10e9b5cd6SAndrey Gruzdev /* 20e9b5cd6SAndrey Gruzdev * Linux UFFD-WP support 30e9b5cd6SAndrey Gruzdev * 40e9b5cd6SAndrey Gruzdev * Copyright Virtuozzo GmbH, 2020 50e9b5cd6SAndrey Gruzdev * 60e9b5cd6SAndrey Gruzdev * Authors: 70e9b5cd6SAndrey Gruzdev * Andrey Gruzdev <andrey.gruzdev@virtuozzo.com> 80e9b5cd6SAndrey Gruzdev * 90e9b5cd6SAndrey Gruzdev * This work is licensed under the terms of the GNU GPL, version 2 or 100e9b5cd6SAndrey Gruzdev * later. See the COPYING file in the top-level directory. 110e9b5cd6SAndrey Gruzdev */ 120e9b5cd6SAndrey Gruzdev 130e9b5cd6SAndrey Gruzdev #ifndef USERFAULTFD_H 140e9b5cd6SAndrey Gruzdev #define USERFAULTFD_H 150e9b5cd6SAndrey Gruzdev 16*d5890ea0SPeter Xu #ifdef CONFIG_LINUX 17*d5890ea0SPeter Xu 180e9b5cd6SAndrey Gruzdev #include "exec/hwaddr.h" 190e9b5cd6SAndrey Gruzdev #include <linux/userfaultfd.h> 200e9b5cd6SAndrey Gruzdev 21*d5890ea0SPeter Xu /** 22*d5890ea0SPeter Xu * uffd_open(): Open an userfaultfd handle for current context. 23*d5890ea0SPeter Xu * 24*d5890ea0SPeter Xu * @flags: The flags we want to pass in when creating the handle. 25*d5890ea0SPeter Xu * 26*d5890ea0SPeter Xu * Returns: the uffd handle if >=0, or <0 if error happens. 27*d5890ea0SPeter Xu */ 28*d5890ea0SPeter Xu int uffd_open(int flags); 290e9b5cd6SAndrey Gruzdev int uffd_query_features(uint64_t *features); 300e9b5cd6SAndrey Gruzdev int uffd_create_fd(uint64_t features, bool non_blocking); 310e9b5cd6SAndrey Gruzdev void uffd_close_fd(int uffd_fd); 320e9b5cd6SAndrey Gruzdev int uffd_register_memory(int uffd_fd, void *addr, uint64_t length, 330e9b5cd6SAndrey Gruzdev uint64_t mode, uint64_t *ioctls); 340e9b5cd6SAndrey Gruzdev int uffd_unregister_memory(int uffd_fd, void *addr, uint64_t length); 350e9b5cd6SAndrey Gruzdev int uffd_change_protection(int uffd_fd, void *addr, uint64_t length, 360e9b5cd6SAndrey Gruzdev bool wp, bool dont_wake); 370e9b5cd6SAndrey Gruzdev int uffd_copy_page(int uffd_fd, void *dst_addr, void *src_addr, 380e9b5cd6SAndrey Gruzdev uint64_t length, bool dont_wake); 390e9b5cd6SAndrey Gruzdev int uffd_zero_page(int uffd_fd, void *addr, uint64_t length, bool dont_wake); 400e9b5cd6SAndrey Gruzdev int uffd_wakeup(int uffd_fd, void *addr, uint64_t length); 410e9b5cd6SAndrey Gruzdev int uffd_read_events(int uffd_fd, struct uffd_msg *msgs, int count); 420e9b5cd6SAndrey Gruzdev bool uffd_poll_events(int uffd_fd, int tmo); 430e9b5cd6SAndrey Gruzdev 44*d5890ea0SPeter Xu #endif /* CONFIG_LINUX */ 45*d5890ea0SPeter Xu 460e9b5cd6SAndrey Gruzdev #endif /* USERFAULTFD_H */ 47