Merge tag 'backlight-next-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-microblaze.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 DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
17
18 static __always_inline bool kvm_arm_support_pmu_v3(void)
19 {
20         return static_branch_likely(&kvm_arm_pmu_available);
21 }
22
23 #ifdef CONFIG_HW_PERF_EVENTS
24
25 struct kvm_pmc {
26         u8 idx; /* index into the pmu->pmc array */
27         struct perf_event *perf_event;
28 };
29
30 struct kvm_pmu {
31         int irq_num;
32         struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
33         DECLARE_BITMAP(chained, ARMV8_PMU_MAX_COUNTER_PAIRS);
34         bool created;
35         bool irq_level;
36         struct irq_work overflow_work;
37 };
38
39 #define kvm_arm_pmu_irq_initialized(v)  ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
40 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
41 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
42 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
43 u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1);
44 void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
45 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
46 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
47 void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
48 void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
49 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
50 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
51 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
52 void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
53 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
54 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
55 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
56                                     u64 select_idx);
57 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
58                             struct kvm_device_attr *attr);
59 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
60                             struct kvm_device_attr *attr);
61 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
62                             struct kvm_device_attr *attr);
63 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
64 #else
65 struct kvm_pmu {
66 };
67
68 #define kvm_arm_pmu_irq_initialized(v)  (false)
69 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
70                                             u64 select_idx)
71 {
72         return 0;
73 }
74 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
75                                              u64 select_idx, u64 val) {}
76 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
77 {
78         return 0;
79 }
80 static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
81 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
82 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
83 static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
84 static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
85 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
86 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
87 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
88 {
89         return false;
90 }
91 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
92 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
93 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
94 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
95                                                   u64 data, u64 select_idx) {}
96 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
97                                           struct kvm_device_attr *attr)
98 {
99         return -ENXIO;
100 }
101 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
102                                           struct kvm_device_attr *attr)
103 {
104         return -ENXIO;
105 }
106 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
107                                           struct kvm_device_attr *attr)
108 {
109         return -ENXIO;
110 }
111 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
112 {
113         return 0;
114 }
115 static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
116 {
117         return 0;
118 }
119
120 #endif
121
122 #endif