https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 0dd3ee31125508cd67f7e7172247f05b7fd1753a authored by Linus Torvalds on 07 January 2024, 20:18:38 UTC
Linux 6.7
Linux 6.7
Tip revision: 0dd3ee3
i8254.h
/* SPDX-License-Identifier: GPL-2.0 */
#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;
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 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