Linux 5.9-rc7
[sfrench/cifs-2.6.git] / include / kvm / arm_pmu.h
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 <asm/perf_event.h>
12
13 #define ARMV8_PMU_CYCLE_IDX             (ARMV8_PMU_MAX_COUNTERS - 1)
14 #define ARMV8_PMU_MAX_COUNTER_PAIRS     ((ARMV8_PMU_MAX_COUNTERS + 1) >> 1)
15
16 #ifdef CONFIG_KVM_ARM_PMU
17
18 struct kvm_pmc {
19         u8 idx; /* index into the pmu->pmc array */
20         struct perf_event *perf_event;
21 };
22
23 struct kvm_pmu {
24         int irq_num;
25         struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
26         DECLARE_BITMAP(chained, ARMV8_PMU_MAX_COUNTER_PAIRS);
27         bool ready;
28         bool created;
29         bool irq_level;
30 };
31
32 #define kvm_arm_pmu_v3_ready(v)         ((v)->arch.pmu.ready)
33 #define kvm_arm_pmu_irq_initialized(v)  ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
34 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
35 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
36 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
37 void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
38 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
39 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
40 void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
41 void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
42 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
43 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
44 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
45 void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
46 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
47 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
48 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
49                                     u64 select_idx);
50 bool kvm_arm_support_pmu_v3(void);
51 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
52                             struct kvm_device_attr *attr);
53 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
54                             struct kvm_device_attr *attr);
55 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
56                             struct kvm_device_attr *attr);
57 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
58 #else
59 struct kvm_pmu {
60 };
61
62 #define kvm_arm_pmu_v3_ready(v)         (false)
63 #define kvm_arm_pmu_irq_initialized(v)  (false)
64 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
65                                             u64 select_idx)
66 {
67         return 0;
68 }
69 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
70                                              u64 select_idx, u64 val) {}
71 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
72 {
73         return 0;
74 }
75 static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
76 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
77 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
78 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
79 static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
80 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
81 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
82 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
83 {
84         return false;
85 }
86 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
87 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
88 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
89 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
90                                                   u64 data, u64 select_idx) {}
91 static inline bool kvm_arm_support_pmu_v3(void) { return false; }
92 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
93                                           struct kvm_device_attr *attr)
94 {
95         return -ENXIO;
96 }
97 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
98                                           struct kvm_device_attr *attr)
99 {
100         return -ENXIO;
101 }
102 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
103                                           struct kvm_device_attr *attr)
104 {
105         return -ENXIO;
106 }
107 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
108 {
109         return 0;
110 }
111 #endif
112
113 #endif