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 void (*deliver_pmi)(struct kvm_vcpu *vcpu);
43 void (*cleanup)(struct kvm_vcpu *vcpu);
44};
45
46static inline u64 pmc_bitmask(struct kvm_pmc *pmc)
47{
48 struct kvm_pmu *pmu = pmc_to_pmu(pmc);
49
50 return pmu->counter_bitmask[pmc->type];
51}
52
53static inline u64 pmc_read_counter(struct kvm_pmc *pmc)
54{
55 u64 counter, enabled, running;
56
57 counter = pmc->counter;
58 if (pmc->perf_event && !pmc->is_paused)
59 counter += perf_event_read_value(pmc->perf_event,
60 &enabled, &running);
61
62 return counter & pmc_bitmask(pmc);
63}
64
65static inline void pmc_release_perf_event(struct kvm_pmc *pmc)
66{
67 if (pmc->perf_event) {
68 perf_event_release_kernel(pmc->perf_event);
69 pmc->perf_event = NULL;
70 pmc->current_config = 0;
71 pmc_to_pmu(pmc)->event_count--;
72 }
73}
74
75static inline void pmc_stop_counter(struct kvm_pmc *pmc)
76{
77 if (pmc->perf_event) {
78 pmc->counter = pmc_read_counter(pmc);
79 pmc_release_perf_event(pmc);
80 }
81}
82
83static inline bool pmc_is_gp(struct kvm_pmc *pmc)
84{
85 return pmc->type == KVM_PMC_GP;
86}
87
88static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
89{
90 return pmc->type == KVM_PMC_FIXED;
91}
92
93static inline bool pmc_is_enabled(struct kvm_pmc *pmc)
94{
95 return kvm_x86_ops.pmu_ops->pmc_is_enabled(pmc);
96}
97
98static inline bool kvm_valid_perf_global_ctrl(struct kvm_pmu *pmu,
99 u64 data)
100{
101 return !(pmu->global_ctrl_mask & data);
102}
103
104
105
106
107
108static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr,
109 u32 base)
110{
111 if (msr >= base && msr < base + pmu->nr_arch_gp_counters) {
112 u32 index = array_index_nospec(msr - base,
113 pmu->nr_arch_gp_counters);
114
115 return &pmu->gp_counters[index];
116 }
117
118 return NULL;
119}
120
121
122static inline struct kvm_pmc *get_fixed_pmc(struct kvm_pmu *pmu, u32 msr)
123{
124 int base = MSR_CORE_PERF_FIXED_CTR0;
125
126 if (msr >= base && msr < base + pmu->nr_arch_fixed_counters) {
127 u32 index = array_index_nospec(msr - base,
128 pmu->nr_arch_fixed_counters);
129
130 return &pmu->fixed_counters[index];
131 }
132
133 return NULL;
134}
135
136static inline u64 get_sample_period(struct kvm_pmc *pmc, u64 counter_value)
137{
138 u64 sample_period = (-counter_value) & pmc_bitmask(pmc);
139
140 if (!sample_period)
141 sample_period = pmc_bitmask(pmc) + 1;
142 return sample_period;
143}
144
145void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel);
146void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx);
147void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx);
148
149void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
150void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
151int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
152int kvm_pmu_is_valid_rdpmc_ecx(struct kvm_vcpu *vcpu, unsigned int idx);
153bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr);
154int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
155int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
156void kvm_pmu_refresh(struct kvm_vcpu *vcpu);
157void kvm_pmu_reset(struct kvm_vcpu *vcpu);
158void kvm_pmu_init(struct kvm_vcpu *vcpu);
159void kvm_pmu_cleanup(struct kvm_vcpu *vcpu);
160void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
161int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp);
162
163bool is_vmware_backdoor_pmc(u32 pmc_idx);
164
165extern struct kvm_pmu_ops intel_pmu_ops;
166extern struct kvm_pmu_ops amd_pmu_ops;
167#endif
168
