arch/x86/kvm/pmu.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __KVM_X86_PMU_H
   3 #define __KVM_X86_PMU_H
   4
   5 #define vcpu_to_pmu(vcpu) (&(vcpu)->arch.pmu)
   6 #define pmu_to_vcpu(pmu)  (container_of((pmu), struct kvm_vcpu, arch.pmu))
   7 #define pmc_to_pmu(pmc)   (&(pmc)->vcpu->arch.pmu)
   8
   9 /* retrieve the 4 bits for EN and PMI out of IA32_FIXED_CTR_CTRL */
  10 #define fixed_ctrl_field(ctrl_reg, idx) (((ctrl_reg) >> ((idx)*4)) & 0xf)
  11
  12 #define VMWARE_BACKDOOR_PMC_HOST_TSC            0x10000
  13 #define VMWARE_BACKDOOR_PMC_REAL_TIME           0x10001
  14 #define VMWARE_BACKDOOR_PMC_APPARENT_TIME       0x10002
  15
  16 struct kvm_event_hw_type_mapping {
  17         u8 eventsel;
  18         u8 unit_mask;
  19         unsigned event_type;
  20 };
  21
  22 struct kvm_pmu_ops {
  23         unsigned (*find_arch_event)(struct kvm_pmu *pmu, u8 event_select,
  24                                     u8 unit_mask);
  25         unsigned (*find_fixed_event)(int idx);
  26         bool (*pmc_is_enabled)(struct kvm_pmc *pmc);
  27         struct kvm_pmc *(*pmc_idx_to_pmc)(struct kvm_pmu *pmu, int pmc_idx);
  28         struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, unsigned idx);
  29         int (*is_valid_msr_idx)(struct kvm_vcpu *vcpu, unsigned idx);
  30         bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr);
  31         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  32         int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
  33         void (*refresh)(struct kvm_vcpu *vcpu);
  34         void (*init)(struct kvm_vcpu *vcpu);
  35         void (*reset)(struct kvm_vcpu *vcpu);
  36 };
  37
  38 static inline u64 pmc_bitmask(struct kvm_pmc *pmc)
  39 {
  40         struct kvm_pmu *pmu = pmc_to_pmu(pmc);
  41
  42         return pmu->counter_bitmask[pmc->type];
  43 }
  44
  45 static inline u64 pmc_read_counter(struct kvm_pmc *pmc)
  46 {
  47         u64 counter, enabled, running;
  48
  49         counter = pmc->counter;
  50         if (pmc->perf_event)
  51                 counter += perf_event_read_value(pmc->perf_event,
  52                                                  &enabled, &running);
  53         /* FIXME: Scaling needed? */
  54         return counter & pmc_bitmask(pmc);
  55 }
  56
  57 static inline void pmc_stop_counter(struct kvm_pmc *pmc)
  58 {
  59         if (pmc->perf_event) {
  60                 pmc->counter = pmc_read_counter(pmc);
  61                 perf_event_release_kernel(pmc->perf_event);
  62                 pmc->perf_event = NULL;
  63         }
  64 }
  65
  66 static inline bool pmc_is_gp(struct kvm_pmc *pmc)
  67 {
  68         return pmc->type == KVM_PMC_GP;
  69 }
  70
  71 static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
  72 {
  73         return pmc->type == KVM_PMC_FIXED;
  74 }
  75
  76 static inline bool pmc_is_enabled(struct kvm_pmc *pmc)
  77 {
  78         return kvm_x86_ops->pmu_ops->pmc_is_enabled(pmc);
  79 }
  80
  81 /* returns general purpose PMC with the specified MSR. Note that it can be
  82  * used for both PERFCTRn and EVNTSELn; that is why it accepts base as a
  83  * paramenter to tell them apart.
  84  */
  85 static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr,
  86                                          u32 base)
  87 {
  88         if (msr >= base && msr < base + pmu->nr_arch_gp_counters)
  89                 return &pmu->gp_counters[msr - base];
  90
  91         return NULL;
  92 }
  93
  94 /* returns fixed PMC with the specified MSR */
  95 static inline struct kvm_pmc *get_fixed_pmc(struct kvm_pmu *pmu, u32 msr)
  96 {
  97         int base = MSR_CORE_PERF_FIXED_CTR0;
  98
  99         if (msr >= base && msr < base + pmu->nr_arch_fixed_counters)
 100                 return &pmu->fixed_counters[msr - base];
 101
 102         return NULL;
 103 }
 104
 105 void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel);
 106 void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx);
 107 void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx);
 108
 109 void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
 110 void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
 111 int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
 112 int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx);
 113 bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr);
 114 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
 115 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
 116 void kvm_pmu_refresh(struct kvm_vcpu *vcpu);
 117 void kvm_pmu_reset(struct kvm_vcpu *vcpu);
 118 void kvm_pmu_init(struct kvm_vcpu *vcpu);
 119 void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
 120
 121 bool is_vmware_backdoor_pmc(u32 pmc_idx);
 122
 123 extern struct kvm_pmu_ops intel_pmu_ops;
 124 extern struct kvm_pmu_ops amd_pmu_ops;
 125 #endif /* __KVM_X86_PMU_H */