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_REGISTER_MODES (UFFDIO_REGISTER_MODE_MISSING | UFFDIO_REGISTER_MODE_WP | UFFDIO_REGISTER_MODE_MINOR) 24 #define UFFD_API_FEATURES (UFFD_FEATURE_PAGEFAULT_FLAG_WP | UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_EVENT_REMAP | UFFD_FEATURE_EVENT_REMOVE | UFFD_FEATURE_EVENT_UNMAP | UFFD_FEATURE_MISSING_HUGETLBFS | UFFD_FEATURE_MISSING_SHMEM | UFFD_FEATURE_SIGBUS | UFFD_FEATURE_THREAD_ID | UFFD_FEATURE_MINOR_HUGETLBFS | UFFD_FEATURE_MINOR_SHMEM) 25 #define UFFD_API_IOCTLS ((__u64) 1 << _UFFDIO_REGISTER | (__u64) 1 << _UFFDIO_UNREGISTER | (__u64) 1 << _UFFDIO_API) 26 #define UFFD_API_RANGE_IOCTLS ((__u64) 1 << _UFFDIO_WAKE | (__u64) 1 << _UFFDIO_COPY | (__u64) 1 << _UFFDIO_ZEROPAGE | (__u64) 1 << _UFFDIO_WRITEPROTECT | (__u64) 1 << _UFFDIO_CONTINUE) 27 #define UFFD_API_RANGE_IOCTLS_BASIC ((__u64) 1 << _UFFDIO_WAKE | (__u64) 1 << _UFFDIO_COPY | (__u64) 1 << _UFFDIO_CONTINUE) 28 #define _UFFDIO_REGISTER (0x00) 29 #define _UFFDIO_UNREGISTER (0x01) 30 #define _UFFDIO_WAKE (0x02) 31 #define _UFFDIO_COPY (0x03) 32 #define _UFFDIO_ZEROPAGE (0x04) 33 #define _UFFDIO_WRITEPROTECT (0x06) 34 #define _UFFDIO_CONTINUE (0x07) 35 #define _UFFDIO_API (0x3F) 36 #define UFFDIO 0xAA 37 #define UFFDIO_API _IOWR(UFFDIO, _UFFDIO_API, struct uffdio_api) 38 #define UFFDIO_REGISTER _IOWR(UFFDIO, _UFFDIO_REGISTER, struct uffdio_register) 39 #define UFFDIO_UNREGISTER _IOR(UFFDIO, _UFFDIO_UNREGISTER, struct uffdio_range) 40 #define UFFDIO_WAKE _IOR(UFFDIO, _UFFDIO_WAKE, struct uffdio_range) 41 #define UFFDIO_COPY _IOWR(UFFDIO, _UFFDIO_COPY, struct uffdio_copy) 42 #define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, struct uffdio_zeropage) 43 #define UFFDIO_WRITEPROTECT _IOWR(UFFDIO, _UFFDIO_WRITEPROTECT, struct uffdio_writeprotect) 44 #define UFFDIO_CONTINUE _IOWR(UFFDIO, _UFFDIO_CONTINUE, struct uffdio_continue) 45 struct uffd_msg { 46 __u8 event; 47 __u8 reserved1; 48 __u16 reserved2; 49 __u32 reserved3; 50 union { 51 struct { 52 __u64 flags; 53 __u64 address; 54 union { 55 __u32 ptid; 56 } feat; 57 } pagefault; 58 struct { 59 __u32 ufd; 60 } fork; 61 struct { 62 __u64 from; 63 __u64 to; 64 __u64 len; 65 } remap; 66 struct { 67 __u64 start; 68 __u64 end; 69 } remove; 70 struct { 71 __u64 reserved1; 72 __u64 reserved2; 73 __u64 reserved3; 74 } reserved; 75 } arg; 76 } __packed; 77 #define UFFD_EVENT_PAGEFAULT 0x12 78 #define UFFD_EVENT_FORK 0x13 79 #define UFFD_EVENT_REMAP 0x14 80 #define UFFD_EVENT_REMOVE 0x15 81 #define UFFD_EVENT_UNMAP 0x16 82 #define UFFD_PAGEFAULT_FLAG_WRITE (1 << 0) 83 #define UFFD_PAGEFAULT_FLAG_WP (1 << 1) 84 #define UFFD_PAGEFAULT_FLAG_MINOR (1 << 2) 85 struct uffdio_api { 86 __u64 api; 87 #define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1 << 0) 88 #define UFFD_FEATURE_EVENT_FORK (1 << 1) 89 #define UFFD_FEATURE_EVENT_REMAP (1 << 2) 90 #define UFFD_FEATURE_EVENT_REMOVE (1 << 3) 91 #define UFFD_FEATURE_MISSING_HUGETLBFS (1 << 4) 92 #define UFFD_FEATURE_MISSING_SHMEM (1 << 5) 93 #define UFFD_FEATURE_EVENT_UNMAP (1 << 6) 94 #define UFFD_FEATURE_SIGBUS (1 << 7) 95 #define UFFD_FEATURE_THREAD_ID (1 << 8) 96 #define UFFD_FEATURE_MINOR_HUGETLBFS (1 << 9) 97 #define UFFD_FEATURE_MINOR_SHMEM (1 << 10) 98 __u64 features; 99 __u64 ioctls; 100 }; 101 struct uffdio_range { 102 __u64 start; 103 __u64 len; 104 }; 105 struct uffdio_register { 106 struct uffdio_range range; 107 #define UFFDIO_REGISTER_MODE_MISSING ((__u64) 1 << 0) 108 #define UFFDIO_REGISTER_MODE_WP ((__u64) 1 << 1) 109 #define UFFDIO_REGISTER_MODE_MINOR ((__u64) 1 << 2) 110 __u64 mode; 111 __u64 ioctls; 112 }; 113 struct uffdio_copy { 114 __u64 dst; 115 __u64 src; 116 __u64 len; 117 #define UFFDIO_COPY_MODE_DONTWAKE ((__u64) 1 << 0) 118 #define UFFDIO_COPY_MODE_WP ((__u64) 1 << 1) 119 __u64 mode; 120 __s64 copy; 121 }; 122 struct uffdio_zeropage { 123 struct uffdio_range range; 124 #define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64) 1 << 0) 125 __u64 mode; 126 __s64 zeropage; 127 }; 128 struct uffdio_writeprotect { 129 struct uffdio_range range; 130 #define UFFDIO_WRITEPROTECT_MODE_WP ((__u64) 1 << 0) 131 #define UFFDIO_WRITEPROTECT_MODE_DONTWAKE ((__u64) 1 << 1) 132 __u64 mode; 133 }; 134 struct uffdio_continue { 135 struct uffdio_range range; 136 #define UFFDIO_CONTINUE_MODE_DONTWAKE ((__u64) 1 << 0) 137 __u64 mode; 138 __s64 mapped; 139 }; 140 #define UFFD_USER_MODE_ONLY 1 141 #endif 142