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         struct irq_work overflow_work;
  31 };
  32
  33 #define kvm_arm_pmu_v3_ready(v)         ((v)->arch.pmu.ready)
  34 #define kvm_arm_pmu_irq_initialized(v)  ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
  35 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
  36 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
  37 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
  38 void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
  39 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
  40 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
  41 void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
  42 void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
  43 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
  44 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
  45 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
  46 void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
  47 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
  48 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
  49 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
  50                                     u64 select_idx);
  51 bool kvm_arm_support_pmu_v3(void);
  52 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  53                             struct kvm_device_attr *attr);
  54 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  55                             struct kvm_device_attr *attr);
  56 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
  57                             struct kvm_device_attr *attr);
  58 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
  59 #else
  60 struct kvm_pmu {
  61 };
  62
  63 #define kvm_arm_pmu_v3_ready(v)         (false)
  64 #define kvm_arm_pmu_irq_initialized(v)  (false)
  65 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
  66                                             u64 select_idx)
  67 {
  68         return 0;
  69 }
  70 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
  71                                              u64 select_idx, u64 val) {}
  72 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
  73 {
  74         return 0;
  75 }
  76 static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
  77 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
  78 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
  79 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
  80 static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
  81 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
  82 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
  83 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
  84 {
  85         return false;
  86 }
  87 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
  88 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
  89 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
  90 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
  91                                                   u64 data, u64 select_idx) {}
  92 static inline bool kvm_arm_support_pmu_v3(void) { return false; }
  93 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  94                                           struct kvm_device_attr *attr)
  95 {
  96         return -ENXIO;
  97 }
  98 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  99                                           struct kvm_device_attr *attr)
 100 {
 101         return -ENXIO;
 102 }
 103 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 104                                           struct kvm_device_attr *attr)
 105 {
 106         return -ENXIO;
 107 }
 108 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
 109 {
 110         return 0;
 111 }
 112 #endif
 113
 114 #endif