Merge tag 'dm-4.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device...

[mirror_ubuntu-zesty-kernel.git] / arch / arm64 / kernel / perf_event.c

/*
 * PMU support
 *
 * Copyright (C) 2012 ARM Limited
 * Author: Will Deacon <will.deacon@arm.com>
 *
 * This code is based heavily on the ARMv7 perf event code.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <asm/irq_regs.h>
#include <asm/perf_event.h>
#include <asm/sysreg.h>
#include <asm/virt.h>

#include <linux/acpi.h>
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>

/*
 * ARMv8 PMUv3 Performance Events handling code.
 * Common event types (some are defined in asm/perf_event.h).
 */

/* At least one of the following is required. */
#define ARMV8_PMUV3_PERFCTR_INST_RETIRED                        0x08
#define ARMV8_PMUV3_PERFCTR_INST_SPEC                           0x1B

/* Common architectural events. */
#define ARMV8_PMUV3_PERFCTR_LD_RETIRED                          0x06
#define ARMV8_PMUV3_PERFCTR_ST_RETIRED                          0x07
#define ARMV8_PMUV3_PERFCTR_EXC_TAKEN                           0x09
#define ARMV8_PMUV3_PERFCTR_EXC_RETURN                          0x0A
#define ARMV8_PMUV3_PERFCTR_CID_WRITE_RETIRED                   0x0B
#define ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED                    0x0C
#define ARMV8_PMUV3_PERFCTR_BR_IMMED_RETIRED                    0x0D
#define ARMV8_PMUV3_PERFCTR_BR_RETURN_RETIRED                   0x0E
#define ARMV8_PMUV3_PERFCTR_UNALIGNED_LDST_RETIRED              0x0F
#define ARMV8_PMUV3_PERFCTR_TTBR_WRITE_RETIRED                  0x1C
#define ARMV8_PMUV3_PERFCTR_CHAIN                               0x1E
#define ARMV8_PMUV3_PERFCTR_BR_RETIRED                          0x21

/* Common microarchitectural events. */
#define ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL                    0x01
#define ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL                      0x02
#define ARMV8_PMUV3_PERFCTR_L1D_TLB_REFILL                      0x05
#define ARMV8_PMUV3_PERFCTR_MEM_ACCESS                          0x13
#define ARMV8_PMUV3_PERFCTR_L1I_CACHE                           0x14
#define ARMV8_PMUV3_PERFCTR_L1D_CACHE_WB                        0x15
#define ARMV8_PMUV3_PERFCTR_L2D_CACHE                           0x16
#define ARMV8_PMUV3_PERFCTR_L2D_CACHE_REFILL                    0x17
#define ARMV8_PMUV3_PERFCTR_L2D_CACHE_WB                        0x18
#define ARMV8_PMUV3_PERFCTR_BUS_ACCESS                          0x19
#define ARMV8_PMUV3_PERFCTR_MEMORY_ERROR                        0x1A
#define ARMV8_PMUV3_PERFCTR_BUS_CYCLES                          0x1D
#define ARMV8_PMUV3_PERFCTR_L1D_CACHE_ALLOCATE                  0x1F
#define ARMV8_PMUV3_PERFCTR_L2D_CACHE_ALLOCATE                  0x20
#define ARMV8_PMUV3_PERFCTR_BR_MIS_PRED_RETIRED                 0x22
#define ARMV8_PMUV3_PERFCTR_STALL_FRONTEND                      0x23
#define ARMV8_PMUV3_PERFCTR_STALL_BACKEND                       0x24
#define ARMV8_PMUV3_PERFCTR_L1D_TLB                             0x25
#define ARMV8_PMUV3_PERFCTR_L1I_TLB                             0x26
#define ARMV8_PMUV3_PERFCTR_L2I_CACHE                           0x27
#define ARMV8_PMUV3_PERFCTR_L2I_CACHE_REFILL                    0x28
#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_ALLOCATE                  0x29
#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_REFILL                    0x2A
#define ARMV8_PMUV3_PERFCTR_L3D_CACHE                           0x2B
#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_WB                        0x2C
#define ARMV8_PMUV3_PERFCTR_L2D_TLB_REFILL                      0x2D
#define ARMV8_PMUV3_PERFCTR_L2I_TLB_REFILL                      0x2E
#define ARMV8_PMUV3_PERFCTR_L2D_TLB                             0x2F
#define ARMV8_PMUV3_PERFCTR_L2I_TLB                             0x30

/* ARMv8 recommended implementation defined event types */
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD                       0x40
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR                       0x41
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD                0x42
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR                0x43
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_INNER             0x44
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_OUTER             0x45
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WB_VICTIM                0x46
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WB_CLEAN                 0x47
#define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_INVAL                    0x48

#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD                  0x4C
#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR                  0x4D
#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD                         0x4E
#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR                         0x4F
#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_RD                       0x50
#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_WR                       0x51
#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_REFILL_RD                0x52
#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_REFILL_WR                0x53

#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_WB_VICTIM                0x56
#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_WB_CLEAN                 0x57
#define ARMV8_IMPDEF_PERFCTR_L2D_CACHE_INVAL                    0x58

#define ARMV8_IMPDEF_PERFCTR_L2D_TLB_REFILL_RD                  0x5C
#define ARMV8_IMPDEF_PERFCTR_L2D_TLB_REFILL_WR                  0x5D
#define ARMV8_IMPDEF_PERFCTR_L2D_TLB_RD                         0x5E
#define ARMV8_IMPDEF_PERFCTR_L2D_TLB_WR                         0x5F

