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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* irqfd: Allows an fd to be used to inject an interrupt to the guest.
* ioeventfd: Allow an fd to be used to receive a signal from the guest.
* All credit goes to kvm developers.
*/
#ifndef __LINUX_MSHV_EVENTFD_H
#define __LINUX_MSHV_EVENTFD_H
#include <linux/poll.h>
#include "mshv.h"
#include "mshv_root.h"
/* struct to contain list of irqfds sharing an irq. Updates are protected by
* partition.irqfds.resampler_lock
*/
struct mshv_irqfd_resampler {
struct mshv_partition *rsmplr_partn;
struct hlist_head rsmplr_irqfd_list;
struct mshv_irq_ack_notifier rsmplr_notifier;
struct hlist_node rsmplr_hnode;
};
struct mshv_irqfd {
struct mshv_partition *irqfd_partn;
struct eventfd_ctx *irqfd_eventfd_ctx;
struct mshv_guest_irq_ent irqfd_girq_ent;
seqcount_spinlock_t irqfd_irqe_sc;
u32 irqfd_irqnum;
struct mshv_lapic_irq irqfd_lapic_irq;
struct hlist_node irqfd_hnode;
poll_table irqfd_polltbl;
wait_queue_head_t *irqfd_wqh;
wait_queue_entry_t irqfd_wait;
struct work_struct irqfd_shutdown;
struct mshv_irqfd_resampler *irqfd_resampler;
struct eventfd_ctx *irqfd_resamplefd;
struct hlist_node irqfd_resampler_hnode;
};
void mshv_eventfd_init(struct mshv_partition *partition);
void mshv_eventfd_release(struct mshv_partition *partition);
void mshv_register_irq_ack_notifier(struct mshv_partition *partition,
struct mshv_irq_ack_notifier *mian);
void mshv_unregister_irq_ack_notifier(struct mshv_partition *partition,
struct mshv_irq_ack_notifier *mian);
bool mshv_notify_acked_gsi(struct mshv_partition *partition, int gsi);
int mshv_set_unset_irqfd(struct mshv_partition *partition,
struct mshv_user_irqfd *args);
int mshv_irqfd_wq_init(void);
void mshv_irqfd_wq_cleanup(void);
struct mshv_ioeventfd {
struct hlist_node iovntfd_hnode;
u64 iovntfd_addr;
int iovntfd_length;
struct eventfd_ctx *iovntfd_eventfd;
u64 iovntfd_datamatch;
int iovntfd_doorbell_id;
bool iovntfd_wildcard;
};
int mshv_set_unset_ioeventfd(struct mshv_partition *pt,
struct mshv_user_ioeventfd *args);
#endif /* __LINUX_MSHV_EVENTFD_H */
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