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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 {
Marc Zyngier53e72402013-01-23 13:21:58 -050027 /* Is the timer enabled */
28 bool enabled;
29
30 /* Virtual offset */
31 cycle_t cntvoff;
Marc Zyngier53e72402013-01-23 13:21:58 -050032};
33
34struct arch_timer_cpu {
Marc Zyngier53e72402013-01-23 13:21:58 -050035 /* 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 const struct kvm_irq_level *irq;
Marc Zyngierf120cd62014-06-23 13:59:13 +010055
56 /* VGIC mapping */
57 struct irq_phys_map *map;
Marc Zyngier53e72402013-01-23 13:21:58 -050058};
59
Marc Zyngier53e72402013-01-23 13:21:58 -050060int kvm_timer_hyp_init(void);
Christoffer Dall05971122014-12-12 21:19:23 +010061void kvm_timer_enable(struct kvm *kvm);
62void kvm_timer_init(struct kvm *kvm);
Marc Zyngierf120cd62014-06-23 13:59:13 +010063int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
64 const struct kvm_irq_level *irq);
Marc Zyngier53e72402013-01-23 13:21:58 -050065void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
66void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
67void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
68void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
Alex Bennée1df08ba2014-07-04 15:54:14 +010069
70u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
71int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
72
Christoffer Dall1a748472015-03-13 17:02:55 +000073bool kvm_timer_should_fire(struct kvm_vcpu *vcpu);
74
Marc Zyngier53e72402013-01-23 13:21:58 -050075#endif