1/*
 2 * Copyright (C) 2012 ARM Ltd.
 3 * Author: Marc Zyngier <marc.zyngier@arm.com>
 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, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19#ifndef __ASM_ARM_KVM_ARCH_TIMER_H
20#define __ASM_ARM_KVM_ARCH_TIMER_H
21
22#include <linux/clocksource.h>
23#include <linux/hrtimer.h>
24#include <linux/workqueue.h>
25
26struct arch_timer_kvm {
27#ifdef CONFIG_KVM_ARM_TIMER
28	/* Is the timer enabled */
29	bool			enabled;
30
31	/* Virtual offset */
32	cycle_t			cntvoff;
33#endif
34};
35
36struct arch_timer_cpu {
37#ifdef CONFIG_KVM_ARM_TIMER
38	/* Registers: control register, timer value */
39	u32				cntv_ctl;	/* Saved/restored */
40	cycle_t				cntv_cval;	/* Saved/restored */
41
42	/*
43	 * Anything that is not used directly from assembly code goes
44	 * here.
45	 */
46
47	/* Background timer used when the guest is not running */
48	struct hrtimer			timer;
49
50	/* Work queued with the above timer expires */
51	struct work_struct		expired;
52
53	/* Background timer active */
54	bool				armed;
55
56	/* Timer IRQ */
57	const struct kvm_irq_level	*irq;
58#endif
59};
60
61#ifdef CONFIG_KVM_ARM_TIMER
62int kvm_timer_hyp_init(void);
63int kvm_timer_init(struct kvm *kvm);
64void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
65			  const struct kvm_irq_level *irq);
66void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
67void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
68void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
69void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
70#else
71static inline int kvm_timer_hyp_init(void)
72{
73	return 0;
74};
75
76static inline int kvm_timer_init(struct kvm *kvm)
77{
78	return 0;
79}
80
81static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
82					const struct kvm_irq_level *irq) {}
83static inline void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) {}
84static inline void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu) {}
85static inline void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu) {}
86static inline void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu) {}
87#endif
88
89#endif