#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD                      0x60
#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR                      0x61
#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_SHARED                  0x62
#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_NOT_SHARED              0x63
#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_NORMAL                  0x64
#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_PERIPH                  0x65

#define ARMV8_IMPDEF_PERFCTR_MEM_ACCESS_RD                      0x66
#define ARMV8_IMPDEF_PERFCTR_MEM_ACCESS_WR                      0x67
#define ARMV8_IMPDEF_PERFCTR_UNALIGNED_LD_SPEC                  0x68
#define ARMV8_IMPDEF_PERFCTR_UNALIGNED_ST_SPEC                  0x69
#define ARMV8_IMPDEF_PERFCTR_UNALIGNED_LDST_SPEC                0x6A

#define ARMV8_IMPDEF_PERFCTR_LDREX_SPEC                         0x6C
#define ARMV8_IMPDEF_PERFCTR_STREX_PASS_SPEC                    0x6D
#define ARMV8_IMPDEF_PERFCTR_STREX_FAIL_SPEC                    0x6E
#define ARMV8_IMPDEF_PERFCTR_STREX_SPEC                         0x6F
#define ARMV8_IMPDEF_PERFCTR_LD_SPEC                            0x70
#define ARMV8_IMPDEF_PERFCTR_ST_SPEC                            0x71
#define ARMV8_IMPDEF_PERFCTR_LDST_SPEC                          0x72
#define ARMV8_IMPDEF_PERFCTR_DP_SPEC                            0x73
#define ARMV8_IMPDEF_PERFCTR_ASE_SPEC                           0x74
#define ARMV8_IMPDEF_PERFCTR_VFP_SPEC                           0x75
#define ARMV8_IMPDEF_PERFCTR_PC_WRITE_SPEC                      0x76
#define ARMV8_IMPDEF_PERFCTR_CRYPTO_SPEC                        0x77
#define ARMV8_IMPDEF_PERFCTR_BR_IMMED_SPEC                      0x78
#define ARMV8_IMPDEF_PERFCTR_BR_RETURN_SPEC                     0x79
#define ARMV8_IMPDEF_PERFCTR_BR_INDIRECT_SPEC                   0x7A

#define ARMV8_IMPDEF_PERFCTR_ISB_SPEC                           0x7C
#define ARMV8_IMPDEF_PERFCTR_DSB_SPEC                           0x7D
#define ARMV8_IMPDEF_PERFCTR_DMB_SPEC                           0x7E

#define ARMV8_IMPDEF_PERFCTR_EXC_UNDEF                          0x81
#define ARMV8_IMPDEF_PERFCTR_EXC_SVC                            0x82
#define ARMV8_IMPDEF_PERFCTR_EXC_PABORT                         0x83
#define ARMV8_IMPDEF_PERFCTR_EXC_DABORT                         0x84

#define ARMV8_IMPDEF_PERFCTR_EXC_IRQ                            0x86
#define ARMV8_IMPDEF_PERFCTR_EXC_FIQ                            0x87
#define ARMV8_IMPDEF_PERFCTR_EXC_SMC                            0x88

#define ARMV8_IMPDEF_PERFCTR_EXC_HVC                            0x8A
#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_PABORT                    0x8B
#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_DABORT                    0x8C
#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_OTHER                     0x8D
#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_IRQ                       0x8E
#define ARMV8_IMPDEF_PERFCTR_EXC_TRAP_FIQ                       0x8F
#define ARMV8_IMPDEF_PERFCTR_RC_LD_SPEC                         0x90
#define ARMV8_IMPDEF_PERFCTR_RC_ST_SPEC                         0x91

#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_RD                       0xA0
#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_WR                       0xA1
#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_REFILL_RD                0xA2
#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_REFILL_WR                0xA3

#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_WB_VICTIM                0xA6
#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_WB_CLEAN                 0xA7
#define ARMV8_IMPDEF_PERFCTR_L3D_CACHE_INVAL                    0xA8

/* ARMv8 Cortex-A53 specific event types. */
#define ARMV8_A53_PERFCTR_PREF_LINEFILL                         0xC2

/* ARMv8 Cavium ThunderX specific event types. */
#define ARMV8_THUNDER_PERFCTR_L1D_CACHE_MISS_ST                 0xE9
#define ARMV8_THUNDER_PERFCTR_L1D_CACHE_PREF_ACCESS             0xEA
#define ARMV8_THUNDER_PERFCTR_L1D_CACHE_PREF_MISS               0xEB
#define ARMV8_THUNDER_PERFCTR_L1I_CACHE_PREF_ACCESS             0xEC
#define ARMV8_THUNDER_PERFCTR_L1I_CACHE_PREF_MISS               0xED

/* PMUv3 HW events mapping. */

/*
 * ARMv8 Architectural defined events, not all of these may
 * be supported on any given implementation. Undefined events will
 * be disabled at run-time.
 */
static const unsigned armv8_pmuv3_perf_map[PERF_COUNT_HW_MAX] = {
        PERF_MAP_ALL_UNSUPPORTED,
        [PERF_COUNT_HW_CPU_CYCLES]              = ARMV8_PMUV3_PERFCTR_CPU_CYCLES,
        [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV8_PMUV3_PERFCTR_INST_RETIRED,
        [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [PERF_COUNT_HW_CACHE_MISSES]            = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,
        [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED,
        [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [PERF_COUNT_HW_BUS_CYCLES]              = ARMV8_PMUV3_PERFCTR_BUS_CYCLES,
        [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV8_PMUV3_PERFCTR_STALL_FRONTEND,
        [PERF_COUNT_HW_STALLED_CYCLES_BACKEND]  = ARMV8_PMUV3_PERFCTR_STALL_BACKEND,
};

