LXR linux/include/kvm/arm

   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
  28struct kvm_pmc {
  29        u8 idx; /* index into the pmu->pmc array */
  30        struct perf_event *perf_event;
  31        u64 bitmask;
  32};
  33
  34struct 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)
  43u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
  44void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
  45u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
  46void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
  47void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
  48void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
  49void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
  50void kvm_pmu_overflow_set(struct kvm_vcpu *vcpu, u64 val);
  51void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
  52void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
  53void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
  54void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
  55void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
  56                                    u64 select_idx);
  57bool kvm_arm_support_pmu_v3(void);
  58int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  59                            struct kvm_device_attr *attr);
  60int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  61                            struct kvm_device_attr *attr);
  62int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
  63                            struct kvm_device_attr *attr);
  64#else
  65struct kvm_pmu {
  66};
  67
  68#define kvm_arm_pmu_v3_ready(v)         (false)
  69#define kvm_arm_pmu_irq_initialized(v)  (false)
  70static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
  71                                            u64 select_idx)
  72{
  73        return 0;
  74}
  75static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
  76                                             u64 select_idx, u64 val) {}
  77static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
  78{
  79        return 0;
  80}
  81static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
  82static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
  83static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  84static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
  85static inline void kvm_pmu_overflow_set(struct kvm_vcpu *vcpu, u64 val) {}
  86static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
  87static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
  88static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
  89static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
  90static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
  91                                                  u64 data, u64 select_idx) {}
  92static inline bool kvm_arm_support_pmu_v3(void) { return false; }
  93static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
  94                                          struct kvm_device_attr *attr)
  95{
  96        return -ENXIO;
  97}
  98static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
  99                                          struct kvm_device_attr *attr)
 100{
 101        return -ENXIO;
 102}
 103static 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
 111