||||
ARMV7_COUNTER0 = 2, /* First event counter */
|
||||
};
|
||||
|
||||
/*
|
||||
* The cycle counter is ARMV7_CYCLE_COUNTER.
|
||||
* The first event counter is ARMV7_COUNTER0.
|
||||
* The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1).
|
||||
*/
|
||||
#define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1)
|
||||
|
||||
/*
|
||||
* ARMv7 low level PMNC access
|
||||
*/
|
||||
|
||||
/*
|
||||
* 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 */
|
||||
|
||||
/*
|
||||
* Available counters
|
||||
*/
|
||||
#define ARMV7_CNT0 0 /* First event counter */
|
||||
#define ARMV7_CCNT 31 /* Cycle counter */
|
||||
|
||||
/* Perf Event to low level counters mapping */
|
||||
#define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0)
|
||||
|
||||
/*
|
||||
* CNTENS: counters enable reg
|
||||
*/
|
||||
#define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
|
||||
#define ARMV7_CNTENS_C (1 << ARMV7_CCNT)
|
||||
|
||||
/*
|
||||
* CNTENC: counters disable reg
|
||||
*/
|
||||
#define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
|
||||
#define ARMV7_CNTENC_C (1 << ARMV7_CCNT)
|
||||
|
||||
/*
|
||||
* INTENS: counters overflow interrupt enable reg
|
||||
*/
|
||||
#define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
|
||||
#define ARMV7_INTENS_C (1 << ARMV7_CCNT)
|
||||
|
||||
/*
|
||||
* INTENC: counters overflow interrupt disable reg
|
||||
*/
|
||||
#define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
|
||||
#define ARMV7_INTENC_C (1 << ARMV7_CCNT)
|
||||
|
||||
/*
|
||||
* EVTSEL: Event selection reg
|
||||
*/
|
||||
#define ARMV7_EVTSEL_MASK 0x7f /* Mask for writable bits */
|
||||
|
||||
/*
|
||||
* SELECT: Counter selection reg
|
||||
*/
|
||||
#define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */
|
||||
|
||||
/*
|
||||
* FLAG: counters overflow flag status reg
|
||||
*/
|
||||
#define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
|
||||
#define ARMV7_FLAG_C (1 << ARMV7_CCNT)
|
||||
#define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */
|
||||
#define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK
|
||||
|
||||
static inline unsigned long 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(unsigned long val)
|
||||
{
|
||||
val &= ARMV7_PMNC_MASK;
|
||||
asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val));
|
||||
}
|
||||
|
||||
static inline int armv7_pmnc_has_overflowed(unsigned long pmnc)
|
||||
{
|
||||
return pmnc & ARMV7_OVERFLOWED_MASK;
|
||||
}
|
||||
|
||||
static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc,
|
||||
enum armv7_counters counter)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (counter == ARMV7_CYCLE_COUNTER)
|
||||
ret = pmnc & ARMV7_FLAG_C;
|
||||
else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST))
|
||||
ret = pmnc & ARMV7_FLAG_P(counter);
|
||||
else
|
||||
pr_err("CPU%u checking wrong counter %d overflow status\n",
|
||||
smp_processor_id(), counter);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int armv7_pmnc_select_counter(unsigned int idx)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) {
|
||||
pr_err("CPU%u selecting wrong PMNC counter"
|
||||
" %d\n", smp_processor_id(), idx);
|
||||
return -1;
|
||||
}
|
||||
|
||||
val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK;
|
||||
asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val));
|
||||
|
||||
return idx;
|
||||
}
|
||||
|
||||
static inline u32 armv7pmu_read_counter(int idx)
|
||||
{
|
||||
unsigned long value = 0;
|
||||
|
||||
if (idx == ARMV7_CYCLE_COUNTER)
|
||||
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
|
||||
else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
|
||||
if (armv7_pmnc_select_counter(idx) == idx)
|
||||
asm volatile("mrc p15, 0, %0, c9, c13, 2"
|
||||
: "=r" (value));
|
||||
} else
|
||||
pr_err("CPU%u reading wrong counter %d\n",
|
||||
smp_processor_id(), idx);
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
static inline void armv7pmu_write_counter(int idx, u32 value)
|
||||
{
|
||||
if (idx == ARMV7_CYCLE_COUNTER)
|
||||
asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value));
|
||||
else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
|
||||
if (armv7_pmnc_select_counter(idx) == idx)
|
||||
asm volatile("mcr p15, 0, %0, c9, c13, 2"
|
||||
: : "r" (value));
|
||||
} else
|
||||
pr_err("CPU%u writing wrong counter %d\n",
|
||||
smp_processor_id(), idx);
|
||||
}
|
||||
|
||||
static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val)
|
||||
{
|
||||
if (armv7_pmnc_select_counter(idx) == idx) {
|
||||
val &= ARMV7_EVTSEL_MASK;
|
||||
asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
|
||||
}
|
||||
}
|
||||
|
||||
static inline u32 armv7_pmnc_enable_counter(unsigned int idx)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