/* ARM Cortex-A53 HW events mapping. */
static const unsigned armv8_a53_perf_map[PERF_COUNT_HW_MAX] = {
        PERF_MAP_ALL_UNSUPPORTED,
        [PERF_COUNT_HW_CPU_CYCLES]              = ARMV8_PMUV3_PERFCTR_CPU_CYCLES,
        [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV8_PMUV3_PERFCTR_INST_RETIRED,
        [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [PERF_COUNT_HW_CACHE_MISSES]            = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,
        [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED,
        [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [PERF_COUNT_HW_BUS_CYCLES]              = ARMV8_PMUV3_PERFCTR_BUS_CYCLES,
};

/* ARM Cortex-A57 and Cortex-A72 events mapping. */
static const unsigned armv8_a57_perf_map[PERF_COUNT_HW_MAX] = {
        PERF_MAP_ALL_UNSUPPORTED,
        [PERF_COUNT_HW_CPU_CYCLES]              = ARMV8_PMUV3_PERFCTR_CPU_CYCLES,
        [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV8_PMUV3_PERFCTR_INST_RETIRED,
        [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [PERF_COUNT_HW_CACHE_MISSES]            = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,
        [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [PERF_COUNT_HW_BUS_CYCLES]              = ARMV8_PMUV3_PERFCTR_BUS_CYCLES,
};

static const unsigned armv8_thunder_perf_map[PERF_COUNT_HW_MAX] = {
        PERF_MAP_ALL_UNSUPPORTED,
        [PERF_COUNT_HW_CPU_CYCLES]              = ARMV8_PMUV3_PERFCTR_CPU_CYCLES,
        [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV8_PMUV3_PERFCTR_INST_RETIRED,
        [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [PERF_COUNT_HW_CACHE_MISSES]            = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,
        [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED,
        [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV8_PMUV3_PERFCTR_STALL_FRONTEND,
        [PERF_COUNT_HW_STALLED_CYCLES_BACKEND]  = ARMV8_PMUV3_PERFCTR_STALL_BACKEND,
};

/* Broadcom Vulcan events mapping */
static const unsigned armv8_vulcan_perf_map[PERF_COUNT_HW_MAX] = {
        PERF_MAP_ALL_UNSUPPORTED,
        [PERF_COUNT_HW_CPU_CYCLES]              = ARMV8_PMUV3_PERFCTR_CPU_CYCLES,
        [PERF_COUNT_HW_INSTRUCTIONS]            = ARMV8_PMUV3_PERFCTR_INST_RETIRED,
        [PERF_COUNT_HW_CACHE_REFERENCES]        = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [PERF_COUNT_HW_CACHE_MISSES]            = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,
        [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = ARMV8_PMUV3_PERFCTR_BR_RETIRED,
        [PERF_COUNT_HW_BRANCH_MISSES]           = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [PERF_COUNT_HW_BUS_CYCLES]              = ARMV8_PMUV3_PERFCTR_BUS_CYCLES,
        [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV8_PMUV3_PERFCTR_STALL_FRONTEND,
        [PERF_COUNT_HW_STALLED_CYCLES_BACKEND]  = ARMV8_PMUV3_PERFCTR_STALL_BACKEND,
};

static const unsigned armv8_pmuv3_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)]  = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,
        [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,

        [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_L1I_CACHE,
        [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL,

        [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_L1D_TLB_REFILL,
        [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1D_TLB,

        [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL,
        [C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1I_TLB,

        [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
};

static const unsigned armv8_a53_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)]  = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,
        [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1D_CACHE,
        [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL,
        [C(L1D)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV8_A53_PERFCTR_PREF_LINEFILL,

        [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_L1I_CACHE,
        [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL,

        [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL,

        [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
};

static const unsigned armv8_a57_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)]  = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD,
        [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD,
        [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
        [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR,

        [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_L1I_CACHE,
        [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL,

        [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD,
        [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR,

        [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL,

        [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
};

static const unsigned armv8_thunder_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)]  = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD,
        [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD,
        [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
        [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_THUNDER_PERFCTR_L1D_CACHE_MISS_ST,
        [C(L1D)][C(OP_PREFETCH)][C(RESULT_ACCESS)] = ARMV8_THUNDER_PERFCTR_L1D_CACHE_PREF_ACCESS,
        [C(L1D)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV8_THUNDER_PERFCTR_L1D_CACHE_PREF_MISS,

        [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_L1I_CACHE,
        [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL,
        [C(L1I)][C(OP_PREFETCH)][C(RESULT_ACCESS)] = ARMV8_THUNDER_PERFCTR_L1I_CACHE_PREF_ACCESS,
        [C(L1I)][C(OP_PREFETCH)][C(RESULT_MISS)] = ARMV8_THUNDER_PERFCTR_L1I_CACHE_PREF_MISS,

        [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD,
        [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD,
        [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR,
        [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR,

        [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL,

        [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
};

static const unsigned armv8_vulcan_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)]  = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_RD,
        [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD,
        [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
        [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR,

        [C(L1I)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_L1I_CACHE,
        [C(L1I)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL,

