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_overflow_set(struct kvm_vcpu *vcpu, u64 val); 52 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu); 53 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu); 54 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu); 55 void kvm_pmu_update_run(struct kvm_vcpu *vcpu); 56 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val); 57 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val); 58 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, 59 u64 select_idx); 60 bool kvm_arm_support_pmu_v3(void); 61 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 62 struct kvm_device_attr *attr); 63 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 64 struct kvm_device_attr *attr); 65 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 66 struct kvm_device_attr *attr); 67 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu); 68 #else 69 struct kvm_pmu { 70 }; 71 72 #define kvm_arm_pmu_v3_ready(v) (false) 73 #define kvm_arm_pmu_irq_initialized(v) (false) 74 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, 75 u64 select_idx) 76 { 77 return 0; 78 } 79 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, 80 u64 select_idx, u64 val) {} 81 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu) 82 { 83 return 0; 84 } 85 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {} 86 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {} 87 static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {} 88 static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {} 89 static inline void kvm_pmu_overflow_set(struct kvm_vcpu *vcpu, u64 val) {} 90 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {} 91 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {} 92 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu) 93 { 94 return false; 95 } 96 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {} 97 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {} 98 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {} 99 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, 100 u64 data, u64 select_idx) {} 101 static inline bool kvm_arm_support_pmu_v3(void) { return false; } 102 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, 103 struct kvm_device_attr *attr) 104 { 105 return -ENXIO; 106 } 107 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, 108 struct kvm_device_attr *attr) 109 { 110 return -ENXIO; 111 } 112 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, 113 struct kvm_device_attr *attr) 114 { 115 return -ENXIO; 116 } 117 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu) 118 { 119 return 0; 120 } 121 #endif 122 123 #endif 124