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Linux kernel mirror (for testing)
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linux
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 ARMV8_PMU_CYCLE_IDX (ARMV8_PMU_MAX_COUNTERS - 1)
14
15#if IS_ENABLED(CONFIG_HW_PERF_EVENTS) && IS_ENABLED(CONFIG_KVM)
16struct kvm_pmc {
17 u8 idx; /* index into the pmu->pmc array */
18 struct perf_event *perf_event;
19};
20
21struct kvm_pmu_events {
22 u32 events_host;
23 u32 events_guest;
24};
25
26struct kvm_pmu {
27 struct irq_work overflow_work;
28 struct kvm_pmu_events events;
29 struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
30 int irq_num;
31 bool created;
32 bool irq_level;
33};
34
35struct arm_pmu_entry {
36 struct list_head entry;
37 struct arm_pmu *arm_pmu;
38};
39
40DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
41
42static __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)
48u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
49void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
50u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
51u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1);
52void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
53void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
54void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
55void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
56void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
57void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
58void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
59bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
60void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
61void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
62void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
63void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
64 u64 select_idx);
65void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu);
66int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
67 struct kvm_device_attr *attr);
68int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
69 struct kvm_device_attr *attr);
70int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
71 struct kvm_device_attr *attr);
72int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
73
74struct kvm_pmu_events *kvm_get_pmu_events(void);
75void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu);
76void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu);
77void 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
93u8 kvm_arm_pmu_get_pmuver_limit(void);
94u64 kvm_pmu_evtyper_mask(struct kvm *kvm);
95int kvm_arm_set_default_pmu(struct kvm *kvm);
96u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm);
97
98u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu);
99#else
100struct kvm_pmu {
101};
102
103static inline bool kvm_arm_support_pmu_v3(void)
104{
105 return false;
106}
107
108#define kvm_arm_pmu_irq_initialized(v) (false)
109static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
110 u64 select_idx)
111{
112 return 0;
113}
114static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
115 u64 select_idx, u64 val) {}
116static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
117{
118 return 0;
119}
120static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
121static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
122static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
123static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
124static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
125static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
126static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
127static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
128{
129 return false;
130}
131static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
132static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
133static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
134static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
135 u64 data, u64 select_idx) {}
136static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
137 struct kvm_device_attr *attr)
138{
139 return -ENXIO;
140}
141static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
142 struct kvm_device_attr *attr)
143{
144 return -ENXIO;
145}
146static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
147 struct kvm_device_attr *attr)
148{
149 return -ENXIO;
150}
151static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
152{
153 return 0;
154}
155static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
156{
157 return 0;
158}
159
160#define kvm_vcpu_has_pmu(vcpu) ({ false; })
161static inline void kvm_pmu_update_vcpu_events(struct kvm_vcpu *vcpu) {}
162static inline void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu) {}
163static inline void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu) {}
164static inline void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu) {}
165static inline u8 kvm_arm_pmu_get_pmuver_limit(void)
166{
167 return 0;
168}
169static inline u64 kvm_pmu_evtyper_mask(struct kvm *kvm)
170{
171 return 0;
172}
173static inline void kvm_vcpu_pmu_resync_el0(void) {}
174
175static inline int kvm_arm_set_default_pmu(struct kvm *kvm)
176{
177 return -ENODEV;
178}
179
180static inline u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm)
181{
182 return 0;
183}
184
185static inline u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu)
186{
187 return 0;
188}
189
190#endif
191
192#endif