Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
25struct arch_timer_context {
26 /* Registers: control register, timer value */
27 u32 cnt_ctl;
28 u64 cnt_cval;
29
30 /* Timer IRQ */
31 struct kvm_irq_level irq;
32
33 /*
34 * We have multiple paths which can save/restore the timer state
35 * onto the hardware, so we need some way of keeping track of
36 * where the latest state is.
37 *
38 * loaded == true: State is loaded on the hardware registers.
39 * loaded == false: State is stored in memory.
40 */
41 bool loaded;
42
43 /* Virtual offset */
44 u64 cntvoff;
45};
46
47struct arch_timer_cpu {
48 struct arch_timer_context vtimer;
49 struct arch_timer_context ptimer;
50
51 /* Background timer used when the guest is not running */
52 struct hrtimer bg_timer;
53
54 /* Physical timer emulation */
55 struct hrtimer phys_timer;
56
57 /* Is the timer enabled */
58 bool enabled;
59};
60
61int kvm_timer_hyp_init(bool);
62int kvm_timer_enable(struct kvm_vcpu *vcpu);
63int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);
64void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
65void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
66bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu);
67void kvm_timer_update_run(struct kvm_vcpu *vcpu);
68void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
69
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
73int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
74int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
75int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
76
77bool kvm_timer_is_pending(struct kvm_vcpu *vcpu);
78
79void kvm_timer_schedule(struct kvm_vcpu *vcpu);
80void kvm_timer_unschedule(struct kvm_vcpu *vcpu);
81
82u64 kvm_phys_timer_read(void);
83
84void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);
85void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
86
87void kvm_timer_init_vhe(void);
88
89bool kvm_arch_timer_get_input_level(int vintid);
90
91#define vcpu_vtimer(v) (&(v)->arch.timer_cpu.vtimer)
92#define vcpu_ptimer(v) (&(v)->arch.timer_cpu.ptimer)
93
94#endif