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53e72406 MZ |
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 | ||
26 | struct 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 | ||
36 | struct 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 | |
62 | int kvm_timer_hyp_init(void); | |
63 | int kvm_timer_init(struct kvm *kvm); | |
5ae7f87a AP |
64 | void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, |
65 | const struct kvm_irq_level *irq); | |
53e72406 MZ |
66 | void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu); |
67 | void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu); | |
68 | void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu); | |
69 | void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu); | |
70 | #else | |
71 | static inline int kvm_timer_hyp_init(void) | |
72 | { | |
73 | return 0; | |
74 | }; | |
75 | ||
76 | static inline int kvm_timer_init(struct kvm *kvm) | |
77 | { | |
78 | return 0; | |
79 | } | |
80 | ||
5ae7f87a AP |
81 | static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, |
82 | const struct kvm_irq_level *irq) {} | |
53e72406 MZ |
83 | static inline void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) {} |
84 | static inline void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu) {} | |
85 | static inline void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu) {} | |
86 | static inline void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu) {} | |
87 | #endif | |
88 | ||
89 | #endif |