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 };
  39
  40 #define kvm_arm_pmu_v3_ready(v)         ((v)->arch.pmu.ready)
  41 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
  42 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
  43 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
  44 void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
  45 void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
  46 #else
  47 struct kvm_pmu {
  48 };
  49
  50 #define kvm_arm_pmu_v3_ready(v)         (false)
  51 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
  52                                             u64 select_idx)
  53 {
  54         return 0;
  55 }
  56 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
  57                                              u64 select_idx, u64 val) {}
  58 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
  59 {
  60         return 0;
  61 }
  62 static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  63 static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  64 #endif
  65
  66 #endif