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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); |
64 | void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, |
65 | const struct kvm_irq_level *irq); |
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 | |
81 | static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, |
82 | const struct kvm_irq_level *irq) {} |
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 |
90 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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v3.9