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_KVM_ARM_PMU 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 ready; 28 bool created; 29 bool irq_level; 30 struct irq_work overflow_work; 31 }; 32 33 #define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready) 34 #define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS) 35 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx); 36 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val); 37 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu); 38 u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1); 39 void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu); 40 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu); 41 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu); 42 void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val); 43 void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val); 44 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu); 45 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu); 46 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu); 47 void kvm_pmu_update_run(struct kvm_vcpu *vcpu); 48 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val); 49 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val); 50 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, 51 u64 select_idx); 52 bool kvm_arm_support_pmu_v3(void); 53 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 54 struct kvm_device_attr *attr); 55 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 56 struct kvm_device_attr *attr); 57 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 58 struct kvm_device_attr *attr); 59 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu); 60 #else 61 struct kvm_pmu { 62 }; 63 64 #define kvm_arm_pmu_v3_ready(v) (false) 65 #define kvm_arm_pmu_irq_initialized(v) (false) 66 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, 67 u64 select_idx) 68 { 69 return 0; 70 } 71 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, 72 u64 select_idx, u64 val) {} 73 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu) 74 { 75 return 0; 76 } 77 static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {} 78 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {} 79 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {} 80 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {} 81 static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {} 82 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {} 83 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {} 84 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu) 85 { 86 return false; 87 } 88 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {} 89 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {} 90 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {} 91 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, 92 u64 data, u64 select_idx) {} 93 static inline bool kvm_arm_support_pmu_v3(void) { return false; } 94 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 95 struct kvm_device_attr *attr) 96 { 97 return -ENXIO; 98 } 99 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 100 struct kvm_device_attr *attr) 101 { 102 return -ENXIO; 103 } 104 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 105 struct kvm_device_attr *attr) 106 { 107 return -ENXIO; 108 } 109 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu) 110 { 111 return 0; 112 } 113 static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1) 114 { 115 return 0; 116 } 117 #endif 118 119 #endif 120