if ((idx != ARMV7_CYCLE_COUNTER) &&
|
||||
((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
|
||||
pr_err("CPU%u enabling wrong PMNC counter"
|
||||
" %d\n", smp_processor_id(), idx);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (idx == ARMV7_CYCLE_COUNTER)
|
||||
val = ARMV7_CNTENS_C;
|
||||
else
|
||||
val = ARMV7_CNTENS_P(idx);
|
||||
|
||||
asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val));
|
||||
|
||||
return idx;
|
||||
}
|
||||
|
||||
static inline u32 armv7_pmnc_disable_counter(unsigned int idx)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
|
||||
if ((idx != ARMV7_CYCLE_COUNTER) &&
|
||||
((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
|
||||
pr_err("CPU%u disabling wrong PMNC counter"
|
||||
" %d\n", smp_processor_id(), idx);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (idx == ARMV7_CYCLE_COUNTER)
|
||||
val = ARMV7_CNTENC_C;
|
||||
else
|
||||
val = ARMV7_CNTENC_P(idx);
|
||||
|
||||
asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val));
|
||||
|
||||
return idx;
|
||||
}
|
||||
|
||||
static inline u32 armv7_pmnc_enable_intens(unsigned int idx)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
if ((idx != ARMV7_CYCLE_COUNTER) &&
|
||||
((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
|
||||
pr_err("CPU%u enabling wrong PMNC counter"
|
||||
" interrupt enable %d\n", smp_processor_id(), idx);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (idx == ARMV7_CYCLE_COUNTER)
|
||||
val = ARMV7_INTENS_C;
|
||||
else
|
||||
val = ARMV7_INTENS_P(idx);
|
||||
|
||||
asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val));
|
||||
|
||||
return idx;
|
||||
}
|
||||
|
||||
static inline u32 armv7_pmnc_disable_intens(unsigned int idx)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
if ((idx != ARMV7_CYCLE_COUNTER) &&
|
||||
((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
|
||||
pr_err("CPU%u disabling wrong PMNC counter"
|
||||
" interrupt enable %d\n", smp_processor_id(), idx);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (idx == ARMV7_CYCLE_COUNTER)
|
||||
val = ARMV7_INTENC_C;
|
||||
else
|
||||
val = ARMV7_INTENC_P(idx);
|
||||
|
||||
asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val));
|
||||
|
||||
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(void)
|
||||
{
|
||||
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_COUNTER0; cnt < ARMV7_COUNTER_LAST; 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",
|
||||
cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
|
||||
asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
|
||||
printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n",
|
||||
cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
/*
|
||||
* Enable counter and interrupt, and set the counter to count
|
||||
* the event that we're interested in.
|
||||
*/
|
||||
spin_lock_irqsave(&pmu_lock, flags);
|
||||
|
||||
/*
|
||||
* Disable counter
|
||||
*/
|
||||
armv7_pmnc_disable_counter(idx);
|
||||
|
||||
/*
|
||||
* Set event (if destined for PMNx counters)
|
||||
* We don't need to set the event if it's a cycle count
|
||||
*/
|
||||
if (idx != ARMV7_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);
|
||||
|
||||
spin_unlock_irqrestore(&pmu_lock, flags);
|
||||
}
|
||||
|
||||
static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
/*
|
||||
* Disable counter and interrupt
|
||||
*/
|
||||
spin_lock_irqsave(&pmu_lock, flags);
|
||||
|
||||
/*
|
||||
* Disable counter
|
||||
*/
|
||||
armv7_pmnc_disable_counter(idx);
|
||||
|
||||
/*
|
||||
* Disable interrupt for this counter
|
||||
*/
|
||||
armv7_pmnc_disable_intens(idx);
|
||||
|
||||
spin_unlock_irqrestore(&pmu_lock, flags);
|
||||
}
|
||||
|
||||
static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
|
||||
{
|
||||
unsigned long pmnc;
|
||||
struct perf_sample_data data;
|
||||
struct cpu_hw_events *cpuc;
|
||||
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();
|
||||
|
||||
data.addr = 0;
|
||||
|
||||
cpuc = &__get_cpu_var(cpu_hw_events);
|
||||
for (idx = 0; idx <= armpmu->num_events; ++idx) {
|
||||
struct perf_event *event = cpuc->events[idx];
|
||||
struct hw_perf_event *hwc;
|
||||
|
||||
if (!test_bit(idx, cpuc->active_mask))
|
||||
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, hwc, idx);
|
||||
data.period = event->hw.last_period;
|
||||
if (!armpmu_event_set_period(event, hwc, idx))
|
||||
continue;
|
||||
|
||||
if (perf_event_overflow(event, 0, &data, regs))
|
||||
armpmu->disable(hwc, idx);
|
||||
}
|
||||
|
||||
/*
|
||||
* Handle the pending perf events.
|
||||
*
|
||||
* Note: this call *must* be run with interrupts enabled. For
|
||||
* platforms that can have the PMU interrupts raised as a PMI, this
|
||||
* will not work.
