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Marc Zyngier53e72402013-01-23 13:21:58 -05001/*
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);
Anup Patel5ae7f872013-04-30 12:02:15 +053064void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
65 const struct kvm_irq_level *irq);
Marc Zyngier53e72402013-01-23 13:21:58 -050066void 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
Anup Patel5ae7f872013-04-30 12:02:15 +053081static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
82 const struct kvm_irq_level *irq) {}
Marc Zyngier53e72402013-01-23 13:21:58 -050083static 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