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TOMOYO Linux Cross Reference
Linux/include/kvm/arm_pmu.h

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  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 

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