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linux-next/arch/arm/kernel/perf_event_v7.c
Mark Rutland fa8ad7889d arm: perf: factor arm_pmu core out to drivers 
To enable sharing of the arm_pmu code with arm64, this patch factors it
out to drivers/perf/. A new drivers/perf directory is added for
performance monitor drivers to live under.

MAINTAINERS is updated accordingly. Files added previously without a
corresponsing MAINTAINERS update (perf_regs.c, perf_callchain.c, and
perf_event.h) are also added.

Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
[will: augmented Kconfig help slightly]
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-07-31 15:01:14 +01:00

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58 KiB
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Raw Blame History

/*
* 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
#include <asm/cp15.h>
#include <asm/cputype.h>
#include <asm/irq_regs.h>
#include <asm/vfp.h>
#include "../vfp/vfpinstr.h"
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.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,
};
/* ARMv7 Scorpion specific event types */
enum scorpion_perf_types {
SCORPION_LPM0_GROUP0 = 0x4c,
SCORPION_LPM1_GROUP0 = 0x50,
SCORPION_LPM2_GROUP0 = 0x54,
SCORPION_L2LPM_GROUP0 = 0x58,
SCORPION_VLPM_GROUP0 = 0x5c,
SCORPION_ICACHE_ACCESS = 0x10053,
SCORPION_ICACHE_MISS = 0x10052,
SCORPION_DTLB_ACCESS = 0x12013,
SCORPION_DTLB_MISS = 0x12012,
SCORPION_ITLB_MISS = 0x12021,
};
/*
* 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,
};
/*
* Scorpion HW events mapping
*/
static const unsigned scorpion_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 scorpion_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)] = SCORPION_ICACHE_ACCESS,
[C(L1I)][C(OP_READ)][C(RESULT_MISS)] = SCORPION_ICACHE_MISS,
/*
* Only ITLB misses and DTLB refills are supported. If users want the
* DTLB refills misses a raw counter must be used.
*/
[C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = SCORPION_DTLB_ACCESS,
[C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = SCORPION_DTLB_MISS,
[C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = SCORPION_DTLB_ACCESS,
[C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = SCORPION_DTLB_MISS,
[C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = SCORPION_ITLB_MISS,
[C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = SCORPION_ITLB_MISS,
[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 void 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();
}
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 {
armv7_pmnc_select_counter(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 {
armv7_pmnc_select_counter(idx);
asm volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" (value));
}
}
static inline void armv7_pmnc_write_evtsel(int idx, u32 val)
{
armv7_pmnc_select_counter(idx);
val &= ARMV7_EVTYPE_MASK;
asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
}
static inline void 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)));
}
static inline void 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)));
}
static inline void 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)));
}
static inline void 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();
}
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;
pr_info("PMNC registers dump:\n");
asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val));
pr_info("PMNC =0x%08x\n", val);
asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val));
pr_info("CNTENS=0x%08x\n", val);
asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val));
pr_info("INTENS=0x%08x\n", val);
asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
pr_info("FLAGS =0x%08x\n", val);
asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val));
pr_info("SELECT=0x%08x\n", val);
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
pr_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));
pr_info("CNT[%d] count =0x%08x\n",
ARMV7_IDX_TO_COUNTER(cnt), val);
asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
pr_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 = this_cpu_ptr(cpu_pmu->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 = this_cpu_ptr(cpu_pmu->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 = this_cpu_ptr(cpu_pmu->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 = this_cpu_ptr(cpu_pmu->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 = this_cpu_ptr(cpu_pmu->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 int scorpion_map_event(struct perf_event *event)
{
return armpmu_map_event(event, &scorpion_perf_map,
&scorpion_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 void armv7_read_num_pmnc_events(void *info)
{
int *nb_cnt = info;
/* 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 */
*nb_cnt += 1;
}
static int armv7_probe_num_events(struct arm_pmu *arm_pmu)
{
return smp_call_function_any(&arm_pmu->supported_cpus,
armv7_read_num_pmnc_events,
