arch/x86/kvm/pmu.h

   1 #ifndef __KVM_X86_PMU_H
   2 #define __KVM_X86_PMU_H
   3
   4 #define vcpu_to_pmu(vcpu) (&(vcpu)->arch.pmu)
   5 #define pmu_to_vcpu(pmu)  (container_of((pmu), struct kvm_vcpu, arch.pmu))
   6 #define pmc_to_pmu(pmc)   (&(pmc)->vcpu->arch.pmu)
   7
   8 /* retrieve the 4 bits for EN and PMI out of IA32_FIXED_CTR_CTRL */
   9 #define fixed_ctrl_field(ctrl_reg, idx) (((ctrl_reg) >> ((idx)*4)) & 0xf)
  10
  11 struct kvm_event_hw_type_mapping {
  12         u8 eventsel;
  13         u8 unit_mask;
  14         unsigned event_type;
  15 };
  16
  17 struct kvm_pmu_ops {
  18         unsigned (*find_arch_event)(struct kvm_pmu *pmu, u8 event_select,
  19                                     u8 unit_mask);
  20         unsigned (*find_fixed_event)(int idx);
  21         bool (*pmc_is_enabled)(struct kvm_pmc *pmc);
  22         struct kvm_pmc *(*pmc_idx_to_pmc)(struct kvm_pmu *pmu, int pmc_idx);
  23         struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, unsigned idx);
  24         int (*is_valid_msr_idx)(struct kvm_vcpu *vcpu, unsigned idx);
  25         bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr);
  26         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  27         int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
  28         void (*refresh)(struct kvm_vcpu *vcpu);
  29         void (*init)(struct kvm_vcpu *vcpu);
  30         void (*reset)(struct kvm_vcpu *vcpu);
  31 };
  32
  33 static inline u64 pmc_bitmask(struct kvm_pmc *pmc)
  34 {
  35         struct kvm_pmu *pmu = pmc_to_pmu(pmc);
  36
  37         return pmu->counter_bitmask[pmc->type];
  38 }
  39
  40 static inline u64 pmc_read_counter(struct kvm_pmc *pmc)
  41 {
  42         u64 counter, enabled, running;
  43
  44         counter = pmc->counter;
  45         if (pmc->perf_event)
  46                 counter += perf_event_read_value(pmc->perf_event,
  47                                                  &enabled, &running);
  48         /* FIXME: Scaling needed? */
  49         return counter & pmc_bitmask(pmc);
  50 }
  51
  52 static inline void pmc_stop_counter(struct kvm_pmc *pmc)
  53 {
  54         if (pmc->perf_event) {
  55                 pmc->counter = pmc_read_counter(pmc);
  56                 perf_event_release_kernel(pmc->perf_event);
  57                 pmc->perf_event = NULL;
  58         }
  59 }
  60
  61 static inline bool pmc_is_gp(struct kvm_pmc *pmc)
  62 {
  63         return pmc->type == KVM_PMC_GP;
  64 }
  65
  66 static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
  67 {
  68         return pmc->type == KVM_PMC_FIXED;
  69 }
  70
  71 static inline bool pmc_is_enabled(struct kvm_pmc *pmc)
  72 {
  73         return kvm_x86_ops->pmu_ops->pmc_is_enabled(pmc);
  74 }
  75
  76 /* returns general purpose PMC with the specified MSR. Note that it can be
  77  * used for both PERFCTRn and EVNTSELn; that is why it accepts base as a
  78  * paramenter to tell them apart.
  79  */
  80 static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr,
  81                                          u32 base)
  82 {
  83         if (msr >= base && msr < base + pmu->nr_arch_gp_counters)
  84                 return &pmu->gp_counters[msr - base];
  85
  86         return NULL;
  87 }
  88
  89 /* returns fixed PMC with the specified MSR */
  90 static inline struct kvm_pmc *get_fixed_pmc(struct kvm_pmu *pmu, u32 msr)
  91 {
  92         int base = MSR_CORE_PERF_FIXED_CTR0;
  93
  94         if (msr >= base && msr < base + pmu->nr_arch_fixed_counters)
  95                 return &pmu->fixed_counters[msr - base];
  96
  97         return NULL;
  98 }
  99
 100 void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel);
 101 void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx);
 102 void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx);
 103
 104 void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
 105 void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
 106 int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
 107 int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx);
 108 bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr);
 109 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
 110 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
 111 void kvm_pmu_refresh(struct kvm_vcpu *vcpu);
 112 void kvm_pmu_reset(struct kvm_vcpu *vcpu);
 113 void kvm_pmu_init(struct kvm_vcpu *vcpu);
 114 void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
 115
 116 extern struct kvm_pmu_ops intel_pmu_ops;
 117 extern struct kvm_pmu_ops amd_pmu_ops;
 118 #endif /* __KVM_X86_PMU_H */