1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 *** To edit the content of this header, modify the corresponding 11 *** source file (e.g. under external/kernel-headers/original/) then 12 *** run bionic/libc/kernel/tools/update_all.py 13 *** 14 *** Any manual change here will be lost the next time this script will 15 *** be run. You've been warned! 16 *** 17 **************************************************************************** 18 ****************************************************************************/ 19 #ifndef _LINUX_USERFAULTFD_H 20 #define _LINUX_USERFAULTFD_H 21 #include <linux/types.h> 22 #define UFFD_API ((__u64) 0xAA) 23 #define UFFD_API_FEATURES (0) 24 #define UFFD_API_IOCTLS ((__u64) 1 << _UFFDIO_REGISTER | (__u64) 1 << _UFFDIO_UNREGISTER | (__u64) 1 << _UFFDIO_API) 25 #define UFFD_API_RANGE_IOCTLS ((__u64) 1 << _UFFDIO_WAKE | (__u64) 1 << _UFFDIO_COPY | (__u64) 1 << _UFFDIO_ZEROPAGE) 26 #define _UFFDIO_REGISTER (0x00) 27 #define _UFFDIO_UNREGISTER (0x01) 28 #define _UFFDIO_WAKE (0x02) 29 #define _UFFDIO_COPY (0x03) 30 #define _UFFDIO_ZEROPAGE (0x04) 31 #define _UFFDIO_API (0x3F) 32 #define UFFDIO 0xAA 33 #define UFFDIO_API _IOWR(UFFDIO, _UFFDIO_API, struct uffdio_api) 34 #define UFFDIO_REGISTER _IOWR(UFFDIO, _UFFDIO_REGISTER, struct uffdio_register) 35 #define UFFDIO_UNREGISTER _IOR(UFFDIO, _UFFDIO_UNREGISTER, struct uffdio_range) 36 #define UFFDIO_WAKE _IOR(UFFDIO, _UFFDIO_WAKE, struct uffdio_range) 37 #define UFFDIO_COPY _IOWR(UFFDIO, _UFFDIO_COPY, struct uffdio_copy) 38 #define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, struct uffdio_zeropage) 39 struct uffd_msg { 40 __u8 event; 41 __u8 reserved1; 42 __u16 reserved2; 43 __u32 reserved3; 44 union { 45 struct { 46 __u64 flags; 47 __u64 address; 48 } pagefault; 49 struct { 50 __u64 reserved1; 51 __u64 reserved2; 52 __u64 reserved3; 53 } reserved; 54 } arg; 55 } __packed; 56 #define UFFD_EVENT_PAGEFAULT 0x12 57 #define UFFD_PAGEFAULT_FLAG_WRITE (1 << 0) 58 #define UFFD_PAGEFAULT_FLAG_WP (1 << 1) 59 struct uffdio_api { 60 __u64 api; 61 __u64 features; 62 __u64 ioctls; 63 }; 64 struct uffdio_range { 65 __u64 start; 66 __u64 len; 67 }; 68 struct uffdio_register { 69 struct uffdio_range range; 70 #define UFFDIO_REGISTER_MODE_MISSING ((__u64) 1 << 0) 71 #define UFFDIO_REGISTER_MODE_WP ((__u64) 1 << 1) 72 __u64 mode; 73 __u64 ioctls; 74 }; 75 struct uffdio_copy { 76 __u64 dst; 77 __u64 src; 78 __u64 len; 79 #define UFFDIO_COPY_MODE_DONTWAKE ((__u64) 1 << 0) 80 __u64 mode; 81 __s64 copy; 82 }; 83 struct uffdio_zeropage { 84 struct uffdio_range range; 85 #define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64) 1 << 0) 86 __u64 mode; 87 __s64 zeropage; 88 }; 89 #endif 90