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
pmc_bitmask(struct kvm_pmc * pmc)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
pmc_read_counter(struct kvm_pmc * pmc)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
pmc_stop_counter(struct kvm_pmc * pmc)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
pmc_is_gp(struct kvm_pmc * pmc)67 static inline bool pmc_is_gp(struct kvm_pmc *pmc)
68 {
69 return pmc->type == KVM_PMC_GP;
70 }
71
pmc_is_fixed(struct kvm_pmc * pmc)72 static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
73 {
74 return pmc->type == KVM_PMC_FIXED;
75 }
76
pmc_is_enabled(struct kvm_pmc * pmc)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 */
get_gp_pmc(struct kvm_pmu * pmu,u32 msr,u32 base)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 */
get_fixed_pmc(struct kvm_pmu * pmu,u32 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
