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 18struct kvm_pmc { 19 u8 idx; /* index into the pmu->pmc array */ 20 struct perf_event *perf_event; 21}; 22 23struct 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) 35u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx); 36void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val); 37u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu); 38u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1); 39void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu); 40void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu); 41void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu); 42void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val); 43void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val); 44void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu); 45void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu); 46bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu); 47void kvm_pmu_update_run(struct kvm_vcpu *vcpu); 48void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val); 49void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val); 50void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, 51 u64 select_idx); 52bool kvm_arm_support_pmu_v3(void); 53int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 54 struct kvm_device_attr *attr); 55int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 56 struct kvm_device_attr *attr); 57int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 58 struct kvm_device_attr *attr); 59int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu); 60#else 61struct kvm_pmu { 62}; 63 64#define kvm_arm_pmu_v3_ready(v) (false) 65#define kvm_arm_pmu_irq_initialized(v) (false) 66static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, 67 u64 select_idx) 68{ 69 return 0; 70} 71static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, 72 u64 select_idx, u64 val) {} 73static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu) 74{ 75 return 0; 76} 77static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {} 78static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {} 79static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {} 80static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {} 81static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {} 82static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {} 83static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {} 84static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu) 85{ 86 return false; 87} 88static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {} 89static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {} 90static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {} 91static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, 92 u64 data, u64 select_idx) {} 93static inline bool kvm_arm_support_pmu_v3(void) { return false; } 94static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 95 struct kvm_device_attr *attr) 96{ 97 return -ENXIO; 98} 99static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 100 struct kvm_device_attr *attr) 101{ 102 return -ENXIO; 103} 104static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 105 struct kvm_device_attr *attr) 106{ 107 return -ENXIO; 108} 109static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu) 110{ 111 return 0; 112} 113static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1) 114{ 115 return 0; 116} 117#endif 118 119#endif 120