        [C(ITLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL,
        [C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1I_TLB,

        [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD,
        [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR,
        [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD,
        [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR,

        [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_BR_PRED,
        [C(BPU)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED,

        [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD,
        [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR,
};

static ssize_t
armv8pmu_events_sysfs_show(struct device *dev,
                           struct device_attribute *attr, char *page)
{
        struct perf_pmu_events_attr *pmu_attr;

        pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);

        return sprintf(page, "event=0x%03llx\n", pmu_attr->id);
}

#define ARMV8_EVENT_ATTR_RESOLVE(m) #m
#define ARMV8_EVENT_ATTR(name, config) \
        PMU_EVENT_ATTR(name, armv8_event_attr_##name, \
                       config, armv8pmu_events_sysfs_show)

ARMV8_EVENT_ATTR(sw_incr, ARMV8_PMUV3_PERFCTR_SW_INCR);
ARMV8_EVENT_ATTR(l1i_cache_refill, ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL);
ARMV8_EVENT_ATTR(l1i_tlb_refill, ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL);
ARMV8_EVENT_ATTR(l1d_cache_refill, ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL);
ARMV8_EVENT_ATTR(l1d_cache, ARMV8_PMUV3_PERFCTR_L1D_CACHE);
ARMV8_EVENT_ATTR(l1d_tlb_refill, ARMV8_PMUV3_PERFCTR_L1D_TLB_REFILL);
ARMV8_EVENT_ATTR(ld_retired, ARMV8_PMUV3_PERFCTR_LD_RETIRED);
ARMV8_EVENT_ATTR(st_retired, ARMV8_PMUV3_PERFCTR_ST_RETIRED);
ARMV8_EVENT_ATTR(inst_retired, ARMV8_PMUV3_PERFCTR_INST_RETIRED);
ARMV8_EVENT_ATTR(exc_taken, ARMV8_PMUV3_PERFCTR_EXC_TAKEN);
ARMV8_EVENT_ATTR(exc_return, ARMV8_PMUV3_PERFCTR_EXC_RETURN);
ARMV8_EVENT_ATTR(cid_write_retired, ARMV8_PMUV3_PERFCTR_CID_WRITE_RETIRED);
ARMV8_EVENT_ATTR(pc_write_retired, ARMV8_PMUV3_PERFCTR_PC_WRITE_RETIRED);
ARMV8_EVENT_ATTR(br_immed_retired, ARMV8_PMUV3_PERFCTR_BR_IMMED_RETIRED);
ARMV8_EVENT_ATTR(br_return_retired, ARMV8_PMUV3_PERFCTR_BR_RETURN_RETIRED);
ARMV8_EVENT_ATTR(unaligned_ldst_retired, ARMV8_PMUV3_PERFCTR_UNALIGNED_LDST_RETIRED);
ARMV8_EVENT_ATTR(br_mis_pred, ARMV8_PMUV3_PERFCTR_BR_MIS_PRED);
ARMV8_EVENT_ATTR(cpu_cycles, ARMV8_PMUV3_PERFCTR_CPU_CYCLES);
ARMV8_EVENT_ATTR(br_pred, ARMV8_PMUV3_PERFCTR_BR_PRED);
ARMV8_EVENT_ATTR(mem_access, ARMV8_PMUV3_PERFCTR_MEM_ACCESS);
ARMV8_EVENT_ATTR(l1i_cache, ARMV8_PMUV3_PERFCTR_L1I_CACHE);
ARMV8_EVENT_ATTR(l1d_cache_wb, ARMV8_PMUV3_PERFCTR_L1D_CACHE_WB);
ARMV8_EVENT_ATTR(l2d_cache, ARMV8_PMUV3_PERFCTR_L2D_CACHE);
ARMV8_EVENT_ATTR(l2d_cache_refill, ARMV8_PMUV3_PERFCTR_L2D_CACHE_REFILL);
ARMV8_EVENT_ATTR(l2d_cache_wb, ARMV8_PMUV3_PERFCTR_L2D_CACHE_WB);
ARMV8_EVENT_ATTR(bus_access, ARMV8_PMUV3_PERFCTR_BUS_ACCESS);
ARMV8_EVENT_ATTR(memory_error, ARMV8_PMUV3_PERFCTR_MEMORY_ERROR);
ARMV8_EVENT_ATTR(inst_spec, ARMV8_PMUV3_PERFCTR_INST_SPEC);
ARMV8_EVENT_ATTR(ttbr_write_retired, ARMV8_PMUV3_PERFCTR_TTBR_WRITE_RETIRED);
ARMV8_EVENT_ATTR(bus_cycles, ARMV8_PMUV3_PERFCTR_BUS_CYCLES);
/* Don't expose the chain event in /sys, since it's useless in isolation */
ARMV8_EVENT_ATTR(l1d_cache_allocate, ARMV8_PMUV3_PERFCTR_L1D_CACHE_ALLOCATE);
ARMV8_EVENT_ATTR(l2d_cache_allocate, ARMV8_PMUV3_PERFCTR_L2D_CACHE_ALLOCATE);
ARMV8_EVENT_ATTR(br_retired, ARMV8_PMUV3_PERFCTR_BR_RETIRED);
ARMV8_EVENT_ATTR(br_mis_pred_retired, ARMV8_PMUV3_PERFCTR_BR_MIS_PRED_RETIRED);
ARMV8_EVENT_ATTR(stall_frontend, ARMV8_PMUV3_PERFCTR_STALL_FRONTEND);
ARMV8_EVENT_ATTR(stall_backend, ARMV8_PMUV3_PERFCTR_STALL_BACKEND);
ARMV8_EVENT_ATTR(l1d_tlb, ARMV8_PMUV3_PERFCTR_L1D_TLB);
ARMV8_EVENT_ATTR(l1i_tlb, ARMV8_PMUV3_PERFCTR_L1I_TLB);
ARMV8_EVENT_ATTR(l2i_cache, ARMV8_PMUV3_PERFCTR_L2I_CACHE);
ARMV8_EVENT_ATTR(l2i_cache_refill, ARMV8_PMUV3_PERFCTR_L2I_CACHE_REFILL);
ARMV8_EVENT_ATTR(l3d_cache_allocate, ARMV8_PMUV3_PERFCTR_L3D_CACHE_ALLOCATE);
ARMV8_EVENT_ATTR(l3d_cache_refill, ARMV8_PMUV3_PERFCTR_L3D_CACHE_REFILL);
ARMV8_EVENT_ATTR(l3d_cache, ARMV8_PMUV3_PERFCTR_L3D_CACHE);
ARMV8_EVENT_ATTR(l3d_cache_wb, ARMV8_PMUV3_PERFCTR_L3D_CACHE_WB);
ARMV8_EVENT_ATTR(l2d_tlb_refill, ARMV8_PMUV3_PERFCTR_L2D_TLB_REFILL);
ARMV8_EVENT_ATTR(l2i_tlb_refill, ARMV8_PMUV3_PERFCTR_L2I_TLB_REFILL);
ARMV8_EVENT_ATTR(l2d_tlb, ARMV8_PMUV3_PERFCTR_L2D_TLB);
ARMV8_EVENT_ATTR(l2i_tlb, ARMV8_PMUV3_PERFCTR_L2I_TLB);