&arm_pmu->num_events, 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;
return armv7_probe_num_events(cpu_pmu);
}
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;
return armv7_probe_num_events(cpu_pmu);
}
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;
return armv7_probe_num_events(cpu_pmu);
}
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->set_event_filter = armv7pmu_set_event_filter;
return armv7_probe_num_events(cpu_pmu);
}
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->set_event_filter = armv7pmu_set_event_filter;
return armv7_probe_num_events(cpu_pmu);
}
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->set_event_filter = armv7pmu_set_event_filter;
return armv7_probe_num_events(cpu_pmu);
}
static int armv7_a17_pmu_init(struct arm_pmu *cpu_pmu)
{
int ret = armv7_a12_pmu_init(cpu_pmu);
cpu_pmu->name = "armv7_cortex_a17";
return ret;
}
/*
* 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)
#define EVENT_REGION(event) (((event) >> 12) & 0xf) /* R */
#define EVENT_GROUP(event) ((event) & 0xf) /* G */
#define EVENT_CODE(event) (((event) >> 4) & 0xff) /* CC */
#define EVENT_VENUM(event) (!!(event & VENUM_EVENT)) /* N=2 */
#define EVENT_CPU(event) (!!(event & KRAIT_EVENT)) /* N=1 */
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 venum_read_pmresr(void)
{
u32 val;
asm volatile("mrc p10, 7, %0, c11, c0, 0" : "=r" (val));
return val;
}
static void venum_write_pmresr(u32 val)
{
asm volatile("mcr p10, 7, %0, c11, c0, 0" : : "r" (val));
}
static void venum_pre_pmresr(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 venum_post_pmresr(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 = EVENT_REGION(config_base);
unsigned int group = EVENT_GROUP(config_base);
unsigned int code = EVENT_CODE(config_base);
unsigned int group_shift;
bool venum_event = EVENT_VENUM(config_base);
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);
if (venum_event) {
venum_pre_pmresr(&vval, &fval);
val = venum_read_pmresr();
val &= ~mask;
val |= code << group_shift;
val |= PMRESRn_EN;
venum_write_pmresr(val);
venum_post_pmresr(vval, fval);
} else {
val = krait_read_pmresrn(region);
val &= ~mask;
val |= code << group_shift;
val |= PMRESRn_EN;
krait_write_pmresrn(region, val);
}
}
static u32 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 = EVENT_REGION(config_base);
unsigned int group = EVENT_GROUP(config_base);
bool venum_event = EVENT_VENUM(config_base);
if (venum_event) {
venum_pre_pmresr(&vval, &fval);
val = venum_read_pmresr();
val = clear_pmresrn_group(val, group);
venum_write_pmresr(val);
venum_post_pmresr(vval, fval);
} else {
val = krait_read_pmresrn(region);
val = 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 arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->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 arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->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;
struct arm_pmu *cpu_pmu = info;
u32 idx, nb_cnt = cpu_pmu->num_events;
armv7pmu_reset(info);
/* Clear all pmresrs */
krait_write_pmresrn(0, 0);
krait_write_pmresrn(1, 0);
krait_write_pmresrn(2, 0);
venum_pre_pmresr(&vval, &fval);
venum_write_pmresr(0);
venum_post_pmresr(vval, fval);
/* Reset PMxEVNCTCR to sane default */
for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) {
armv7_pmnc_select_counter(idx);
asm volatile("mcr p15, 0, %0, c9, c15, 0" : : "r" (0));
}
}
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;
struct hw_perf_event *hwc = &event->hw;
unsigned int region = EVENT_REGION(hwc->config_base);
unsigned int code = EVENT_CODE(hwc->config_base);
unsigned int group = EVENT_GROUP(hwc->config_base);
bool venum_event = EVENT_VENUM(hwc->config_base);
bool krait_event = EVENT_CPU(hwc->config_base);
if (venum_event || krait_event) {
/* Ignore invalid events */
if (group > 3 || region > 2)
return -EINVAL;
if (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 = EVENT_REGION(hwc->config_base);
unsigned int group = EVENT_GROUP(hwc->config_base);
bool venum_event = EVENT_VENUM(hwc->config_base);
bool krait_event = EVENT_CPU(hwc->config_base);
if (venum_event || 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->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 armv7_probe_num_events(cpu_pmu);
}
/*
* Scorpion Local Performance Monitor Register (LPMn)
*
* 31 30 24 16 8 0
* +--------------------------------+
* LPM0 | EN | CC | CC | CC | CC | N = 1, R = 0
* +--------------------------------+
* LPM1 | EN | CC | CC | CC | CC | N = 1, R = 1
* +--------------------------------+
* LPM2 | EN | CC | CC | CC | CC | N = 1, R = 2
* +--------------------------------+
* L2LPM | EN | CC | CC | CC | CC | N = 1, R = 3
* +--------------------------------+
* VLPM | 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 Scorpion CPU (LPMn/L2LPM), 2 for Venum VFP (VLPM)
* R = region register
* CC = class of events the group G is choosing from
* G = group or particular event
*
* Example: 0x12021 is a Scorpion CPU event in LPM2'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).
