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_HW_PERF_EVENTS
  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 created;
  28         bool irq_level;
  29         struct irq_work overflow_work;
  30 };
  31
  32 DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
  33
  34 static __always_inline bool kvm_arm_support_pmu_v3(void)
  35 {
  36         return static_branch_likely(&kvm_arm_pmu_available);
  37 }
  38
  39 #define kvm_arm_pmu_irq_initialized(v)  ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
  40 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
  41 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
  42 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
  43 u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1);
  44 void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
  45 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
  46 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
  47 void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
  48 void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
  49 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
  50 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
  51 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
  52 void kvm_pmu_update_run(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 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  58                             struct kvm_device_attr *attr);
  59 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  60                             struct kvm_device_attr *attr);
  61 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
  62                             struct kvm_device_attr *attr);
  63 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
  64 #else
  65 struct kvm_pmu {
  66 };
  67
  68 static inline bool kvm_arm_support_pmu_v3(void)
  69 {
  70         return false;
  71 }
  72
  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_init(struct kvm_vcpu *vcpu) {}
  86 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
  87 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
  88 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
  89 static inline void kvm_pmu_enable_counter_mask(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 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
 102                                           struct kvm_device_attr *attr)
 103 {
 104         return -ENXIO;
 105 }
 106 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
 107                                           struct kvm_device_attr *attr)
 108 {
 109         return -ENXIO;
 110 }
 111 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 112                                           struct kvm_device_attr *attr)
 113 {
 114         return -ENXIO;
 115 }
 116 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
 117 {
 118         return 0;
 119 }
 120 static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
 121 {
 122         return 0;
 123 }
 124
 125 #endif
 126
 127 #endif