1
2#ifndef __KVM_X86_PMU_H
3#define __KVM_X86_PMU_H
4
5#include <linux/nospec.h>
6
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)
10
11
12#define fixed_ctrl_field(ctrl_reg, idx) (((ctrl_reg) >> ((idx)*4)) & 0xf)
13
14#define VMWARE_BACKDOOR_PMC_HOST_TSC 0x10000
15#define VMWARE_BACKDOOR_PMC_REAL_TIME 0x10001
16#define VMWARE_BACKDOOR_PMC_APPARENT_TIME 0x10002
17
18#define MAX_FIXED_COUNTERS 3
19
20struct kvm_event_hw_type_mapping {
21 u8 eventsel;
22 u8 unit_mask;
23 unsigned event_type;
24};
25
26struct kvm_pmu_ops {
27 unsigned (*find_arch_event)(struct kvm_pmu *pmu, u8 event_select,
28 u8 unit_mask);
29 unsigned (*find_fixed_event)(int idx);
30 bool (*pmc_is_enabled)(struct kvm_pmc *pmc);
31 struct kvm_pmc *(*pmc_idx_to_pmc)(struct kvm_pmu *pmu, int pmc_idx);
32 struct kvm_pmc *(*rdpmc_ecx_to_pmc)(struct kvm_vcpu *vcpu,
33 unsigned int idx, u64 *mask);
34 struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, u32 msr);
35 int (*is_valid_rdpmc_ecx)(struct kvm_vcpu *vcpu, unsigned int idx);
36 bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr);
37 int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
38 int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
39 void (*refresh)(struct kvm_vcpu *vcpu);
40 void (*init)(struct kvm_vcpu *vcpu);
41 void (*reset)(struct kvm_vcpu *vcpu);
42};
43
44static inline u64 pmc_bitmask(struct kvm_pmc *pmc)
45{
46 struct kvm_pmu *pmu = pmc_to_pmu(pmc);
47
48 return pmu->counter_bitmask[pmc->type];
49}
50
51static inline u64 pmc_read_counter(struct kvm_pmc *pmc)
52{
53 u64 counter, enabled, running;
54
55 counter = pmc->counter;
56 if (pmc->perf_event)
57 counter += perf_event_read_value(pmc->perf_event,
58 &enabled, &running);
59
60 return counter & pmc_bitmask(pmc);
61}
62
63static inline void pmc_release_perf_event(struct kvm_pmc *pmc)
64{
65 if (pmc->perf_event) {
66 perf_event_release_kernel(pmc->perf_event);
67 pmc->perf_event = NULL;
68 pmc->current_config = 0;
69 pmc_to_pmu(pmc)->event_count--;
70 }
71}
72
73static inline void pmc_stop_counter(struct kvm_pmc *pmc)
74{
75 if (pmc->perf_event) {
76 pmc->counter = pmc_read_counter(pmc);
77 pmc_release_perf_event(pmc);
78 }
79}
80
81static inline bool pmc_is_gp(struct kvm_pmc *pmc)
82{
83 return pmc->type == KVM_PMC_GP;
84}
85
86static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
87{
88 return pmc->type == KVM_PMC_FIXED;
89}
90
91static inline bool pmc_is_enabled(struct kvm_pmc *pmc)
92{
93 return kvm_x86_ops.pmu_ops->pmc_is_enabled(pmc);
94}
95
96static inline bool kvm_valid_perf_global_ctrl(struct kvm_pmu *pmu,
97 u64 data)
98{
99 return !(pmu->global_ctrl_mask & data);
100}
101
102
103
104
105
106static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr,
107 u32 base)
108{
109 if (msr >= base && msr < base + pmu->nr_arch_gp_counters) {
110 u32 index = array_index_nospec(msr - base,
111 pmu->nr_arch_gp_counters);
112
113 return &pmu->gp_counters[index];
114 }
115
116 return NULL;
117}
118
119
120static inline struct kvm_pmc *get_fixed_pmc(struct kvm_pmu *pmu, u32 msr)
121{
122 int base = MSR_CORE_PERF_FIXED_CTR0;
123
124 if (msr >= base && msr < base + pmu->nr_arch_fixed_counters) {
125 u32 index = array_index_nospec(msr - base,
126 pmu->nr_arch_fixed_counters);
127
128 return &pmu->fixed_counters[index];
129 }
130
131 return NULL;
132}
133
134static inline u64 get_sample_period(struct kvm_pmc *pmc, u64 counter_value)
135{
136 u64 sample_period = (-counter_value) & pmc_bitmask(pmc);
137
138 if (!sample_period)
139 sample_period = pmc_bitmask(pmc) + 1;
140 return sample_period;
141}
142
143void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel);
144void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx);
145void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx);
146
147void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
148void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
149int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
150int kvm_pmu_is_valid_rdpmc_ecx(struct kvm_vcpu *vcpu, unsigned int idx);
151bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr);
152int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
153int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
154void kvm_pmu_refresh(struct kvm_vcpu *vcpu);
155void kvm_pmu_reset(struct kvm_vcpu *vcpu);
156void kvm_pmu_init(struct kvm_vcpu *vcpu);
157void kvm_pmu_cleanup(struct kvm_vcpu *vcpu);
158void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
159int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp);
160
161bool is_vmware_backdoor_pmc(u32 pmc_idx);
162
163extern struct kvm_pmu_ops intel_pmu_ops;
164extern struct kvm_pmu_ops amd_pmu_ops;
165#endif
166
