1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2015 Linaro Ltd.
4 * Author: Shannon Zhao <shannon.zhao@linaro.org>
5 */
6
7 #ifndef __ASM_ARM_KVM_PMU_H
8 #define __ASM_ARM_KVM_PMU_H
9
10 #include <linux/perf_event.h>
11 #include <linux/perf/arm_pmuv3.h>
12
13 #define KVM_ARMV8_PMU_MAX_COUNTERS 32
14
15 #if IS_ENABLED(CONFIG_HW_PERF_EVENTS) && IS_ENABLED(CONFIG_KVM)
16 struct kvm_pmc {
17 u8 idx; /* index into the pmu->pmc array */
18 struct perf_event *perf_event;
19 };
20
21 struct kvm_pmu_events {
22 u64 events_host;
23 u64 events_guest;
24 };
25
26 struct kvm_pmu {
27 struct irq_work overflow_work;
28 struct kvm_pmu_events events;
29 struct kvm_pmc pmc[KVM_ARMV8_PMU_MAX_COUNTERS];
30 int irq_num;
31 bool created;
32 bool irq_level;
33 };
34
35 struct arm_pmu_entry {
36 struct list_head entry;
37 struct arm_pmu *arm_pmu;
38 };
39
40 DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
41
kvm_arm_support_pmu_v3(void)42 static __always_inline bool kvm_arm_support_pmu_v3(void)
43 {
44 return static_branch_likely(&kvm_arm_pmu_available);
45 }
46
47 #define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
48 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
49 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
50 u64 kvm_pmu_implemented_counter_mask(struct kvm_vcpu *vcpu);
51 u64 kvm_pmu_accessible_counter_mask(struct kvm_vcpu *vcpu);
52 u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1);
53 void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
54 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
55 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
56 void kvm_pmu_reprogram_counter_mask(struct kvm_vcpu *vcpu, u64 val);
57 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
58 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
59 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
60 void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
61 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
62 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
63 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
64 u64 select_idx);
65 void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu);
66 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
67 struct kvm_device_attr *attr);
68 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
69 struct kvm_device_attr *attr);
70 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
71 struct kvm_device_attr *attr);
72 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
73
74 struct kvm_pmu_events *kvm_get_pmu_events(void);
75 void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu);
76 void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu);
77 void kvm_vcpu_pmu_resync_el0(void);
78
79 #define kvm_vcpu_has_pmu(vcpu) \
80 (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PMU_V3))
81
82 /*
83 * Updates the vcpu's view of the pmu events for this cpu.
84 * Must be called before every vcpu run after disabling interrupts, to ensure
85 * that an interrupt cannot fire and update the structure.
86 */
87 #define kvm_pmu_update_vcpu_events(vcpu) \
88 do { \
89 if (!has_vhe() && kvm_arm_support_pmu_v3()) \
90 vcpu->arch.pmu.events = *kvm_get_pmu_events(); \
91 } while (0)
92
93 u8 kvm_arm_pmu_get_pmuver_limit(void);
94 u64 kvm_pmu_evtyper_mask(struct kvm *kvm);
95 int kvm_arm_set_default_pmu(struct kvm *kvm);
96 u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm);
97
98 u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu);
99 bool kvm_pmu_counter_is_hyp(struct kvm_vcpu *vcpu, unsigned int idx);
100 void kvm_pmu_nested_transition(struct kvm_vcpu *vcpu);
101 #else
102 struct kvm_pmu {
103 };
104
kvm_arm_support_pmu_v3(void)105 static inline bool kvm_arm_support_pmu_v3(void)
106 {
107 return false;
108 }
109
110 #define kvm_arm_pmu_irq_initialized(v) (false)
kvm_pmu_get_counter_value(struct kvm_vcpu * vcpu,u64 select_idx)111 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
112 u64 select_idx)
113 {
114 return 0;
115 }
kvm_pmu_set_counter_value(struct kvm_vcpu * vcpu,u64 select_idx,u64 val)116 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
117 u64 select_idx, u64 val) {}
