LXR linux/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
  11struct kvm_event_hw_type_mapping {
  12        u8 eventsel;
  13        u8 unit_mask;
  14        unsigned event_type;
  15};
  16
  17struct 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
  33static 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
  40static 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
  52static 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
  61static inline bool pmc_is_gp(struct kvm_pmc *pmc)
  62{
  63        return pmc->type == KVM_PMC_GP;
  64}
  65
  66static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
  67{
  68        return pmc->type == KVM_PMC_FIXED;
  69}
  70
  71static 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 */
  80static 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 */
  90static 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
 100void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel);
 101void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx);
 102void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx);
 103
 104void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
 105void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
 106int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
 107int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx);
 108bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr);
 109int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
 110int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
 111void kvm_pmu_refresh(struct kvm_vcpu *vcpu);
 112void kvm_pmu_reset(struct kvm_vcpu *vcpu);
 113void kvm_pmu_init(struct kvm_vcpu *vcpu);
 114void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
 115
 116extern struct kvm_pmu_ops intel_pmu_ops;
 117extern struct kvm_pmu_ops amd_pmu_ops;
 118#endif /* __KVM_X86_PMU_H */
 119