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[qemu.git] / include / qemu / userfaultfd.h
1 /*
2  * Linux UFFD-WP support
3  *
4  * Copyright Virtuozzo GmbH, 2020
5  *
6  * Authors:
7  *  Andrey Gruzdev   <[email protected]>
8  *
9  * This work is licensed under the terms of the GNU GPL, version 2 or
10  * later.  See the COPYING file in the top-level directory.
11  */
12
13 #ifndef USERFAULTFD_H
14 #define USERFAULTFD_H
15
16 #include "qemu/osdep.h"
17 #include "exec/hwaddr.h"
18 #include <linux/userfaultfd.h>
19
20 int uffd_query_features(uint64_t *features);
21 int uffd_create_fd(uint64_t features, bool non_blocking);
22 void uffd_close_fd(int uffd_fd);
23 int uffd_register_memory(int uffd_fd, void *addr, uint64_t length,
24         uint64_t mode, uint64_t *ioctls);
25 int uffd_unregister_memory(int uffd_fd, void *addr, uint64_t length);
26 int uffd_change_protection(int uffd_fd, void *addr, uint64_t length,
27         bool wp, bool dont_wake);
28 int uffd_copy_page(int uffd_fd, void *dst_addr, void *src_addr,
29         uint64_t length, bool dont_wake);
30 int uffd_zero_page(int uffd_fd, void *addr, uint64_t length, bool dont_wake);
31 int uffd_wakeup(int uffd_fd, void *addr, uint64_t length);
32 int uffd_read_events(int uffd_fd, struct uffd_msg *msgs, int count);
33 bool uffd_poll_events(int uffd_fd, int tmo);
34
35 #endif /* USERFAULTFD_H */
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