Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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 KVM_ARMV8_PMU_MAX_COUNTERS 32
14
15/* PPI #23 - architecturally specified for GICv5 */
16#define KVM_ARMV8_PMU_GICV5_IRQ 0x20000017
17
18#if IS_ENABLED(CONFIG_HW_PERF_EVENTS) && IS_ENABLED(CONFIG_KVM)
19struct kvm_pmc {
20 u8 idx; /* index into the pmu->pmc array */
21 struct perf_event *perf_event;
22};
23
24struct kvm_pmu_events {
25 u64 events_host;
26 u64 events_guest;
27};
28
29struct kvm_pmu {
30 struct irq_work overflow_work;
31 struct kvm_pmu_events events;
32 struct kvm_pmc pmc[KVM_ARMV8_PMU_MAX_COUNTERS];
33 int irq_num;
34 bool created;
35 bool irq_level;
36};
37
38struct arm_pmu_entry {
39 struct list_head entry;
40 struct arm_pmu *arm_pmu;
41};
42
43bool kvm_supports_guest_pmuv3(void);
44#define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num != 0)
45u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
46void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
47void kvm_pmu_set_counter_value_user(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
48u64 kvm_pmu_implemented_counter_mask(struct kvm_vcpu *vcpu);
49u64 kvm_pmu_accessible_counter_mask(struct kvm_vcpu *vcpu);
50u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1);
51void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
52void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
53void kvm_pmu_reprogram_counter_mask(struct kvm_vcpu *vcpu, u64 val);
54void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
55void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
56bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
57void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
58void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
59void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
60void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
61 u64 select_idx);
62void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu);
63int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
64 struct kvm_device_attr *attr);
65int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
66 struct kvm_device_attr *attr);
67int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
68 struct kvm_device_attr *attr);
69int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
70
71struct kvm_pmu_events *kvm_get_pmu_events(void);
72void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu);
73void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu);
74void kvm_vcpu_pmu_resync_el0(void);
75
76#define kvm_vcpu_has_pmu(vcpu) \
77 (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PMU_V3))
78
79/*
80 * Updates the vcpu's view of the pmu events for this cpu.
81 * Must be called before every vcpu run after disabling interrupts, to ensure
82 * that an interrupt cannot fire and update the structure.
83 */
84#define kvm_pmu_update_vcpu_events(vcpu) \
85 do { \
86 if (!has_vhe() && system_supports_pmuv3()) \
87 vcpu->arch.pmu.events = *kvm_get_pmu_events(); \
88 } while (0)
89
90u8 kvm_arm_pmu_get_pmuver_limit(void);
91u64 kvm_pmu_evtyper_mask(struct kvm *kvm);
92int kvm_arm_set_default_pmu(struct kvm *kvm);
93u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm);
94
95u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu);
96bool kvm_pmu_counter_is_hyp(struct kvm_vcpu *vcpu, unsigned int idx);
97void kvm_pmu_nested_transition(struct kvm_vcpu *vcpu);
98#else
99struct kvm_pmu {
100};
101
102static inline bool kvm_supports_guest_pmuv3(void)
103{
104 return false;
105}
106
107#define kvm_arm_pmu_irq_initialized(v) (false)
108static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
109 u64 select_idx)
110{
111 return 0;
112}
113static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
114 u64 select_idx, u64 val) {}
115static inline void kvm_pmu_set_counter_value_user(struct kvm_vcpu *vcpu,
116 u64 select_idx, u64 val) {}
117static inline u64 kvm_pmu_implemented_counter_mask(struct kvm_vcpu *vcpu)
118{
119 return 0;
120}
121static inline u64 kvm_pmu_accessible_counter_mask(struct kvm_vcpu *vcpu)
122{
123 return 0;
124}
125static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
126static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
127static inline void kvm_pmu_reprogram_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
128static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
129static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
130static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
131{
132 return false;
133}
134static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
135static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
136static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
137static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
138 u64 data, u64 select_idx) {}
139static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
140 struct kvm_device_attr *attr)
141{
142 return -ENXIO;
143}
144static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
145 struct kvm_device_attr *attr)
146{
147 return -ENXIO;
148}
149static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
150 struct kvm_device_attr *attr)
151{
152 return -ENXIO;
153}
154static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
155{
156 return 0;
157}
158static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
159{
160 return 0;
161}
162
163#define kvm_vcpu_has_pmu(vcpu) ({ false; })
164static inline void kvm_pmu_update_vcpu_events(struct kvm_vcpu *vcpu) {}
165static inline void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu) {}
166static inline void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu) {}
167static inline void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu) {}
168static inline u8 kvm_arm_pmu_get_pmuver_limit(void)
169{
170 return 0;
171}
172static inline u64 kvm_pmu_evtyper_mask(struct kvm *kvm)
173{
174 return 0;
175}
176static inline void kvm_vcpu_pmu_resync_el0(void) {}
177
178static inline int kvm_arm_set_default_pmu(struct kvm *kvm)
179{
180 return -ENODEV;
181}
182
183static inline u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm)
184{
185 return 0;
186}
187
188static inline u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu)
189{
190 return 0;
191}
192
193static inline bool kvm_pmu_counter_is_hyp(struct kvm_vcpu *vcpu, unsigned int idx)
194{
195 return false;
196}
197
198static inline void kvm_pmu_nested_transition(struct kvm_vcpu *vcpu) {}
199
200#endif
201
202#endif