1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2015 Linaro Ltd. 4 * Author: Shannon Zhao <shannon.zhao@linaro.org> 5 */ 6 7 #ifndef __ASM_ARM_KVM_PMU_H 8 #define __ASM_ARM_KVM_PMU_H 9 10 #include <linux/perf_event.h> 11 #include <asm/perf_event.h> 12 13 #define ARMV8_PMU_CYCLE_IDX (ARMV8_PMU_MAX_COUNTERS - 1) 14 #define ARMV8_PMU_MAX_COUNTER_PAIRS ((ARMV8_PMU_MAX_COUNTERS + 1) >> 1) 15 16 #ifdef CONFIG_HW_PERF_EVENTS 17 18 struct kvm_pmc { 19 u8 idx; /* index into the pmu->pmc array */ 20 struct perf_event *perf_event; 21 }; 22 23 struct kvm_pmu { 24 int irq_num; 25 struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS]; 26 DECLARE_BITMAP(chained, ARMV8_PMU_MAX_COUNTER_PAIRS); 27 bool created; 28 bool irq_level; 29 struct irq_work overflow_work; 30 }; 31 32 #define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS) 33 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx); 34 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val); 35 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu); 36 u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1); 37 void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu); 38 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu); 39 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu); 40 void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val); 41 void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val); 42 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu); 43 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu); 44 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu); 45 void kvm_pmu_update_run(struct kvm_vcpu *vcpu); 46 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val); 47 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val); 48 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, 49 u64 select_idx); 50 bool kvm_arm_support_pmu_v3(void); 51 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 52 struct kvm_device_attr *attr); 53 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 54 struct kvm_device_attr *attr); 55 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 56 struct kvm_device_attr *attr); 57 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu); 58 #else 59 struct kvm_pmu { 60 }; 61 62 #define kvm_arm_pmu_irq_initialized(v) (false) 63 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, 64 u64 select_idx) 65 { 66 return 0; 67 } 68 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, 69 u64 select_idx, u64 val) {} 70 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu) 71 { 72 return 0; 73 } 74 static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {} 75 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {} 76 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {} 77 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {} 78 static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {} 79 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {} 80 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {} 81 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu) 82 { 83 return false; 84 } 85 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {} 86 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {} 87 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {} 88 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, 89 u64 data, u64 select_idx) {} 90 static inline bool kvm_arm_support_pmu_v3(void) { return false; } 91 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 92 struct kvm_device_attr *attr) 93 { 94 return -ENXIO; 95 } 96 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 97 struct kvm_device_attr *attr) 98 { 99 return -ENXIO; 100 } 101 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 102 struct kvm_device_attr *attr) 103 { 104 return -ENXIO; 105 } 106 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu) 107 { 108 return 0; 109 } 110 static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1) 111 { 112 return 0; 113 } 114 #endif 115 116 #endif 117