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Linux kernel mirror (for testing)
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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
18struct kvm_pmc {
19 u8 idx; /* index into the pmu->pmc array */
20 struct perf_event *perf_event;
21};
22
23struct 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 struct irq_work overflow_work;
31};
32
33#define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready)
34#define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
35u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
36void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
37u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
38u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1);
39void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
40void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
41void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
42void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
43void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
44void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
45void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
46bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
47void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
48void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
49void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
50void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
51 u64 select_idx);
52bool kvm_arm_support_pmu_v3(void);
53int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
54 struct kvm_device_attr *attr);
55int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
56 struct kvm_device_attr *attr);
57int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
58 struct kvm_device_attr *attr);
59int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
60#else
61struct kvm_pmu {
62};
63
64#define kvm_arm_pmu_v3_ready(v) (false)
65#define kvm_arm_pmu_irq_initialized(v) (false)
66static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
67 u64 select_idx)
68{
69 return 0;
70}
71static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
72 u64 select_idx, u64 val) {}
73static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
74{
75 return 0;
76}
77static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
78static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
79static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
80static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
81static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
82static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
83static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
84static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
85{
86 return false;
87}
88static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
89static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
90static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
91static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
92 u64 data, u64 select_idx) {}
93static inline bool kvm_arm_support_pmu_v3(void) { return false; }
94static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
95 struct kvm_device_attr *attr)
96{
97 return -ENXIO;
98}
99static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
100 struct kvm_device_attr *attr)
101{
102 return -ENXIO;
103}
104static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
105 struct kvm_device_attr *attr)
106{
107 return -ENXIO;
108}
109static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
110{
111 return 0;
112}
113static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
114{
115 return 0;
116}
117#endif
118
119#endif