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
28 struct kvm_pmc {
29 u8 idx; /* index into the pmu->pmc array */
30 struct perf_event *perf_event;
31 u64 bitmask;
32 };
33
34 struct 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)
44 u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
45 void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
46 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
47 void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
48 void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
49 void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val);
50 void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val);
51 void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
52 void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
53 bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
54 void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
55 void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
56 void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
57 void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
58 u64 select_idx);
59 bool kvm_arm_support_pmu_v3(void);
60 int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
61 struct kvm_device_attr *attr);
62 int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
63 struct kvm_device_attr *attr);
64 int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
65 struct kvm_device_attr *attr);
66 int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
67 #else
68 struct kvm_pmu {
69 };
70
71 #define kvm_arm_pmu_v3_ready(v) (false)
72 #define kvm_arm_pmu_irq_initialized(v) (false)
kvm_pmu_get_counter_value(struct kvm_vcpu * vcpu,u64 select_idx)73 static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
74 u64 select_idx)
75 {
76 return 0;
77 }
kvm_pmu_set_counter_value(struct kvm_vcpu * vcpu,u64 select_idx,u64 val)78 static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
79 u64 select_idx, u64 val) {}
kvm_pmu_valid_counter_mask(struct kvm_vcpu * vcpu)80 static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
81 {
82 return 0;
83 }
kvm_pmu_vcpu_reset(struct kvm_vcpu * vcpu)84 static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
kvm_pmu_vcpu_destroy(struct kvm_vcpu * vcpu)85 static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
kvm_pmu_disable_counter(struct kvm_vcpu * vcpu,u64 val)86 static inline void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u64 val) {}
kvm_pmu_enable_counter(struct kvm_vcpu * vcpu,u64 val)87 static inline void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u64 val) {}
kvm_pmu_flush_hwstate(struct kvm_vcpu * vcpu)88 static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
kvm_pmu_sync_hwstate(struct kvm_vcpu * vcpu)89 static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
kvm_pmu_should_notify_user(struct kvm_vcpu * vcpu)90 static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
91 {
92 return false;
93 }
kvm_pmu_update_run(struct kvm_vcpu * vcpu)94 static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
kvm_pmu_software_increment(struct kvm_vcpu * vcpu,u64 val)95 static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
kvm_pmu_handle_pmcr(struct kvm_vcpu * vcpu,u64 val)96 static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
kvm_pmu_set_counter_event_type(struct kvm_vcpu * vcpu,u64 data,u64 select_idx)97 static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
98 u64 data, u64 select_idx) {}
kvm_arm_support_pmu_v3(void)99 static inline bool kvm_arm_support_pmu_v3(void) { return false; }
kvm_arm_pmu_v3_set_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)100 static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
101 struct kvm_device_attr *attr)
102 {
103 return -ENXIO;
104 }
kvm_arm_pmu_v3_get_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)105 static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
106 struct kvm_device_attr *attr)
107 {
108 return -ENXIO;
109 }
kvm_arm_pmu_v3_has_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)110 static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
111 struct kvm_device_attr *attr)
112 {
113 return -ENXIO;
114 }
kvm_arm_pmu_v3_enable(struct kvm_vcpu * vcpu)115 static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
116 {
117 return 0;
118 }
119 #endif
120
121 #endif
122