static struct attribute *armv8_pmuv3_event_attrs[] = {
        &armv8_event_attr_sw_incr.attr.attr,
        &armv8_event_attr_l1i_cache_refill.attr.attr,
        &armv8_event_attr_l1i_tlb_refill.attr.attr,
        &armv8_event_attr_l1d_cache_refill.attr.attr,
        &armv8_event_attr_l1d_cache.attr.attr,
        &armv8_event_attr_l1d_tlb_refill.attr.attr,
        &armv8_event_attr_ld_retired.attr.attr,
        &armv8_event_attr_st_retired.attr.attr,
        &armv8_event_attr_inst_retired.attr.attr,
        &armv8_event_attr_exc_taken.attr.attr,
        &armv8_event_attr_exc_return.attr.attr,
        &armv8_event_attr_cid_write_retired.attr.attr,
        &armv8_event_attr_pc_write_retired.attr.attr,
        &armv8_event_attr_br_immed_retired.attr.attr,
        &armv8_event_attr_br_return_retired.attr.attr,
        &armv8_event_attr_unaligned_ldst_retired.attr.attr,
        &armv8_event_attr_br_mis_pred.attr.attr,
        &armv8_event_attr_cpu_cycles.attr.attr,
        &armv8_event_attr_br_pred.attr.attr,
        &armv8_event_attr_mem_access.attr.attr,
        &armv8_event_attr_l1i_cache.attr.attr,
        &armv8_event_attr_l1d_cache_wb.attr.attr,
        &armv8_event_attr_l2d_cache.attr.attr,
        &armv8_event_attr_l2d_cache_refill.attr.attr,
        &armv8_event_attr_l2d_cache_wb.attr.attr,
        &armv8_event_attr_bus_access.attr.attr,
        &armv8_event_attr_memory_error.attr.attr,
        &armv8_event_attr_inst_spec.attr.attr,
        &armv8_event_attr_ttbr_write_retired.attr.attr,
        &armv8_event_attr_bus_cycles.attr.attr,
        &armv8_event_attr_l1d_cache_allocate.attr.attr,
        &armv8_event_attr_l2d_cache_allocate.attr.attr,
        &armv8_event_attr_br_retired.attr.attr,
        &armv8_event_attr_br_mis_pred_retired.attr.attr,
        &armv8_event_attr_stall_frontend.attr.attr,
        &armv8_event_attr_stall_backend.attr.attr,
        &armv8_event_attr_l1d_tlb.attr.attr,
        &armv8_event_attr_l1i_tlb.attr.attr,
        &armv8_event_attr_l2i_cache.attr.attr,
        &armv8_event_attr_l2i_cache_refill.attr.attr,
        &armv8_event_attr_l3d_cache_allocate.attr.attr,
        &armv8_event_attr_l3d_cache_refill.attr.attr,
        &armv8_event_attr_l3d_cache.attr.attr,
        &armv8_event_attr_l3d_cache_wb.attr.attr,
        &armv8_event_attr_l2d_tlb_refill.attr.attr,
        &armv8_event_attr_l2i_tlb_refill.attr.attr,
        &armv8_event_attr_l2d_tlb.attr.attr,
        &armv8_event_attr_l2i_tlb.attr.attr,
        NULL,
};

static umode_t
armv8pmu_event_attr_is_visible(struct kobject *kobj,
                               struct attribute *attr, int unused)
{
        struct device *dev = kobj_to_dev(kobj);
        struct pmu *pmu = dev_get_drvdata(dev);
        struct arm_pmu *cpu_pmu = container_of(pmu, struct arm_pmu, pmu);
        struct perf_pmu_events_attr *pmu_attr;

        pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr.attr);

        if (test_bit(pmu_attr->id, cpu_pmu->pmceid_bitmap))
                return attr->mode;

        return 0;
}

static struct attribute_group armv8_pmuv3_events_attr_group = {
        .name = "events",
        .attrs = armv8_pmuv3_event_attrs,
        .is_visible = armv8pmu_event_attr_is_visible,
};

