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 *(*rdpmc_ecx_to_pmc)(struct kvm_vcpu *vcpu, 29 unsigned int idx, u64 *mask); 30 struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, u32 msr); 31 int (*is_valid_rdpmc_ecx)(struct kvm_vcpu *vcpu, unsigned int idx); 32 bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr); 33 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 34 int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 35 void (*refresh)(struct kvm_vcpu *vcpu); 36 void (*init)(struct kvm_vcpu *vcpu); 37 void (*reset)(struct kvm_vcpu *vcpu); 38 }; 39 40 static inline u64 pmc_bitmask(struct kvm_pmc *pmc) 41 { 42 struct kvm_pmu *pmu = pmc_to_pmu(pmc); 43 44 return pmu->counter_bitmask[pmc->type]; 45 } 46 47 static inline u64 pmc_read_counter(struct kvm_pmc *pmc) 48 { 49 u64 counter, enabled, running; 50 51 counter = pmc->counter; 52 if (pmc->perf_event) 53 counter += perf_event_read_value(pmc->perf_event, 54 &enabled, &running); 55 /* FIXME: Scaling needed? */ 56 return counter & pmc_bitmask(pmc); 57 } 58 59 static inline void pmc_release_perf_event(struct kvm_pmc *pmc) 60 { 61 if (pmc->perf_event) { 62 perf_event_release_kernel(pmc->perf_event); 63 pmc->perf_event = NULL; 64 pmc->current_config = 0; 65 pmc_to_pmu(pmc)->event_count--; 66 } 67 } 68 69 static inline void pmc_stop_counter(struct kvm_pmc *pmc) 70 { 71 if (pmc->perf_event) { 72 pmc->counter = pmc_read_counter(pmc); 73 pmc_release_perf_event(pmc); 74 } 75 } 76 77 static inline bool pmc_is_gp(struct kvm_pmc *pmc) 78 { 79 return pmc->type == KVM_PMC_GP; 80 } 81 82 static inline bool pmc_is_fixed(struct kvm_pmc *pmc) 83 { 84 return pmc->type == KVM_PMC_FIXED; 85 } 86 87 static inline bool pmc_is_enabled(struct kvm_pmc *pmc) 88 { 89 return kvm_x86_ops->pmu_ops->pmc_is_enabled(pmc); 90 } 91 92 static inline bool kvm_valid_perf_global_ctrl(struct kvm_pmu *pmu, 93 u64 data) 94 { 95 return !(pmu->global_ctrl_mask & data); 96 } 97 98 /* returns general purpose PMC with the specified MSR. Note that it can be 99 * used for both PERFCTRn and EVNTSELn; that is why it accepts base as a 100 * paramenter to tell them apart. 101 */ 102 static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr, 103 u32 base) 104 { 105 if (msr >= base && msr < base + pmu->nr_arch_gp_counters) 106 return &pmu->gp_counters[msr - base]; 107 108 return NULL; 109 } 110 111 /* returns fixed PMC with the specified MSR */ 112 static inline struct kvm_pmc *get_fixed_pmc(struct kvm_pmu *pmu, u32 msr) 113 { 114 int base = MSR_CORE_PERF_FIXED_CTR0; 115 116 if (msr >= base && msr < base + pmu->nr_arch_fixed_counters) 117 return &pmu->fixed_counters[msr - base]; 118 119 return NULL; 120 } 121 122 void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel); 123 void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx); 124 void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx); 125 126 void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu); 127 void kvm_pmu_handle_event(struct kvm_vcpu *vcpu); 128 int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data); 129 int kvm_pmu_is_valid_rdpmc_ecx(struct kvm_vcpu *vcpu, unsigned int idx); 130 bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr); 131 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 132 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 133 void kvm_pmu_refresh(struct kvm_vcpu *vcpu); 134 void kvm_pmu_reset(struct kvm_vcpu *vcpu); 135 void kvm_pmu_init(struct kvm_vcpu *vcpu); 136 void kvm_pmu_cleanup(struct kvm_vcpu *vcpu); 137 void kvm_pmu_destroy(struct kvm_vcpu *vcpu); 138 int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp); 139 140 bool is_vmware_backdoor_pmc(u32 pmc_idx); 141 142 extern struct kvm_pmu_ops intel_pmu_ops; 143 extern struct kvm_pmu_ops amd_pmu_ops; 144 #endif /* __KVM_X86_PMU_H */ 145