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 #define ARMV8_PMU_MAX_COUNTER_PAIRS     ((ARMV8_PMU_MAX_COUNTERS + 1) >> 1)
  15
  16 #ifdef CONFIG_KVM_ARM_PMU
  17
  18 struct kvm_pmc {
  19         u8 idx; /* index into the pmu->pmc array */
  20         struct perf_event *perf_event;
  21 };
  22
  23 struct kvm_pmu {
  24         int irq_num;
  25         struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
  26         DECLARE_BITMAP(chained, ARMV8_PMU_MAX_COUNTER_PAIRS);
  27         bool ready;
  28         bool created;
  29         bool irq_level;
  30 };
  31
  32 #define kvm_arm_pmu_v3_ready(v)         ((v)->arch.pmu.ready)
  33 #define kvm_arm_pmu_irq_initialized(v)  ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
  34 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
  35 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
  36 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
  37 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
  38 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
  39 void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
  40 void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
  41 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
  42 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
  43 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
  44 void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
  45 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
  46 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
  47 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
  48                                     u64 select_idx);
  49 bool kvm_arm_support_pmu_v3(void);
  50 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  51                             struct kvm_device_attr *attr);
  52 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  53                             struct kvm_device_attr *attr);
  54 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
  55                             struct kvm_device_attr *attr);
  56 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
  57 #else
  58 struct kvm_pmu {
  59 };
  60
  61 #define kvm_arm_pmu_v3_ready(v)         (false)
  62 #define kvm_arm_pmu_irq_initialized(v)  (false)
  63 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
  64                                             u64 select_idx)
  65 {
  66         return 0;
  67 }
  68 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
  69                                              u64 select_idx, u64 val) {}
  70 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
  71 {
  72         return 0;
  73 }
  74 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
  75 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
  76 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
  77 static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
  78 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
  79 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
  80 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
  81 {
  82         return false;
  83 }
  84 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
  85 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
  86 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
  87 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
  88                                                   u64 data, u64 select_idx) {}
  89 static inline bool kvm_arm_support_pmu_v3(void) { return false; }
  90 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  91                                           struct kvm_device_attr *attr)
  92 {
  93         return -ENXIO;
  94 }
  95 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  96                                           struct kvm_device_attr *attr)
  97 {
  98         return -ENXIO;
  99 }
 100 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 101                                           struct kvm_device_attr *attr)
 102 {
 103         return -ENXIO;
 104 }
 105 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
 106 {
 107         return 0;
 108 }
 109 #endif
 110
 111 #endif