PMU_FORMAT_ATTR(event, "config:0-9");

static struct attribute *armv8_pmuv3_format_attrs[] = {
        &format_attr_event.attr,
        NULL,
};

static struct attribute_group armv8_pmuv3_format_attr_group = {
        .name = "format",
        .attrs = armv8_pmuv3_format_attrs,
};

/*
 * Perf Events' indices
 */
#define ARMV8_IDX_CYCLE_COUNTER 0
#define ARMV8_IDX_COUNTER0      1
#define ARMV8_IDX_COUNTER_LAST(cpu_pmu) \
        (ARMV8_IDX_CYCLE_COUNTER + cpu_pmu->num_events - 1)

/*
 * ARMv8 low level PMU access
 */

/*
 * Perf Event to low level counters mapping
 */
#define ARMV8_IDX_TO_COUNTER(x) \
        (((x) - ARMV8_IDX_COUNTER0) & ARMV8_PMU_COUNTER_MASK)

static inline u32 armv8pmu_pmcr_read(void)
{
        return read_sysreg(pmcr_el0);
}

static inline void armv8pmu_pmcr_write(u32 val)
{
        val &= ARMV8_PMU_PMCR_MASK;
        isb();
        write_sysreg(val, pmcr_el0);
}

static inline int armv8pmu_has_overflowed(u32 pmovsr)
{
        return pmovsr & ARMV8_PMU_OVERFLOWED_MASK;
}

static inline int armv8pmu_counter_valid(struct arm_pmu *cpu_pmu, int idx)
{
        return idx >= ARMV8_IDX_CYCLE_COUNTER &&
                idx <= ARMV8_IDX_COUNTER_LAST(cpu_pmu);
}

static inline int armv8pmu_counter_has_overflowed(u32 pmnc, int idx)
{
        return pmnc & BIT(ARMV8_IDX_TO_COUNTER(idx));
}

static inline int armv8pmu_select_counter(int idx)
{
        u32 counter = ARMV8_IDX_TO_COUNTER(idx);
        write_sysreg(counter, pmselr_el0);
        isb();

        return idx;
}

static inline u32 armv8pmu_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 (!armv8pmu_counter_valid(cpu_pmu, idx))
                pr_err("CPU%u reading wrong counter %d\n",
                        smp_processor_id(), idx);
        else if (idx == ARMV8_IDX_CYCLE_COUNTER)
                value = read_sysreg(pmccntr_el0);
        else if (armv8pmu_select_counter(idx) == idx)
                value = read_sysreg(pmxevcntr_el0);

        return value;
}

static inline void armv8pmu_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 (!armv8pmu_counter_valid(cpu_pmu, idx))
                pr_err("CPU%u writing wrong counter %d\n",
                        smp_processor_id(), idx);
        else if (idx == ARMV8_IDX_CYCLE_COUNTER) {
                /*
                 * Set the upper 32bits as this is a 64bit counter but we only
                 * count using the lower 32bits and we want an interrupt when
                 * it overflows.
                 */
                u64 value64 = 0xffffffff00000000ULL | value;

                write_sysreg(value64, pmccntr_el0);
        } else if (armv8pmu_select_counter(idx) == idx)
                write_sysreg(value, pmxevcntr_el0);
}

static inline void armv8pmu_write_evtype(int idx, u32 val)
{
        if (armv8pmu_select_counter(idx) == idx) {
                val &= ARMV8_PMU_EVTYPE_MASK;
                write_sysreg(val, pmxevtyper_el0);
        }
}

static inline int armv8pmu_enable_counter(int idx)
{
        u32 counter = ARMV8_IDX_TO_COUNTER(idx);
        write_sysreg(BIT(counter), pmcntenset_el0);
        return idx;
}

static inline int armv8pmu_disable_counter(int idx)
{
        u32 counter = ARMV8_IDX_TO_COUNTER(idx);
        write_sysreg(BIT(counter), pmcntenclr_el0);
        return idx;
}

static inline int armv8pmu_enable_intens(int idx)
{
        u32 counter = ARMV8_IDX_TO_COUNTER(idx);
        write_sysreg(BIT(counter), pmintenset_el1);
        return idx;
}

static inline int armv8pmu_disable_intens(int idx)
{
        u32 counter = ARMV8_IDX_TO_COUNTER(idx);
        write_sysreg(BIT(counter), pmintenclr_el1);
        isb();
        /* Clear the overflow flag in case an interrupt is pending. */
        write_sysreg(BIT(counter), pmovsclr_el0);
        isb();

        return idx;
}

static inline u32 armv8pmu_getreset_flags(void)
{
        u32 value;

        /* Read */
        value = read_sysreg(pmovsclr_el0);

        /* Write to clear flags */
        value &= ARMV8_PMU_OVSR_MASK;
        write_sysreg(value, pmovsclr_el0);

        return value;
}

static void armv8pmu_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;

        /*
         * 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
         */
        armv8pmu_disable_counter(idx);

        /*
         * Set event (if destined for PMNx counters).
         */
        armv8pmu_write_evtype(idx, hwc->config_base);

