1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2012 ARM Ltd.
4 * Author: Marc Zyngier <marc.zyngier@arm.com>
7 #ifndef __ASM_ARM_KVM_ARCH_TIMER_H
8 #define __ASM_ARM_KVM_ARCH_TIMER_H
10 #include <linux/clocksource.h>
11 #include <linux/hrtimer.h>
13 enum kvm_arch_timers {
19 enum kvm_arch_timer_regs {
26 struct arch_timer_offset {
28 * If set, pointer to one of the offsets in the kvm's offset
29 * structure. If NULL, assume a zero offset.
34 struct arch_timer_vm_data {
35 /* Offset applied to the virtual timer/counter */
39 struct arch_timer_context {
40 struct kvm_vcpu *vcpu;
43 struct kvm_irq_level irq;
45 /* Emulated Timer (may be unused) */
46 struct hrtimer hrtimer;
48 /* Offset for this counter/timer */
49 struct arch_timer_offset offset;
51 * We have multiple paths which can save/restore the timer state onto
52 * the hardware, so we need some way of keeping track of where the
57 /* Duplicated state from arch_timer.c for convenience */
59 u32 host_timer_irq_flags;
63 struct arch_timer_context *direct_vtimer;
64 struct arch_timer_context *direct_ptimer;
65 struct arch_timer_context *emul_ptimer;
68 struct arch_timer_cpu {
69 struct arch_timer_context timers[NR_KVM_TIMERS];
71 /* Background timer used when the guest is not running */
72 struct hrtimer bg_timer;
74 /* Is the timer enabled */
78 int __init kvm_timer_hyp_init(bool has_gic);
79 int kvm_timer_enable(struct kvm_vcpu *vcpu);
80 int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);
81 void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
82 void kvm_timer_sync_user(struct kvm_vcpu *vcpu);
83 bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu);
84 void kvm_timer_update_run(struct kvm_vcpu *vcpu);
85 void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
87 u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
88 int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
90 int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
91 int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
92 int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
94 u64 kvm_phys_timer_read(void);
96 void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);
97 void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
99 void kvm_timer_init_vhe(void);
101 bool kvm_arch_timer_get_input_level(int vintid);
103 #define vcpu_timer(v) (&(v)->arch.timer_cpu)
104 #define vcpu_get_timer(v,t) (&vcpu_timer(v)->timers[(t)])
105 #define vcpu_vtimer(v) (&(v)->arch.timer_cpu.timers[TIMER_VTIMER])
106 #define vcpu_ptimer(v) (&(v)->arch.timer_cpu.timers[TIMER_PTIMER])
108 #define arch_timer_ctx_index(ctx) ((ctx) - vcpu_timer((ctx)->vcpu)->timers)
110 u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu,
111 enum kvm_arch_timers tmr,
112 enum kvm_arch_timer_regs treg);
113 void kvm_arm_timer_write_sysreg(struct kvm_vcpu *vcpu,
114 enum kvm_arch_timers tmr,
115 enum kvm_arch_timer_regs treg,
118 /* Needed for tracing */
119 u32 timer_get_ctl(struct arch_timer_context *ctxt);
120 u64 timer_get_cval(struct arch_timer_context *ctxt);
122 /* CPU HP callbacks */
123 void kvm_timer_cpu_up(void);
124 void kvm_timer_cpu_down(void);