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 u64 *mask); 30 int (*is_valid_msr_idx)(struct kvm_vcpu *vcpu, unsigned idx); 31 bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr); 32 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 33 int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 34 void (*refresh)(struct kvm_vcpu *vcpu); 35 void (*init)(struct kvm_vcpu *vcpu); 36 void (*reset)(struct kvm_vcpu *vcpu); 37 }; 38 39 static inline u64 pmc_bitmask(struct kvm_pmc *pmc) 40 { 41 struct kvm_pmu *pmu = pmc_to_pmu(pmc); 42 43 return pmu->counter_bitmask[pmc->type]; 44 } 45 46 static inline u64 pmc_read_counter(struct kvm_pmc *pmc) 47 { 48 u64 counter, enabled, running; 49 50 counter = pmc->counter; 51 if (pmc->perf_event) 52 counter += perf_event_read_value(pmc->perf_event, 53 &enabled, &running); 54 /* FIXME: Scaling needed? */ 55 return counter & pmc_bitmask(pmc); 56 } 57 58 static inline void pmc_stop_counter(struct kvm_pmc *pmc) 59 { 60 if (pmc->perf_event) { 61 pmc->counter = pmc_read_counter(pmc); 62 perf_event_release_kernel(pmc->perf_event); 63 pmc->perf_event = NULL; 64 } 65 } 66 67 static inline bool pmc_is_gp(struct kvm_pmc *pmc) 68 { 69 return pmc->type == KVM_PMC_GP; 70 } 71 72 static inline bool pmc_is_fixed(struct kvm_pmc *pmc) 73 { 74 return pmc->type == KVM_PMC_FIXED; 75 } 76 77 static inline bool pmc_is_enabled(struct kvm_pmc *pmc) 78 { 79 return kvm_x86_ops->pmu_ops->pmc_is_enabled(pmc); 80 } 81 82 /* returns general purpose PMC with the specified MSR. Note that it can be 83 * used for both PERFCTRn and EVNTSELn; that is why it accepts base as a 84 * paramenter to tell them apart. 85 */ 86 static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr, 87 u32 base) 88 { 89 if (msr >= base && msr < base + pmu->nr_arch_gp_counters) 90 return &pmu->gp_counters[msr - base]; 91 92 return NULL; 93 } 94 95 /* returns fixed PMC with the specified MSR */ 96 static inline struct kvm_pmc *get_fixed_pmc(struct kvm_pmu *pmu, u32 msr) 97 { 98 int base = MSR_CORE_PERF_FIXED_CTR0; 99 100 if (msr >= base && msr < base + pmu->nr_arch_fixed_counters) 101 return &pmu->fixed_counters[msr - base]; 102 103 return NULL; 104 } 105 106 void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel); 107 void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx); 108 void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx); 109 110 void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu); 111 void kvm_pmu_handle_event(struct kvm_vcpu *vcpu); 112 int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data); 113 int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx); 114 bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr); 115 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 116 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 117 void kvm_pmu_refresh(struct kvm_vcpu *vcpu); 118 void kvm_pmu_reset(struct kvm_vcpu *vcpu); 119 void kvm_pmu_init(struct kvm_vcpu *vcpu); 120 void kvm_pmu_destroy(struct kvm_vcpu *vcpu); 121 int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp); 122 123 bool is_vmware_backdoor_pmc(u32 pmc_idx); 124 125 extern struct kvm_pmu_ops intel_pmu_ops; 126 extern struct kvm_pmu_ops amd_pmu_ops; 127 #endif /* __KVM_X86_PMU_H */ 128