        /*
         * Enable interrupt for this counter
         */
        armv8pmu_enable_intens(idx);

        /*
         * Enable counter
         */
        armv8pmu_enable_counter(idx);

        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}

static void armv8pmu_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;

        /*
         * Disable counter and interrupt
         */
        raw_spin_lock_irqsave(&events->pmu_lock, flags);

        /*
         * Disable counter
         */
        armv8pmu_disable_counter(idx);

        /*
         * Disable interrupt for this counter
         */
        armv8pmu_disable_intens(idx);

        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}

static irqreturn_t armv8pmu_handle_irq(int irq_num, void *dev)
{
        u32 pmovsr;
        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
         */
        pmovsr = armv8pmu_getreset_flags();

        /*
         * Did an overflow occur?
         */
        if (!armv8pmu_has_overflowed(pmovsr))
                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 (!armv8pmu_counter_has_overflowed(pmovsr, 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 armv8pmu_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 */
        armv8pmu_pmcr_write(armv8pmu_pmcr_read() | ARMV8_PMU_PMCR_E);
        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}

static void armv8pmu_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 */
        armv8pmu_pmcr_write(armv8pmu_pmcr_read() & ~ARMV8_PMU_PMCR_E);
        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}

static int armv8pmu_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 & ARMV8_PMU_EVTYPE_EVENT;

        /* Always place a cycle counter into the cycle counter. */
        if (evtype == ARMV8_PMUV3_PERFCTR_CPU_CYCLES) {
                if (test_and_set_bit(ARMV8_IDX_CYCLE_COUNTER, cpuc->used_mask))
                        return -EAGAIN;

                return ARMV8_IDX_CYCLE_COUNTER;
        }

        /*
         * For anything other than a cycle counter, try and use
         * the events counters
         */
        for (idx = ARMV8_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 armv8pmu_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 (is_kernel_in_hyp_mode() &&
            attr->exclude_kernel != attr->exclude_hv)
                return -EINVAL;
        if (attr->exclude_user)
                config_base |= ARMV8_PMU_EXCLUDE_EL0;
        if (!is_kernel_in_hyp_mode() && attr->exclude_kernel)
                config_base |= ARMV8_PMU_EXCLUDE_EL1;
        if (!attr->exclude_hv)
                config_base |= ARMV8_PMU_INCLUDE_EL2;

        /*
         * Install the filter into config_base as this is used to
         * construct the event type.
         */
        event->config_base = config_base;

        return 0;
}

static void armv8pmu_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 = ARMV8_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) {
                armv8pmu_disable_counter(idx);
                armv8pmu_disable_intens(idx);
        }

        /*
         * Initialize & Reset PMNC. Request overflow interrupt for
         * 64 bit cycle counter but cheat in armv8pmu_write_counter().
         */
        armv8pmu_pmcr_write(ARMV8_PMU_PMCR_P | ARMV8_PMU_PMCR_C |
                            ARMV8_PMU_PMCR_LC);
}

static int armv8_pmuv3_map_event(struct perf_event *event)
{
        int hw_event_id;
        struct arm_pmu *armpmu = to_arm_pmu(event->pmu);

        hw_event_id = armpmu_map_event(event, &armv8_pmuv3_perf_map,
                                       &armv8_pmuv3_perf_cache_map,
                                       ARMV8_PMU_EVTYPE_EVENT);
        if (hw_event_id < 0)
                return hw_event_id;

        /* disable micro/arch events not supported by this PMU */
        if ((hw_event_id < ARMV8_PMUV3_MAX_COMMON_EVENTS) &&
                !test_bit(hw_event_id, armpmu->pmceid_bitmap)) {
                        return -EOPNOTSUPP;
        }

        return hw_event_id;
}

static int armv8_a53_map_event(struct perf_event *event)
{
        return armpmu_map_event(event, &armv8_a53_perf_map,
                                &armv8_a53_perf_cache_map,
                                ARMV8_PMU_EVTYPE_EVENT);
}

static int armv8_a57_map_event(struct perf_event *event)
{
        return armpmu_map_event(event, &armv8_a57_perf_map,
                                &armv8_a57_perf_cache_map,
                                ARMV8_PMU_EVTYPE_EVENT);
}

static int armv8_thunder_map_event(struct perf_event *event)
{
        return armpmu_map_event(event, &armv8_thunder_perf_map,
                                &armv8_thunder_perf_cache_map,
                                ARMV8_PMU_EVTYPE_EVENT);
}

static int armv8_vulcan_map_event(struct perf_event *event)
{
        return armpmu_map_event(event, &armv8_vulcan_perf_map,
                                &armv8_vulcan_perf_cache_map,
                                ARMV8_PMU_EVTYPE_EVENT);
}

static void __armv8pmu_probe_pmu(void *info)
{
        struct arm_pmu *cpu_pmu = info;
        u32 pmceid[2];

        /* Read the nb of CNTx counters supported from PMNC */
        cpu_pmu->num_events = (armv8pmu_pmcr_read() >> ARMV8_PMU_PMCR_N_SHIFT)
                & ARMV8_PMU_PMCR_N_MASK;