*/
static u32 scorpion_read_pmresrn(int n)
{
u32 val;
switch (n) {
case 0:
asm volatile("mrc p15, 0, %0, c15, c0, 0" : "=r" (val));
break;
case 1:
asm volatile("mrc p15, 1, %0, c15, c0, 0" : "=r" (val));
break;
case 2:
asm volatile("mrc p15, 2, %0, c15, c0, 0" : "=r" (val));
break;
case 3:
asm volatile("mrc p15, 3, %0, c15, c2, 0" : "=r" (val));
break;
default:
BUG(); /* Should be validated in scorpion_pmu_get_event_idx() */
}
return val;
}
static void scorpion_write_pmresrn(int n, u32 val)
{
switch (n) {
case 0:
asm volatile("mcr p15, 0, %0, c15, c0, 0" : : "r" (val));
break;
case 1:
asm volatile("mcr p15, 1, %0, c15, c0, 0" : : "r" (val));
break;
case 2:
asm volatile("mcr p15, 2, %0, c15, c0, 0" : : "r" (val));
break;
case 3:
asm volatile("mcr p15, 3, %0, c15, c2, 0" : : "r" (val));
break;
default:
BUG(); /* Should be validated in scorpion_pmu_get_event_idx() */
}
}
static u32 scorpion_get_pmresrn_event(unsigned int region)
{
static const u32 pmresrn_table[] = { SCORPION_LPM0_GROUP0,
SCORPION_LPM1_GROUP0,
SCORPION_LPM2_GROUP0,
SCORPION_L2LPM_GROUP0 };
return pmresrn_table[region];
}
static void scorpion_evt_setup(int idx, u32 config_base)
{
u32 val;
u32 mask;
u32 vval, fval;
unsigned int region = EVENT_REGION(config_base);
unsigned int group = EVENT_GROUP(config_base);
unsigned int code = EVENT_CODE(config_base);
unsigned int group_shift;
bool venum_event = EVENT_VENUM(config_base);
group_shift = group * 8;
mask = 0xff << group_shift;
/* Configure evtsel for the region and group */
if (venum_event)
val = SCORPION_VLPM_GROUP0;
else
val = scorpion_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) {
venum_pre_pmresr(&vval, &fval);
val = venum_read_pmresr();
val &= ~mask;
val |= code << group_shift;
val |= PMRESRn_EN;
venum_write_pmresr(val);
venum_post_pmresr(vval, fval);
} else {
val = scorpion_read_pmresrn(region);
val &= ~mask;
val |= code << group_shift;
val |= PMRESRn_EN;
scorpion_write_pmresrn(region, val);
}
}
static void scorpion_clearpmu(u32 config_base)
{
u32 val;
u32 vval, fval;
unsigned int region = EVENT_REGION(config_base);
unsigned int group = EVENT_GROUP(config_base);
bool venum_event = EVENT_VENUM(config_base);
if (venum_event) {
venum_pre_pmresr(&vval, &fval);
val = venum_read_pmresr();
val = clear_pmresrn_group(val, group);
venum_write_pmresr(val);
venum_post_pmresr(vval, fval);
} else {
val = scorpion_read_pmresrn(region);
val = clear_pmresrn_group(val, group);
scorpion_write_pmresrn(region, val);
}
}
static void scorpion_pmu_disable_event(struct perf_event *event)
{
unsigned long flags;
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->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)
scorpion_clearpmu(hwc->config_base);
/* Disable interrupt for this counter */
armv7_pmnc_disable_intens(idx);
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void scorpion_pmu_enable_event(struct perf_event *event)
{
unsigned long flags;
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->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 don't set the event for the cycle counter because we
* don't have the ability to perform event filtering.
