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	/* Is the timer enabled */
28	bool			enabled;
29
30	/* Virtual offset */
31	cycle_t			cntvoff;
32};
33
34struct arch_timer_cpu {
35	/* Registers: control register, timer value */
36	u32				cntv_ctl;	/* Saved/restored */
37	cycle_t				cntv_cval;	/* Saved/restored */
38
39	/*
40	 * Anything that is not used directly from assembly code goes
41	 * here.
42	 */
43
44	/* Background timer used when the guest is not running */
45	struct hrtimer			timer;
46
47	/* Work queued with the above timer expires */
48	struct work_struct		expired;
49
50	/* Background timer active */
51	bool				armed;
52
53	/* Timer IRQ */
54	struct kvm_irq_level		irq;
55
56	/* VGIC mapping */
57	struct irq_phys_map		*map;
58
59	/* Active IRQ state caching */
60	bool				active_cleared_last;
61};
62
63int kvm_timer_hyp_init(void);
64void kvm_timer_enable(struct kvm *kvm);
65void kvm_timer_init(struct kvm *kvm);
66int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
67			 const struct kvm_irq_level *irq);
68void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
69void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
70void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
71void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
72
73u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
74int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
75
76bool kvm_timer_should_fire(struct kvm_vcpu *vcpu);
77void kvm_timer_schedule(struct kvm_vcpu *vcpu);
78void kvm_timer_unschedule(struct kvm_vcpu *vcpu);
79
80void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
81
82#endif