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Linux kernel mirror (for testing)
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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
16struct kvm_event_hw_type_mapping {
17 u8 eventsel;
18 u8 unit_mask;
19 unsigned event_type;
20};
21
22struct 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
39static 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
46static 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
58static 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
67static inline bool pmc_is_gp(struct kvm_pmc *pmc)
68{
69 return pmc->type == KVM_PMC_GP;
70}
71
72static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
73{
74 return pmc->type == KVM_PMC_FIXED;
75}
76
77static 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 */
86static 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 */
96static 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
106void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel);
107void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx);
108void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx);
109
110void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
111void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
112int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
113int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx);
114bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr);
115int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
116int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
117void kvm_pmu_refresh(struct kvm_vcpu *vcpu);
118void kvm_pmu_reset(struct kvm_vcpu *vcpu);
119void kvm_pmu_init(struct kvm_vcpu *vcpu);
120void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
121int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp);
122
123bool is_vmware_backdoor_pmc(u32 pmc_idx);
124
125extern struct kvm_pmu_ops intel_pmu_ops;
126extern struct kvm_pmu_ops amd_pmu_ops;
127#endif /* __KVM_X86_PMU_H */