|
||||
*/
|
||||
perf_event_do_pending();
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void armv7pmu_start(void)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&pmu_lock, flags);
|
||||
/* Enable all counters */
|
||||
armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E);
|
||||
spin_unlock_irqrestore(&pmu_lock, flags);
|
||||
}
|
||||
|
||||
static void armv7pmu_stop(void)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&pmu_lock, flags);
|
||||
/* Disable all counters */
|
||||
armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E);
|
||||
spin_unlock_irqrestore(&pmu_lock, flags);
|
||||
}
|
||||
|
||||
static inline int armv7_a8_pmu_event_map(int config)
|
||||
{
|
||||
int mapping = armv7_a8_perf_map[config];
|
||||
if (HW_OP_UNSUPPORTED == mapping)
|
||||
mapping = -EOPNOTSUPP;
|
||||
return mapping;
|
||||
}
|
||||
|
||||
static inline int armv7_a9_pmu_event_map(int config)
|
||||
{
|
||||
int mapping = armv7_a9_perf_map[config];
|
||||
if (HW_OP_UNSUPPORTED == mapping)
|
||||
mapping = -EOPNOTSUPP;
|
||||
return mapping;
|
||||
}
|
||||
|
||||
static u64 armv7pmu_raw_event(u64 config)
|
||||
{
|
||||
return config & 0xff;
|
||||
}
|
||||
|
||||
static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc,
|
||||
struct hw_perf_event *event)
|
||||
{
|
||||
int idx;
|
||||
|
||||
/* Always place a cycle counter into the cycle counter. */
|
||||
if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) {
|
||||
if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask))
|
||||
return -EAGAIN;
|
||||
|
||||
return ARMV7_CYCLE_COUNTER;
|
||||
} else {
|
||||
/*
|
||||
* For anything other than a cycle counter, try and use
|
||||
* the events counters
|
||||
*/
|
||||
for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) {
|
||||
if (!test_and_set_bit(idx, cpuc->used_mask))
|
||||
return idx;
|
||||
}
|
||||
|
||||
/* The counters are all in use. */
|
||||
return -EAGAIN;
|
||||
}
|
||||
}
|
||||
|
||||
static struct arm_pmu armv7pmu = {
|
||||
.handle_irq = armv7pmu_handle_irq,
|
||||
.enable = armv7pmu_enable_event,
|
||||
.disable = armv7pmu_disable_event,
|
||||
.raw_event = armv7pmu_raw_event,
|
||||
.read_counter = armv7pmu_read_counter,
|
||||
.write_counter = armv7pmu_write_counter,
|
||||
.get_event_idx = armv7pmu_get_event_idx,
|
||||
.start = armv7pmu_start,
|
||||
.stop = armv7pmu_stop,
|
||||
.max_period = (1LLU << 32) - 1,
|
||||
};
|
||||
|
||||
static u32 __init armv7_reset_read_pmnc(void)
|
||||
{
|
||||
u32 nb_cnt;
|
||||
|
||||
/* Initialize & Reset PMNC: C and P bits */
|
||||
armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
|
||||
|
||||
/* 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 __init
|
||||
init_hw_perf_events(void)
|
||||
{
|
||||
|
|
@ -1199,6 +2103,30 @@ init_hw_perf_events(void)
|
|||
sizeof(armv6mpcore_perf_cache_map));
|
||||
perf_max_events = armv6mpcore_pmu.num_events;
|
||||
break;
|
||||
case 0xC080: /* Cortex-A8 */
|
||||
armv7pmu.name = ARMV7_PMU_CORTEX_A8_NAME;
|
||||
memcpy(armpmu_perf_cache_map, armv7_a8_perf_cache_map,
|
||||
sizeof(armv7_a8_perf_cache_map));
|
||||
armv7pmu.event_map = armv7_a8_pmu_event_map;
|
||||
armpmu = &armv7pmu;
|
||||
|
||||
/* Reset PMNC and read the nb of CNTx counters
|
||||
supported */
|
||||
armv7pmu.num_events = armv7_reset_read_pmnc();
|
||||
perf_max_events = armv7pmu.num_events;
|
||||
break;
|
||||
case 0xC090: /* Cortex-A9 */
|
||||
armv7pmu.name = ARMV7_PMU_CORTEX_A9_NAME;
|
||||
memcpy(armpmu_perf_cache_map, armv7_a9_perf_cache_map,
|
||||
sizeof(armv7_a9_perf_cache_map));
|
||||
armv7pmu.event_map = armv7_a9_pmu_event_map;
|
||||
armpmu = &armv7pmu;
|
||||
|
||||
/* Reset PMNC and read the nb of CNTx counters
|
||||
supported */
|
||||
armv7pmu.num_events = armv7_reset_read_pmnc();
|
||||
perf_max_events = armv7pmu.num_events;
|
||||
break;
|
||||
default:
|
||||
pr_info("no hardware support available\n");
|
||||
perf_max_events = -1;
|
||||
|
|
@ -1206,8 +2134,8 @@ init_hw_perf_events(void)
|
|||
}
|
||||
|
||||
if (armpmu)
|
||||
pr_info("enabled with %s PMU driver\n",
|
||||
armpmu->name);
|
||||
pr_info("enabled with %s PMU driver, %d counters available\n",
|
||||
armpmu->name, armpmu->num_events);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue