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linux/arch/arm64/kernel/perf_event.c
Wei Huang b112c84a6f KVM: arm64: Fix the issues when guest PMCCFILTR is configured 
KVM calls kvm_pmu_set_counter_event_type() when PMCCFILTR is configured.
But this function can't deals with PMCCFILTR correctly because the evtCount
bits of PMCCFILTR, which is reserved 0, conflits with the SW_INCR event
type of other PMXEVTYPER<n> registers. To fix it, when eventsel == 0, this
function shouldn't return immediately; instead it needs to check further
if select_idx is ARMV8_PMU_CYCLE_IDX.

Another issue is that KVM shouldn't copy the eventsel bits of PMCCFILTER
blindly to attr.config. Instead it ought to convert the request to the
"cpu cycle" event type (i.e. 0x11).

To support this patch and to prevent duplicated definitions, a limited
set of ARMv8 perf event types were relocated from perf_event.c to
asm/perf_event.h.

Cc: stable@vger.kernel.org # 4.6+
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Wei Huang <wei@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-11-18 09:06:58 +00:00

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/*
* 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);
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