1 /* 2 * Copyright (C) 2015 Linaro Ltd. 3 * Author: Shannon Zhao <shannon.zhao@linaro.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef __ASM_ARM_KVM_PMU_H 19 #define __ASM_ARM_KVM_PMU_H 20 21 #include <linux/perf_event.h> 22 #include <asm/perf_event.h> 23 24 #define ARMV8_PMU_CYCLE_IDX (ARMV8_PMU_MAX_COUNTERS - 1) 25 26 #ifdef CONFIG_KVM_ARM_PMU 27 28 struct kvm_pmc { 29 u8 idx; /* index into the pmu->pmc array */ 30 struct perf_event *perf_event; 31 u64 bitmask; 32 }; 33 34 struct kvm_pmu { 35 int irq_num; 36 struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS]; 37 bool ready; 38 bool created; 39 bool irq_level; 40 }; 41 42 #define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready) 43 #define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS) 44 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx); 45 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val); 46 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu); 47 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu); 48 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu); 49 void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val); 50 void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val); 51 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu); 52 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu); 53 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu); 54 void kvm_pmu_update_run(struct kvm_vcpu *vcpu); 55 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val); 56 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val); 57 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, 58 u64 select_idx); 59 bool kvm_arm_support_pmu_v3(void); 60 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 61 struct kvm_device_attr *attr); 62 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 63 struct kvm_device_attr *attr); 64 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 65 struct kvm_device_attr *attr); 66 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu); 67 #else 68 struct kvm_pmu { 69 }; 70 71 #define kvm_arm_pmu_v3_ready(v) (false) 72 #define kvm_arm_pmu_irq_initialized(v) (false) 73 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, 74 u64 select_idx) 75 { 76 return 0; 77 } 78 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, 79 u64 select_idx, u64 val) {} 80 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu) 81 { 82 return 0; 83 } 84 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {} 85 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {} 86 static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {} 87 static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {} 88 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {} 89 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {} 90 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu) 91 { 92 return false; 93 } 94 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {} 95 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {} 96 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {} 97 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, 98 u64 data, u64 select_idx) {} 99 static inline bool kvm_arm_support_pmu_v3(void) { return false; } 100 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 101 struct kvm_device_attr *attr) 102 { 103 return -ENXIO; 104 } 105 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 106 struct kvm_device_attr *attr) 107 { 108 return -ENXIO; 109 } 110 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 111 struct kvm_device_attr *attr) 112 { 113 return -ENXIO; 114 } 115 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu) 116 { 117 return 0; 118 } 119 #endif 120 121 #endif 122