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 #else
  65 struct kvm_pmu {
  66 };
  67
  68 #define kvm_arm_pmu_irq_initialized(v)  (false)
  69 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
  70                                             u64 select_idx)
  71 {
  72         return 0;
  73 }
  74 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
  75                                              u64 select_idx, u64 val) {}
  76 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
  77 {
  78         return 0;
  79 }
  80 static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
  81 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
  82 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
  83 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
  84 static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
  85 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
  86 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
  87 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
  88 {
  89         return false;
  90 }
  91 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
  92 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
  93 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
  94 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
  95                                                   u64 data, u64 select_idx) {}
  96 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  97                                           struct kvm_device_attr *attr)
  98 {
  99         return -ENXIO;
 100 }
 101 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
 102                                           struct kvm_device_attr *attr)
 103 {
 104         return -ENXIO;
 105 }
 106 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 107                                           struct kvm_device_attr *attr)
 108 {
 109         return -ENXIO;
 110 }
 111 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
 112 {
 113         return 0;
 114 }
 115 static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
 116 {
 117         return 0;
 118 }
 119
 120 #endif
 121
 122 #endif