        /* Add the CPU cycles counter */
        cpu_pmu->num_events += 1;

        pmceid[0] = read_sysreg(pmceid0_el0);
        pmceid[1] = read_sysreg(pmceid1_el0);

        bitmap_from_u32array(cpu_pmu->pmceid_bitmap,
                             ARMV8_PMUV3_MAX_COMMON_EVENTS, pmceid,
                             ARRAY_SIZE(pmceid));
}

static int armv8pmu_probe_pmu(struct arm_pmu *cpu_pmu)
{
        return smp_call_function_any(&cpu_pmu->supported_cpus,
                                    __armv8pmu_probe_pmu,
                                    cpu_pmu, 1);
}

static void armv8_pmu_init(struct arm_pmu *cpu_pmu)
{
        cpu_pmu->handle_irq             = armv8pmu_handle_irq,
        cpu_pmu->enable                 = armv8pmu_enable_event,
        cpu_pmu->disable                = armv8pmu_disable_event,
        cpu_pmu->read_counter           = armv8pmu_read_counter,
        cpu_pmu->write_counter          = armv8pmu_write_counter,
        cpu_pmu->get_event_idx          = armv8pmu_get_event_idx,
        cpu_pmu->start                  = armv8pmu_start,
        cpu_pmu->stop                   = armv8pmu_stop,
        cpu_pmu->reset                  = armv8pmu_reset,
        cpu_pmu->max_period             = (1LLU << 32) - 1,
        cpu_pmu->set_event_filter       = armv8pmu_set_event_filter;
}

static int armv8_pmuv3_init(struct arm_pmu *cpu_pmu)
{
        armv8_pmu_init(cpu_pmu);
        cpu_pmu->name                   = "armv8_pmuv3";
        cpu_pmu->map_event              = armv8_pmuv3_map_event;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
                &armv8_pmuv3_events_attr_group;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
                &armv8_pmuv3_format_attr_group;
        return armv8pmu_probe_pmu(cpu_pmu);
}

static int armv8_a53_pmu_init(struct arm_pmu *cpu_pmu)
{
        armv8_pmu_init(cpu_pmu);
        cpu_pmu->name                   = "armv8_cortex_a53";
        cpu_pmu->map_event              = armv8_a53_map_event;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
                &armv8_pmuv3_events_attr_group;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
                &armv8_pmuv3_format_attr_group;
        return armv8pmu_probe_pmu(cpu_pmu);
}

static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu)
{
        armv8_pmu_init(cpu_pmu);
        cpu_pmu->name                   = "armv8_cortex_a57";
        cpu_pmu->map_event              = armv8_a57_map_event;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
                &armv8_pmuv3_events_attr_group;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
                &armv8_pmuv3_format_attr_group;
        return armv8pmu_probe_pmu(cpu_pmu);
}

static int armv8_a72_pmu_init(struct arm_pmu *cpu_pmu)
{
        armv8_pmu_init(cpu_pmu);
        cpu_pmu->name                   = "armv8_cortex_a72";
        cpu_pmu->map_event              = armv8_a57_map_event;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
                &armv8_pmuv3_events_attr_group;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
                &armv8_pmuv3_format_attr_group;
        return armv8pmu_probe_pmu(cpu_pmu);
}

static int armv8_thunder_pmu_init(struct arm_pmu *cpu_pmu)
{
        armv8_pmu_init(cpu_pmu);
        cpu_pmu->name                   = "armv8_cavium_thunder";
        cpu_pmu->map_event              = armv8_thunder_map_event;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
                &armv8_pmuv3_events_attr_group;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
                &armv8_pmuv3_format_attr_group;
        return armv8pmu_probe_pmu(cpu_pmu);
}

static int armv8_vulcan_pmu_init(struct arm_pmu *cpu_pmu)
{
        armv8_pmu_init(cpu_pmu);
        cpu_pmu->name                   = "armv8_brcm_vulcan";
        cpu_pmu->map_event              = armv8_vulcan_map_event;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
                &armv8_pmuv3_events_attr_group;
        cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
                &armv8_pmuv3_format_attr_group;
        return armv8pmu_probe_pmu(cpu_pmu);
}

static const struct of_device_id armv8_pmu_of_device_ids[] = {
        {.compatible = "arm,armv8-pmuv3",       .data = armv8_pmuv3_init},
        {.compatible = "arm,cortex-a53-pmu",    .data = armv8_a53_pmu_init},
        {.compatible = "arm,cortex-a57-pmu",    .data = armv8_a57_pmu_init},
        {.compatible = "arm,cortex-a72-pmu",    .data = armv8_a72_pmu_init},
        {.compatible = "cavium,thunder-pmu",    .data = armv8_thunder_pmu_init},
        {.compatible = "brcm,vulcan-pmu",       .data = armv8_vulcan_pmu_init},
        {},
};

/*
 * Non DT systems have their micro/arch events probed at run-time.
 * A fairly complete list of generic events are provided and ones that
 * aren't supported by the current PMU are disabled.
 */
static const struct pmu_probe_info armv8_pmu_probe_table[] = {
        PMU_PROBE(0, 0, armv8_pmuv3_init), /* enable all defined counters */
        { /* sentinel value */ }
};

static int armv8_pmu_device_probe(struct platform_device *pdev)
{
        if (acpi_disabled)
                return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids,
                                            NULL);

        return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids,
                                    armv8_pmu_probe_table);
}

static struct platform_driver armv8_pmu_driver = {
        .driver         = {
                .name   = ARMV8_PMU_PDEV_NAME,
                .of_match_table = armv8_pmu_of_device_ids,
        },
        .probe          = armv8_pmu_device_probe,
};

builtin_platform_driver(armv8_pmu_driver);