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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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71474e2f0f
Discard policy doesn't rely on information from notifiers, so we don't need to register notifiers unconditionally. We kept correct counts in case userspace switched between policies during runtime, but that can be avoided by reseting the state. Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
#ifndef __I8254_H
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#define __I8254_H
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#include <linux/kthread.h>
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#include <kvm/iodev.h>
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struct kvm_kpit_channel_state {
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u32 count; /* can be 65536 */
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u16 latched_count;
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u8 count_latched;
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u8 status_latched;
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u8 status;
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u8 read_state;
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u8 write_state;
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u8 write_latch;
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u8 rw_mode;
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u8 mode;
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u8 bcd; /* not supported */
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u8 gate; /* timer start */
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ktime_t count_load_time;
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};
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struct kvm_kpit_state {
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/* All members before "struct mutex lock" are protected by the lock. */
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struct kvm_kpit_channel_state channels[3];
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u32 flags;
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bool is_periodic;
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s64 period; /* unit: ns */
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struct hrtimer timer;
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u32 speaker_data_on;
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struct mutex lock;
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struct kvm *kvm;
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struct kvm_pit *pit;
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bool reinject;
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atomic_t pending; /* accumulated triggered timers */
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atomic_t irq_ack;
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struct kvm_irq_ack_notifier irq_ack_notifier;
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};
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struct kvm_pit {
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struct kvm_io_device dev;
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struct kvm_io_device speaker_dev;
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struct kvm *kvm;
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struct kvm_kpit_state pit_state;
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int irq_source_id;
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struct kvm_irq_mask_notifier mask_notifier;
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struct kthread_worker worker;
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struct task_struct *worker_task;
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struct kthread_work expired;
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};
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#define KVM_PIT_BASE_ADDRESS 0x40
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#define KVM_SPEAKER_BASE_ADDRESS 0x61
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#define KVM_PIT_MEM_LENGTH 4
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#define KVM_PIT_FREQ 1193181
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#define KVM_MAX_PIT_INTR_INTERVAL HZ / 100
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#define KVM_PIT_CHANNEL_MASK 0x3
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struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags);
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void kvm_free_pit(struct kvm *kvm);
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void kvm_pit_load_count(struct kvm_pit *pit, int channel, u32 val,
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int hpet_legacy_start);
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void kvm_pit_set_reinject(struct kvm_pit *pit, bool reinject);
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#endif
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