Release 4.7 arch/x86/kvm/i8254.h

#ifndef __I8254_H

#define __I8254_H

#include <linux/kthread.h>

#include <kvm/iodev.h>


struct kvm_kpit_channel_state {
	
u32 count; /* can be 65536 */
	
u16 latched_count;
	
u8 count_latched;
	
u8 status_latched;
	
u8 status;
	
u8 read_state;
	
u8 write_state;
	
u8 write_latch;
	
u8 rw_mode;
	
u8 mode;
	
u8 bcd; /* not supported */
	
u8 gate; /* timer start */
	
ktime_t count_load_time;
};


struct kvm_kpit_state {
	/* All members before "struct mutex lock" are protected by the lock. */
	
struct kvm_kpit_channel_state channels[3];
	
u32 flags;
	
bool is_periodic;
	
s64 period; 				/* unit: ns */
	
struct hrtimer timer;
	
u32    speaker_data_on;

	
struct mutex lock;
	
atomic_t reinject;
	
atomic_t pending; /* accumulated triggered timers */
	
atomic_t irq_ack;
	
struct kvm_irq_ack_notifier irq_ack_notifier;
};


struct kvm_pit {
	
struct kvm_io_device dev;
	
struct kvm_io_device speaker_dev;
	
struct kvm *kvm;
	
struct kvm_kpit_state pit_state;
	
int irq_source_id;
	
struct kvm_irq_mask_notifier mask_notifier;
	
struct kthread_worker worker;
	
struct task_struct *worker_task;
	
struct kthread_work expired;
};


#define KVM_PIT_BASE_ADDRESS	    0x40

#define KVM_SPEAKER_BASE_ADDRESS    0x61

#define KVM_PIT_MEM_LENGTH	    4

#define KVM_PIT_FREQ		    1193181

#define KVM_MAX_PIT_INTR_INTERVAL   HZ / 100

#define KVM_PIT_CHANNEL_MASK	    0x3

struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags);
void kvm_free_pit(struct kvm *kvm);

void kvm_pit_load_count(struct kvm_pit *pit, int channel, u32 val,
		int hpet_legacy_start);
void kvm_pit_set_reinject(struct kvm_pit *pit, bool reinject);

#endif
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