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 #ifdef CONFIG_KVM_ARM_PMU
  22
  23 #include <linux/perf_event.h>
  24 #include <asm/perf_event.h>
  25
  26 #define ARMV8_PMU_CYCLE_IDX             (ARMV8_PMU_MAX_COUNTERS - 1)
  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 irq_level;
  39 };
  40
  41 #define kvm_arm_pmu_v3_ready(v)         ((v)->arch.pmu.ready)
  42 #define kvm_arm_pmu_irq_initialized(v)  ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
  43 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
  44 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
  45 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
  46 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
  47 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
  48 void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
  49 void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
  50 void kvm_pmu_overflow_set(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 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 bool kvm_arm_support_pmu_v3(void);
  58 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  59                             struct kvm_device_attr *attr);
  60 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  61                             struct kvm_device_attr *attr);
  62 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
  63                             struct kvm_device_attr *attr);
  64 #else
  65 struct kvm_pmu {
  66 };
  67
  68 #define kvm_arm_pmu_v3_ready(v)         (false)
  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_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(struct kvm_vcpu *vcpu, u64 val) {}
  84 static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  85 static inline void kvm_pmu_overflow_set(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 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 #endif
 109
 110 #endif