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 /* All members before "struct mutex lock" are protected by the lock. */
26 struct kvm_kpit_channel_state channels[3];
29 s64 period; /* unit: ns */
35 atomic_t pending; /* accumulated triggered timers */
37 struct kvm_irq_ack_notifier irq_ack_notifier;
41 struct kvm_io_device dev;
42 struct kvm_io_device speaker_dev;
44 struct kvm_kpit_state pit_state;
46 struct kvm_irq_mask_notifier mask_notifier;
47 struct kthread_worker *worker;
48 struct kthread_work expired;
51 #define KVM_PIT_BASE_ADDRESS 0x40
52 #define KVM_SPEAKER_BASE_ADDRESS 0x61
53 #define KVM_PIT_MEM_LENGTH 4
54 #define KVM_PIT_FREQ 1193181
55 #define KVM_MAX_PIT_INTR_INTERVAL HZ / 100
56 #define KVM_PIT_CHANNEL_MASK 0x3
58 struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags);
59 void kvm_free_pit(struct kvm *kvm);
61 void kvm_pit_load_count(struct kvm_pit *pit, int channel, u32 val,
62 int hpet_legacy_start);
63 void kvm_pit_set_reinject(struct kvm_pit *pit, bool reinject);