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 USERFAULTFD_IOC 0xAA 23 #define USERFAULTFD_IOC_NEW _IO(USERFAULTFD_IOC, 0x00) 24 #define UFFD_API ((__u64) 0xAA) 25 #define UFFD_API_REGISTER_MODES (UFFDIO_REGISTER_MODE_MISSING | UFFDIO_REGISTER_MODE_WP | UFFDIO_REGISTER_MODE_MINOR) 26 #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 | UFFD_FEATURE_EXACT_ADDRESS | UFFD_FEATURE_WP_HUGETLBFS_SHMEM) 27 #define UFFD_API_IOCTLS ((__u64) 1 << _UFFDIO_REGISTER | (__u64) 1 << _UFFDIO_UNREGISTER | (__u64) 1 << _UFFDIO_API) 28 #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) 29 #define UFFD_API_RANGE_IOCTLS_BASIC ((__u64) 1 << _UFFDIO_WAKE | (__u64) 1 << _UFFDIO_COPY | (__u64) 1 << _UFFDIO_CONTINUE | (__u64) 1 << _UFFDIO_WRITEPROTECT) 30 #define _UFFDIO_REGISTER (0x00) 31 #define _UFFDIO_UNREGISTER (0x01) 32 #define _UFFDIO_WAKE (0x02) 33 #define _UFFDIO_COPY (0x03) 34 #define _UFFDIO_ZEROPAGE (0x04) 35 #define _UFFDIO_WRITEPROTECT (0x06) 36 #define _UFFDIO_CONTINUE (0x07) 37 #define _UFFDIO_API (0x3F) 38 #define UFFDIO 0xAA 39 #define UFFDIO_API _IOWR(UFFDIO, _UFFDIO_API, struct uffdio_api) 40 #define UFFDIO_REGISTER _IOWR(UFFDIO, _UFFDIO_REGISTER, struct uffdio_register) 41 #define UFFDIO_UNREGISTER _IOR(UFFDIO, _UFFDIO_UNREGISTER, struct uffdio_range) 42 #define UFFDIO_WAKE _IOR(UFFDIO, _UFFDIO_WAKE, struct uffdio_range) 43 #define UFFDIO_COPY _IOWR(UFFDIO, _UFFDIO_COPY, struct uffdio_copy) 44 #define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, struct uffdio_zeropage) 45 #define UFFDIO_WRITEPROTECT _IOWR(UFFDIO, _UFFDIO_WRITEPROTECT, struct uffdio_writeprotect) 46 #define UFFDIO_CONTINUE _IOWR(UFFDIO, _UFFDIO_CONTINUE, struct uffdio_continue) 47 struct uffd_msg { 48 __u8 event; 49 __u8 reserved1; 50 __u16 reserved2; 51 __u32 reserved3; 52 union { 53 struct { 54 __u64 flags; 55 __u64 address; 56 union { 57 __u32 ptid; 58 } feat; 59 } pagefault; 60 struct { 61 __u32 ufd; 62 } fork; 63 struct { 64 __u64 from; 65 __u64 to; 66 __u64 len; 67 } remap; 68 struct { 69 __u64 start; 70 __u64 end; 71 } remove; 72 struct { 73 __u64 reserved1; 74 __u64 reserved2; 75 __u64 reserved3; 76 } reserved; 77 } arg; 78 } __attribute__((__packed__)); 79 #define UFFD_EVENT_PAGEFAULT 0x12 80 #define UFFD_EVENT_FORK 0x13 81 #define UFFD_EVENT_REMAP 0x14 82 #define UFFD_EVENT_REMOVE 0x15 83 #define UFFD_EVENT_UNMAP 0x16 84 #define UFFD_PAGEFAULT_FLAG_WRITE (1 << 0) 85 #define UFFD_PAGEFAULT_FLAG_WP (1 << 1) 86 #define UFFD_PAGEFAULT_FLAG_MINOR (1 << 2) 87 struct uffdio_api { 88 __u64 api; 89 #define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1 << 0) 90 #define UFFD_FEATURE_EVENT_FORK (1 << 1) 91 #define UFFD_FEATURE_EVENT_REMAP (1 << 2) 92 #define UFFD_FEATURE_EVENT_REMOVE (1 << 3) 93 #define UFFD_FEATURE_MISSING_HUGETLBFS (1 << 4) 94 #define UFFD_FEATURE_MISSING_SHMEM (1 << 5) 95 #define UFFD_FEATURE_EVENT_UNMAP (1 << 6) 96 #define UFFD_FEATURE_SIGBUS (1 << 7) 97 #define UFFD_FEATURE_THREAD_ID (1 << 8) 98 #define UFFD_FEATURE_MINOR_HUGETLBFS (1 << 9) 99 #define UFFD_FEATURE_MINOR_SHMEM (1 << 10) 100 #define UFFD_FEATURE_EXACT_ADDRESS (1 << 11) 101 #define UFFD_FEATURE_WP_HUGETLBFS_SHMEM (1 << 12) 102 __u64 features; 103 __u64 ioctls; 104 }; 105 struct uffdio_range { 106 __u64 start; 107 __u64 len; 108 }; 109 struct uffdio_register { 110 struct uffdio_range range; 111 #define UFFDIO_REGISTER_MODE_MISSING ((__u64) 1 << 0) 112 #define UFFDIO_REGISTER_MODE_WP ((__u64) 1 << 1) 113 #define UFFDIO_REGISTER_MODE_MINOR ((__u64) 1 << 2) 114 __u64 mode; 115 __u64 ioctls; 116 }; 117 struct uffdio_copy { 118 __u64 dst; 119 __u64 src; 120 __u64 len; 121 #define UFFDIO_COPY_MODE_DONTWAKE ((__u64) 1 << 0) 122 #define UFFDIO_COPY_MODE_WP ((__u64) 1 << 1) 123 __u64 mode; 124 __s64 copy; 125 }; 126 struct uffdio_zeropage { 127 struct uffdio_range range; 128 #define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64) 1 << 0) 129 __u64 mode; 130 __s64 zeropage; 131 }; 132 struct uffdio_writeprotect { 133 struct uffdio_range range; 134 #define UFFDIO_WRITEPROTECT_MODE_WP ((__u64) 1 << 0) 135 #define UFFDIO_WRITEPROTECT_MODE_DONTWAKE ((__u64) 1 << 1) 136 __u64 mode; 137 }; 138 struct uffdio_continue { 139 struct uffdio_range range; 140 #define UFFDIO_CONTINUE_MODE_DONTWAKE ((__u64) 1 << 0) 141 __u64 mode; 142 __s64 mapped; 143 }; 144 #define UFFD_USER_MODE_ONLY 1 145 #endif 146