tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2015 Linaro Ltd.
3 * Author: Shannon Zhao <shannon.zhao@linaro.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef __ASM_ARM_KVM_PMU_H
19#define __ASM_ARM_KVM_PMU_H
20
21#include <linux/perf_event.h>
22#include <asm/perf_event.h>
23
24#define ARMV8_PMU_CYCLE_IDX (ARMV8_PMU_MAX_COUNTERS - 1)
25
26#ifdef CONFIG_KVM_ARM_PMU
27
28struct kvm_pmc {
29 u8 idx; /* index into the pmu->pmc array */
30 struct perf_event *perf_event;
31 u64 bitmask;
32};
33
34struct kvm_pmu {
35 int irq_num;
36 struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
37 bool ready;
38 bool created;
39 bool irq_level;
40};
41
42#define kvm_arm_pmu_v3_ready(v) ((v)->arch.pmu.ready)
43#define kvm_arm_pmu_irq_initialized(v) ((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
44u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
45void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
46u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
47void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
48void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
49void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
50void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
51void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
52void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
53bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
54void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
55void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
56void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
57void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
58 u64 select_idx);
59bool kvm_arm_support_pmu_v3(void);
60int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
61 struct kvm_device_attr *attr);
62int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
63 struct kvm_device_attr *attr);
64int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
65 struct kvm_device_attr *attr);
66int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
67#else
68struct kvm_pmu {
69};
70
71#define kvm_arm_pmu_v3_ready(v) (false)
72#define kvm_arm_pmu_irq_initialized(v) (false)
73static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
74 u64 select_idx)
75{
76 return 0;
77}
78static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
79 u64 select_idx, u64 val) {}
80static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
81{
82 return 0;
83}
84static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
85static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
86static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
87static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
88static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
89static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
90static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
91{
92 return false;
93}
94static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
95static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
96static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
97static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
98 u64 data, u64 select_idx) {}
99static inline bool kvm_arm_support_pmu_v3(void) { return false; }
100static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
101 struct kvm_device_attr *attr)
102{
103 return -ENXIO;
104}
105static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
106 struct kvm_device_attr *attr)
107{
108 return -ENXIO;
109}
110static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
111 struct kvm_device_attr *attr)
112{
113 return -ENXIO;
114}
115static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
116{
117 return 0;
118}
119#endif
120
121#endif