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