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/*
* Linux UFFD-WP support
*
* Copyright Virtuozzo GmbH, 2020
*
* Authors:
* Andrey Gruzdev <andrey.gruzdev@virtuozzo.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#ifndef USERFAULTFD_H
#define USERFAULTFD_H
#include "qemu/osdep.h"
#include "exec/hwaddr.h"
#include <linux/userfaultfd.h>
int uffd_query_features(uint64_t *features);
int uffd_create_fd(uint64_t features, bool non_blocking);
void uffd_close_fd(int uffd_fd);
int uffd_register_memory(int uffd_fd, void *addr, uint64_t length,
uint64_t mode, uint64_t *ioctls);
int uffd_unregister_memory(int uffd_fd, void *addr, uint64_t length);
int uffd_change_protection(int uffd_fd, void *addr, uint64_t length,
bool wp, bool dont_wake);
int uffd_copy_page(int uffd_fd, void *dst_addr, void *src_addr,
uint64_t length, bool dont_wake);
int uffd_zero_page(int uffd_fd, void *addr, uint64_t length, bool dont_wake);
int uffd_wakeup(int uffd_fd, void *addr, uint64_t length);
int uffd_read_events(int uffd_fd, struct uffd_msg *msgs, int count);
bool uffd_poll_events(int uffd_fd, int tmo);
#endif /* USERFAULTFD_H */
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