include/kvm/arm_pmu.h

   1 /*
   2  * Copyright (C) 2015 Linaro Ltd.
   3  * Author: Shannon Zhao <shannon.zhao@linaro.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __ASM_ARM_KVM_PMU_H
  19 #define __ASM_ARM_KVM_PMU_H
  20
  21 #include <linux/perf_event.h>
  22 #include <asm/perf_event.h>
  23
  24 #define ARMV8_PMU_CYCLE_IDX             (ARMV8_PMU_MAX_COUNTERS - 1)
  25
  26 #ifdef CONFIG_KVM_ARM_PMU
  27
  28 struct kvm_pmc {
  29         u8 idx; /* index into the pmu->pmc array */
  30         struct perf_event *perf_event;
  31         u64 bitmask;
  32 };
  33
  34 struct kvm_pmu {
  35         int irq_num;
  36         struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
  37         bool ready;
  38         bool created;
  39         bool irq_level;
  40 };
  41
  42 #define kvm_arm_pmu_v3_ready(v)         ((v)->arch.pmu.ready)
  43 #define kvm_arm_pmu_irq_initialized(v)  ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
  44 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
  45 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
  46 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
  47 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
  48 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
  49 void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
  50 void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
  51 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
  52 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
  53 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
  54 void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
  55 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
  56 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
  57 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
  58                                     u64 select_idx);
  59 bool kvm_arm_support_pmu_v3(void);
  60 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  61                             struct kvm_device_attr *attr);
  62 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  63                             struct kvm_device_attr *attr);
  64 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
  65                             struct kvm_device_attr *attr);
  66 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
  67 #else
  68 struct kvm_pmu {
  69 };
  70
  71 #define kvm_arm_pmu_v3_ready(v)         (false)
  72 #define kvm_arm_pmu_irq_initialized(v)  (false)
  73 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
  74                                             u64 select_idx)
  75 {
  76         return 0;
  77 }
  78 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
  79                                              u64 select_idx, u64 val) {}
  80 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
  81 {
  82         return 0;
  83 }
  84 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
  85 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
  86 static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  87 static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  88 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
  89 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
  90 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
  91 {
  92         return false;
  93 }
  94 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
  95 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
  96 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
  97 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
  98                                                   u64 data, u64 select_idx) {}
  99 static inline bool kvm_arm_support_pmu_v3(void) { return false; }
 100 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
 101                                           struct kvm_device_attr *attr)
 102 {
 103         return -ENXIO;
 104 }
 105 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
 106                                           struct kvm_device_attr *attr)
 107 {
 108         return -ENXIO;
 109 }
 110 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 111                                           struct kvm_device_attr *attr)
 112 {
 113         return -ENXIO;
 114 }
 115 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
 116 {
 117         return 0;
 118 }
 119 #endif
 120
 121 #endif