| 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 | #ifdef CONFIG_KVM_ARM_PMU |
| 22 | |
| 23 | #include <linux/perf_event.h> |
| 24 | #include <asm/perf_event.h> |
| 25 | |
| 26 | #define ARMV8_PMU_CYCLE_IDX (ARMV8_PMU_MAX_COUNTERS - 1) |
| 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 irq_level; |
| 39 | }; |
| 40 | |
| 41 | #define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready) |
| 42 | #define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS) |
| 43 | u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx); |
| 44 | void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val); |
| 45 | u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu); |
| 46 | void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu); |
| 47 | void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu); |
| 48 | void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val); |
| 49 | void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val); |
| 50 | void kvm_pmu_overflow_set(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 | void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val); |
| 54 | void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val); |
| 55 | void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data, |
| 56 | u64 select_idx); |
| 57 | bool kvm_arm_support_pmu_v3(void); |
| 58 | int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, |
| 59 | struct kvm_device_attr *attr); |
| 60 | int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu, |
| 61 | struct kvm_device_attr *attr); |
| 62 | int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu, |
| 63 | struct kvm_device_attr *attr); |
| 64 | #else |
| 65 | struct kvm_pmu { |
| 66 | }; |
| 67 | |
| 68 | #define kvm_arm_pmu_v3_ready(v) (false) |
| 69 | #define kvm_arm_pmu_irq_initialized(v) (false) |
| 70 | static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, |
| 71 | u64 select_idx) |
| 72 | { |
| 73 | return 0; |
| 74 | } |
| 75 | static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, |
| 76 | u64 select_idx, u64 val) {} |
| 77 | static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu) |
| 78 | { |
| 79 | return 0; |
| 80 | } |
| 81 | static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {} |
| 82 | static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {} |
| 83 | static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {} |
| 84 | static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {} |
| 85 | static inline void kvm_pmu_overflow_set(struct kvm_vcpu *vcpu, u64 val) {} |
| 86 | static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {} |
| 87 | static inline void kvm_pmu_sync_hwstate(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 | #endif |
| 109 | |
| 110 | #endif |