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45051539 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
53e72406 MZ |
2 | /* |
3 | * Copyright (C) 2012 ARM Ltd. | |
4 | * Author: Marc Zyngier <marc.zyngier@arm.com> | |
53e72406 MZ |
5 | */ |
6 | ||
7 | #ifndef __ASM_ARM_KVM_ARCH_TIMER_H | |
8 | #define __ASM_ARM_KVM_ARCH_TIMER_H | |
9 | ||
10 | #include <linux/clocksource.h> | |
11 | #include <linux/hrtimer.h> | |
53e72406 | 12 | |
84135d3d AP |
13 | enum kvm_arch_timers { |
14 | TIMER_PTIMER, | |
15 | TIMER_VTIMER, | |
16 | NR_KVM_TIMERS | |
17 | }; | |
18 | ||
19 | enum kvm_arch_timer_regs { | |
20 | TIMER_REG_CNT, | |
21 | TIMER_REG_CVAL, | |
22 | TIMER_REG_TVAL, | |
23 | TIMER_REG_CTL, | |
24 | }; | |
25 | ||
fbb4aeec | 26 | struct arch_timer_context { |
e604dd5d CD |
27 | struct kvm_vcpu *vcpu; |
28 | ||
53e72406 | 29 | /* Registers: control register, timer value */ |
fbb4aeec JL |
30 | u32 cnt_ctl; |
31 | u64 cnt_cval; | |
32 | ||
33 | /* Timer IRQ */ | |
34 | struct kvm_irq_level irq; | |
35 | ||
90de943a | 36 | /* Virtual offset */ |
e604dd5d CD |
37 | u64 cntvoff; |
38 | ||
39 | /* Emulated Timer (may be unused) */ | |
40 | struct hrtimer hrtimer; | |
9e01dc76 | 41 | |
bee038a6 CD |
42 | /* |
43 | * We have multiple paths which can save/restore the timer state onto | |
44 | * the hardware, so we need some way of keeping track of where the | |
45 | * latest state is. | |
46 | */ | |
47 | bool loaded; | |
48 | ||
9e01dc76 CD |
49 | /* Duplicated state from arch_timer.c for convenience */ |
50 | u32 host_timer_irq; | |
51 | u32 host_timer_irq_flags; | |
fbb4aeec | 52 | }; |
53e72406 | 53 | |
bee038a6 CD |
54 | struct timer_map { |
55 | struct arch_timer_context *direct_vtimer; | |
56 | struct arch_timer_context *direct_ptimer; | |
57 | struct arch_timer_context *emul_ptimer; | |
58 | }; | |
59 | ||
fbb4aeec | 60 | struct arch_timer_cpu { |
e604dd5d | 61 | struct arch_timer_context timers[NR_KVM_TIMERS]; |
53e72406 MZ |
62 | |
63 | /* Background timer used when the guest is not running */ | |
14d61fa9 | 64 | struct hrtimer bg_timer; |
53e72406 | 65 | |
41a54482 CD |
66 | /* Is the timer enabled */ |
67 | bool enabled; | |
53e72406 MZ |
68 | }; |
69 | ||
f384dcfe | 70 | int kvm_timer_hyp_init(bool); |
41a54482 | 71 | int kvm_timer_enable(struct kvm_vcpu *vcpu); |
85e69ad7 | 72 | int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu); |
53e72406 | 73 | void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu); |
53e72406 | 74 | void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu); |
d9e13977 AG |
75 | bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu); |
76 | void kvm_timer_update_run(struct kvm_vcpu *vcpu); | |
53e72406 | 77 | void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu); |
1df08ba0 AB |
78 | |
79 | u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid); | |
80 | int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value); | |
81 | ||
99a1db7a CD |
82 | int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); |
83 | int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); | |
84 | int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); | |
85 | ||
1c88ab7e CD |
86 | bool kvm_timer_is_pending(struct kvm_vcpu *vcpu); |
87 | ||
7b6b4631 JL |
88 | u64 kvm_phys_timer_read(void); |
89 | ||
b103cc3f | 90 | void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu); |
9b4a3004 MZ |
91 | void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu); |
92 | ||
488f94d7 | 93 | void kvm_timer_init_vhe(void); |
fbb4aeec | 94 | |
4c60e360 CD |
95 | bool kvm_arch_timer_get_input_level(int vintid); |
96 | ||
e604dd5d CD |
97 | #define vcpu_timer(v) (&(v)->arch.timer_cpu) |
98 | #define vcpu_get_timer(v,t) (&vcpu_timer(v)->timers[(t)]) | |
99 | #define vcpu_vtimer(v) (&(v)->arch.timer_cpu.timers[TIMER_VTIMER]) | |
100 | #define vcpu_ptimer(v) (&(v)->arch.timer_cpu.timers[TIMER_PTIMER]) | |
84135d3d | 101 | |
9e01dc76 CD |
102 | #define arch_timer_ctx_index(ctx) ((ctx) - vcpu_timer((ctx)->vcpu)->timers) |
103 | ||
84135d3d AP |
104 | u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu, |
105 | enum kvm_arch_timers tmr, | |
106 | enum kvm_arch_timer_regs treg); | |
107 | void kvm_arm_timer_write_sysreg(struct kvm_vcpu *vcpu, | |
108 | enum kvm_arch_timers tmr, | |
109 | enum kvm_arch_timer_regs treg, | |
110 | u64 val); | |
b103cc3f | 111 | |
53e72406 | 112 | #endif |