kvm_pmu_implemented_counter_mask(struct kvm_vcpu * vcpu)118 static inline u64 kvm_pmu_implemented_counter_mask(struct kvm_vcpu *vcpu)
119 {
120 return 0;
121 }
kvm_pmu_accessible_counter_mask(struct kvm_vcpu * vcpu)122 static inline u64 kvm_pmu_accessible_counter_mask(struct kvm_vcpu *vcpu)
123 {
124 return 0;
125 }
kvm_pmu_vcpu_init(struct kvm_vcpu * vcpu)126 static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
kvm_pmu_vcpu_reset(struct kvm_vcpu * vcpu)127 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
kvm_pmu_vcpu_destroy(struct kvm_vcpu * vcpu)128 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
kvm_pmu_reprogram_counter_mask(struct kvm_vcpu * vcpu,u64 val)129 static inline void kvm_pmu_reprogram_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
kvm_pmu_flush_hwstate(struct kvm_vcpu * vcpu)130 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
kvm_pmu_sync_hwstate(struct kvm_vcpu * vcpu)131 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
kvm_pmu_should_notify_user(struct kvm_vcpu * vcpu)132 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
133 {
134 return false;
135 }
kvm_pmu_update_run(struct kvm_vcpu * vcpu)136 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
kvm_pmu_software_increment(struct kvm_vcpu * vcpu,u64 val)137 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
kvm_pmu_handle_pmcr(struct kvm_vcpu * vcpu,u64 val)138 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
kvm_pmu_set_counter_event_type(struct kvm_vcpu * vcpu,u64 data,u64 select_idx)139 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
140 u64 data, u64 select_idx) {}
kvm_arm_pmu_v3_set_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)141 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
142 struct kvm_device_attr *attr)
143 {
144 return -ENXIO;
145 }
kvm_arm_pmu_v3_get_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)146 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
147 struct kvm_device_attr *attr)
148 {
149 return -ENXIO;
150 }
kvm_arm_pmu_v3_has_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)151 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
152 struct kvm_device_attr *attr)
153 {
154 return -ENXIO;
155 }
kvm_arm_pmu_v3_enable(struct kvm_vcpu * vcpu)156 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
157 {
158 return 0;
159 }
kvm_pmu_get_pmceid(struct kvm_vcpu * vcpu,bool pmceid1)160 static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
161 {
162 return 0;
163 }
164
165 #define kvm_vcpu_has_pmu(vcpu) ({ false; })
kvm_pmu_update_vcpu_events(struct kvm_vcpu * vcpu)166 static inline void kvm_pmu_update_vcpu_events(struct kvm_vcpu *vcpu) {}
kvm_vcpu_pmu_restore_guest(struct kvm_vcpu * vcpu)167 static inline void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu) {}
kvm_vcpu_pmu_restore_host(struct kvm_vcpu * vcpu)168 static inline void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu) {}
kvm_vcpu_reload_pmu(struct kvm_vcpu * vcpu)169 static inline void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu) {}
kvm_arm_pmu_get_pmuver_limit(void)170 static inline u8 kvm_arm_pmu_get_pmuver_limit(void)
171 {
172 return 0;
173 }
kvm_pmu_evtyper_mask(struct kvm * kvm)174 static inline u64 kvm_pmu_evtyper_mask(struct kvm *kvm)
175 {
176 return 0;
177 }
kvm_vcpu_pmu_resync_el0(void)178 static inline void kvm_vcpu_pmu_resync_el0(void) {}
179
kvm_arm_set_default_pmu(struct kvm * kvm)180 static inline int kvm_arm_set_default_pmu(struct kvm *kvm)
181 {
182 return -ENODEV;
183 }
184
kvm_arm_pmu_get_max_counters(struct kvm * kvm)185 static inline u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm)
186 {
187 return 0;
188 }
189
kvm_vcpu_read_pmcr(struct kvm_vcpu * vcpu)190 static inline u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu)
191 {
192 return 0;
193 }
194
kvm_pmu_counter_is_hyp(struct kvm_vcpu * vcpu,unsigned int idx)195 static inline bool kvm_pmu_counter_is_hyp(struct kvm_vcpu *vcpu, unsigned int idx)
196 {
197 return false;
198 }
199
kvm_pmu_nested_transition(struct kvm_vcpu * vcpu)200 static inline void kvm_pmu_nested_transition(struct kvm_vcpu *vcpu) {}
201
202 #endif
203
204 #endif
205