4 #include <linux/kthread.h>
8 struct kvm_kpit_channel_state {
9 u32 count; /* can be 65536 */
19 u8 bcd; /* not supported */
20 u8 gate; /* timer start */
21 ktime_t count_load_time;
24 struct kvm_kpit_state {
25 struct kvm_kpit_channel_state channels[3];
28 s64 period; /* unit: ns */
30 atomic_t pending; /* accumulated triggered timers */
36 spinlock_t inject_lock;
37 unsigned long irq_ack;
38 struct kvm_irq_ack_notifier irq_ack_notifier;
42 struct kvm_io_device dev;
43 struct kvm_io_device speaker_dev;
45 struct kvm_kpit_state pit_state;
47 struct kvm_irq_mask_notifier mask_notifier;
48 struct kthread_worker worker;
49 struct task_struct *worker_task;
50 struct kthread_work expired;
53 #define KVM_PIT_BASE_ADDRESS 0x40
54 #define KVM_SPEAKER_BASE_ADDRESS 0x61
55 #define KVM_PIT_MEM_LENGTH 4
56 #define KVM_PIT_FREQ 1193181
57 #define KVM_MAX_PIT_INTR_INTERVAL HZ / 100
58 #define KVM_PIT_CHANNEL_MASK 0x3
60 void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val, int hpet_legacy_start);
61 struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags);
62 void kvm_free_pit(struct kvm *kvm);
63 void kvm_pit_reset(struct kvm_pit *pit);