1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __KVM_X86_PMU_H
3 #define __KVM_X86_PMU_H
5 #include <linux/nospec.h>
7 #define vcpu_to_pmu(vcpu) (&(vcpu)->arch.pmu)
8 #define pmu_to_vcpu(pmu) (container_of((pmu), struct kvm_vcpu, arch.pmu))
9 #define pmc_to_pmu(pmc) (&(pmc)->vcpu->arch.pmu)
11 /* retrieve the 4 bits for EN and PMI out of IA32_FIXED_CTR_CTRL */
12 #define fixed_ctrl_field(ctrl_reg, idx) (((ctrl_reg) >> ((idx)*4)) & 0xf)
14 #define VMWARE_BACKDOOR_PMC_HOST_TSC 0x10000
15 #define VMWARE_BACKDOOR_PMC_REAL_TIME 0x10001
16 #define VMWARE_BACKDOOR_PMC_APPARENT_TIME 0x10002
18 struct kvm_event_hw_type_mapping {
25 unsigned (*find_arch_event)(struct kvm_pmu *pmu, u8 event_select,
27 unsigned (*find_fixed_event)(int idx);
28 bool (*pmc_is_enabled)(struct kvm_pmc *pmc);
29 struct kvm_pmc *(*pmc_idx_to_pmc)(struct kvm_pmu *pmu, int pmc_idx);
30 struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, unsigned idx,
32 int (*is_valid_msr_idx)(struct kvm_vcpu *vcpu, unsigned idx);
33 bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr);
34 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
35 int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
36 void (*refresh)(struct kvm_vcpu *vcpu);
37 void (*init)(struct kvm_vcpu *vcpu);
38 void (*reset)(struct kvm_vcpu *vcpu);
41 static inline u64 pmc_bitmask(struct kvm_pmc *pmc)
43 struct kvm_pmu *pmu = pmc_to_pmu(pmc);
45 return pmu->counter_bitmask[pmc->type];
48 static inline u64 pmc_read_counter(struct kvm_pmc *pmc)
50 u64 counter, enabled, running;
52 counter = pmc->counter;
54 counter += perf_event_read_value(pmc->perf_event,
56 /* FIXME: Scaling needed? */
57 return counter & pmc_bitmask(pmc);
60 static inline void pmc_stop_counter(struct kvm_pmc *pmc)
62 if (pmc->perf_event) {
63 pmc->counter = pmc_read_counter(pmc);
64 perf_event_release_kernel(pmc->perf_event);
65 pmc->perf_event = NULL;
69 static inline bool pmc_is_gp(struct kvm_pmc *pmc)
71 return pmc->type == KVM_PMC_GP;
74 static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
76 return pmc->type == KVM_PMC_FIXED;
79 static inline bool pmc_is_enabled(struct kvm_pmc *pmc)
81 return kvm_x86_ops->pmu_ops->pmc_is_enabled(pmc);
84 /* returns general purpose PMC with the specified MSR. Note that it can be
85 * used for both PERFCTRn and EVNTSELn; that is why it accepts base as a
86 * paramenter to tell them apart.
88 static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr,
91 if (msr >= base && msr < base + pmu->nr_arch_gp_counters) {
92 u32 index = array_index_nospec(msr - base,
93 pmu->nr_arch_gp_counters);
95 return &pmu->gp_counters[index];
101 /* returns fixed PMC with the specified MSR */
102 static inline struct kvm_pmc *get_fixed_pmc(struct kvm_pmu *pmu, u32 msr)
104 int base = MSR_CORE_PERF_FIXED_CTR0;
106 if (msr >= base && msr < base + pmu->nr_arch_fixed_counters) {
107 u32 index = array_index_nospec(msr - base,
108 pmu->nr_arch_fixed_counters);
110 return &pmu->fixed_counters[index];
116 void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel);
117 void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx);
118 void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx);
120 void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
121 void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
122 int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
123 int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx);
124 bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr);
125 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
126 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
127 void kvm_pmu_refresh(struct kvm_vcpu *vcpu);
128 void kvm_pmu_reset(struct kvm_vcpu *vcpu);
129 void kvm_pmu_init(struct kvm_vcpu *vcpu);
130 void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
132 bool is_vmware_backdoor_pmc(u32 pmc_idx);
134 extern struct kvm_pmu_ops intel_pmu_ops;
135 extern struct kvm_pmu_ops amd_pmu_ops;
136 #endif /* __KVM_X86_PMU_H */