*/
if (hwc->config_base & KRAIT_EVENT_MASK)
scorpion_evt_setup(idx, hwc->config_base);
else if (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 scorpion_pmu_reset(void *info)
{
u32 vval, fval;
struct arm_pmu *cpu_pmu = info;
u32 idx, nb_cnt = cpu_pmu->num_events;
armv7pmu_reset(info);
/* Clear all pmresrs */
scorpion_write_pmresrn(0, 0);
scorpion_write_pmresrn(1, 0);
scorpion_write_pmresrn(2, 0);
scorpion_write_pmresrn(3, 0);
venum_pre_pmresr(&vval, &fval);
venum_write_pmresr(0);
venum_post_pmresr(vval, fval);
/* Reset PMxEVNCTCR to sane default */
for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) {
armv7_pmnc_select_counter(idx);
asm volatile("mcr p15, 0, %0, c9, c15, 0" : : "r" (0));
}
}
static int scorpion_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 = SCORPION_VLPM_GROUP0;
else
bit = scorpion_get_pmresrn_event(region);
bit -= scorpion_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 scorpion_pmu_get_event_idx(struct pmu_hw_events *cpuc,
struct perf_event *event)
{
int idx;
int bit = -1;
struct hw_perf_event *hwc = &event->hw;
unsigned int region = EVENT_REGION(hwc->config_base);
unsigned int group = EVENT_GROUP(hwc->config_base);
bool venum_event = EVENT_VENUM(hwc->config_base);
bool scorpion_event = EVENT_CPU(hwc->config_base);
if (venum_event || scorpion_event) {
/* Ignore invalid events */
if (group > 3 || region > 3)
return -EINVAL;
bit = scorpion_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 scorpion_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 = EVENT_REGION(hwc->config_base);
unsigned int group = EVENT_GROUP(hwc->config_base);
bool venum_event = EVENT_VENUM(hwc->config_base);
bool scorpion_event = EVENT_CPU(hwc->config_base);
if (venum_event || scorpion_event) {
bit = scorpion_event_to_bit(event, region, group);
clear_bit(bit, cpuc->used_mask);
}
}
static int scorpion_pmu_init(struct arm_pmu *cpu_pmu)
{
armv7pmu_init(cpu_pmu);
cpu_pmu->name = "armv7_scorpion";
cpu_pmu->map_event = scorpion_map_event;
cpu_pmu->reset = scorpion_pmu_reset;
cpu_pmu->enable = scorpion_pmu_enable_event;
cpu_pmu->disable = scorpion_pmu_disable_event;
cpu_pmu->get_event_idx = scorpion_pmu_get_event_idx;
cpu_pmu->clear_event_idx = scorpion_pmu_clear_event_idx;
return armv7_probe_num_events(cpu_pmu);
}
static int scorpion_mp_pmu_init(struct arm_pmu *cpu_pmu)
{
armv7pmu_init(cpu_pmu);
cpu_pmu->name = "armv7_scorpion_mp";
cpu_pmu->map_event = scorpion_map_event;
cpu_pmu->reset = scorpion_pmu_reset;
cpu_pmu->enable = scorpion_pmu_enable_event;
cpu_pmu->disable = scorpion_pmu_disable_event;
cpu_pmu->get_event_idx = scorpion_pmu_get_event_idx;
cpu_pmu->clear_event_idx = scorpion_pmu_clear_event_idx;
return armv7_probe_num_events(cpu_pmu);
}
static const struct of_device_id armv7_pmu_of_device_ids[] = {
{.compatible = "arm,cortex-a17-pmu", .data = armv7_a17_pmu_init},
{.compatible = "arm,cortex-a15-pmu", .data = armv7_a15_pmu_init},
{.compatible = "arm,cortex-a12-pmu", .data = armv7_a12_pmu_init},
{.compatible = "arm,cortex-a9-pmu", .data = armv7_a9_pmu_init},
{.compatible = "arm,cortex-a8-pmu", .data = armv7_a8_pmu_init},
{.compatible = "arm,cortex-a7-pmu", .data = armv7_a7_pmu_init},
{.compatible = "arm,cortex-a5-pmu", .data = armv7_a5_pmu_init},
{.compatible = "qcom,krait-pmu", .data = krait_pmu_init},
{.compatible = "qcom,scorpion-pmu", .data = scorpion_pmu_init},
{.compatible = "qcom,scorpion-mp-pmu", .data = scorpion_mp_pmu_init},
{},
};
static const struct pmu_probe_info armv7_pmu_probe_table[] = {
ARM_PMU_PROBE(ARM_CPU_PART_CORTEX_A8, armv7_a8_pmu_init),
ARM_PMU_PROBE(ARM_CPU_PART_CORTEX_A9, armv7_a9_pmu_init),
{ /* sentinel value */ }
};
static int armv7_pmu_device_probe(struct platform_device *pdev)
{
return arm_pmu_device_probe(pdev, armv7_pmu_of_device_ids,
armv7_pmu_probe_table);
}
static struct platform_driver armv7_pmu_driver = {
.driver = {
.name = "armv7-pmu",
.of_match_table = armv7_pmu_of_device_ids,
},
.probe = armv7_pmu_device_probe,
};
static int __init register_armv7_pmu_driver(void)
{
return platform_driver_register(&armv7_pmu_driver);
}
device_initcall(register_armv7_pmu_driver);
#endif /* CONFIG_CPU_V7 */
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