include/kvm/arm_pmu.h

   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
  15 #ifdef CONFIG_KVM_ARM_PMU
  16
  17 struct kvm_pmc {
  18         u8 idx; /* index into the pmu->pmc array */
  19         struct perf_event *perf_event;
  20         u64 bitmask;
  21 };
  22
  23 struct kvm_pmu {
  24         int irq_num;
  25         struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
  26         bool ready;
  27         bool created;
  28         bool irq_level;
  29 };
  30
  31 #define kvm_arm_pmu_v3_ready(v)         ((v)->arch.pmu.ready)
  32 #define kvm_arm_pmu_irq_initialized(v)  ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
  33 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
  34 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
  35 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
  36 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
  37 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
  38 void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
  39 void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
  40 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
  41 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
  42 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
  43 void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
  44 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
  45 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
  46 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
  47                                     u64 select_idx);
  48 bool kvm_arm_support_pmu_v3(void);
  49 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  50                             struct kvm_device_attr *attr);
  51 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  52                             struct kvm_device_attr *attr);
  53 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
  54                             struct kvm_device_attr *attr);
  55 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
  56 #else
  57 struct kvm_pmu {
  58 };
  59
  60 #define kvm_arm_pmu_v3_ready(v)         (false)
  61 #define kvm_arm_pmu_irq_initialized(v)  (false)
  62 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
  63                                             u64 select_idx)
  64 {
  65         return 0;
  66 }
  67 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
  68                                              u64 select_idx, u64 val) {}
  69 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
  70 {
  71         return 0;
  72 }
  73 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
  74 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
  75 static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  76 static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  77 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
  78 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
  79 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
  80 {
  81         return false;
  82 }
  83 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
  84 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
  85 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
  86 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
  87                                                   u64 data, u64 select_idx) {}
  88 static inline bool kvm_arm_support_pmu_v3(void) { return false; }
  89 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  90                                           struct kvm_device_attr *attr)
  91 {
  92         return -ENXIO;
  93 }
  94 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  95                                           struct kvm_device_attr *attr)
  96 {
  97         return -ENXIO;
  98 }
  99 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 100                                           struct kvm_device_attr *attr)
 101 {
 102         return -ENXIO;
 103 }
 104 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
 105 {
 106         return 0;
 107 }
 108 #endif
 109
 110 #endif