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