2 * Copyright (C) 2012 ARM Ltd.
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
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.
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.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #ifndef __ASM_ARM_KVM_ARCH_TIMER_H
20 #define __ASM_ARM_KVM_ARCH_TIMER_H
22 #include <linux/clocksource.h>
23 #include <linux/hrtimer.h>
24 #include <linux/workqueue.h>
26 struct arch_timer_context {
27 /* Registers: control register, timer value */
32 struct kvm_irq_level irq;
35 * We have multiple paths which can save/restore the timer state
36 * onto the hardware, so we need some way of keeping track of
37 * where the latest state is.
39 * loaded == true: State is loaded on the hardware registers.
40 * loaded == false: State is stored in memory.
48 struct arch_timer_cpu {
49 struct arch_timer_context vtimer;
50 struct arch_timer_context ptimer;
52 /* Background timer used when the guest is not running */
53 struct hrtimer bg_timer;
55 /* Work queued with the above timer expires */
56 struct work_struct expired;
58 /* Physical timer emulation */
59 struct hrtimer phys_timer;
61 /* Is the timer enabled */
65 int kvm_timer_hyp_init(bool);
66 int kvm_timer_enable(struct kvm_vcpu *vcpu);
67 int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);
68 void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
69 void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
70 bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu);
71 void kvm_timer_update_run(struct kvm_vcpu *vcpu);
72 void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
74 u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
75 int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
77 int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
78 int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
79 int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
81 bool kvm_timer_is_pending(struct kvm_vcpu *vcpu);
83 void kvm_timer_schedule(struct kvm_vcpu *vcpu);
84 void kvm_timer_unschedule(struct kvm_vcpu *vcpu);
86 u64 kvm_phys_timer_read(void);
88 void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);
89 void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
91 void kvm_timer_init_vhe(void);
93 bool kvm_arch_timer_get_input_level(int vintid);
95 #define vcpu_vtimer(v) (&(v)->arch.timer_cpu.vtimer)
96 #define vcpu_ptimer(v) (&(v)->arch.timer_cpu.ptimer)