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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
Jintack Limfbb4aee2017-02-03 10:19:59 -050026struct arch_timer_context {
Marc Zyngier53e72402013-01-23 13:21:58 -050027 /* Registers: control register, timer value */
Jintack Limfbb4aee2017-02-03 10:19:59 -050028 u32 cnt_ctl;
29 u64 cnt_cval;
Marc Zyngier53e72402013-01-23 13:21:58 -050030
Jintack Limfbb4aee2017-02-03 10:19:59 -050031 /* Timer IRQ */
32 struct kvm_irq_level irq;
33
34 /* Active IRQ state caching */
35 bool active_cleared_last;
Jintack Lim90de9432017-02-03 10:20:00 -050036
37 /* Virtual offset */
38 u64 cntvoff;
Jintack Limfbb4aee2017-02-03 10:19:59 -050039};
40
41struct arch_timer_cpu {
42 struct arch_timer_context vtimer;
Marc Zyngier53e72402013-01-23 13:21:58 -050043
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
Christoffer Dall41a54482016-05-18 16:26:00 +010053 /* Is the timer enabled */
54 bool enabled;
Marc Zyngier53e72402013-01-23 13:21:58 -050055};
56
Marc Zyngier53e72402013-01-23 13:21:58 -050057int kvm_timer_hyp_init(void);
Christoffer Dall41a54482016-05-18 16:26:00 +010058int kvm_timer_enable(struct kvm_vcpu *vcpu);
Marc Zyngierf120cd62014-06-23 13:59:13 +010059int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
60 const struct kvm_irq_level *irq);
Marc Zyngier53e72402013-01-23 13:21:58 -050061void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
62void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
63void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
64void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
Alex Bennée1df08ba2014-07-04 15:54:14 +010065
66u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
67int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
68
Christoffer Dall1a748472015-03-13 17:02:55 +000069bool kvm_timer_should_fire(struct kvm_vcpu *vcpu);
Christoffer Dalld35268d2015-08-25 19:48:21 +020070void kvm_timer_schedule(struct kvm_vcpu *vcpu);
71void kvm_timer_unschedule(struct kvm_vcpu *vcpu);
Christoffer Dall1a748472015-03-13 17:02:55 +000072
Marc Zyngier9b4a3002016-01-29 19:04:48 +000073void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
74
Jintack Lim488f94d2016-12-01 14:32:05 -050075void kvm_timer_init_vhe(void);
Jintack Limfbb4aee2017-02-03 10:19:59 -050076
77#define vcpu_vtimer(v) (&(v)->arch.timer_cpu.vtimer)
Marc Zyngier53e72402013-01-23 13:21:58 -050078#endif