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 DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
  17
  18 static __always_inline bool kvm_arm_support_pmu_v3(void)
  19 {
  20         return static_branch_likely(&kvm_arm_pmu_available);
  21 }
  22
  23 #ifdef CONFIG_HW_PERF_EVENTS
  24
  25 struct kvm_pmc {
  26         u8 idx; /* index into the pmu->pmc array */
  27         struct perf_event *perf_event;
  28 };
  29
  30 struct kvm_pmu {
  31         int irq_num;
  32         struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
  33         DECLARE_BITMAP(chained, ARMV8_PMU_MAX_COUNTER_PAIRS);
  34         bool created;
  35         bool irq_level;
  36         struct irq_work overflow_work;
  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 int kvm_pmu_probe_pmuver(void);
  65 #else
  66 struct kvm_pmu {
  67 };
  68
  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_init(struct kvm_vcpu *vcpu) {}
  82 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
  83 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
  84 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
  85 static inline void kvm_pmu_enable_counter_mask(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 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
  89 {
  90         return false;
  91 }
  92 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
  93 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
  94 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
  95 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
  96                                                   u64 data, u64 select_idx) {}
  97 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  98                                           struct kvm_device_attr *attr)
  99 {
 100         return -ENXIO;
 101 }
 102 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
 103                                           struct kvm_device_attr *attr)
 104 {
 105         return -ENXIO;
 106 }
 107 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 108                                           struct kvm_device_attr *attr)
 109 {
 110         return -ENXIO;
 111 }
 112 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
 113 {
 114         return 0;
 115 }
 116 static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
 117 {
 118         return 0;
 119 }
 120
 121 static inline int kvm_pmu_probe_pmuver(void) { return 0xf; }
 122
 123 #endif
 124
 125 #endif